KR100239534B1 - Anti-freezing device - Google Patents

Anti-freezing device Download PDF

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Publication number
KR100239534B1
KR100239534B1 KR1019970036730A KR19970036730A KR100239534B1 KR 100239534 B1 KR100239534 B1 KR 100239534B1 KR 1019970036730 A KR1019970036730 A KR 1019970036730A KR 19970036730 A KR19970036730 A KR 19970036730A KR 100239534 B1 KR100239534 B1 KR 100239534B1
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South Korea
Prior art keywords
cabinet
temperature
heater
driving
refrigerator
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KR1019970036730A
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Korean (ko)
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KR19990013139A (en
Inventor
오길수
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윤종용
삼성전자주식회사
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Priority to KR1019970036730A priority Critical patent/KR100239534B1/en
Publication of KR19990013139A publication Critical patent/KR19990013139A/en
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Publication of KR100239534B1 publication Critical patent/KR100239534B1/en

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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
    • 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
    • F25D23/00—General constructional features
    • F25D23/08—Parts formed wholly or mainly of plastics materials
    • F25D23/082—Strips
    • F25D23/087—Sealing strips
    • 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
    • F25D2201/00—Insulation
    • F25D2201/10—Insulation with respect to heat
    • F25D2201/12—Insulation with respect to heat using an insulating packing material
    • 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
    • F25D2600/02—Timing
    • 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
    • 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
    • F25D2700/16—Sensors measuring the temperature of products

Abstract

본 발명은 냉장고의 이슬맺힘 방지장치에 관한 것으로, 단열재로 제작된 캐비넷과, 상기 캐비넷의 전면에 개폐가능하도록 설치된 도어와, 상기 캐비넷 및 도어의 사이에 냉기누설을 방지하도록 설치된 가스켓을 구비하는 냉장고에 있어서, 상기 냉장고가 설치된 외기온도를 감지하는 외기온도감지수단과, 상기 캐비넷의 표면온도를 감지하는 표면온도감지수단과, 상기 외기온도감지수단에 의해 감지된 외기온도 및 상기 표면온도감지수단에 의해 감지된 표면온도에 따라 캐비넷표면의 노점온도를 산출하여 히터의 구동개시시간과 구동시간을 제어하는 제어수단과, 상기 제어수단의 제어에 따라 히터를 구동하는 히터구동수단으로 이루어져, 외기온도와 캐비넷의 이슬맺힘부 온도를 감지하여 캐비넷표면의 노점온도를 산출한다음 일정시간동안 히터를 구동하므로 냉각성능을 저하시키지 않으면서도 최적치의 온도로 이슬맺힘을 제거하여 소비전력을 절감한다.The present invention relates to a device for preventing dew condensation of a refrigerator, the refrigerator including a cabinet made of a heat insulating material, a door provided to be opened and closed on the front surface of the cabinet, and a gasket provided to prevent cold air leakage between the cabinet and the door. In the air, the outside air temperature sensing means for sensing the outside air temperature is installed, the surface temperature sensing means for sensing the surface temperature of the cabinet, the outside air temperature and the surface temperature sensing means detected by the outside temperature sensing means Control means for controlling the starting time and driving time of the heater by calculating the dew point temperature of the cabinet surface in accordance with the detected surface temperature, and the heater driving means for driving the heater in accordance with the control of the control means, the outside temperature and the cabinet The dew point temperature of the cabinet is detected and the dew point temperature of the cabinet surface is calculated. Driving it, thus saving power consumption by removing the condensation at a temperature in the optimum value even without degrading the cooling performance.

Description

냉장고의 이슬맺힘 방지장치Dew device of refrigerator

본 발명은 냉장고에 관한 것으로, 특히 가스켓표면과 캐비넷표면에 외기온도와 내부의 온도차로 인하여 발생하는 이슬맺힘을 방지하는 냉장고의 이슬맺힘 방지장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator, and more particularly, to an apparatus for preventing dew condensation of a refrigerator which prevents dew condensation caused by a difference between an outside temperature and an internal temperature on a gasket surface and a cabinet surface.

일반적으로, 냉장고는 도1에 도시한 바와같이, 냉매싸이클에 의해 생성된 냉기를 고내에 공급하여 식품을 신선하게 저장하는 것으로, 비교적 단기간 저장가능한 식품을 얼지 않도록 보관하는 냉장실(3)과, 식품을 냉동시켜 냉장실(3)에 비해 매우 장기간 저장하는 냉동실(1)로 구분된다.In general, as shown in FIG. 1, the refrigerator supplies cold air generated by the refrigerant cycle to the inside of the refrigerator to store the food freshly, and the refrigerator compartment 3 which stores the food which can be stored for a relatively short time so as not to freeze, and the food It is divided into a freezer compartment (1) that stores the frozen for a very long time compared to the refrigerating compartment (3).

상기한 냉장고의 외부는 도2에 도시한 바와같이, 발포 스티로품 등과 같은 단열재로 제작된 캐비넷(5)과, 상기 캐비넷(5)의 전면에 개폐가능하도록 설치된 냉장실 및 냉동실도어(7, 9; 이하, 도어라 한다)와, 상기 캐비넷(5) 및 도어(7, 9)의 사이에 냉기누설을 방지하도록 설치된 가스켓(11)으로 구성되어 있다.As shown in FIG. 2, the outside of the refrigerator includes a cabinet 5 made of a heat insulating material such as foamed styro product, and a refrigerating chamber and a freezer door 7 and 9 installed to be opened and closed on the front surface of the cabinet 5. And a gasket 11 provided between the cabinet 5 and the doors 7 and 9 to prevent leakage of cold air.

상기와 같이 구성된 냉장고에 있어서, 냉매싸이클에 의해 냉장실(3) 및 냉동실(1)의 고내온도가 식품을 저장하기에 적절한 적정온도로 유지되면, 외기온도(실내온도)와 고내온도의 차로 인하여 가스켓(11)표면과 캐비넷(5)표면에는 이슬맺힘이 발생하는데, 종래에는 이를 방지하기 위하여 냉매싸이클의 일체화된 파이프를 설치하여 이슬맺힘부의 온도를 상승시켜 이슬맺힘을 방지하도록 하였다.In the refrigerator configured as described above, if the internal temperature of the refrigerating compartment 3 and the freezing compartment 1 is maintained at an appropriate temperature suitable for storing food by the refrigerant cycle, the gasket is caused by the difference between the outside air temperature (indoor temperature) and the high internal temperature. (11) Dew condensation occurs on the surface and the cabinet (5). In order to prevent this, conventionally, an integrated pipe of a refrigerant cycle was installed to prevent dew condensation by raising the temperature of the dew condensation part.

그런데, 이와같은 종래 냉장고의 이슬맺힘 제거방식에 있어서는, 가스켓(11)표면과 캐비넷(5)표면의 온도가 과다하게 상승되어 냉각성능이 저하됨은 물론, 뜨거움으로 사용자의 불만이 고조되었고, 별도의 파이프설치 등으로 제조원가가 상승하였으며, 외기의 조건변화에 능동적으로 대응하지 못한다(외기온도 상승시 표면온도상승, 외기온도 저하시 표면온도저하)는 문제점이 있었다.However, in the dew removal method of the conventional refrigerator, the temperature of the surface of the gasket 11 and the cabinet 5 is excessively increased to lower the cooling performance, as well as to increase the user's dissatisfaction due to the heat. The cost of manufacturing increased due to the installation of pipes, and there was a problem in that it could not actively respond to the change in the condition of the outside air (surface temperature rises when the outside temperature rises, and the surface temperature decreases when the outside air temperature decreases).

따라서, 본 발명은 상기와 같은 문제점을 해결하기위해 안출된 것으로, 외기온도와 캐비넷의 이슬맺힘부 온도를 감지하여 캐비넷표면의 노점온도를 산출한다음 일정시간동안 히터를 구동하므로 냉각성능을 저하시키지 않으면서도 최적치의 온도로 이슬맺힘을 제거하여 소비전력을 절감하는 냉장고의 이슬맺힘 방지장치를 제공하는데 그 목적이 있다.Therefore, the present invention has been made to solve the above problems, and calculates the dew point temperature of the cabinet surface by detecting the outside temperature and the dew temperature of the cabinet, and the heater is driven for a predetermined time so that the cooling performance is not reduced. It is also an object of the present invention to provide a device for preventing dew condensation of a refrigerator, which reduces power consumption by removing dew condensation at an optimum temperature.

상기 목적을 달성하기 위하여 본 발명에 의한 냉장고의 이슬맺힘 방지장치는 단열재로 제작된 캐비넷과, 상기 캐비넷의 전면에 개폐가능하도록 설치된 도어와, 상기 캐비넷 및 도어의 사이에 냉기누설을 방지하도록 설치된 가스켓을 구비하는 냉장고에 있어서, 상기 냉장고가 설치된 외기온도를 감지하는 외기온도감지수단과, 상기 캐비넷의 표면온도를 감지하는 표면온도감지수단과, 상기 외기온도감지수단에 의해 감지된 외기온도 및 상기 표면온도감지수단에 의해 감지된 표면온도에 따라 캐비넷표면의 노점온도를 산출하여 히터의 구동 개시시간과 구동시간을 제어하는 제어수단과, 상기 제어수단의 제어에 따라 히터를 구동하는 히터구동수단으로 이루어진 것을 특징으로 한다.In order to achieve the above object, the dew condensation preventing device of the refrigerator according to the present invention includes a cabinet made of a heat insulating material, a door installed to be opened and closed at the front of the cabinet, and a gasket installed to prevent cold air leakage between the cabinet and the door. A refrigerator comprising: an outside air temperature sensing means for sensing an outside air temperature in which the refrigerator is installed, a surface temperature sensing means for sensing a surface temperature of the cabinet, and an outside air temperature and the surface sensed by the outside temperature sensing means Control means for controlling the starting time and driving time of the heater by calculating the dew point temperature of the cabinet surface according to the surface temperature detected by the temperature sensing means, and the heater driving means for driving the heater according to the control of the control means. It is characterized by.

제1도는 종래의 냉장고를 개략적으로 도시한 전면사시도.1 is a front perspective view schematically showing a conventional refrigerator.

제2도는 종래 냉장고의 도어구조를 도시한 확대단면도.Figure 2 is an enlarged cross-sectional view showing a door structure of a conventional refrigerator.

제3도는 본 발명에 의한 냉장고의 개략단면도.3 is a schematic cross-sectional view of a refrigerator according to the present invention.

제4도는 본 발명의 일실시예에 의한 냉장고의 이슬맺힘 방지장치의 제어블록도.4 is a control block diagram of a dew condensation preventing device of a refrigerator according to one embodiment of the present invention.

제5도는 본 발명에 적용되는 주요구성부분의 상세회로도.5 is a detailed circuit diagram of major components applied to the present invention.

〈도면의 주요부분에 대한 부호의 설명〉<Explanation of symbols for main parts of drawing>

5 : 캐비넷 7, 9 : 도어5: cabinet 7, 9: door

11 : 가스켓 13, 15, 17, 19 : 히터11: gasket 13, 15, 17, 19: heater

25 : 외기온도감지수단 30 : 표면온도감지수단25: outside temperature sensing means 30: surface temperature sensing means

35 : 제어수단 40 : 히터구동수단35: control means 40: heater driving means

이하, 본 발명의 일실시예를 첨부된 도면을 참조하여 상세히 설명한다.Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

도3은 본 발명에 의한 냉장고의 개략단면도로서, 종래의 구성과 동일한 부분에 대해서는 동일부호 및 동일명칭을 명기하여 중복되는 설명을 생략한다.3 is a schematic cross-sectional view of a refrigerator according to the present invention, and the same reference numerals and the same names are used to designate the same parts as in the conventional construction, and overlapping descriptions are omitted.

도3에 도시한 바와같이, 캐비넷(5)의 가스켓접촉면에는 외기온도와 고내온도의 차로 인하여 발생하는 이슬맺힘을 제거하는 히터(13, 15, 17, 19)가 설치되어 있고, 상기 캐비넷(5)의 표면중 이슬맺힘이 제일 취약한 상부캐비넷(5)의 소정위치에는 캐비넷(5)의 이슬맺힘부 표면온도를 감지하는 서미스터(30)가 설치되어 있다.As shown in Fig. 3, the gasket contact surface of the cabinet 5 is provided with heaters 13, 15, 17, and 19 for removing dew condensation caused by the difference between the outside air temperature and the internal temperature of the cabinet 5, and the cabinet 5 The thermistor 30 which detects the surface temperature of the dew condensation part of the cabinet 5 is installed in the predetermined position of the upper cabinet 5 where the dew condensation is weakest among the surfaces of the.

도4에 도시한 바와같이, 전원수단(20)은 도시되지 않은 교류전원단으로부터 공급되는 상용교류전압을 입력받아 냉장고의 동작에 필요한 소정의 직류전압(부하구동전원, 마이컴 구동전원)으로 변환하여 각 구동회로에 출력하고, 외기온도감지수단(25)은 상기 냉장고가 설치된 외기온도를 감지하는 서미스터이며, 표면온도감지수단(30)은 상기 캐비넷(5)의 이슬맺힘부 표면온도를 감지하는 서미스터이다.As shown in Fig. 4, the power supply means 20 receives a commercial AC voltage supplied from an AC power supply terminal (not shown) and converts it into predetermined DC voltages (load driving power supply and microcomputer driving power supply) required for the operation of the refrigerator. Output to the drive circuit, the outside temperature sensing means 25 is a thermistor for sensing the outside air temperature is installed the refrigerator, the surface temperature sensing means 30 is a thermistor for detecting the surface temperature of the dew portion of the cabinet (5) .

제어수단(35)은 상기 전원수단(20)으로부터 출력되는 직류전압(마이컴 구동전원)을 인가받아 상기 냉장고를 초기화시키는 마이크로컴퓨터로써, 이 제어수단(35)은 상기 외기온도감지수단(25)에 의해 감지된 외기온도 및 상기 표면온도감지수단(30)에 의해 감지된 표면온도에 따라 캐비넷(5)표면의 노점온도를 산출하여 히터(13, 15, 17, 19)의 구동개시시간과 구동시간을 제어한다.The control means 35 is a microcomputer for initializing the refrigerator by receiving a direct current voltage (microcomputer driving power source) output from the power supply means 20. The control means 35 is connected to the outside air temperature sensing means 25. Drive start time and drive time of the heaters 13, 15, 17, and 19 are calculated by calculating the dew point temperature of the surface of the cabinet 5 according to the outside air temperature detected by the surface temperature and the surface temperature detected by the surface temperature sensing means 30. To control.

히터구동수단(40)은 상기 제어수단(35)으로부터 출력되는 제어신호를 입력받아 히터(13, 15, 17, 19)를 온/오프 구동제어하는 것으로, 이 히터구동수단(40)은 상기 제어수단(35)의 출력단자(O1)로부터 출력되는 제어신호를 저항(R1)을 통해 입력받아 턴온/턴오프동작하는 트랜지스터(TR1)와, 상기 트랜지스터(TR1)의 턴온/턴오프동작에 따라 상기 히터(13, 15, 17, 19)에 전원을 공급하도록 전원수단(20)으로부터 출력되는 직류전압(VDD)을 저항(R2)을 통해 인가받아 온/오프구동하는 히터릴레이(RY1)로 구성되어 있다.The heater driving means 40 receives the control signal output from the control means 35 and controls the heaters 13, 15, 17, and 19 on / off driving, and the heater driving means 40 controls the control. A transistor TR1 that receives a control signal output from the output terminal O1 of the means 35 through a resistor R1 and is turned on / off and operated according to the turn-on / turn-off operation of the transistor TR1. It is composed of a heater relay RY1 that is supplied with a direct current voltage V DD output from the power supply means 20 through a resistor R2 to supply power to the heaters 13, 15, 17, and 19. It is.

이하, 상기와 같이 구성된 냉장고의 이슬맺힘 방지장치의 작용효과를 설명한다.Hereinafter, the effect of the dew condensation preventing device of the refrigerator configured as described above will be described.

먼저, 초기 또는 정전으로 인한 전원 오프이후의 전원 온동작으로 냉장고에 전원이 인가되면, 전원수단(20)에서는 교류전원단으로부터 공급되는 상용교류전압을 입력받아 냉장고의 동작에 필요한 소정의 직류전압(부하구동전원, 마이컴 구동전원)으로 변환하여 각 구동회로 및 제어수단(35)에 출력한다.First, when power is applied to the refrigerator by the power-on operation after the power is turned off due to an initial or power failure, the power supply unit 20 receives a commercial AC voltage supplied from an AC power supply terminal, and then selects a predetermined DC voltage (load) required for the operation of the refrigerator. Drive power and microcomputer drive power) to be output to each drive circuit and control means 35.

따라서, 상기 제어수단(35)에서는 전원수단(20)으로부터 출력되는 직류전압(마이컴 구동전압)을 입력받아 냉장고를 초기화시킨다.Accordingly, the control unit 35 receives a DC voltage (microcomputer driving voltage) output from the power supply unit 20 and initializes the refrigerator.

그리고, 사용자가 냉동실(1)과 냉장실(3)의 도시되지 않은 소정위치에 장착된 온도조절부를 조작하여 원하는 고내온도를 설정하면, 압축기(도시안됨)의 구동에 따른 냉매싸이클에 의해 고내온도가 설정온도로 유지된다.Then, when the user operates the temperature control unit mounted at a predetermined position of the freezer compartment 1 and the refrigerating compartment 3 to set the desired internal temperature, the internal temperature is increased by the refrigerant cycle according to the operation of the compressor (not shown). It is maintained at the set temperature.

이때, 냉장고가 설치된 외기온도를 외기온도감지수단(25)에서 감지하여 제어수단(35)에 출력하고, 캐비넷(5)의 표면중 이슬맺힘이 제일 취약한 부위인 상부캐비넷(5)의 이슬맺힘부 표면온도를 표면온도감지수단(30)에서 감지하여 제어수단(35)에 출력한다.At this time, the outside air temperature installed in the refrigerator is detected by the outside air temperature detecting means 25 and output to the control means 35, the dew forming part of the upper cabinet (5) which is the most fragile dew on the surface of the cabinet (5) The surface temperature is detected by the surface temperature sensing means 30 and output to the control means 35.

이에 따라, 상기 제어수단(35)에서는 외기온도감지수단(25)에 의해 감지된 외기온도 및 표면온도감지수단(30)에 의해 감지된 표면온도에 따라 캐비넷(5) 표면의 노점온도를 산출하고, 그 산출된 노점온도에 따라 히터(13, 15, 17, 19)의 구동개시시간과 구동시간을 결정한다.Accordingly, the control means 35 calculates the dew point temperature of the surface of the cabinet 5 according to the outside air temperature detected by the outside air temperature detecting means 25 and the surface temperature detected by the surface temperature detecting means 30. The driving start time and the driving time of the heaters 13, 15, 17 and 19 are determined according to the calculated dew point temperature.

상기 제어수단(35)에서 산출된 노점온도에 따라 히터(13, 15, 17, 19)의 구동개시시간이면, 제어수단(35)에서는 히터(13, 15, 17, 19)를 구동하기위한 하이레벨의 제어신호를 출력단자(O1)를 통해 히터구동수단(40)에 출력한다.When the driving start time of the heaters 13, 15, 17, 19 is calculated according to the dew point temperature calculated by the control means 35, the control means 35 has a high for driving the heaters 13, 15, 17, 19. The control signal of the level is output to the heater driving means 40 through the output terminal O1.

따라서, 상기 제어수단(35)의 출력단자(O1)로부터 출력되는 하이레벨의 제어신호는 저항(R1)을 통해 트랜지스터(TR1)의 베이스단자에 인가되어 트랜지스터(TR1)가 턴온된다.Accordingly, the high level control signal output from the output terminal O1 of the control means 35 is applied to the base terminal of the transistor TR1 through the resistor R1, so that the transistor TR1 is turned on.

상기 트랜지스터(TR1)가 턴온되면, 전원수단(20)으로부터 출력되는 직류전압(VDD)에 의해 전류가 저항(R2) 및 히터릴레이(RY1)를 거쳐 트랜지스터(TR1)를 통해 접지단으로 흐르기 때문에 상기 히터릴레이(RY1)가 구동하여 히터릴레이(RY1)의 접점(RY1c)이 온되므로 히터(13, 15, 17, 19)에 전원이 인가된다.When the transistor TR1 is turned on, current flows to the ground terminal through the transistor TR1 through the resistor R2 and the heater relay RY1 by the DC voltage V DD output from the power supply means 20. Since the heater relay RY1 is driven and the contact RY1c of the heater relay RY1 is turned on, power is applied to the heaters 13, 15, 17, and 19.

상기 히터(13, 15, 17, 19)에 전원이 인가되면, 히터(13, 15, 17, 19)가 발열하여 가스켓(11) 표면과 캐비넷(5) 표면에 외기온도와 고내온도의 차로 인하여 발생되는 이슬맺힘이 제거된다.When power is applied to the heaters 13, 15, 17, and 19, the heaters 13, 15, 17, and 19 generate heat and are generated due to the difference between the outside air temperature and the internal temperature of the gasket 11 and the cabinet 5. Dew condensation is removed.

이때, 제어수단(35)에서는 산출된 노점온도에 따라 히터(13, 15, 17, 19)의 구동개시시간을 제어함은 물론, 히터(13, 15, 17, 19)의 온/오프구동시간을 제어하여 출력단자(O1)를 통해 하이 또는 로우레벨의 제어신호를 히터구동수단(40)에 출력한다.At this time, the control means 35 controls the start time of the heaters 13, 15, 17, 19 according to the calculated dew point temperature, as well as the on / off drive time of the heaters 13, 15, 17, 19. The control unit outputs a high or low level control signal to the heater driving means 40 through the output terminal O1.

이에 따라, 상기 제어수단(35)의 출력단자(O1)로부터 로우레벨의 제어신호가 출력되면 트랜지스터(TR1)가 턴오프되고, 상기 트랜지스터(TR1)가 턴오프되면 히터릴레이(RY1)에 전류가 유기되지 않게 되어 히터릴레이(RY1)의 접점(RY1c)이 오프되므로 히터(13, 15, 17, 19)에 인가되는 전원이 차단된다.Accordingly, when the low level control signal is output from the output terminal O1 of the control unit 35, the transistor TR1 is turned off. When the transistor TR1 is turned off, a current is applied to the heater relay RY1. Since it is not induced, the contact RY1c of the heater relay RY1 is turned off, so that the power applied to the heaters 13, 15, 17, and 19 is cut off.

상기 히터(13, 15, 17, 19)에 인가되는 전원이 차단되면, 히터(13, 15, 17, 19)의 발열이 정지하여 이슬맺힘 제거동작을 중지한다.When the power applied to the heaters 13, 15, 17, 19 is cut off, the heat generation of the heaters 13, 15, 17, 19 is stopped to stop the dew formation removing operation.

이와같이, 상기 제어수단(35)의 출력단자(O1)로부터 출력되는 하이 또는 로우레벨의 제어신호에 따라 히터릴레이(RY1)를 온/오프시킴으로 히터(13, 15, 17, 19)에 인가되는 전원을 제어하여 일정시간동안 히터(13, 15, 17, 19)를 구동하므로 냉각성능을 저하시키지 않으면서도 최적치의 온도로 이슬맺힘을 제거하여 소비전력을 절감할 수 있다.In this way, the power applied to the heaters 13, 15, 17, 19 by turning on / off the heater relay RY1 according to the high or low level control signal output from the output terminal O1 of the control means 35. Since the heater 13, 15, 17, 19 for a predetermined time to control the dew condensation at the optimum temperature without reducing the cooling performance can be reduced to reduce the power consumption.

상기의 설명에서와 같이 본 발명에 의한 냉장고의 이슬맺힘 방지장치에 의하면, 외기온도와 캐비넷의 이슬맺힘부 온도를 감지하여 캐비넷표면의 노점온도를 산출한다음 일정시간동안 히터를 구동하므로 냉각성능을 저하시키지 않으면서도 최적치의 온도로 이슬맺힘을 제거하여 소비전력을 절감한다는 효과가 있다.As described above, according to the apparatus for preventing dew condensation of the refrigerator according to the present invention, the dew point temperature of the cabinet surface is calculated by detecting the outside air temperature and the dew point temperature of the cabinet, and then the heater is driven for a predetermined time, thereby reducing the cooling performance. It can reduce the power consumption by eliminating dew condensation at the optimum temperature without making it happen.

Claims (3)

단열재로 제작된 캐비넷과, 상기 캐비넷의 전면에 개폐가능하도록 설치된 도어와, 상기 캐비넷 및 도어의 사이에 냉기누설을 방지하도록 설치된 가스켓을 구비하는 냉장고에 있어서, 상기 냉장고가 설치된 외기온도를 감지하는 외기온도감지수단과, 상기 캐비넷의 표면온도를 감지하는 표면온도감지수단과, 상기 외기온도감지수단에 의해 감지된 외기온도 및 상기 표면온도감지수단에 의해 감지된 표면온도에 따라 캐비넷표면의 노점온도를 산출하여 히터의 구동개시시긴과 구동시간을 제어하는 제어수단과, 상기 제어수단의 제어에 따라 히터를 구동하는 히터구동수단으로 이루어진 것을 특징으로 하는 냉장고의 이슬맺힘 방지장치.A refrigerator having a cabinet made of heat insulating material, a door provided to be opened and closed on a front surface of the cabinet, and a gasket installed to prevent cold air leakage between the cabinet and the door, wherein the outside air temperature senses an outside air temperature at which the refrigerator is installed The dew point temperature of the cabinet surface is determined according to a picture sensing means, a surface temperature sensing means for sensing the surface temperature of the cabinet, an outside air temperature sensed by the outside temperature sensing means, and a surface temperature detected by the surface temperature sensing means. And a control means for controlling the driving start time and the driving time of the heater and a heater driving means for driving the heater according to the control of the control means. 제1항에 있어서, 상기 표면온도감지수단은 상기 캐비넷의 표면중 이슬맺힘이 취약한 부위의 표면온도를 감지하는 서미스터인 것을 특징으로 하는 냉장고의 이슬맺힘 방지장치.The apparatus of claim 1, wherein the surface temperature detecting means is a thermistor which detects a surface temperature of a part where the dew condensation is weak in the surface of the cabinet. 제1항 또는 제2항에 있어서, 상기 히터는 상기 캐비넷의 가스켓접촉면에 설치되어 있는 것을 특징으로 하는 냉장고의 이슬맺힘 방지장치.The apparatus for preventing dew condensation of a refrigerator according to claim 1 or 2, wherein the heater is provided on a gasket contact surface of the cabinet.
KR1019970036730A 1997-07-31 1997-07-31 Anti-freezing device KR100239534B1 (en)

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KR20020057136A (en) * 2000-12-30 2002-07-11 구자홍 Prevention Apparatus for Dewing in Refrigerator

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KR100588845B1 (en) * 2004-09-23 2006-06-14 주식회사 대우일렉트로닉스 A structure for anti-forming dew in the cabinet of a refrigerator
KR100907793B1 (en) * 2007-09-27 2009-07-15 엘지전자 주식회사 Refrigerator

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