KR100526603B1 - Refrigerator and defrosting controlling method for its refrigerator - Google Patents

Abstract

The present invention relates to a refrigerator and a defrosting control method of the refrigerator. Among these, a refrigerator having a main body to form at least one cooling chamber therein, and a compressor and a condenser provided in the main body, the refrigerant pipe disposed in the first space behind the main body and connected from the compressor and the condenser An evaporator provided; A defrost heater provided in the evaporator and defrosting possible defrost in the evaporator; A rear duct member disposed at one side of the evaporator facing the cooling chamber and spaced apart from upper and lower walls of the main body, respectively; A front duct member disposed at a front side with a predetermined distance from the rear duct member to form a second space together with the rear duct member, and both ends spaced apart from upper and lower walls of the main body, respectively; It is rotatably provided at both ends of the front duct member so that the flow of air flowing in the first and second spaces and the cooling chamber is based on the relative on / off operation of the compressor and the defrost heater. It characterized in that it comprises a plurality of selectively variable dampers.

As a result, uniform defrosting and efficiency defrosting can be performed instead of shorter defrosting time, while the air surrounding the evaporator heated by the defrosting is prevented from entering the cooling chamber to reduce power consumption due to frequent operation of the refrigeration cycle. By doing so, the food stored in the cooling chamber can be kept fresh longer.

Description

Refrigerator and defrosting controlling method for its refrigerator}

The present invention relates to a refrigerator and a defrost control method of the refrigerator, and more particularly, to a refrigerator and a defrost control method of the refrigerator having an improved defrost structure for the evaporator.

Generally, a refrigerator has a main body having at least one cooling chamber formed therein, and a door provided at the front of the main body to open and close the cooling chamber. The main body is provided with a refrigeration cycle for cooling the inside of the cooling chamber having a configuration such as a compressor, a condenser, an expansion valve, and an evaporator.

Therefore, the refrigerant is compressed to a high temperature and high pressure in the compressor and then sent to the condenser, and the condenser changes the compressed refrigerant into a liquid phase. Then, the refrigerant is expanded through the expansion valve, and then vaporized in the evaporator to form cold air by using the latent heat of the surroundings. When cold air is formed through the evaporator, the cold air is blown into the cooling chamber by the blowing fan, and thus the cooling chamber may be cooled to a predetermined temperature.

On the other hand, while the refrigeration cycle for generating cold air is repeatedly driven as described above, the evaporator forming the cold air is generated by the difference between the temperature of the evaporator itself and the ambient temperature. When defrost occurs on the evaporator, the evaporator efficiency is reduced as much as the generated defrost, so the refrigerator has a structure for defrosting the generated defrost.

10 is a schematic view of a conventional evaporator region. As shown in this figure, the rear wall 110a of the main body 110 is provided with a duct member 131 which forms a space therein together with the rear wall 110a for the flow of cold air. The upper and lower portions of the duct member 131 are open.

In the space formed by the duct member 131, the evaporator 125 is mounted as a configuration of the refrigeration cycle. The evaporator 125 is provided with a refrigerant pipe 125a connected to a compressor, a condenser, and an expansion valve (not shown), and a defrost heater 127 connected to a separate defrost heater 127 to defrost the evaporator 125 is integrated. It is provided with. The blower fan 142 for blowing the cool air formed by the evaporator 125 to the cooling chamber 114 is provided in the upper part of the evaporator 125. As shown in FIG. The blowing fan 142 operates only in one direction for blowing cold air into the cooling chamber 114.

As described above, when the refrigeration cycle is driven and the refrigerant flows into the refrigerant pipe 125a of the evaporator 125 through the compressor, the condenser and the expansion valve, the evaporator 125 vaporizes. At this time, relatively hot air in the cooling chamber 114 flows into the refrigerant pipe 125a area of the evaporator 125 through the lower open area of the duct member 131 and is cooled. Then, the cold air cooled by the evaporator 125 is blown to the cooling chamber 114 through the upper open area of the duct member 131 by the blowing fan 142 provided on the upper part of the evaporator 125.

When the frost is formed on the evaporator 125 by the difference between the high temperature in the cooling chamber 114 and the low temperature of the evaporator 125 while the refrigeration cycle is repeatedly driven, the driving of the refrigeration cycle is stopped, that is, the compressor and the blowing air. The operation of the fan 142 is stopped and the defrost heater 127 is operated.

When the defrost heater 127 is operated, the hot heat from the defrost heater 127 is conducted from the bottom of the evaporator 125 to the upper side to defrost the frost formed in the evaporator 125. That is, the hot air related to the defrost of the evaporator 125 defrosts the evaporator 125 one by one while gradually rising upward by natural convection, and then back to the cooling chamber 114 through the upper open area of the duct member 131. Exit

However, in the conventional refrigerator, as described above, since defrosting of the evaporator 125 is performed by conduction and natural convection, the defrosting time is substantially long, and uniform defrosting and efficiency defrosting of the evaporator 125 are performed. Can not be realized.

In addition, the longer the defrost time is, the longer the consumption input becomes, and since a large amount of air around the evaporator 125 heated by defrost is introduced into the cooling chamber 114, the cooling chamber during defrost of the evaporator 125 ( 114) the temperature inevitably rises. As such, when the temperature of the cooling chamber 114 rises due to the defrost of the evaporator 125, the refrigeration cycle must be frequently operated because food stored in the cooling chamber 114 cannot be kept fresh longer. Therefore, there is a problem that the power consumption increases.

Accordingly, the uniform defrosting and the efficiency defrosting can be performed instead of shortening the defrosting time, while preventing the air around the evaporator 125 heated by the defrosting from being introduced into the cooling chamber 114 to prevent frequent operation of the refrigeration cycle. It is necessary to develop a technology to keep the food stored in the cooling chamber 114 fresher longer by reducing power consumption.

Accordingly, it is an object of the present invention to allow uniform defrosting and efficient defrosting to take place instead of shortening the defrosting time, while preventing the air around the evaporator heated by the defrosting from being introduced into the cooling chamber for frequent operation of the refrigeration cycle. It is to provide a defrosting control method of the refrigerator and the freezer to keep the food stored in the cooling chamber more fresh for a long time by reducing the power consumption.

The object of the present invention is a refrigerator having a main body which forms at least one cooling chamber therein and a compressor and a condenser provided in the main body, the object being disposed in a rear first space of the main body and having the compressor and the An evaporator having a refrigerant pipe connected from the condenser; A defrost heater provided in the evaporator and defrosting possible defrost in the evaporator; A rear duct member disposed at one side of the evaporator facing the cooling chamber and spaced apart from upper and lower walls of the main body, respectively; A front duct member disposed at a front side with a predetermined distance from the rear duct member to form a second space together with the rear duct member, and both ends spaced apart from upper and lower walls of the main body, respectively; It is rotatably provided at both ends of the front duct member so that the flow of air flowing in the first and second spaces and the cooling chamber is based on the relative on / off operation of the compressor and the defrost heater. It is achieved by a refrigerator, characterized in that it comprises a plurality of selectively variable dampers.

Here, the upper part of the evaporator, the first space is provided with a blower fan capable of forward and reverse rotation to select and supply air in the first space to any one of the evaporator and the cooling chamber.

A first temperature sensor provided in the cooling chamber and measuring a temperature in the cooling chamber; A second temperature sensor provided at one side of the first and second spaces and measuring a temperature in the first and second spaces; The controller may further include a control unit configured to control the operation of the compressor, the blowing fan, the defrost heater, and the damper based on the signals of the first and second temperature sensors.

In the normal operation for cooling the cooling chamber, the compressor and the blower fan are turned on, the defrost heater is turned off, and the plurality of dampers respectively shield both ends of the front and rear duct members. The cold air generated by the evaporator circulates into the first space and the cooling chamber by the blowing fan.

In the defrosting operation for defrosting the evaporator, the defrost heater and the blower fan are turned on, the compressor is turned off, and the plurality of dampers are provided at both ends of the front duct member and the upper and lower walls of the main body. Each of the shields is forced to circulate into the first space and the second space by the blowing fan.

After the defrosting of the evaporator is completed, in the post-defrost cooling operation for cooling only the first and second spaces, the compressor and the blower fan are turned on, the defrost heater is turned off, and the plurality of dampers. Cooling air generated by the evaporator is forcibly circulated to the first space and the second space by the blower fan by shielding both ends of the front duct member and the upper and lower walls of the main body, respectively.

On the other hand, according to the present invention, in the refrigerator having a main body for forming at least one cooling chamber therein, and a compressor and a condenser provided in the main body, the object is disposed in the rear first space of the main body and the compressor An evaporator having a refrigerant pipe connected from the condenser; A rear duct member disposed at one side of the evaporator facing the cooling chamber and spaced apart from upper and lower walls of the main body, respectively; A front duct member disposed at a front side with a predetermined distance from the rear duct member to form a second space together with the rear duct member, and both ends spaced apart from upper and lower walls of the main body, respectively; A defrost heater provided in a second space between the front and rear duct members to defrost possible defrost in the evaporator; It is rotatably provided at both ends of the front duct member so that the flow of air flowing in the first and second spaces and the cooling chamber is based on the relative on / off operation of the compressor and the defrost heater. It is also achieved by a refrigerator comprising a plurality of dampers which are optionally variable.

Here, the upper part of the evaporator, the first space is provided with a blower fan capable of forward and reverse rotation to select and supply air in the first space to any one of the evaporator and the cooling chamber.

A first temperature sensor provided in the cooling chamber and measuring a temperature in the cooling chamber; A second temperature sensor provided at one side of the first and second spaces and measuring a temperature in the first and second spaces; The controller may further include a control unit configured to control the operation of the compressor, the blowing fan, the defrost heater, and the damper based on the signals of the first and second temperature sensors.

In the normal operation for cooling the cooling chamber, the compressor and the blower fan are turned on, the defrost heater is turned off, and the plurality of dampers respectively shield both ends of the front and rear duct members. The cold air generated by the evaporator circulates into the first space and the cooling chamber by the blowing fan.

In the defrosting operation for defrosting the evaporator, the defrost heater and the blower fan are turned on, the compressor is turned off, and the plurality of dampers are provided at both ends of the front duct member and the upper and lower walls of the main body. Each of the shields is forced to circulate into the first space and the second space by the blowing fan.

After the defrosting of the evaporator is completed, in the post-defrost cooling operation for cooling only the first and second spaces, the compressor and the blower fan are turned on, the defrost heater is turned off, and the plurality of dampers. Cooling air generated by the evaporator is forcibly circulated to the first space and the second space by the blower fan by shielding both ends of the front duct member and the upper and lower walls of the main body, respectively.

On the other hand, according to another field of the present invention, the above object, according to the present invention, in the defrost control method of the refrigerator having any one of the configuration of claim 1, to determine whether the defrost of the evaporator occurs A first step; A second step of defrosting the evaporator when the defrost occurs in the evaporator by changing the flow path of the damper and operating the defrost heater and the blower fan to force circulation of the defrost heater to the first and second spaces. It is also achieved by the defrost control method of the refrigerator comprising a.

Here, after the second step is finished, measuring the temperature (T1) of the cooling chamber; Measuring a temperature T2 in the first and second spaces of the evaporator region; On the basis of the measured temperature relationship between the T1 and T2 it is advantageous to further comprise the step of performing a post-defrost cooling operation for the cooling of the first and second space only or the general control of the refrigerator.

Hereinafter, each embodiment of the present invention will be described in detail with reference to the accompanying drawings, and in the description of each embodiment, the same reference numerals will be given to the same components.

For reference, the cooling chamber described in the claims below refers to the freezer compartment and the refrigerating compartment. Therefore, if only one of the freezer compartment or the refrigerating chamber is formed by using the example of the small refrigerator to convey the spirit of the present invention, it will be expressed as a "cooling chamber".

However, in the present embodiment, the present invention will be described using the refrigerator of FIG. 1 which is commonly seen in the surroundings. In the following description, what is commonly referred to as a "cold room" will be described as a "cooling room".

First embodiment

1 is a perspective view of a refrigerator according to a first embodiment of the present invention. As shown in the figure, the refrigerator according to the first embodiment of the present invention, the main body 10 is formed with the freezing chamber 12 and the cooling chamber 14 in the vertical direction, and the front side of the main body 10 Each of them has a freezing chamber door 16 and a cooling chamber door 18 that are rotatably coupled to each other to rotate the freezing chamber 12 and the cooling chamber 14.

In the freezing chamber 12, a freezing chamber shelf 13 for storing food and articles is provided. A plurality of cooling chamber shelves 15 are also provided in the cooling chamber 14 along the vertical direction. The vegetable compartment 19 is provided in the lower part of the cooling chamber shelf 15. And inside the cooling chamber 14, the 1st temperature sensor 23 (refer FIG. 8) which measures the temperature in the cooling chamber 14 is provided.

The main body 10 is provided with a refrigeration cycle for cooling the inside of the cooling chamber 14 having a configuration such as a compressor 24 (see FIG. 8), a condenser (not shown), an expansion valve (not shown), and an evaporator 25. have. The evaporator 25 will be described in detail below, but the configuration of the compressor 24, the condenser and the expansion valve is to be replaced by conventional refrigeration cycle configuration and operation.

FIG. 2 is a view schematically illustrating an evaporator region of the refrigerator illustrated in FIG. 1 and schematically illustrating a process of forming cold air by an evaporator, and FIG. 3 is a view illustrating a process of defrosting an evaporator in FIG. 2. 4 is a view illustrating a process of cooling the evaporator region in FIG. 3.

2 to 4, the main body 10 in the region where the evaporator 25 is installed is roughly " c " consisting of a rear wall 10a, an upper wall 10b and a lower wall 10c, depending on its position. It has the shape of a ruler. In the first space 21 adjacent to the rear wall 10a of the main body 10, an evaporator 25 that is in charge of one configuration of the refrigeration cycle is provided.

The evaporator 25 employed in the first embodiment uses the same one as the evaporator 125 (refer to FIG. 10) described in FIG. 10. In other words, a refrigerant pipe 25a connected to the compressor 24, a condenser, and an expansion valve, and an evaporator 25 in which a defrost heater 27 is integrally formed under the refrigerant pipe 25a are employed.

A blowing fan 42 is mounted above the evaporator 25 in the first space 21. The blower fan 42 employed in this embodiment is different from the conventional one, and employs a fan which can rotate in the forward and reverse directions by a motor (not shown).

Therefore, the air in the 1st space 21 can be selected and supplied to either one of the evaporator 25 side and the cooling chamber 14 side. In the first space 21 adjacent to the blowing fan 42, a second temperature sensor 44 for measuring the temperature in the first and second spaces 21 and 22 is provided.

One side of the evaporator 25 facing the cooling chamber 14 is provided with a rear duct member 31 having both ends 31a and 31b spaced apart from the upper and lower walls 10b and 10c of the main body 10, respectively. The front duct member 32 is spaced apart from the rear duct member 31 with both ends 32a and 32b spaced apart from the upper and lower walls 10b and 10c of the main body 10, respectively. ) Is provided. Accordingly, a second space 22 is formed between the front and rear duct members 32 and 31.

On the other hand, both ends 32a and 32b of the front duct member 32 are provided with a plurality of dampers 40 rotatably coupled to both ends 32a and 32b of the front duct member 32 on one side. The plurality of dampers 40 may include the first and second spaces 21 and 22 and the cooling chamber based on the relative on / off operations of the compressor 24, the blowing fan 42, and the defrost heater 27. (14) serves to selectively vary the flow of air flowing within. At this time, the plurality of dampers 40 should be driven by a separate damper driver based on the signal of the controller 45, but the configuration of the damper driver will not be described separately.

In the case of the normal operation for cooling the cooling chamber 14 in the refrigerator having such a configuration (see FIG. 2), and in the case of the defrosting operation for defrosting the evaporator 25 (see FIG. 3), the defrost of the evaporator 25 After the completion of the defrosting cooling operation (see FIG. 4) for cooling only the first and second spaces 21 and 22 after completion is described with reference to the drawings, respectively.

In the case of normal operation for cooling the cooling chamber 14, the process of FIG. That is, the compressor 24 and the blower fan 42 are turned on by the controller 45 (see FIG. 8) and the defrost heater 27 is turned off. The plurality of dampers 40 shield both ends 31a, 32a, 31b, and 32b of the front and rear duct members 32 and 31, respectively, to prevent cold air from flowing into the second space 22.

In this state, when the refrigerant is circulated to the compressor 24 and the condenser and flows into the refrigerant pipe 25a of the evaporator 25, the evaporator 25 is vaporized. At this time, the air in the cooling chamber 14 is forward and backward duct members. Passed through the lower open area of the 32 and 31, respectively, is introduced into the evaporator 25 and cooled in the evaporator 25. Then, the cooled cold air is blown into the cooling chamber 14 after passing through the upper open areas of the front and rear duct members 32 and 31, respectively, by the blowing fan 42 provided on the upper part of the evaporator 25. .

As a result, in the state as shown in Fig. 2, the plurality of dampers 40 shield the both ends 31a, 32a, 31b, and 32b of the front and rear duct members 32 and 31, respectively, so that the cold air formed in the evaporator 25 is blown. The fan 42 circulates into the first space 21 and the cooling chamber 14.

When the frost is formed on the evaporator 25 by the temperature difference between the temperature in the cooling chamber 14 and the evaporator 25 while the refrigeration cycle is repeatedly driven as described above, the defrosting operation of the evaporator 25 is performed through the process shown in FIG. 3. This is done. As shown in FIG. 3, the defrost heater 27 and the blowing fan 42 are turned on by the controller 45 and the compressor 24 is turned off.

In addition, the plurality of dampers 40 shield the upper and lower walls 10b and 10c of the front end duct member 32 and the upper and lower walls 10b and 10c of the main body 10, respectively. 22) between the cooling chamber (14).

In this state, the hot heat generated from the defrost heater 27 rises upward from the bottom of the evaporator 25 and defrosts the frost formed in the evaporator 25. At this time, unlike the related art, the blower fan 42 To force circulation of heat. That is, the heat generated by the defrost heater 27 defrosts the evaporator 25 while forcibly circulating to the first space 21 and the second space 22 by the blowing fan 42.

Therefore, unlike the conventional natural convection, the evaporator 25 can be defrosted uniformly and efficiently, instead of shortening the defrosting time. In addition, since the plurality of dampers 40 block the space between the first and second spaces 21 and 22 and the cooling chamber 14, the air around the evaporator 25 heated by the defrost is cooled in the cooling chamber 14. Can prevent entry into the vessel. Therefore, by reducing the power consumption according to the frequent operation of the refrigeration cycle it is possible to keep the food stored in the cooling chamber 14 fresher longer.

After the defrosting of the evaporator 25 is completed, the temperature in the first and second spaces 21 and 22 is actually much higher than the temperature in the cooling chamber 14. In this state, when the damper 40 is driven to communicate the first and second spaces 21 and 22 with the cooling chamber 14, the temperature in the cooling chamber 14 may suddenly rise, and thus there is a fresh storage of food. It is disadvantageous.

Thus, in the first embodiment, as shown in FIG. 4, after the defrost of the evaporator 25 is completed, the post-defrost cooling operation for cooling only the first and second spaces 21 and 22 is performed. As shown in FIG. 4, the compressor 24 and the blower fan 42 are turned on by the controller 45, and the defrost heater 27 is turned off.

In addition, the plurality of dampers 40 shield the upper and lower walls 10b and 10c of the front end duct member 32 and the upper and lower walls 10b and 10c of the main body 10, respectively. 22) between the cooling chamber (14). In this state, when the refrigerant is circulated to the compressor 24 and the condenser and flows into the refrigerant pipe 25a of the evaporator 25, the coolant is generated while evaporating in the evaporator 25.

The generated cold air is forcedly circulated from the first space 21 to the second space 22 formed between the front and rear duct members 32 and 31 by the blowing fan 42 provided on the evaporator 25. Go through

On the other hand, while the process as shown in Figure 4, the first temperature sensor 23 measures the temperature in the cooling chamber 14 and sends it to the control unit 45, the second temperature sensor 44 is the first and second space The temperature in (21, 22) is detected and sent to the control part 45.

The controller 45 compares these temperatures with each other and continuously turns on the compressor 24 until the temperature values in the first and second spaces 21 and 22 become relatively lower than the temperature values in the cooling chamber 14. Cooling after the defrost for cooling only the first and second spaces 21 and 22 is continued.

Of course, when the cooling in the first and second spaces 21 and 22 is completed and the temperature values in the first and second spaces 21 and 22 are relatively lower than the temperature in the cooling chamber 14, the process of FIG. Is stopped and cycled to the process of FIG. 2 described above based on the predetermined signal.

As described above, according to the first embodiment of the present invention, the air around the evaporator 25 heated by the defrost is introduced into the cooling chamber 14 while allowing uniform defrosting and efficient defrosting instead of shortening the defrosting time. By preventing the inflow to reduce the power consumption according to the frequent driving of the refrigeration cycle there is an effect that can keep the food stored in the cooling chamber 14 fresher longer.

Second embodiment

FIG. 5 is a view schematically illustrating an evaporator region of a refrigerator according to a second embodiment of the present invention, which schematically illustrates a process of forming cold air by an evaporator, and FIG. 6 is a process of defrosting an evaporator in FIG. 5. FIG. 7 is a view illustrating a process of cooling the evaporator region in FIG. 5.

Looking at these drawings, a configuration different from that of the first embodiment described above exists. That is, in the first embodiment, the defrost heater 27 is integrally provided in the evaporator 25, whereas in the second embodiment, the defrost heater 27 has a second space between the front and rear duct members 32 and 31. It is provided in 22, and the evaporator 25 is defrosted.

In view of this, in the case of the normal operation for the general cooling of the cooling chamber 14 (see FIG. 5), in the case of the defrosting operation for the defrost of the evaporator 25 (see FIG. 6), the defrost of the evaporator 25 is performed. After the completion of the defrosting cooling operation (see FIG. 7) for cooling only the first and second spaces 21 and 22 will be described with reference to the drawings, respectively.

In the case of normal operation for cooling the cooling chamber 14, the process of FIG. That is, the compressor 24 and the blower fan 42 are turned on by the controller 45 (see FIG. 8) and the defrost heater 27 is turned off. The plurality of dampers 40 shield both ends 31a, 32a, 31b, and 32b of the front and rear duct members 32 and 31, respectively, to prevent cold air from flowing into the second space 22.

In this state, when the refrigerant is circulated to the compressor 24 and the condenser and flows into the refrigerant pipe 25a of the evaporator 25, the evaporator 25 vaporizes, whereby the air in the cooling chamber 14 is forward and backward ducts. Passed through the lower open area of the members (32, 31), respectively, enters the evaporator 25 and is cooled in the evaporator (25). Then, the cooled cold air is blown into the cooling chamber 14 after passing through the upper open areas of the front and rear duct members 32 and 31, respectively, by the blowing fan 42 provided on the upper part of the evaporator 25. .

As a result, in the state as shown in Fig. 5, the plurality of dampers 40 shield the both ends 31a, 32a, 31b, and 32b of the front and rear duct members 32 and 31, respectively, so that the cold air formed in the evaporator 25 is blown. The fan 42 circulates into the first space 21 and the cooling chamber 14.

If defrost is formed on the evaporator 25 while the refrigeration cycle is repeatedly driven as described above, the defrosting operation of the evaporator 25 is performed through the process illustrated in FIG. 6. As illustrated in FIG. 6, the defrost heater 27 and the blowing fan 42 are turned on by the controller 45 and the compressor 24 is turned off. In addition, the plurality of dampers 40 shield the upper and lower walls 10b and 10c of the front end duct member 32 and the upper and lower walls 10b and 10c of the main body 10, respectively. 22) between the cooling chamber (14).

The hot air generated in the defrost heater 27 is different from the conventional blow fan 42 is operating, the heat from the defrost heater 27 is transferred to the first space 21 through the second space (22). The evaporator 25 is defrosted while being forced by circulation. Of course, if the blowing fan 42 reversely rotates, hot heat from the second space 22 is directed to the evaporator 25 via the blowing fan 42 through the upper opening area of the rear duct member 31, and the evaporator. Air defrosting 25 may be re-introduced into the second space 22 through the lower open area of the rear duct member 31 and the temperature may be raised again.

Therefore, unlike the conventional natural convection, the evaporator 25 can be defrosted uniformly and efficiently, instead of shortening the defrosting time. In addition, since the plurality of dampers 40 block the space between the first and second spaces 21 and 22 and the cooling chamber 14, the air around the evaporator 25 heated by the defrost is cooled in the cooling chamber 14. Can prevent entry into the vessel. Therefore, by reducing the power consumption according to the frequent operation of the refrigeration cycle it is possible to keep the food stored in the cooling chamber 14 fresher longer.

After the defrosting of the evaporator 25 is completed, the temperature in the first and second spaces 21 and 22 is actually much higher than the temperature in the cooling chamber 14. When the first and second spaces 21 and 22 and the cooling chamber 14 communicate with each other in this state, the temperature in the cooling chamber 14 may rise suddenly.

Thus, in the second embodiment, as shown in Fig. 7, after the defrost of the evaporator 25 is completed, the post-defrost cooling operation for cooling only the first and second spaces 21 and 22 is performed. As illustrated in FIG. 7, the compressor 24 and the blower fan 42 are turned on by the controller 45, and the defrost heater 27 is turned off.

In addition, the plurality of dampers 40 shield the upper and lower walls 10b and 10c of the front end duct member 32 and the upper and lower walls 10b and 10c of the main body 10, respectively. 22) between the cooling chamber (14). In this state, when the refrigerant is circulated to the compressor 24 and the condenser and flows into the refrigerant pipe 25a of the evaporator 25, the coolant is generated while evaporating in the evaporator 25.

The generated cold air is forcedly circulated from the first space 21 to the second space 22 formed between the front and rear duct members 32 and 31 by the blowing fan 42 provided on the evaporator 25. Go through

In the meantime, the first temperature sensor 23 measures the temperature in the cooling chamber 14 and sends it to the controller 45 while the second temperature sensor 44 measures the first and second spaces. The temperature in (21, 22) is detected and sent to the control part 45.

The controller 45 compares these temperatures with each other and continuously turns on the compressor 24 until the temperature values in the first and second spaces 21 and 22 become relatively lower than the temperature values in the cooling chamber 14. After the defrosting, the cooling operation for cooling only the first and second spaces 21 and 22 is continued.

Of course, when the cooling in the first and second spaces 21 and 22 is completed and the temperature values in the first and second spaces 21 and 22 are relatively lower than the temperature in the cooling chamber 14, the process of FIG. Is stopped and cycled to the process of FIG. 5 described above based on the predetermined signal.

As described above, according to the second embodiment of the present invention, instead of shortening the defrosting time, uniform defrosting and efficient defrosting can be performed, while air around the evaporator 25 heated by the defrosting into the cooling chamber 14. By preventing the inflow to reduce the power consumption according to the frequent driving of the refrigeration cycle there is an effect that can keep the food stored in the cooling chamber 14 fresher longer.

Third embodiment

9 is a view showing a control algorithm as a third embodiment according to the defrost control of the refrigerator according to the present invention. Hereinafter, the process for the defrost control of the evaporator 25 will be described once again with reference to FIG. 9.

First, it is determined whether the evaporator 25 is sexually active (S11), and if defrost occurs, defrost is started (S12). That is, as shown in FIGS. 3 and 6 of the first and second embodiments, the plurality of dampers 40 are driven to change the air flow path (S13).

Then, the defrost heater 27 is operated (S14) and the blower fan 42 is operated (S15), so that the heat from the defrost heater 27 is forced to the first and second spaces 21 and 22. As a result, defrosting of the evaporator 25 is achieved.

When the defrost is completed (S16), the temperature (T1) inside the cooling chamber 14 is measured by the first temperature sensor 23 (S17), and then the first and second by the second temperature sensor 44. The temperature T2 in the spaces 21 and 22 is measured.

Then, the controller 45 determines the relationship between T1 and T2, and then drives the damper 40 when the temperature of T2 is lower than the temperature of T1 or the difference is within a predetermined set value ε (S19). By changing the flow path of the air (S20), it becomes the state of FIG. 2 and FIG. Of course, the process then proceeds to the normal refrigerator general control step (S21).

If, in step S19, the temperature of T2 is higher than the temperature of T1, the difference is out of a predetermined set value (ε) the compressor 24 is driven to complete the defrost of the evaporator 25, as shown in Figs. Thereafter, a post-defrost cooling operation for cooling only the first and second spaces 21 and 22 is performed.

As such, according to the present invention, the uniform defrosting and the efficient defrosting can be performed instead of shortening the defrosting time, while preventing the air around the evaporator 25 heated by the defrosting from being introduced into the cooling chamber 14. By reducing the power consumption according to the frequent operation of the refrigeration cycle it is possible to keep the food stored in the cooling chamber 14 fresher longer.

In the above embodiment, what is commonly called a refrigerating chamber has been described as a cooling chamber. On the contrary, the freezer compartment may be called a cooling chamber. 1, the refrigerator having a freezer compartment and a refrigerating compartment formed up and down has been described as an example, but the idea of the present invention can be used as it is in the left and right opening and closing refrigerators which are actively manufactured in recent years.

As described above, according to the present invention, it is possible to perform uniform defrosting and efficient defrosting instead of shortening the defrosting time, while preventing the air around the evaporator heated by the defrosting from being introduced into the cooling chamber, and thus the frequent refrigerating cycle. There is provided a refrigerator and a defrost control method of the refrigerator to reduce the power consumption according to the driving so that the food stored in the cooling chamber can be kept fresh longer.

1 is a perspective view of a refrigerator according to a first embodiment of the present invention,

FIG. 2 is a view schematically illustrating an evaporator region of the refrigerator illustrated in FIG. 1 and schematically illustrating a process of forming cold air by an evaporator.

3 is a view showing a process of defrosting the evaporator in FIG.

4 is a view illustrating a process of cooling an evaporator region in FIG. 3;

5 is a view schematically illustrating an evaporator region of a refrigerator according to a second embodiment of the present invention, which schematically illustrates a process of forming cold air by an evaporator;

6 is a view showing a process of defrosting the evaporator in FIG.

7 is a view illustrating a process of cooling an evaporator region in FIG. 5;

8 is a block diagram according to the defrost control of the refrigerator according to the present invention;

9 is a control algorithm according to a third embodiment of the defrost control of the refrigerator according to the present invention;

10 is a schematic view of a conventional evaporator region.

* Explanation of symbols for the main parts of the drawings

10: main body 14: cooling chamber

21: first space 22: second space

23: first temperature sensor 24: compressor

25: evaporator 27: defrost heater

31: rear duct member 32: front duct member

40: damper 42: blowing fan

44: second temperature sensor 45: control unit

Claims (14)

In the refrigerator having a main body to form at least one cooling chamber therein, and a compressor and a condenser provided in the main body, An evaporator disposed in a first rear space of the main body and having a refrigerant pipe connected from the compressor and the condenser; A defrost heater provided in the evaporator and defrosting possible defrost in the evaporator; A rear duct member disposed at one side of the evaporator facing the cooling chamber and spaced apart from upper and lower walls of the main body, respectively; A front duct member disposed at a front side with a predetermined distance from the rear duct member to form a second space together with the rear duct member, and both ends spaced apart from upper and lower walls of the main body, respectively; It is rotatably provided at both ends of the front duct member so that the flow of air flowing in the first and second spaces and the cooling chamber is based on the relative on / off operation of the compressor and the defrost heater. A refrigerator comprising a plurality of dampers that are selectively variable. The method of claim 1, And a blower fan capable of forward and reverse rotation to select and supply air in the first space to either one of the evaporator and the cooling chamber in the first space and the first space. The method of claim 1, A first temperature sensor provided in the cooling chamber and measuring a temperature in the cooling chamber; A second temperature sensor provided at one side of the first and second spaces and measuring a temperature in the first and second spaces; And a control unit controlling an operation of the compressor, the blower fan, the defrost heater, and the damper based on the signals of the first and second temperature sensors. The method according to any one of claims 1 to 3, In the normal operation for cooling the cooling chamber, the compressor and the blower fan are turned on, the defrost heater is turned off, and the plurality of dampers respectively shield both ends of the front and rear duct members. The cold air generated by the evaporator is circulated by the blowing fan to the first space and the cooling chamber. The method according to any one of claims 1 to 3, In the defrosting operation for defrosting the evaporator, the defrost heater and the blower fan are turned on, the compressor is turned off, and the plurality of dampers are provided at both ends of the front duct member and the upper and lower walls of the main body. Shielding each of the refrigerator by the defrost heater, characterized in that forcibly circulated to the first space and the second space by the blowing fan. The method according to any one of claims 1 to 3, After the defrosting of the evaporator is completed, in the post-defrost cooling operation for cooling only the first and second spaces, the compressor and the blower fan are turned on, the defrost heater is turned off, and the plurality of dampers. And the cold air generated by the evaporator is shielded at both ends of the front duct member and the upper and lower walls of the main body, respectively, and is forcedly circulated to the first space and the second space by the blowing fan. In the refrigerator having a main body to form at least one cooling chamber therein, and a compressor and a condenser provided in the main body, An evaporator disposed in a first rear space of the main body and having a refrigerant pipe connected from the compressor and the condenser; A rear duct member disposed at one side of the evaporator facing the cooling chamber and spaced apart from upper and lower walls of the main body, respectively; A front duct member disposed at a front side with a predetermined distance from the rear duct member to form a second space together with the rear duct member, and both ends spaced apart from upper and lower walls of the main body, respectively; A defrost heater provided in a second space between the front and rear duct members to defrost possible defrost in the evaporator; It is rotatably provided at both ends of the front duct member so that the flow of air flowing in the first and second spaces and the cooling chamber is based on the relative on / off operation of the compressor and the defrost heater. A refrigerator comprising a plurality of dampers that are selectively variable. The method of claim 7, wherein And a blower fan capable of forward and reverse rotation to select and supply air in the first space to either one of the evaporator and the cooling chamber in the first space and the first space. The method of claim 7, wherein A first temperature sensor provided in the cooling chamber and measuring a temperature in the cooling chamber; A second temperature sensor provided at one side of the first and second spaces and measuring a temperature in the first and second spaces; And a control unit controlling an operation of the compressor, the blower fan, the defrost heater, and the damper based on the signals of the first and second temperature sensors. The method according to any one of claims 7 to 9, In the normal operation for cooling the cooling chamber, the compressor and the blower fan are turned on, the defrost heater is turned off, and the plurality of dampers respectively shield both ends of the front and rear duct members. The cold air generated by the evaporator is circulated by the blowing fan to the first space and the cooling chamber. The method according to any one of claims 7 to 9, In the defrosting operation for defrosting the evaporator, the defrost heater and the blower fan are turned on, the compressor is turned off, and the plurality of dampers are provided at both ends of the front duct member and the upper and lower walls of the main body. Shielding each of the refrigerator by the defrost heater, characterized in that forcibly circulated to the first space and the second space by the blowing fan. The method according to any one of claims 7 to 9, After the defrosting of the evaporator is completed, in the post-defrost cooling operation for cooling only the first and second spaces, the compressor and the blower fan are turned on, the defrost heater is turned off, and the plurality of dampers. And the cold air generated by the evaporator is shielded at both ends of the front duct member and the upper and lower walls of the main body, respectively, and is forcedly circulated to the first space and the second space by the blowing fan. In the defrost control method of the refrigerator having any one of claims 1 to 7, A first step of determining whether defrost of the evaporator occurs; A second step of defrosting the evaporator when the defrost occurs in the evaporator by changing the flow path of the damper and operating the defrost heater and the blower fan by forced circulation of heat from the defrost heater to the first and second spaces. Defrost control method of a refrigerator comprising a. The method of claim 13, After the second step is finished, Measuring a temperature T1 of the cooling chamber; Measuring a temperature T2 in the first and second spaces of the evaporator region; Defrosting the refrigerator further comprising performing a cooling operation after defrost for cooling only the first and second spaces or performing general control of the refrigerator based on the measured temperature relationship between T1 and T2. Control method.