KR20070108232A - A cooling device - Google Patents

A cooling device Download PDF

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Publication number
KR20070108232A
KR20070108232A KR1020077020399A KR20077020399A KR20070108232A KR 20070108232 A KR20070108232 A KR 20070108232A KR 1020077020399 A KR1020077020399 A KR 1020077020399A KR 20077020399 A KR20077020399 A KR 20077020399A KR 20070108232 A KR20070108232 A KR 20070108232A
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South Korea
Prior art keywords
air channel
compressor
air
cooling
evaporator
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KR1020077020399A
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Korean (ko)
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KR100908021B1 (en
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터게이 얼칸
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아세릭 에이. 에스
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/04—Preventing the formation of frost or condensate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
    • F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
    • F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
    • F25D17/062—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation in household refrigerators
    • F25D17/065—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation in household refrigerators with compartments at different temperatures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/06—Removing frost
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/025—Compressor control by controlling speed
    • F25B2600/0251—Compressor control by controlling speed with on-off operation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/11—Fan speed control
    • F25B2600/112—Fan speed control of evaporator fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
    • F25D2317/06—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation
    • F25D2317/065—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the air return
    • F25D2317/0653—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation characterised by the air return through the mullion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
    • F25D2400/02—Refrigerators including a heater
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
    • F25D2400/04—Refrigerators with a horizontal mullion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/14—Sensors measuring the temperature outside the refrigerator or freezer

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Defrosting Systems (AREA)
  • Freezers Or Refrigerated Showcases (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

The present invention relates to a cooling device (1) comprising an air channel (6) which is prevented from being blocked by frosting.

Description

냉각 장치{A COOLING DEVICE}Cooling unit {A COOLING DEVICE}

본 발명은 서리 형성으로 인한 차단이 방지되는 공기 채널을 포함하는 냉각 장치에 관한 것이다.The present invention relates to a cooling device comprising an air channel in which blocking due to frost formation is prevented.

당해기술에 있어서, 2개의 격실, 즉 냉장실과 냉동실을 포함하는 냉각 장치가 있다. 이러한 유형의 냉각 장치에 있어서, 팬의 도움으로 증발기를 통과한 냉각된 공기 중 일부는 냉장실 내에서 그리고 그 나머지는 냉동실 내에서 순환된다. 냉장실 내에서의 순환을 완료한 후에, 공기는 공기 채널을 통과하여 다시 냉동실에 도달한다.In the art, there is a cooling device comprising two compartments, a refrigerating compartment and a freezing compartment. In this type of cooling device, some of the cooled air that has passed through the evaporator with the aid of a fan is circulated in the refrigerating compartment and the other in the freezing compartment. After completing the circulation in the refrigerating compartment, the air passes through the air channel again to the freezing compartment.

특히 낮은 주위 온도의 경우, 팬이 정지함에 따라, 증발기 챔버 내의 냉각 공기는 공기 채널 쪽으로 유동하여, 온도를 물의 응결점 이하로 낮춘다. 팬이 다시 작동을 개시하면, 냉장실 내의 비교적 습기 있고 고온의 공기가 공기 채널을 통해 증발기 쪽으로 지향되기 시작한다. 그러나, 고온 공기가 증발기의 비작동 주기 동안에 냉각되는 채널을 통과함에 따라, 공기의 습도는 응축되고, 이로써 냉각 표면 상에서 응결하고, 잠시 후에 공기 채널 내에 축적되는 서리의 양이 증가된다. 이것은 냉장실로부터 증발기 챔버로 이송되는 공기의 양을 차례로 감소시키게 되고, 이로써 냉장실을 불충분하게 냉각시킨다. Especially at low ambient temperatures, as the fan stops, cooling air in the evaporator chamber flows toward the air channel, lowering the temperature below the water's freezing point. When the fan starts to operate again, relatively moist and hot air in the fridge begins to be directed through the air channel towards the evaporator. However, as hot air passes through the channel to be cooled during the non-operational cycle of the evaporator, the humidity of the air condenses, thereby condensing on the cooling surface, and after a while the amount of frost that accumulates in the air channel is increased. This in turn reduces the amount of air transferred from the refrigerating compartment to the evaporator chamber, thereby insufficiently cooling the refrigerating compartment.

미국 특허 제 3,826,103 호 및 제 5,255,536 호, 또한 유럽 특허 제 EP644385 호에는 공기 채널 내에 히터를 포함하는 냉각 장치가 개시되어 있다.U.S. Patent Nos. 3,826,103 and 5,255,536, and also European Patent EP644385, disclose a cooling device comprising a heater in an air channel.

본 발명의 목적은 공기 채널 내에서의 서리 문제를 없앤 냉각 장치를 설계하는 것이다.It is an object of the present invention to design a cooling device which eliminates the frost problem in the air channel.

본 발명의 목적을 충족하도록 설계된 냉각 장치를 첨부된 도면에 도시한다.A cooling device designed to meet the objects of the invention is shown in the accompanying drawings.

도 1은 냉각 장치의 개략적인 측면도,1 is a schematic side view of a cooling device,

도 2는 냉각 장치의 다른 실시예의 개략적인 측면도.2 is a schematic side view of another embodiment of a cooling device.

도면에 나타낸 구성요소는 다음과 같다.The components shown in the drawings are as follows.

1 : 냉각 장치 2 : 냉동실1: cooling device 2: freezer

3 : 냉장실 4 : 압축기3: refrigerator compartment 4: compressor

5 : 증발기 6 : 공기 채널5: evaporator 6: air channel

7 : 제상 유닛 8 : 팬7: defrost unit 8: fan

9 : 제어 유닛 10 : 증발기 챔버9: control unit 10: evaporator chamber

11 : 히터11: heater

본 발명의 냉각 장치(1)는, The cooling device 1 of the present invention,

- 냉각 사이클 내에 있는 냉매 유체를 압축 및 순환시키는 압축기(4);A compressor 4 for compressing and circulating refrigerant fluid in the cooling cycle;

- 냉각 목적으로 음식을 저장하는 냉장실(3);A refrigerating compartment 3 for storing food for cooling purposes;

- 냉동 목적으로 음식을 저장하고 냉장실(3)보다 낮은 온도로 유지되는 냉동실(2);A freezer compartment (2) which stores food for freezing purposes and is kept at a lower temperature than the freezer compartment (3);

- 매체로부터 냉매 유체로 열을 전달하는 적어도 하나의 증발기(5);At least one evaporator 5 transferring heat from the medium to the refrigerant fluid;

- 냉장실(3)과 증발기(5) 사이의 공기 통로용인 적어도 하나의 공기 채널(6); 및At least one air channel 6 for the air passage between the refrigerating compartment 3 and the evaporator 5; And

- 압축기(4)의 오프(off) 기간 동안 주위 온도(T)가 소정값(Tset) 아래이면, 공기 채널(6)의 온도가 물의 응결점 이하로 떨어지는 것을 방지함으로써 공기 채널(6) 내에 서리가 형성되는 것을 방지하는 제상 유닛(7);을 포함한다(도 1).If the ambient temperature T is below a predetermined value Tset during the off period of the compressor 4, frost in the air channel 6 by preventing the temperature of the air channel 6 from dropping below the water freezing point. A defrosting unit 7 which prevents the formation of (FIG. 1).

본 발명의 바람직한 실시예에 있어서, 냉각 장치(1)는 증발기(5)가 배치되는 증발기 챔버(10)를 포함하며, 이 증발기 챔버(10)는 벽에 의해 냉동실(2)과 분리되고 공기 채널(6)에 의해 냉장실(3)에 연결된다.In a preferred embodiment of the present invention, the cooling device 1 comprises an evaporator chamber 10 in which an evaporator 5 is arranged, which is separated from the freezer compartment 2 by a wall and has an air channel. It is connected to the refrigerating chamber 3 by (6).

냉각 장치(1)는 주위 온도에 대한 정보를 직간접적으로 모으는 제어 유닛(9)을 포함한다.The cooling device 1 comprises a control unit 9 which directly or indirectly collects information about the ambient temperature.

본 발명의 일 실시예에 있어서, 제어 유닛(9)은 주위 온도를 직접 측정하는 열 센서를 포함한다. 온도(T)가 소정값(Tset), 예컨대 1-5℃ 아래로 떨어지면, 제어 유닛(9)은 공기 채널(6) 내에 서리 형성에 대한 위험이 있는지를 판별한다.In one embodiment of the invention, the control unit 9 comprises a thermal sensor that directly measures the ambient temperature. If the temperature T falls below a predetermined value Tset, for example 1-5 ° C., the control unit 9 determines whether there is a risk of frost formation in the air channel 6.

본 발명의 다른 실시예에 있어서, 제어 유닛(9)은 압축기(4)의 오프 시간(toff) 및 가동 시간(ton)을 측정하고, 가동 시간(ton) 대 총 시간(ton+toff)의 비율인 가동 시간 비율(ton/(ton+toff))이 소정값, 예컨대 30-40% 아래로 떨어지면, 공기 채널(6) 내에서 서리가 발생되기에 주위 온도가 너무 낮은지의 여부를 판별한다.In another embodiment of the invention, the control unit 9 measures the off time (toff) and the running time (ton) of the compressor (4), and the ratio of the running time (ton) to the total time (ton + toff) When the phosphorus uptime ratio ton / (ton + toff) falls below a predetermined value, for example 30-40%, it is determined whether the ambient temperature is too low for frost to occur in the air channel 6.

본 발명의 일 실시예에 있어서, 제상 유닛(7)은 압축기(4)의 오프 기간 동안에 작동되는 적어도 하나의 팬(8)을 포함하며, 주위 온도에 의해 공기 채널(6) 내에 서리가 발생할 수 있다고 판별하면, 증발기 챔버(10) 내의 냉각 공기가 공기 채널(6) 내로 흐르는 것을 방지한다. 팬(8)은 또한 압축기(4)가 작동하고 있는 동안 공기를 순환시킬 수 있다. 팬(8)은 압축기(4)가 온/오프되는 동안 동일한 회전 속도로 작동될 수 있거나, 또는 압축기(4)의 정지 후에 보다 낮은 속도로 작동될 수 있다.In one embodiment of the invention, the defrost unit 7 comprises at least one fan 8 which is operated during the off period of the compressor 4, in which frost can occur in the air channel 6 by the ambient temperature. If so, the cooling air in the evaporator chamber 10 is prevented from flowing into the air channel 6. The fan 8 can also circulate air while the compressor 4 is operating. The fan 8 may be operated at the same rotational speed while the compressor 4 is on / off, or may be operated at a lower speed after the compressor 4 is stopped.

주위 온도가 소정값(T<Tset) 아래이면, 제상 유닛(7)은 압축기(4)가 정지한 후에 온(on)으로 된다. 제상 유닛(7)은 압축기(4)의 오프 기간 동안에 팬(8)을 작동시킴으로써, 냉동실(2) 내에 있는 공기가 공기 채널(6) 내로 흐르는 것을 방지하고 공기 채널(6)의 온도를 낮춘다. 팬(8)은 냉장실(3)로부터 공기 채널(6)로 그리고 공기 채널(6)로부터 증발기(5)쪽으로 공기를 순환시킨다. 이로써, 압축기(4)와 팬(8)이 다시 작동을 개시하면, 냉장실(3)로부터 나온 고온 공기 내에 있는 습기는 응축하여 서리 형성이 방지된다.If the ambient temperature is below the predetermined value T <Tset, the defrost unit 7 is turned on after the compressor 4 stops. The defrost unit 7 operates the fan 8 during the off period of the compressor 4, thereby preventing the air in the freezer compartment 2 from flowing into the air channel 6 and lowering the temperature of the air channel 6. The fan 8 circulates air from the refrigerating compartment 3 to the air channel 6 and from the air channel 6 toward the evaporator 5. As a result, when the compressor 4 and the fan 8 start operation again, moisture in the hot air from the refrigerating chamber 3 condenses to prevent frost formation.

본 발명의 또다른 실시예에 있어서, 제상 유닛(7)은, 주위 온도가 공기 채널(6) 내에 서리를 발생시킬 수 있다고 제어 유닛(9)이 판별하면, 압축기(4)가 정지한 후에 작동을 개시하는 히터(11)를 포함한다. 히터(11)는 공기 채널(6) 내에 배치된다. 히터(11)는 팬(8)만으로 또는 팬(8)과 함께 작동될 수 있다.In another embodiment of the invention, the defrost unit 7 is operated after the compressor 4 has stopped, if the control unit 9 determines that the ambient temperature can generate frost in the air channel 6. It includes a heater 11 for starting. The heater 11 is arranged in the air channel 6. The heater 11 can be operated with the fan 8 alone or with the fan 8.

주위 온도가 소정값(T<Tset) 아래로 떨어지면, 제상 유닛(7)은 압축기(4)가 정지한 후에 작동을 개시하고, 압축기(4)의 오프 기간 동안에 공기 채널(6)을 가열함으로써, 증발기 챔버(10)로부터 흐르는 공기가 공기 채널(6)을 냉각시키는 것을 방지한다. 이러한 방식에 있어서, 공기 채널(6)의 온도는 물의 응결 온도 아래로 떨어지는 것이 방지되고, 압축기(4)와 팬(8)이 다시 작동을 개시하면 냉장실(3)로부터 흐르는 고온 공기 중의 습기는 응축되어 서리 형성이 방지된다.When the ambient temperature falls below a predetermined value T <Tset, the defrost unit 7 starts operation after the compressor 4 stops, and heats the air channel 6 during the off period of the compressor 4, Air flowing from the evaporator chamber 10 prevents cooling the air channel 6. In this way, the temperature of the air channel 6 is prevented from falling below the condensation temperature of the water, and when the compressor 4 and the fan 8 start operation again, the moisture in the hot air flowing from the refrigerating chamber 3 condenses. Thus frost formation is prevented.

본 발명의 냉각 장치(1)에 있어서, 낮은 주위 온도에서의 공기 채널(6)에 서리 형성은 압축기(4)의 오프 기간 동안에 팬(8) 또는 히터(11)를 작동시킴으로써 방지된다. 이로써 공기 채널(6)의 차단 문제는 해결된다.In the cooling device 1 of the present invention, frost formation in the air channel 6 at low ambient temperature is prevented by operating the fan 8 or the heater 11 during the off period of the compressor 4. This solves the problem of blocking the air channel 6.

Claims (5)

냉각 장치(1)에 있어서,In the cooling device (1), 냉각 사이클 내에 있는 냉매 유체를 압축 및 순환시키는 압축기(4);A compressor (4) for compressing and circulating refrigerant fluid in the cooling cycle; 냉각 목적으로 음식을 저장하는 냉장실(3);A refrigerating compartment (3) for storing food for cooling purposes; 냉동 목적으로 음식을 저장하고 상기 냉장실(3)보다 낮은 온도로 유지되는 냉동실(2);A freezer compartment (2) for storing food for freezing purposes and maintaining at a lower temperature than the cold compartment (3); 매체로부터 냉매 유체로 열을 전달하는 적어도 하나의 증발기(5);At least one evaporator (5) for transferring heat from the medium to the refrigerant fluid; 상기 냉장실(3)과 상기 증발기(5) 사이의 공기 통로용인 적어도 하나의 공기 채널(6); 및At least one air channel (6) for an air passage between the refrigerating compartment (3) and the evaporator (5); And 압축기(4)의 오프 기간 동안 주위 온도(T)가 소정값(Tset) 아래이면, 공기 채널(6)의 온도가 물의 응결점 이하로 떨어지는 것을 방지함으로써 공기 채널(6) 내에 서리가 형성되는 것을 방지하는 제상 유닛(7);을 포함하는 냉각 장치.If the ambient temperature T is below a predetermined value Tset during the off period of the compressor 4, frost is formed in the air channel 6 by preventing the temperature of the air channel 6 from falling below the dew point of water. Cooling device comprising; defrost unit (7) to prevent. 제1항에 있어서,The method of claim 1, 상기 압축기(4)의 오프 기간 동안에 작동되고 상기 냉장실(3)로부터 상기 공기 채널(6) 내로 그리고 상기 공기 채널(6)로부터 상기 증발기(5) 쪽으로 공기를 순환시키는 팬(8)을 포함하는 제상 유닛(7)은, 상기 압축기(4)가 작동하지 않은 경우 상기 증발기 챔버(10) 내에 있는 냉각 공기가 상기 공기 채널(6) 내로 흐르는 것을 방지하는 것을 특징으로 하는 냉각 장치.Defrost comprising a fan 8 which is operated during the off period of the compressor 4 and circulates air from the refrigerating compartment 3 into the air channel 6 and from the air channel 6 towards the evaporator 5. The unit (7) is characterized in that when the compressor (4) is not in operation, cooling air in the evaporator chamber (10) is prevented from flowing into the air channel (6). 제2항에 있어서,The method of claim 2, 상기 압축기(4)가 정지한 후에 상기 팬(8)의 회전 속도가 감소되는 상기 팬(8)을 포함하는 제상 유닛(7)인 것을 특징으로 하는 냉각 장치.And a defrost unit (7) comprising the fan (8) in which the rotational speed of the fan (8) is reduced after the compressor (4) is stopped. 제1항에 있어서,The method of claim 1, 상기 압축기(4)가 정지한 후에 작동을 개시하여 상기 공기 채널(6)을 가열하는 히터(11)를 포함하는 제상 유닛(7)인 것을 특징으로 하는 냉각 장치.And a defrost unit (7) comprising a heater (11) for starting operation after the compressor (4) stops and heating the air channel (6). 제1항 내지 제4항 중 어느 한 항에 있어서,The method according to any one of claims 1 to 4, 상기 압축기(4)의 오프 시간(toff) 및 가동 시간(ton)을 측정하고, 또 상기 가동 시간(ton) 대 총 시간(ton+toff)의 비율인 가동 시간 비율(ton/(ton+toff))이 소정값 아래로 떨어지면, 상기 공기 채널(6) 내에서 서리가 발생되기에 주위 온도가 너무 낮은지를 판별하는 제어 유닛(9)을 포함하는 것을 특징으로 하는 냉각 장치.The off time toff and the up time ton of the compressor 4 are measured, and the up time ratio ton / (ton + toff) is a ratio of the up time to the total time ton + toff. Cooling unit, characterized in that the control unit (9) determines if the ambient temperature is too low for frost to occur in the air channel (6) if it falls below a predetermined value.
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