KR0158014B1 - Defrosting circuit of a refrigerator - Google Patents

Defrosting circuit of a refrigerator Download PDF

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Publication number
KR0158014B1
KR0158014B1 KR1019940008436A KR19940008436A KR0158014B1 KR 0158014 B1 KR0158014 B1 KR 0158014B1 KR 1019940008436 A KR1019940008436 A KR 1019940008436A KR 19940008436 A KR19940008436 A KR 19940008436A KR 0158014 B1 KR0158014 B1 KR 0158014B1
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South Korea
Prior art keywords
temperature
defrost
heater
htr
cooler
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KR1019940008436A
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Korean (ko)
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KR950029733A (en
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정광호
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배순훈
대우전자주식회사
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Priority to KR1019940008436A priority Critical patent/KR0158014B1/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
    • F25D21/002—Defroster control
    • F25D21/006—Defroster control with electronic control circuits
    • 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
    • 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
    • F25D2700/00—Means for sensing or measuring; Sensors therefor
    • F25D2700/12—Sensors measuring the inside temperature
    • F25D2700/122—Sensors measuring the inside temperature of freezer compartments

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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)
  • Defrosting Systems (AREA)

Abstract

본 발명은 제상시에도 냉동실의 온도가 보상될 수 있도록 한 냉장고의 제상회로에 관한 것으로, 냉각기에 설치된 제상용히터(HTR)를 발열시켜 제상을 행하는 냉장고의 제상회로에 있어서, 발열량이 가변될 수 있도록 제상용히터(HTR)를 구동하는 히터구동수단(20)과; 냉동실의 고내온도를 감지하는 냉동실 온도감지수단(30); 냉각기 주위의 온도를 감지하여 제상완료시점을 검출하는 냉각기 온도감지수단(40); 및 제상시 냉동실의 온도가 일정온도 이상으로 검출되면 상기 히터구동수단(20)으로 제상용히터(HTR)의 발열량이 낮은 단계로 전환되도록 출력한후, 냉각기의 온도가 제상완료온도이거나 제상용히터(HTR) 구동후 일정시간이 경과되면 상기 히터(HTR)의 구동을 중지시켜 제상을 완료하는 제어수단(10)으로 구성된 것을 특징으로 한다.The present invention relates to a defrosting circuit of a refrigerator that allows the temperature of a freezer compartment to be compensated even during defrosting. In the defrosting circuit of a refrigerator that generates defrost by heating a defrost heater (HTR) installed in a cooler, the amount of heat generated may vary. A heater driving means 20 for driving the defrost heater HTR so as to be used; A freezer compartment temperature sensing means (30) for sensing the internal temperature of the freezer compartment; Cooler temperature sensing means for sensing the temperature around the cooler for detecting the completion time of defrosting; And when the temperature of the freezing compartment is detected at a temperature higher than a predetermined temperature, the heater driving means 20 outputs the heat generation amount of the defrost heater HTR to a low level, and the temperature of the cooler is a defrost completion temperature or a defrost heater. After a predetermined time elapses after the driving of the HTR, the control unit 10 stops driving of the heater HTR to complete defrosting.

Description

냉장고의 제상회로Defrost circuit of the refrigerator

제1도는 본 발명에 의한 일실시예.1 is an embodiment according to the present invention.

제2도는 본 발명에 의한 제어 흐름도.2 is a control flowchart according to the present invention.

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

10 : 제어수단 20 : 히터구동수단10: control means 20: heater driving means

30 : 냉동실 온도감지수단 40 : 냉각기 온도감지수단30: freezer compartment temperature detection means 40: cooler temperature detection means

T1, T2 : 온도감지소자 D1 : 다이오드T1, T2: temperature sensing element D1: diode

HTR : 제상용히터HTR: Defrost Heater

본 발명은 냉장고의 제상회로에 관한 것으로, 특히 제상시에도 냉동실의 온도가 보상될 수 있도록 한 냉장고의 제상회로에 관한 것이다.The present invention relates to a defrost circuit of the refrigerator, and more particularly, to a defrost circuit of the refrigerator so that the temperature of the freezer compartment can be compensated even during defrost.

종래에는 압축기가 일정시간(예: 8시간) 운전을 하게되면 냉각기에 설치된 제상용히터를 발열시켜 제상을 수행하는바, 상기 제상용히터의 발열로 그 근접부위에 위치된 냉동실의 온도가 상승(예: 0℃이상)하는 문제점이 발생되었다.Conventionally, when the compressor is operated for a predetermined time (for example, 8 hours), the defrosting heater installed in the cooler is heated to perform defrosting. The heat of the defrosting heater increases the temperature of the freezer compartment located near the defrosting heater. Example: 0 ℃ or higher).

본 발명은 상기한 문제점을 해결하기 위하여 안출한 것으로, 제상시 냉동실의 온도를 보상하여줄 수 있는 냉장고의 제상회로를 제공하는데에 본 발명의 목적이 있다.The present invention has been made to solve the above problems, it is an object of the present invention to provide a defrost circuit of a refrigerator that can compensate the temperature of the freezer compartment during defrosting.

이와같은 목적을 달성하기 위한 본 발명은 발열량이 가변될 수 있도록 제상용히터를 구동하는 히터구동수단과, 냉동실의 고내온도를 감지하는 냉동실 온도감지수단과, 냉각기의 온도를 감지하여 제상완료시점을 검출하는 냉각기의 온도감지수단과, 제상시 냉동실의 온도가 일정온도 이상으로 검출되면 상기 히터구동수단으로 제상용히터의 발열량이 낮은 단계로 전환되도록 출력한후, 냉각기의 온도가 제상완료온도거나 제상용히터 구동후 일정시간이 경과되면 상기 히터의 구동을 중지시켜 제상을 완료하는 제어수단으로 구성된 것이다.In order to achieve the above object, the present invention provides a heater driving means for driving a defrost heater so that the amount of heat can be varied, a freezing chamber temperature sensing means for detecting a temperature inside a freezer compartment, and a temperature of the cooler for defrosting completion time. When the temperature sensing means of the cooler to detect and the temperature of the freezing chamber at the time of defrosting are detected to be above a predetermined temperature, the heater driving means is outputted so that the heat generation amount of the defrost heater is converted to a low stage, and then the temperature of the cooler is defrosted or After a predetermined time has elapsed after driving the commercial heater, the heater is configured to stop driving to complete defrosting.

이하, 본 발명의 일실시예인 첨부된 도면에 의거하여 본 발명을 설명한다.Hereinafter, the present invention will be described with reference to the accompanying drawings which are embodiments of the present invention.

제1도는 본 발명에 의한 일실시예이다.1 is an embodiment according to the present invention.

우선, 부호 10은 제어수단으로, 본 발명에 의한 소정 프로그램이 내장되고 냉장고의 전체동작을 제어하는 원칩 마이컴(ONE CHIP MICOM)이다.First, reference numeral 10 denotes a control means, which is a ONE CHIP MICOM in which a predetermined program according to the present invention is incorporated and controls the overall operation of the refrigerator.

부호 20은 히터구동수단으로, 상기 제어수단(10)의 포트(P1)를 통해 인버터(I1)가 연결되고, 이 인버터(I1)의 출력이 릴레이(RY1)의 코일부에 연결됨과 아울러 상기 제어수단(10)의 포트(P2)를 통해 인버터(I2) 및 릴레이(RY2)의 코일부가 연결된다. 또한, 전원(AC;220V)이 제상용히터(HTR)에 인가되도록 상기 릴레이(RY2)의 스위치가 개폐되고, 전원(AC)이 다이오드(D1)를 통해 제상용히터(HTR)에 인가되도록 상기 릴레이(RY2)가 개폐접속된다.Reference numeral 20 is a heater driving means, the inverter I1 is connected through the port P1 of the control means 10, the output of the inverter I1 is connected to the coil portion of the relay RY1 and the control The coil part of the inverter I2 and the relay RY2 is connected via a port P2 of the means 10. In addition, the switch of the relay RY2 is opened and closed so that the power source AC 220V is applied to the defrost heater HTR, and the power source AC is applied to the defrost heater HTR through the diode D1. The relay RY2 is opened and closed.

부호 30은 냉동실 온도감지수단으로, 써미스터(T1), 저항(R1)(R2), 콘덴서(C1)로 구성되며, 냉동실의 소정부위에 취부된 써미스터(T1)(Negative Temperature Coefficient)가 냉동실의 온도를 감지함에 따라 자체저항이 가변되고, 그에따라 저항(R1)양단의 전압이 가변되어 상기 제어수단(10)의 A/D(아날로그/디지탈변환)포트(P3)에는 가변된 전압이 입력되고, 이 입력전압을 통해 제어수단(10)은 냉동실의 온도를 검출한다.Reference numeral 30 denotes a freezer compartment temperature sensing means, which is composed of thermistor T1, resistors R1, R2, and condenser C1, and a thermistor T1 (Negative Temperature Coefficient) mounted at a predetermined portion of the freezer compartment has a temperature of the freezer compartment. As the self-resistance is changed, and the voltage across the resistor R1 is changed accordingly, the variable voltage is input to the A / D (analog / digital conversion) port P3 of the control means 10, Through this input voltage, the control means 10 detects the temperature of the freezer compartment.

부호 40은 냉각기의 성에감지수단으로, 써미스터(T2), 저항(R3)(R4), 콘덴서(C2)로 구성되며, 냉각기의 소정부위에 취부된 써미스터(T2)(Negative Temperature Coefficient)가 냉각기 주위의 온도를 감지함에 따라 자체저항이 가변되고, 그에따라 저항(R3)양단의 전압이 가변되어 상기 제어수단(10)의 A/D(아날로그/디지탈변환)포트(P4)에는 가변된 전압이 입력되고, 이 입력전압을 통해 제어수단(10)은 냉각기 주위의 온도를 검출하여 제상완료시점을 판단한다.Reference numeral 40 denotes the frost detection means of the cooler, which is composed of thermistor T2, resistor R3, R4, and condenser C2, and thermistor T2 (Negative Temperature Coefficient) mounted at a predetermined portion of the cooler is surrounded by the cooler. The self-resistance is variable as the temperature of the sensor is sensed, and accordingly, the voltage across the resistor R3 is varied so that the variable voltage is input to the A / D (analog / digital conversion) port P4 of the control means 10. Through this input voltage, the control means 10 detects the temperature around the cooler and determines the completion time of defrosting.

미설명 부호 V1,V2는 각각 전류전압 12V, 5V이다.Reference numerals V1 and V2 denote current voltages 12V and 5V, respectively.

제2도는 본 발명에 의한 제어 흐름도를 나타낸 것으로, 이를 참조하여 본 발명의 작용 및 효과를 상세히 설명한다.2 shows a control flowchart according to the present invention, with reference to this will be described in detail the operation and effect of the present invention.

먼저, 전원(AC)(V1)(V2)을 인가하고 냉장고의 통상운전을 진행하는 가운데 미도시된 압축기의 구동누적시간을 카운트한 제어수단은, 상기 카운트된 압축기의 구동누적시간이 일정시간(예: 8시간)에 이르면 제상시기가 도래했음을 인식하게 된다(S1단계).First, the control means which counts the driving accumulation time of the compressor (not shown) while the power source AC (V1) V2 is applied and normal operation of the refrigerator is performed, the counted driving accumulation time of the compressor is a fixed time ( Example: 8 hours), it is recognized that the defrost time has arrived (step S1).

이때 제어수단(10)은 포트(P2)로 하이레벨신호를 출력하여 인버터(I2)를 통해 릴레이(RY2)를 통전시켜 제상용힌터(HTR)를 발열시켜준다(S2단계).At this time, the control means 10 outputs a high level signal to the port P2 and energizes the relay RY2 through the inverter I2 to generate the defrosting hinder HTR (step S2).

여기서, 제어수단(10)은 냉동실 온도감지수단(30)을 통해 입력되는 값을 검출하여 냉동실의 온도가 제상시에도 식품의 온도유지에 보상을 받을 수 있는 최하의 온도(예: 영하10℃)인가를 판단한다(S3단계).Here, the control means 10 detects a value input through the freezer compartment temperature sensing means 30 and the lowest temperature (eg, minus 10 degrees Celsius) that can be compensated for maintaining the food temperature even when the freezer compartment temperature is defrosted. The authorization is determined (step S3).

상기 S3단계에서 냉동실의 온도가 영하 10℃이하이면 통상의 제상제어모드로 진행하여 냉각기 온도감지수단(40)을 통해 입력되는 값이 제상완료온도인 13℃로 검출되면 히터구동수단(20)으로, 곧 포트(P2)로 출력을 차단하여 제상용히터(HTR)를 오프시켜 제상을 완료한다(S4,S5단계).If the temperature of the freezer compartment in the step S3 is below 10 degrees Celsius or less, proceeds to the normal defrost control mode and when the value input through the cooler temperature sensing means 40 is detected as the defrost completion temperature 13 ℃ to the heater driving means 20 In step S4 and S5, the defrosting heater HTR is turned off to cut off the output to the port P2.

그런, 상기 S3단계에서 냉동실의 온도가 영하 10℃이상으로 검출되면 이는 제상시 냉동실의 온도가 보상되기 어렵다 판단하여 히터구동수단(20)으로, 곧 포트(P1)로는 하이신호를, 포트(P2)로는 로우신호를 출력하여 릴레이(RY1)만 통전되도록 함으로써 전원(AC)이 다이오드(D1)을 통해 제상용히터(HTR)에 인가된다.If the temperature of the freezer compartment is detected to be below 10 ° C. or higher in step S3, it is determined that the temperature of the freezer compartment is difficult to be compensated at the time of defrosting, so that the heater drive means 20 immediately sends a high signal to the port P1, and the port P2. The power supply AC is applied to the defrost heater HTR through the diode D1 by outputting a low signal so that only the relay RY1 is energized.

따라서, 반파전원(AC)의 인가로 제상용히터(HTR)의 발열량은 전파전원(AC)의 전력량(약 143W(와트))에 비해 약 75W로, 50%가 감소된 발열량을 갖게된다. 그 결과 제상시 냉동실에 미치는 온도의 영향을 최소화 하게 된다(S6 단계).Therefore, the heat generation amount of the defrost heater HTR is approximately 75W compared to the power amount of the radio wave power source AC (about 143W (watts)) due to the application of the half-wave power source AC, and thus has a 50% reduction in heat generation amount. As a result, the effect of temperature on the freezer during defrosting is minimized (step S6).

이와같은 제상시 실시된후 냉각기 온도감지수단(40)을 통해 입력되는 값이 제상완료온도인 13℃로 검출되면 포트(P1)로 출력을 차단하여 제상용히터(HTR)를 오프시켜 제상을 완료하거나 상기 냉각기의 온도가 제상완료온도에 이르지 않은 상태에서 일정시간이 경과하면 제상용히터(HTR)의 불량으로 기인되는 제상불량으로 인식하고 역시 제상용히터(HTR)로의 출력을 차단하여 제상을 완료한다.If the value input through the cooler temperature sensing means 40 after the defrosting is detected at 13 ° C., which is the defrosting completion temperature, the defrosting heater HTR is turned off by closing the output to the port P1 to complete the defrosting. Alternatively, if a certain time elapses while the temperature of the cooler does not reach the defrosting completion temperature, the defroster is recognized as a defective defrost due to the deterioration of the defrost heater (HTR), and the output to the defrost heater (HTR) is also cut off to complete defrost. do.

이상에서와 같이 본 발명은 제상시에도 냉동실의 온도관리를 효율적으로 할 수 있어 냉동실에 투입된 식품이 어떠한 조건하에서도 보호를 받게되는 유용한 발명이다.As described above, the present invention is a useful invention that can effectively manage the temperature of the freezer compartment during defrosting, so that the food put into the freezer compartment is protected under any conditions.

Claims (2)

냉각기에 설치된 제상용히터(HTR)를 발열시켜 제상을 행하는 냉장고의 제상회로에 있어서, 발열량이 가변될 수 있도록 제상용히터(HTR)를 구동하는 히터구동수단(20)과; 냉동실의 고내온도를 감지하는 냉동실 온도감지수단(30); 냉각기의 온도를 감지하여 제상완료시점을 검출하는 냉각기 온도감지수단(40); 및 제상시 냉동실의 온도가 일정온도 이상으로 검출되면 상기 히터구동수단(20)으로 제상용히터(HTR)의 발열량이 낮은 단계로 전환되도록 출력한후, 냉각기의 온도가 제상완료온도이거나 제상용히터(HTR) 구동후 일정시간이 경과되면 상기 히터(HTR)의 구동을 중지시켜 제상을 완료하는 제어수단(10)으로 구성된 것을 특징으로 하는 냉장고의 제상회로.CLAIMS 1. A defrost circuit of a refrigerator that generates defrost by heating a defrost heater (HTR) installed in a cooler, comprising: heater driving means (20) for driving a defrost heater (HTR) so that the amount of heat can be varied; A freezer compartment temperature sensing means (30) for sensing the internal temperature of the freezer compartment; Cooler temperature sensing means for sensing the temperature of the cooler to detect the completion time of defrosting (40); And when the temperature of the freezing compartment is detected at a temperature higher than a predetermined temperature, the heater driving means 20 outputs the heat generation amount of the defrost heater HTR to a low level, and the temperature of the cooler is a defrost completion temperature or a defrost heater. The defrost circuit of the refrigerator, characterized in that the control means (10) to stop the drive of the heater (HTR) to complete the defrost when a certain time has passed after the (HTR) drive. 제1항에 있어서, 상기 히터구동수단(20)은 릴레이(RY2)의 온시제상용히터(HTR)에는 전원의 전파전류만이, 릴레이(RY1)의 온시 제상용히터(HTR)에는 다이오드(D1)를 통해 전원의 반파전류만 인가되도록 구성한 것을 특징으로 하는 냉장고의 제상회로.2. The heater driving means (20) according to claim 1, wherein the heater driving means (20) has only a propagation current of a power source in the on-time defrost heater (HTR) of the relay (RY2), and a diode (D1) in the defrost heater (HTR) of the relay (RY1). Defrost circuit of the refrigerator, characterized in that configured to apply only the half-wave current of the power supply through.
KR1019940008436A 1994-04-21 1994-04-21 Defrosting circuit of a refrigerator KR0158014B1 (en)

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KR20010003160A (en) * 1999-06-21 2001-01-15 구자홍 Power supply appratus for defrost heater of refrigerator

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