KR100550558B1 - A refrigerant stortage alarm method of air conditioner - Google Patents

A refrigerant stortage alarm method of air conditioner Download PDF

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Publication number
KR100550558B1
KR100550558B1 KR1020030080697A KR20030080697A KR100550558B1 KR 100550558 B1 KR100550558 B1 KR 100550558B1 KR 1020030080697 A KR1020030080697 A KR 1020030080697A KR 20030080697 A KR20030080697 A KR 20030080697A KR 100550558 B1 KR100550558 B1 KR 100550558B1
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South Korea
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temperature
outdoor
refrigerant
air conditioner
unit
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KR1020030080697A
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Korean (ko)
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KR20050046435A (en
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송찬호
최창민
장지영
최영섭
차우호
현승엽
조은준
황윤제
유윤호
김철민
이원희
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엘지전자 주식회사
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    • 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
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F24F11/36—Responding to malfunctions or emergencies to leakage of heat-exchange fluid
    • 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
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/52—Indication arrangements, e.g. displays
    • 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
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • 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
    • F24F11/89—Arrangement or mounting of control or safety devices

Abstract

본 발명은 공기조화기의 운전 도중의 실외의 온도 및 실외기의 배관온도와 실내기의 배관온도의 온도차가 공기조화기의 냉매가 정량일 때의 실외의 온도 및 실외기의 배관온도와 실내기의 배관온도의 설정온도차보다 크면, 알림수단을 온시켜 냉매의 부족을 알리므로, 냉매의 부족 여부를 신속하고 정확하게 판단할 수 있고, 별도의 냉매 감지 센서가 불필요한 이점이 있다.According to the present invention, the temperature difference between the outdoor temperature during the operation of the air conditioner and the piping temperature of the outdoor unit and the piping temperature of the indoor unit is equal to the outdoor temperature when the refrigerant of the air conditioner is quantified and the piping temperature of the outdoor unit and the piping temperature of the indoor unit. When the temperature difference is greater than the set temperature difference, the notification means is turned on to inform the shortage of the coolant, so that the shortage of the coolant can be determined quickly and accurately, and there is an advantage that a separate coolant sensor is unnecessary.

공기조화기, 실내기, 실외기, 실내 온도센서, 실내배관 온도센서, 실외배관 온도센서, 알림수단Air conditioner, Indoor unit, Outdoor unit, Indoor temperature sensor, Indoor pipe temperature sensor, Outdoor pipe temperature sensor, Notification means

Description

공기조화기의 냉매 부족 알림 방법{ A refrigerant stortage alarm method of air conditioner }A refrigerant stortage alarm method of air conditioner

도 1은 본 발명에 따른 공기조화기의 냉매 부족 알림 장치 일실시예가 도시된 개략도,1 is a schematic diagram showing an embodiment of the refrigerant shortage notification device of the air conditioner according to the present invention,

도 2는 본 발명에 따른 공기조화기의 냉매 부족 알림 방법 일실시예가 도시된 순서도이다.2 is a flowchart illustrating an embodiment of a method for notifying a refrigerant shortage of an air conditioner according to the present invention.

<도면의 주요 부분에 관한 부호의 설명><Explanation of symbols on main parts of the drawings>

2: 실내기 4: 실내 송풍기2: indoor unit 4: indoor blower

6: 증발기 10: 실외기6: evaporator 10: outdoor unit

12: 실외 송풍기 14: 압축기12: outdoor blower 14: compressor

16: 응축기 18: 팽창기16: condenser 18: inflator

21,22,23,24: 냉매배관 32: 실외 온도센서21, 22, 23, 24: refrigerant piping 32: outdoor temperature sensor

34: 실외배관 온도센서 36: 실내배관 온도센서34: Outdoor piping temperature sensor 36: Indoor piping temperature sensor

38: 제어부 40: 알림수단38: control unit 40: notification means

본 발명은 공기조화기에 관한 것으로서, 특히 냉매의 부족 여부를 온도 조건으로부터 판단하여 외부로 알리는 공기조화기의 냉매 부족 알림 방법에 관한 것이다.The present invention relates to an air conditioner, and more particularly, to a method for notifying a refrigerant shortage of an air conditioner that determines whether a refrigerant is insufficient from a temperature condition and informs the outside.

일반적으로 공기조화기는 보다 쾌적한 실내 환경을 조성하기 위하여 실내를 냉방 또는 난방시키는 장치로서, 실내 공기를 흡입한 후 가열 또는 냉각시켜 실내로 다시 토출한다.In general, the air conditioner is a device for cooling or heating the room in order to create a more comfortable indoor environment.

상기 공기조화기는 실내 공기를 가열 또는 냉각시키기 위해 압축기와 응축기와 팽창기와 증발기로 이루어진 냉동 사이클 장치와, 실내 공기를 증발기 또는 응축기로 송풍시키는 송풍기를 포함하여 구성되고, 크게 분리형(seperate type 또는 split type)과 일체형(window type)으로 구분된다.The air conditioner includes a refrigeration cycle device including a compressor, a condenser, an expander, and an evaporator to heat or cool the indoor air, and a blower for blowing the indoor air to an evaporator or a condenser. ) And one type (window type).

상기한 분리형과 일체형은 기능적으로는 같지만 분리형은 실내측에 증발기가 장착된 실내기를 설치하고 실외측에 압축기와 응축기와 팽창기구가 장착된 실외기를 설치하여 실내기와 실외기를 냉매 배관으로 연결시킨 것이고, 일체형은 실내기와 실외기의 하나의 장치로 일체화하여 가옥의 벽에 구멍을 뚫거나 창에 장치를 걸어서 직접 설치한 것이다.The separation type and the integrated type are functionally the same, but the separation type installs an indoor unit equipped with an evaporator on the indoor side and an outdoor unit equipped with a compressor, a condenser and an expansion device on the outdoor side, and connects the indoor unit and the outdoor unit by a refrigerant pipe. The one-piece unit is one unit of the indoor unit and the outdoor unit, and is directly installed by drilling a hole in the wall of the house or hanging the unit on the window.

상기와 같이 구성된 종래의 공기조화기는 상기 압축기가 온되면, 상기 압축기에서는 고온 고압의 기체 냉매가 토출되고, 토출된 고온 고압의 기체 냉매는 상기 응축기를 통과하면서 주변으로 열을 방출하여 응축되며, 응축된 냉매는 상기 팽 창기를 통과하면서 저온 저압의 2상의 냉매로 팽창되고, 팽창된 냉매는 상기 증발기를 통과하면서 주변의 열을 흡수하여 증발되며, 증발된 냉매는 상기 압축기로 순환되고, 이후 상기의 과정을 반복한다.In the conventional air conditioner configured as described above, when the compressor is turned on, the high temperature and high pressure gas refrigerant is discharged from the compressor, and the discharged high temperature and high pressure gas refrigerant is condensed by releasing heat to the surroundings while passing through the condenser. The refrigerant is expanded into a two-phase refrigerant of low temperature and low pressure while passing through the expander, and the expanded refrigerant absorbs and evaporates the surrounding heat while passing through the evaporator, and the evaporated refrigerant is circulated to the compressor. Repeat the process.

그러나, 종래 기술에 따른 공기조화기는 장기간 사용시 냉매가 줄게 되고, 주기적으로 냉매를 보충해 주어야 하는데, 냉매의 부족 여부를 사용자가 쉽게 확인하기 어렵기 때문에 냉매가 부족한 상태로 상기 공기조화기가 장기간 사용될 수 있고, 냉매를 불필요하게 자주 보충할 수 있는 문제점이 있다.However, the air conditioner according to the prior art reduces the refrigerant when used for a long time, and the refrigerant must be replenished periodically, it is difficult for the user to easily check whether the refrigerant is insufficient, so the air conditioner may be used for a long time in the state of insufficient refrigerant There is a problem that the refrigerant can be replenished unnecessarily frequently.

본 발명은 상기한 종래 기술의 문제점을 해결하기 위하여 안출된 것으로서, 냉매의 부족을 판단하여 사용자에게 쉽게 확인시킬 수 있는 공기조화기의 냉매 부족 알림 방법을 제공하는데 그 목적이 있다.The present invention has been made to solve the above problems of the prior art, an object of the present invention is to provide a refrigerant shortage notification method of the air conditioner that can be easily identified to the user by determining the lack of refrigerant.

상기한 과제를 해결하기 위한 본 발명에 따른 공기조화기의 냉매 부족 알림 방법은 공기조화기의 운전 도중에 실외의 온도와 실외기의 배관온도와 실내기의 배관온도를 감지하는 제 1 단계와; 실외의 온도 및 실외기의 배관온도와 실내기의 배관온도의 온도차를 계산하는 제 2 단계와; 공기조화기의 냉매가 정량일 때의 실외의 온도 및 실외기의 배관온도와 실내기의 배관온도의 차를 계산하여 설정한 설정온도차와, 상기 제 2 단계에서 계산된 온도차를 비교하는 제 3 단계와; 상기 계산된 온도차가 설정온도차보다 크면, 냉매 부족으로 판단하여 알림수단을 온시키는 제 4 단계를 포함하여 구성된 것을 특징으로 한다.Refrigerant shortage notification method of the air conditioner according to the present invention for solving the above problems is a first step of detecting the outdoor temperature, the outdoor pipe temperature and the outdoor pipe temperature during the operation of the air conditioner; Calculating a temperature difference between an outdoor temperature, a pipe temperature of the outdoor unit, and a pipe temperature of the indoor unit; A third step of comparing a set temperature difference set by calculating a difference between an outdoor temperature when the refrigerant of the air conditioner is a fixed quantity and a pipe temperature of the outdoor unit and a pipe temperature of the indoor unit, and the temperature difference calculated in the second step; If the calculated temperature difference is greater than the set temperature difference, it characterized in that it comprises a fourth step of turning on the notification means by determining that the refrigerant is insufficient.

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이하, 본 발명의 실시 예를 첨부된 도면을 참조하여 상세히 설명한다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 따른 공기조화기의 냉매 부족 알림 장치 일실시예가 도시된 개략도이다.1 is a schematic diagram showing an embodiment of the refrigerant shortage notification device of the air conditioner according to the present invention.

본 실시예에 따른 공기조화기는 도 1에 도시된 바와 같이, 실내기(2)에 실내의 공기를 실내기(2) 내부로 흡입한 후 실내로 다시 토출시키는 실내 송풍기(4)와, 냉매가 증발되면서 실내 공기를 냉각시키는 증발기(6)가 설치되고, 실외기(10)에 실외의 공기를 실외기(10) 내부로 흡입시킨 후 실외로 다시 토출시키는 실외 송풍기(12)와, 기체 냉매를 고온 고압으로 압축시키는 압축기(14)와, 압축된 고온 고압 의 기체 냉매가 실외 공기로 열을 방출하면서 응축기(16)와, 응축된 냉매가 팽창되는 팽창기(18)가 설치되며, 상기 증발기(6)와 압축기(14)와 응축기(16)와 팽창기(18)는 냉매배관(21,22,23,24)으로 연결된다.As shown in FIG. 1, the air conditioner according to the present embodiment sucks the indoor air into the indoor unit 2 into the indoor unit 2 and discharges the air back into the room, and the refrigerant evaporates. An evaporator 6 for cooling the indoor air is installed, and an outdoor blower 12 that sucks outdoor air into the outdoor unit 10 and discharges the outdoor air back to the outside, and compresses the gas refrigerant to high temperature and high pressure. And a condenser 16 and an expander 18 in which the condensed refrigerant is expanded while the compressed high temperature and high pressure gas refrigerant discharges heat into the outdoor air, and the evaporator 6 and the compressor ( 14, the condenser 16 and the expander 18 is connected to the refrigerant pipe (21, 22, 23, 24).

상기 팽창기(18)는 상기 증발기(6)의 과열도를 제어할 수 있도록 솔레노이드에 의해 팽창 유로가 가변되어 용량이 조절될 수 있는 전자 팽창 밸브로 이루어진다.The inflator 18 is composed of an electronic expansion valve in which the expansion flow path is variable by the solenoid to control the degree of superheat of the evaporator 6 so that the capacity can be adjusted.

한편, 상기 공기조화기는 상기 증발기와 압축기와 응축기와 팽창기를 순환하는 냉매의 부족 여부를 외부의 사용자 등에게 알려줄 수 있는 냉매량 부족 알림 장치를 더 포함하여 구성된다.On the other hand, the air conditioner is configured to further include a refrigerant amount shortage notification device that can inform the user of the lack of refrigerant circulating the evaporator, compressor and condenser and expander.

상기 냉매량 부족 알림 장치는 실외의 온도(To)를 감지하는 실외 온도센서(32)와, 실외기(20)의 배관온도(Tpo)를 감지하는 실외배관 온도센서(34)와, 실내기(2)의 배관온도(Tpi)를 감지하는 실내배관 온도센서(36)와, 실외의 온도(To) 및 실외기(2)의 배관온도(Tpo)와 실내기(2)의 배관온도(Tpi)를 이용하여 냉매 부족을 판단하고, 그 판단결과에 따른 신호를 출력하는 제어부(38)와, 상기 제어부(38)에서 출력된 신호에 따라 냉매량의 부족을 외부로 알리는 알림수단(40)을 포함하여 구성된다.The refrigerant shortage notification device is an outdoor temperature sensor 32 for detecting an outdoor temperature (To), an outdoor pipe temperature sensor 34 for detecting a pipe temperature (Tpo) of the outdoor unit 20, and the indoor unit (2) Insufficient refrigerant by using the indoor pipe temperature sensor 36 for detecting the pipe temperature Tpi, the outdoor temperature To, the pipe temperature Tpo of the outdoor unit 2, and the pipe temperature Tpi of the indoor unit 2 And a control unit 38 for outputting a signal according to the determination result, and a notifying unit 40 for notifying the lack of refrigerant amount to the outside according to the signal output from the control unit 38.

상기 알림수단(40)은 실외기(10)에 장착되는 것도 가능하나, 사용자 등이 냉매의 부족을 신속하게 확인할 수 있도록 실내기(2)에 장착됨이 바람직하다.The notification means 40 may be mounted to the outdoor unit 10, but it is preferable that the notification unit 40 is mounted to the indoor unit 2 so that a user or the like can quickly check the shortage of the refrigerant.

상기 알림수단(40)은 발광 다이오드(LED: light emission diode) 또는 액정표시장치(LCD: liquid crystal display)등의 표시장치로 이루어지거나, 냉매의 부 족시 경고음을 발생시키는 부져 등의 발성장치로 이루어짐이 바람직하다.The notification means 40 is made of a display device such as a light emitting diode (LED) or a liquid crystal display (LCD), or a voice device such as a buzzer that generates a warning sound when the refrigerant is insufficient. This is preferred.

상기와 같이 구성된 본 발명의 동작을 살펴보면 다음과 같다.Looking at the operation of the present invention configured as described above are as follows.

도 2는 본 발명에 따른 공기조화기의 냉매 부족 알림 방법 일실시예가 도시된 순서도이다.2 is a flowchart illustrating an embodiment of a method for notifying a refrigerant shortage of an air conditioner according to the present invention.

먼저, 공기조화기의 운전 도중에 실외의 온도(To)와 실외기의 배관온도(Tpo)와 실내기의 배관온도(Tpi)를 감지한다.(S1)First, during operation of the air conditioner, the outdoor temperature (To), the pipe temperature (Tpo) of the outdoor unit and the pipe temperature (Tpi) of the indoor unit are detected.

상기 제어부(38)는 실외의 온도(To) 및 실외기의 배관온도(Tpo)와 실내기의 배관온도(Tpi)의 온도차(DELTA T)를 계산한다.(S2)The controller 38 calculates a temperature difference DELTA T between an outdoor temperature To and a pipe temperature Tpo of the outdoor unit and a pipe temperature Tpi of the indoor unit.

여기서, 상기 제어부(38)는 실외의 온도(To)와 실내기의 배관온도(Tpi)의 차를 상기의 온도차(DELTA T)로 하는 것도 가능하고, 실외기의 배관온도(Tpo)와 실내기의 배관온도(Tpi)의 차를 상기 온도차(DELTA T)로 하는 것도 가능하며, 실외의 온도(To)와 실내기의 배관온도(Tpi)의 평균과 실내기의 배관온도(Tpi)의 차를 상기의 온도차(DELTA T)로 하는 것도 가능함은 물론이다.Here, the controller 38 may set the difference between the outdoor temperature To and the piping temperature Tpi of the indoor unit to be the temperature difference DELTA T, and the piping temperature Tpo of the outdoor unit and the piping temperature of the indoor unit. It is also possible to set the difference of Tpi as the temperature difference DELTA T, and the difference between the average of the outdoor temperature To and the piping temperature Tpi of the indoor unit and the piping temperature Tpi of the indoor unit is the above temperature difference DELTA. Of course, it is also possible to set it to T).

상기 제어부(38)는 계산된 온도차(DELTA T)를 설정온도차(DELTA T′)와 비교한다.The controller 38 compares the calculated temperature difference DELTA T with the set temperature difference DELTA T '.

상기 설정온도차(DELTA T′)는 냉매가 정량일 때의 실외의 온도(To′) 및 실외기의 배관온도(Tpo′)와 실내기의 배관온도(Tpi′)를 데이터화한 후 실외의 온도(To′) 및 실외기의 배관온도(Tpo′)와 실내기의 배관온도(Tpi′)의 온도차를 계산하여 사전에 설정한 것이다.The set temperature difference DELTA T 'is the outdoor temperature To' when the refrigerant is quantified, the pipe temperature Tpo 'of the outdoor unit and the pipe temperature Tpi' of the indoor unit, and then the outdoor temperature To '. ) And the temperature difference between the piping temperature (Tpo ') of the outdoor unit and the piping temperature (Tpi') of the indoor unit are calculated and set in advance.

상기 제어부(38)는 계산된 온도차(DELTA T)가 설정온도차(DELTA T′)보다 크면, 냉매 부족으로 판단하여 상기 알림수단(50)을 온시킨다.(S4)If the calculated temperature difference DELTA T is greater than the set temperature difference DELTA T ', the controller 38 determines that the refrigerant is insufficient and turns on the notification means 50. (S4)

한편, 상기 제어부(38)는 냉매 부족을 외부로 알림과 아울러 상기 팽창기(18)를 과열도 제어한다.(S5)On the other hand, the controller 38 not only informs the refrigerant shortage to the outside, but also controls the overheater 18 (S5).

상기와 같이 구성되는 본 발명에 따른 공기조화기의 냉매 부족 알림 방법은 공기조화기의 운전 도중의 실외의 온도 및 실외기의 배관온도와 실내기의 배관온도의 온도차를, 공기조화기의 냉매가 정량일 때의 실외의 온도 및 실외기의 배관온도와 실내기의 배관온도의 설정온도차와 비교하여, 공기조화기의 운전 도중의 온도차가 공기조화기의 냉매가 정량일 때의 설정온도차보다 크면, 냉매 부족으로 판단하여 알림수단을 온시키므로 냉매의 부족 여부를 신속하고 정확하게 판단할 수 있고, 별도의 냉매 감지 센서가 불필요한 이점이 있다.The refrigerant shortage notification method of the air conditioner according to the present invention configured as described above is the temperature difference between the outdoor temperature during the operation of the air conditioner and the piping temperature of the outdoor unit and the piping temperature of the indoor unit, the refrigerant of the air conditioner When the temperature difference during the operation of the air conditioner is greater than the set temperature difference when the refrigerant in the air conditioner is quantitative, compared with the set temperature difference between the outdoor temperature at the time and the piping temperature of the outdoor unit and the piping temperature of the indoor unit, it is determined that the refrigerant is insufficient. By turning on the notification means, it is possible to quickly and accurately determine whether there is a shortage of refrigerant, and there is no need for a separate refrigerant detection sensor.

삭제delete

Claims (4)

삭제delete 삭제delete 공기조화기의 운전 도중에 실외의 온도와 실외기의 배관온도와 실내기의 배관온도를 감지하는 제 1 단계와;A first step of sensing an outdoor temperature, a pipe temperature of an outdoor unit, and a pipe temperature of an indoor unit during operation of the air conditioner; 실외의 온도 및 실외기의 배관온도와 실내기의 배관온도의 온도차를 계산하는 제 2 단계와;Calculating a temperature difference between an outdoor temperature, a pipe temperature of the outdoor unit, and a pipe temperature of the indoor unit; 공기조화기의 냉매가 정량일 때의 실외의 온도 및 실외기의 배관온도와 실내기의 배관온도의 차를 계산하여 설정한 설정온도차와, 상기 제 2 단계에서 계산된 온도차를 비교하는 제 3 단계와;A third step of comparing a set temperature difference set by calculating a difference between an outdoor temperature when the refrigerant of the air conditioner is a fixed quantity and a pipe temperature of the outdoor unit and a pipe temperature of the indoor unit, and the temperature difference calculated in the second step; 계산된 온도차가 설정온도차보다 크면, 냉매 부족으로 판단하여 알림수단을 온시키는 제 4 단계를 포함하여 구성된 것을 특징으로 하는 공기조화기의 냉매 부족 알림 방법.If the calculated temperature difference is greater than the set temperature difference, the refrigerant shortage notification method of the air conditioner, characterized in that it comprises a fourth step of turning on the notification means by determining the refrigerant shortage. 삭제delete
KR1020030080697A 2003-11-14 2003-11-14 A refrigerant stortage alarm method of air conditioner KR100550558B1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106568223A (en) * 2016-10-25 2017-04-19 珠海格力电器股份有限公司 Method and device for controlling refrigerant circulation abnormity of air conditioner as well as air conditioner thereof
CN106595152A (en) * 2016-10-25 2017-04-26 珠海格力电器股份有限公司 Method and device for determining abnormal circulation of air conditioner refrigerants and air conditioner
CN110940048A (en) * 2018-09-21 2020-03-31 奥克斯空调股份有限公司 Refrigerant leakage detection method and air conditioner

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Publication number Priority date Publication date Assignee Title
JP4973345B2 (en) 2007-07-05 2012-07-11 ダイキン工業株式会社 Refrigerant system detection method, refrigerant system detection system, and refrigerant system detection program

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106568223A (en) * 2016-10-25 2017-04-19 珠海格力电器股份有限公司 Method and device for controlling refrigerant circulation abnormity of air conditioner as well as air conditioner thereof
CN106595152A (en) * 2016-10-25 2017-04-26 珠海格力电器股份有限公司 Method and device for determining abnormal circulation of air conditioner refrigerants and air conditioner
CN106595152B (en) * 2016-10-25 2018-12-28 珠海格力电器股份有限公司 A kind of the determination method, apparatus and air-conditioning of air conditioner coolant abnormal circulation
CN106568223B (en) * 2016-10-25 2019-07-30 珠海格力电器股份有限公司 A kind of control method, device and the air-conditioning of the refrigerant circulation exception of air-conditioning
CN110940048A (en) * 2018-09-21 2020-03-31 奥克斯空调股份有限公司 Refrigerant leakage detection method and air conditioner

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