KR101084095B1 - Cold air circulator for refrigerator - Google Patents

Abstract

The present invention relates to a cold air circulation device for a refrigerator, and in particular, the cold air supplied to the vegetable compartment is selectively made from the freezer compartment, and by allowing the cold air circulated in the cold compartment to be recovered to the inlet side of the cold compartment, individual temperature control of the vegetable compartment is possible and necessary. The present invention relates to a refrigerator cold air circulation system which can prevent the above cool air from being supplied and allow sufficient heat exchange in the refrigerating chamber.

A cold air circulation device for a refrigerator according to the present invention includes: a first supply passage connecting a cooling chamber in which an evaporator is installed and a freezing chamber to supply cold air, and a first recovery passage for guiding cold air exchanged from the freezing chamber to the cooling chamber, and the first A second recovery passage connecting the first blowing fan provided in the supply passage, the discharge side of the cooling chamber and the suction side of the refrigerating chamber, the second supply passage provided with a damper, and the discharge side of the refrigerating chamber, and the suction side of the cooling chamber; And a second blower fan installed in the second supply passage, a branching passage branched from the freezing compartment and connected to the vegetable compartment, and a circulation passage connected to the second supply passage on one side of the refrigerating compartment.

Refrigerator, cold air circulation system, freezer, refrigerator, cooling room, vegetable room

Description

Cold air circulation unit for refrigerator {COLD AIR CIRCULATOR FOR REFRIGERATOR}

1 is a configuration diagram showing a cold air circulation device for a refrigerator according to the prior art,

2 is a configuration diagram showing a cold air circulation device for a refrigerator according to the present invention;

3 is a cross-sectional view showing a cold air circulation device for a refrigerator according to the present invention.

<Explanation of symbols on main parts of the drawings>

50: cooling chamber 52: compressor

54 condenser 56 expansion valve

58: evaporator 60: freezer

62: first supply passage 64: first recovery passage

70: first blowing fan 80: refrigerator compartment

82: second supply passage 84: second recovery passage

86: second blowing fan 90: branch euro

92: second damper 94: vegetable compartment

100: circulation passage 102: upper circulation passage

104: lower circulation flow path

The present invention relates to a cold air circulation device for a refrigerator, and in particular, the cold air supplied to the vegetable compartment is selectively made from the freezer compartment, and by allowing the cold air circulated in the cold compartment to be recovered to the inlet side of the cold compartment, individual temperature control of the vegetable compartment is possible and necessary. The present invention relates to a refrigerator cold air circulation system which can prevent the above cool air from being supplied and allow sufficient heat exchange in the refrigerating chamber.

In general refrigerators, low-temperature and low-pressure refrigerants supplied by a refrigeration cycle are brought into contact with air circulating inside the refrigerator when passing through an evaporator, so that air cooled below a predetermined temperature is supplied into the refrigerator to be below a preset temperature. A device for forming a sealed space that maintains the temperature of the refrigerator, the apparatus is partitioned into a freezer compartment and a refrigerating compartment by a barrier provided inside the cabinet, and a cold air circulation system for allowing cold air supplied from the cooling compartment in which the evaporator is installed to be supplied to the freezer compartment and the refrigerating compartment. Is provided.

1 is a configuration diagram showing a cold air circulation device for a refrigerator according to the prior art.

The refrigerator according to the prior art has a compressor 1 for compressing a refrigerant at a high temperature and a high pressure, a condenser 2 for converting the refrigerant supplied from the compressor 1 to a low temperature, and a refrigerant supplied from the condenser 2 at a low temperature, a low pressure. An expansion valve 3 for converting the refrigerant into a refrigerant of the refrigerator, and a refrigerant having a low temperature and low pressure is driven by a refrigerating cycle including an evaporator 4 that absorbs heat while contacting the air inside the refrigerator. A first supply passage (8) and a first recovery passage (9) connecting the chamber (5) and the freezing chamber (6), a first blowing fan (10) provided in the first cooling passage (8), and the cooling A second supply passage 11 connecting the chamber 5 and the refrigerating chamber 7, a damper installed in the second supply passage 11 to control the amount of cold air, the refrigerating chamber 7 and the vegetable chamber 14. And a second flow path 15 connecting the vegetable chamber 14 and the cooling chamber 5 to the branch passage 13 for connecting. .

Thus, when power is applied to the compressor (1), the refrigerant is compressed to high temperature and high pressure and circulated along the refrigerant pipe, passing through the condenser (2) and the expansion valve (3) and converted into a low temperature, low pressure refrigerant to evaporator (4) ) And the air flowed by the first blower fan 10 and the refrigerant are brought into contact with the evaporator 4 in the cooling chamber 5 and cooled to a predetermined temperature or less, and then the first supply passage 8 is opened. Since the freezer compartment 6 is supplied to the freezer compartment 6, the freezer compartment 6 is maintained at or below a set temperature, and the cold air having undergone heat exchange is circulated along the first recovery passage 9 to the cooling compartment.

In addition, a portion of the cold air is supplied to the refrigerating chamber 7 according to whether or not the damper is opened, and is supplied to the refrigerating chamber 7 along the second supply passage 11 by the second blowing fan 12. The cold air which has undergone primary heat exchange in the refrigerating compartment 7 flows to the vegetable compartment 14 along the branch flow passage 13, and the cold air that has undergone secondary heat exchange in the vegetable compartment 14 follows the second recovery flow passage 15. The cooling and refrigerating operations are performed while being circulated to the cooling chamber 5.

However, since the refrigerator air circulation system for refrigerators according to the prior art has a structure in which cold air is supplied from one side of the freezing compartment 6 and the refrigerating compartment 7, the freezing compartment 6 and the refrigerating compartment which have been enlarged in accordance with the recent trend of being enlarged. Lower temperature cold air is supplied so that the inside of (7) is controlled to a uniform temperature, whereby the cold air discharged from the freezing chamber 6 and the refrigerating chamber 7 is circulated to the cooling chamber and again, despite being a relatively low temperature cold air. There is a problem in that the efficiency of the electrical energy in contact with the evaporator 4 to drive the compressor 1 is lowered.

In addition, since the cold air discharged from the discharge port side of the freezer compartment 6 and the refrigerating compartment 7 is relatively low in comparison with the ambient air temperature, moisture is generated by the temperature difference of the refrigerator in the conventional refrigerator cold air circulation system. There is a problem that the moisture is frozen.

The present invention has been made in order to solve the above problems of the prior art, by allowing the cold air discharged from the freezer compartment to be circulated to the cooling chamber after the refrigeration operation flows to the vegetable compartment, the temperature difference between the cold discharged from the freezer compartment and the ambient air It is an object of the present invention to provide a cold air circulation system for a refrigerator, which can reduce and control the vegetable compartment as an independent space.

In addition, by circulating the cold air circulating inside the refrigerating compartment to the suction side of the refrigerating compartment, there is provided a cold air circulation device for a refrigerator that can provide a temperature difference between the cold air and the ambient air discharged during the refrigerating because the sufficient heat exchange is performed inside the refrigerating compartment. There is a purpose.

Refrigerator air circulation system for a refrigerator according to the present invention for solving the above problems, the first supply passage for supplying cold air by connecting the cooling chamber and the freezer compartment with the evaporator and the first to guide the cold air heat exchanged in the freezing chamber to the cooling chamber A recovery flow path, a first blower fan provided in the first supply flow path, a discharge side of the cooling chamber and a suction side of the refrigerating chamber are connected, and a second supply flow path provided with a damper, a discharge side of the refrigerating chamber, and a suction side of the cooling chamber. A second recovery passage, a second blowing fan installed in the second supply passage, a branch passage branched from the freezer compartment and connected to the vegetable compartment, and a circulation passage connected to the second supply passage on one side of the refrigerating compartment. It features.

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

 The cold air circulation device for a refrigerator according to the present invention is connected to the cooling chamber 50 in which the evaporator 58 is installed and the freezing chamber 60 to supply cold air, and the heat exchanged in the freezing chamber 60. A first recovery passage 64 for guiding cold air to the cooling chamber 50, a first blowing fan 70 provided in the first supply passage 62, a discharge side of the cooling chamber 50, and a refrigerating chamber 80 And a second recovery flow path 84 connecting the suction side of the second supply path 82 and the discharge side of the refrigerating chamber 80 and the suction side of the cooling chamber 50 to which the first damper 88 is installed. A second blowing fan 86 installed in the second supply passage 82, a branch passage 90 connected to the vegetable compartment 94 by being branched from the freezing chamber 60, and on one side of the refrigerating chamber 80. A circulation passage 100 connected to the second supply passage 82 is included.

Thus, when the refrigerator is driven, low-temperature and low-pressure refrigerant is supplied to the evaporator 58, and the air inside the cooling chamber 50 flows along the first supply passage 62 while the first blowing fan 70 is driven. 60, which is circulated to the cooling chamber 50 along the first recovery passage 64 and in contact with the refrigerant passing through the inside of the evaporator 58, is cooled to a temperature below a predetermined temperature and is supplied into the freezing chamber 60. do.

In addition, the branch passage 90 is provided with a second damper 92, and the first damper 88 and the second damper 92 are opened in a predetermined amount and are supplied to the freezing chamber 60 and the freezing chamber ( In the cold air circulating 60, a portion of the cold air flows into the refrigerating chamber 80 and the vegetable chamber 94, and the cold air flowing along the second supply passage 82 by the second blowing fan 86 is refrigerated chamber ( 80 is supplied into the interior, and the cold air flowing along the branch flow path 90 through the second damper 92 flows into the vegetable chamber 94.

As the cold air supplied from the freezer compartment 60 is supplied to the vegetable compartment 94, the control of the vegetable compartment 94 may be performed separately. For example, the low temperature storage is controlled by controlling the temperature lower than that of the refrigerator compartment 80. Food and beverages can be stored, and the degree of opening of the second damper 92 can be adjusted to control the temperature higher than that of the refrigerating chamber 80.

In addition, the circulation passage 100 includes an upper circulation passage 102 connecting the upper one side of the refrigerating chamber 80 and the second supply passage 82, and the lower one side and the second supply of the refrigerating chamber 80. Since the lower circulation passage 104 connecting the passage 82 is included, the cold air supplied into the refrigerating compartment 80 along the second supply passage 82 circulates inside the refrigerating compartment 80, and an upper portion thereof. The side cold air is circulated along the upper circulation passage 102 to the second supply passage 82, and the lower side cold air of the refrigerating compartment 80 is circulated to the second supply passage 82 along the lower circulation passage 104. Since the cold air circulating (80) is circulated a number of times within a predetermined time, the effect of improving the heat exchange efficiency appears.

Looking at the operation of the cold air circulation device for a refrigerating air according to the present invention configured as described above are as follows.

First, when the operation of the refrigerator is started, the compressor 52 is driven to compress the refrigerant at a high temperature and a high pressure, and the refrigerant supplied from the compressor 52 passes through the condenser 54 and the expansion valve 56 while passing the low temperature and low pressure. Is converted into a refrigerant and supplied to the evaporator 58.

At the same time, since the first blower fan 70 is driven, the air in the cooling chamber 50 is changed in temperature to air below a predetermined temperature while being in contact with the evaporator 58, and thus the freezing chamber 60 along the first supply passage 62. Flows to the cooling chamber 50 after the heat exchange with air and food in the freezing chamber 60 and along the first recovery passageway 64.

At this time, a portion of the cold air circulating in the freezing chamber 60 is the cold air flows along the branch flow path 90 when the second damper 92 is opened to perform the refrigeration operation of the vegetable chamber 94, after which the third recovery flow path Since along the 96 flows to the cooling chamber 50, the cold air supplied to the freezing chamber 60 is sufficiently heat exchanged and recovered to the cooling chamber 50, thereby improving the heat exchange efficiency.

Of course, a third blowing fan may be installed in the branch passage 90 to allow cold air to flow into the vegetable chamber 94.

In addition, since the first damper 88 is also opened, cold air flows along the second supply passage 82 by the driving of the second blower fan 86 so that cold air is supplied to the refrigerating chamber 80, and the refrigerating chamber ( The cold air circulated through 80 is circulated to the cooling chamber 50 along the second recovery passageway 84.

In addition, since the cold air circulating in the refrigerating chamber 50 is cooled by the upper circulation passage 102 and the lower circulation passage 104, the cold air is circulated back to the second supply passage 82 so that the heat exchange is not completely performed. Is once again circulated to the refrigerating compartment 80, thereby improving heat exchange efficiency and at the same time reducing the temperature difference between the outlet side temperature and the external temperature of the refrigerating compartment 80, so that moisture is generated on the outlet side of the refrigerating compartment 80. Can be prevented.

Since the cold air supplied through the evaporator 58 by the operation as described above performs a complete heat exchange in the freezing chamber 60 and the refrigerating chamber 80, and flows to the cooling chamber 50 in a state of being raised above a predetermined temperature, the heat exchange. Efficiency is maximized to reduce the electrical energy required to drive the compressor (52).

The cold air circulation device for a refrigerator according to the present invention configured as described above allows the cold air circulating inside the freezer compartment to be supplied to the vegetable compartment, so that the temperature control of the vegetable compartment can be controlled separately from the refrigerator compartment, so that a separate refrigerator internal space is provided. There is an advantage to achieve a variety of uses.

In addition, since sufficient heat exchange is performed between the air inside the freezing compartment and the refrigerating compartment and the cold air supplied from the cooling compartment, the temperature difference between the discharged cold air and the surrounding air is reduced, thereby preventing the occurrence of moisture on the discharge port side of the freezing compartment and the refrigerating compartment. There is an advantage that can prevent the malfunction and breakage caused by the generation of moisture and freezing.

Claims (3)

A first supply passage connecting the cooling chamber in which the evaporator is installed and the freezing chamber to supply cold air, and a first recovery passage configured to guide the cold air heat-exchanged in the freezing chamber to the cooling chamber; A first blowing fan installed in the first supply passage; A second supply passage connecting the discharge side of the cooling chamber and the suction side of the refrigerating chamber, and connecting the second supply passage provided with a damper and the discharge side of the refrigerating chamber and the suction side of the cooling chamber; A second blowing fan installed in the second supply passage; A branching passage branched from the freezer compartment and connected to the vegetable compartment; Refrigerating air circulation apparatus for a refrigerator, characterized in that a circulation passage connected to the second supply passage on one side of the refrigerating chamber. The method of claim 1; The branch flow passage, a cold air circulation device for a refrigerator, characterized in that the second damper is installed. The method of claim 1; The circulation passage includes a upper circulation passage connecting the upper side and the second supply passage of the refrigerating compartment, and a lower circulation passage connecting the lower side of the refrigerating compartment and the second supply passage. Cold air circulation system.

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