JPH11248332A - Refrigerator with heater to prevent condensation - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To prevent miswiring by simplifying the arrangement of heaters and power supply lines to heaters in a refrigerator provided with dew condensation prevention heaters for a freezer compartment and a refrigerator compartment, respectively. . At the same time, the labor of assembly is omitted. SOLUTION: A heater 14 on a freezing room 4 side and a refrigerating room 5 are provided.
The heaters 15 on the side are connected in series via a connection cord 19 to be integrated. The power supply line 20 is connected to the input side end of the former heater 14 and the input side end of the latter heater 15 to unify the power supply line 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is directed to a refrigerator in which a heater for preventing dew condensation is provided on the peripheral wall of an opening of an entrance, and an improvement has been made regarding a wiring form between the heater and a power supply line for the heater. Things.

[0002]

2. Description of the Related Art For example, in a conventional under-counter type refrigerator shown in FIG. 5, heaters 34, 35 for preventing dew condensation are formed along the peripheral walls of the openings 32, 33 of a freezer compartment 30 and a refrigerator compartment 31, respectively. Is arranged. Doorway 32.3
The peripheral wall of the opening 3 functions as a sealing wall for receiving the packing of the door which is swingably opened and closed, and both heaters 34 and 35 are embedded in the inner surface thereof. Although not shown, a heater having the same purpose is also embedded in a support 36 disposed at the front end of a central partition that separates the freezing room 30 and the refrigerating room 31. Incidentally, in the refrigerator disclosed in JP-A-8-110150, a heater for preventing dew condensation is provided on the surface of the peripheral wall of the opening of the entrance.

Each of the heaters 34 and 35 is composed of three linear heater units 34a and 35a along the opening side and a corner cord 37 for connecting the heater units 34a and 35a at the corners. The power supplies are connected in parallel via dedicated power supply lines 38 and 39, respectively.

[0004]

As described above, in the refrigerator in which the heater 34 for the freezer compartment and the heater 35 for the refrigerator compartment are connected in parallel, each heater 34, 35 is provided.
And the wiring work for the power supply lines 38 and 39 for each heater must be performed individually, so that the assembling work requires an extra amount of time. Specifically, each heater 34, 35
Must be fixed at a predetermined position, and the power supply lines 38 and 39 must be connected to the corresponding heaters 34 and 35, and then arranged along predetermined wiring paths and connected to connection terminals on the power supply side, respectively. As described above, when the number of working steps at the time of assembling is large, there is a high possibility that an erroneous wiring is generated, or an energization failure is caused due to an erroneous handling or forgetting to assemble. The heaters 34 and 35 are energized at all times to maintain the surface temperature of the peripheral wall of the opening at a non-condensing temperature and further promote the evaporation of water droplets attached to the wall surface.

SUMMARY OF THE INVENTION It is an object of the present invention to simplify the wiring configuration of a heater for preventing dew condensation and a power supply line for a heater, thereby reducing the time and effort required for assembling the heater and the power supply line, and further reducing erroneous wiring and assembly errors. An object of the present invention is to eliminate the possibility of assembling errors and to assemble the refrigerator reliably, thereby reducing the cost required for assembling the refrigerator as a whole.

[0006]

The refrigerator according to the present invention has the structure shown in FIG.
As shown in FIG. 1, a freezer compartment 4 and a refrigeration compartment 5 are arranged adjacent to each other through a partition wall 6 inside the refrigerator main body 1.
Doors 9.9 that open and close the entrances 7.8 of FIG.
), And the opening peripheral walls 13 of both entrances 7 and 8
In addition, heaters 14 and 15 for preventing condensation are arranged.
Heater 14 for freezer compartment 4 and heater 1 for refrigerator compartment 5
5 is connected in series via a connection cord 19. One of the power supply lines 20 to both heaters 14 and 15 is connected to the heater 14 for the freezer compartment 4, and the other power supply line is connected to the heater 15 for the refrigerator compartment 5.

More specifically, each of the heaters 14 and 15 is composed of three linear heater units 16 and 17 disposed along the opening sides of the entrances and exits 7 and 8, and each of the heater units 16 and 17. At the corner portion. The heater 14 for the freezer compartment 4 and the heater 15 for the refrigerating compartment 5 are connected in series via a connection cord 19 at one of the upper side and the lower side of the entrances 7 and 8, and at the remaining side. ,
A power supply line 20 is led out from the ends of both heaters 14 and 15.

[0008]

The heater 14 for the freezer compartment 4 and the heater 15 for the refrigerator compartment 5 are connected in series via the connection cord 19, so that the heater for preventing dew condensation is unified, and the power supply line 20 is further connected. Can be reduced. Therefore, the labor required for assembling can be reduced, and the room for erroneous wiring and assembling errors can be significantly reduced. For example, when the feeder line 20 is connected to the heaters 14 and 15 at the upper sides of the entrances 7 and 8 and both heaters 14 and 15 are connected in series by the connection cord 19 at the lower side, the length of the feeder line 20 is constant. And the length of the wiring to the connection terminal on the power supply side can be minimized.

[0009]

1 to 3 show an embodiment in which the present invention is applied to a commercial undercounter type refrigerator-freezer. FIG.
, The refrigerator main body 1 is formed in a horizontally long rectangular box shape with an open front surface, a machine room 2 for accommodating devices such as a refrigerator and a blower fan is provided on one side thereof, and a cooking table is provided above the refrigerator main body 1. A top plate 3 also serving as a top plate is arranged. A freezer compartment 4 and a refrigerating compartment 5 are provided adjacent to the left and right inside the main body adjacent to the machine room 2. The two compartments 4.5 are separated by a partition wall 6, and the entrances 7 and 8 can be opened and closed by a pair of left and right double doors 9 respectively. The swinging tip of the door 9 is received by a support 10 at the front end of the partition wall 6. FIG. 1 shows the refrigerator body 1 in a state where the door 9 and door hinges are omitted.

As shown in FIG. 2, a packing 12 provided on the inner surface of the door 9 is received by an opening peripheral wall 13 of the doorway 7,8 to seal each of the chambers 4,5, so that cold air and outside air can enter and exit the refrigerator. To block. When the door is closed, the doorway 7
The peripheral wall 13 of the opening 8 is cooled by cold air in the refrigerator and becomes low temperature. In particular, when the opening peripheral wall 13 is formed of a stainless steel plate, it is inevitable that the temperature of the opening peripheral wall 13 becomes low. For this reason, moisture in the air condenses on the opening peripheral wall 13 and dew condensation easily occurs. In some cases, the condensed water solidifies and grows like frost. In order to eliminate such dew or frost, the heaters 14 and 15 are arranged in a state of being buried in the inner surface of the opening peripheral wall 13 of the entrances 7 and 8.

In FIG. 1, on the side of the entrance 7 of the freezer compartment 4, the heater 1 extends along the opening peripheral wall 13 excluding the column 10.
4 is arranged. On the entrance 8 side of the refrigerator compartment 5, a heater 15 is arranged along the opening peripheral wall 13 excluding the support pillar 10.
The two heaters 14 and 15 are respectively composed of three linear heater units 16 and 17 arranged along the upper side, side and lower sides of the entrances and exits 7 and 8, and each of the heater units 16 and 17.
17 is composed of a corner cord 18 connected at a corner portion. However, since the amount of cold heat in the freezer compartment 4 is large, the heat generation capacity of the former heater 14 is reduced by the latter heater 15.
Is set to about twice the capacity of A heater for preventing dew condensation is separately provided inside the column 10.

In order to simplify the assembly of the heaters 14 and 15 to the refrigerator body 1, both heaters 14 and 15 are previously connected in series with a connection cord 19 and integrated.
The heaters 14 and 15 integrated in this manner have no room for erroneous wiring, for example, by assembling the heater units 16 and 17 in a one-stroke sequence with the upper side of the entrance 7 of the freezing room 4 as a starting end. Can be assembled in a state. Since the pair of heaters 14 and 15 are connected in series, only one set of power supply lines 20 is required.
Reference numeral 0 denotes a heater unit 16 for the freezer compartment 4 located on the upper side of the entrances 7 and 8 and a heater unit 1 for the refrigerator compartment 5.
7 is connected to the opposite end. Furthermore, it is arranged inside the cabin 2 using the space under the top plate 3 and connected to the connection terminal on the power supply side.

FIG. 3 is a circuit diagram showing a case where both heaters 14 and 15 are connected in series and a case where they are connected in parallel. As can be understood from these, when the heaters 14 and 15 are connected in series, the combined resistance increases as compared with the case where both heaters 14 and 15 having the same resistance are connected in parallel, so that the current value decreases. Therefore, the capacities of both heaters 14 and 15 are increased so that the heat generation amounts are the same as in the case where they are connected in parallel. Alternatively, a heater 14 having a large heating value and a small resistance value.
15 to maintain the required heating temperature,
3 prevents the formation of dew and frost on the surface of 3.

In the above embodiment, the heater buried inside the column 10 is separately assembled. However, as shown in FIG.
15 and can be arranged in a one-stroke form. The heater 22 is a heater unit 17 on the side of the refrigerator compartment 5.
Are connected in series via a connection cord 19, and one feeder line 20 is led out from the upper end thereof. The other power supply line 20 extends from an end of the heater unit 16 along the lower side of the entrance 7 for the freezer compartment 4.

In addition to the above, the present invention can also be applied to a vertical refrigerator-freezer in which a freezer compartment 4 and a refrigerating compartment 5 are vertically arranged adjacent to each other. The heaters 14 and 15 can be arranged on the surface of the opening peripheral wall 13 and can be of any type such as a linear heater and a planar heater.

[0016]

According to the refrigerator of the present invention, the heater 14 for the freezer compartment 4 and the heater 15 for the refrigerating compartment 5 provided to prevent dew condensation are connected in series to be integrated. Wiring can be prevented, and both heaters 14 and 15
By reducing the number of power supply lines 20 to one set, the wiring configuration of the heaters 14 and 15 and the power supply line 20 can be simplified as a whole, and the labor required for assembling them can be reduced. Therefore, as compared with the conventional example in which the two heaters 14 and 15 connected in parallel need to be individually assembled, the heaters 14 and 15 can be assembled quickly without error, and the cost required for assembly as a whole can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a refrigerator with a door removed.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is an electric circuit diagram conceptually showing an arrangement of heaters.

FIG. 4 is a front view of a refrigerator showing another embodiment.

FIG. 5 is a front view of a conventional refrigerator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Refrigerator main body 4 Freezer room 5 Refrigerator room 7.8 Doorway 9 Door 14.15 Heater 19 Connection cord 20 Power supply line

Claims (2)

[Claims] 1. A refrigerator room 4 and a refrigerator room 5 are arranged adjacent to each other via a partition wall 6 inside a refrigerator body 1.
5 is provided with doors 9.9 for opening and closing the entrances 7.8 of the respective doors 5 and heaters 14 and 15 for preventing dew condensation are disposed on the peripheral wall 13 of the openings of the entrances 7.8. Heater 14 for room 4 and heater 1 for refrigerator 5
5 is connected in series via a connection cord 19, one of the power supply lines 20 to both heaters 14 and 15 is connected to the heater 14 for the freezer compartment 4, and the other power supply line is connected to the refrigerator compartment 5. A refrigerator with a heater for preventing dew condensation connected to the heater 15 of FIG. 2. Each of the heaters 14 and 15 includes three linear heater units 16 and 17 arranged along the opening sides of the entrances and exits 7 and 8;
A heater 14 for the freezer compartment 4 and a heater 1 for the refrigerator compartment 5.
5 are connected in series at one of the upper side and the lower side of the entrances 7 and 8 via the connection cord 19, and the feeder line 20 is led out from the ends of the heaters 14 and 15 at the remaining side. The refrigerator with a heater for preventing dew condensation according to claim 1.