KR100370063B1 - Refrigerator having direct-freezing chamber - Google Patents

Abstract

The present invention relates to a refrigerator having a direct cooling room using a direct cooling method in a freezer compartment. The refrigerator of the present invention includes a freezer compartment partitioned at the top of the refrigerator, a refrigerator compartment partitioned at the bottom of the refrigerator, and an upper portion of the freezer compartment and the refrigerating compartment. A circulating cold air flow path formed between the surfaces, a first back surface flow path communicating with the circulating cold air flow path at the rear of the freezing chamber, and a cold air flow in communication with the circulating cold air flow path at the rear of the refrigerating chamber. A second blower channel, a first blower fan installed on the first rear flow path to forcibly circulate the cold air in the freezing chamber through the circulation flow path and the first rear flow path, and the cold air in the refrigerating compartment; A second blowing fan installed on the second back channel for forced circulation through the second back channel, and installed on the circulation cold air passage Comprising: an evaporator; The evaporator includes a direct cold plate forming the lower surface of the freezer compartment, an evaporative refrigerant tube installed in contact with the direct cold plate, and a refrigerant having a low temperature and low pressure flow therein, and cold air flowing into the circulation cold air flow path from the freezer compartment and the refrigerating compartment. Are separated from each other and distributed to each other to include a freezing compartment side circulation duct and a refrigerating compartment side circulation duct separately installed under the direct cold plate so as to flow into the first back channel and the second back channel, respectively.

Description

Refrigerator with direct cooling room {Refrigerator having direct-freezing chamber}

The present invention relates to a refrigerator, and more particularly, to a refrigerator having a direct cooling chamber using a direct cooling method in a freezer compartment.

In general, a refrigerator is a refrigeration refrigerating device that allows food to be kept fresh for a long time by reducing the temperature of the refrigerator by repeating a refrigeration cycle of compressing, condensing, expanding, and evaporating refrigerant, which is almost essential not only in restaurants but also in homes. It is a generalized home appliance that is used as.

The basic configuration of the refrigerator as described above is as follows.

The refrigerator includes a compressor for raising and lowering the gas refrigerant in a low temperature and low pressure state to a high temperature and high pressure state, and a condenser for cooling and condensing the refrigerant in the high temperature and high pressure gas state introduced from the compressor to a liquid refrigerant having a temperature of 40 ° C. and a pressure of 9 atm. (Condenser), a capillary tube for depressurizing the refrigerant introduced through the condenser compared to the diameter of the refrigerant pipe of the other portion, and the air in the chamber having a relatively high temperature while evaporating the refrigerant through the capillary at low temperature and low pressure. It consists of an evaporator which heat-exchanges and lowers the inside of a refrigerator.

A conventional indirect cooling type refrigerator, which is essentially equipped with the above devices, is configured as shown in FIG. 1, and is provided on the evaporator 5 at an inner upper part of the outer case 1, which is an insulating material constituting the exterior of the refrigerator. The cold air that is heat-exchanged by the heat is directly introduced into the freezer compartment (2) for maintaining the room temperature of about -18 ℃, the lower portion of the outer case (1) as the heat exchange in the process of supplying cold air from the freezer side The refrigerator compartment 3 which maintains the room temperature of high temperature (0-7 degreeC) state compared with the freezer compartment 2 is partitioned.

However, in the conventional refrigerator as described above, the temperature in the freezer compartment 2 is about 18 ° C. and the freezer compartment 3 is maintained at about 3 ° C. as described above. If the temperature is below 29 degrees, it is known that food can be preserved for a long time (1 year).

Therefore, the conventional refrigerator has a problem in food preservation for a long time.

In addition, in the conventional indirect cooling type refrigerator, as the capacity of the refrigerator increases, the capacity of the compressor has to be increased in order to maintain the temperature of the freezer, which is inefficient. When the food is excessively loaded in the freezer, the temperature of the freezer is very stable. There was a difficult problem.

Accordingly, the present invention has been made in order to solve the above problems, by providing a direct cooling room that can be rapidly lower temperature than the conventional by the direct cooling method in the freezer, the cooling of the food in the freezer is made rapidly as well as food It is an object of the present invention to provide a refrigerator having a direct cooling chamber capable of stably maintaining a temperature capable of long-term storage.

1 is a longitudinal sectional view showing main parts of a conventional refrigerator as a conventional technology.

2 is a longitudinal sectional view showing main parts of the refrigerator according to the present invention;

Figure 3 is a perspective view schematically showing the structure of the cold air flow path and the evaporator formed in the refrigerator according to the present invention

Explanation of Reference Symbols in Major Parts of Drawings

10-Outer case 20-Freezer

22-Freezing chamber side back passage 24-First blower fan

30-Refrigerator room 32-Refrigerator side back passage

34-2nd blower fan 40-circulating cold air flow path

51-Compressor 60-Evaporator

61-direct cooling plate 62-refrigerant tube for evaporation

63-Circulation duct on the freezer side 64-Circulation duct on the freezer side

65-Defrost Heater

In order to achieve the above object, the present invention provides a freezing compartment partitioned at the top of the refrigerator, a refrigerating compartment partitioned at the bottom of the refrigerator, a circulating cold air flow path formed between the freezing compartment and the upper surface of the refrigerating compartment, and the rear of the freezing compartment. A first back surface passage formed in communication with the circulation cold air passage so that the cold air flows, a second back surface passage formed in communication with the circulation cooling air passage behind the refrigerating compartment and in which cold air flows, and the cold air in the freezing compartment in the circulation passage and A first blower fan installed on the first back passage to force circulation through the first back passage, and the second back passage to force circulation of cold air in the refrigerating chamber through the circulation passage and the second back passage; A second blower fan installed in the upper portion and an evaporator installed in the circulation cold air flow path; The evaporator includes a direct cold plate forming the lower surface of the freezer compartment, an evaporative refrigerant tube installed in contact with the direct cold plate, and a refrigerant having a low temperature and low pressure flow therein, and cold air flowing into the circulation cold air flow path from the freezer compartment and the refrigerating compartment. The refrigerator having a direct cooling chamber comprising a freezing compartment side circulation duct and a refrigerating compartment side circulating duct installed separately from each other so as to flow into the first rear channel and the second rear channel, respectively. to provide.

Hereinafter, an embodiment of a refrigerator according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 2, the refrigerator having the direct cooling chamber of the present invention includes an outer case 10, which is a heat insulating material constituting the outer appearance of the refrigerator, and a freezing compartment 20 partitioned on an inner upper portion of the outer case 10. And a refrigerating compartment 30 divided into a plurality of compartments under the outer case 10, and doors 21 and 31 for opening and closing each chamber in front of the freezing compartment 20 and the refrigerating compartment 30. ) Are installed respectively.

In addition, the lower end of the outer case 10 is provided with a compressor 51, a condenser (not shown) and a blowing fan (not shown) constituting a cooling cycle.

A freezing compartment side back passage 22 is formed at the rear of the freezing compartment 20 so that cold air in the freezing compartment can be circulated, and a rear passage 32 at the refrigerating compartment side so that cold air in the refrigerating compartment can be circulated in the rear side of the freezing compartment. ) Is formed.

Between the lower portion of the freezer compartment 20 and the upper surface of the refrigerating compartment 3, a circulating cold air flow path 40 is formed so that the cold of the freezer compartment 20 and the cold air in the refrigerating compartment 30 can flow from the front side to be distributed to the rear side. The circulating cold air flow passage 40 is also in communication with the freezing chamber side back passage 22 behind the freezing chamber 20 and the refrigerating chamber side back passage 32 behind the refrigerating chamber 30 at the rear side thereof.

In addition, each of the freezing compartment side back passage 22 and the refrigerating compartment side back passage 32 has a small first blowing fan 24 and a second blowing air for forcibly circulating air in the freezing compartment 20 and the refrigerating compartment 30. The fan 34 is provided.

On the other hand, as shown in Figure 3, the circulating cold air flow path 40 is provided with an evaporator 60 having a predetermined structure, the evaporator 60 is a direct cold plate forming the lower surface of the freezer ( 61, the evaporative refrigerant pipe 62 is installed in contact with the direct cold plate 61 and the low-temperature low-pressure refrigerant flows, and the freezing chamber 20 and the refrigerating chamber 30 of the circulating cold air passage 40 The freezing chamber side circulating duct 63 is separately installed in the lower portion of the direct cold plate 61 so that the cold air introduced into the front surface is separated from each other and flows into the freezing compartment side back passage 22 and the refrigerating compartment side back passage 32, respectively. ) And the refrigerating chamber side circulation duct (64).

At this time, the direct cold plate 61 is made of a good heat transfer aluminum material is to be cooled directly by the heat exchange of the freezer compartment cold air directly above the direct cold plate 61.

In other words, the air flowing from the freezing compartment 20 passes through the freezing compartment side circulation duct 63 and is cooled by heat exchange with the refrigerant in the evaporative refrigerant tube 62 and then flows into the freezing compartment side back passage 22. The air flowing from the refrigerating chamber 30 passes through the refrigerating chamber side circulating duct 64 and is cooled by heat exchange with the refrigerant in the evaporative refrigerant pipe 62 and then flows into the refrigerating chamber side back passage 32.

On the other hand, the lower surface of the refrigerating chamber-side circulation duct 64 is provided with a defrost heater 65 that periodically operates.

Hereinafter, the operation of the refrigerator having a direct cooling chamber having the above configuration will be described.

The general cooling cycle is the same as the conventional cooling cycle configuration and operation, so a detailed description thereof will be omitted.

When the user applies power, the cooling cycle in the refrigerator is driven, and the first blower fan 24 and the second blower fan 34 installed in the rear passage 22 of the freezer compartment operate and cool air in the freezer compartment and cold air in the freezer compartment. Will be cycled.

First, the cold air circulation in the freezer compartment 20 will be described. By the operation of the fan, the cold air in the lower part of the freezer compartment flows into the freezer compartment side circulation duct 63 of the evaporator 60 through the front side of the circulation cold air passage 40. do.

The cold air introduced into the freezing compartment side circulation duct 63 is cooled by the evaporating refrigerant tube 62 and the direct cooling plate 61 in the upper portion of the duct, and then flows out into the rear side free passage 22 at the rear side. At this time, the freezing chamber immediately above the direct cold plate 61 of the evaporator 60 in the process of heat exchange in the evaporator 60 is directly heat exchanged by the direct cold plate 61, so it becomes a low temperature of about 25 ℃.

The cold air cooled by passing through the freezing compartment side circulation duct 63 passes through the freezing compartment side back passage 22 and slightly rises in temperature due to heat loss, and then again by the first blower fan 24. ) Flows into. At this time, the temperature of the cold air flowing into the freezing chamber 20 is about 18 degrees Celsius.

Therefore, through the above process, the cold air of about 18 degrees Celsius is maintained in the upper portion of the freezer compartment 20, and the cold air of about 25 degrees Celsius or less is continuously maintained in the lower portion of the freezer compartment 20.

Next, the cold air circulation in the refrigerating chamber side will be described. The cold air in the refrigerating chamber 30 is introduced into the front side of the refrigerating cooling channel 40 above the refrigerating chamber by the operation of the second blowing fan 34 to refrigerate the evaporator 60. It is introduced into the measured circulation duct (64).

The cold air introduced into the refrigerating chamber side circulation duct 64 is cooled by heat exchange with the upper evaporator 60 and then cooled, and then flows into the refrigerating chamber side back passage 32 and thus flows into the refrigerating chamber side back passage 32. Cold air is supplied to each compartment of the refrigerator compartment through a cold air discharge hole (not shown) formed in each compartment of the refrigerator compartment. At this time, the cold air flowing into the refrigerating chamber 30 has a temperature of about minus 3 ℃.

On the other hand, since the defrost occurs frequently during the heat exchange process because the cold air in the refrigerating compartment contains a lot of moisture in the refrigerating chamber-side circulation duct 64, the refrigerator according to the present invention periodically operates the defrosting surface heater 65 to perform defrosting. Will be performed.

As described above, according to the present invention, the lower surface of the freezer compartment is composed of a direct cold plate of the evaporator which is directly heat-exchanged with the refrigerant pipe for evaporation, thereby forming a direct cold compartment in the freezer compartment, it is possible to long-term storage of food.

In addition, since the cold cycle of the freezer compartment and the cold air of the refrigerating compartment is separated and circulated, the cycle of frost formation is prolonged. As a result, the defrost cycle is long and effective defrosting performance can be expected with a small amount of heat. The effect which becomes efficient also can be acquired additionally.

Claims (3)

A freezer compartment partitioned at the top of the refrigerator, The refrigerator compartment partitioned in the lower part of the refrigerator, A circulation cold air passage formed between the freezing chamber and the upper surface of the refrigerating chamber, A first rear surface flow passage communicating with the circulation cold air flow passage at a rear side of the freezing chamber so that cold air flows; A second rear surface flow passage communicating with the circulation cold air flow passage at a rear side of the refrigerating chamber so that cold air flows; A first blowing fan installed on the first rear channel for forcibly circulating cold air in the freezing chamber through the circulation channel and the first rear channel; A second blowing fan installed on the second back passage for forcibly circulating cold air in the refrigerating compartment through the circulation passage and the second back passage; An evaporator installed on the circulation cold air passage; The evaporator, and a direct cold plate forming the lower surface of the freezer compartment, A vaporization refrigerant tube installed to be in contact with the direct cold plate and having a low temperature low pressure refrigerant flowing therein; The freezing compartment side circulation duct and the refrigerating compartment side which are separately installed under the direct cold plate so that the cold air flowing into the circulation cold air flow passage from the freezing compartment and the refrigerating compartment is separated from each other and flows into the first and second back flow passages, respectively. Refrigerator with direct cooling room including a circulation duct. The refrigerator with a direct cooling room according to claim 1, wherein a defrosting device is installed in the recirculation duct of the refrigerating compartment. The refrigerator with a direct cooling room according to claim 1, wherein the direct cooling plate is made of aluminum.