KR20010069120A - Method for starting an electronic expansion valve of a cooling apparatus - Google Patents

Method for starting an electronic expansion valve of a cooling apparatus Download PDF

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Publication number
KR20010069120A
KR20010069120A KR1020000001382A KR20000001382A KR20010069120A KR 20010069120 A KR20010069120 A KR 20010069120A KR 1020000001382 A KR1020000001382 A KR 1020000001382A KR 20000001382 A KR20000001382 A KR 20000001382A KR 20010069120 A KR20010069120 A KR 20010069120A
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South Korea
Prior art keywords
compressor
temperature
expansion valve
air conditioner
opening degree
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KR1020000001382A
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Korean (ko)
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KR100399318B1 (en
Inventor
염관호
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구자홍
엘지전자 주식회사
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Priority to KR10-2000-0001382A priority Critical patent/KR100399318B1/en
Publication of KR20010069120A publication Critical patent/KR20010069120A/en
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Publication of KR100399318B1 publication Critical patent/KR100399318B1/en

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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
    • F24F11/49—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring ensuring correct operation, e.g. by trial operation or configuration checks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • 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
    • F25B2600/2513—Expansion 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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/022—Compressor control arrangements

Abstract

PURPOSE: An expansion solenoid valve driving method of an air conditioner is provided to reduce operating time, and to improve the stability of the air conditioner cycle by setting the opening degree of a solenoid valve. CONSTITUTION: An outdoor temperature loading state is checked based on difference between the refrigerant discharge temperature of a compressor and the temperature of a condenser in starting the compressor. The initial opening degree of an expansion solenoid valve is set according to outdoor temperature load. The compressor is operated with loading the normal opening degree in case of the temperature difference to be more than 10deg.C, by adding 20 to the normal opening degree in case of the temperature difference to be within the range of 5-10deg.C, and by adding 40 to the normal opening degree in case of the temperature difference to be less than 5deg.C. The pressure lowering in an inlet of the compressor is prevented, and stability is improved in injecting liquid refrigerant to the compressor and at initial cycle.

Description

냉방기의 전자 팽창 밸브 기동방법{Method for starting an electronic expansion valve of a cooling apparatus}Method for starting an electronic expansion valve of a cooling apparatus}

본 발명은 냉방기의 전자 팽창 밸브 기동방법에 관한 것으로서, 더 상세히는 전자 팽창 밸브를 사용하는 인버터 에어컨의 초기 기동시의 전자 팽창 밸브의 개도를 설정함에 있어서, 압축기 기동전에 압축기 출구 과열도를 보고 판단하여 전자 팽창 밸브의 개도를 설정함으로써, 에어컨 사이클을 안정화시키는데 걸리는 시간을 줄이고, 에어컨 사이클의 불안정을 방지할 수 있는 냉방기의 전자 팽창 밸브 기동방법에 관한 것이다.The present invention relates to a method for starting an electronic expansion valve of a cooler, and more particularly, in setting an opening degree of an electronic expansion valve at the initial startup of an inverter air conditioner using an electronic expansion valve, the compressor outlet superheat degree is determined before the compressor starts. By setting the opening degree of the electromagnetic expansion valve, the time required for stabilizing the air conditioning cycle, and relates to a method for starting the electronic expansion valve of the air conditioner which can prevent the instability of the air conditioning cycle.

도 1은 일반적인 에어컨의 전체 사이클을 보여주는 블럭도이다.1 is a block diagram showing an entire cycle of a general air conditioner.

도 1을 참조하면, 에어컨은 일반적으로 압축기(1), 응축기(실내 열교환기) (2), 리시버(3), 전자 팽창 밸브(4), 및 증발기(실외 열교환기)(5)로 구성된다.Referring to FIG. 1, an air conditioner generally consists of a compressor 1, a condenser (indoor heat exchanger) 2, a receiver 3, an electronic expansion valve 4, and an evaporator (outdoor heat exchanger) 5. .

이와 같이 구성된 에어컨의 동작을 살펴보면, 에어컨이 운전된 후, 초기에는 압축기(1)에서 토출된 냉매가 응축기(실내 열교환기)(2)를 통해 열교환을 한 후 리시버(3)를 거쳐 실외기에 있는 전자 팽창 밸브(4)를 통과한다. 그리고, 전자 팽창 밸브(4)를 통과한 냉매는 증발기(실외 열교환기)(5)에서 열교환되고 열교환된 냉매는 실외기의 압축기(1)로 들어간다.Referring to the operation of the air conditioner configured as described above, after the air conditioner is operated, the refrigerant discharged from the compressor 1 initially exchanges heat through the condenser (indoor heat exchanger) 2 and then passes through the receiver 3 to the outdoor unit. Pass the electromagnetic expansion valve (4). Then, the refrigerant passing through the electromagnetic expansion valve 4 is heat exchanged in the evaporator (outdoor heat exchanger) 5 and the heat exchanged refrigerant enters the compressor 1 of the outdoor unit.

이러한 과정을 반복함으로써 실내온도 조건이 조절되는데, 실내 온도조건을 맞추기 위해서는 압축기(1)의 주파수를 변경하고, 그 변경된 압축기(1)의 주파수에 맞게 전자 팽창 밸브(4)의 개도를 조절하는 한편 각 시점에서 그 때의 부하상태에맞는 개도를 조절해서 사이클이 빠른 시간에 안정을 찾아갈 수 있도록 제어하고 있다. 즉, 에어컨을 운전한 후에는 운전상황 및 부하상황에 맞게 개도를 조절하여 에어컨의 사이클을 안정화시켜 나가고 있다.By repeating this process, the room temperature condition is adjusted. In order to meet the room temperature condition, the frequency of the compressor 1 is changed, and the opening degree of the electromagnetic expansion valve 4 is adjusted according to the changed frequency of the compressor 1. At each time point, the opening degree is adjusted according to the load state so that the cycle can be stabilized at a quick time. In other words, after driving the air conditioner by adjusting the opening degree according to the operating conditions and load conditions to stabilize the cycle of the air conditioner.

일반적으로, 전자 팽창 밸브를 사용하는 인버터 에어컨에 있어서는 에어컨의 운전 초기에 에어컨의 부하 상태를 고려하지 않고 일정한 개도를 연 상태에서 에어컨의 압축기를 운전시켰다. 즉, 겨울에 실외온도가 영하의 추운 상태에서(부하가 큰 경우) 압축기를 운전 시켜야 할 경우가 있다.In general, in the inverter air conditioner using the electromagnetic expansion valve, the compressor of the air conditioner was operated at a constant opening degree without considering the load condition of the air conditioner at the beginning of the air conditioner operation. In other words, the compressor may need to be operated in the winter when the outdoor temperature is below zero (high load).

이때, 압축기가 OFF된 후 얼마의 시간이 흘렀는지 알 수 없는 경우에 압축기가 오랜 동안(10분이상) OFF되어 있었던 경우에는 압축기의 온도와 응축기 온도가 거의 같다. 그리고, 압축기가 OFF된 후 약간의 시간(약 5분-10분)이 흐른 경우에는 압축기의 온도와 응축기 온도의 차가 약간 있다. 또한, 압축기가 OFF된 후 얼마 안된 경우(약 4분 이내)에는 압축기의 온도와 응축기 온도의 차가 크다.At this time, when the compressor has been turned off for a long time (10 minutes or more) when it is not known how much time has passed since the compressor is turned off, the temperature of the compressor and the condenser temperature are almost the same. Then, if some time (about 5 minutes-10 minutes) has passed since the compressor was turned off, there is a slight difference between the temperature of the compressor and the condenser temperature. In addition, when the compressor is shortly turned off (within about 4 minutes), the difference between the compressor temperature and the condenser temperature is large.

이상과 같은 온도 차는 실외온도 부하가 적은 경우에는 특별히 문제가 없지만 실외온도 부하가 큰 경우에는 압축기로의 액 냉매의 유입문제나, 사이클이 안정되는데 시간이 걸리는 문제가 있다.The above temperature difference does not have a problem especially when the outdoor temperature load is small, but when the outdoor temperature load is large, there is a problem of inflow of liquid refrigerant into the compressor or a problem that takes time to stabilize the cycle.

따라서, 종래의 기술은 이러한 여러 가지 환경에 대해서 초기개도를 설정하는데 문제가 있었다.Therefore, the prior art has a problem in setting the initial opening degree for these various environments.

도 2는 실외온도부하가 큰 경우 시간에 따른 에어컨의 압축기 출구압력(Pd)과 입구압력(Ps)의 변화를 실험한 데이터를 나타낸 그래프이다.FIG. 2 is a graph illustrating data experiments of changes in the compressor outlet pressure Pd and the inlet pressure Ps of the air conditioner with time when the outdoor temperature load is large.

도 2에 도시된 바와 같이, 압축기 입구 압력(Ps)이 상당히 낮아짐을 알 수있고 또한 초기에 사이클이 불안정함을 알 수 있다.As shown in FIG. 2, it can be seen that the compressor inlet pressure Ps is significantly lowered and also that the cycle is initially unstable.

종래의 전자 팽창 밸브를 사용하는 인버터 에어컨에 있어서는 에어컨의 운전 초기에 에어컨의 부하 상태를 고려하지 않고 일정한 개도 상태에서 에어컨의 압축기를 운전시켰다. 이때, 실외온도 부하가 적은 경우에는 특별히 문제가 없지만 실외온도 부하가 큰 경우에는 압축기로의 액 냉매의 유입문제나, 사이클이 안정되는데 시간이 걸리는 문제가 있다.In the inverter air conditioner using the conventional solenoid expansion valve, the compressor of the air conditioner was operated in a constant opening state without considering the load condition of the air conditioner at the beginning of the air conditioner operation. At this time, when the outdoor temperature load is small, there is no particular problem, but when the outdoor temperature load is large, there is a problem of inflow of liquid refrigerant into the compressor and a problem in that the cycle takes time to stabilize.

즉, 압축기가 오랜 동안 OFF되어 방치되어 있었던 경우, 압축기의 온도와 실외온도가 거의 같아진다. 이때, 적절치 않은 개도 상태에서 압축기를 운전하면, 압축기 입구의 압력이 저하되어 압축기입구가 진공상태가 되어 압축기로 액상태의 냉매가 들어갈 수 있다.That is, when the compressor has been turned off for a long time, the temperature of the compressor and the outdoor temperature are almost the same. At this time, if the compressor is operated in an unsuitable opening state, the pressure at the compressor inlet is lowered, and the compressor inlet becomes a vacuum state, and liquid refrigerant can enter the compressor.

또한, 실외 열교환기에 모여 있던 냉매가 실외온도가 극히 낮은 외부와 열교환을 하기 위해서 더 많은 열량이 필요하게 되어 실외 열교환기의 온도가 더 떨어져야 한다. 결국 압축기 입구의 압력이 떨어지고 사이클이 안정하게 되는데 시간이 걸리게 된다. 종래의 기술은 이러한 안 좋은 환경에 대해서 초기 전자 팽창 밸브의 개도를 설정하는데 문제가 있었다.In addition, since the refrigerant gathered in the outdoor heat exchanger needs more heat to exchange heat with the outside of which the outdoor temperature is extremely low, the temperature of the outdoor heat exchanger should be further lowered. As a result, the pressure at the compressor inlet drops and the cycle takes time to stabilize. The prior art has had a problem setting the opening degree of the initial electromagnetic expansion valve for this unfavorable environment.

본 발명은 상기와 같은 문제점들을 해결하기 위하여 창출된 것으로서, 전자 팽창 밸브를 사용하는 냉방기에서 압축기를 처음 운전시키는지 아니면 운전된 후 OFF 상태에서 다시 기동시키는가를 압축기 기동전에 판단하여 전자 팽창 밸브의 개도를 설정함으로써, 에어컨 사이클을 안정화시키는데 걸리는 시간을 줄이고, 에어컨 사이클의 불안정을 방지할 수 있는 냉방기의 전자 팽창 밸브 기동방법을 제공함에 그 목적이 있다.The present invention has been made to solve the above problems, and it is determined whether to start the compressor in the air conditioner using the electronic expansion valve for the first time or to start it again in the OFF state after the operation, before opening the compressor. It is an object of the present invention to provide a method for starting an electronic expansion valve of a cooler capable of reducing the time taken to stabilize an air conditioner cycle and preventing instability of the air conditioner cycle.

도 1은 일반적인 에어컨의 전체 사이클을 보여주는 블록도.1 is a block diagram showing the entire cycle of a typical air conditioner.

도 2는 실외온도부하가 큰 경우 시간에 따른 에어컨의 압축기 출구압력(Pd)과 압축기 입구압력(Ps)의 변화를 실험한 데이터를 나타낸 그래프.2 is a graph illustrating data experiments of changes in the compressor outlet pressure Pd and the compressor inlet pressure Ps of the air conditioner with time when the outdoor temperature load is large.

도 3은 본 발명에 따른 냉방기의 전자 팽창 밸브 기동방법의 실행 과정을 나타낸 흐름도.Figure 3 is a flow chart showing the execution process of the electromagnetic expansion valve starting method of the air conditioner according to the present invention.

도 4는 본 발명에 따른 냉방기의 전자 팽창 밸브 기동방법에 의한 냉방기의 기동 시의 압축기의 온도와 응축기의 온도 차에 따른 초기개도를 찾는 그래프.4 is a graph for finding an initial opening degree according to the temperature difference between the temperature of the compressor and the condenser at the start of the air conditioner by the electronic expansion valve start method of the air conditioner according to the present invention.

도 5는 본 발명에 따른 냉방기의 전자 팽창 밸브 기동방법이 채용된 냉방기의 기동 시의 실외온도 부하가 큰 경우의 압축기의 입구측 압력(Ps)과 출구측 압력 (Pd)의 변화를 보여주는 그래프.Fig. 5 is a graph showing a change in the inlet pressure Ps and the outlet pressure Pd of the compressor when the outdoor temperature load at the start of the air conditioner when the electromagnetic expansion valve starting method of the air conditioner is employed is large.

<도면의 주요 부분에 대한 부호의 설명〉<Explanation of symbols for main parts of the drawings>

1 : 압축기 1a : 토출 온도센서1: Compressor 1a: Discharge Temperature Sensor

2 : 응축기(실내 열교환기) 2a : 실외 온도센서2: condenser (indoor heat exchanger) 2a: outdoor temperature sensor

3 : 리시버(水液器) 4 : 전자 팽창 밸브3: receiver 4: electromagnetic expansion valve

5 : 증발기(실외 열교환기)5: evaporator (outdoor heat exchanger)

상기의 목적을 달성하기 위하여 본 발명에 따른 냉방기의 전자 팽창 밸브 기동방법은, 전자 팽창 밸브를 사용하는 냉방기에서 압축기의 초기 기동시에, 상기 압축기의 냉매 토출온도와 응축기의 온도차에 의거하여 실외 온도 부하상태를 판단하고, 상기 전자 팽창 밸브의 초기 개도를 그 실외 온도 부하에 따라 별도로 설정하여 상기 압축기를 운전시키는 것을 특징으로 한다.In order to achieve the above object, the electromagnetic expansion valve starting method of the air conditioner according to the present invention is an outdoor temperature load based on a temperature difference between the refrigerant discharge temperature of the compressor and the temperature of the condenser at the initial startup of the compressor in the air conditioner using the electromagnetic expansion valve. The state is determined, and the initial opening of the electromagnetic expansion valve is set separately according to the outdoor temperature load to drive the compressor.

그 바람직한 냉방기의 전자 팽창 밸브 초기 기동방법은, 압축기의 토출온도 및 응축기의 응축온도를 읽어들여 그 온도차를 구하는 제 1 단계; 상기 온도차에 의해 압축기의 off 된후 경과시간을 판단하고 그 경과시간에 따라 전자 팽창 밸브의 초기 개도를 조절하여 압축기를 운전시키는 제 2 단계를 수행한다.The preferred method for starting the electronic expansion valve of the air conditioner includes: a first step of reading the discharge temperature of the compressor and the condensation temperature of the condenser and obtaining the temperature difference; The second step of determining the elapsed time after the compressor is turned off by the temperature difference and adjusting the initial opening of the electromagnetic expansion valve according to the elapsed time is performed to operate the compressor.

여기서, 상기 제 2 단계는, 상기 온도차가 10도 이상이면 정상 설정개도를 로딩(loading)하고, 상기 온도차가 5 - 10도이면 정상 설정개도 +20을 로딩하고, 상기 온도차가 5도 이하이면 정상 설정개도 +40을 로딩한다.Here, in the second step, the normal setting opening degree is loaded when the temperature difference is 10 degrees or more, the normal setting opening degree +20 is loaded when the temperature difference is 5-10 degrees, and normal when the temperature difference is 5 degrees or less. The set load also loads +40.

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

도 3은 본 발명에 따른 냉방기의 전자 팽창 밸브 기동방법의 실행 과정을 나타낸 흐름도이다.3 is a flowchart illustrating an execution process of an electronic expansion valve starting method of a cooler according to the present invention.

도 3을 참조하면, 본 발명에 따른 냉방기의 전자 팽창 밸브 기동방법은 우선, 압축기(1) 출구측에 있는 압축기 토출 온도센서(1a)에서 압축기의 토출온도(A)를 읽어 들인다(단계 11). 그리고, 응축기(2)에 있는 응축온도 센서(2a)를 통해 응축온도(B)를 읽어 들인다(단계 12). 그런 후, 그 읽어 들인 압축기(1)의 토출온도와 응축기(2)의 온도의 차(dT=A-B)를 구한다(단계 13). 이렇게 구한 온도차 dT를 가지고 압축기가 OFF된 후 어느 정도의 시간이 흘렀는지 판단한다.Referring to FIG. 3, in the method of starting the electromagnetic expansion valve of the air conditioner according to the present invention, first, the discharge temperature A of the compressor is read from the compressor discharge temperature sensor 1a on the outlet side of the compressor 1 (step 11). . Then, the condensation temperature B is read through the condensation temperature sensor 2a in the condenser 2 (step 12). Then, the difference (dT = A-B) between the discharge temperature of the read compressor 1 and the temperature of the condenser 2 is obtained (step 13). With this temperature difference dT, it is determined how much time has passed since the compressor was turned off.

즉, 온도차 dT가 10도를 초과하는지를 판단하여(단계 14), 10도를 초과하면압축기가 OFF된지 얼마 안 된 상황(약 4 - 5분 이내)으로 판단한다. 이 경우 실외온도부하가 작은 것으로 판단하여 전자 팽창 밸브(4)의 정상적인 경우의 초기개도인 "정상개도(Po)"를 설정개도로 취한다(단계 16).That is, it is determined whether the temperature difference dT exceeds 10 degrees (step 14), and when it exceeds 10 degrees, it is determined that the compressor is turned off (less than about 4-5 minutes). In this case, it is determined that the outdoor temperature load is small, and the normal opening degree Po, which is the initial opening degree in the normal case of the electromagnetic expansion valve 4, is taken as the set opening degree (step 16).

한편, 상기 단계 14에서 온도차 dT가 10도를 초과하지 않으면, 온도차 dT가 5도를 초과하는지 판단하여(단계 15), 5도를 초과하면, 즉 온도차 dT가 5 - 10도 사이이면, 압축기(1)가 OFF된 후 약간의 시간(약 5분 - 10분 이내)이 경과한 것으로 판단한다. 이 경우에는 실외 온도부하가 작은 것으로 판단하여 전자 팽창 밸브 (4)의 초기개도로서 "정상개도+20"을 설정개도로 취한다(단계 17).On the other hand, if the temperature difference dT does not exceed 10 degrees in step 14, it is determined whether the temperature difference dT exceeds 5 degrees (step 15), and if it exceeds 5 degrees, that is, if the temperature difference dT is between 5-10 degrees, the compressor ( After 1) is turned off, some time (about 5 to 10 minutes) has passed. In this case, it is determined that the outdoor temperature load is small and " normal opening degree + 20 " is taken as the initial opening degree of the electromagnetic expansion valve 4 (step 17).

한편, 상기 단계 15에서 온도차 dT가 5도를 초과하지 않으면 즉, 5도 이하이면, 압축기가 OFF된 후 오랫동안(약 10분 이상)방치된 것으로 판단한다. 이 경우에는 실외온도 부하가 큰 것으로 판단하여 전자 팽창 밸브(4)의 초기개도로서 "정상개도+40"을 설정개도로 취한다(단계 18).On the other hand, if the temperature difference dT in step 15 does not exceed 5 degrees, that is, 5 degrees or less, it is determined that the compressor is left for a long time (about 10 minutes or more) after the compressor is turned off. In this case, it is determined that the outdoor temperature load is large and " normal opening + 40 " is taken as the initial opening of the electromagnetic expansion valve 4 (step 18).

이렇게 하여 각각의 상황에 따라 전자 팽창 밸브(4)의 초기개도가 설정되면, 그 설정된 개도대로 전자 팽창 밸브(4)를 열어준다(단계 19). 그리고, 압축기 운전 명령의 하달 여부를 판단한다(단계 20). 이 단계 20의 판단에서, 압축기 운전명령이 하달되지 않았으면, 계속하여 명령 하달을 확인하고, 명령이 하달되었으면 압축기(1)의 운전을 실행한다(단계 21).In this way, when the initial opening degree of the electromagnetic expansion valve 4 is set according to each situation, the electromagnetic expansion valve 4 is opened according to the set opening degree (step 19). Then, it is determined whether or not the compressor operation command is issued (step 20). In the judgment of this step 20, if the compressor operation command has not been issued, the command is continuously confirmed, and if the command has been issued, the operation of the compressor 1 is executed (step 21).

도 4는 본 발명에 따른 냉방기의 전자 팽창 밸브 기동방법에 의한 냉방기의 기동 시의 압축기의 온도와 응축기의 온도 차에 따른 초기개도를 찾는 그래프이다.4 is a graph for finding an initial opening degree according to the temperature difference between the temperature of the compressor and the temperature of the condenser at the start of the air conditioner by the electronic expansion valve start method of the air conditioner according to the present invention.

도 4를 참조하면, 압축기 토출온도와 응축기 온도차가 10도 이상이면 초기개도로서 "정상개도"를 로딩(loading)하게 된다. 그리고, 압축기 토출온도와 응축기 온도차가 5도 - 10도 사이이면 "정상개도+20"을 로딩하고, 압축기 토출온도와 응축기 온도차가 5도 이하이면 "정상개도+40"을 로딩하게 된다.Referring to FIG. 4, when the difference between the compressor discharge temperature and the condenser temperature is 10 degrees or more, the “normal opening degree” is loaded as the initial opening degree. When the compressor discharge temperature and the condenser temperature difference are between 5 degrees and 10 degrees, the "normal opening degree +20" is loaded. When the compressor discharge temperature and the condenser temperature difference is 5 degrees or less, the "normal opening degree +40" is loaded.

도 5는 본 발명에 따른 냉방기의 전자 팽창 밸브 기동방법이 채용된 냉방기의 기동 시의 실외온도 부하가 큰 경우의 압축기의 입구측 압력(Ps)과 출구측 압력 (Pd)의 변화를 보여주는 그래프이다.FIG. 5 is a graph showing changes in the inlet pressure Ps and the outlet pressure Pd of the compressor when the outdoor temperature load at the time of starting the air conditioner when the electromagnetic expansion valve starting method of the air conditioner is employed is large. .

도 5에 도시된 바와 같이, 본 발명의 방법에 의한 압축기 입구측의 압력(Ps)의 저하가 종래의 방법보다 적게 감소되는 것을 알 수 있다. 또한, 사이클도 짧은 시간 내에 안정됨을 알 수 있다.As shown in Fig. 5, it can be seen that the decrease of the pressure Ps at the compressor inlet side by the method of the present invention is reduced less than the conventional method. It can also be seen that the cycle is also stable within a short time.

이상의 실시예에서는 에어컨의 경우를 설명하였으나, 본 발명은 이에 한정되지 않고 전자 팽창 밸브 인버터 압축기를 사용하는 다른 냉각장치(냉장고 등)에도 적용될 수 있음은 자명한 일이라 할 것이다.In the above embodiment, the case of the air conditioner has been described, but the present invention is not limited thereto, and it will be apparent that the present invention can be applied to other cooling apparatuses (such as refrigerators) using an electromagnetic expansion valve inverter compressor.

이상의 설명에서와 같이, 본 발명에 따른 냉방기의 전자 팽창 밸브 기동방법에 의하면, 전자 팽창 밸브를 사용하는 인버터 에어컨의 압축기를 운전함에 있어서운전을 개시하기 전에 압축기 토출온도와 응축기 온도와의 차를 가지고 실외 온도 부하상태를 판단하여 전자 팽창 밸브의 초기개도를 부하에 따라 설정함으로써, 압축기 입구의 극심한 압력 저하를 방지할 수 있고, 압축기로의 액 냉매 유입과 초기 사이클의 불안정한 현상을 해결할 수 있다.As described above, according to the method for starting the electromagnetic expansion valve of the air conditioner according to the present invention, in operating the compressor of the inverter air conditioner using the electromagnetic expansion valve, the compressor discharge temperature and the condenser temperature before starting operation have a difference. By determining the outdoor temperature load condition and setting the initial opening of the electromagnetic expansion valve according to the load, it is possible to prevent the extreme pressure drop at the compressor inlet, and to solve the inflow of the liquid refrigerant into the compressor and the unstable phenomenon of the initial cycle.

Claims (3)

전자 팽창 밸브를 사용하는 냉방기에서 압축기의 초기 기동시에, 상기 압축기의 냉매 토출온도와 응축기의 온도차에 의거하여 실외 온도 부하상태를 판단하고, 상기 전자 팽창 밸브의 초기 개도를 그 실외 온도 부하에 따라 별도로 설정하여 상기 압축기를 운전시키는 것을 특징으로 하는 냉방기의 전자 팽창 밸브 기동방법.In an air conditioner using an electromagnetic expansion valve, the initial temperature of the compressor is determined based on the difference between the refrigerant discharge temperature of the compressor and the temperature difference between the condenser and the initial opening of the electronic expansion valve according to the outdoor temperature load. And operating the compressor by setting the electromagnetic expansion valve of the air conditioner. 제 1항에 있어서, 상기 냉방기의 전자 팽창 밸브 초기 기동방법은,According to claim 1, The initial expansion method of the electromagnetic expansion valve of the air conditioner, 압축기의 토출온도 및 응축기의 응축온도를 읽어들여 그 온도차를 구하는 제 1단계;A first step of reading the discharge temperature of the compressor and the condensation temperature of the condenser and obtaining the temperature difference; 상기 온도차에 의해 압축기의 off된 후 경과 시간을 판단하고, 그 경과 시간에 따라 전자 팽창 밸브의 초기개도를 조절하여 압축기를 운전시키는 제 2단계를 포함하는 것을 특징으로 하는 냉방기의 전자 팽창 밸브 기동방법.And a second step of determining the elapsed time after the compressor is turned off by the temperature difference, and adjusting the initial opening of the electromagnetic expansion valve according to the elapsed time to operate the compressor. . 제 2항에 있어서, 상기 제 2단계는,The method of claim 2, wherein the second step, 상기 온도차가 10도 이상이면 초기개도로서 정상개도를 로딩하고,If the temperature difference is 10 degrees or more, the normal opening degree is loaded as an initial opening degree, 상기 온도차가 5 - 10도이면 초기개도로서 정상개도+20을 로딩하고,When the temperature difference is 5 to 10 degrees, the normal opening degree is +20 loading. 상기 온도차가 5도 이하이면 초기개도로서 정상개도+40을 로딩하는 것을 특징으로 하는 냉방기의 전자 팽창 밸브 기동방법.When the temperature difference is 5 degrees or less, the electronic expansion valve starting method of the air conditioner, characterized in that the normal opening + 40 is loaded as the initial opening.
KR10-2000-0001382A 2000-01-12 2000-01-12 Method for starting an electronic expansion valve of a cooling apparatus KR100399318B1 (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100373075B1 (en) * 2000-06-07 2003-02-25 삼성전자주식회사 Control system for starting of air conditioner and control method thereof
CN103807970A (en) * 2012-11-12 2014-05-21 珠海格力电器股份有限公司 Control method and control device of air conditioner
CN103940024A (en) * 2013-01-22 2014-07-23 珠海格力电器股份有限公司 Air conditioner and control system and control method for exhaust temperature of air conditioner compressor
CN104949413B (en) * 2015-07-07 2017-06-30 珠海格力电器股份有限公司 The method and apparatus for obtaining electric expansion valve initial opening
KR20170099101A (en) * 2016-02-23 2017-08-31 엘지전자 주식회사 Air conditioner and a method for controlling the same
CN110470027A (en) * 2019-09-19 2019-11-19 四川虹美智能科技有限公司 A kind of DC fan adjusting method, controller and thermoregulating system
CN113432274A (en) * 2021-06-17 2021-09-24 中洁环境科技(西安)集团有限公司 Method and device for adjusting opening of electronic expansion valve and full-quality air conditioner

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100373075B1 (en) * 2000-06-07 2003-02-25 삼성전자주식회사 Control system for starting of air conditioner and control method thereof
CN103807970A (en) * 2012-11-12 2014-05-21 珠海格力电器股份有限公司 Control method and control device of air conditioner
CN103940024A (en) * 2013-01-22 2014-07-23 珠海格力电器股份有限公司 Air conditioner and control system and control method for exhaust temperature of air conditioner compressor
CN103940024B (en) * 2013-01-22 2016-06-01 珠海格力电器股份有限公司 The Controlling System of conditioner and cooler compressor exhaust temperature and control method
CN104949413B (en) * 2015-07-07 2017-06-30 珠海格力电器股份有限公司 The method and apparatus for obtaining electric expansion valve initial opening
KR20170099101A (en) * 2016-02-23 2017-08-31 엘지전자 주식회사 Air conditioner and a method for controlling the same
CN110470027A (en) * 2019-09-19 2019-11-19 四川虹美智能科技有限公司 A kind of DC fan adjusting method, controller and thermoregulating system
CN113432274A (en) * 2021-06-17 2021-09-24 中洁环境科技(西安)集团有限公司 Method and device for adjusting opening of electronic expansion valve and full-quality air conditioner

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