KR100259921B1 - Bimetal control defrosting circuit - Google Patents

Bimetal control defrosting circuit Download PDF

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Publication number
KR100259921B1
KR100259921B1 KR1019970056505A KR19970056505A KR100259921B1 KR 100259921 B1 KR100259921 B1 KR 100259921B1 KR 1019970056505 A KR1019970056505 A KR 1019970056505A KR 19970056505 A KR19970056505 A KR 19970056505A KR 100259921 B1 KR100259921 B1 KR 100259921B1
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South Korea
Prior art keywords
defrost
circuit
compressor
contact
temperature
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KR1019970056505A
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Korean (ko)
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KR19990034809A (en
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최정석
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구자홍
엘지전자주식회사
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/002Defroster control
    • F25D21/006Defroster control with electronic control circuits
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/02Detecting the presence of frost or condensate
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/06Removing frost
    • F25D21/08Removing frost by electric heating
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2400/00General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
    • F25D2400/02Refrigerators including a heater

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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

PURPOSE: A bi-metal control defrost circuit is provided to reduce cost, simplify the circuit configuration and improve defrost efficiency by determining defrost time and heating time through the use of a three-contact bi-metal. CONSTITUTION: A bi-metal control defrost circuit comprises a three-contact bi-metal(20) arranged in the chiller and which senses the frost formation state of the surface of the chiller and controls heating operation of the defrost heater; a static characteristic starter(16) for preventing damage to circuit or bad influence to power caused due to large volume of starting current flowing through a compressor(12); a thermostat(11) for driving the compressor and a freezing fan motor(18) when the temperature of the chiller reaches the predetermined temperature; a defrost heater(15) which heats by the current applied by the switching operation of the three-contact bi-metal and melts the frost formed at the chiller; and a door switch(17) turning on/off in accordance with opening/closure of the refrigerating compartment door.

Description

바이메탈 제어형 제상회로{BIMETAL CONTROL DEFROSTING CIRCUIT}Bimetal Controlled Defrost Circuit {BIMETAL CONTROL DEFROSTING CIRCUIT}

본 발명은 바이메탈 제어형 제상회로에 관한 것으로, 특히 기계식 냉장고의 제상회로에 있어서, 제상 타이머를 사용하지 않고, 3접점 바이메탈을 이용하여 냉각기에 부착된 서리량을 감지하여 제상시기를 결정하여 주는 바이메탈 제어형 제상회로에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bimetal controlled defrost circuit, and particularly, in a defrost circuit of a mechanical refrigerator, without using a defrost timer, using a three-contact bimetal to detect an amount of frost attached to a cooler to determine a defrost time. It relates to a defrost circuit.

도1은 종래 바이메탈 제어형 제상회로의 구성을 보인 회로도로서, 이에 도시된 바와 같이 제상타이머(10)는 압축기 운전중에는 서머스탯(Thermostat, 11)에 의해 단속이 되고, 상기 제상타이머(10)의 접점이 ③∼④구간에 있어 압축기(12)쪽으로 전류가 흐르게 하며, 이러한 상기 제상타이머(10)는 그의 내부의 기구적 메카니즘에 의해 6시간 45분마다 즉, 압축기 운전시간이 제상을 실시하게 설정된 6시간 45분의 될 때 접점이 ③∼④구간에서 ③∼②구간으로 이동되도록 되어 있으며, 이와같이 이동된 접점에 의해 상기 압축기(12)쪽으로의 전류는 차단되고, 바이메탈식 온도감지기인 디프써머(DEF. Thermo, 13), 퓨즈(14) 및 제상히터(15)쪽으로 전류가 흐르며, 그 전류에 의해 상기 제상히터(15)를 발열시켜 냉각기(미도시)에 부착된 얼음(성에)을 녹여주며, 이때 제상타이머(10)의 타이머(①)의 저항이 크기 때문에 전류는 제상타이머(10)의 타이머(①)쪽으로 흐르지 않는다.1 is a circuit diagram illustrating a conventional bimetal controlled defrost circuit. As shown in FIG. 1, the defrost timer 10 is interrupted by a thermostat 11 during operation of a compressor, and the contact point of the defrost timer 10 is shown. The current flows toward the compressor 12 in the sections 3 to 4, and the defrost timer 10 is set every 6 hours 45 minutes by the mechanical mechanism therein, that is, the compressor operation time is set to perform defrosting. When the time is 45 minutes, the contact point is moved from the ③ to the ④ section and the ③ to ② section, and the current moved to the compressor 12 is interrupted by the moved contact as described above. Current flows toward the Thermo, 13, fuse 14 and the defrost heater 15, and heats the defrost heater 15 by the current to melt ice (frost) attached to the cooler (not shown), Defrost tie Since the resistance of the timer (1) of the head (10) is large, current does not flow toward the timer (1) of the defrost timer (10).

상기 제상히터(15)가 통전되어 제상이 끝나는 시점을 결정하는 것은 상기 디프써머(13)에서 감지하는 온도가 일정한 온도(11℃)로 상승하게 되어 상기 디프써머(13)의 접점이 오프될때이고, 이때는 상기 제상타이머(10)의 타이머(①)와 제상히터(15)가 직렬로 되어 전류가 흐르는데 상기 제상타이머(10)의 타이머(①) 저항이 1000Ω 이상이므로, 미미한 전류가 흐르게 되며, 상기 제상히터(15)의 발열은 없으나 상기 제상타이머(10)는 동작을 하고, 상기 제상히터(15)쪽으로 흐르는 전류가 차단되어 디프써머(13) 오프후, 5분의 휴지시간을 가진 뒤 상기 제상타이머(10)의 접점은 ③∼②구간에서 ③∼④구간으로 다시 복귀되며, 그 후 온도가 계속 내려가면 상기 디프써머(13)가 온되어 압축기(12) 운전을 할 수 있도록 함으로써, 제상사이클이 완전히 종료된다.The defrost heater 15 is energized to determine the point at which the defrost ends when the temperature sensed by the deep thermomer 13 rises to a constant temperature (11 ° C.) and the contact of the deep thermomer 13 is turned off. At this time, since the timer (①) and the defrost heater (15) of the defrost timer (10) is in series and current flows, the resistance of the timer (①) of the defrost timer (10) is 1000 Ω or more, so that a slight current flows. There is no heat generation of the defrost heater 15, but the defrost timer 10 operates, and the current flowing to the defrost heater 15 is cut off, and after the deep summer 13 is turned off, the defrost heater 15 has a rest time and then the defrost. The contact point of the timer 10 is returned to the section ③ to ④ from section ③ to ② again. After that, when the temperature continues to fall, the deep summer 13 is turned on so that the compressor 12 can be operated. This ends completely.

상기와 같이 종래의 기술에 있어서는 제상타이머의 주기는 기구적으로 6시간 45분마다 접점이 디프써머쪽으로 이동되어 제상히터를 발열시켜 주어 냉각기의 착상량에 상관없이 제상타이머의 주기에 따라 제상을 함으로써, 제상효율이 낮아지고, 또한 별도의 제상타이머를 사용해야 함으로써, 비용상승 및 결선상의 복잡성이 생기는 문제점이 있었다.As described above, in the related art, the cycle of the defrost timer is mechanically moved to the deep summator every 6 hours and 45 minutes to generate a defrost heater, thereby defrosting according to the cycle of the defrost timer regardless of the amount of cooling of the cooler. In addition, the defrosting efficiency is lowered, and by using a separate defrosting timer, there is a problem in that the cost increases and connection complexity occurs.

따라서, 본 발명은 상기와 같은 종래의 문제점을 해결하기 위하여 창안한 것으로, 제상 타이머를 사용하지 않고, 3접점 바이메탈을 이용하여 냉각기에 부착된 서리량을 감지하여 제상시기를 결정하여 주는 장치를 제공함에 그 목적이 있다.Accordingly, the present invention has been made to solve the above problems, and provides a device for determining the defrost time by detecting the amount of frost attached to the cooler using a three-contact bimetal without using a defrost timer. Has its purpose.

도1은 종래 바이메탈 제어형 제상회로의 구성을 보인 회로도.1 is a circuit diagram showing the configuration of a conventional bimetal controlled defrost circuit.

도2는 본 발명 바이메탈 제어형 제상회로의 구성을 보인 회로도.Figure 2 is a circuit diagram showing the configuration of the present invention bimetal controlled defrost circuit.

도3은 본 발명의 구성인 3접점 바이메탈의 부착 위치를 보인 구성도.Figure 3 is a block diagram showing the attachment position of a three-contact bimetal which is a configuration of the present invention.

***도면의 주요 부분에 대한 부호의 설명****** Description of the symbols for the main parts of the drawings ***

10 : 제상타이머 11 : 써머스탯10: defrost timer 11: thermostat

12 : 압축기 13 : 디프써머12 Compressor 13 Deep Summer

14 : 퓨즈 15 : 제상히터14: fuse 15: defrost heater

16 : 정특성 시동기 17 : 도어스위치16: static starter 17: door switch

18 : 냉동팬 모터 20 : 3접점 바이메탈18: refrigeration fan motor 20: three-contact bimetal

이와 같은 목적을 달성하기 위한 본 발명 바이메탈 제어형 제상회로의 구성은, 냉각기의 일측에 설치되어 그 냉각기 표면의 착상상태를 감지하여 제상히터의 발열을 제어하는 3접점 바이메탈(디프써머)과; 압축기를 통해서 큰 시동 전류가 흘러서 회로를 손상시키거나 전원에 악영향을 주는 것을 방지하기 위한 정특성 시동기와; 냉각기의 온도상승에 의해 변화하는 양을 이용하여 설정 온도까지 올라가면 상기 압축기 및 냉동팬 모터를 구동시키는 써머스탯과; 상기 3접점 바이메탈(디프써머)의 스위칭에 의해 인가된 전류에 의해 발열하여 냉각기에 부착된 얼음(성에)을 녹여주는 제상히터로 구성되어, 상기 3접점 바이메탈에 의해 제상을 실시하고, 써머스탯에 의해 제상을 종료하게 구성함을 특징으로 한다.The bimetal controlled defrost circuit of the present invention for achieving the above object comprises: a three-contact bimetal (dip summer) installed on one side of the cooler to sense an frost state on the surface of the cooler to control the heat generation of the defrost heater; A static starter for preventing a large starting current from flowing through the compressor to damage the circuit or adversely affect the power source; A thermostat for driving the compressor and the refrigeration fan motor when the temperature rises to a predetermined temperature using an amount changed by a temperature rise of the cooler; It is composed of a defrost heater that generates heat by current applied by switching of the three-contact bimetal (dip summer) and melts the ice (frost) attached to the cooler. It is characterized in that the defrost is configured to end.

이하, 본 발명에 따른 실시예를 첨부한 도면을 참조하여 상세히 설명하면 다음과 같다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도2는 본 발명 바이메탈 제어형 제상회로의 구성을 보인 회로도로서, 이에 도시한 바와 같이 냉각기의 일측에 설치되어 표면의 착상상태를 감지하여 제상시기와 제상시간을 결정하여 주는 3접점 바이메탈(디프써머, 20)과; 큰 시동 전류가 흘러서 회로를 손상시키거나 전원에 악영향을 주는 것을 방지하기 위한 정특성 시동기(16)와; 증발기(미도시)에서 토출된 저온, 저압의 냉매증기를 흡입하여 이를 압축함으로써 고온, 고압의 증기로 만드는 압축기(12)와; 온도상승에 의해 변화하는 양을 이용하여 설정 온도까지 올라가면 그에 의한 변화가 온도 상승을 정지시키도록 하는 써머스탯(11)과; 냉기순환 역할을 하여 상기 증발기에서 발생된 냉기를 강제송풍 하는 냉동팬(Fan)을 구동시키는 냉동팬 모터(18)와; 상기 3접점 바이메탈(디프써머, 20)의 스위칭에 의해 인가된 전류에 의해 발열하여 냉각기에 부착된 얼음(성에)을 녹여주는 제상히터(15)와; 냉장실의 도어가 열리고 닫힘에 의해 온/오프되는 도어스위치(17)로 구성한다.2 is a circuit diagram showing the configuration of the bimetal controlled defrosting circuit of the present invention. As shown in FIG. 2, a three-contact bimetal (dimmer 20); A static starter 16 for preventing a large starting current from flowing and damaging the circuit or adversely affecting the power supply; A compressor (12) for making high-temperature and high-pressure steam by sucking and compressing the low-temperature and low-pressure refrigerant vapor discharged from an evaporator (not shown); A thermostat 11 for raising the set temperature by using an amount changed by the temperature rise to stop the temperature rise; A refrigeration fan motor 18 that serves as a cold air circulation to drive a refrigeration fan for forcibly blowing cold air generated in the evaporator; A defrost heater 15 that generates heat by current applied by switching of the three-contact bimetal (dip summer) 20 and melts ice (frost) attached to the cooler; The door of the refrigerating compartment is opened and closed by the door switch 17 is configured.

이와 같이 구성한 본 발명에 따른 실시예의 동작 및 작용 효과를 설명하면 다음과 같다.Referring to the operation and effect of the embodiment according to the present invention configured as described above are as follows.

도3은 본 발명의 구성인 3접점 바이메탈의 부착 위치를 보인 구성도로서, 이에 도시한 바와 같이 종래에는 냉각기의 상단 측면에 위치하던 바이메탈을 본 발명에서는 냉각기의 온도를 잘 감지할 수 있는 하단에 위치하도록 한다.Figure 3 is a block diagram showing the attachment position of the three-contact bimetal which is the configuration of the present invention, as shown in the conventional bimetal that was conventionally located on the upper side of the cooler in the present invention at the lower end that can detect the temperature of the cooler well Position it.

3접점 바이메탈(20)이 부착된 냉각기의 온도특성에 따라 냉각기의 온도가 설정온도보다 높은 온도대에서는 접점이 ①∼②구간으로 온상태가 되어 압축기(12)쪽으로 전류를 흘려주므로, 그 압축기(12)가 구동되어 냉각을 시켜준다.According to the temperature characteristic of the cooler with the three-contact bimetal 20, the contact point is turned on in the sections ① to ② in the temperature range where the temperature of the cooler is higher than the set temperature, so that the current flows toward the compressor 12. 12) is driven to cool.

하지만 냉각기 주변에 착상량이 많아 그 냉각기 주변의 온도가 설정온도보다 낮은 온도대에서는 3접점 바이메탈(20)의 접점이 착상량이 많은 감지상태인 ①∼③ 구간으로 절환되어, 압축기(12)쪽으로의 전류흐름이 차단되고, 제상히터(15)쪽으로 전류가 흐르므로 제상을 시켜준다.However, in the temperature zone where the temperature around the cooler is lower than the set temperature, the contact point of the three-contact bimetal 20 is switched to the detection zones 1 to 3 where the amount of frosting is high, and the current toward the compressor 12 is increased. The flow is blocked, and the current flows toward the defrost heater 15, thereby defrosting.

이때, 상기 제상히터(15)에 투입된 전원은 제상히터(15)를 발열시켜 냉각기 표면온도를 상승시키고, 상승된 표면온도는 설정된 3접점 바이메탈(20)의 작동 규격에 의해 ①∼③ 구간에서 ①∼② 구간으로 되어 다시 압축기(12)를 운전시켜 냉각을 하게되며, 이러한 동작을 반복하면서 냉각과 제상을 한다.At this time, the power supplied to the defrost heater (15) heats the defrost heater (15) to raise the cooler surface temperature, and the elevated surface temperature is ① in the section ① to ③ by the operating standard of the set three-contact bimetal (20) The compressor is cooled again by operating the compressor 12 again, and the cooling and defrosting are repeated.

이상에서 설명한 바와 같이 본 발명 바이메탈 제어형 제상회로는 제상타이머가 없이 디프써머로 제상시기 및 발열시간을 결정함으로써, 비용이 절감되고, 회로의 구성을 단순화하며, 일률적이던 제상시기를 냉각기의 착상상태에 따라 제상시기를 결정하므로 제상효율이 좋아지는 효과가 있다.As described above, the bimetal controlled defrosting circuit of the present invention determines the defrosting time and the heat generation time by using a dip summ without the defrosting timer, thereby reducing the cost, simplifying the configuration of the circuit, and applying the uniform defrosting time to the cooler's frost state. The defrosting time is determined accordingly, and thus the defrosting efficiency is improved.

Claims (1)

냉각기의 일측에 설치되어 온도감지로 그 냉각기 표면의 착상상태를 감지하여 압축기 및 냉동팬모터의 구동을 중지함과 아울러 제상히터의 발열을 제어하는 3접점 바이메탈(디프써머)과; 상기 압축기를 통해서 큰 시동 전류가 흘러서 회로를 손상시키거나 전원에 악영향을 주는 것을 방지하기 위한 정특성 시동기와; 온도상승에 의해 변화하는 양을 이용하여 설정 온도까지 올라가면 상기 압축기 및 냉동팬 모터를 구동시키는 써머스탯과; 상기 3접점 바이메탈(디프써머)의 스위칭에 의해 인가된 전류에 의해 발열하여 상기 냉각기에 부착된 얼음(성에)을 녹여주는 제상히터로 구성하여 된 것을 특징으로 하는 바이메탈 제어형 제상회로.A three-contact bimetal (dip summer) installed on one side of the cooler to sense an idea of the state of the surface of the cooler by sensing the temperature to stop driving the compressor and the refrigeration fan motor and to control the heat generation of the defrost heater; A static starter for preventing a large starting current from flowing through the compressor to damage the circuit or adversely affect the power source; A thermostat for driving the compressor and the refrigeration fan motor when the temperature rises to a predetermined temperature using an amount changed by a temperature increase; Bimetal controlled defrost circuit comprising a defrost heater that generates heat by the current applied by the switching of the three-contact bimetal (dip summer) to melt the ice (frost) attached to the cooler.
KR1019970056505A 1997-10-30 1997-10-30 Bimetal control defrosting circuit KR100259921B1 (en)

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