KR20000041340A - Protector for compressor of air conditioner - Google Patents

Protector for compressor of air conditioner Download PDF

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Publication number
KR20000041340A
KR20000041340A KR1019980057191A KR19980057191A KR20000041340A KR 20000041340 A KR20000041340 A KR 20000041340A KR 1019980057191 A KR1019980057191 A KR 1019980057191A KR 19980057191 A KR19980057191 A KR 19980057191A KR 20000041340 A KR20000041340 A KR 20000041340A
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South Korea
Prior art keywords
compressor
liquid refrigerant
air conditioner
evaporator
fan
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KR1019980057191A
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Korean (ko)
Inventor
김순곤
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황한규
만도공조 주식회사
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Priority to KR1019980057191A priority Critical patent/KR20000041340A/en
Publication of KR20000041340A publication Critical patent/KR20000041340A/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/08—Compressors specially adapted for separate outdoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
    • F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/10—Pressure
    • F24F2140/12—Heat-exchange fluid pressure

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

PURPOSE: A protector is provided to extend the life span of a compressor by protecting liquid refrigerant from inletting into the compressor and by preventing an air conditioner from stopping cooling caused by over-cooling in a low temperature. CONSTITUTION: A main power is fed to a compressor(4) and a fan(14) through a connector(50). A control signal is fed to a relay(Ry1). In this state, over-cooling occurs in a condenser as the temperature of an outdoor unit is low. The liquid refrigerant is not fully evaporated by passing through an expanding valve. Thus, one portion of the liquid refrigerant is inlet to an evaporator and then heat exchange ratio is decreased. The liquid refrigerant is inlet to the compressor through a hydraulic pipe connected to the exit of the evaporator. Therefore, the fan stops rotating by switching off with the liquid refrigerant in order to prevent the liquid refrigerant from inletting into the compressor.

Description

에어콘의 압축기 보호장치Air conditioner compressor protector

본 발명은 에어콘의 압축기 보호장치에 관한 것으로서, 특히 실외기에 내설된 팬을 압축기의 유입측 압력에 따라 선택적으로 구동시킴으로써, 응축되는 냉매량을 조절하도록 하여 낮은 온도에서 원활한 냉방운전이 수행될 수 있도록 하는 에어콘의 압축기 보호장치 에 관한 것이다.The present invention relates to a compressor protection device for an air conditioner, and in particular, by selectively driving the fan installed in the outdoor unit according to the inlet pressure of the compressor, so as to adjust the amount of refrigerant to be condensed so that a smooth cooling operation can be performed at a low temperature. A compressor protection device for an air conditioner.

일반적으로 실내 공간의 온도 및 습도를 일정하게 유지하여 일의 능률을 올리도록 하는 것을 공기조화라 하며, 이때 사용되는 인위적인 수단 및 장치를 공기조화장치라 한다. 이 공기조화장치는 실내의 온도를 높이는 온풍기와, 그 온도를 낮추는 에어콘이 있다. 에어콘은 압축된 냉매가 팽창되면서 발생하는 감열작용을 이용하여 흡입된 공기를 냉각시키고, 이 냉각된 공기를 실내로 토출시킴으로써, 실내 온도를 낮추도록 한 것이다.In general, to maintain the temperature and humidity of the indoor space to improve the work efficiency is called air conditioning, and the artificial means and apparatus used at this time is called an air conditioning apparatus. This air conditioner includes a warm air heater to raise the indoor temperature and an air conditioner to lower the temperature. The air conditioner cools the sucked air by using the thermal action generated by the expansion of the compressed refrigerant and discharges the cooled air into the room, thereby lowering the room temperature.

도 1은 일반적인 에어콘의 원리를 도시한 구성도로서, 이를 전체적으로 설명하면, 에어콘은 압축기(4)와 응축기(6)를 제 1캐비닛(8)에 내장한 실외기(2)와, 팽창밸브(18)와 증발기(20)를 제 2캐비닛(22)에 내설한 실내기(16)로 이루어졌다.FIG. 1 is a block diagram showing the principle of a general air conditioner, which will be described as a whole. The air conditioner includes an outdoor unit 2 having a compressor 4 and a condenser 6 in a first cabinet 8, and an expansion valve 18. ) And the evaporator 20 consists of an indoor unit 16 which is built in the second cabinet 22.

여기에서, 제 1캐비닛(8)은 외기를 흡입토록 하는 제 1흡입부(10)와, 흡입된 공기가 응축기(6)를 경유한 후 대기중으로 방출하는 제 1토출부(12)가 설치되어 있고, 그 중간에 설치된 응축기(6)에 가까이 실외기용 블로워(14)가 고정되어 있다.Here, the first cabinet 8 is provided with a first suction unit 10 for sucking the outside air and a first discharge unit 12 for discharging the sucked air to the atmosphere after passing through the condenser 6 is provided. The blower 14 for outdoor unit is fixed to the condenser 6 provided in the middle.

제 2캐비닛(22)은 실내 공기를 흡입하는 제 2흡입부(24)와, 증발기(20)를 거치면서 냉각된 공기를 실내로 방출하는 제 2토출부(26)가 설치되어 있고, 증발기(20)에 가까이 실내기용 블로워(28)가 설치되어 있다. 압축기(4)와 증발기(20)는 흡입파이프(30)로 연결되어 있고, 응축기(6)와 팽창밸브(18)는 토출파이프(32)로 연결되어 냉매가 순환되도록 되어 있다. 또한, 실내,외기용 블로워(28,14)는 전자제어유닛(ECU)에 의해 동시 또는 별도로 구동되도록 설치되어 있다.The second cabinet 22 is provided with a second suction part 24 for sucking indoor air and a second discharge part 26 for discharging the cooled air through the evaporator 20 to the room. An indoor unit blower 28 is provided near 20). The compressor 4 and the evaporator 20 are connected to the suction pipe 30, and the condenser 6 and the expansion valve 18 are connected to the discharge pipe 32 to circulate the refrigerant. In addition, the indoor and outdoor blowers 28 and 14 are installed to be driven simultaneously or separately by an electronic control unit (ECU).

이와 같은 에어콘은 미설명한 스위치를 ON하게 됨과 동시에 제 1캐비닛(8)에 설치된 압축기(4)가 구동하면서 흡입파이프(30)를 통해 증발기(20)를 통과한 가스 상태의 냉매를 흡입하고, 압축한 상태로 응축기(6)로 보내게 된다. 응축기(6)로 유입된 압축된 가스는 제 1흡입부(10)를 통해 유입되는 외기에 의해 냉각되면서 액체 상태로 냉각된 후 팽창밸브(18)를 통과하면서 저온, 저압의 기체 상태로 변환된다.Such an air conditioner turns on the switch described above and at the same time drives the compressor 4 installed in the first cabinet 8 to suck the refrigerant in the gas state passing through the evaporator 20 through the suction pipe 30 and compresses the compressed air. In one state it is sent to the condenser (6). The compressed gas introduced into the condenser 6 is cooled to a liquid state while being cooled by the outside air introduced through the first suction part 10, and then converted into a low temperature, low pressure gas state while passing through the expansion valve 18. .

이 변환된 냉매는 증발기(20)를 통과하면서 그 주위의 공기(실외로부터 흡입된 공기)를 냉각시키는 과정에서 안개 상태로 변환된 후 압축기(4)를 거처 순환되는 과정을 반복하게 된다. 그리고, 냉각된 공기는 실내기용 블로워(28)의 구동에 의해 발생되는 토출력에 의해 실내로 배출된다.The converted refrigerant is converted into a mist state in the process of cooling the air (air sucked from outside) while passing through the evaporator 20, and then the process of circulating through the compressor 4 is repeated. The cooled air is discharged to the room by the earth output generated by the drive of the indoor unit blower 28.

이와 같이, 압축된 냉매가 응축기에서 열교환이 이루어져 액체 상태로 변환되는 과정에 있어 실외온도(약 21°C이하)가 낮은 경우 냉매가 충분히 증발되지 않은 액체 상태로 압축기로 유입됨으로써, 압축기에 무리를 가져오게 하여 수명을 단축시키게 되는 문제점이 있다.As such, when the compressed refrigerant is heat-exchanged in the condenser and is converted to the liquid state, when the outdoor temperature is lower (about 21 ° C or less), the refrigerant flows into the compressor in a liquid state that is not sufficiently evaporated, thereby causing pressure on the compressor. There is a problem that shortens the life by bringing.

따라서, 본 발명은 이와 같은 문제점을 해결하기 위해 안출한 것으로서, 실외기내에 설치된 팬을 압축기의 유입측 압력에 따라 적절히 구동함으로써, 낮은 온도에서 과냉으로 인해 냉방운전이 멈추게 되는 것을 방지하고, 아울러 압축기로 액체상태의 냉매가 유입되는 것을 막아 그 수명을 연장시키도록 하는 에어콘의 압축기 보호장치를 제공하는데 그 목적이 있다.Accordingly, the present invention has been made to solve such a problem, by appropriately driving the fan installed in the outdoor unit according to the inlet pressure of the compressor, to prevent the cooling operation is stopped due to subcooling at a low temperature, and also to the compressor An object of the present invention is to provide a compressor protection device for an air conditioner, which prevents a liquid refrigerant from flowing in and extends its life.

도 1은 일반적인 에어콘의 원리를 도시한 구성도,1 is a block diagram showing the principle of a general air conditioner,

도 2는 본 발명에 따른 압축기 보호장치의 회로도.2 is a circuit diagram of a compressor protection device according to the present invention.

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

4;압축기 14;팬4; compressor 14; fan

40;압력감지용 수단 42;스위치40; pressure sensing means 42; switch

이와 같은 목적을 달성하기 위한 본 발명은 에어콘 실외기에 있어서, 압축기의 유입측에 설치된 압력감지용 수단에 의해 팬 모터가 선택적으로 구동되도록 하는 것을 특징으로 하는 에어콘의 압축기 보호장치를 제공함에 달성된다.The present invention for achieving the above object is achieved in the air conditioner outdoor unit, to provide a compressor protector for the air conditioner, characterized in that the fan motor is selectively driven by the pressure sensing means installed on the inlet side of the compressor.

이하, 본 발명의 실시예를 첨부 도면을 참조하여 설명하면 다음과 같다.Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

도 2는 본 발명에 따른 압축기 보호장치의 회로도이다.2 is a circuit diagram of a compressor protection device according to the present invention.

먼저, 본 실시예를 설명함에 앞서, 종래와 연계하여 설명하면, 도 1에 도시된 바와 같이, 에어콘의 전체적인 구성은 압축기(4)와 응축기(6)를 내장한 실외기(2)와, 팽창밸브(18)와 증발기(20)를 내장한 실내기(16)에 냉매가 순환되도록 설치되어 있다.First, prior to explaining the present embodiment, when described in connection with the prior art, as shown in Figure 1, the overall configuration of the air conditioner is an outdoor unit (2) with a built-in compressor (4) and a condenser (6), expansion valve A refrigerant is circulated in the indoor unit 16 in which 18 and the evaporator 20 are incorporated.

여기에서, 실외기(2)는 제 1흡입부(10)와 제 1토출부(12)가 설치된 제 1캐비닛(8)의 내부에 응축기(6)가 설치되어 있고, 이 응축기(6)에 가까이 실외기용 블로워(14)가 설치되어 있다.Here, the outdoor unit 2 is provided with a condenser 6 inside the first cabinet 8 in which the first suction unit 10 and the first discharge unit 12 are provided, and is close to the condenser 6. The outdoor unit blower 14 is provided.

실내기(16)는 제 2흡입부(24)와 제 2토출부(26)가 설치된 제 2캐비닛(22)내에 증발기(20)가 설치되어 있고, 이 증발기(20)에 가까이 실내기용 블로워(28)가 설치되어 있다.The indoor unit 16 is provided with an evaporator 20 in the second cabinet 22 in which the second suction unit 24 and the second discharge unit 26 are installed, and the blower 28 for the indoor unit is located close to the evaporator 20. ) Is installed.

이와 같이, 압축기로부터 고온, 고압으로 압축된 냉매가 응축기를 통해 액체 상태로 냉각되고, 이어 증발기를 통해 기체 상태로 변환되는 과정에서 외기의 온도가 극히 낮은 경우 냉매중의 일부가 미기화된 액체 상태로 압축기로 유입되는 것을 방지하도록 본 발명에서 압축기(4)의 유입측에 그 내부 압력에 따라 ON/OFF되는 압력감지용 수단(40)을 설치하고, 이 압력감지용 수단(40)에 팬(14)을 연결하여 선택적으로 구동하도록 하였다.As such, when the refrigerant compressed to a high temperature and high pressure from the compressor is cooled to a liquid state through a condenser, and then the temperature of the outside air is extremely low in the process of being converted into a gas state through an evaporator, a part of the refrigerant is in a micro-vaporized state In the present invention, a pressure sensing means 40 is provided on the inflow side of the compressor 4 in order to prevent the flow into the furnace compressor, and a fan (to the pressure sensing means 40) is provided. 14) is connected to selectively drive.

이 압력감지용 수단(40)은 압축기(4)에 연결된 유입파이프(30)내에 설치되는 것으로 액체 상태인 냉매의 압력과, 기체 상태인 냉매의 압력 차이에 따라 접점과 단락이 되도록 되어 있다.The pressure sensing means 40 is provided in the inlet pipe 30 connected to the compressor 4 so as to be short-circuited with the contact according to the pressure difference between the refrigerant in the liquid state and the pressure between the refrigerant in the gas state.

여기에서, 압력감지 수단(40)은 약 1.2Kg/cm2에서 ON이 되도록 하고, 약 0.2Kg/cm2에서 OFF가 되도록 하는 스위치(42)로 구비하는 것이 바람직하다.Here, it is pressure-sensing means 40 is preferably provided with a switch 42 that are to be ON at about 1.2Kg / cm 2, about to be OFF at 0.2Kg / cm 2.

도 2에 도시된 바와 같이, 에어콘을 가동시키는 메인 전원은 커넥터(50)를 통해 압축기(4)와 팬(14)으로 공급되도록 있고, 이 팬(14)을 제어하는 신호는 커넥터(50)를 거쳐 릴레이(Ry1)를 경유하도록 되어 있다. 또한, 릴레이(Ry1)의 가동접접(Ry1-1)은 팬(14)과 스위치(42)를 접속하고, 이 스위치(42)는 커넥터(50)를 거쳐 압축기(4)로 인가되는 타측라인에 접속되어 있다.As shown in FIG. 2, the main power for operating the air conditioner is supplied to the compressor 4 and the fan 14 through the connector 50, and the signal controlling the fan 14 is connected to the connector 50. Via the relay Ry1. In addition, the movable contact Ry1-1 of the relay Ry1 connects the fan 14 and the switch 42, and the switch 42 is connected to the other line applied to the compressor 4 via the connector 50. Connected.

전원이 인가됨과 동시에 메인전원은 커넥터(50)를 경유하여 압축기(4)와 팬(14)으로 인가되고, 제어신호가 릴레이(Ry1)에 공급되는 가운데 가동접점(Ry1-1)과 스위치(42)가 닫혀(0.2∼5.5Kg/cm2)있어 압축기(4)와 팬(14)이 구동을 하게 되어 정상적인 냉방이 이루어진다.At the same time that power is applied, the main power is supplied to the compressor 4 and the fan 14 via the connector 50, and the control contact is supplied to the relay Ry1. ) Is closed (0.2 ~ 5.5Kg / cm 2 ), the compressor 4 and the fan 14 is driven to achieve normal cooling.

이 상태에서 외기의 온도가 낮아 응축기(6)에서 과냉이 일어나게 되고, 동시에 액체 상태의 냉매는 팽창밸브(18)를 경유하면서 완전 기화가 되지 않게 된다. 즉, 냉매중의 일부가 액체인 상태로 증발기(20)로 유입됨으로써, 열교환율이 낮아지게 되고, 이 액체 상태의 냉매는 증발기(20)의 배출측에 연결된 유입파이프(30)를 통해 압축기(4)로 유입된다.In this state, the temperature of the outside air is low to cause subcooling in the condenser 6, and at the same time, the refrigerant in the liquid state is not completely vaporized via the expansion valve 18. That is, the heat exchange rate is lowered by flowing into the evaporator 20 in a state where a part of the refrigerant is liquid, and the refrigerant in the liquid state is supplied to the compressor through the inlet pipe 30 connected to the discharge side of the evaporator 20. 4) flows into.

이때, 이 유입파이프(30)내에 액체 상태의 냉매가 있을 경우 그 압력이 약 1.2∼4.5Kg/cm2가 됨으로써, 스위치(42)가 OFF되어 팬(14)을 정지시키게 된다. 즉, 실외에 설치된 응축기(6)에서 열교환이 적게 일어나도록 하여 증발기(20)내로 유입되는 기화율을 높이게 된다.At this time, when there is a liquid refrigerant in the inflow pipe 30, the pressure is about 1.2 to 4.5 Kg / cm 2 , whereby the switch 42 is turned off to stop the fan 14. That is, less heat exchange occurs in the condenser 6 installed outdoors, thereby increasing the vaporization rate flowing into the evaporator 20.

그 결과, 압축기(4)내로 액체 상태의 냉매가 유입되는 것을 방지하게 된다.As a result, the liquid refrigerant is prevented from flowing into the compressor 4.

이상에서 살펴 본 바와 같이, 본 발명은 압축기의 유입측에 내부 압력의 변화에 따라 ON/OFF되는 수단을 설치하여 실외기내에 고정된 팬 모터를 제어함으로써, 실외 온도가 낮은 상태에서도 원활한 냉각이 이루어지도록 하고, 아울러 압축기에 걸리게 되는 부하를 낮추어 그 수명을 연장시킨 이점이 있다.As described above, the present invention is installed on the inlet side of the compressor in accordance with the change in the internal pressure means to control the fan motor fixed in the outdoor unit, so that smooth cooling even in a low outdoor temperature state In addition, there is an advantage that the load on the compressor is lowered to extend its life.

Claims (2)

에어콘 실외기에 있어서,In the air conditioner outdoor unit, 압축기(4)의 유입측에 설치된 압력감지용 수단(40)에 의해 팬(14)이 선택적으로 구동되도록 하는 것을 특징으로 하는 에어콘의 압축기 보호장치.Compressor protection device for an air conditioner, characterized in that the fan (14) is selectively driven by the pressure sensing means (40) installed on the inlet side of the compressor (4). 제 1항에 있어서,The method of claim 1, 상기 압력감지용 수단(40)은 약 1.2Kg/cm2에서 OFF 되도록 하고, 약 0.2Kg/cm2에서 ON 되도록 하는 스위치(42)로 이루어진 것을 특징으로 하는 에어콘의 압축기 보호장치.The pressure sensing means (40) is a compressor protection device for an air conditioner, characterized in that consisting of a switch 42 to be turned off at about 1.2Kg / cm 2 , and to be turned on at about 0.2Kg / cm 2 .
KR1019980057191A 1998-12-22 1998-12-22 Protector for compressor of air conditioner KR20000041340A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114777312A (en) * 2022-05-17 2022-07-22 宁波奥克斯电气股份有限公司 Low-temperature refrigeration continuous operation control method and device, air conditioner and storage medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114777312A (en) * 2022-05-17 2022-07-22 宁波奥克斯电气股份有限公司 Low-temperature refrigeration continuous operation control method and device, air conditioner and storage medium
CN114777312B (en) * 2022-05-17 2023-08-18 宁波奥克斯电气股份有限公司 Low-temperature refrigeration continuous operation control method and device, air conditioner and storage medium

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