KR20080065192A - Apparatus and method for preventing liquid refrigerants inflow of air conditioner - Google Patents

Apparatus and method for preventing liquid refrigerants inflow of air conditioner Download PDF

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Publication number
KR20080065192A
KR20080065192A KR1020070002259A KR20070002259A KR20080065192A KR 20080065192 A KR20080065192 A KR 20080065192A KR 1020070002259 A KR1020070002259 A KR 1020070002259A KR 20070002259 A KR20070002259 A KR 20070002259A KR 20080065192 A KR20080065192 A KR 20080065192A
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South Korea
Prior art keywords
liquid refrigerant
level sensor
accumulator
level
air conditioner
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KR1020070002259A
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Korean (ko)
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곽상호
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주식회사 대우일렉트로닉스
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Priority to KR1020070002259A priority Critical patent/KR20080065192A/en
Publication of KR20080065192A publication Critical patent/KR20080065192A/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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/006—Accumulators
    • 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/28—Means for preventing liquid refrigerant entering into the compressor
    • 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/05—Refrigerant levels
    • 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2515—Flow valves
    • 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/04—Refrigerant level
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Power Engineering (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

An apparatus and a method for preventing liquid refrigerant from being introduced into a compressor of an air conditioner are provided to prevent damage to the compressor by selectively blocking liquid refrigerant introduced into an accumulator. An apparatus for preventing liquid refrigerant from being introduced into a compressor of an air conditioner comprises a first level sensor(150), a second level sensor(160), and a controller. The first level sensor is installed in an accumulator(100) to detect a level of the liquid refrigerant. The second level sensor is installed below the first level sensor to detect a level of the liquid refrigerant. The controller controls the on/off operation of a valve(140) installed in an intake pipe(110) of the accumulator to control the flow rate of the liquid refrigerant introduced into the accumulator.

Description

공기조화기의 액냉매 유입 방지 장치 및 방법{APPARATUS AND METHOD FOR PREVENTING LIQUID REFRIGERANTS INFLOW OF AIR CONDITIONER}Apparatus and method for preventing liquid refrigerant inflow in an air conditioner {APPARATUS AND METHOD FOR PREVENTING LIQUID REFRIGERANTS INFLOW OF AIR CONDITIONER}

도 1은 본 발명에 따른 공기조화기의 액냉매 유입 방지 장치를 개략적으로 도시한 도면.1 is a view schematically showing an apparatus for preventing liquid refrigerant inflow of an air conditioner according to the present invention.

도 2는 본 발명에 따른 공기조화기의 액냉매 유입 방지 장치의 구성을 도시한 블럭도.Figure 2 is a block diagram showing the configuration of the liquid refrigerant inflow prevention device of the air conditioner according to the present invention.

도 3은 본 발명에 따른 공기조화기의 액냉매 유입 방지 방법을 도시한 플로우차트.3 is a flowchart illustrating a liquid refrigerant inflow prevention method of the air conditioner according to the present invention.

(도면의 부호에 대한 설명)(Description of symbols in the drawings)

100: 어큐믈레이터 110: 흡입관100: accumulator 110: suction pipe

120: 토출관 121: 단부120: discharge tube 121: end

122: 오일 리턴홀 130: 스크린122: oil return hole 130: screen

140: 밸브 150: 제 1 레벨 센서140: valve 150: first level sensor

160: 제 2 레벨 센서 170: 제어부160: second level sensor 170: control unit

본 발명은 공기조화기의 액냉매 유입 방지 장치 및 방법에 관한 것으로서, 더욱 상세하게는 어큐믈레이터에 수용되는 액냉매의 수위가 토출관의 단부의 높이 이상으로 상승되는 것을 방지하여 압축기로 유입되는 액냉매가 유입되는 것을 차단함으로써, 액냉매 유입에 따른 압축기의 손상을 방지할 수 있는 공기조화기의 액냉매 유입 방지 장치 및 방법에 관한 것이다.The present invention relates to an apparatus and method for preventing liquid refrigerant inflow of an air conditioner, and more particularly, to prevent a liquid level of a liquid refrigerant contained in an accumulator from rising above a height of an end of a discharge tube, thereby being introduced into a compressor. An apparatus and method for preventing liquid refrigerant inflow of an air conditioner capable of preventing damage to a compressor due to inflow of liquid refrigerant by preventing the introduction of liquid refrigerant.

일반적으로, 공기조화기는 압축기와 응축기, 그리고 모세관과 증발기 등을 구비하여 폐회로를 형성하는 냉동사이클에서 이 냉동사이클을 순환하는 냉매가 기화 또는 액화됨으로써 이루어지는 흡열작용과 발열작용을 이용하여 주위를 냉방 또는 난방시키는 장치이다.In general, an air conditioner includes a compressor, a condenser, a capillary tube, and an evaporator to cool the surroundings by using an endothermic action and an exothermic action caused by vaporization or liquefaction of a refrigerant circulating through the refrigeration cycle. It is a device for heating.

여기서, 압축기는 흡입되는 냉매를 고온 고압으로 압축하여 토출하는 장치로서, 흡입되는 냉매 중에 액상의 냉매가 유입되면 압축기가 파손되는 문제가 종종 발생한다.Here, the compressor is a device for compressing and discharging the sucked refrigerant at a high temperature and high pressure, and often causes a problem that the compressor is damaged when a liquid refrigerant is introduced into the sucked refrigerant.

따라서, 압축기의 흡입측에는 어큐믈레이터(accumulator)가 설치되고, 이 어큐믈레이터는 증발기로부터 유입되는 냉매 중에서 액체상태로 남아 있는 냉매를 걸러줌과 동시에 오일을 압축기로 공급하는 역할을 한다.Therefore, an accumulator is installed at the suction side of the compressor, and the accumulator filters the refrigerant remaining in the liquid state from the refrigerant flowing from the evaporator and simultaneously supplies oil to the compressor.

그러나, 종래의 어큐믈레이터는 공기조화기가 과부하 운전 등의 이상 운전을 하는 경우에는 과다하게 유입되는 액상의 냉매를 전부 걸러내지 못하는 한계가 있었다.However, the conventional accumulator has a limitation in that it does not filter out all of the liquid refrigerant that is excessively introduced when the air conditioner performs abnormal operation such as overload operation.

대안적으로는 어큐믈레티어의 사이즈를 크게 설계하여 설치하기도 하지만, 이러한 경우에는 설치 공간 및 제조원가 상승의 문제가 있다.Alternatively, the accumulator may be designed to be large in size and installed, but in this case, there is a problem of increased installation space and manufacturing cost.

상기한 문제점을 해결하기 위하여 본 발명은 어큐믈레이터에 수용되는 액냉매의 수위를 조절하여 압축기로 액냉매가 유입되는 것을 차단함으로써, 액냉매 유입에 따른 압축기의 손상을 방지할 수 있는 공기조화기의 액냉매 유입 방지 장치 및 방법을 제공하는 것을 목적으로 한다.In order to solve the above problems, the present invention adjusts the level of the liquid refrigerant contained in the accumulator to block the liquid refrigerant from entering the compressor, thereby preventing the damage of the compressor due to the liquid refrigerant inflow An object of the present invention is to provide a liquid refrigerant inflow preventing apparatus and method.

상기한 목적을 달성하기 위하여 본 발명에 따른 공기조화기의 액냉매 유입 방지 장치는 어큐믈레이터의 내부에 설치되어 액냉매의 수위를 감지하는 제 1 레벨 센서; 상기 제 1 레벨 센서보다 소정높이 하측에 설치되어 액냉매의 수위를 감지하는 제 2 레벨 센서; 및 상기 제 1 레벨 센서 및 제 2 레벨 센서로부터 감지된 신호에 따라 상기 어큐믈레이터로 유입되는 냉매를 제어하기 위해 상기 어큐믈레이터의 흡입관에 설치된 밸브가 개방 또는 폐쇄되도록 하는 제어부를 포함하는 것을 특징으로 한다.In order to achieve the above object, an apparatus for preventing liquid refrigerant inflow of an air conditioner according to the present invention includes: a first level sensor installed inside an accumulator to sense a level of the liquid refrigerant; A second level sensor installed below the first level sensor to detect a level of the liquid refrigerant; And a control unit configured to open or close a valve installed in the suction pipe of the accumulator to control the refrigerant flowing into the accumulator according to the signals sensed by the first level sensor and the second level sensor. It is done.

바람직하게는, 상기 밸브는 개도량의 조절이 가능한 솔레노이드 밸브인 것을 특징으로 한다.Preferably, the valve is characterized in that the solenoid valve which can adjust the opening amount.

또한, 본 발명에 따른 공기조화기의 액냉매 유입 방지 방법은 어큐믈레이터 의 내부에 설치된 제 1 레벨 센서 및 상기 제 1 레벨 센서로부터 하측으로 일정높이 이격되어 설치된 제 2 레벨 센서를 통해 액냉매의 수위를 감지하는 단계; 상기 제 1 레벨 센서를 통해 액냉매가 감지되면, 제어부가 어큐믈레이터의 흡입관에 설치된 밸브를 폐쇄하는 단계; 및 상기 제 2 레벨 센서를 통해 액냉매가 감지되지 않으면, 상기 밸브를 개방하는 단계를 포함하는 것을 특징으로 한다.In addition, the liquid refrigerant inflow prevention method of the air conditioner according to the present invention is the liquid level of the refrigerant through the first level sensor installed inside the accumulator and the second level sensor spaced at a predetermined height downward from the first level sensor Sensing the water level; Closing the valve installed in the suction pipe of the accumulator, when the liquid refrigerant is sensed through the first level sensor; And if the liquid refrigerant is not detected through the second level sensor, opening the valve.

이하, 본 발명의 바람직한 실시예를 첨부된 도면을 참조하여 상세하게 설명한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 따른 공기조화기의 액냉매 유입 방지 장치를 개략적으로 도시한 도면이고, 도 2는 본 발명에 따른 공기조화기의 액냉매 유입 방지 장치의 구성을 도시한 블럭도이며, 도 3은 본 발명에 따른 공기조화기의 액냉매 유입 방지 방법을 도시한 플로우차트이다.1 is a view schematically showing an apparatus for preventing liquid refrigerant inflow of an air conditioner according to the present invention, and FIG. 2 is a block diagram illustrating a configuration of an apparatus for preventing liquid refrigerant inflow of an air conditioner according to the present invention. 3 is a flowchart showing a liquid refrigerant inflow prevention method of the air conditioner according to the present invention.

도 1 내지 도 2에 도시된 바와 같이, 어큐믈레이터(100)의 상측에는 증발기에서 열교환된 냉매가 흡입되는 흡입관(110)이 설치되고, 흡입관(110)의 일측에는 단부(121)가 어큐믈레이터(100)의 내부에 위치되며 압축기로 오일을 공급하기 위한 오일 리턴홀(122)이 하부에 형성된 'U'자 형상의 토출관(120)이 설치된다.1 and 2, an upper side of the accumulator 100 is provided with a suction tube 110 through which the refrigerant exchanged with the evaporator is sucked, and one end of the suction tube 110 accumulates the end 121. The discharge tube 120 having a 'U' shape is disposed in the lower part of the generator 100 and has an oil return hole 122 for supplying oil to the compressor.

또한, 어큐믈에이터(100)의 상부 즉, 흡입관(110)의 하측에는 수평방향으로 스크린(130)이 설치되어 흡입되는 냉매 중에 포함된 불순물을 여과한다.In addition, the upper portion of the accumulator 100, that is, the lower side of the suction pipe 110, the screen 130 is installed in the horizontal direction to filter impurities contained in the refrigerant sucked.

이때, 흡입되는 냉매의 유로를 선택적으로 개폐할 수 있도록 흡입관(110)에는 밸브(140)가 설치되고, 어큐믈레이터(100)의 내부에는 토출관(120)의 단부(121) 보다 소정높이 하측에 액냉매의 수위를 감지하는 제 1 레벨 센서(150)가 설치되며, 제 1 레벨 센서(160)로부터 소정높이 하측에는 제 2 레벨 센서(160)가 설치되어 액냉매의 수위를 감지한다.At this time, the valve 140 is installed in the suction pipe 110 so as to selectively open and close the flow path of the refrigerant to be sucked, and inside the accumulator 100, a predetermined height lower than the end 121 of the discharge pipe 120. The first level sensor 150 for detecting the level of the liquid refrigerant is installed, the second level sensor 160 is installed below the predetermined height from the first level sensor 160 to detect the level of the liquid refrigerant.

또한, 제 1 레벨 센서(150) 및 제 2 레벨 센서(160)로부터 감지된 액냉매의 수위 정보에 따라 흡입관(110)에 설치된 밸브(140)의 개폐를 제어하는 제어부(170)가 구비되어, 어큐믈레이터(100)에 수용된 액냉매의 수위에 따라 밸브(140)의 개폐를 조절하여 액냉매가 과다하게 압축기로 유입되는 것을 방지한다.In addition, the controller 170 is configured to control the opening and closing of the valve 140 installed in the suction pipe 110 according to the water level information of the liquid refrigerant detected from the first level sensor 150 and the second level sensor 160, The opening and closing of the valve 140 is adjusted according to the level of the liquid refrigerant contained in the accumulator 100 to prevent excessive liquid refrigerant from flowing into the compressor.

상기와 같이, 본 발명에 따른 공기조화기의 액냉매 유입 방지 장치는 흡입관(110)에 설치된 밸브(140)와, 어큐믈레이터(100)의 내부에 서로 일정간격 이격되도록 설치되어 액냉매의 수위를 감지하는 제 1 레벨 센서(150) 및 제 2 레벨 센서(160)와, 제 1 레벨 센서(150) 및 제 2 레벨 센서(160)로부터 감지된 액냉매의 수위에 따라 밸브(140)의 개폐를 제어하는 제어부(170)를 포함하여 구성된다.As described above, the liquid refrigerant inflow prevention device of the air conditioner according to the present invention is installed to be spaced apart from each other by a predetermined interval in the valve 140 and the accumulator 100 installed in the suction pipe 110, the level of the liquid refrigerant. Opening and closing of the valve 140 according to the level of the liquid refrigerant sensed by the first level sensor 150 and the second level sensor 160 and the first level sensor 150 and the second level sensor 160. It is configured to include a control unit 170 for controlling.

구체적으로, 제 1 레벨 센서(150)를 통해 어큐믈레이터(100)에 수용된 액냉매가 감지되면, 제어부(170)는 흡입관(110)에 설치된 밸브(140)에 제어신호를 출력하여 밸브(140)가 폐쇄되도록 한다.Specifically, when the liquid refrigerant contained in the accumulator 100 is detected through the first level sensor 150, the control unit 170 outputs a control signal to the valve 140 installed in the suction pipe 110 to control the valve 140. ) To close.

밸브(140)가 폐쇄되면, 증발기를 거쳐 어큐믈레이터(100)로 흡입되는 냉매의 유입이 중지되고,이에 따라 어큐믈레이터(100) 내부에 수용된 냉매 중 기화된 냉매는 토출관(120)을 통해 압축기로 유입되기 때문에 어큐믈레이터(100) 내부에 수용된 액냉매의 수위는 점차 낮아진다. When the valve 140 is closed, the inflow of the refrigerant sucked into the accumulator 100 through the evaporator is stopped, and accordingly, the refrigerant vaporized in the refrigerant contained in the accumulator 100 may discharge the discharge pipe 120. Since the water flows into the compressor through the level of the liquid refrigerant contained in the accumulator 100 is gradually lowered.

이때, 제 2 레벨 센서(160)에 액냉매가 감지되지 않으면, 즉 어큐믈레이터 (100) 내부에 수용된 액냉매의 수위가 제 2 레벨 센서(160)가 위치된 높이 이하로 낮아지면, 제어부(170)는 밸브(140)가 개방되도록 제어신호를 출력한다.At this time, if the liquid refrigerant is not detected by the second level sensor 160, that is, when the level of the liquid refrigerant contained in the accumulator 100 is lower than the height at which the second level sensor 160 is located, the controller ( 170 outputs a control signal to open the valve 140.

따라서, 흡입관(110)을 통해 냉매의 유입이 시작되며, 어큐믈레이터(100) 내부에 수용된 액냉매의 수위는 점차 높아진다.Therefore, the inflow of the refrigerant is started through the suction pipe 110, the level of the liquid refrigerant contained in the accumulator 100 is gradually increased.

이후, 상술한 바와 같이, 액냉매의 수위에 따라 밸브(140)를 선택적으로 개폐하게 되면, 어큐믈레이터(100)에 수용된 액냉매의 수위가 토출관(120)의 단부(121)가 위치된 높이까지 증가하지 않기 때문에, 압축기로 액냉매가 유입되는 것을 방지할 수 있어 액냉매 유입에 따른 압축기의 손상을 방지할 수 있다. Thereafter, as described above, when the valve 140 is selectively opened and closed according to the level of the liquid refrigerant, the level of the liquid refrigerant contained in the accumulator 100 is located at the end 121 of the discharge pipe 120. Since it does not increase to a height, it is possible to prevent the liquid refrigerant from flowing into the compressor, thereby preventing damage to the compressor due to the liquid refrigerant inflow.

이때, 흡입관(110)에 설치된 밸브(140)는 개도량의 조절이 가능한 솔레노이드 밸브를 사용하여, 어큐믈레이터(100)로 흡입되는 냉매량을 적절히 조절하여 어큐믈레이터(100)의 액냉매 수위가 증가하면, 밸브(140)의 개도량을 줄이고, 액냉매의 수위가 감소되면, 밸브(140)의 개도량을 증가시킴으로서, 압축기로 액냉매가 유입되지 않도록 하는 것이 바람직하다.At this time, the valve 140 installed in the suction pipe 110 is a solenoid valve that can adjust the opening amount, by appropriately adjusting the amount of refrigerant sucked into the accumulator 100 to increase the liquid refrigerant level of the accumulator 100 Increasing the opening amount of the valve 140, and when the water level of the liquid refrigerant is reduced, it is preferable to increase the opening amount of the valve 140, so that the liquid refrigerant does not flow into the compressor.

이하, 도 1 내지 도 3을 참조하여 본 발명에 따른 공기조화기의 액냉매 유입 방지 방법을 설명한다.Hereinafter, a method of preventing liquid refrigerant inflow of an air conditioner according to the present invention will be described with reference to FIGS. 1 to 3.

먼저, 압축기가 구동되어 공기조화기가 작동되면(S100), 어큐믈레이터(100) 내부에 설치된 제 1 레벨 센서(150) 및 제 2 레벨 센서(160)가 작동하여 어큐믈레이터(100) 내부에 수용된 액냉매의 수위를 감지한다(S200).First, when the compressor is driven to operate the air conditioner (S100), the first level sensor 150 and the second level sensor 160 installed in the accumulator 100 operate to operate in the accumulator 100. The level of the received liquid refrigerant is sensed (S200).

제어부(170)는 제 1 레벨 센서(150) 및 제 2 레벨 센서(160)로부터 액냉매의 수위정보를 검출하고, 제 1 레벨 센서(150)를 통해 액냉매가 감지되었는지를 판단한다(S300).The controller 170 detects the liquid level information of the liquid refrigerant from the first level sensor 150 and the second level sensor 160, and determines whether the liquid refrigerant is detected through the first level sensor 150 (S300). .

상기 판단결과, 제 1 레벨 센서(150)를 통해 액냉매가 감지되었다고 판단되면, 제어부(170)는 흡입관(110)에 설치된 밸브(140)에 제어신호를 출력하여 밸브(140)가 폐쇄되도록 함으로써, 흡입관(110)이 폐쇄되도록 한다(S400).As a result of the determination, when it is determined that the liquid refrigerant is detected through the first level sensor 150, the controller 170 outputs a control signal to the valve 140 installed in the suction pipe 110 to close the valve 140. , So that the suction pipe 110 is closed (S400).

따라서, 흡입관(110)을 통해 더이상 냉매가 유입되지 않기 때문에, 어큐믈레이터(100)의 액냉매 수위가 점차 감소된다.Therefore, since the refrigerant is no longer introduced through the suction pipe 110, the liquid refrigerant level of the accumulator 100 is gradually reduced.

이후, 제어부(170)는 제 2 레벨 센서(160)를 통해 액냉매가 감지되는지를 판단하고(S500), 상기 판단결과, 제 2 레벨 센서(160)를 통해 액냉매가 감지되지 않는다고 판단되면, 어큐믈레이터(100)에 수용된 액냉매의 수위가 제 2 레벨 센서(160)의 위치보다 낮아졌다고 판단하여, 밸브(140)에 제어신호를 출력하여 밸브(140)가 개방되도록 함으로써, 흡입관(110)이 개방되도록 한다(S600).Thereafter, the controller 170 determines whether the liquid refrigerant is detected through the second level sensor 160 (S500), and when it is determined that the liquid refrigerant is not detected through the second level sensor 160, It is judged that the level of the liquid refrigerant contained in the accumulator 100 is lower than the position of the second level sensor 160, and outputs a control signal to the valve 140 to open the valve 140, the suction pipe 110 ) To be opened (S600).

따라서, 흡입관(110)을 통해 액냉매의 유입이 재개됨으로써, 어큐믈레이터(100) 내부의 액냉매 수위가 점차 상승한다.Therefore, the inflow of the liquid refrigerant through the suction pipe 110 is resumed, so that the liquid refrigerant level inside the accumulator 100 gradually increases.

본 발명에 따른 공기조화기의 액냉매 유입 방지 방법은 상술한 바와 같이, 액냉매의 수위가 일정높이 이상이 되면, 밸브(140)를 폐쇄하여 냉매 유입을 차단하고, 액냉매의 수위가 일정높이 이하로 낮아지면, 다시 밸브(140)를 개방하여 냉매 유입을 재개함으로써, 액냉매의 수위가 제 1 레벨 센서(150)가 위치된 높이 이상으로 상승하는 것을 방지할 수 있어 압축기로 액냉매가 유입되는 것을 방지할 수 있다.As described above, the liquid refrigerant inflow prevention method of the air conditioner according to the present invention, when the level of the liquid refrigerant is above a certain height, the valve 140 is closed to block the refrigerant flow, the level of the liquid refrigerant is a certain height When lowered below, by opening the valve 140 again and resuming the refrigerant flow, it is possible to prevent the liquid level of the liquid refrigerant from rising above the height at which the first level sensor 150 is located, so that the liquid refrigerant flows into the compressor. Can be prevented.

상기한 바와 같이 본 발명은 어큐믈레이터에 수용되는 액냉매의 수위가 토출관의 단부가 위치된 높이 이상으로 상승되는 것을 방지하기 위하여 어큐믈레이터로 유입되는 냉매의 유입을 선택적으로 차단함으로써, 압축기로의 액냉매 유입을 차단할 수 있어 압축기로의 액냉매 유입에 따른 압축기의 손상을 방지할 수 있는 효과가 있다.As described above, the present invention provides a compressor by selectively blocking the inflow of the refrigerant flowing into the accumulator in order to prevent the level of the liquid refrigerant contained in the accumulator from rising above the height at which the end of the discharge tube is located. It is possible to block the liquid refrigerant inlet to the furnace has the effect of preventing damage to the compressor due to the liquid refrigerant inlet to the compressor.

Claims (3)

어큐믈레이터의 내부에 설치되어 액냉매의 수위를 감지하는 제 1 레벨 센서;A first level sensor installed inside the accumulator to sense the level of the liquid refrigerant; 상기 제 1 레벨 센서보다 소정높이 하측에 설치되어 액냉매의 수위를 감지하는 제 2 레벨 센서; 및A second level sensor installed below the first level sensor to detect a level of the liquid refrigerant; And 상기 제 1 레벨 센서 및 제 2 레벨 센서로부터 감지된 신호에 따라 상기 어큐믈레이터로 유입되는 냉매를 제어하기 위해 상기 어큐믈레이터의 흡입관에 설치된 밸브가 개방 또는 폐쇄되도록 하는 제어부를 포함하는 것을 특징으로 하는 공기조화기의 액냉매 유입 방지 장치.And a control unit configured to open or close a valve installed in the suction pipe of the accumulator to control the refrigerant flowing into the accumulator according to the signals sensed by the first level sensor and the second level sensor. Liquid refrigerant inflow prevention device of the air conditioner. 제 1 항에 있어서,The method of claim 1, 상기 밸브는 개도량의 조절이 가능한 솔레노이드 밸브인 것을 특징으로 하는 공기조화기의 액냉매 유입 방지 장치.The valve is a liquid refrigerant inflow prevention device of the air conditioner, characterized in that the solenoid valve capable of adjusting the opening amount. 어큐믈레이터의 내부에 설치된 제 1 레벨 센서 및 상기 제 1 레벨 센서로부터 하측으로 일정높이 이격되어 설치된 제 2 레벨 센서를 통해 액냉매의 수위를 감지하는 단계;Detecting the level of the liquid refrigerant through a first level sensor installed inside the accumulator and a second level sensor spaced apart from the first level sensor by a predetermined height downward; 상기 제 1 레벨 센서를 통해 액냉매가 감지되면, 제어부가 어큐믈레이터의 흡입관에 설치된 밸브를 폐쇄하는 단계; 및Closing the valve installed in the suction pipe of the accumulator, when the liquid refrigerant is sensed through the first level sensor; And 상기 제 2 레벨 센서를 통해 액냉매가 감지되지 않으면, 상기 밸브를 개방하 는 단계를 포함하는 것을 특징으로 하는 공기조화기의 액냉매 유입 방지 방법.If the liquid refrigerant is not detected through the second level sensor, the liquid refrigerant inflow prevention method of the air conditioner comprising the step of opening the valve.
KR1020070002259A 2007-01-08 2007-01-08 Apparatus and method for preventing liquid refrigerants inflow of air conditioner KR20080065192A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102038581B1 (en) * 2019-06-18 2019-12-03 주식회사 엘케이에스 Cascade refrigeration, warm water and hot gas defrost system provided with ecofriendly refrigerant and defrost fresh tank

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102038581B1 (en) * 2019-06-18 2019-12-03 주식회사 엘케이에스 Cascade refrigeration, warm water and hot gas defrost system provided with ecofriendly refrigerant and defrost fresh tank

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