KR101445924B1 - Refrigerator - Google Patents

Abstract

An object of the present invention is to reduce the amount of electric power required for defrosting and defrost time by effectively utilizing the heat generated when the refrigerator is operated and discharged to the outside and the heat of the outside.
The refrigerator 1 has a refrigerating cycle including a refrigerating chamber 2 and freezing chambers 4 and 5 and a cooler 12 and a compressor 24 for generating cold air for cooling the refrigerating chamber and the freezing chamber. In addition, there are provided an internal fan 9 for blowing cool air generated in the cooler to at least one of the refrigerator compartment and the freezer compartment, an electric heater 22 disposed below the cooler, air having a temperature increased by flowing in the refrigerator compartment, And a control means 66 for controlling an antifreeze which stores heat of heat or outside air and a circulation pump 51 for circulating the internal fan or the antifreeze. During the defrosting operation, the control means heats the cooler by the air circulating through the refrigerating chamber and the heat of the compressor or the outside air until the cooler is heated by the heater.

Description

Refrigerator {REFRIGERATOR}

The present invention relates to a refrigerator, and more particularly, to a defrosting operation of a refrigerator.

An example of a conventional refrigerator is disclosed in Patent Document 1. In the refrigerator described in this publication, a heat absorber piped and connected to a cooler is installed in a non-freezing area (for example, a refrigerating room, a vegetable room, or a machine room). At the time of defrosting, the antifreeze filled in the heat absorber is circulated by the circulation pump and used as a heat source for the cooler. As a result, the amount of power consumption during the defrosting operation is reduced. In addition, a generally used electric heater (defrost heater) is omitted by using a heat source reserved in the heat absorber. Thereby, it is described that the defrosting in which the power consumption is reduced more than the conventional one can be carried out without temporarily increasing the temperature in the crucible remarkably.

Another example of a conventional refrigerator is described in Patent Document 2. In the refrigerator described in this publication, the heat radiator of the refrigeration cycle and the arrangement of the compressor motor are stored in the antifreeze and the oil, and the power consumption is reduced as compared with the case of using a conventional electric heater (defrost heater) have. The heat of the antifreeze and the oil is transferred to the cooler through the heat pipe or the circulation pump and is used for defrosting.

Another example of a conventional refrigerator is described in Patent Document 3. In the refrigerator described in this publication, in addition to the defrost heater generally used, the arrangement generated from the compressor during the operation period of the refrigeration cycle is reserved in the antifreezing liquid and used for removing the frost attached to the evaporator.

Japanese Patent Application Laid-Open No. 2009-92371 Japanese Patent Application Laid-Open No. 59-81479 Japanese Patent Application Laid-Open No. 11-23135

In the refrigerator described in Patent Document 1, a tank is provided in a non-freezing region for heating the frost (heating the cooler) with a small energy, and the energy required for defrosting the antifreeze filled in the tank is stored. This eliminates the need for an electric heater that has been conventionally used in defrosting, thereby enabling a significant reduction in the amount of power consumption. Here, the non-freezing region is, for example, a refrigerating room, a vegetable room, and a machine room (compressor installation portion). In the refrigerator described in this publication, since an antifreeze solution of 0 ° C or more is required to dissipate frost, it is necessary to provide a heat absorber filled with the antifreeze at a temperature zone of at least the freezing point.

However, the temperature of the refrigerating room or the vegetable room is about 5 ° C on average, so it is not easy to secure the amount of heat stored in the antifreeze, and it is difficult to obtain a sufficient amount of heat for melting the frost. For example, when a general brine (main component: ethylene glycol) is used as an antifreeze, the concentration is set to 70Wt% (freezing temperature is about -40 ° C), specific heat is 2.891kJ / (kgK), density is about 1110kg / If the amount of the antifreeze needed to dissolve frost 0.1 kg is estimated as the frost amount of the city, about 2 L is required at the minimum. Here, it is assumed that the amount of heat accumulated in the antifreeze is equivalent to the latent heat of melting of the frost. The amount of heat stored in the antifreeze is approximately 5 ° C at the room temperature in the refrigerating room or the vegetable room, so the temperature difference is estimated to be 5K as a difference from 0 ° C, which is the melting point of the frost.

This means that the space for storing the interior of the refrigerator is reduced by that amount (about 2L), so that the convenience is lowered in heating by using the antifreeze alone. Further, if the heat source necessary for defrosting can not be stored in the tank provided in the non-freezing region, the frost of the cooler can not be completely melted. Further, in a refrigerator having a refrigeration temperature range and a refrigeration temperature range, the defrosting time is also important, and if the defrosting time becomes long, the temperature rise of the freezing room becomes large and the preservability of the frozen food may be adversely affected. Thus, in the defrosting of the refrigerator, not only the amount of heat required but also the heat transfer phenomenon of the circulating antifreeze and cooler (or frost) becomes important. For example, when the temperature in the tank filled with the antifreeze drops during defrosting, the temperature difference between the frost and the frost becomes small, and the time until the frost melts becomes longer.

Further, in this patent document 1, there is no disclosure about reduction in the amount of power consumption when the cold energy of the frost that has grown on the cooler at the time of defrosting is effectively utilized. In addition, since only the heating means using the antifreeze is used, the time required for the defrosting becomes long if the congestion amount is large, and there is a fear that the temperature of the freezing chamber rises due to the stop of the freezing operation in the meantime. Therefore, the defrosting operation can not be performed in accordance with the implantation amount.

The frost mainly occurs in the cooler, but the frost sometimes grows in the vicinity of the air passage surface (solid wall surface) where the cooler is housed, for example, other than the cooler, or in the vicinity of the inward circulation fan. In the defrosting method using the antifreeze, since the direct cooler can be heated, the heat transfer performance between the heat source (antifreeze) and the frost attached to the cooler is improved. However, frost at a place apart from the cooler can not be expected to be effective by direct heating, and therefore, it is inevitably insufficient.

In the refrigerator described in Patent Document 2, the heat radiator in the refrigeration cycle and the arrangement from the compressor motor are stored in the antifreeze or oil and used during defrosting, as described in Patent Document 1. As a result, the conventional electric heater (defrost heater) is omitted and the amount of power consumption is reduced. However, since the refrigerator described in this publication has the same basic structure as that of the refrigerator described in Patent Document 1, there is a fear that a large tank is required or the defrosting time becomes long as described above.

In the refrigerator described in Patent Document 3, air around the evaporator is heated by natural convection to dissolve the frost, so that heat transfer is not necessarily promoted, which may require a long time for defrosting.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a refrigerator which effectively utilizes the heat generated when the refrigerator is operated and discharged to the outside and the heat of the outside, . It is also an object of the present invention to avoid the problem that the antifreeze used in the defrosting operation is frozen in the middle of the pipe, thereby enhancing the reliability of the refrigerator. It is still another object of the present invention to reduce the amount of power and defrost time used for defrosting without increasing the size of the tank for containing the antifreeze.

According to an aspect of the present invention, there is provided a refrigerator comprising: a refrigeration cycle having a refrigerator compartment and a freezer compartment, the refrigerator having a refrigerator and a compressor for generating cold air for cooling the refrigerator compartment and the freezer compartment; A second opening / closing means for opening / closing a flow path for guiding the cool air generated in the cooler to the freezing chamber, and a second opening / closing means for opening / closing the flow path of the cool air generated by the cooler to at least one of the refrigerating chamber and the freezing chamber. A first heating means disposed below the cooler and having an electric heater; and a second heating means including the first and second opening and closing means and the internal fan, wherein the cooler circulates the coolant chamber and heats the cooler The second heating means, and the piping and the antifreeze which are arranged in contact with the cooler and through which the antifreeze flows, A third heating means having a machine room fan for storing at least one of heat and outdoor heat generated in the compressor in a freezing liquid, a circulation pump for circulating the refrigerant, And a control means for controlling operations of the machine room fan and the first heating means. In the defrosting operation, the control means heats the cooler using at least one of the first to third heating means , And the refrigerating chamber is cooled by air circulating in the cooling section.

In this aspect of the invention, the control means activates the second and third heating means before the first heating means is activated during the defrosting operation. The control means may operate the first heating means after heating by the second heating means and the third heating means, and the second heating means may be a heating means for heating the inside air of the refrigerating temperature zone And the third heating means stores the heat of the positive temperature zone in the antifreeze and heat-transfers the antifreeze to the cooler. The defrosting sensor may be provided in the vicinity of the antifreezing outlet of the portion where the third heating means makes contact with the cooler. When the temperature detected by the defrosting sensor does not reach the predetermined temperature exceeding the freezing point within a predetermined time from the defrosting start The control means may cause the heating by the first heating means to be activated in addition to the heating by the second and third heating means.

In the above aspect, it is preferable that the defrosting sensor is provided in the vicinity of the antifreezing agent outlet of the portion where the third heating means contacts the cooler, and the control means determines that the temperature detected by the defrosting sensor exceeds the freezing temperature of the antifreezing liquid The second heating means defrosts the impregnation of the cooler from the outer surface side of the frother, and the third heating means deflects the frost of the cooler against the cooler It is preferable to perform defrosting from the surface side. It is also preferable that the control means operates the first opening / closing means so as to guide cool air generated by heating the frost attached to the cooler by the second heating means to the refrigerating chamber.

According to the present invention, since three kinds of heat sources, that is, the energy (defrost heater), the high-temperature thermal energy and the high-temperature thermal energy, are used at the time of defrosting the refrigerator, heat generated in the operation of the refrigerator, The amount of power required for defrosting and defrost time can be reduced. Further, by avoiding the problem that the antifreeze used for the defrosting operation is frozen in the middle of the pipe, the reliability of the refrigerator is improved. Further, the amount of electric power and defrost time used for defrosting can be reduced without increasing the size of the tank containing the antifreeze.

1 is a front view of an embodiment of a refrigerator according to the present invention;
Fig. 2 is a side elevation of a side view of the refrigerator shown in Fig. 1; Fig.
Fig. 3 is a side longitudinal sectional view of the refrigerator shown in Fig. 1, Fig. 2 and its width direction position.
Fig. 4 is a view of the periphery of the cooler provided in the refrigerator shown in Fig. 1, and is a cross-sectional side view of the refrigerator. Fig.
5 is a graph illustrating the amount of heat required for defrosting.
6 is a graph for explaining the amount of power required for defrosting.
7 is a time chart of an embodiment of the defrosting operation.
8 is a flowchart of the defrosting operation shown in Fig.
9 is a view for explaining a frost melting state in a cooler;
10 is a time chart of another embodiment of defrosting operation.
11 is a flowchart of the defrosting operation shown in Fig.
12 is a time chart of still another embodiment of the defrosting operation.
13 is a time chart of still another embodiment of the defrosting operation.
Fig. 14 is a flowchart of the defrosting operation shown in Fig. 13; Fig.

First, main features of a refrigerator according to the present invention will be described. The refrigerator (1) of the present invention defrosts by using three types of heat sources: first, electrical energy (defrost heater), second, high thermal energy, and third, high thermal energy. The defrosting by the first electrical energy is heating by a conventional electric heater (for example, a glass tube heater provided at the lower part of the cooler), but the shape of the defrosting is, as described in detail below, Which is different from the conventional one. The electric heater heats the air around the cooler and indirectly dissolves the frost through the air. In the second high-temperature thermal energy system, the air in the refrigerating chamber (including the vegetable chamber) kept at a positive temperature above the freezing point is circulated by using a high-temperature fan to dissolve the frost attached to the cooler. The high-temperature heat energy of the refrigerating compartment is, in other words, the energy that effectively utilizes the heat coming from the outside by riding on the wall surface of the refrigerating compartment as a heat source for defrosting. In the case of the third high-temperature thermal energy system, the heat of the compressor or the radiator installed in the high-temperature heat or the machine room is stored in the heat storage medium in the newly installed tank, and the heat is used at the time of defrosting.

As described in the above-mentioned Patent Documents 1 and 2, in order to obtain the amount of heat required for defrosting when the defrosting by the high thermal energy alone is performed, it is necessary to increase the antifreeze temperature (temperature at the time of storage) It is inevitable to increase the amount of heat, i.e., the amount of heating, by increasing the amount.

Since the defrosting of the refrigerator is usually once a day, if the tank filled with the antifreeze is installed outside the high temperature, if the antifreeze is not circulated within one day, which is the interval of defrosting, the temperature is equal to the outside air temperature (for example, 30 deg. It is possible to do. However, in order to raise the temperature of the antifreezing solution to a temperature higher than the high temperature, reuse (heat recovery) of heat radiated from the compressor or radiator is required. In addition, the defrosting by the third ultrahigh thermal energy alone causes problems such as the location of the tank filled with the antifreeze and the defrosting time. In order to solve these problems, the present invention has first, second, and third means as defrosting means, and by effectively combining these three means, it is possible to reduce the amount of power consumption during defrosting, The refrigerating room is cooled by reducing the input energy when using the cooling energy.

When the defrosting operation is performed after the rapid freezing to reach the freezing temperature of the antifreezing liquid, the temperature of the cooler becomes equal to or higher than the freezing temperature of the antifreezing liquid so that the antifreeze liquid storing the high thermal energy is not circulated below the freezing temperature. I have to. Therefore, it is possible to suppress the increase of the pump power, which is caused by the freezing point of the antifreeze being lowered, and the power consumption can be reduced. Also, the size of the antifreeze tank due to the reduction of the specific heat can be suppressed.

Hereinafter, one embodiment of the refrigerator according to the present invention will be described specifically with reference to the drawings. 1 is a front view of the refrigerator 1. Fig. The refrigerator 1 comprises a refrigerator compartment 2, an ice making compartment 3, an upper freezing compartment 4, a lower freezing compartment 5 and a vegetable compartment 6 from above. The ice making chamber 3, the upper freezing chamber 4, the lower freezing chamber 5, and the vegetables room 6 are provided with a draw- An upper freezing chamber door 4a, a lower freezing chamber door 5a, and a vegetable chamber door 6a. Hereinafter, the refrigerating chamber doors 2a, 2b, the ice making chamber door 3a, the upper freezing chamber door 4a, the lower freezing chamber door 5a and the vegetable chamber door 6a are simply referred to as doors 2a to 6a.

Further, the refrigerator 1 is provided with a door sensor (not shown) for detecting the opening and closing states of the doors 2a to 6a, respectively, and a door sensor for detecting the state of the door being opened for a predetermined time, for example, An unillustrated alarm notifying the user, and a temperature setting unit (not shown) for setting the temperature of the refrigerating chamber 2 or the freezing chamber 5, for example.

2 is a side sectional view of the refrigerator 1 shown in Fig. 1 (Fig. 2 (a)) and a longitudinal sectional view of the machine room 56 portion. As shown in Fig. 2 (a), the refrigerators 1 are separated from each other by the heat insulating housing 10 formed by filling the foam insulating material. A plurality of vacuum insulators (25) are mounted on the heat insulating housing (10) of the refrigerator (1). The hearth is partitioned by the refrigerating chamber 2, the upper freezing chamber 4 and the ice making chamber 3 (see Fig. 1) by the heat insulating partition wall 28 disposed above. And is partitioned into a lower freezing chamber (5) and a vegetable chamber (6) by an adiabatic partition wall (29) disposed below. A plurality of door pockets 32 are provided on the high inner side of the doors 2a and 2b of the refrigerating compartment 2 and the refrigerating compartment 2 is divided into a plurality of storage spaces in the longitudinal direction by a plurality of shelves 36 have. Between the upper freezing chamber (4) and the lower freezing chamber (5), a freezing compartment front dividing portion (40) is provided.

In the ice making chamber 3, the upper freezing chamber 4, the lower freezing chamber 5 and the vegetable room 6, the containers 3a to 6a provided integrally with the doors 3a to 6a provided in front of the respective rooms 3 to 6, And the storage containers 3b and 6b can be taken out by hooking their hand to the handle (not shown) of the doors 3a to 6a and pulling them forward. Although the ice making chamber 3 is not shown in Fig. 2, the ice making chamber 3 has the same structure as described above.

A cooler accommodating chamber 8 is formed in a substantially rear portion of the lower freezing chamber 5 and a cooler 7 is provided in the cooler accommodating chamber 8. [ An internal fan 9 is provided above the cooler 7. The air blown by the internal fan 9 to the cooler 7 is heat-exchanged with the cooler 7 to be cooled to be a cool air and sent to the respective parts of the refrigerator 1. That is, the refrigerating compartment 2, the upper freezing compartment 4, the lower freezing compartment 5, and the lower freezing compartment 5 are connected via the refrigerating compartment blowing duct 11, the upper freezing compartment blowing duct 12, the lower freezing compartment blowing duct 13, ), Cold air is sent to each chamber of the ice making chamber (3).

A description will be given of a state of cooling by the circulating air in the refrigerator 1 together with Fig. 3 is a side sectional view of the refrigerator 1 at a cross-sectional position different from that of FIG. 2 (a). The blowing of cool air to each of the rooms 2 to 5 is controlled by opening and closing a refrigerator compartment damper (hereinafter also referred to as an R damper) 20 and a freezer compartment damper (hereinafter also referred to as an F damper) Specifically, when the R damper 20 is in the open state and the F damper 50 is in the closed state, the cold air is sent from the air blow-out port 2c provided in the multi-stage through the refrigerating compartment blowing duct 11 to the refrigerating compartment 2 . The cold air 71 flowing from the back side to the front side of the refrigerating compartment 2 flows into a refrigerating compartment return opening not shown in the lower portion of the refrigerating compartment 2 after cooling of the refrigerating compartment 2, 7).

There are various methods for cooling the vegetable compartment 6. For example, there is a method of directly sending cold air to the vegetables room 6 after cooling the cold room 2, or a method of sending cool air generated by the cooler 7 alone to the vegetables room 6 without passing through the refrigerating room 2 have. In the latter case, a damper dedicated to the vegetable compartment 6 is required to control the cool air supplied to the vegetable compartment 6. The cool air 73 introduced into the vegetable compartment 6 is discharged from the vegetable compartment return port 6d provided at the lower front of the heat insulating compartment wall 29 through the vegetable compartment return duct 18 to the vegetable compartment return port 18a, and flows into the cooler 7.

The cool air 72 guided to the freezing chamber 3 is returned to the cooler 7 from the freezing chamber return port 17 after successively cooling the upper freezing chamber 4 and the lower freezing chamber 5 and the ice making chamber 3 . A defrost heater (22) is provided below the cooler (7). The drain water generated at the time of defrosting is once dropped to the cylinder 23 and then discharged through the drain hole 27 to the evaporation dish 21 provided in the head of the compressor 24 disposed in the machine room 56. The machine room 56 is the lowermost part of the rear surface of the refrigerator 1 and is formed on the outside of the heat insulating housing 10 and covered with the machine room cover 91.

Fig. 2 (b) is a rear view of the portion of the machine room 56 from which the machine room cover 91 is removed. The machine room cover 91 is provided with a suction port 96 for introducing outside air into the machine room 56 and a discharge port 97 for discharging the air in the machine room 56 to the outside. Although they are not illustrated, they are of a louvered structure to prevent the flow of anything other than air.

The air introduced from the inlet port 92 is heat-exchanged with the radiator 92 forming the refrigeration cycle as shown by an arrow in FIG. 2B and then blown to the compressor 24 side by the machine room fan 68 do. The compressor 24 supported by the compressor support portion 93 generates heat that increases with the increase of the number of revolutions. The outside air sent to the machine room 56 absorbs the heat generated by the compressor 24 and further increases in temperature and transfers the heat from the container wall of the heat storage tank 52 to the antifreeze stored in the heat storage tank 52. Thereafter, the refrigerant is discharged to the outside of the refrigerator 1 from the discharge port 97 formed in the machine room cover 91. The flow of this series of outside air is mainly caused by the machine room fan 68.

Fig. 3 is a view for explaining a structure using extreme thermal energy. As described above, the heat storage tank 52 filled with the antifreezing liquid 57 is provided in the machine room 56. The heat accumulation tank 52 recovers the heat radiated from the radiator 92 provided in the compressor 24 and / or the machine room 56 to the antifreezing liquid 57, . The temperature of the antifreeze 57 in the heat storage tank 52 can be raised to at least 30 ° C. which is an extreme temperature in the case of the room temperature of 30 ° C. by providing the heat storage tank 52 in the machine room 56. The arrangement of the compressor 24, the heat storage tank 52, and the machine room fan 68 shown in FIG. 2 (b) is merely an example, and the optimum arrangement is determined depending on the capacity of the refrigerator 1 or the like.

In the normal refrigerator 1, defrosting operation is carried out once a day. In the operation of the refrigerator 1 using the antifreeze 57 which is the high thermal energy utilization defrost mode, it is possible to raise the temperature of the antifreeze 57 to the room temperature level even after defrosting. To heat the antifreeze 57 at a room temperature or more, heat radiation from the compressor 24 provided in the machine room 56 or a radiator (not shown) is actively stored in the antifreeze 57. Heat can be stored in the antifreeze 57 by heat-recovering the heat discharged from the discharge pipe of the compressor 24 or the compressor 24 by exchanging heat with the antifreeze 57 in the heat storage tank 52, for example. In addition, a fan for promoting heat radiation is often attached to the radiator 92 installed in the machine room 56. Therefore, the heat storage tank 52 is provided at a place where heat can be exchanged with the temperature-rising air that has been blown by the fan and passed through the heat radiator.

That is, the heat storage tank 52 and the circulation pump 51 are connected by a pipe 55, the discharge port of the circulation pump 51 and the cooler 7 are connected to each other by a pipe 53, And the heat storage tank 52, respectively. The antifreeze 57 after heat exchange with the cooler 7 flows through the pipe 54. [ If the liquid level of the antifreeze liquid 57 charged in the heat storage tank 52 is lower than the connection position between the pipe 54 and the heat storage tank 52, the circulation pump 51 is rotated in the reverse direction, (See FIG. 4). Here, the antifreeze circulation pipe 58 is provided in direct contact with the cooler 7. The antifreeze 57 does not remain in the antifreeze circulation pipe 58 due to the reverse rotation of the circulation pump 51 and the freezing of the refrigerator 7 during the cooling operation or the heating load when the refrigerator 7 alone is heated by the defrost heater 22 Can be reduced.

4 is a rear side sectional view of a peripheral portion of the cooler 7 disposed on the back side of the lower freezing chamber 5 of the refrigerator 1. [ The defrost sensor 41 is provided on the upper portion of the cooler 7 and the control means 66 (see Fig. 3) executes the control determination concerning the defrosting operation based on the temperature detected by the defrost sensor 41 . A defrost heater 22 which is conventionally used is disposed under the cooler 7. The defrost heater 22 is constituted by a glass tube 44 having an electric heater inside and a heat dissipation fin 45 made of metal provided around the glass tube 44. Instead of the metal pin 45, the glass tube 44 may be a double glass tube. Any defrost heater 22 is employed in the refrigerator 1 using flammable refrigerant. Even if the combustible refrigerant leaks from the interior, the surface temperature of the glass tube on the outside is lower than the ignition point temperature of the combustible refrigerant, so that ignition of the combustible refrigerant can be prevented. On the upper portion of the glass tube (44), a defrosting water drop prevention portion (43) is provided. The defrost water is directly dropped to the glass tube 44 heated to a high temperature, and the glass tube is prevented from being broken due to the abrupt temperature change.

An antifreeze circulation pipe 58 is provided so as to directly contact the cooler 7 separately from the refrigerant pipe of the refrigeration cycle so as to heat the cooler 7 by exchanging heat between the cooler 7 and the antifreeze 57. [ The antifreeze pipe 58 is caulked between the pins at each end of the cooler 7. Although the flow direction of the antifreeze liquid 52 in the antifreeze circulation pipe 58 is from the upper side to the lower side or from the lower side to the upper side, in the present embodiment, the liquid flows from the lower side to the upper side for the following reasons.

In this embodiment, after the frost attached to the cooler 7 is completely melted, the defrost heater 22 alone is also used to heat the cooler 7 in order to improve the reliability at the time of defrosting. Since the antifreeze inflow portion of the antifreeze circulation pipe 58 is provided below the cooler 7, the temperature of the lower portion of the cooler 7 can be made higher than the temperature of the upper portion. That is, when the defrost heater 22 is turned ON and the heating is switched to the single heating, the temperature of the cooler 7 starts to rise gradually from the bottom toward the top. When the defrost sensor 41 provided on the upper part of the cooler 7 detects a predetermined temperature, the heating by the defrost heater 22 is terminated. Therefore, if the temperature of the lower portion of the cooler 7 is raised before the defrost heater 22 is switched to the single heating, the single heating time by the defrost heater 22, which greatly affects the power consumption, can be shortened.

The defrosting operation using the thus configured cooler 7 and the defrost heater 22 will be described below. When the circulation pump 51 is operated, the antifreeze 57 in the heat storage tank 52 flows into the antifreeze circulation pipe 58 provided in the cooler 7 via the pipes 55 and 53. At that time, heat exchanges with the frost attached to the cooler 7 to melt the frost. The temperature of the antifreeze 57 exchanged in the cooler 7 is lowered. The antifreeze 57 that has passed through the cooler 7 is returned to the heat storage tank 52 and again circulates the same route for a predetermined time.

The connection portion on the heat storage tank 52 side of the pipe 54 returned to the heat storage tank 52 is provided at a position higher than the liquid level of the antifreeze 57. [ The antifreeze liquid 57 in the antifreeze circulation pipe 58 which is in direct contact with the cooler 7 is discharged to the outside through the circulation pump 51 And is pushed back into the heat storage tank 52 by the wind power. Thereby, the antifreeze 57 can be completely recovered from within the antifreeze circulation pipe 58, and the antifreeze 57 in the antifreeze circulation pipe 58 is prevented from freezing. Since the antifreezing liquid 57 is not left in the antifreeze circulation pipe 58, the defrost heater 22 in which the circulation pump 51 is stopped in addition to the prevention of freezing during the cooling operation reduces the load when the cooler 7 is heated can do.

The energy saving mode of the refrigerator 1 according to the present invention described above will be described with reference to Figs. 5 and 6. Fig. FIG. 5 is a graph schematically showing the amount of heat required during the defrosting, and FIG. 6 is a diagram showing the amount of power required for defrosting. In the conventional system, the amount of heat Q required for defrosting is obtained only from the defrost heater (electric heater) provided below the cooler 7, and the cooler 7 is heated and defrosted. Therefore, the amount of heat Qe heated by the defrost heater is equal to the amount of heat Q required for defrosting.

On the other hand, in the refrigerator (1) of the present invention, a heating source other than the defrost heater (22), that is, high internal thermal energy Qin and high external thermal energy Qex are used as described above. Therefore, the heat quantity Q used for defrosting includes Q = Qe '+ Qin + Qex including these heat sources. In these three types of heating sources, the heating by the electric heater 22 is the largest in power consumption.

Since the refrigerator 1 of the present invention has the heating source in addition to the defrost heater 22, the amount of heating Qe by the electric heater 22 can be made smaller than the amount of heating Qe by the amount of heating Qe ' Even if the heat quantity Q is the same, the power consumption amount E can be reduced. Further, since defrosting using high thermal energy and high thermal energy can be performed, the heat transfer phenomenon of the heating source and the frost is promoted, and the heat quantity Q required for defrosting can be reduced to Q '. This makes it possible to further reduce the amount of power consumption during the defrosting.

Here, when the cooler 7 is heated by the high-temperature thermal energy Qin, the air itself in the refrigerator compartment 2 including the vegetables compartment 6 serves as a heat source. The energy required to obtain the high thermal energy Qin is only the fan power when the internal fan 9 is operated. When the internal fan 9 is operated, the air in the refrigerating compartment 2 including the vegetable compartment 6 is blown to the condenser 7 to become a heat source for melting the frost. The frost is melted and heat exchanged with it to become cold air, and returned to the refrigerator compartment 2 including the vegetable compartment 6 to become a cooling source. When the cooler 7 is heated by the high thermal energy Qex, since the outside air is basically used as the heat source, the necessary electric power is equal to the pump power when the circulation pump 51 is operated.

Assuming that the amount of electric power of the conventional system is Ee (= Qe), as described above, this electric energy value Ee is equal to the electric energy of the electric heater consumed by the defrost heater. In the refrigerator 1 of the present invention, the amount of power of the defrost heater 22 corresponds to the amount of heat Qe ', the amount of power of the internal fan 9 corresponds to the amount of heat Qin, , The consumed electric energy Ee 'is equal to the sum of the three types of electric energy.

Since the power consumption by the defrost heater 22 is about 150 W and the power consumption by the high-temperature fan 9 and the circulation pump 51 is about several W, the amount of power of the defrost heater 22 is reduced This contributes greatly to the reduction of the amount of power consumption at the time of defrosting. Therefore, in the present invention having the mode of heating by the heating means other than the defrost heater 22, the amount of power consumed in the defrost heater 22 is reduced, and therefore the amount of power consumption of the entire refrigerator 1 in defrosting is defined as Ee &Quot; can be reduced.

Next, various operation modes of the defrosting operation will be described with reference to Figs. 7 to 14. Fig.

[First Mode]

Figs. 7 and 8 are diagrams for explaining the first operation mode of defrosting operation, Fig. 7 is a time chart of defrosting operation, and Fig. 8 is a control flowchart of defrosting operation. 7, the refrigerator compartment damper (R damper) 20, the freezer compartment damper (F damper) 50, the internal fan 9, the circulation pump 51, the machine room fan 68 and the defrost heater 22, The defrosting sensor temperature T _S and the refrigerating compartment temperature T _R when the refrigerating room temperature sensor 66 is controlled, together with the operation state of each control device. 3, the control means 66 is provided in a corner portion on the upper back side of the refrigerator 1 and has a CPU 66a and a storage means 66b.

The time t1 is the time when the defrosting operation is started, the time t2 is the time when the defrost heater 22 is switched to the single heating, and the time t3 is the time when the defrosting operation is ended. Once a day, when the predetermined time or the operation time of the compressor 24 reaches a predetermined time (time t1), the defrosting operation of the refrigerator 1 is started (step S1). At this time, the temperature T _S detected by the defrost sensor 41 is T _S = T 1.

Incidentally, the operating state of the refrigerator 1 before the time t1 at which defrosting operation is started is generally a cooling operation. At this time, the refrigerator compartment damper (R damper) 20 is opened and the freezer compartment damper (F damper) 50 is closed, or the refrigerator compartment damper (R damper) 20 is closed and the freezer compartment damper The refrigerator compartment 2 (including the vegetable compartment 6) is opened by opening both the freezer compartment damper (R damper) 20 and the freezer compartment damper (F damper) And the freezing chambers 4 and 5 are determined according to the temperature state in the refrigerator 1 at that time. In any state, the internal fan 9 is on. The machine room fan 68 is turned on or off according to the temperature detected by the sensor 60 provided in the machine room 56. When the outside temperature is high, the machine room fan 68 is normally in an on state.

In this embodiment, since the temperature of the refrigerating chamber 2 rises before the time t1 of the start of the defrost operation, the freezing compartment is cooled. That is, the refrigerator compartment damper (R damper) 20 is closed, the freezer compartment damper (F damper) 50 is opened, the internal fan 9 is turned on, and the machine room fan 68 is turned on.

The control means 66 opens the R damper 20, closes the F damper 50, turns on the internal fan 9, turns on the circulation pump 51, turns on the machine room fan 68, 22 are set to OFF (step S2). That is, the cool air generated in the cooler 7 is guided only to the refrigerating chamber 2 and the vegetable chamber 6, but not to the upper and lower freezing chambers 4, 5. As described above, the cooler 7 is heated during the defrosting operation, and there is a possibility that the cooler 7 can not realize the freezing temperature.

This defrosting operation is a defrosting operation using high thermal energy due to the operation of the internal fan 9 and external heat energy generated by the circulating pump operation 51. When the circulation pump 51 is operated, the frost is heated through the antifreeze circulation pipe 58. As a result, the temperature of the antifreeze 57 is lowered. The machine room fan 68 is operated to supplement the heat released from the antifreeze circulation pipe 58 to the frost, thereby promoting the storage of the high-temperature heat in the antifreeze 57. A temperature sensor 60 is provided in the heat storage tank 52. The temperature of the antifreeze 57 is detected, and the control means 66 controls the defrosting machine room fan 68. When the temperature of the antifreeze 57 is lower than the outside air temperature during the defrost operation, the machine room fan 68 is operated.

Fig. 9 (a) schematically shows the fusing and melting state in the cooler 7 in the defrosting operation state. The frost layer grown on the cooler 7 is mainly located at the outer side (the outer side) of the cooler 7, while the internal fan 9 is operated during the time from the defrost operation start time t1 to the time t2 when the defrost heater 22 is switched to the single heater, . The circulating air 61 circulated to the refrigerating chamber 2 including the vegetable compartment 6 passes through the inside of the frost layer, but the frost is melted from the outside. On the other hand, the frost is heated from the antifreeze circulation pipe (58) provided in the cooler (7) while the circulation pump (51) is operated to use the high thermal energy. Thereby, the frost is melted from the inside, and the melting portion 63 is formed. Therefore, melting occurs from the outside and the inside of the frost layer adhered to the cooler 7, and the convection of air and frost is promoted by the forced convection passing through the cooler 7, so that the frost can melt quickly and uniformly .

7, since the temperature T _s detected by the defrost sensor 41 is the temperature of the cooler 7, when the defrosting operation is started, the antifreeze 57 in the antifreeze circulation pipe 58 causes the temperature T _S to decrease to T _{From S} = T1, T _S = 0 ° C at which the frost starts melting. Here, during the time from t4 to t5 is the time, and frost is melted, since the water phase (相) changes from frost defrost sensor temperature T _S is in almost T _S = 0 ℃ = constant. The circulating air 61 that has passed through the cooler 7 is cooled and the circulating air 61 is supplied to the vegetable compartment 6 and / And is guided to the refrigerating chamber (2) to cool the vegetables room (6) and the refrigerating chamber (2). Here, since the internal fan 9 is operating, the refrigerating compartment temperature T _R is lowered. During the period from time t4 to t5 when the frost melts, the refrigerating temperature is maintained at a stable level.

When the temperature T _S detected by the defrost sensor 41 becomes a temperature equal to or higher than the freezing point temperature, that is, T _S = T2 (step S3) as a result of continuing the defrost operation using the high energy and the high energy, The defrosting operation of the defrost heater 22 is switched to the defrosting operation of the defrost heater 22 in order to melt frost which may remain in the vicinity of the cooler 7 (step S4). This temperature T2 is, for example, 1 DEG C immediately after the end of melting of the frost.

The F damper 50 is opened, the internal fan 9 is turned off, the circulation pump 51 is turned off, the machine room fan 68 is turned off, the defrosting operation is turned off, The control means 66 switches the heater 22 to the ON state. The frost of the cooler 7 melts at the time when the defrost sensor temperature T _S reaches T _S = T2, but there is a case where the frost remains in the peripheral portion other than the cooler 7. Therefore, the cooler 7 The defrost heater 22 provided at the lower portion of the defrost heater 22 is defrosted independently.

In the present embodiment, when the defrosting is performed by the heater 22, the freezing chamber damper (F damper) 50 is provided for promoting natural convection of the air around the cooler 7 heated by the heater 22 Open. This generates a circulating flow by natural convection flowing from the cooler 7 to the freezer compartment damper (F damper) 50 to the freezer compartment 4 to the freezer compartment return port 17 to the cooler 7.

The heated air flows into the freezing chambers 4 and 5 through the freezing chamber damper (F damper) 50, so that the heat load of the freezing chambers 4 and 5 is increased. However, the defrosting time by the heater 22 is only a short period of time after the frost of the cooler 7 is melted, and the time during which the heated air flows into the freezing chambers 4 and 5 is equal to the defrosting time It is possible to effectively defrost the freezing chamber damper (F damper) 50 as a whole in a short time in which comparison is not performed. The refrigerating chamber damper (R damper) 20 is closed because it is easy to generate the circulating flow on the side of the freezing chambers 4, 5 but it is difficult to generate the circulating flow on the side of the refrigerating chamber 2. The internal fan 9 is turned off.

In the heating by the defrost heater 22, the heating load is increased when the antifreeze liquid 57 remains in the antifreeze circulation pipe 58. Therefore, when the defrost sensor temperature T _S becomes T _S = T2, the circulation pump 51 is reversely rotated. Thereby, the antifreeze liquid in the antifreeze circulation pipe (58) can be recovered to the heat storage tank (52). The temperature of the defrost condenser (7) at the end is, by the defrost sensor temperature of the top of the condenser (7) T _S T _S = is about 10 ℃, the lower part of the near cooler 7 to the defrost heater (22) 40 ℃ vicinity . The temperature of the antifreeze 57 after using the high thermal energy is lowered because the frost is melted. When the defrosting sensor temperature T _S is higher than the temperature of the antifreeze 57 measured by the temperature sensor 60 provided in the heat storage tank 52, the circulation pump 51 is operated to recover the heat of the cooler 7 It is good to do. Thereby, when returning from the defrosting operation to the normal cooling operation, the temperature of the cooler 7 can be lowered before the compressor 24 is operated, and the re-cooling time can be shortened.

Fig. 9 (b) schematically shows a state around the cooler 7 when the defrost heater 22 alone heats the cooler 7. As shown in Fig. 9 (b) is a view of the defroster cooler 7 as in FIG. 9 (a). In this state, the frost is not observed in the cooler 7, and the air 62 around the lower portion of the cooler 7 heated by the defrost heater 22 flows upward from below. At this time, the temperature starts to rise toward the upper part of the cooler 7, and at the same time, the wall surface of the periphery of the cooler 7 is also heated, and the remnant of melting of the frost disappears.

When the defrost sensor temperature T _S is equal to T _S = T3 (step S5), the defrosting operation by the defrost heater 22 is ended (step S6).

When the defrosting operation is completed, the cooling operation is resumed. Therefore, the internal fan is turned on. The refrigerating chamber 4 (including the vegetable compartment 6) and the freezing compartments 4 and 5 are different from each other in the present embodiment in the state of cooling operation depending on the internal temperature of the refrigerator 1 after the defrosting operation, Both the refrigerator compartment damper (R damper) 20 and the freezer compartment damper (F damper) 50 are opened and the internal fan 9 is turned on and the machine room fan 68 is turned on.

According to this embodiment, it is possible to perform defrosting using a heating source other than a defrost heater using electric energy, that is, a high-temperature thermal energy with a small power consumption and a high thermal energy as a heating source. In other words, when cooling the refrigerating chamber using the latent heat of fusion of the frost, the conventional defrost heater 22 is not used as a heating source, but the frost is discharged from the cooler surface side (outside) Since the heating means for melting from the outer surface side (inner side) of the frost is used, cooling energy can be efficiently reduced by using the latent heat of fusion of the frost.

[Second mode]

The second mode of the defrosting operation according to the present invention will be described with reference to Figs. 10 and 11. Fig. 10 is a time chart of defrosting operation similar to that shown in Fig. 7, and Fig. 11 is a flowchart of defrosting control. This mode is suitable for a large amount of implantation. The first mode is different from the first mode in that the start of heating by the defrost heater 22 is accelerated and the defrosting using the high thermal energy due to the operation of the internal fan 9 and the external heat energy due to the operation of the circulation pump 51 is completed The defrost heater 22 is turned on before. In the case where the frost amount is large, that is, it takes time until the time t5 at which the melting of the frost is finished, the heat source is insufficient only by the high thermal energy and the high thermal energy, and the temperature of the freezing chambers 4, There is a risk of rising. Therefore, in the second mode, the defrost heater 22 is operated as a heating source before reaching the time t2, thereby shortening the defrosting time. The temperature and operating conditions in the refrigerator 1 before and after the defrosting operation are the same as those in the embodiment of Fig.

More specifically, once a day or when the operation time of the compressor 24 reaches a predetermined time, the defrost operation mode is started (step S7). This time is time t1. The R damper 20 is opened, the F damper 50 is closed, the internal fan 9 is turned on, the circulation pump 51 is turned on, the machine room fan 66 is turned on, and the defrost heater 22 is turned off Step S8), and the defrosting operation is started. If the temperature T _R of the freezing compartment 2 becomes equal to or higher than T _R = TF2 (step S9) during the time before the time t5 at which the frost fusion is completed, the deterioration of the preservability of the food stored in the freezing compartments 4 and 5 So that the defrost heater is turned on during the melting of the frost (step S10). Here, the time t5 is the time when the frost fusion is completed, and the time t6 is the time when the freezer compartment temperature T _R becomes T _R = TF2.

When the defrost sensor temperature T _S is a T _S = T2, closing the R damper 20, opening the F damper 50, off in chamber fan (9), turning off the circulation pump 51, a machine room a fan 66 And the defrost heater 22 continues to be in the ON state (step S12). The defrost heater 22 is used alone to heat the cooler 7 until the defrost sensor temperature T _S becomes equal to or higher than the freezing point T _S = T3.

In this defrosting operation mode, the defrosting operation (t4 to t5) is performed in which the input energy is made as small as possible and the high thermal energy and the high thermal energy are used as the heat source in order to cool the refrigerating chamber 2 by using the latent heat of fusion of the frost, Thereby realizing cooling of the refrigerating chamber 2 using the latent heat of fusion of the frost. In the case of a large amount of frost, the defrost heater 22 may be added to the heating source before the frost completely melts to shorten the time (t5) in which the frost is completely melted.

[Third mode]

Other modes of the defrosting operation according to the present invention will be described with reference to Fig. 12 is a time chart of defrosting operation similar to that of Figs. 7 and 10. Fig. It is a defrosting operation mode suitable for a small implantation amount. If the amount of fusing is small, the time interval t4 to t5 in which the frost melts is short. In addition, the temperature T _S detected by the defrost sensor 41 rises quickly. Therefore, the temperature gradient from the start of defrosting to the start of melting of frost when frost is small is measured in advance. When the temperature gradient is smaller than the reference value, it is determined that the frost is small. The temperature and operating conditions in the refrigerator 1 before and after the defrosting operation are the same as those in the embodiment of Fig.

When it is judged that the implantation amount is small, the internal fan 9 is operated from the time t1 to t4 and the defrosting by the high thermal energy is performed. When it is judged that the temperature gradient is larger than the reference value and the state in which the implantation amount is not small, the first defrosting operation mode shown in Fig. 7 is set. Concretely, the R damper 20 is opened, the F damper 50 is closed, the internal fan 9 is turned on, the circulation pump 51 is closed The mechanical room fan 68 is turned on and the defrost heater is turned off to start defrosting operation. Here, the defrost operation start time t1 is determined from a predetermined time once a day or an operation time of the compressor.

In the defrost sensor temperature T _S is still determined time t7 of the freezing point or less implantation amount, it is when the defrost sensor temperature T _S is a predetermined reference value T7 or less, until the defrost sensor temperature T _S is to be a freezing point temperature, that is, frost and thawing The circulation pump 51 is turned off and the machine room fan 66 is turned off until the start of the operation, and the cooler 7 is heated only by circulation of cool air by the internal fan. At time t4 the defrost sensor temperature T _S is the temperature to the freezing point, and switches the machine room the fan 66, and turns on the re-circulation pump 51, in order to make up for the lack of heating amount on. Thereafter, it is the same as the first defrost operation mode shown in Fig.

[Fourth mode]

The fourth defrosting operation mode according to the present invention will be described with reference to Figs. 13 and 14. Fig. Fig. 13 is a time chart of the defrosting operation, and Fig. 14 is a control flowchart of the defrosting operation. This defrosting operation mode is a mode for starting the defrosting operation when the defrosting sensor temperature T _S reaches the lower limit temperature T0. The freezing temperature of the antifreeze 57 is determined by adjusting the concentration of the antifreeze 57 filled in the heat storage tank 52. [ The temperature and operating conditions in the refrigerator 1 before and after the defrosting operation are the same as those in the embodiment of Fig.

However, in order to lower the freezing temperature of the antifreeze 57, it is necessary to make the concentration of the antifreeze 57 thicker. However, if the concentration is increased, the viscosity of the antifreezing liquid becomes too high and the power of the circulation pump 51 increases. As a result, the amount of power consumed when the heat stored by the high thermal energy is transported to the antifreeze circulating pipe 58 is increased. Also, the specific heat is reduced, and the capacity of the heat storage tank 52 is increased to deteriorate the installation property.

In the refrigerator 1, the rapid freezing operation is performed in the case of rapid freezing. However, in this rapid freezing operation, the temperature of the cooler 7 is lower than that in the normal cooling operation, so that the concentration of the antifreeze 57 So that the antifreeze 57 is prevented from freezing. In order to solve the problem in the conventional defrosting operation in response to the change in concentration of the antifreeze 57, in the fourth defrosting operation mode, it is possible to prevent freezing in the piping without increasing the concentration of the antifreezing liquid .

Defrosting is started at a predetermined temperature TO below the freezing temperature of the antifreeze 57 filled in the heat storage tank 52 (step S15). When the circulation pump 51 is operated at this temperature, the antifreeze liquid may be frozen in the piping. Therefore, the control means 66 opens the R damper 20, closes the F damper 50, turns on the internal fan 9, turns off the circulating pump 51, turns off the machine room fan 68, (Step S16). That is, the first defrosting mode shown in Fig. 7 is different from the first defrosting mode in that the circulating pump 51 is turned off. The defrosting operation is continued for a while only by storing the high internal energy by the internal fan 9 and the external heat energy by the machine room fan 68. [ When the defrost sensor temperature T _S rises to the temperature T1 exceeding the freezing temperature of the antifreeze 52 (step S17), the circulation pump 51 is turned on and the cooler 7 is heated by the antifreeze 52 Step S18). Thereafter, it is the same as the first defrost operation mode shown in Fig. 7 (steps S20 to S24). Instead of step 16, the internal fan 9 and the circulation pump 51 may be kept in a stopped state for a while after the start of the defrosting operation, and the defrosting sensor temperature T _S may be waited for an increase.

In the same manner as in the second defrosting operation mode shown in Figs. 10 and 11, when the freezing compartment temperature rises above TF2 before the frost melting ends (time t5), defrost heater 22 ) Is started to be turned on. That is, when the freezing operation is stopped for a long time (step S19), the defrost heater is turned on to accelerate the melting of the frost (step S20). When the defrost sensor temperature T _S reaches T2 (step S21), the defrost heater 22 is switched to the independent heating (step S22). The defrosting temperature T _s is raised to T3 by the single heating of the defrost heater 22 (step S23), and thereafter the defrosting operation is terminated (step S24).

According to each of the embodiments of the present invention and the defrosting operation mode described above, since the cool heat energy of the frost that has grown on the cooler during the defrosting operation is effectively used, it is possible to perform cooling using the latent heat of fusion of the frost while defrosting with little input energy , And the amount of power consumption can be reduced. In addition, conventionally, since there is only heating means using an antifreeze liquid, it is difficult to suppress the temperature rise in the freezing chamber when the congestion amount is large. According to each of the above embodiments, defrosting according to the implantation amount can be performed. Therefore, when the implantation amount is small, the defrosting time can be shortened. When the implantation amount is large, the temperature rise of the freezing compartment temperature can be suppressed, The problem can be prevented.

Further, in the refrigerator, the frost mainly occurs in the cooler, but the frost may grow in addition to the cooler, for example, in the vicinity of the air passage surface (solid wall surface) in which the cooler is housed or in the vicinity of the inward circulation fan. Since the direct cooler is heated by the conventional antifreeze, the frost attached to the antifreezing liquid and the cooler is promoted, but it is difficult to reliably dissolve frost in a place apart from the cooler. In this embodiment, since the defrost heater is mainly used for defrosting the space away from the cooler, the amount of electric power can be reduced to some extent, and defrosting of the refrigerator parts can be reliably performed.

In the refrigerator shown in the above embodiment, energy is saved because a heating source other than a defrost heater (electric energy), that is, defrosting using high thermal energy and high thermal energy having a small amount of power consumption as a heating source is performed.

1: Refrigerator
2: Refrigerator
2a, 2b: Door
2c:
3: Ice making room
3a: Door
3b: storage container
4: Top Freezer
4a: Door
4b: storage container
5: Lower freezer
5a: door
5b: storage container
6: Vegetable room
6a: Door
6b: storage container
6d: Vegetable room return port
7: Cooler
8: Cooler compartment
9: High fan
10: Insulation phase itself
11: Refrigerator duct blowing duct
12: Top freezer blowing duct
13: Lower freezing room blowing duct
17: Freezer room return port
18: Return duct of vegetable room
18a: Return to the vegetable room outlet
20: Refrigerating chamber damper (R damper, first opening and closing means)
21: evaporation dish
22: defrost heater (first heating means)
23:
24: Compressor
25: Vacuum insulation
27: drain hole
28, 29: an insulation partition wall
32: Door pocket
36: Shelf
40: Freezer compartment front compartment
41: defrost sensor
43: Constant dropping prevention part
44: Glass tube
45: metal pin (heat dissipation pin)
46: Refrigerating chamber return air flow
50: Freezer damper (F damper, second opening / closing means)
51: circulation pump
52: storage tank
53 to 55: pipe
56: Machine room
57: Antifreeze
58: Antifreeze circulation pipe
59: Frost
60: Sensor
61: Circulating air
62: Heating air
63: melting portion
66: control means
66a: CPU
66b: storage means
68: Machine room fan
71 to 73: Cold air (flow)
91: Machine room cover
92: Radiator
93: compressor support
94: Machine room base
96: inlet
97:

Claims (9)

A refrigerator having a refrigerator compartment and a freezer compartment, a refrigerator having a refrigerator and a compressor for generating cold air for cooling the refrigerator compartment and the freezer compartment, first opening and closing means for opening and closing the refrigerant passage leading to the refrigerating compartment, A second opening / closing means for opening / closing a flow path for guiding the cool air generated in the cooler to the freezing chamber; a high-temperature fan for blowing cold air generated in the cooler to at least one of the freezing chamber and the freezing chamber; Second heating means including the first and second opening and closing means and the high-temperature fan, for heating the cooler by circulating the refrigerating chamber and increasing the temperature of the cooler, first heating means having the heater, And a circulation pump for circulating the piping and the antifreeze through which the antifreeze flows, A third heating means having a heat storage tank and a machine room fan for storing at least any one of heat and outside heat generated in the antifreeze, And the control means controls the operation of the first heating means. In the defrosting operation, the control means heats the cooler by using at least one of the first to third heating means, The refrigerator is cooled by one air and a defrosting sensor is provided in the vicinity of the antifreezing liquid outlet at a portion where the third heating means is in contact with the cooler, The circulation pump is rotated in the reverse direction until the freezing temperature of the heat storage tank is exceeded, , A refrigerator characterized in that the operation of recovering. 2. The refrigerator according to claim 1, wherein the control means activates the second and third heating means before the first heating means is operated in the defrosting operation. 3. The refrigerator according to claim 1 or 2, wherein the control means operates the first heating means after heating by the second and third heating means. The refrigeration system according to claim 1 or 2, wherein the second heating means uses air after circulating the high-temperature air in the refrigerating temperature zone by the high-temperature fan, Storing the heat, and thermally transporting the antifreeze to the cooler. The control device according to claim 1 or 2, wherein when the temperature detected by the defrost sensor does not reach a predetermined temperature exceeding a freezing point within a predetermined time from the start of defrosting, The heating by the first heating means is activated in addition to the heating by the first heating means. 3. The refrigerator according to claim 1 or 2, wherein the second heating means defrosts the frosting of the cooler from the outer surface side of the frosting, and the third heating means defrosts the frosting of the cooler from the surface side contacting the cooler, And the refrigerator. The refrigeration system according to claim 1 or 2, wherein the control means operates the first opening / closing means so as to guide cool air generated by heating the frost attached to the cooler by the second heating means to the refrigerator compartment Refrigerator. delete delete

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