KR100219430B1 - Method for preventing over-freezing of a refrigerator - Google Patents

Method for preventing over-freezing of a refrigerator Download PDF

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Publication number
KR100219430B1
KR100219430B1 KR1019970056350A KR19970056350A KR100219430B1 KR 100219430 B1 KR100219430 B1 KR 100219430B1 KR 1019970056350 A KR1019970056350 A KR 1019970056350A KR 19970056350 A KR19970056350 A KR 19970056350A KR 100219430 B1 KR100219430 B1 KR 100219430B1
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South Korea
Prior art keywords
temperature
refrigerator
fan
evaporator
turning
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KR1019970056350A
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Korean (ko)
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KR19990034690A (en
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권영운
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윤종용
삼성전자주식회사
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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
    • F25D29/00—Arrangement or mounting of control or safety devices
    • 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
    • F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
    • F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
    • F25D11/022—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures with two or more evaporators
    • 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
    • F25D21/002—Defroster control
    • F25D21/004—Control mechanisms
    • 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
    • F25D21/08—Removing frost by electric heating
    • 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
    • F25D2600/00—Control issues
    • F25D2600/06—Controlling according to a predetermined profile
    • 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
    • F25D2700/10—Sensors measuring the temperature of the evaporator
    • 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
    • F25D2700/12—Sensors measuring the inside temperature
    • 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

Abstract

개시된 냉장고 제어방법은 외부온도가 소정온도 이하로 낮아질 경우에 냉장실이 과냉되는 것을 방지하도록 한 냉장고의 과냉 방지방법에 관한 것이다. 본 발명은 냉장고의 고내온도, 외기온도 및 증발기온도를 검출하고, 이에 따라 팬을 온/오프시킴으로써 고내의 과냉을 방지하도록 하는 방법에 있어서, 키 입력에 의해 냉장고의 운전을 개시한 상태하에서 외기온도가 소정온도 이하가 아니고 압축기 및 팬이 오프상태가 아닐 경우 정상상태 제어모드를 수행하는 한편, 외기온도가 소정온도 이하이고 압축기 및 팬이 오프상태일 경우 과냉방지 제어모드를 수행하되, 냉장실 증발기 온도가 미리 설정된 고내 기준온도보다 낮을 경우에 제상히터를 온시킴으로써 상기한 냉장실 증발기 온도를 미리 설정된 고내 기준온도보다 높인 상태에서 냉장실 팬을 온시켜 키도록 한다.The disclosed refrigerator control method relates to a method for preventing overcooling of a refrigerator to prevent the refrigerating compartment from being overcooled when the external temperature is lowered below a predetermined temperature. The present invention provides a method for detecting the inside temperature of the refrigerator, the outside air temperature and the evaporator temperature, and thus preventing the inside of the refrigerator from being cooled by turning the fan on and off. If the temperature is not below the predetermined temperature and the compressor and the fan are not in the off state, the steady state control mode is performed, while when the outside temperature is below the predetermined temperature and the compressor and the fan are in the off state, the anti-cooling control mode is performed. When the defrost heater is lower than the preset internal reference temperature, the refrigerator compartment fan is turned on in the state where the refrigerator compartment evaporator temperature is higher than the preset internal reference temperature.

Description

냉장고의 과냉 방지방법How to prevent overcooling of the refrigerator

본 발명은 냉장고의 제어방법에 관한 것으로서, 더욱 상세하게는 외부온도가 소정온도 이하로 낮아질 경우에 냉장실이 과냉되는 것을 방지하도록 한 냉장고의 과냉 방지방법에 관한 것이다.The present invention relates to a control method of a refrigerator, and more particularly, to a method of preventing overcooling of a refrigerator to prevent the refrigerating compartment from being overcooled when the external temperature is lowered below a predetermined temperature.

일반적으로 냉장고는 그 내부에 보관된 음식물을 냉장 또는 냉동하여 장기간 보관할 수 있도록 하는 것으로서, 이러한 냉장고의 고내 즉, 냉장실 및 냉동실에는 증발기와 팬(fan)이 각각 설치된다. 증발기는 압축기가 작동될 때 그 내부에 순환되는 냉매의 열교환작용으로 주변 공기를 냉각시키고, 팬은 증발기 주위에서 냉각된 공기를 고내로 강제 토출시키기 위한 것이다. 따라서, 온도 변화에 따라 이 압축기와 팬의 작동을 제어함으로써 고내의 적정한 온도를 유지하게 된다.In general, the refrigerator is to be stored for a long time by refrigerated or frozen food stored therein, that is, the refrigerator, the freezer compartment and the freezer compartment of the refrigerator is provided with an evaporator (fan), respectively. The evaporator cools the surrounding air by the heat exchange action of the refrigerant circulated therein when the compressor is operated, and the fan is forcibly discharging the cooled air around the evaporator into the air. Therefore, by controlling the operation of the compressor and the fan according to the temperature change, it is possible to maintain the proper temperature in the refrigerator.

이와 같은 일반적인 냉장고 고내의 냉기순환계통을 도 1을 참조하여 설명하면, 먼저 냉장고는 냉동실(13)과 냉장실(1)로 구획되고, 이의 전방에 각각의 문(22)(4)이 달려 있어 이 문(22)(4)들이 닫히면 냉동실(13) 및 냉장실(1)은 각각 밀폐된다.Referring to FIG. 1, a cold air circulation system in a conventional refrigerator refrigerator is first divided into a freezing compartment 13 and a refrigerating compartment 1, and each door 22, 4 is provided in front of the refrigerator. When the doors 22 and 4 are closed, the freezer compartment 13 and the refrigerating compartment 1 are each sealed.

또한, 상기한 냉동실(13) 및 냉장실(1)은 그 상부에 증발기(11)(14) 및 팬(15)(16)이 각각 마련되고, 아울러 통상 복수개의 선반(미도시)들에 의해 다층으로 구획되어 식품이 보관된다. 따라서, 상기한 증발기(11)(14)에 의하여 냉각된 공기, 즉 냉기는 각각의 팬(15)(16)에 의하여 냉동실(13) 및 냉장실(1) 쪽으로 강제 토출되어 상기한 식품을 적정한 온도에서 냉장 또는 냉동 보관하게 된다.In addition, the freezer compartment 13 and the refrigerating compartment 1 are each provided with an evaporator 11, 14 and a fan 15, 16 at the upper portion thereof, and is usually multi-layered by a plurality of shelves (not shown). The food is stored in compartments. Accordingly, the air cooled by the evaporators 11 and 14, ie, the cold air, is forcibly discharged to the freezing chamber 13 and the refrigerating chamber 1 by the respective fans 15 and 16 so that the food is brought to an appropriate temperature. Refrigerated or frozen at

여기서, 각각의 증발기(11)(14)는 냉장고 저면에 장착되는 압축기(17)와 연결되어 냉매회로를 이루며, 이 압축기(17)가 작동됨으로 냉매가 순환되고, 이에 따라 증발기(11)(14)에 유입된 액냉매는 주위로부터 증발잠열을 빼앗아 냉각작용을 수행한다. 또한, 상기한 증발기(11)(14) 근방에는 그 표면에 발생되는 성애를 제거하기 위한 각각의 히터(20)(21)가 마련된다.Here, each of the evaporators 11 and 14 is connected to a compressor 17 mounted on the bottom of the refrigerator to form a refrigerant circuit, and the refrigerant 17 is circulated by operating the compressor 17, and thus the evaporators 11 and 14 are circulated. Liquid refrigerant introduced into) takes the latent heat of evaporation from the surroundings and performs cooling. In addition, the heaters 20 and 21 are provided in the vicinity of the evaporators 11 and 14 to remove the frost generated on the surface thereof.

최근에 널리 사용되고 있는 냉장고는 마이컴(미도시)과 온도센서(18)(19)를 사용하여 상기한 압축기(17) 및 팬(15)(16) 등의 냉장고 부하들을 자동적으로 제어하는 전자제어방식으로 운전되고 있다. 즉, 마이컴(미도시)은 온도센서(18)(19)로부터 고내온도의 변화를 감지하고, 이렇게 감지된 온도가 사용자에 의하여 설정된 범위 이상으로 상승되면 팬(15)(16)을 작동시키고, 이후 고내온도가 설정범위 이하로 하강되면 팬(15)(16)의 작동을 중지시킴으로써, 냉동실(13) 및 냉장실(1)을 각각의 식품이 보관되기 적정한 온도로 유지하게 된다.Recently, a refrigerator that has been widely used is an electronic control method that automatically controls refrigerator loads such as the compressor 17 and the fan 15, 16 using a microcomputer (not shown) and a temperature sensor 18, 19. Is being driven. That is, the microcomputer (not shown) detects a change in the internal temperature from the temperature sensors 18 and 19, and operates the fans 15 and 16 when the detected temperature rises above the range set by the user. Then, when the internal temperature is lowered below the set range, by stopping the operation of the fan 15, 16, the freezer compartment 13 and the refrigerating compartment 1 is maintained at an appropriate temperature for storing each food.

도 2는 이와 같은 종래 냉장고의 고내온도 제어방법을 나타낸 제어 흐름도로서, 도시된 바와 같이 사용자에 의해 키 입력이 수행되면, 압축기(17) 및 증발기(11)(14) 등의 냉장고 부하가 구동됨으로써 냉장 및 냉동 운전이 수행된다(S101∼S102).FIG. 2 is a control flowchart illustrating a method for controlling a high temperature inside a conventional refrigerator. When a key is input by a user as illustrated, a refrigerator load such as a compressor 17 and an evaporator 11 and 14 is driven. Refrigeration and freezing operations are performed (S101 to S102).

아울러, 마이컴(미도시)은 냉장실(1) 및 냉동실(13)의 팬(16)(15)을 온시켜, 증발기(11)(14) 주위의 냉기를 각각의 냉장실(1) 및 냉동실(13)로 강제 토출시킴으로써 고내의 온도를 강하시킨다(S103). 여기서, 상기한 각각의 팬(16)(15)은 냉동실(13) 및 냉장실(1)의 온도에 따라 각기 독립적으로 제어됨이 바람직하다.In addition, the microcomputer (not shown) turns on the fans 16 and 15 of the refrigerating chamber 1 and the freezing chamber 13 to cool the air around the evaporators 11 and 14 to the refrigerating chamber 1 and the freezing chamber 13, respectively. By forcibly discharging to lower the temperature in the refrigerator (S103). Here, each of the fans 16 and 15 is preferably controlled independently of each other according to the temperatures of the freezing chamber 13 and the refrigerating chamber 1.

이후, 마이컴(미도시)은 온도센서(19)를 통하여 고내의 온도, 특히 냉장실(1)의 온도가 사용자에 의해 설정된 기준온도 이하로 낮아질 경우 냉장실(1)의 팬(16)을 오프시켜 고내온도를 더 이상 낮아지지 않도록 한다. 따라서, 이와 같이 고내온도에 따라 냉장실 팬(16)을 온 또는 오프시킴으로써 냉장실(1)이 적정온도로 유지되도록 하는 것이다(S104∼S105).Thereafter, the microcomputer (not shown) turns off the fan 16 of the refrigerating compartment 1 when the temperature in the refrigerator, especially the temperature of the refrigerating compartment 1, becomes lower than the reference temperature set by the user through the temperature sensor 19. Do not lower the temperature anymore. Therefore, the refrigerating compartment 1 is maintained at an appropriate temperature by turning on or off the refrigerating compartment fan 16 according to the high internal temperature (S104 to S105).

그러나, 이러한 종래의 냉장고에 있어서, 상기한 바와 같이 냉장실의 온도가 설정온도 이하로 되어 냉장실 팬이 오프된 상태하에서 외부온도가 소정온도 이하로 낮아질 경우에는 이 냉장실의 온도를 더 이상 제어할 수 없음으로 상기한 냉장실이 과냉되는 문제점이 있었다.However, in such a conventional refrigerator, when the temperature of the refrigerating compartment becomes lower than the set temperature as described above and the refrigerating compartment fan is turned off and the external temperature becomes lower than the predetermined temperature, the temperature of the refrigerating compartment can no longer be controlled. As a result, there was a problem that the refrigerating compartment was overcooled.

이와 같은 문제점을 해결하기 위한 본 발명의 목적은, 외부온도가 소정온도 이하로 낮아질 경우에 제상히터를 이용하여 냉장실이 과냉되는 것을 방지하도록 한 냉장고의 과냉 방지방법을 제공하는데 있다.An object of the present invention for solving such a problem is to provide a method for preventing the overcooling of a refrigerator to prevent the refrigerating compartment from being overcooled by using a defrost heater when the external temperature is lowered below a predetermined temperature.

도 1은 일반적인 냉장고를 나타낸 부분 절제 사시도,1 is a partial ablation perspective view showing a typical refrigerator,

도 2는 종래 냉장고의 고내온도 제어방법을 나타낸 제어 흐름도,2 is a control flowchart illustrating a method for controlling a high temperature inside a conventional refrigerator;

도 3은 본 발명에 따른 냉장고의 과냉 방지방법의 바람직한 실시예를 나타낸 제어 흐름도이다.3 is a control flowchart illustrating a preferred embodiment of a method for preventing overcooling of a refrigerator according to the present invention.

* 도면의 주요부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

1 : 냉장실 4, 22 : 도어1: refrigerator 4, 22: door

11, 14 : 증발기 13 : 냉동실11, 14: evaporator 13: freezer

15, 16 : 팬 17 : 압축기15, 16: fan 17: compressor

18, 19 : 온도센서 20, 21 : 히터18, 19: temperature sensor 20, 21: heater

상기한 목적을 달성하기 위한 본 발명에 따른 냉장고의 과냉 방지방법의 특징은, 냉장고의 고내온도, 외기온도 및 증발기온도를 검출하고, 이에 따라 팬을 온/오프시킴으로써 고내의 과냉을 방지하도록 하는 방법에 있어서, 키 입력에 의해 냉장고의 운전이 개시되는 제 1과정; 상기 제 1과정에 의한 냉장고 운전중 외기온도가 소정온도 이하가 아니고 압축기 및 팬이 오프상태가 아닐 경우 정상상태 제어모드를 수행하는 제 2과정; 및 상기 제 2과정에 의해 외기온도가 소정온도 이하이고 압축기 및 팬이 오프상태일 경우 과냉방지 제어모드를 수행하되, 냉장실 증발기 온도가 미리 설정된 고내 기준온도보다 낮을 경우에 제상히터를 온시킴으로써 상기한 냉장실 증발기 온도를 미리 설정된 고내 기준온도보다 높인 상태에서 냉장실 팬을 온시켜 키도록 하는 제 3과정으로 구성된다.A feature of the method for preventing the overcooling of the refrigerator according to the present invention for achieving the above object is a method for detecting the internal temperature, the outside temperature and the evaporator temperature of the refrigerator, and accordingly to prevent the overcooling in the refrigerator by turning on / off the fan. A first step of starting the operation of the refrigerator by a key input; A second process of performing a steady state control mode when the outside air temperature during the operation of the refrigerator according to the first process is not lower than a predetermined temperature and the compressor and the fan are not turned off; And performing the subcooling control mode when the outside air temperature is lower than the predetermined temperature and the compressor and the fan are turned off by the second process, and the defrost heater is turned on when the refrigerating compartment evaporator temperature is lower than the preset internal reference temperature. And a third process of turning on the refrigerator compartment fan in a state in which the refrigerator compartment evaporator temperature is higher than a preset internal reference temperature.

또한, 상기 과냉방지 제어모드는, 냉장실 증발기 온도가 미리 설정된 고내의 기준온도 보다 낮지 않을 경우 냉장실 팬을 온시키고, 냉장실 증발기 온도가 미리 설정된 고내의 기준온도 보다 낮을 경우 제상히터를 온시키는 제 1단계; 및 상기 제 1단계에 의하여 제상히터가 온된 후 상기한 냉장실 증발기 온도가 미리 설정된 고내 기준온도보다 높아졌을 경우 제상히터를 오프시킴과 아울러 냉장실 팬을 온시키는 제 2단계로 구성됨이 바람직하다.The supercooling control mode may include a first step of turning on the refrigerator compartment fan when the refrigerator compartment evaporator temperature is not lower than the preset reference temperature in the refrigerator and turning on the defrost heater when the refrigerator compartment evaporator temperature is lower than the preset reference temperature in the refrigerator. ; And a second step of turning off the defrost heater and turning on the refrigerating chamber fan when the refrigerating chamber evaporator temperature becomes higher than a preset internal temperature after the defrost heater is turned on by the first step.

이하, 본 발명에 따른 냉장고의 과냉 방지방법의 바람직한 실시예를 첨부된 도면을 참조하여 상세하게 설명하되, 종래와 동일한 구성요소는 동일 부호로서 설명한다.Hereinafter, with reference to the accompanying drawings a preferred embodiment of the method for preventing the overcooling of the refrigerator according to the present invention will be described in detail, the same components as in the prior art will be described with the same reference numerals.

도 3은 본 발명에 따른 냉장고의 과냉 방지방법의 바람직한 실시예를 나타낸 제어 흐름도로서, 도시된 바와 같이, 먼저 사용자의 키 입력에 의해 냉장고의 운전이 개시되는 제 1과정이 수행된다(S201∼S202).3 is a control flowchart illustrating a preferred embodiment of a method for preventing overcooling of a refrigerator according to the present invention. As shown in FIG. 3, a first process of starting operation of a refrigerator by a user's key input is first performed (S201 to S202). ).

여기서, 상기한 냉장고의 운전은 도 1에 도시된 바와 같이, 냉장실(1) 및 냉동실(13)에 각기 마련된 증발기(11)(14)는 압축기(17)가 작동될 때 그 내부에 순환되는 냉매의 열교환작용으로 주변 공기를 냉각시키고, 팬(15)(16)은 상기한 증발기(11)(14) 주위에서 냉각된 공기를 냉동실(13) 및 냉장실(1)로 강제 토출시킨다. 따라서, 고내의 온도 변화에 따라 상기한 압축기(17)와 팬(15)(16)의 작동을 제어함으로써 고내를 적정한 온도로 유지하면서 냉장고를 운전하게 된다.Here, the operation of the refrigerator as shown in FIG. 1, the evaporators 11 and 14 provided in the refrigerating chamber 1 and the freezing chamber 13, respectively, are refrigerant circulated therein when the compressor 17 is operated. The ambient air is cooled by the heat exchange action of the fan, and the fans 15 and 16 force discharge the air cooled around the evaporators 11 and 14 to the freezing chamber 13 and the refrigerating chamber 1. Therefore, the refrigerator is operated while maintaining the inside of the refrigerator at an appropriate temperature by controlling the operations of the compressor 17 and the fans 15 and 16 according to the temperature change in the refrigerator.

이후, 상기 제 1과정에 의한 냉장고 운전중 외기온도를 검출하여 이 외기온도가 소정온도, 예로서 17℃ 이하가 아니고, 아울러 압축기(17) 및 냉장실(1)의 팬(16)이 오프상태가 아닐 경우 정상상태 제어모드를 수행하는 제 2과정이 수행된다(S203∼S206).Thereafter, the outside air temperature is detected during operation of the refrigerator according to the first process so that the outside air temperature is not a predetermined temperature, for example, 17 ° C. or less, and the fan 16 of the compressor 17 and the refrigerating chamber 1 is turned off. If not, the second process of performing the steady state control mode is performed (S203 to S206).

이 제 2과정의 정상상태 제어모드는, 특히 냉장실(1)에 있어서, 전술한 바와 같이 냉장실(1)의 팬(16)을 온시켜 증발기(11) 주위에 발생된 냉기를 냉장실(1)로 강제 토출시킴으로써 고내의 온도를 강하시키고, 온도센서(19)를 통하여 이 냉장실(1) 고내의 온도가 사용자에 의해 설정된 기준온도, 예로서 3℃ 이하로 낮아질 경우 냉장실(1)의 팬(16)을 오프시켜 고내온도를 더 이상 낮아지지 않도록 한다. 따라서, 이와 같이 고내온도에 따라 냉장실 팬(16)을 온 또는 오프시킴으로써 상기한 냉장실(1)이 적정온도로 유지되도록 하는 것이다.In the steady state control mode of this second process, particularly in the refrigerating chamber 1, as described above, the fan 16 of the refrigerating chamber 1 is turned on to cool air generated around the evaporator 11 to the refrigerating chamber 1. Forced discharge lowers the temperature in the refrigerator, and when the temperature in the refrigerator 1 is lowered to a reference temperature set by the user, for example, 3 ° C. or lower through the temperature sensor 19, the fan 16 of the refrigerator compartment 1 Turn off the high temperature so that it does not lower anymore. Therefore, the refrigerating compartment 1 is maintained at an appropriate temperature by turning on or off the refrigerating compartment fan 16 according to the high internal temperature.

여기서, 고내온도, 외기온도 및 증발기온도를 각각 검출하도록 도 2에 도시된 바와 같은 각각의 온도센서(18)(19) 외에 냉장고 외부에서 외기온도를 검출하는 온도센서 및 증발기의 온도를 검출하는 온도센서들이 별도로 마련됨이 바람직하다.Here, in addition to the respective temperature sensors 18 and 19 as shown in FIG. 2 so as to detect the high internal temperature, the outside air temperature and the evaporator temperature, the temperature for detecting the temperature of the temperature sensor and the evaporator for detecting the outside air temperature outside the refrigerator. Preferably, the sensors are provided separately.

이러한 상태하에서 외기온도가 소정온도(17℃) 이하로 낮아 질 경우에는 상기한 바와 같이 냉장실(1)에 마련된 팬(16)이 오프되었더라도 냉장실(1)의 온도가 기준온도(3℃) 이하로 계속 하강하여 과냉이 발생될 우려가 있다.Under such a condition, when the outside air temperature is lowered below the predetermined temperature (17 ° C), even if the fan 16 provided in the refrigerating chamber 1 is turned off as described above, the temperature of the refrigerating chamber 1 is lower than the reference temperature (3 ° C). There is a fear that subcooling occurs continuously.

따라서, 본 발명은 상기 제 2과정에 의해 외기온도가 소정온도(17℃) 이하이고 동시에 압축기(17) 및 팬(16)이 오프상태 일 경우 과냉방지 제어모드를 수행하되, 냉장실(1)의 증발기(11) 온도가 미리 설정된 고내 기준온도(3℃)보다 낮을 경우에 제상히터(21)를 온시킴으로써 상기한 증발기(11) 온도를 미리 설정된 고내 기준온도(3℃)보다 높인 상태에서 냉장실(1)의 팬(16)을 온시켜 키도록 하는 제 3과정을 수행함으로써 냉장실의 과냉을 방지한다(S207∼S211).Therefore, in the present invention, when the outside air temperature is lower than the predetermined temperature (17 ° C) by the second process and at the same time the compressor 17 and the fan 16 are in the off state, the supercooling prevention control mode is performed. When the evaporator 11 temperature is lower than the preset internal reference temperature (3 ° C.), the defrost heater 21 is turned on to raise the evaporator 11 temperature above the preset internal reference temperature (3 ° C.). By performing the third process of turning on the fan 16 of 1), the overcooling of the refrigerating compartment is prevented (S207 to S211).

이를 보다 상세히 설명하면, 상기 과냉방지 제어모드는 먼저 냉장실(1)의 증발기(11) 온도가 미리 설정된 고내의 기준온도(3℃) 보다 낮지 않을 경우 냉장실 팬(16)을 온시킨다. 이후, 냉장실(1)의 증발기(11) 온도가 미리 설정된 고내의 기준온도(3℃) 보다 낮을 경우 제상히터(21)를 온시키는 제 1단계를 수행함으로써 증발기(11)의 온도를 높인다(S207∼S208).In more detail, the subcooling control mode first turns on the refrigerating compartment fan 16 when the evaporator 11 temperature of the refrigerating compartment 1 is not lower than a preset reference temperature (3 ° C.). Thereafter, when the temperature of the evaporator 11 of the refrigerating chamber 1 is lower than a preset reference temperature (3 ° C.), the temperature of the evaporator 11 is increased by performing a first step of turning on the defrost heater 21 (S207). S208).

한편, 상기 제 1단계에 의하여 제상히터(21)가 온된 후 상기한 냉장실 증발기(11) 온도가 미리 설정된 고내 기준온도(3℃)보다 높아졌을 경우 상기한 제상히터(21)를 오프시킴과 아울러 냉장실 팬(16)을 온시키는 제 2단계를 수행함으로써 고내온도 상승에 따라 과냉이 방지되는 것이다(S209∼S211).On the other hand, after the defrost heater 21 is turned on by the first step, when the refrigerating chamber evaporator 11 temperature is higher than the preset internal reference temperature (3 ° C.), the defrost heater 21 is turned off and By performing the second step of turning on the refrigerating compartment fan 16, overcooling is prevented as the internal temperature rises (S209 to S211).

이상에 설명한 바와 같이 본 발명에 따른 냉장고의 과냉 방지방법에 의하면, 냉장실의 온도가 설정온도 이하로 되어 냉장실 팬이 오프된 상태하에서, 외부온도가 소정온도 이하로 낮아질 경우에도 제상히터를 이용하여 냉장실이 과냉되는 것을 방지하게 되는 효과가 있다.As described above, according to the method for preventing overcooling of the refrigerator according to the present invention, even when the temperature of the refrigerating compartment is lower than the set temperature and the refrigerating compartment fan is turned off, the refrigerating compartment is used by using the defrost heater even when the external temperature is lowered below the predetermined temperature. There is an effect of preventing the supercooling.

본 발명은 상술한 특정의 바람직한 실시예에 한정되지 아니하며, 청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 기술 분야에서 통상의 지식을 가진자라면 누구든지 다양한 변형 실시가 가능한 것은 물론이고, 그와 같은 변경은 기재된 특허청구범위 내에 있게 된다.The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such modifications are intended to fall within the scope of the appended claims.

Claims (2)

냉장고의 고내온도, 외기온도 및 증발기온도를 검출하고, 이에 따라 팬을 온/오프시킴으로써 고내의 과냉을 방지하도록 하는 방법에 있어서,In the method of detecting the internal temperature, the outside temperature and the evaporator temperature of the refrigerator, and thereby turning on / off the fan to prevent overcooling in the refrigerator, 키 입력에 의해 냉장고의 운전이 개시되는 제 1과정;A first step of starting operation of the refrigerator by a key input; 상기 제 1과정에 의한 냉장고 운전중 외기온도가 소정온도 이하가 아니고 압축기 및 팬이 오프상태가 아닐 경우 정상상태 제어모드를 수행하는 제 2과정; 및A second process of performing a steady state control mode when the outside air temperature during the operation of the refrigerator according to the first process is not lower than a predetermined temperature and the compressor and the fan are not turned off; And 상기 제 2과정에 의해 외기온도가 소정온도 이하이고 압축기 및 팬이 오프상태일 경우 과냉방지 제어모드를 수행하되, 냉장실 증발기 온도가 미리 설정된 고내 기준온도보다 낮을 경우에 제상히터를 온시킴으로써 상기한 냉장실 증발기 온도를 미리 설정된 고내 기준온도보다 높인 상태에서 냉장실 팬을 온시켜 키도록 하는 제 3과정으로 구성됨을 특징으로 하는 냉장고의 과냉 방지방법.If the outside air temperature is less than the predetermined temperature by the second process and the compressor and the fan are off, the anti-cooling control mode is performed. When the refrigerator compartment evaporator temperature is lower than the preset internal reference temperature, the defrost heater is turned on. And a third process of turning on the refrigerator compartment fan in a state in which the evaporator temperature is higher than a preset internal reference temperature. 제 1항에 있어서, 상기 과냉방지 제어모드는,The method of claim 1, wherein the anti-cooling control mode, 냉장실 증발기 온도가 미리 설정된 고내의 기준온도 보다 낮지 않을 경우 냉장실 팬을 온시키고, 냉장실 증발기 온도가 미리 설정된 고내의 기준온도 보다 낮을 경우 제상히터를 온시키는 제 1단계; 및A first step of turning on the refrigerator compartment fan when the refrigerator compartment evaporator temperature is not lower than the preset reference temperature in the refrigerator and turning on the defrost heater when the refrigerator compartment evaporator temperature is lower than the preset reference temperature in the refrigerator; And 상기 제 1단계에 의하여 제상히터가 온된 후 상기한 냉장실 증발기 온도가 미리 설정된 고내 기준온도보다 높아졌을 경우 제상히터를 오프시킴과 아울러 냉장실 팬을 온시키는 제 2단계로 구성됨을 특징으로 하는 냉장고의 과냉 방지방법.After the defrost heater is turned on by the first step, when the refrigerating chamber evaporator temperature is higher than a preset internal reference temperature, the defrost heater is turned off and a second step of turning on the refrigerating fan is provided. Prevention method.
KR1019970056350A 1997-10-30 1997-10-30 Method for preventing over-freezing of a refrigerator KR100219430B1 (en)

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