JP2000227271A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator which enables effective prevention of dew formation on an outer wall plate in an outer-peripheral edge part with which a heat insulating door of a refrigerator comes into contact and also which facilitates power saving and maintenance and check and enables attainment of high reliability. SOLUTION: A hot-air passage 11 is provided in the front-end edge part of the main body 4 of a refrigerator, along the outer-peripheral edge part of a part where it is in contact with a packing member of a heat insulating door 6. On the occasion of a cooling drive of a refrigerating unit, hot air passing through a condenser 9 in the refrigerating unit and discharged by a cooling fan 10 flows partly into a hot-air guiding duct 12 and is guided through the hot-air passage 11 and discharged from a hot-air outlet 11B of this passage 11. At this time, the part of the front-end edge part of the main body 4 of the refrigerator, which forms the hot-air passage 11, is heated and lowering of temperature is thereby prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator having a heat insulating box cooled by cold air generated by a refrigeration unit, and more particularly, to a hot air generated when a condenser of a refrigeration unit is cooled by a fan. By guiding along the outer wall plate of the outer peripheral edge where the heat insulating door of the heat insulating box abuts,
The present invention relates to a refrigerator capable of effectively preventing dew condensation occurring on an outer peripheral edge of a heat insulating door due to cold air in a heat insulating box.

[0002]

2. Description of the Related Art Conventionally, various refrigerators have been proposed. In general, this type of refrigerator controls the cooling of a cooler via a refrigerating unit disposed on the upper side of the refrigerator body. It is configured to circulate the cooled cool air in the refrigerator. The opening formed on the front surface of the refrigerator main body is closed by a heat insulating door pivotally supported by the refrigerator main body. Therefore, since the peripheral portion of the portion of the refrigerator body where the heat insulating door comes into contact is cooled by the cool air in the refrigerator, dew condensation due to contact with the outside air occurs at the outer peripheral portion of the portion where the heat insulating door comes into contact. There is. In order to solve this problem, a refrigerator has been proposed in which a dew condensation prevention heater is attached to the inner surface of a heat insulating wall where dew condensation occurs. FIG. 1 shows such a conventional refrigerator.
This will be described with reference to FIGS.

First, an example of a conventional refrigerator is shown in FIG.
This will be described with reference to FIG. FIG. 16 is a front view showing an example of a conventional refrigerator. FIG. 17 is an enlarged cross-sectional view of an AA part of the example of the conventional refrigerator shown in FIG. As shown in FIG. 16, the refrigerator 100 includes a heat-insulating box 101 and a refrigeration unit storage unit 102 disposed above the heat-insulating box 101. Further, the heat insulating box 101 includes a refrigerator main body 103 and a refrigerator main body 10.
And a heat-insulating door 105 which is attached to the opening 104 on the front face of the front panel 3 so as to be opened and closed. Leg members 109 are fixed to the lower surface of the refrigerator main body 103 at six positions (three positions are shown in FIG. 16), and the refrigerator 100 is connected to the floor or the like via these leg members 109. Is placed on top. Also, the refrigeration unit storage unit 10
2, a refrigeration unit including a compressor 106, a condenser 107, and a cooling fan 108 for cooling the condenser 107 is disposed.

As shown in FIG. 17, the refrigerator main body 103 is composed of an inner box 110 formed of a thin plate made of a steel plate, an outer box 111, and a foam material 112 made of urethane foam or the like filled therebetween. A joiner 113 is attached to the inner peripheral surface of the edge of the inner box 110. The outer peripheral edge of the inner surface of the heat insulating door 105 is formed of an elastically deformable material such as rubber.
The packing member 116 is attached to the front end face of the refrigerator main body 103 while being slightly pressed. At this time, the packing member 116 is substantially in contact with the outer edge (the right edge in FIG. 17) of the joiner 113 attached to the inner peripheral surface of the front end of the inner box 110. Thereby, the cold air in the refrigerator main body 103 is removed by the packing member 116.
Is prevented from leaking out of the refrigerator through the
Is kept airtight. Also, the packing member 116
A dew condensation prevention heater 117 is attached to the inner wall surface of the end edge of the outer box 111 with which the gasket comes into contact along the outer periphery of the abutting portion of the packing member 116 via a heater retainer 118. Thus, the outer wall surface of the outer peripheral portion of the outer box 111 where the packing member 116 abuts is heated by the dew condensation prevention heater 117 and kept at approximately room temperature, thereby preventing dew condensation occurring in this portion.

Next, another example of a conventional refrigerator is shown in FIG.
8 and FIG. FIG. 18 is a front view showing another example of the conventional refrigerator. FIG. 19 shows FIG.
FIG. 7 is an enlarged cross-sectional view of a section BB of another example of the conventional refrigerator shown in FIG. As shown in FIG. 18, the refrigerator 120
It comprises a heat-insulating box 121 and the refrigeration unit storage section 102 disposed above the heat-insulating box 121.
The heat insulating box 121 covers the refrigerator main body 122 and almost the left half of the opening 123 on the front surface of the refrigerator main body 122, and is openable and closable on the left side.
24 and an almost right half of the opening 124, and a right heat insulating door 125 attached to the right side so as to be openable and closable. Further, leg members 129 are fixedly provided at four places (two places are shown in FIG. 18) on the lower surface of the refrigerator main body 123, and the refrigerator 120 is connected to the floor or the like via these leg members 129. Is placed on top.

[0006] The refrigerator main body 122 is the same as the refrigerator main body 1 described above.
03, except that the dew condensation prevention heater 117 is not attached. In addition, packing members 126, 1 formed of elastically deformable rubber magnets are provided on the outer peripheral edges of the inner surfaces of the left insulating door 124 and the right insulating door 125.
27, and each packing member 126, 1
Reference numeral 27 is abutted on the front edge of the refrigerator main body 122 while being slightly pressed by the attraction force of the magnet. In addition, a predetermined gap is formed between the right end surface of the left heat insulating door 124 and the left end surface of the right heat insulating door 125. The packing members 126 and 127 abut slightly against the inner side surface of the right side edge of the left heat insulating door 124 when closed, and are fitted into the opening 123 to be inserted into the right side of the left heat insulating door 124. A heat insulating wall member 128 for closing a gap between the end face and the left end face of the right heat insulating door 125 is attached. Therefore, each of the packing members 126 and 127 is closed when the refrigerator body 1 is closed.
The cold air inside the refrigerator main body 122 is prevented from leaking out of the refrigerator via the packing members 126 and 127 because the front end edge of the refrigerator 22 and the heat insulating wall member 128 are abutted while being slightly pressed. The interior is kept airtight

As shown in FIG. 19, the heat insulating wall member 128 has an outer wall plate 130 to which the packing members 126 and 127 are abutted in a slightly pressed state, an inner wall plate 131 to be inserted into the refrigerator, and a space therebetween. And a foam material 132 made of urethane foam or the like to be filled. Further, the inner wall plate 131 and the outer wall plate 130 are both formed of a thin plate made of a steel plate. The heat insulating wall member 128 is attached to the inside of the right end of the left heat insulating door 124 via the attachment member 133. Further, the dew condensation preventing heater 13 extends over substantially the entire length of the inner wall surface of the outer wall plate 130 substantially on the center line in the vertical direction.
5 is attached via a heater retainer 136. Thereby, each packing member 1 of the heat insulating wall member 128
By heating the outer wall plate 130 in the outer peripheral portion where the outer and upper surfaces 26 and 127 are in contact with the dew condensation prevention heater 135 and keeping the outer wall plate 130 at almost room temperature, dew condensation generated in this portion can be prevented.

[0008]

However, in the above-described conventional refrigerators 100 and 120, the dew condensation preventing heaters are provided on the inner surface of the outer peripheral edge of the portion where the heat insulating door 105 contacts, and on the inner surface of the outer wall plate 130 of the heat insulating wall member 128. 117, 13
5, the assembling work of the refrigerator main body 103 and the heat insulating wall member 128 becomes complicated, and there is a problem that work efficiency is reduced. In addition, each refrigerator 100, 120
In this case, since it is necessary to attach the dew condensation prevention heaters 117 and 135, there is a problem that the wiring work is complicated, the workability of the assembling work is reduced, and the manufacturing cost is increased. In addition, since the dew condensation prevention heaters 117 and 135 are buried in the heat insulating material, there is a problem that it is difficult to repair in the event of a failure such as a heater disconnection. Furthermore, the heat insulating wall member 1
Since the wiring of the dew condensation prevention heater 135 attached inside 28 is routed near the fulcrum of the left heat insulating door 124, there is a problem that the opening and closing of the left heat insulating door 124 may cause disconnection or leakage.

Accordingly, the present invention has been made to solve the above-mentioned problem, and the heat-insulating door of a refrigerator contacts hot air generated when a condenser of a refrigeration unit is cooled by a cooling fan. By guiding along the outer wall plate at the outer peripheral edge, it is possible to effectively prevent dew condensation occurring on the outer peripheral edge of the heat insulating door due to cold air in the refrigerator, and to save power and perform maintenance and inspection. It is an object of the present invention to provide a refrigerator which is easy to use and can achieve high reliability. It is another object of the present invention to provide a refrigerator capable of improving assembly workability and reducing manufacturing costs.

[0010]

According to a first aspect of the present invention, there is provided a refrigerator according to a first aspect of the present invention, which includes a refrigeration unit storage section for storing a refrigeration unit, and sucks outside air into the refrigeration unit storage section. A fan device that heats the outside air by a heat-generating component of the unit to generate warm air, a heat-insulating box that is internally cooled by cool air generated by the refrigeration unit, and a fan device that is provided at a predetermined position of the heat-insulating box. And a hot air passage for guiding a portion of the hot air discharged from the heat insulating box along the outer wall plate where condensation occurs in the heat insulating box.

[0011] In the refrigerator according to the first aspect having such a feature, the outside air sucked by the fan device into the refrigeration unit storage section is heated by the heat-generating components of the refrigeration unit to be heated. Further, the inside of the heat insulating box is cooled by cold air generated by the refrigeration unit.
A hot air passage is provided at a predetermined position of the heat-insulating box to guide a part of the hot air discharged from the fan device along the outer wall plate on which condensation occurs in the heat-insulating box. As a result, the outer wall plate on which dew condensation occurs in the heat insulating box is heated by the warm air discharged from the fan device and flowing through the warm air passage, so that the occurrence of dew condensation on the outer wall plate can be effectively prevented. Becomes In addition, since the installation of the dew condensation prevention heater and the like can be eliminated, maintenance and inspection can be facilitated and high reliability can be achieved. In addition, assembling workability can be improved and manufacturing cost can be reduced.

Further, the refrigerator according to claim 2 is a refrigerator according to claim 1.
, A hot air guide duct for guiding hot air discharged from the fan device from a position near the exhaust side of the fan device to a hot air inlet of the hot air passage is provided.

[0013] In the refrigerator according to the second aspect having such a feature, in the refrigerator according to the first aspect, the hot air discharged from the fan device is supplied from a position near the exhaust side of the fan device to the hot air passage. Since the hot air induction duct is provided to guide the hot air to the hot air inlet, a part of the hot air discharged from the fan device is efficiently guided into the hot air passage to generate dew on the outer wall of the heat insulating box. Can be effectively prevented. In addition, since a part of the hot air discharged from the fan device can be guided into the hot air passage by the hot air induction duct, it is possible to save power, and since the configuration is simple, maintenance and inspection are required. This can be easily performed.

Further, the refrigerator according to claim 3 is a refrigerator according to claim 1.
The refrigerator according to claim 1, further comprising a blower fan for sending out hot air discharged from the fan device into the hot air passage at a position near the hot air inlet or the hot air inlet of the hot air passage. I do.

According to a third aspect of the present invention, there is provided a refrigerator as set forth in the first aspect, wherein the fan is discharged from the fan device to a warm air inlet of the warm air passage or a position near the warm air inlet. Since the blower fan that sends out the hot air into the hot air passage is arranged, the hot air is guided more efficiently into the hot air passage, and the occurrence of dew condensation on the outer wall of the heat insulating box is effectively prevented. It becomes possible. In addition, under severe conditions of refrigerators, for example, conditions where dew condensation occurs in places where the groundwater level is relatively high and there is no appropriate moisture-proof equipment, or where water is often used and the humidity is always high, etc. Is easily satisfied, and even when used in a place where the amount of dew condensation is large, it is possible to effectively prevent the dew condensation on the outer wall of the heat insulating box.

Further, the refrigerator according to claim 4 is a refrigerator according to claim 3.
, A changeover switch for changing an operation state of the blower fan is provided.

According to a fourth aspect of the present invention, there is provided a refrigerator according to the third aspect, further comprising a changeover switch for switching an operation state of the blower fan. Can be switched, and it is possible to effectively prevent the occurrence of dew condensation while saving the power of the blower fan in accordance with the use condition of the refrigerator.

Further, the refrigerator according to claim 5 is a refrigerator according to claim 4.
In the refrigerator described in 1 above, the changeover switch is a first mode in which the blower fan is switched to an operating state in conjunction with an on state of the refrigerator, and a second mode in which the blower fan is operated in conjunction with on / off of the refrigeration unit. And can be switched.

According to a fifth aspect of the present invention, there is provided a refrigerator as set forth in the fourth aspect, wherein the changeover switch switches the blower fan to an operating state in conjunction with an ON state of the refrigerator. Since it is possible to switch between the second mode in which the blower fan is operated in conjunction with the on / off of the refrigeration unit, the power consumption of the blower fan can be reduced more efficiently in accordance with the use conditions of the refrigerator. Generation can be effectively prevented.

Further, the refrigerator according to claim 6 is a refrigerator according to claim 1.
6. The refrigerator according to claim 5, wherein the heat-insulating box body has a refrigerator main body having an opening on at least one surface, and a heat-insulating body rotatably supported by the refrigerator main body to close and close the opening. A door, and the predetermined position is:
An outer peripheral portion of a portion of the refrigerator main body that contacts the heat insulating door.

In the refrigerator according to the sixth aspect having such a feature, in the refrigerator according to any one of the first to fifth aspects, the heat-insulating box body includes a refrigerator main body having an opening on at least one surface; And a heat insulating door rotatably supported by the refrigerator main body to open and close the opening. The hot air passage is provided at an outer peripheral portion of a portion of the refrigerator body that comes into contact with the heat insulating door. Accordingly, the outer wall plate of the outer peripheral portion of the portion of the refrigerator main body that contacts the heat insulating door is heated by the hot air guided in the hot air passage, and thus the portion of the refrigerator main body that contacts the heat insulating door is heated. It is possible to effectively prevent dew condensation occurring on the outer wall plate at the outer peripheral edge. Further, since the installation of the dew condensation prevention heater and the like can be eliminated, maintenance and inspection can be facilitated and high reliability can be achieved.

Further, the refrigerator according to claim 7 is the refrigerator according to claim 6
Wherein the refrigerator main body includes a duct member, and the hot air passage is formed in the heat insulating wall by attaching the duct member to the inside of the outer wall plate at the predetermined position. .

[0023] In the refrigerator according to the seventh aspect having the above-described features, in the refrigerator according to the sixth aspect, the hot air passage is formed on an inner side of an outer wall plate at an outer peripheral portion of a portion that comes into contact with the heat insulating door of the refrigerator body. And a duct member is attached to the heat insulating wall. Accordingly, there is no protrusion on the outer surface of the refrigerator main body, so that the installation space can be saved and the appearance can be improved.

Further, the refrigerator according to claim 8 is a refrigerator according to claim 1.
The refrigerator according to any one of claims 1 to 5, wherein the heat-insulating box body has a refrigerator main body having an opening on at least one surface, and a first pivotally rotatably supported by one side of the refrigerator main body.
An insulation door, and a second insulation door rotatably supported on the other side of the refrigerator main body, wherein the opening is openably closed by the first insulation door and the second insulation door, The predetermined position is a portion where the first heat insulating door and the second heat insulating door face each other when the opening is closed.

[0025] In the refrigerator according to the eighth aspect having such features, in the refrigerator according to any one of the first to fifth aspects, the heat-insulating box body includes a refrigerator main body having an opening on at least one surface; The refrigerator comprises a first heat-insulating door rotatably supported on one side of the refrigerator main body, and a second heat-insulating door rotatably supported on the other side of the refrigerator main body.
In addition, the opening is closed by the first heat insulating door and the second heat insulating door so as to be freely opened and closed. The hot air passage is provided at a portion where the first heat insulating door and the second heat insulating door face each other when the opening is closed. Accordingly, when the opening of the refrigerator main body is closed by the first heat insulating door and the second heat insulating door, the warm air passage is provided at a portion facing the first heat insulating door and the second heat insulating door. It is possible to effectively prevent the dew condensation on the outer wall of the portion where the first heat insulation door and the second heat insulation door face each other. In addition, since the installation of the dew condensation prevention heater and the like can be eliminated, maintenance and inspection are easy and high reliability can be achieved.
Manufacturing costs can be reduced.

Further, in the refrigerator according to a ninth aspect, in the refrigerator according to the eighth aspect, the first heat-insulating door is mounted inside a side edge facing the second heat-insulating door,
When the opening is closed, the second insulating door includes a heat insulating wall member that is inserted into the opening to cover the opening along the side edge and abuts the inside of the second heat insulating door. A cover member attached to a side edge facing the first heat insulating door and covering a front side of the side edge of the first heat insulating door along the side edge when the opening is closed; (1) the side end surface of the heat insulating door and the second
A gap having a predetermined width is formed with the side end surface of the heat insulating door when the opening is closed, and the hot air passage is formed in cooperation with the heat insulating wall member and the covering member.

[0027] In the refrigerator according to the ninth aspect having such a feature, in the refrigerator according to the eighth aspect, the first refrigerator is provided.
Inside the side edge of the heat-insulating door facing the second heat-insulating door, the opening is fitted along the side edge when the opening is closed, and covers the opening along the side edge. A heat insulating wall member abutting on the inside is attached. In addition, a covering member that covers the front side of the side edge portion of the first heat insulating door along the side edge portion when the opening is closed at a side edge portion of the second heat insulating door facing the first heat insulating door. Is attached. Further, the first
The side end surface of the heat-insulating door and the side end surface of the second heat-insulating door form a gap having a predetermined width when the opening is closed, and the hot air passage is formed by covering the front and rear of this gap with the heat insulating wall member and the covering member. Is done. Thereby, the side end surface of the first heat insulating door, the side end surface of the second heat insulating door, the outer wall surface of the heat insulating wall member, and the inner surface of the covering member that form the warm air passage are heated by the warm air, It is possible to effectively prevent dew condensation on the outer wall surface of the heat insulating wall member. In addition, since the installation of the dew condensation prevention heater and the like can be eliminated, maintenance and inspection can be facilitated and high reliability can be achieved. In addition, assembling workability can be improved and manufacturing cost can be reduced. Further, since the front side of the hot air passage is covered with the covering member, it is possible to eliminate the protrusion to the front side of the refrigerator, etc., and it is possible to save the installation space and improve the appearance. Becomes possible.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a refrigerator according to the present invention will be described in detail with reference to the drawings based on first to fourth embodiments embodying the present invention. First, a refrigerator according to a first embodiment will be described with reference to FIGS.

First, a schematic configuration of the refrigerator according to the first embodiment will be described with reference to FIGS. FIG. 1 is a front view of the refrigerator according to the first embodiment. FIG. 2 is an enlarged cross-sectional view of the CC section of the refrigerator according to the first embodiment shown in FIG. As shown in FIG. 1, the refrigerator 1 includes a heat insulating box 2
And a refrigeration unit storage section 3 disposed above the heat insulating box 2. The heat-insulating box 2 includes a refrigerator body 4 and a heat-insulating door 6 that is openably and closably attached to an opening 5 on the front surface of the refrigerator body 4. Then, on the lower surface of the refrigerator main body 4, there are six places (3 in FIG. 1).
The location is indicated. ), The leg members 7 are fixedly provided, and the refrigerator 1 is disposed on a floor or the like via these leg members 7. In the refrigeration unit storage section 3, a refrigeration unit including a compressor 8, a condenser 9, and a cooling fan 10 for cooling the condenser 9 is disposed.

Further, a warm air passage 11 (see FIG. 2), which will be described later, is provided at the outer peripheral corner of the front end of the refrigerator body 4. The hot air inlet 11 </ b> A of the hot air passage 11 is formed on the upper surface of the refrigerator main body 4 and at the rear of the cooling fan 10.
A substantially L-shaped hot air induction duct 12 for guiding a part of the hot air discharged from the cooling fan 10 to the hot air inlet 11A is fixedly provided. The hot air outlet 11B of the hot air passage 11 is formed at a substantially lower central position of the front end surface of the refrigerator main body 4.

Then, as shown in FIG.
Is composed of an inner box 15 formed of a thin plate made of a steel plate, an outer box 16 and a foam material 17 made of urethane foam or the like filled between the inner box 15 and a joiner 18 on an inner peripheral surface of an edge of the inner box 15. Is attached. In addition, on the edge of the outer box 16, a side portion 16 </ b> A vertically bent inward, and
A bent portion 16B which is bent further inward from the side portion 16A and is inserted into the joiner 18 is formed. A duct member 19 is attached to the inside of the outer corner (lower right corner in FIG. 2) of the edge of the outer box 16, and the hot air passage 11 having a substantially square cross section is provided. I have. The cross-sectional shape of the duct member 19 is an inverted L-shape, and both side ends are vertically bent outward and fixed to the outer wall of the outer box 16 and the inner surface of the side portion 16A. Also, hot air passage 1
The height of the outer case 16 in the horizontal direction (the horizontal direction in FIG. 2)
Is formed so as to reach a portion where a packing member 21 to be described later comes into contact with the side portion 16A from the outer wall.

The outer peripheral edge of the inner surface of the heat insulating door 6 is formed of a material such as rubber which can be elastically deformed.
The packing member 21 is brought into contact with the front end surface of the refrigerator body 4 while being slightly pressed. At this time, the packing member 21 is attached to the front end edge of the joiner 18 attached to the inner peripheral surface of the front end of the inner box 15 (in FIG.
(Right end). Thereby, the cool air in the refrigerator body 4 is prevented from leaking out of the refrigerator via the packing member 21, and the refrigerator 1 is kept airtight.

Here, the condenser 9 constitutes a heat-generating component.
In addition, the cooling fan 10 functions as a fan device.
The outer box 16 forms an outer wall plate.

Next, the flow of warm air in the warm air passage 11 of the refrigerator 1 configured as described above will be described with reference to FIG. FIG. 3 is a diagram illustrating a flow of warm air during a cooling operation of the refrigeration unit of the refrigerator 1 according to the first embodiment. As shown in FIG. 3, during the cooling operation of the refrigeration unit disposed above the refrigerator main body 4, the cooling fan 10 is rotated, and is indicated by an arrow 22 from an intake hole (not shown) on the right side of the refrigeration unit storage unit 3. When the air is sucked as described above, the sucked outside air passes through the space between the condensers 9 and the like, is heated several degrees to several tens of degrees Celsius higher than the surrounding temperature, and is discharged from the cooling fan 10 to be warmed. And this warm air is each arrow 24A, 24B, 24C
, And is exhausted from an exhaust hole (not shown) provided on the left side or upper side of the refrigeration unit storage section 3.

Further, a part of the hot air discharged from the cooling fan 10 is
And is guided along the inside of the hot air induction duct 12 to the hot air inlet 11A of the hot air passage 11 and flows into the hot air passage 11. Then, the warm air flowing into the warm air passage 11 is diverted in the left-right direction as shown by an arrow 23A, guided as shown by arrows 23B to 23D and 23F to 23H, and guided to the warm air outlet 11B. Warm air is arrow 23E
And 23I, the air is exhausted from the hot air outlet 11B to the surroundings. As described above, when the warm air flows through the warm air passage 11, the portion forming the warm air passage 11 on the side 16A of the outer box 16 is heated to prevent the temperature from lowering. Therefore, it is possible to reliably prevent dew condensation occurring due to a decrease in the temperature of the outer peripheral edge portion of the heat insulating door 6 of the refrigerator main body 4 in contact with the packing member 21. In addition, as the flow rate of the hot air flowing into the hot air induction duct 12 is larger, the temperature of the outer peripheral portion of the portion of the heat insulating door 6 of the refrigerator main body 4 that comes into contact with the packing member 21 is maintained higher, thereby preventing dew condensation. However, such a hot air flow rate and the like are experimentally determined in advance.

As described in detail above, in the refrigerator 1 according to the first embodiment, the hot air passage 11 is formed at the front end of the refrigerator main body 4 along the outer peripheral edge of the portion of the heat insulating door 6 which contacts the packing member 21. It is provided. Then, when the cooling drive of the refrigeration unit is performed, warm air discharged from the cooling fan 10 through the condenser 9 in the refrigeration unit is:
A part of the hot air flows into the hot air induction duct 12 and is guided in the hot air passage 11.
It is exhausted from. At this time, the portion forming the hot air passage 11 of the side portion 16A of the outer box 16 is heated to prevent the temperature from lowering.

As a result, the outer peripheral portion of the portion of the refrigerator main body 4 that contacts the heat insulating door 6 is heated by the hot air guided through the hot air passage 11, so that the outer peripheral edge of the portion contacts the heat insulating door 6 of the refrigerator main body 4. It is possible to effectively prevent the dew condensation occurring on the outer peripheral edge of the portion where the heat is applied. In addition, since the installation of a dew condensation prevention heater or the like on the outer peripheral portion of the portion of the refrigerator main body 4 that contacts the heat insulating door 6 can be omitted, power saving can be achieved, and a simple configuration can be achieved. Maintenance and inspection are easy and high reliability can be achieved. In addition, since the duct member 19 is attached to the inner surface of the outer box 16 of the refrigerator main body 4 and is provided in the heat insulating wall, the warm air passage 11 has no protrusion on the outer surface of the refrigerator main body 4, and the space for the installation space is small. The space can be saved, and the appearance can be improved. Further, since a hot air induction duct 12 is provided to guide the hot air discharged from the cooling fan 10 from a position near the exhaust side of the cooling fan 10 to the hot air inlet 11A of the hot air passage 11, the hot air is discharged from the cooling fan 10. Part of the hot air can be efficiently guided into the hot air passage 11 to effectively prevent the dew condensation on the outer box 16 of the refrigerator body 4.

Next, a refrigerator according to a second embodiment will be described with reference to FIGS. First, a schematic configuration of a refrigerator according to the second embodiment will be described with reference to FIG. FIG. 4 is a front view of the refrigerator according to the second embodiment.
As shown in FIG. 4, the refrigerator 31 according to the second embodiment includes:
It has basically the same configuration as the refrigerator 1 according to the first embodiment, and substantially at the center of the upper surface of the refrigerator body 4 in the left and right directions,
The first embodiment is different from the first embodiment in that a hot air inlet 11C of the hot air passage 11 is provided at a rear portion of the cooling fan 10, and a blower fan 32 is provided near the hot air inlet 11C. This is different from the refrigerator 1. Therefore, in the following description, the same members and elements as those in the refrigerator 1 of the first embodiment are denoted by the same reference numerals. Here, the blower fan 32 forcibly sends the warm air (see FIG. 5) discharged to the rear side by the cooling fan 10 disposed in the refrigeration unit storage section 3 to the warm air inlet 11C of the warm air passage 11. Performs the sending action.

Subsequently, the refrigerator 3 configured as described above
The flow of the warm air in the warm air passage 11 will be described with reference to FIG. FIG. 5 is a front view showing the flow of warm air when the blower fan 32 is driven during the cooling operation of the refrigerating unit of the refrigerator 31 according to the second embodiment. As shown in FIG. 5, during the cooling operation of the refrigeration unit disposed above the refrigerator main body 4, the cooling fan 10 is rotated, and is indicated by an arrow 33 from an intake hole (not shown) on the right side of the refrigeration unit storage unit 3. When the air is sucked as described above, the sucked outside air passes through the space between the condensers 9 and the like, is heated several degrees to several tens of degrees Celsius higher than the surrounding temperature, and is discharged from the cooling fan 10 to be warmed. Then, the hot air flows as indicated by arrows 34A, 34B, and 34C, and is exhausted from an exhaust hole (not shown) provided on the left or upper side of the refrigeration unit storage unit 3.

A part of the hot air discharged from the cooling fan 10 is forcibly forced by the blowing fan 32 from the hot air inlet 11C to the hot air passage 1 as shown by arrows 35A and 35F.
1 is sent out. Then, the warm air flowing into the warm air passage 11 is diverted in the left-right direction and is divided into arrows 35B to 35B.
D and 35G-35I, guided by hot air outlet 1
The hot air guided to 1B is exhausted to the surroundings from the hot air outlet 11B as indicated by arrows 35E and 35J. As described above, when the hot air flows through the hot air passage 11, the outer box 16
The portion forming the hot air passage 11 of the side portion 16A is heated to prevent the temperature from lowering. Therefore, it is possible to reliably prevent dew condensation occurring due to a decrease in the temperature of the outer peripheral edge portion of the heat insulating door 6 of the refrigerator main body 4 in contact with the packing member 21. Further, even when the refrigerator 31 is used under severe conditions such as a high-temperature and high-humidity environment such as the rainy season, a large amount of warm air can be sent out into the warm air passage 11 by the blower fan 32. Insulated door 6 of refrigerator body 4
It is possible to effectively prevent the occurrence of dew condensation on the outer peripheral edge of the portion in contact with the packing member 21. It should be noted that as the flow rate of the hot air sent from the blower fan 32 is larger, the temperature of the outer peripheral portion of the portion of the heat insulating door 6 of the refrigerator main body 4 that comes into contact with the packing member 21 is maintained at a higher temperature to prevent dew condensation. The flow rate of the warm air, that is, the amount of air blown by the blower fan 32 and the like are determined experimentally in advance.

Next, a control circuit of the refrigerator 31 including the rotation control of the blower fan 32 will be described with reference to FIG. FIG. 6 is a circuit diagram showing a control circuit for controlling the refrigerator 31 according to the second embodiment. As shown in FIG. 6, between the pair of power supply lines L1 and L2, an in-chamber temperature detection thermo TH for detecting the in-chamber temperature of the heat insulating box 2, a relay switch X, a starting capacitor SC, a starting relay SR, and a compressor 8 , And an overload relay OL are connected in series. Also, the starting capacitor SC and the starting relay SR
In parallel with the relay switch X, the fan motor FM1 of the cooling fan 10, the fan motor FM2 of the internal fan (not shown), the changeover switch SW and the blower fan 32
Fan motor FM3 is connected to both power lines L1,
It is connected between L2.

Here, the changeover switch SW has three switch terminals T1, T2, T3. When the changeover switch SW is switched to the switch terminal T1, the fan motor FM3 is directly connected between the respective power lines L1, L2. Connection (first
Mode), and when the switch is switched to the switch terminal T2, the power supply to the fan motor FM3 is cut off. When the switch is switched to the switch terminal T3, the fan motor FM3 is connected to the power supply lines in parallel with the starting capacitor SC, the starting relay SR, and the like. L1 and L2 are connected (second mode). The changeover of the changeover switch SW may be a manual changeover or an automatic changeover.

A relay X and a cam timer TM are connected between the power lines L1 and L2. Here, the cam timer TM normally connects the relay X to each of the power lines L1 and L2 via the motor M and turns on the relay switch X to drive the compressor 8 and each of the fan motors FM1 and FM2. The cooling of the refrigerator 1 is performed, and when the defrosting of the cooler (not shown) is performed at predetermined time intervals, the relay X is disconnected from the power supply lines L1 and L2 and the relay switch X is turned off to turn off the compressor. 8. The operation of stopping the driving of each fan motor FM1, FM2 is performed. An earth leakage breaker ELB is connected between the power lines L1 and L2.

Next, the operation of the control circuit will be described with reference to FIGS. FIG. 7 is a timing chart during the cooling operation of the refrigerator 31 according to the second embodiment. Here, it is assumed that the changeover switch SW is first switched to the switch terminal T3. When the power of the refrigerator 31 is turned on, the relay X is turned on by the operation of the cam timer TM. When the relay X is turned on, the relay switch X is turned on, and the compressor 8, the fan motor FM1, and the fan motor FM2 are turned on and driven.
Thereby, the cooling drive of the refrigerator 31 is performed. At the time of this cooling drive, when the temperature inside the refrigerator 31 is lowered to turn off the temperature TH in the refrigerator, the power supply lines L1,
Compressor 8 from L2, each fan motor FM1, F
The power supply to M2 is cut off, whereby the driving of the compressor 8 and the like is stopped, and the cooling drive of the refrigerator 31 is stopped.
As described above, while the power of the refrigerator 31 is turned on, the cooling drive of the refrigerator 31 and the stop thereof are intermittently performed based on the operation of the in-chamber temperature detection thermo TH.

At this time, when the changeover switch SW is switched to the switch terminal T3 (second mode),
The fan motor FM3 of the blower fan 32 is connected to the power supply lines L1 and L2 in parallel with the compressor 8 and the fan motors FM1 and FM2.
The above-mentioned compressor 8, each fan motor FM1, FM
The rotation drive is performed intermittently in synchronization with the operation 2. As described above, when the changeover switch SW is switched to the switch terminal T3, the fan motor FM3 of the blower fan 32 uses the compressor 8 and each fan motor FM.
1. Since the motor is driven to rotate in synchronization with the FM2, for example, during periods other than the rainy season when the humidity is relatively low, power can be effectively saved without wasting power.

Further, the changeover switch SW is connected to the switch terminal T
2, the fan motor FM3 from each of the power lines L1 and L2, as is apparent from FIG.
The power supply to the fan 32 is completely cut off, and the fan motor FM3 is not driven to rotate.
Is stopped. Thus, when the changeover switch SW is switched to the switch terminal T2, the blower fan 3
Since the second fan motor FM3 is not driven to rotate, for example, the refrigerator 31 is installed in a place where the humidity environment is favorable,
If there is no risk of dew condensation on the outer peripheral edge of the portion of the heat insulating door 6 of the refrigerator body 4 that contacts the packing member 21,
Further, power consumption can be promoted by preventing wasteful power consumption.

Further, the changeover switch SW is connected to the switch terminal T
When the switch is switched to 1 (first mode), as is clear from FIG. 6, the power supply to the fan motor FM3 from each of the power supply lines L1 and L2 is always performed.
As long as the refrigerator 31 is turned on, the fan motor F
M3 is constantly driven to rotate so that the blower fan 32 blows air to the hot air passage 11. As described above, when the changeover switch SW is switched to the switch terminal T1, the fan motor FM3 of the blower fan 32 is constantly driven to rotate. Therefore, for example, the groundwater level is relatively high, and there is no appropriate moisture-proof equipment. Water is frequently used in the place or the surrounding area, and the condition of dew condensation is easily satisfied in a place where the humidity is always high. Also, when the refrigerator 31 is installed and used in a place where the amount of dew condensation is large, the air is blown. Hot air passage 1 via fan 32
By always forcibly blowing hot air into the inside 1, it is possible to effectively prevent dew condensation on the outer peripheral edge of a portion of the heat insulating door 6 of the refrigerator body 4 that contacts the packing member 21.

As described above, in the refrigerator 31 according to the second embodiment, the hot air inlet 11C of the hot air passage 11 is provided substantially at the center of the upper surface of the refrigerator main body 4 on the left and right sides and at the rear of the cooling fan 10. I have. And this hot air inlet 11C
The fan 32 is disposed at a position near the
, The hot air discharged from the cooling fan 10 through the condenser 9 in the refrigeration unit is
Part of the hot air flows into the hot air inlet 11C,
1 and is exhausted from the hot air outlet 11B of the hot air passage 11. At this time, the portion forming the hot air passage 11 of the side portion 16A of the outer box 16 is heated to prevent the temperature from lowering.

As a result, the outer peripheral portion of the portion of the refrigerator main body 4 that contacts the heat insulating door 6 is heated by the warm air guided through the warm air passage 11, so that the outer peripheral edge of the portion contacts the heat insulating door 6 of the refrigerator main body 4. It is possible to effectively prevent the dew condensation occurring on the outer peripheral edge of the portion where the heat is applied. In addition, since the installation of a dew condensation prevention heater or the like on the outer peripheral portion of the portion of the refrigerator main body 4 that contacts the heat insulating door 6 can be omitted, power saving can be achieved, and a simple configuration can be achieved. Maintenance and inspection are easy and high reliability can be achieved. In addition, since the duct member 19 is attached to the inner surface of the outer box 16 of the refrigerator main body 4 and is provided in the heat insulating wall, the warm air passage 11 has no protrusion on the outer surface of the refrigerator main body 4, and the space for the installation space is small. The space can be saved, and the appearance can be improved. In addition, by rotating the blower fan 32 as necessary, for example, water is often used in a place where the groundwater level is relatively high and there is no appropriate moisture-proof equipment or in the vicinity, and the humidity is always high. Even when the refrigerator 31 is installed and used in a place where the amount of dew condensation is large, it is easy to satisfy the condition of the occurrence of dew condensation in a place or the like.
1, the dew condensation on the outer peripheral edge of the portion of the heat insulating door 6 of the refrigerator body 4 that contacts the packing member 21 can be effectively prevented. As described above, even when the refrigerator 31 is used under severe conditions, the packing member 21 of the heat insulating door 6 of the refrigerator body 4 can be used.
It is possible to effectively prevent the occurrence of dew condensation on the outer peripheral edge portion of the portion that comes into contact with the surface. Further, by selectively switching to any one of the three switch terminals T1, T2, T3 in the changeover switch SW, the second mode (switch terminal) in which the fan motor FM3 of the blower fan 32 is rotationally driven in synchronization with the compressor 8 or the like. When switching to T3),
A mode in which the rotation of the fan motor FM3 is stopped (when the mode is switched to the switch terminal T2), and a first mode in which the fan motor FM3 is constantly driven to rotate (the switch terminal T2).
1) can be selected, thereby effectively saving the power of the blower fan 32 in accordance with the usage conditions including the installation location of the refrigerator 31 and the like.
It is possible to effectively prevent dew condensation on the outer peripheral edge of the portion of the heat insulating door 6 of the refrigerator main body 4 that contacts the packing member 21.

Next, a refrigerator according to a third embodiment will be described with reference to FIGS. First, a schematic configuration of a refrigerator according to the third embodiment will be described with reference to FIGS. FIG. 8 is a front view of the refrigerator according to the third embodiment. FIG. 9 is an enlarged cross-sectional view of the DD section of the refrigerator according to the third embodiment shown in FIG. As shown in FIG. 8, the refrigerator 41 includes a heat-insulating box 42 and a refrigeration unit storage section 43 disposed above the heat-insulating box 42. Further, the heat insulating box 42 covers substantially the left half of the refrigerator main body 44 and the opening 45 on the front surface of the refrigerator main body 44, and also has a left heat insulating door 46 attached to the left side so as to be openable and closable substantially right of the opening 45. A right heat-insulating door 47 which covers half and is openably and closably attached to the right side. The refrigerator body 44 has substantially the same configuration as the refrigerator body 4 (see FIGS. 1 and 2), but does not include the hot air passage 11. Further, leg members 48 are fixedly provided at four places (two places are shown in FIG. 8) on the lower surface of the refrigerator main body 44, and the refrigerator 41 is connected to the floor or the like via these leg members 48. Is placed on top.

In the refrigeration unit housing 43, a refrigeration unit including a compressor 49, a condenser 50, a cooling fan 51 for cooling the condenser 50, and the like is disposed. A front cover 43A (see FIG. 11) is attached to the front surface of the refrigeration unit storage section 43.
A ventilation port 43B is formed. The cooling fan 5
A substantially L-shaped hot air guide duct 52 (see FIG. 11) for guiding a part of the hot air discharged from the air outlet 1 to the ventilation port 43B is fixed.

As shown in FIGS. 8 and 9, packing members 54 and 55 formed of elastically deformable rubber magnets are provided on the outer peripheral edges of the inner surfaces of the left heat insulating door 46 and the right heat insulating door 47. The packing members 54 and 55 are attached to the refrigerator main body 44 by the attractive force of the magnet.
Abuts on the front edge of the. In addition, a predetermined gap is formed between the right end surface of the left heat insulation door 46 and the left end surface of the right heat insulation door 47. And, at the time of closing, each packing member 54, 55 comes into contact with the inner side surface of the right side edge portion of the left heat insulating door 46 in a state where it is slightly pressed,
A heat insulating wall member 56 that is inserted into the opening 45 to close a gap between the right end surface of the left heat insulating door 46 and the left end surface of the right heat insulating door 47.
Are attached by screws or the like via an attachment plate 57. Further, as shown in FIG.
Is an outer wall plate 56A to which the packing members 54 and 55 are abutted in a slightly pressed state, and an inner wall plate 56 to be inserted into the refrigerator.
B and a foam material 56C made of urethane foam or the like to be filled therebetween. In addition, the outer wall plate 56
A and the inner wall plate 56B are both formed of a thin plate made of a steel plate. Therefore, when the packing members 54 and 55 are closed, the packing members 54 and 55 abut against the front edge of the refrigerator body 44 and the heat insulating wall member 56 in a slightly pressed state. Wall member 56
Is prevented from leaking out of the refrigerator through the refrigerator, and the inside of the refrigerator 41 is kept airtight.

The left end surface of the right heat insulating door 47 has a substantially L-shaped cross section formed of a thin plate made of steel plate or resin.
A covering member 57 that covers a gap between the right end surface of the left insulated door 46 and the left end surface of the right insulated door 47 and covers the right end portion of the left insulated door 46 over the entire length in the vertical direction is provided with screws or the like. It is attached by. The inner side surface of the left edge of the covering member 57 and the front surface of the left heat insulating door 46 are almost in contact with each other. Thereby, when the refrigerator 41 is closed, the left heat-insulating door 46
A gap between the right end surface of the right and the left end surface of the right heat insulating door 47;
Outer wall plate 5 of each packing member 54, 55, heat insulating wall member 56
The 6A and the covering member 57 form a warm air passage 59 having a substantially square cross section.

Here, the condenser 50 constitutes a heat-generating component. Further, the cooling fan 51 functions as a fan device. The outer wall plate 56A of the heat insulating wall member 56 constitutes an outer wall plate. The left heat-insulating door 46 constitutes a first heat-insulating door, and the right heat-insulating door 47 constitutes a second heat-insulating door.

Next, the refrigerator 41 constructed as described above is used.
10 and FIG. 1 show the flow of warm air in the warm air passage 59 of FIG.
1 will be described. FIG. 10 is a diagram illustrating a flow of hot air during a cooling operation of the refrigeration unit of the refrigerator 41 according to the third embodiment. FIG. 11 is an enlarged sectional side view showing the flow of warm air in the EE section of the refrigerator 41 according to the third embodiment shown in FIG. As shown in FIG. 10, during the cooling operation of the refrigeration unit arranged above the refrigerator main body 44, the cooling fan 51 is rotated, and an arrow 61 is shown from the intake hole (not shown) on the right side of the refrigeration unit storage section 43. When the air is sucked as described above, the sucked outside air passes through the space between the condenser 50 and the like, is heated several degrees to ten and several degrees higher than the surrounding temperature, is discharged from the cooling fan 51, and is warmed. Then, the hot air flows as indicated by arrows 62A, 62B, and 62C, and is exhausted from exhaust holes (not shown) provided on the left side or upper side of the refrigeration unit storage section 43.

As shown in FIGS. 10 and 11, part of the hot air discharged from the cooling fan 51 flows into the hot air induction duct 52 as shown by an arrow 64, and
As shown in A, the air is guided to the ventilation opening 43A of the front cover 43 along the inside of the warm air guide duct 52, and flows into the warm air passage 59. Then, the warm air flowing into the warm air passage 59 is, as shown by arrows 64B and 64C,
The warm air guided downward and to the lower end of the warm air passage 59 is, as shown by an arrow 64D, the warm air passage 59.
It is exhausted from the lower end to the surroundings. As described above, when the warm air flows in the warm air passage 59, the outer wall plate 56 of the heat insulating wall member 56
The portion forming the hot air passage 59 of A is heated to prevent the temperature from lowering. Accordingly, it is possible to reliably prevent the dew condensation that occurs due to a decrease in the temperature of the outer peripheral edge portion of the heat insulating wall member 56 that comes into contact with each of the packing members 54 and 55.
In addition, the larger the flow rate of the hot air flowing into the hot air induction duct 52,
There is an effect of preventing the dew condensation by keeping the temperature of the outer peripheral portion of the heat insulating wall member 56 in contact with each of the packing members 54 and 55 high. The flow rate of the hot air and the like are determined experimentally in advance.

As described in detail above, in the refrigerator 41 according to the third embodiment, when the refrigerator 41 is closed,
9 is formed by a gap between the right end surface of the left heat insulation door 46 and the left end surface of the right heat insulation door 47, the packing members 54 and 55, the outer wall plate 56A of the heat insulation wall member 56, and the covering member 57. In addition, a front cover 43A is attached to the front of the refrigeration unit storage section 43,
At a position facing the hot air passage 59 on the lower surface of the 3A,
A ventilation port 43B is formed. When the cooling operation of the refrigeration unit is performed, a part of the hot air discharged from the cooling fan 51 through the condenser 50 in the refrigeration unit flows into the hot air induction duct 52, and the ventilation port is provided. The air is guided into the warm air passage 59 through 43B, and is exhausted from the lower end of the warm air passage 59. At this time, the hot air passage 5
The inside of 9 is heated to prevent the temperature from dropping.

Thus, the outer wall plate 56 of the heat insulating wall member 56
Since the portion forming the hot air passage 59 of A is heated to prevent the temperature from lowering, it is generated due to the lowering of the temperature of the outer peripheral edge of the portion of the heat insulating wall member 56 that contacts each of the packing members 54 and 55. Dew condensation can be reliably prevented. In addition, since the installation of the dew condensation prevention heater and the like can be eliminated, it is possible to save power, and since the configuration is simple, maintenance and inspection are easy and high reliability can be achieved. Further, since the front side of the warm air passage 59 is closed by a covering member 57 made of steel plate or resin, it is possible to eliminate the protrusion to the front side of the refrigerator 41 and to save the installation space. And at the same time improve the appearance. Further, a hot air induction duct 5 for guiding the hot air discharged from the cooling fan 51 from a position near the exhaust side of the cooling fan 51 to the upper end of the hot air passage 59.
2 is provided, a part of the hot air discharged from the cooling fan 51 is efficiently guided into the hot air passage 59, and the occurrence of dew condensation on the outer wall plate 56A of the heat insulating wall member 56 is effectively prevented. can do.

Next, a refrigerator according to a fourth embodiment will be described with reference to FIGS. First, a schematic configuration of a refrigerator according to a fourth embodiment will be described with reference to FIGS. FIG. 12 is a front view showing the flow of warm air when the blower fan is driven during the cooling operation of the refrigerating unit of the refrigerator according to the fourth embodiment. FIG. 13 is an enlarged side sectional view showing the flow of warm air in the FF section of the refrigerator according to the fourth embodiment shown in FIG. Here, the refrigerator 71 according to the fourth embodiment has basically the same configuration as the refrigerator 41 according to the third embodiment, and the blower fan 72 is provided near the ventilation opening 43B of the front cover 43A. Although the hot air induction duct 52 is not provided, the third
It is only different from the embodiment. Therefore, in the following description, the same members and elements as those of the refrigerator 41 of the third embodiment will be denoted by the same reference numerals.
A configuration characteristic of the embodiment will be described.

As shown in FIGS. 12 and 13, a blower fan 72 is provided in the front cover 43A in the vicinity of the ventilation port 43B. The blower fan 72 is mounted with screws on a mounting plate 72A fixed with screws or the like in the refrigeration unit storage section 43, and the front cover 43A
It is attached to the ventilation port 43B in an inclined state. Here, the blower fan 72 is connected to the refrigeration unit
The cooling fan 51 disposed in the inside 3 forcibly sends out the hot air discharged to the rear side through the air outlet 43B to the hot air passage 59.

Subsequently, the refrigerator 7 configured as described above is used.
The flow of the warm air in the first warm air passage 59 will be described with reference to FIGS. As shown in FIG. 12, during the cooling operation of the refrigeration unit disposed above the refrigerator main body 44, the cooling fan 51 is rotated, and is indicated by an arrow 73 from an intake hole (not shown) on the right side of the refrigeration unit storage section 43. When the air is sucked as described above, the sucked outside air passes through the space between the condenser 50 and the like, is heated several degrees to ten and several degrees higher than the surrounding temperature, is discharged from the cooling fan 51, and is warmed. Then, the hot air flows as indicated by arrows 74A, 74B, and 74C, and is exhausted from exhaust holes (not shown) provided on the left side and upper side of the refrigeration unit storage section 43.

As shown in FIGS. 12 and 13, part of the hot air discharged from the cooling fan 51 is indicated by an arrow 75A.
As shown in FIG.
The air is sent out into the hot air passage 59 via 3B. Then, the warm air flowing into the warm air passage 59 is guided downward as shown by arrows 75B and 75C, and the warm air guided to the lower end of the warm air passage 59 becomes an arrow 75D. As shown, the air is exhausted from the lower end of the hot air passage 59 to the periphery.
As described above, when the warm air flows in the warm air passage 59, the portion of the outer wall plate 56A of the heat insulating wall member 56 that forms the warm air passage 59 is heated to prevent the temperature from lowering. Accordingly, it is possible to reliably prevent the dew condensation that occurs due to a decrease in the temperature of the outer peripheral edge portion of the heat insulating wall member 56 that comes into contact with each of the packing members 54 and 55. Furthermore, even when the refrigerator 71 is used under severe conditions such as a high-temperature and high-humidity environment such as the rainy season, a large amount of warm air can be sent out into the warm air passage 59 by the blower fan 72. It is possible to effectively prevent the occurrence of dew condensation on the outer peripheral edge portion of the heat insulating wall member 56 in contact with each of the packing members 54, 55. Note that the larger the flow rate of the warm air sent from the blower fan 72,
Although there is an effect of preventing the dew condensation by maintaining the temperature of the outer peripheral portion of the portion in contact with each of the packing members 54 and 55 of the heat insulating wall member 56 high, the flow rate of the hot air, that is, the amount of air blown by the blower fan 72 and the like are It is determined experimentally in advance.

Next, a control circuit of the refrigerator 71 including the rotation control of the blower fan 72 will be described with reference to FIG. FIG. 14 is a circuit diagram showing a control circuit for controlling the refrigerator 71 according to the fourth embodiment. Here, the control circuit of the refrigerator 71 according to the fourth embodiment has basically the same configuration as the control circuit of the refrigerator 31 according to the second embodiment. Therefore, in the following description, the same members and elements as those of the control circuit of the refrigerator 31 according to the second embodiment will be described with the same reference numerals.

As shown in FIG. 14, a pair of power supply lines L
Between L3 and L4, an internal temperature detection thermo TH for detecting the internal temperature of the heat insulating box 42, a relay switch X, a starting capacitor SC, a starting relay SR, a compressor 49, and
An overload relay OL is connected in series. Also, in parallel with the starting capacitor SC, the starting relay SR, etc.,
The relay switch X includes a fan motor FM4 for the cooling fan 51, a fan motor FM5 for the internal fan (not shown),
The changeover switch SW and the fan motor FM6 of the blower fan 72 are connected between the two power lines L3 and L4, respectively.

Here, the changeover switch SW has three switch terminals T1, T2, T3. When the changeover switch SW is switched to the switch terminal T1, the fan motor FM6 is directly connected between the respective power lines L3, L4. Connection (first
Mode), and when the switch is switched to the switch terminal T2, the power supply to the fan motor FM6 is cut off. Further, when the switch is switched to the switch terminal T3, the fan motor FM6 is connected to the power supply lines in parallel with the starting capacitor SC, the starting relay SR, and the like. L3 and L4 are connected (second mode). The changeover of the changeover switch SW may be a manual changeover or an automatic changeover.

A relay X and a cam timer TM are connected between the power lines L3 and L4. Here, the cam timer TM normally drives the compressor 49 and the fan motors FM4 and FM5 by connecting the relay X and the power supply lines L3 and L4 via the motor M and turning on the relay switch X. The cooling of the refrigerator 71 is performed, and the connection between the relay X and each of the power lines L3 and L4 is cut off and the relay switch X is turned off when defrosting a cooler (not shown) at predetermined time intervals. 49, an operation of stopping the driving of each fan motor FM4, FM5. An earth leakage breaker ELB is connected between the power lines L3 and L4.

Next, the operation of the control circuit will be described with reference to FIG.
4 and FIG. FIG. 15 is a timing chart during the cooling operation of the refrigerator 71 according to the fourth embodiment. Here, it is assumed that the changeover switch SW is first switched to the switch terminal T3. Refrigerator 71
Is turned on, the relay X is turned on by the action of the cam timer TM. When the relay X is turned on, the relay switch X is turned on, and the compressor 49, the fan motor FM4, and the fan motor FM5 are turned on and driven. Thereby, the cooling drive of the refrigerator 71 is performed.
At the time of this cooling drive, when the temperature inside the refrigerator of the refrigerator 71 decreases and the temperature TH inside the refrigerator is turned off, the compressor 49 and the fan motor F from each of the power lines L3 and L4.
Power supply to M4 and FM5 is cut off, whereby the driving of the compressor 49 and the like is stopped, and the cooling drive of the refrigerator 71 is stopped. As described above, while the power of the refrigerator 71 is turned on, the cooling drive of the refrigerator 71 and the stop thereof are intermittently performed based on the action of the in-chamber temperature detection thermo TH.

At this time, when the changeover switch SW is switched to the switch terminal T3 (second mode),
The fan motor FM6 of the blower fan 72 is connected to the power supply lines L3 and L4 in parallel with the compressor 49 and the fan motors FM4 and FM5.
4. The rotational drive is performed intermittently in synchronization with the operation of the FM5. Thus, when the changeover switch SW is switched to the switch terminal T3, the blower fan 72
Is driven in synchronization with the compressor 49 and the fan motors FM4 and FM5.
For example, in periods other than the rainy season when the humidity is relatively low, power can be effectively saved without wasting power.

The changeover switch SW is connected to the switch terminal T
2, the fan motor FM6 from each of the power lines L3 and L4, as is apparent from FIG.
To the blower fan 72 without rotating the fan motor FM6.
Is stopped. Thus, when the changeover switch SW is switched to the switch terminal T2, the blower fan 7
Since the second fan motor FM6 is not driven to rotate, for example, the refrigerator 71 is installed in a location where the humidity environment is favorable,
When there is no risk of dew condensation occurring on the outer peripheral portion of the portion of the heat insulating wall member 56 that contacts the packing members 54 and 55,
Further, power consumption can be promoted by preventing wasteful power consumption.

Further, the changeover switch SW is connected to the switch terminal T
When the power is switched to 1 (first mode), as is clear from FIG. 14, power is always supplied to the fan motor FM6 from each of the power lines L3 and L4. As long as the fan motor FM6 is turned on, the fan motor FM6 is constantly driven to rotate, and the blower fan 72 blows air to the warm air passage 59. As described above, when the changeover switch SW is switched to the switch terminal T1, the fan motor FM6 of the blower fan 72 is constantly driven to rotate, and therefore, for example, has a relatively high groundwater level and does not have appropriate moisture-proof equipment. Water is frequently used in the place or the surrounding area, and the condition of dew condensation is easily satisfied in a place where humidity is always high. In addition, when the refrigerator 71 is installed and used in a place where the amount of dew condensation is large, air is blown. By always forcibly blowing hot air into the hot air passage 59 through the fan 72, the dew condensation on the outer peripheral edge of the portion of the heat insulating wall member 56 that comes into contact with each of the packing members 54, 55 can be effectively performed. Can be prevented.

As described above, in the refrigerator 71 according to the fourth embodiment, when the refrigerator 41 is closed, the warm air passage 59 is provided with a gap between the right end surface of the left heat insulation door 46 and the left end surface of the right heat insulation door 47, Each packing member 54, 55, heat insulating wall member 56
Of the outer wall plate 56A and the covering member 57.
A front cover 43A is attached to the front surface of the refrigeration unit storage section 43, and a ventilation port 43B is formed at a position on the lower surface of the front cover 43A facing the hot air passage 59. Further, a blower fan 72 is disposed near the ventilation port 43B. When the blower fan 72 is driven, a part of the warm air discharged from the cooling fan 51 through the condenser 50 in the refrigerating unit is sent to the warm air passage 59 through the ventilation port 43B. The air is guided through the warm air passage 59 and exhausted from the lower end to the surroundings. At this time, the right end surface of the left insulated door 46, the left end surface of the right insulated door 47, each packing member 5
4, 55, the outer wall plate 56A of the heat insulating wall member 56 and the portion forming the hot air passage 59 of the covering member 57 are heated to prevent the temperature from lowering.

Thus, the outer wall plate 56 of the heat insulating wall member 56
Since the portion forming the hot air passage 59 of A is heated to prevent the temperature from lowering, it is generated due to the lowering of the temperature of the outer peripheral edge of the portion of the heat insulating wall member 56 that contacts each of the packing members 54 and 55. Dew condensation can be reliably prevented. In addition, since the installation of the dew condensation prevention heater and the like can be eliminated, it is possible to save power, and since the configuration is simple, maintenance and inspection are easy and high reliability can be achieved. Further, since the front side of the warm air passage 59 is closed by a covering member 57 made of steel plate or resin, it is possible to eliminate the protrusion to the front side of the refrigerator 41 and to save the installation space. And at the same time improve the appearance. In addition, by rotating the blower fan 72 as needed, for example, water is often used in places where the groundwater level is relatively high and there is no appropriate moisture-proof equipment, or in the vicinity, and the humidity is always high. Even when the refrigerator 71 is installed and used in a place where the amount of dew condensation is large, it is easy to satisfy the condition of the occurrence of dew condensation in a place or the like.
9 can be forcibly guided, so that the occurrence of dew condensation on the outer peripheral edge of the portion of the heat insulating wall member 56 that contacts the packing members 54 and 55 can be effectively prevented. As described above, even when the refrigerator 71 is used under severe conditions, the packing members 54 and 55 of the heat insulating wall member 56 can be used.
It is possible to effectively prevent the occurrence of dew condensation on the outer peripheral edge portion of the portion that comes into contact with the surface. Further, by selectively switching to any one of the three switch terminals T1, T2, T3 of the changeover switch SW, the second mode (switch terminal) in which the fan motor FM6 of the blower fan 72 is rotationally driven in synchronization with the compressor 49 or the like. T3), a mode in which the rotation of the fan motor FM6 is stopped (when switched to the switch terminal T2), and a first mode in which the fan motor FM6 is constantly driven to rotate (when switched to the switch terminal T1). A portion that comes into contact with each of the packing members 54 and 55 of the heat insulating wall member 56 while effectively performing power saving of the blower fan 72 in a flexible manner corresponding to use conditions including the installation location of the refrigerator 71 and the like. , The occurrence of dew condensation on the outer peripheral portion can be effectively prevented.

The present invention is not limited to the first to fourth embodiments, and various improvements and modifications can be made without departing from the scope of the present invention. For example, the following may be performed. (A) In the first and second embodiments, the hot air outlet 11
B is formed on the front end face of the refrigerator main body 4.
May be formed on the lower surface, side surface, or the like. (B) In the first to fourth embodiments, the refrigeration unit storage sections 3 and 43 are disposed above the heat insulating boxes 2 and 42, respectively. Or it may be arranged on the side. In this case, the warm air inlet 11A may be formed on the lower surface or side surface of the refrigerator main body 4. (C) In the first and second embodiments, the hot air passage 11
Is provided in the heat insulating wall of the refrigerator body 4, but a configuration may be adopted in which a duct member is attached to the outer surface of the heat insulating wall to guide warm air along the outer surface of the heat insulating wall. (D) In the second and fourth embodiments, each of the blower fans 32 and 52 is arranged near the hot air inlet 11A and the inlet of the hot air passage 59. However, the hot air inlet 11A and the air outlet 43B are provided.
It may be configured to be directly attached to the camera. (E) In the second and fourth embodiments, each hot air passage 1
Although no condensation sensor is provided in each of the hot air passages 11 and 59, a condensation sensor is attached to a location where condensation is likely to occur in each of the hot air passages 11 and 59. , 52, or when the dew condensation is detected by the dew sensor, the amount of air blown by each of the blower fans 32, 52 may be increased.

[0074]

As described above in detail, in the refrigerator according to the first aspect, the outside air sucked by the fan device into the refrigeration unit storage section is heated by the heat-generating components of the refrigeration unit to be heated. Further, the inside of the heat insulating box is cooled by cold air generated by the refrigeration unit. A hot air passage is provided at a predetermined position of the heat-insulating box to guide a part of the hot air discharged from the fan device along the outer wall plate on which condensation occurs in the heat-insulating box. This allows
Since the outer wall plate on which dew condensation of the heat insulating box is generated is heated by warm air discharged from the fan device and flowing through the hot air passage, a refrigerator capable of effectively preventing the occurrence of dew condensation on the outer wall plate is provided. Can be provided. In addition, since the installation of the dew condensation prevention heater and the like can be eliminated, maintenance and inspection can be facilitated and high reliability can be achieved. In addition, a refrigerator capable of improving assembly workability and reducing manufacturing costs can be provided. can do.

In the refrigerator according to the second aspect, in the refrigerator according to the first aspect, the hot air discharged from the fan device is supplied from a position near the exhaust side of the fan device to a hot air inlet of the hot air passage. Since the hot air guide duct is provided, a part of the hot air discharged from the fan device is efficiently guided into the hot air passage to effectively prevent dew condensation on the outer wall of the heat insulating box. Can be provided. In addition, since a part of the hot air discharged from the fan device can be guided into the hot air passage by the hot air induction duct, it is possible to save power, and since the configuration is simple, maintenance and inspection are required. A refrigerator that can be easily performed can be provided.

According to a third aspect of the present invention, in the refrigerator according to the first aspect, the warm air discharged from the fan device is supplied to the warm air passage at or near the warm air inlet of the warm air passage. Since the blower fan for sending out into the hot air passage is arranged, it is possible to guide the hot air more efficiently into the hot air passage and effectively prevent the dew condensation on the outer wall of the heat insulating box. A refrigerator can be provided. In addition, under severe conditions of refrigerators, for example, conditions where dew condensation occurs in places where the groundwater level is relatively high and there is no appropriate moisture-proof equipment, or where water is often used and the humidity is always high, etc. And a refrigerator that can effectively prevent the occurrence of condensation on the outer wall of the heat insulating box even when used in a place where the amount of condensation is large.

According to a fourth aspect of the present invention, the refrigerator according to the third aspect further includes a changeover switch for switching an operation state of the blower fan. Therefore, the operation state of the blower fan is changed via the changeover switch. It is possible to provide a refrigerator that can be switched and that can effectively prevent the occurrence of dew condensation while saving the power of the blower fan according to the usage conditions of the refrigerator.

In the refrigerator according to a fifth aspect, in the refrigerator according to the fourth aspect, the changeover switch is configured to switch a blower fan to an operating state in conjunction with an ON state of the refrigerator, and the refrigeration unit. It is possible to switch between the second mode, in which the blower fan is activated in conjunction with the on / off operation of the fan, so that the generation of dew condensation can be effectively performed while more efficiently saving the power of the blower fan according to the use conditions of the refrigerator. Can be provided.

Further, in the refrigerator according to the sixth aspect, in the refrigerator according to any one of the first to fifth aspects, the heat-insulating box is provided with a refrigerator main body having an opening on at least one surface, and a refrigerator. A heat-insulating door movably pivotally supported to close and close the opening. The hot air passage is provided at an outer peripheral portion of a portion of the refrigerator body that comes into contact with the heat insulating door. Accordingly, the outer wall plate of the outer peripheral portion of the portion of the refrigerator main body that contacts the heat insulating door is heated by the hot air guided in the hot air passage, and thus the portion of the refrigerator main body that contacts the heat insulating door is heated. It is possible to provide a refrigerator capable of effectively preventing dew condensation occurring on an outer wall plate of an outer peripheral portion. In addition, since the installation of the dew condensation prevention heater and the like can be eliminated, a refrigerator that can be easily maintained and inspected and can achieve high reliability can be provided.

In the refrigerator according to a seventh aspect of the present invention, in the refrigerator according to the sixth aspect, a duct member is provided inside the outer wall plate at an outer peripheral portion of a portion in contact with the heat insulating door of the refrigerator body. Attached and formed in the insulation wall. Thereby, there is no protrusion on the outer surface of the refrigerator main body, so that it is possible to save the installation space and to provide a refrigerator that can improve the appearance.

[0081] In the refrigerator according to the eighth aspect, in the refrigerator according to any one of the first to fifth aspects, the heat-insulating box body includes a refrigerator main body having an opening on at least one surface, and a refrigerator main body. A first heat-insulating door pivotally supported on the side of the refrigerator main body, and a second heat-insulating door pivotally supported on the other side of the refrigerator main body. In addition, the opening is closed by the first heat insulating door and the second heat insulating door so as to be freely opened and closed. The hot air passage is provided at a portion where the first heat insulating door and the second heat insulating door face each other when the opening is closed. Accordingly, when the opening of the refrigerator main body is closed by the first heat insulating door and the second heat insulating door, the warm air passage is provided at a portion facing the first heat insulating door and the second heat insulating door. It is possible to provide a refrigerator that can effectively prevent the occurrence of dew condensation on the outer wall of a portion where the first heat-insulating door and the second heat-insulating door face each other. In addition, since the installation of the dew condensation prevention heater and the like can be eliminated, maintenance and inspection can be facilitated and high reliability can be achieved. In addition, a refrigerator capable of improving assembly workability and reducing manufacturing costs can be provided. can do.

Further, in the refrigerator according to the ninth aspect, in the refrigerator according to the eighth aspect, the inside of the side edge of the first heat-insulating door facing the second heat-insulating door is closed when the opening is closed. And a heat insulating wall member is attached to cover the opening along the side edge and abut against the inside of the second heat insulating door. In addition, a covering member that covers the front side of the side edge portion of the first heat insulating door along the side edge portion when the opening is closed at a side edge portion of the second heat insulating door facing the first heat insulating door. Is attached. Further, the side end surface of the first heat insulating door and the side end surface of the second heat insulating door form a gap having a predetermined width when the opening is closed, and the gap is covered with the heat insulating wall member and the covering member before and after the gap. A hot air passage is formed. Thereby, the side end surface of the first heat insulating door forming the warm air passage,
Since the side end surface of the second heat insulating door, the outer wall surface of the heat insulating wall member, and the inner surface of the covering member are heated by warm air, it is possible to effectively prevent dew condensation on the outer wall surface of the heat insulating wall member. A possible refrigerator can be provided. In addition, since the installation of the dew condensation prevention heater and the like can be eliminated, maintenance and inspection can be facilitated and high reliability can be achieved. In addition, a refrigerator capable of improving assembly workability and reducing manufacturing costs can be provided. can do. Further, since the front side of the hot air passage is covered by the covering member, it is possible to eliminate the protrusion to the front side of the refrigerator, etc., and it is possible to save the installation space and improve the appearance. It is possible to provide a refrigerator which can be used.

As described above, according to the present invention, the hot air generated when the condenser of the refrigeration unit is cooled by the cooling fan is guided along the outer wall plate on the outer peripheral edge with which the heat insulating door of the refrigerator comes into contact. A refrigerator capable of effectively preventing dew condensation occurring at the outer peripheral edge of the heat insulating door due to cool air in the refrigerator, and also capable of achieving high power saving, easy maintenance and high reliability. Can be provided. Further, it is possible to provide a refrigerator capable of improving assembly workability and reducing manufacturing costs.

[Brief description of the drawings]

FIG. 1 is a front view of a refrigerator according to a first embodiment.

FIG. 2 is a cross-sectional view of the refrigerator according to the first embodiment shown in FIG.
It is an expanded cross-sectional view of C part.

FIG. 3 is a diagram illustrating a flow of warm air during a cooling operation of the refrigeration unit of the refrigerator according to the first embodiment.

FIG. 4 is a front view of a refrigerator according to a second embodiment.

FIG. 5 is a front view showing a flow of warm air when a blowing fan is driven during a cooling operation of a refrigeration unit of a refrigerator according to a second embodiment.

FIG. 6 is a circuit diagram showing a control circuit for controlling a refrigerator according to a second embodiment.

FIG. 7 is a timing chart at the time of a cooling operation of the refrigerator according to the second embodiment.

FIG. 8 is a front view of a refrigerator according to a third embodiment.

FIG. 9 shows a refrigerator D- according to the third embodiment shown in FIG.
It is an expanded cross-sectional view of D part.

FIG. 10 is a diagram illustrating a flow of warm air during a cooling operation of a refrigeration unit of a refrigerator according to a third embodiment.

FIG. 11 is an enlarged side sectional view showing a flow of warm air in an EE section of the refrigerator according to the third embodiment shown in FIG.

FIG. 12 is a front view showing a flow of warm air when a blower fan is driven during a cooling operation of a refrigerating unit of a refrigerator according to a fourth embodiment.

FIG. 13 is an enlarged side sectional view showing a flow of warm air in an FF section of the refrigerator according to the fourth embodiment shown in FIG.

FIG. 14 is a circuit diagram showing a control circuit for controlling a refrigerator according to a fourth embodiment.

FIG. 15 is a timing chart during a cooling operation of the refrigerator according to the fourth embodiment.

FIG. 16 is a front view showing an example of a conventional refrigerator.

17 is an enlarged cross-sectional view of an example of a conventional refrigerator shown in FIG. 16 taken along the line AA.

FIG. 18 is a front view showing another example of the conventional refrigerator.

19 is an enlarged cross-sectional view of a portion BB of another example of the conventional refrigerator shown in FIG.

[Explanation of symbols]

1, 31, 41, 71, 100, 120 ... refrigerator,
3, 43, 102 ... refrigeration unit storage section, 4, 4
4, 103, 122 ... refrigerator body, 5, 45, 10
4, 123 ... opening, 6, 105 ... heat insulating door,
7, 48, 109, 129 ... leg members, 8, 49, 1
06 ... Compressor, 9,50,107 ... Condenser, 10,51,108 ... Cooling fan, 11,59
... hot air passage, 12, 52 ... hot air induction duct, 1
9 ... duct member, 21, 54, 55, 116, 12
6, 127: packing member, 32, 72: blower fan, 43A: front cover, 46, 124
..Left insulated doors, 47, 125 ... right insulated doors, 56, 1
28: heat insulating wall member, 57: covering member, 117,
135: Dew condensation prevention heater

Claims (9)

[Claims] 1. A refrigeration unit storage unit for storing a refrigeration unit, a fan device for sucking outside air into the refrigeration unit storage unit, and heating the outside air by a heat-generating component of the refrigeration unit to generate warm air; A heat insulating box whose inside is cooled by the cool air generated by the cooling device; and an outer wall provided at a predetermined position of the heat insulating box and allowing a part of warm air discharged from the fan device to cause condensation on the heat insulating box. A refrigerator comprising a hot air passage guided along a plate. 2. A hot air guide duct for guiding hot air discharged from the fan device from a position near an exhaust side of the fan device to a hot air inlet of the hot air passage. A refrigerator according to claim 1. 3. A blower fan for sending hot air discharged from the fan device into the hot air passage at a position near the hot air inlet or the hot air inlet of the hot air passage. The refrigerator according to claim 1. 4. The refrigerator according to claim 3, further comprising a changeover switch for switching an operation state of the blower fan. 5. The switch according to claim 1, further comprising: a first mode for switching the blower fan to an operating state in conjunction with an ON state of the refrigerator; and a second mode for operating the blower fan in conjunction with ON / OFF of the refrigeration unit. 5. The refrigerator according to claim 4, wherein the refrigerator can be switched. 6. The heat insulating box has a refrigerator main body having an opening on at least one surface, and an insulating door rotatably supported by the refrigerator main body and closing the opening so as to be openable and closable. The refrigerator according to any one of claims 1 to 5, wherein the position is an outer peripheral portion of a portion of the refrigerator body that contacts the heat insulating door. 7. The refrigerator body includes a duct member, and the hot air passage is formed in a heat insulating wall by attaching the duct member to an inside of the outer wall plate at the predetermined position. Item 7. The refrigerator according to Item 6. 8. A refrigerator body having an opening on at least one surface thereof, a first heat insulating door rotatably supported on one side of the refrigerator body, and a heat insulating box rotating on the other side of the refrigerator body. A second heat insulating door movably pivotally supported, wherein the opening is openably and closably closed by the first heat insulating door and the second heat insulating door, and the predetermined position is the first heat insulating when the opening is closed. The refrigerator according to any one of claims 1 to 5, wherein the refrigerator and the second heat-insulating door face each other. 9. The first heat-insulating door is mounted inside a side edge facing the second heat-insulating door, is inserted into the opening when the opening is closed, and extends along the side edge. A heat insulating wall member that covers the opening and abuts the inside of the second heat insulating door, wherein the second heat insulating door is attached to a side edge facing the first heat insulating door, and when the opening is closed. A cover member that covers a front side of the side edge portion of the first heat insulating door along the side edge portion, wherein a side end surface of the first heat insulating door and a side end surface of the second heat insulating door have an opening; 9. The refrigerator according to claim 8, wherein a gap having a predetermined width is formed at the time of closing, and the warm air passage is formed in cooperation with the heat insulating wall member and the covering member.