KR930003104Y1 - Defrosting time control circuit in refrigerator - Google Patents

Defrosting time control circuit in refrigerator Download PDF

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Publication number
KR930003104Y1
KR930003104Y1 KR2019880012408U KR880012408U KR930003104Y1 KR 930003104 Y1 KR930003104 Y1 KR 930003104Y1 KR 2019880012408 U KR2019880012408 U KR 2019880012408U KR 880012408 U KR880012408 U KR 880012408U KR 930003104 Y1 KR930003104 Y1 KR 930003104Y1
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South Korea
Prior art keywords
heater
humidity
refrigerator
evaporator
temperature
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KR2019880012408U
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Korean (ko)
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KR900003358U (en
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김치영
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주식회사 금성사
최근선
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Priority to KR2019880012408U priority Critical patent/KR930003104Y1/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
    • F25D21/008—Defroster control by timer
    • 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
    • F25D2700/00—Means for sensing or measuring; Sensors therefor

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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

내용 없음.No content.

Description

냉장고의 제상시간 제어회로Defrost time control circuit of the refrigerator

제1도는 종래의 제상회로도.1 is a conventional defrost circuit diagram.

제2도는 본 고안 냉장고의 제상시간 제어회로도.2 is a defrost time control circuit diagram of the present invention refrigerator.

제3a도 및 (b)는 습도감지기의 부착위치의 개략도.3A and 3B are schematic views of the attachment position of the humidity sensor.

제4도는 본 고안에 따른 제상 동작 흐름도.4 is a defrost operation flowchart according to the present invention.

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

1 : 온도감지부 2 : 마이콤1: Temperature sensing unit 2: Micom

3 : 습도감지부 41 : 증발기핀3: humidity detection unit 41: evaporator pin

42 : 증발기 파이프 43, H1: 히터42: evaporator pipe 43, H 1 : heater

44, HS1: 습도감지기 TF1: 온도퓨즈44, HS 1 : humidity sensor TF 1 : temperature fuse

Vref : 기준전압 RY1: 릴레이(Relay)Vref: Reference voltage RY 1 : Relay

I1: 인버터 Vcc : 전원단자I 1 : Inverter Vcc: Power terminal

TH1: 더미스터(Thermister) R1: 입력포트TH 1 : Dummymister R 1 : Input port

P2: 출력포트P 2 : Output port

본 고안은 냉장고의 제상회로에 관한 것으로, 특히 제상 시간을 제어함에 있어서 부극성 더미스터 및 저항, 비교기로 구성된 온도감지부를 이용하는 온도 감지방식 대신, 습도 감지기 및 저항으로 구성된 습도감지부를 이용하는 습도 감지 방식을 채택함으로써, 고내온도가 필요이상으로 높아지는 것을 방지할 뿐아니라 증발기의 서리를 소정값 이하로 제거하여 냉장고의 냉각효율을 향상시키기 위한 냉장고의 제상시간 제어회로에 관한 것이다.The present invention relates to a defrosting circuit of a refrigerator, and in particular, in controlling the defrosting time, a humidity sensing method using a humidity sensor and a humidity sensor consisting of a humidity sensor and a resistor instead of a temperature sensing method using a negative sensor, a resistor and a comparator. The present invention relates to a defrosting time control circuit of a refrigerator for improving the cooling efficiency of the refrigerator by not only preventing the internal temperature from becoming higher than necessary but also removing the frost of the evaporator below a predetermined value.

종래의 제상회로는 제1도에 도시한 바와 같이, 전원단자(Vcc)에 접속된 저항(R1)(R3)이 저항(R2) 및 부극성 더미스터(TH1)에 각각 접속되고, 그 접속점은 비교기(CP1)의 반전 및 비반전 입력단자에 접속되어 구성되는 온도감지부(1)의 출력단자가 마이콤(2)의 입력포트(P1)에 접속되며, 그 마이콤(2)의 출력포트(P2)를 인버터(I1)를 통해 릴레이(RY1)코일 양단에 접속된 다이오드(D1)의 애노우드(Anode)측에 접속함과 아울러, 그 릴레이(RY1)의 접점 단자에 히터(H1) 및 온도퓨즈(TF1), 전원(VA)을 직렬로 접속하여, 구성한 것으로 부극성 더미스터(TH1)의 저항값은 온도에 반비례하며, 종래의 제상회로 동작은 다음과 같다.In the conventional defrost circuit, as shown in FIG. 1, the resistors R 1 and R 3 connected to the power supply terminal Vcc are connected to the resistors R 2 and the negative polarity dummy TH 1 , respectively. The connection point is connected to the inverting and non-inverting input terminals of the comparator CP 1 , and the output terminal of the temperature sensing unit 1 is connected to the input port P 1 of the microcomputer 2, and the microcom 2 also the output port (P 2) connected to the anode (anode) side of the diode (D 1) connected across the relay (RY 1) coil via an inverter (I 1) and, at the same time, in that the relay (RY 1) The heater H 1 , the temperature fuse TF 1 , and the power supply V A are connected in series to the contact terminal, and the resistance value of the negative dummy heater TH 1 is inversely proportional to temperature, and the conventional defrosting The operation is as follows.

소정시간동안 압축기가 구동한 뒤에 마이콤(2)의 출력포트(P2)로 고전위가 출력되어 다이오드(D1)의 애노우드측이 저전위가 인가되므로 릴레이(RY1) 코일이 여자되면서 접점단자가 단략되며 히터(H1)가 가열된다. 이 열로 증발기의 서리가 녹음에 따라 증발기의 온도가 상승하면 상기 부극성 더미스터(TH1)의 저항값이 작아져, 기준전압(Vref)보다 저전위인 전압이 온도 감지회로부(1)의 비교기(CP1) 반전단자에 인가되므로, 그 온도감지회로부(1)에서 출력되는 고전위 신호가 마이콤(2)의 입력포트(P1)에 인가된후 이 마이콤(2)의 출력포트(P2)에서 저전위 신호가 출력됨과 아울러 다이오드(D1)의 애노우드측에 고전위가 인가되어 릴레이(RY1) 코일이 여자되지 못해 릴레이(RY1)의 접점단자가 개방되고, 그에 따라 히터(H1)의 가열이 정지되었다.A predetermined time of the compressor is the high potential to the output port (P 2) of the microcomputer (2) after the driving is output while applying an anode side of the low potential of the diode (D 1), so the relay (RY 1) as the coil is woman contact The terminal is shorted and the heater H 1 is heated. When the temperature of the evaporator rises as the frost of the evaporator rises due to this heat, the resistance value of the negative dummy dummy TH 1 becomes small, and a voltage having a potential lower than the reference voltage Vref is a comparator of the temperature sensing circuit unit 1 ( CP 1 ) Since it is applied to the inverting terminal, the high potential signal output from the temperature sensing circuit unit 1 is applied to the input port P 1 of the microcomputer 2, and then the output port P 2 of the microcomputer 2 . The low potential signal is output and the high potential is applied to the anode side of the diode D 1 so that the relay RY 1 coil is not excited and the contact terminal of the relay RY 1 is opened. The heating of 1 ) was stopped.

그러나 더미스터(TH1)는 보호, 취부, 결선 구조등에 의해 외부에 노출되지 않기 때문에 증발기의 온도가 상기 더미스터(TH1)에 전달되기까지는 시간이 걸렸다. 즉 제상동작 완료시의 증발기 온도와 더미스터 감지온도간의 차(이하 온도 편차라 칭함)가 생겼다. 이 온도편차는 히터(H1)의 가열시간이 짧을수록 크다. 그 이유는 적상량에 따라 증발기의 온도는 일정하게 증가하는 반면에 더미스터(TH1)의 감지온도는 시간에 따라 달랐기 때문이다.However, since the dummyster TH 1 is not exposed to the outside due to protection, mounting, or wiring structure, it takes time for the temperature of the evaporator to be transferred to the dummyster TH 1 . That is, a difference (hereinafter referred to as temperature deviation) between the evaporator temperature and the dummyster sensing temperature at the completion of the defrosting operation is generated. This temperature deviation is larger as the heating time of the heater H 1 is shorter. The reason for this is that the temperature of the evaporator is constantly increased according to the loading amount, while the sensing temperature of the dummyster TH 1 is different with time.

그러므로 적상량이 과량이어서 히터(H1)의 가열시간이 길면 온도편차는 작으나 서리를 소정값까지 제거하지 못해 증발기의 냉각효율이 떨어지고, 적상량이 소량이어서 히터(H1)의 가열시간이 짧으면 온도편차는 커져 고내온도가 상승하는 결점이 있었다.Therefore dropwise amount is excessive then the heater (H 1) the heating time is long, the temperature deviation is small, but failed to remove the frost to a predetermined value, the cooling efficiency of the evaporator drops, dropwise a small amount then the heater (H 1) the heating time is shorter the temperature variation in the amount of There was a drawback that the internal temperature increased due to the increase.

본 고안은 이상과 같은 종래의 결점을 감안하여, 히터(H1)의 가열을 중단시키기 위한 회로부를 부극성 더미스터(TH1)로 구성된 온도감지부(1) 대신 습도감지기(HS1)로 구성된 습도 감지부(3)로 교체함으로써 냉각효율저하 및 고내온도 상승이 일어나지 않게 안출한 것으로서, 이를 첨부한 도면에 의거하여 상세히 설명하면 다음과 같다.The subject innovation is a view of the conventional drawbacks, heater polar part a circuit for stopping the heating of (H 1) The Mr (TH 1) temperature consisting of sensor (1) instead of the humidity sensor (HS 1) as described above By replacing with the configured humidity sensing unit (3) to reduce the cooling efficiency and rise in the internal temperature does not occur, described in detail based on the accompanying drawings as follows.

제2도는 본 고안의 회로도로서 이에 도시한 바와 같이, 본 고안은 종래회로의 온도감지부(1)를 습도감지부(3)로 대체하여 구성한 것이다. 즉 전원단자(Vcc)에 접속된 저항(R21)을 습도감지기(HS1)에 접속하여 그 접속점을 마이콤(2)의 입력포트(P1)에 접속하며, 그 마이콤(2)의 출력포트(P2)는 히터(H1)를 구동, 정지시키는 릴레이(RY1)에 인버터(I1)를 통해 접속하고, 상기 습도감지기(HS1)를 제3도의 (a) 및 (b)에 도시한 바와같이, 증발기 파이프(42)의 하단 또는 서리가 많이 생기는 부위에 설치하여 구성한 것으로, 상기 습도감지기(HS1)의 습도에 대한 저항값 특성은 제3도의 (c)와 같으므로 증발기의 서리가 소정값까지 제거되면, 습도감지기(HS1)가 히터(H1)에 근접한 증발기 파이프(42)의 하단에 설치되므로 상기 히터(H1)의 발열에 의해 물기가 마르면서 히터(H1)로 부터 원거리 공간은 습도가 일시적으로 높아지나 히터(H1)에 인접한 증발기 주위의 습도는 인접한 히터(H1)의 계속된 발열로 인하여 오히려 소정 습도 이하로 내려가서 마이콤(2)의 입력포트(P1)에는 고전위가 인가되며, 이에따라 그 출력포트(P2)에서 저전위가 출력되게 되어 있다.2 is a circuit diagram of the present invention, as shown in the present invention, the present invention is configured by replacing the temperature sensing unit 1 of the conventional circuit with the humidity sensing unit (3). That is, the resistor R 21 connected to the power supply terminal Vcc is connected to the humidity sensor HS 1 , and its connection point is connected to the input port P 1 of the microcomputer 2, and the output port of the microcomputer 2 is connected. (P 2) is a heater relay (RY 1) to an inverter connected through (I 1), and the humidity sensor (HS 1) of the third degree (a) and (b) to drive, stop (H 1) As shown, it is configured to be installed at the lower end of the evaporator pipe 42 or a lot of frost, and the resistance value characteristic of the humidity sensor (HS 1 ) with respect to the humidity is the same as (c) of FIG. When frost is removed to a predetermined value, the humidity sensor (HS 1) with a heater while the water by the heat of the heater (H 1) Mar are installed at the bottom of the adjacent evaporator pipe 42 to the (H 1), a heater (H 1 ) a distance space is the humidity of the humidity of the ambient adjacent to the evaporator is temporarily increased beyond the heater (H 1) is a continuation of the adjacent heater (H 1) from the heating Due rather predetermined went down to humidity or less, and is applied with the high potential input port (P 1) of the microcomputer (2), yiettara is so low potential is output at its output port (P 2).

위와같이 구성한 본 고안의 작용 및 효과를 본 고안의 제상 동작 흐름도인 제4도를 참조하여 설명하면 아래와 같다.The operation and effects of the present invention constructed as described above will be described with reference to FIG. 4, which is a defrosting operation flowchart of the present invention.

압축기가 소정기간동안 구동한 뒤에 마이콤(2)의 출력포트(P2)에서 고전위신호가 출력되어 다이오드(D1)의 애노오드측에 저전위가 인가되므로 릴레이(RY1)가 단락되며 이에 따라 히터(H1)가 구동되고, 그 히터(H1)의 구동시간이 제상 설정시간을 경과하게 되면 증발기 주위의 습도에 의해 상기 히터(H1)의 구동이 정지된다. 즉 습도감지기(HS1)는 제상량에 관계없이 히터(H1)의 가열로 녹은 서리의 습도만을 감지하므로 증발기 주위의 습도가 소정습도 이하로 되어야만 상기 습도감지기(HS1)의 저항값시 급격히 커서 마이콤(2)의 입력포트(P1)에 고전위가 인가되며, 그에 따라 상기 마이콤(2)의 출력포트(P2)로 저전위신호가 출력되기 때문에 다이오드(D1)의 애노우드측에는 고전위가 인가되어 히터(H1)의 구동이 정지된다.After the compressor is driven for a predetermined period, a high potential signal is output from the output port P 2 of the microcomputer 2 so that a low potential is applied to the anode side of the diode D 1 , so that the relay RY 1 is shorted. Accordingly, when the heater H 1 is driven and the driving time of the heater H 1 passes the defrost set time, the driving of the heater H 1 is stopped by the humidity around the evaporator. That is, the humidity sensor HS 1 detects only the humidity of the frost melted by the heating of the heater H 1 regardless of the amount of defrosting, so when the humidity around the evaporator is less than a predetermined humidity, the humidity sensor HS 1 suddenly loses the resistance value. cursor is applied to the high potential to the input port (P 1) of the microcomputer (2), the anode side of the diode (D 1), since a low potential signal to the output port (P 2) of the microcomputer (2) output accordingly The high potential is applied to stop driving of the heater H 1 .

따라서 본 고안은 증발기의 온도가 소정온도 이상으로 높아지거나, 서리가 소정값 이상으로 남게되는 경우를 없앰으로써 고내온도상승 또는 냉각효율 저하를 막을 수 있는 효과가 있다.Therefore, the present invention has the effect of preventing the increase in the internal temperature or the lowering of the cooling efficiency by eliminating the case where the temperature of the evaporator is higher than the predetermined temperature or the frost is left above the predetermined value.

Claims (1)

마이콤(2) 및 이 마이콤(2)의 제어를 받아 구동, 정지하는 히터(H1), 그 히터(H1)의 가열시간을 제어하는 릴레이(RY1)를 구비한 냉장고의 제상회로에 있어서, 습도감지기(HS1)에 의해 증발기의 습도를 감지하고 그에따른 상기 습도감지기(HS1)의 저항값 변화에 의한 전압을 상기 마이콤(2)에 입력하여 증발기 주위의 습도값에 따라서 상기 히터(H1)의 발열을 제어하여 제상작용이 수행되도록 하는 습도감지부(3)를 포함하여 구성한 것을 특징으로 하는 냉장고의 제상시간 제어회로.The microcomputer (2) and in the defrost circuit of a refrigerator with a relay (RY 1) for controlling the heating time of the microcomputer (2) under the control the heater (H 1), for driving, the stop of the heater (H 1) The humidity sensor HS 1 senses the humidity of the evaporator and accordingly inputs a voltage according to the resistance value change of the humidity sensor HS 1 to the microcomputer 2 so that the heater according to the humidity value around the evaporator ( Dehumidification time control circuit of the refrigerator comprising a humidity sensor (3) configured to control the heating of the H 1 to perform the defrosting action.
KR2019880012408U 1988-07-29 1988-07-29 Defrosting time control circuit in refrigerator KR930003104Y1 (en)

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Application Number Priority Date Filing Date Title
KR2019880012408U KR930003104Y1 (en) 1988-07-29 1988-07-29 Defrosting time control circuit in refrigerator

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Application Number Priority Date Filing Date Title
KR2019880012408U KR930003104Y1 (en) 1988-07-29 1988-07-29 Defrosting time control circuit in refrigerator

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KR900003358U KR900003358U (en) 1990-02-07
KR930003104Y1 true KR930003104Y1 (en) 1993-05-27

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