KR20000073050A - Low pressure side obstruction deciding method for air conditioner - Google Patents

Low pressure side obstruction deciding method for air conditioner Download PDF

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Publication number
KR20000073050A
KR20000073050A KR1019990016071A KR19990016071A KR20000073050A KR 20000073050 A KR20000073050 A KR 20000073050A KR 1019990016071 A KR1019990016071 A KR 1019990016071A KR 19990016071 A KR19990016071 A KR 19990016071A KR 20000073050 A KR20000073050 A KR 20000073050A
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South Korea
Prior art keywords
temperature
low pressure
temperature difference
heat exchanger
difference
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KR1019990016071A
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Korean (ko)
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강병식
김주상
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구자홍
엘지전자 주식회사
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Priority to KR1019990016071A priority Critical patent/KR20000073050A/en
Publication of KR20000073050A publication Critical patent/KR20000073050A/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/30Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32Responding to malfunctions or emergencies
    • F24F11/38Failure diagnosis
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63Electronic processing
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00Control inputs relating to air properties
    • F24F2110/10Temperature
    • F24F2110/12Temperature of the outside air

Abstract

PURPOSE: A method is provided to save such components as a pressure sensor and to protect such components as a compressor by accurately discrimination the clogging of a low pressure portion. CONSTITUTION: An outdoor fan(54) operates while a compressor(56) operates with a certain frequency. A condensate temperature difference between a condensate pipe and an outdoor air is operated. A standard condensate temperature difference between the condensate pipe temperature as a reference value compensated by the temperature of the outdoor air and the ambient air temperature is operated. If the condensate temperature difference measured after a limit time period is over 25% of the standard condensate temperature difference, it is decided that the low pressure portion is clogged. Finally, the clogged state is displayed on a display unit(80).

Description

공기조화기의 저압측 막힘 판단방법 {Low pressure side obstruction deciding method for air conditioner}Low pressure side obstruction deciding method for air conditioner
본 발명은 공기조화기의 저압측 막힘 판단방법에 관한 것으로서, 특히 응축배관온도와 그 주위공기온도와의 차이인 응축온도차와 증발측의 공기온도에 의해 보상된 응축온도차를 비교함으로써 저압측의 막힘 여부를 판단하는 공기조화기의 저압측 막힘 판단방법에 관한 것이다.The present invention relates to a method for judging the low pressure side clogging of an air conditioner. In particular, the low pressure side clogging is compared by comparing a condensation temperature difference, which is a difference between the condensation piping temperature and the ambient air temperature, and a condensation temperature difference compensated by the air temperature on the evaporation side. The low pressure side clogging determination method of the air conditioner for determining whether or not.
일반적으로, 공기조화기에는 여러 개의 밸브가 설치되어 있는데, 냉난방운전시 밸브가 막히는 경우에는 사이클이 제대로 동작하지 않을 뿐만 아니라 압축기 등의 구성요소에 치명적인 영향을 미치게 된다.In general, the air conditioner is provided with a plurality of valves, when the valve is clogged during the heating and cooling operation not only does not cycle properly but also has a fatal effect on components such as compressors.
참조된 도면, 도 1은 종래기술에 의한 공기조화기의 개략적인 구성도이다.1 is a schematic configuration diagram of an air conditioner according to the prior art.
종래의 공기조화기는 도 1에 도시된 바와 같이 냉방운전시에는 증발기로 난방운전시에는 응축기로 동작하는 실내 열교환기(1)와, 냉방운전시에는 응축기로 난방운전시에는 증발기로 동작하는 실외 열교환기(3)와, 상기 실내 열교환기(1) 및 상기 실외 열교환기(3)에 각각 설치된 실내외 팬(2, 4)과, 상기 실내 열교환기(1)와 상기 실외 열교환기(3) 사이에 설치되어 이송되는 냉매가 용이하게 증발될 수 있도록 팽창시키는 팽창밸브(5)와, 증발기로 동작하는 열 교환기로부터 저온저압의 냉매를 흡입하여 고온고압의 냉매로 압축시키는 압축기(6)와, 상기 압축기(6)로부터 토출되는 고온고압의 냉매를 냉방운전시에는 상기 실외 열교환기(3)로 난방운전시에는 상기 실내 열교환기(1)로 이송되도록 절환되는 사방밸브(7)로 구성된다.As shown in FIG. 1, a conventional air conditioner includes an indoor heat exchanger 1 that operates as an evaporator during a cooling operation and a condenser during a heating operation, and an outdoor heat exchanger that operates as an evaporator during a heating operation during a cooling operation. Between the indoor heat exchanger 1 and the outdoor heat exchanger 3, the indoor and outdoor fans 2 and 4 installed in the indoor heat exchanger 1 and the outdoor heat exchanger 3, respectively. An expansion valve 5 for expanding the installed and transported refrigerant so that the refrigerant can be easily evaporated, a compressor 6 for sucking low-temperature low-pressure refrigerant from a heat exchanger operating as an evaporator and compressing the low-temperature refrigerant to a high-temperature high-pressure refrigerant; The high temperature and high pressure refrigerant discharged from (6) is composed of a four-way valve (7) switched to be transferred to the outdoor heat exchanger (3) during the cooling operation to the indoor heat exchanger (1) during the heating operation.
여기서, 상기 실외 열교환기(3) 등이 설치되는 실외기의 배관입구에는 각각 서비스 밸브(10a, 10b)가 설치되어 있다.Here, service valves 10a and 10b are provided at pipe inlets of the outdoor unit where the outdoor heat exchanger 3 and the like are installed.
상기에서, 냉방운전시 상기 실외 열교환기(3)는 응축기로 동작하므로 고압측이 되고, 상기 실내 열교환기(1)는 증발기로 동작하므로 저압측이 된다. 여기서, 상기 팽창밸브(5) 다음의 상기 서비스 밸브(10b)가 막혀 있는 경우에는 상기 실외 열교환기(3) 및 상기 팽창밸브(5)를 통과한 냉매가 상기 서비스 밸브(10b)에 막혀 상기 실내 열교환기(1)로 이동되지 못하게 된다. 그리고, 그 상태에서 상기 압축기(6)가 동작하게 되므로 상기 실내 열교환기(1)에서는 표준상태보다 더 낮은 저압이 걸리게 된다.In the above, during the cooling operation, the outdoor heat exchanger 3 operates as a condenser, and thus the high pressure side. The indoor heat exchanger 1 operates as an evaporator, and thus the low pressure side. Here, when the service valve (10b) next to the expansion valve (5) is blocked, the refrigerant passing through the outdoor heat exchanger (3) and the expansion valve (5) is blocked by the service valve (10b) to the room It cannot be moved to the heat exchanger 1. In this state, since the compressor 6 is operated, the indoor heat exchanger 1 receives a lower pressure lower than a standard state.
반대로, 난방운전시 상기 실내 열교환기(1)가 응축기로 동작하므로 고압측이 되고, 상기 실외 열교환기(3)는 증발기로 동작하므로 저압측이 된다. 여기서, 상기 압축기(6)와 상기 실내 열교환기(1) 사이에 설치된 상기 서비스 밸브(10a)가 막혀 있는 경우에는 상기 압축기(6)가 상기 실외 열교환기(3)로부터 냉매를 흡입하여 상기 실내 열교환기(1) 쪽으로 토출하게 되나, 상기 서비스 밸브(10a)가 막혀 있으므로 상기 실외 열교환기(3)에서는 마찬가지로 표준상태보다 더 낮은 저압이 걸리게 된다.On the contrary, since the indoor heat exchanger 1 operates as a condenser during heating operation, the indoor heat exchanger 1 becomes a high pressure side, and the outdoor heat exchanger 3 operates as an evaporator. Here, when the service valve 10a provided between the compressor 6 and the indoor heat exchanger 1 is blocked, the compressor 6 sucks refrigerant from the outdoor heat exchanger 3 to heat the indoor heat exchanger. Although discharged toward the unit 1, since the service valve 10a is blocked, the outdoor heat exchanger 3 likewise takes a lower pressure than the standard state.
물론, 상기 팽창밸브(5)가 막힌 경우에도 상기와 같은 현상이 나타나게 된다.Of course, the above phenomenon occurs even when the expansion valve 5 is blocked.
상기한 바와 같이 저압측에 표준상태보다 낮은 저압이 걸리게 되면, 상기 압축기(6) 등의 구성요소에 치명적인 손상을 초래할 수 있기 때문에 압력센서(1a, 3a)를 설치하여 저압을 감지하고 있는 실정이다.As described above, when a low pressure lower than the standard state is applied to the low pressure side, a fatal damage may be caused to the components of the compressor 6 or the like. Therefore, pressure sensors 1a and 3a are installed to sense low pressure. .
그러나, 종래의 공기조화기의 저압측 막힘 판단방법은 상기 압력센서(1a, 3a)를 설치하여 하드웨어적으로 저압측의 막힘을 판단하게 되므로 추가적인 상기 압력센서(1a, 3a)의 설치에 따라 비용이 증대되고, 상기 압축기(6)의 운전주파수가 변동되어 저압측에 걸리는 압력이 변동되는 경우 상기 압력센서(1a, 3a)가 오동작하게 되어 상기 압축기(6) 등의 부품들에 치명적인 손상을 초래하게 되는 문제점이 있다.However, in the conventional method for determining the low pressure side clogging of the air conditioner, since the pressure sensors 1a and 3a are installed to determine the blockage on the low pressure side by hardware, the cost may be increased depending on the installation of the additional pressure sensors 1a and 3a. In this case, when the operating frequency of the compressor 6 is changed and the pressure applied to the low pressure side is changed, the pressure sensors 1a and 3a malfunction, which causes fatal damage to components such as the compressor 6. There is a problem.
본 발명은 상기한 종래 기술의 문제점을 해결하기 위하여 안출된 것으로서, 응축배관온도와 그 주위공기온도의 차이인 응축온도차와 증발측 공기온도에 의해 보상된 응축온도차인 표준응축온도차를 비교하여 저압측의 막힘을 판단함으로써 별도의 압력센서 등의 부품을 절약할 수 있고 저압측의 막힘을 정확하게 판단하여 압축기 등의 부품들을 보호할 수 있는 공기조화기의 저압측 막힘 판단방법을 제공하는데 그 목적이 있다.The present invention has been made to solve the above problems of the prior art, the low pressure side by comparing the difference between the condensation piping temperature and the ambient air temperature of the condensation temperature difference and the standard condensation temperature difference compensated by the evaporation side air temperature The purpose of the present invention is to provide a low pressure side clogging determination method for an air conditioner that can save components such as a pressure sensor and to protect components such as a compressor by accurately judging blockage on the low pressure side. .
도 1은 종래기술에 의한 공기조화기의 개략적인 구성도,1 is a schematic configuration diagram of an air conditioner according to the prior art,
도 2는 본 발명에 의한 공기조화기의 개략적인 구성도,2 is a schematic configuration diagram of an air conditioner according to the present invention;
도 3은 본 발명에 의한 공기조화기의 저압측 막힘 판단방법에 관한 제어 블록도,3 is a control block diagram of a low pressure side blockage determining method of an air conditioner according to the present invention;
도 4는 본 발명에 의한 공기조화기의 저압측 막힘 판단방법에 관한 난방운전시의 순서도이다.4 is a flowchart of a heating operation of the low pressure side clogging determination method of the air conditioner according to the present invention.
<도면의 주요 부분에 관한 부호의 설명><Explanation of symbols on main parts of the drawings>
51 : 실내 열교환기 51a : 실내 열교환기 온도센서51: indoor heat exchanger 51a: indoor heat exchanger temperature sensor
51b : 실내공기 온도센서 52 : 실내 팬51b: Indoor air temperature sensor 52: Indoor fan
53 : 실외 열교환기 53a : 실외 열교환기 온도센서53: outdoor heat exchanger 53a: outdoor heat exchanger temperature sensor
53b : 실외공기 온도센서 54 : 실외 팬53b: Outdoor air temperature sensor 54: Outdoor fan
55 : 팽창밸브 56 : 압축기55 expansion valve 56 compressor
57 : 사방밸브 60 : 제어부57: four-way valve 60: control unit
70a, 70b : 서비스 밸브 80 : 표시부70a, 70b: service valve 80: display unit
본 발명은 전원이 공급되면 고압측 팬을 동작시키고 일정주파수로 압축기를 운전한 다음 응축배관온도와 그 주위의 공기온도를 감지하는 감지단계와, 상기 응축배관온도와 그 주위의 공기온도와의 차이인 응축온도차와 증발측의 공기온도에 의해 보상된 응축배관온도와 주위공기온도의 차이인 표준응축온도차를 비교하여 저압측의 막힘 여부를 판단하는 판단단계를 포함하여 구성된 것을 특징으로 한다.The present invention operates the high-pressure side fan when the power is supplied, and operating the compressor at a constant frequency, and then detecting the condensation pipe temperature and the ambient air temperature, the difference between the condensation pipe temperature and the air temperature around it And a determination step of determining whether the low pressure side is clogged by comparing the difference between the condensation temperature difference and the standard condensation temperature difference compensated by the air temperature on the evaporation side and the ambient air temperature.
여기서, 상기 판단단계는 상기 응축온도차가 상기 표준응축온도차의 일정 퍼센트 이상인 경우에는 정상으로 판단하고, 그 이하인 경우에는 저압측이 막힌 것으로 판단하는 것을 특징으로 한다.Here, the determining step is characterized in that it is determined that the normal when the condensation temperature difference is more than a certain percentage of the standard condensation temperature difference, and that the lower pressure side is blocked if less than that.
또한, 상기 판단단계는 상기 응축온도차가 상기 표준응축온도차의 상기 일정 퍼센트 이하인 경우에는 일정시간 동안 상기 압축기를 더 운전시키고, 상기 응축온도차가 상기 표준응축온도차의 일정 퍼센트 이상인 경우에는 정상으로 판단하고 그 이하인 경우에는 저압측이 막힌 것으로 판단하는 것을 특징으로 한다.In the determining step, when the condensation temperature difference is less than the predetermined percentage of the standard condensation temperature difference, the compressor is further operated for a predetermined time, and when the condensation temperature difference is more than a certain percentage of the standard condensation temperature difference, it is determined as normal. When it is below, it is determined that the low pressure side is clogged.
이하, 본 발명의 실시예를 참조된 도면을 참조하여 설명하면 다음과 같다.Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
우선 참조된 도면, 도 2는 본 발명에 의한 공기조화기의 개략적인 구성도이고, 도 3은 본 발명에 의한 공기조화기의 저압측 막힘 판단방법에 관한 제어 블록도이며, 도 4는 본 발명에 의한 공기조화기의 저압측 막힘 판단방법에 관한 난방운전시의 순서도이다.2 is a schematic configuration diagram of an air conditioner according to the present invention, FIG. 3 is a control block diagram of a low pressure side blockage determining method of an air conditioner according to the present invention, and FIG. It is a flowchart at the time of heating operation regarding the low pressure side clogging determination method of the air conditioner by
본 발명에 의한 공기조화기는 도 2 및 도 3에 도시된 바와 같이 냉방운전시에는 증발기로 난방운전시에는 응축기로 동작하는 실내 열교환기(51)와, 냉방운전시에는 응축기로 난방운전시에는 증발기로 동작하는 실외 열교환기(53)와, 상기 실내 열교환기(51) 및 상기 실외 열교환기(53)에 각각 설치된 실내외 팬(52, 54)과, 상기 실내 열교환기(51)와 상기 실외 열교환기(53) 사이에 설치되어 이송되는 냉매가 용이하게 증발될 수 있도록 팽창시키는 팽창밸브(55)와, 증발기로 동작하는 열 교환기로부터 저온저압의 냉매를 흡입하여 고온고압의 냉매로 압축시키는 압축기(56)와, 상기 압축기(56)로부터 토출되는 고온고압의 냉매를 냉방운전시에는 상기 실외 열교환기(53)로 난방운전시에는 상기 실내 열교환기(51)로 이송되도록 절환되는 사방밸브(57)로 구성된다.As shown in FIGS. 2 and 3, the air conditioner according to the present invention has an indoor heat exchanger 51 that operates as a condenser during heating operation and a condenser during heating operation, and an evaporator during heating operation as a condenser during cooling operation. An outdoor heat exchanger 53, an indoor / outdoor fan 52 and 54 installed in the indoor heat exchanger 51 and the outdoor heat exchanger 53, the indoor heat exchanger 51 and the outdoor heat exchanger, respectively. Expansion valve (55) installed between the 53 so as to expand the refrigerant to be easily evaporated, and the compressor for sucking the low-temperature low-pressure refrigerant from the heat exchanger operating as the evaporator to compress the high-temperature high-pressure refrigerant (56) ), And the four-way valve 57 is switched to be transferred to the outdoor heat exchanger (51) during the heating operation to the high temperature and high pressure refrigerant discharged from the compressor (56) during the cooling operation. It is composed.
또한, 실내외에 각각 설치된 실내외 공기온도센서(51b, 53b)와, 상기 실내외 열교환기(51, 53)에 각각 설치된 실내외 열교환기 온도센서(51a, 53a)와, 상기 실외 열교환기(53)가 설치된 실외기의 입구배관에 각각 설치된 제 1, 2서비스 밸브(70a, 70b)와, 상기한 온도센서(51a, 51b, 53a, 53b)들로부터 신호를 입력받아 저압측의 막힘 여부를 판단하는 제어부(60)로 구성된다.In addition, indoor and outdoor air temperature sensors 51b and 53b respectively installed inside and outside, indoor and outdoor heat exchanger temperature sensors 51a and 53a respectively installed in the indoor and outdoor heat exchangers 51 and 53, and the outdoor heat exchanger 53 are installed. Control unit 60 for determining whether the low-pressure side blockage by receiving a signal from the first and second service valves (70a, 70b) and the temperature sensors (51a, 51b, 53a, 53b) respectively installed in the inlet pipe of the outdoor unit It consists of
상기와 같이 구성된 본 발명에 의한 공기조화기에서 저압측 막힘 판단 방법을 설명하면 다음과 같다.Referring to the low pressure side clogging determination method in the air conditioner according to the present invention configured as described above are as follows.
먼저, 난방운전시 전원이 공급되면 상기 제어부(60)가 상기 실내 팬(52)을 동작시키는 동시에 상기 압축기(56)를 일정시간 동안 일정주파수로 운전시킨 다음, 상기 실내 열교환기 온도센서(51a)로부터 응축배관온도를 입력받고 상기 실내공기 온도센서(51b)로부터 실내공기의 온도를 입력받아 그 온도들의 차이값인 응축온도차를 연산한다. 그 다음, 실외공기온도에 의해 보상된 기준치인 응축배관온도와 그 주위공기온도의 차이값인 표준응축온도차를 연산하여 상기 응축온도차와 비교한다. 즉, 상기 응축온도차가 상기 표준응축온도차의 80% 이상인 경우에는 상기 서비스 밸브(70a, 70b)가 막히지 않은 것으로 판단하여 정상운전을 개시하고, 상기 응축온도차가 상기 표준응축온도차의 80% 이하인 경우에는 상기 압축기(56)를 제한시간에 이르기까지 계속 운전하면서 상기 응축온도차와 상기 표준응축온도차를 비교하게 된다. 그 후, 제한시간이 경과한 다음 상기 응축온도차가 상기 표준응축온도차의 25% 이상인 경우에는 저압측이 막히지 않은 것으로 판단하고, 25% 이하인 경우에는 상기 서비스 밸브(70a, 70b)가 막혀 저압측이 막힌 것으로 판단하여 상기 표시부(80)를 통하여 저압측이 막혔음을 표시하고 동작을 중지한다. 물론, 상기 팽창밸브(55)가 막힌 경우에도 상기와 같이 표시히게 된다.First, when power is supplied during a heating operation, the controller 60 operates the indoor fan 52 and simultaneously operates the compressor 56 at a constant frequency for a predetermined time, and then the indoor heat exchanger temperature sensor 51a. The condensation pipe temperature is input from the indoor air temperature sensor 51b, and the indoor air temperature is input from the condensation temperature difference, which is a difference between the temperatures. Next, a standard condensation temperature difference, which is a difference value between the condensation pipe temperature, which is a reference value compensated by the outdoor air temperature, and the ambient air temperature, is calculated and compared with the condensation temperature difference. That is, when the condensation temperature difference is 80% or more of the standard condensation temperature difference, it is determined that the service valves 70a and 70b are not blocked, and the normal operation is started. When the condensation temperature difference is 80% or less of the standard condensation temperature difference, The condenser temperature difference is compared with the standard condensation temperature difference while the compressor 56 continues to operate until the time limit. After that, when the condensation temperature difference is 25% or more of the standard condensation temperature difference, the low pressure side is not blocked, and when it is 25% or less, the service valves 70a and 70b are blocked and the low pressure side is blocked. It is determined that it is blocked, and indicates that the low pressure side is blocked through the display unit 80, and the operation is stopped. Of course, even if the expansion valve 55 is blocked is displayed as described above.
그리고, 냉방운전시 전원이 공급되면 상기 실외 팬(54)을 동작시키는 동시에 상기 압축기(56)를 일정시간 동안 일정 주파수로 운전시킨 다음, 상기 실외 열교환기 온도센서(53a)로부터 응축배관온도를 입력받고 상기 실외공기 온도센서(53b)로부터 실외공기의 온도를 입력받아 그 온도의 차이값인 응축온도차를 연산하고, 그 다음, 실외공기의 온도에 의해 보상된 기준치인 응축배관온도와 그 주위공기의 온도의 차이값인 표준응축온도차를 연산하여 상기 응축온도차와 비교한다. 즉, 상기 응축온도차가 상기 표준응축온도차의 80% 이상인 경우에는 상기 팽창밸브(55)가 막히지 않은 것으로 판단하여 정상운전을 개시하고, 상기 응축온도차가 상기 표준응축온도차의 80% 이하인 경우에는 상기 압축기(56)를 제한시간에 이르기까지 계속 운전하면서 상기 응축온도차와 상기 표준응축온도차를 비교하게 된다. 그 후, 제한시간이 경과한 다음 상기 응축온도차가 상기 표준응축온도차의 25% 이상인 경우에는 저압측이 막히지 않은 것으로 판단하고, 25% 이하인 경우에는 상기 팽창밸브(55)가 막혀 저압측이 막힌 것으로 판단하여 상기 표시부(80)를 통하여 저압측이 막혔음을 표시하고 동작을 중지한다. 물론, 상기 서비스 밸브(70a, 70b)가 막힌 경우에도 상기와 같이 표시하게 된다.When the power is supplied during the cooling operation, the outdoor fan 54 is operated and the compressor 56 is operated at a predetermined frequency for a predetermined time, and then the condensation pipe temperature is input from the outdoor heat exchanger temperature sensor 53a. Receiving the temperature of the outdoor air from the outdoor air temperature sensor 53b and calculating the difference in the condensation temperature, which is a difference value of the temperature, and then calculating the condensation pipe temperature and the ambient air, which is a reference value compensated by the temperature of the outdoor air. The standard condensation temperature difference, which is a difference value of temperature, is calculated and compared with the condensation temperature difference. That is, when the condensation temperature difference is 80% or more of the standard condensation temperature difference, it is determined that the expansion valve 55 is not blocked and normal operation is started. When the condensation temperature difference is 80% or less of the standard condensation temperature difference, the compressor The condensation temperature difference and the standard condensation temperature difference are compared while the operation of 56 continues to the time limit. After that, when the condensation temperature difference is more than 25% of the standard condensation temperature difference, it is determined that the low pressure side is not blocked, and when it is 25% or less, the expansion valve 55 is blocked and the low pressure side is blocked. By judging, the low pressure side is blocked through the display unit 80 and the operation is stopped. Of course, even if the service valve (70a, 70b) is clogged as shown above.
한편, 상기 사방밸브(57) 절환이 제대로 이루어지지 않은 경우에도 상기와 같은 방법으로 막힘 여부를 판단할 수 있다.On the other hand, even if the four-way valve 57 is not properly switched can be determined whether or not clogged in the same way as described above.
아래의 식은 각각의 조건에 따라 확인된 실험 값이다.The following equations are experimental values confirmed under each condition.
전원전압Power supply voltage AC 178VAC 178 V AC 220VAC 220V AC 250VAC 250V
냉방정상상태Cooling steady state 1분22초후 정상판정Normal judgment after 1 minute 22 seconds 1분22초후 정상판정Normal judgment after 1 minute 22 seconds 1분22초후 정상판정Normal judgment after 1 minute 22 seconds
냉방막힘상태Cooling blocked state 3분3초후 막힘판정Blockage judgment after 3 minutes and 3 seconds 1분48초부터 3분2초후 막힘판정Blockage judged after 1 minute 48 seconds and 3 minutes 2 seconds 2분46초후 막힘판정Blockage judgment after 2 minutes and 46 seconds
난방정상상태Normal heating state 1분22초후 정상판정Normal judgment after 1 minute 22 seconds 1분45초부터 2분13초후 정상판정Normal judgment from 1 minute 45 seconds to 2 minutes 13 seconds 1분39초후 정상판정Normal judgment after 1 minute 39 seconds
난방막힘상태Heating blocked state 3분3초후 막힘판정Blockage judgment after 3 minutes and 3 seconds 3분3초후 막힘판정Blockage judgment after 3 minutes and 3 seconds 3분3초후 막힘판정Blockage judgment after 3 minutes and 3 seconds
이와 같이, 본 발명에 의한 공기조화기의 저압측 막힘 판단방법은 상기 응축온도차와 표준응축온도차를 비교하여 저압측의 막힘 여부를 판단하게 되므로 별도의 압력센서와 같은 부품이 절약되고, 정상운전 전에 저압측의 막힘 여부를 판단하게 되므로 저압측이 막혀서 발생될 수 있는 상기 압축기(56) 등의 구성요소의 손상을 미연에 방지할 수 있는 효과를 제공한다.As described above, the method for determining the low pressure side clogging of the air conditioner according to the present invention compares the difference between the condensation temperature and the standard condensation temperature and determines whether the low pressure side is blocked, thereby saving components such as a separate pressure sensor. Since it is determined whether the low pressure side is blocked, it provides an effect of preventing damage to components such as the compressor 56, which may be generated due to the low pressure side being blocked.

Claims (1)

  1. 전원이 공급되면 고압측 팬을 동작시키고 일정주파수로 압축기를 운전한 다음 응축배관온도와 그 주위의 공기온도를 감지하는 감지단계와, 상기 응축배관온도와 그 주위의 공기온도와의 차이인 응축온도차와 증발측의 공기온도에 의해 보상된 응축배관온도와 주위공기온도의 차이인 표준응축온도차를 비교하여 저압측의 막힘 여부를 판단하는 판단단계를 포함하여 구성된 것을 특징으로 하는 공기조화기의 저압측 막힘 판단방법.When the power is supplied, the high pressure side fan is operated and the compressor is operated at a constant frequency, and then a sensing step of detecting the condensation pipe temperature and the ambient air temperature, and a condensation temperature difference that is a difference between the condensation pipe temperature and the ambient air temperature And a judgment step of determining whether the low pressure side is clogged by comparing a standard condensation temperature difference, which is a difference between the condensation pipe temperature compensated by the air temperature on the evaporation side and the ambient air temperature, to the low pressure side of the air conditioner. How to determine blockage.
KR1019990016071A 1999-05-04 1999-05-04 Low pressure side obstruction deciding method for air conditioner KR20000073050A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140018782A (en) * 2012-07-03 2014-02-13 삼성전자주식회사 Diagnosis method of air conditioner
CN109827303A (en) * 2019-03-01 2019-05-31 奥克斯空调股份有限公司 A kind of temperature control method, device and server
CN110260460A (en) * 2019-05-10 2019-09-20 珠海格力电器股份有限公司 Control method, device, equipment and the apparatus of air conditioning of coolant circulating system
US10837872B2 (en) 2012-07-03 2020-11-17 Samsung Electronics Co., Ltd. Diagnosis control method of air conditioner

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20140018782A (en) * 2012-07-03 2014-02-13 삼성전자주식회사 Diagnosis method of air conditioner
US10837872B2 (en) 2012-07-03 2020-11-17 Samsung Electronics Co., Ltd. Diagnosis control method of air conditioner
US11099106B2 (en) 2012-07-03 2021-08-24 Samsung Electronics Co., Ltd. Diagnosis control method of air conditioner
CN109827303A (en) * 2019-03-01 2019-05-31 奥克斯空调股份有限公司 A kind of temperature control method, device and server
CN110260460A (en) * 2019-05-10 2019-09-20 珠海格力电器股份有限公司 Control method, device, equipment and the apparatus of air conditioning of coolant circulating system

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