KR100548304B1 - Electronic expansion valve open control method for air conditioner - Google Patents

Electronic expansion valve open control method for air conditioner Download PDF

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KR100548304B1
KR100548304B1 KR1020040031149A KR20040031149A KR100548304B1 KR 100548304 B1 KR100548304 B1 KR 100548304B1 KR 1020040031149 A KR1020040031149 A KR 1020040031149A KR 20040031149 A KR20040031149 A KR 20040031149A KR 100548304 B1 KR100548304 B1 KR 100548304B1
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expansion valve
opening
value
change
degree
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KR1020040031149A
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Korean (ko)
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KR20050105873A (en
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황윤제
조은준
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엘지전자 주식회사
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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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • 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
    • 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)
  • Air Conditioning Control Device (AREA)

Abstract

본 발명은 공기조화기의 전자팽창밸브 개도 제어방법에 관한 것으로, 전자팽창밸브의 개도를, 공기조화기의 운전중에 가변하는 실내외 온도,압축기 운전용량,실내외 풍량등을 실시간으로 적용하여, 최적의 값으로 설정함으로써, 시스템의 안전화 속도 및 신뢰성을 향상시키도록 한 것이다. 이를 위하여 본 발명은 냉방 또는 난방 부하에 따라 용량을 가변시키는 다수의 압축기와 전자팽창밸브의 개도값에 따라 냉매배관을 통하는 냉매유량을 가변시키는 공기조화기에 있어서, 과열도의 변화에 따른 전자팽창밸브의 개도값을 설정하는 과정과; 냉방운전 또는 난방운전중에 부하의 변동을 감지하고, 그 부하의 변동에 따른 개도값 보정치를 연산하는 과정과; 상기 전자 팽창밸브의 개도값과 개도값 보정치를 적용하여 실제 개도값을 검출하는 과정과; 상기 실제개도값으로 전자팽창밸브를 동작시키는 과정으로 수행한다.The present invention relates to a method of controlling the opening degree of the electronic expansion valve of an air conditioner, by applying the opening degree of the electromagnetic expansion valve in real time by varying the indoor and outdoor temperature, the compressor operating capacity, the indoor and outdoor air volume during the operation of the air conditioner, By setting the value, the safety speed and reliability of the system are improved. To this end, the present invention in the air conditioner for varying the refrigerant flow rate through the refrigerant pipe in accordance with the opening value of the plurality of compressors and the electromagnetic expansion valve for varying the capacity according to the cooling or heating load, the electronic expansion valve according to the change in the superheat degree Setting an opening degree of? Detecting a change in the load during the cooling operation or the heating operation, and calculating an opening value correction value according to the change in the load; Detecting an actual opening value by applying an opening value and an opening value correction value of the electromagnetic expansion valve; The electronic expansion valve is operated to the actual opening value.

Description

공기조화기의 전자팽창밸브 개도 제어방법{ELECTRONIC EXPANSION VALVE OPEN CONTROL METHOD FOR AIR CONDITIONER}ELECTRONIC EXPANSION VALVE OPEN CONTROL METHOD FOR AIR CONDITIONER

도1은 두개의 압축기를 채용한 공기조화기의 냉방 사이클을 도시한 구성도.1 is a block diagram showing a cooling cycle of an air conditioner employing two compressors.

도2는 종래 공기조화기의 전자팽창 밸브 개도제어방법에 따른 과열도의 변화량을 보인도.Figure 2 is a diagram showing the amount of change in the superheat according to the conventional method for controlling the opening of the electromagnetic expansion valve of the air conditioner.

도3은 공기조화기의 전자팽창밸브 개도 제어방법에 대한 실시예의 동작흐름도.3 is a flow chart of an embodiment of a method for controlling the opening degree of an electromagnetic expansion valve of an air conditioner.

도4는 본 발명 공기조화기의 전자팽창 밸브 개도제어방법에 따른 과열도의 변화량을 보인도. Figure 4 is a diagram showing the amount of change in the superheat according to the electromagnetic expansion valve opening control method of the air conditioner of the present invention.

본 발명은 공기조화기의 전자팽창밸브 개도제어방법에 관한 것으로, 특히 전자팽창밸브의 개도를, 공기조화기의 운전중에 가변하는 실내외 온도,압축기 운전용량,실내외 풍량등을 실시간으로 적용하여, 최적의 값으로 설정하도록 한 공기조화기의 전자팽창밸브 개도제어방법에 관한 것이다.The present invention relates to a method for controlling the opening degree of an electronic expansion valve of an air conditioner, and in particular, the opening degree of an electromagnetic expansion valve is applied in real time by varying the indoor / outdoor temperature, the compressor operating capacity, the indoor / outdoor air volume, and the like during operation of the air conditioner. A method for controlling the opening degree of an electromagnetic expansion valve of an air conditioner to be set to a value of.

일반적으로, 공기조화기는 저온저압의 기체상태인 냉매를 고온고압의 기체상 태인 냉매로 압축하는 압축기와, 상기 압축기에서 압축된 고온고압의 기체상태인 냉매를 중온고압의 액체상태의 냉매로 변화시키는 응축기와, 상기 응축기에서 변화된 중온고압의 액체상태인 냉매를 저온저압의 액체상태의 냉매로 변화시키는 전자팽창밸브와, 저온저압의 액체상태 냉매를 기체 상태의 냉매로 변화시키는 증발기 및 냉난방모드에 따라 냉매의 유로를 바꾸어주는 사방밸브를 포함하여 구성된다.In general, an air conditioner is a compressor for compressing a low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gaseous refrigerant, and a high-temperature, high-pressure gaseous refrigerant compressed by the compressor to a medium-temperature high-pressure liquid refrigerant In accordance with the condenser, the electronic expansion valve for changing the medium-temperature and high-pressure liquid state refrigerant in the condenser to a low-temperature low-pressure liquid state refrigerant, the evaporator for changing the low-temperature low-pressure liquid state refrigerant to a gaseous state and the cooling and heating mode It comprises a four-way valve for changing the flow path of the refrigerant.

상기 공기조화기에서 실내열교한기와 실외열교환기는 냉난방모드에 따라 그 역할이 달라지는데, 난방모드에서는 실내열교환기가 응축기 역할을 수행하고, 실외열교환기가 증발기 역할을 수행하는데 비하여 냉방모드에서는 실내열교환기가 증발기 역할을 수행하고 실외열교환기가 응축기 역할을 수행한다.In the air conditioner, the indoor heat exchanger and the outdoor heat exchanger have different roles depending on the cooling and heating mode. In the heating mode, the indoor heat exchanger serves as a condenser and the outdoor heat exchanger serves as an evaporator. And the outdoor heat exchanger acts as a condenser.

또한, 최근에는 서로 다른 용량을 가지는 다수의 압축기를 사용함으로써, 냉방부하 또는 난방부하에 따라 용량을 가변시킬 수 있도록 하여 냉방 및 난방 효율을 최적화할 수 있도록 하고 있다.In addition, recently, by using a plurality of compressors having different capacities, it is possible to optimize the cooling and heating efficiency by varying the capacity according to the cooling load or heating load.

도1은 두개의 압축기를 채용한 공기조화기의 냉방 사이클을 도시한 구성도이다.1 is a block diagram showing a cooling cycle of an air conditioner employing two compressors.

도1에 도시된 바와같이, 냉매를 고온고압의 기체 냉매로 압축하는 서로 다른 용량을 가진 제1 및 제2 압축기(11,12)와, 냉매를 실외공기와 열교환시켜 중온고압의 액체 냉매로 응축시키는 실외열교한기(14) 및 상기 실외 열교환기측으로 공기를 송풍시키는 실외팬(14a)과, 상기 실외열교환기(14)를 통과한 냉매를 저온저압의 액체 냉매로 감압시키는 전자팽창밸브(15)와 상기 전자팽창밸브를 통과한 냉매를 실내공기와 열교환시키는 실내열교환기(16) 및 상기 실내 열교환기(16)측으로 공기를 송풍시키는 실내팬(16a)과, 상기 실내열교환기(16)를 통과한 냉매로부터 액체 냉매를 분리하고 기체 냉매만 상기 제1 및 제2 압축기(11,12)로 공급하는 어큐뮬레이터 (17)를 포함하여 구성된다.As shown in FIG. 1, the first and second compressors 11 and 12 having different capacities for compressing a refrigerant into a gas refrigerant having a high temperature and high pressure, and the refrigerant are condensed into a liquid refrigerant having a medium temperature and high pressure by exchanging the refrigerant with outdoor air. An outdoor expansion bridge (14), an outdoor fan (14a) for blowing air to the outdoor heat exchanger side, and an electromagnetic expansion valve (15) for reducing the refrigerant passing through the outdoor heat exchanger (14) to a low temperature low pressure liquid refrigerant And an indoor heat exchanger (16) for exchanging the refrigerant passing through the electromagnetic expansion valve with indoor air, an indoor fan (16a) for blowing air to the indoor heat exchanger (16), and the indoor heat exchanger (16). And an accumulator 17 which separates the liquid refrigerant from one refrigerant and supplies only the gaseous refrigerant to the first and second compressors 11 and 12.

또한, 상기 두개의 압축기를 채용한 공기조화기는, 상기 제1 및 제2 압축기 (11,12)에의 압축된 냉매의 역류를 방지하는 체크밸브(11a,12a)와, 상기 제1 및 제2 압축기(11,12)를 통과한 냉매의 유로를 절환시켜 열교환기의 역할이 바뀌도록 하는 사방밸브(13)를 더 포함한다.In addition, the air conditioners employing the two compressors include check valves 11a and 12a for preventing backflow of compressed refrigerant to the first and second compressors 11 and 12, and the first and second compressors. It further includes a four-way valve 13 for switching the flow path of the refrigerant passing through (11, 12) to change the role of the heat exchanger.

이와같은 공기조화기에 있어서, 전자팽창밸브는,기절성된 전자팽창밸브 개도값에 따라 냉매유량을 가변시키는데, 즉 전자팽창밸브는 과열도에 따라 기설정된 개도값으로 냉매유량을 가변시킨다.In such an air conditioner, the electromagnetic expansion valve varies the refrigerant flow rate in accordance with the stunned electromagnetic expansion valve opening value, that is, the electromagnetic expansion valve varies the refrigerant flow rate to a predetermined opening value in accordance with the degree of superheat.

이와같이 종래 전자 팽창밸브는, 압축기 용량 및 냉난방 운전상태에 따른 과열도에 따라, 기설정된 개도값으로 냉매유량을 가변시키는데, 즉 종래 전자 팽창밸브는, 공기조화기의 운전중에 가변하는 요소인, 실내외 온도 변화, 압축기 운전용량 변화, 실내외 풍량변화를 실시간으로 적용하지 못하고, 기설정된 일관된 전자팽창밸브의 개도값으로 공기조화기를 운전하기 때문에, 도2와 같이 현재 과열도가 목표과열도로 수렴하지 못하거나 수렴하는데 장시간이 걸리는 문제점이 있고, 또한 전자팽창밸브의 개도값이 실제 유입되는 냉매의 유입량에 비해 작게 설정되는 경우에 과열도가 낮아 액냉매가 유이되는 구간에서 압축기의 신뢰성을 저하시키는 문제점이 있다.As described above, the conventional solenoid expansion valve varies the refrigerant flow rate to a predetermined opening value according to the compressor capacity and the degree of superheating according to the heating and cooling operation state. That is, the conventional solenoid expansion valve is a variable element during operation of the air conditioner. Since the temperature change, the compressor operating capacity change, the indoor / outdoor air volume change cannot be applied in real time, and the air conditioner is operated at the preset opening value of the predetermined constant electromagnetic expansion valve, the current superheat cannot converge to the target superheat as shown in FIG. There is a problem that it takes a long time to converge, and when the opening value of the electronic expansion valve is set smaller than the amount of refrigerant actually introduced, there is a problem that the superheat is low and the reliability of the compressor is deteriorated in the section where liquid refrigerant flows. .

본 발명은 상기와 같은 문제점을 해결하기 위하여 안출된 것으로, 전자팽창밸브의 개도를, 공기조화기의 운전중에 가변하는 실내외 온도,압축기 운전용량,실내외 풍량등을 실시간으로 적용하여, 최적의 값으로 설정함으로써, 시스템의 안전화 속도 및 신뢰성을 향상시키도록 한 공기조화기의 전자 팽창밸브 개도 제어방법을 제공함에 그 목적이 있다. The present invention has been made to solve the above problems, by applying the opening degree of the electronic expansion valve in real time by varying the indoor and outdoor temperature, the compressor operating capacity, the indoor and outdoor air volume during operation of the air conditioner, It is an object of the present invention to provide a control method for opening the electronic expansion valve of the air conditioner to improve the safety speed and reliability of the system.

상기와 같은 목적을 달성하기 위한 본 발명은, 냉방 또는 난방 부하에 따라 용량을 가변시키는 다수의 압축기와 전자팽창밸브의 개도값에 따라 냉매배관을 통하는 냉매유량을 가변시키는 공기조화기에 있어서, 과열도의 변화에 따른 전자팽창밸브의 개도값을 설정하는 과정과; 냉방운전 또는 난방운전중에 부하의 변동을 감지하고, 그 부하의 변동에 따른 개도값 보정치를 연산하는 과정과; 상기 전자 팽창밸브의 개도값과 개도값 보정치를 적용하여 실제 개도값을 검출하는 과정과; 상기 실제개도값으로 전자팽창밸브를 동작시키는 과정으로 수행함을 특징으로 한다.The present invention for achieving the above object, in the air conditioner for varying the refrigerant flow rate through the refrigerant pipe in accordance with the opening value of the plurality of compressors and the electromagnetic expansion valve variable capacity according to the cooling or heating load, Setting an opening value of the electromagnetic expansion valve according to the change of? Detecting a change in the load during the cooling operation or the heating operation, and calculating an opening value correction value according to the change in the load; Detecting an actual opening value by applying an opening value and an opening value correction value of the electromagnetic expansion valve; Characterized in that the process of operating the electronic expansion valve to the actual opening value.

이하, 본 발명에 의한 공기조화기의 전자 팽창밸브 개도 제어방법에 대한 작용 및 효과를 첨부한 도면을 참조하여 상세히 설명한다.Hereinafter, with reference to the accompanying drawings, the operation and effects of the electronic expansion valve opening degree control method of the air conditioner according to the present invention will be described in detail.

도3은 본 발명 공기조화기의 전자팽창 밸브 개도제어방법에 대한 실시예의 동작흐름도이다.3 is a flowchart illustrating an embodiment of a method for controlling the opening degree of an electromagnetic expansion valve of the air conditioner of the present invention.

도3에 도시한 바와같이, 본 발명은 과열도의 변화에 따른 전자팽창밸브의 개도값을 설정하는 과정(SP1)과; 냉방운전 또는 난방운전중에 부하의 변동을 감지하고, 그 부하의 변동에 따른 개도값 보정치를 연산하는 과정(SP2,SP3)과; 상기 전자 팽창밸브의 개도값과 개도값 보정치를 적용하여 실제 개도값을 검출하는 과정(SP4)과; 상기 실제개도값으로 전자팽창밸브를 동작시키는 과정(SP5)으로 이루어지며, 이와같은 본 발명의 동작을 설명한다.As shown in FIG. 3, the present invention provides a process SP1 for setting an opening value of an electromagnetic expansion valve according to a change in superheat degree; Detecting a change in the load during the cooling operation or the heating operation, and calculating an opening value correction value according to the change in the load (SP2, SP3); Detecting an actual opening value by applying the opening value and the opening value correction value of the electromagnetic expansion valve (SP4); The process of operating the electromagnetic expansion valve to the actual opening value (SP5) is made, it will be described the operation of the present invention.

먼저, 과열도의 변화에 따른 전자팽창밸브의 개도값을 설정한다(SP1).First, the opening value of the electromagnetic expansion valve according to the change in superheat degree is set (SP1).

즉, 압축기의 목표과열도 및 이전 과열도차를 설정한 다음, 압축기의 현재 과열도를 측정하고, 그 현재 과열도와 상기 목표과열도로부터 현재 과열도차를 연산하여, 그 현재 과열도차와 상기 이전 과열도차로부터 과열도차의 변화량을 연산한 다음, 상기 과열도차 변화량으로부터 목표과열도에 이르기 위한 전자팽창 밸브 개도값을 설정한다.That is, after setting the target superheat degree and the previous superheat degree difference of the compressor, the current superheat degree of the compressor is measured, and the current superheat degree difference is calculated from the current superheat degree and the target superheat degree, and the current superheat degree difference and the The change amount of the superheat difference is calculated from the previous superheat degree difference, and then the electromagnetic expansion valve opening value for reaching the target superheat degree is set from the superheat difference change amount.

그 다음, 사용자에 의해,선택된 냉방운전 또는 난방운전중에 부하의 변동을 감지하고(SP2), 그 부하의 변동에 따른 개도값 보정치를 연산한다(SP3);Then, by the user, the variation of the load is sensed during the selected cooling operation or the heating operation (SP2), and the opening value correction value corresponding to the variation of the load is calculated (SP3);

이때, 상기 부하의 변동은, 실내외 온도 변화, 압축기 운전용량 및 실내외 풍량 변화에 의해 감지한다.In this case, the load change is detected by a change in the indoor / outdoor temperature, a compressor operating capacity, and a change in the indoor / outdoor air volume.

상기 개도값 보정치(X)는, 실험에 의해 ,하기의 일차식에 의해 연산된다.The said opening value correction value X is computed by the following linear formula by experiment.

[수학식][Equation]

X=aα+bβ+c X = aα + bβ + c

여기서, X는 개도값 보정치, α는 압축기의 운전 조건(실내온도,실외온도,실내풍량, 실외풍량중 어느 하나를 선택), β는 압축기 운전 용량, a는 압축기의 운전 조건 대 목표 전자팽창밸브 개도의 비례 상수, b는 압축기 운전 용량 대 목표 전자 팽창 밸브 개도의 비례 상수, c는 목표 전자팽창 밸브 개도의 오프셋.Where X is the opening value correction value, α is the compressor operating condition (choose any one of indoor temperature, outdoor temperature, indoor air volume and outdoor air volume), β is the compressor operating capacity, and a is the compressor's operating condition versus the target electromagnetic expansion valve. The proportionality constant of the opening degree, b is the proportionality constant of the compressor operation capacity versus the target electromagnetic expansion valve, and c is the offset of the opening degree of the target electromagnetic expansion valve.

그 다음, 상기 전자 팽창밸브의 개도값과 개도값 보정치를 적용하여 실제 개도값을 검출하는데(SP4), 즉 상기 전자 팽창밸브의 개도 설정값을, 상기 개도보정치로 나누어서 검출한다.Then, the actual opening value is detected by applying the opening value and the opening value correction value of the electromagnetic expansion valve (SP4), that is, the opening degree setting value of the electromagnetic expansion valve is detected by dividing the opening degree correction value.

그 다음, 상기 실제개도값으로 전자팽창밸브를 동작시킨다(SP5).Then, the electromagnetic expansion valve is operated to the actual opening value (SP5).

도4는 본 발명에 의해, 목표과열도에 수렴하는 모습을 보인 파형도로서, 종래 도2에 비하여, 압축기 운전을 시작하여 안정될때까지 걸리는 시간이 단축됨을 알수 있는데, 즉 초기 기동제어시에는 전자팽창밸브의 개도값이 점진적으로 증가하다가 안정시의 시간대에 이르면 소정의 변동폭 범위안에서 빠르게 안정된 값으로 제어됨을 알 수 있다.FIG. 4 is a waveform diagram showing convergence to a target superheat diagram according to the present invention. Compared to the conventional FIG. 2, it can be seen that the time taken for the compressor to start operation and stabilize is shortened. It can be seen that the opening degree of the expansion valve gradually increases and then reaches a stable time and is quickly controlled to a stable value within a predetermined fluctuation range.

다시 말해서, 본 발명은 전자팽창밸브의 개도를, 공기조화기의 운전중에 가변하는 실내외 온도,압축기 운전용량,실내외 풍량등을 실시간으로 적용하여, 최적의 값으로 설정하도록 한 것이다.In other words, the present invention is to set the opening degree of the electronic expansion valve to the optimum value by applying in real time the variable indoor and outdoor temperature, the compressor operating capacity, the indoor and outdoor air volume during the operation of the air conditioner.

상기 본 발명의 상세한 설명에서 행해진 구체적인 실시 양태 또는 실시예는 어디까지나 본 발명의 기술 내용을 명확하게 하기 위한 것으로 이러한 구체적 실시예에 한정해서 협의로 해석해서는 안되며, 본 발명의 정신과 다음에 기재된 특허 청구의 범위내에서 여러가지 변경 실시가 가능한 것이다.The specific embodiments or examples made in the detailed description of the present invention are intended to clarify the technical contents of the present invention to the extent that they should not be construed as limited to these specific embodiments and should not be construed in consultation. Various changes can be made within the scope of.

이상에서 상세히 설명한 바와같이 본 발명은, 전자팽창밸브의 개도를, 공기조화기의 운전중에 가변하는 실내외 온도,압축기 운전용량,실내외 풍량등을 실시간으로 적용하여, 최적의 값으로 설정함으로써, 시스템의 안전화 속도 및 신뢰성을 향상시키는 효과가 있다. As described in detail above, the present invention sets the optimum value of the electronic expansion valve by applying the variable indoor / outdoor temperature, compressor operation capacity, indoor / outdoor air volume, etc. in real time during operation of the air conditioner. It has the effect of improving the safety speed and reliability.

Claims (5)

냉방 또는 난방 부하에 따라 용량을 가변시키는 다수의 압축기와 전자팽창밸브의 개도값에 따라 냉매배관을 통하는 냉매유량을 가변시키는 공기조화기에 있어서,In the air conditioner for varying the refrigerant flow rate through the refrigerant pipe in accordance with the number of compressors of the variable capacity according to the cooling or heating load and the opening value of the electromagnetic expansion valve, 과열도의 변화에 따른 전자팽창밸브의 개도값을 설정하는 과정과;Setting an opening value of the electromagnetic expansion valve according to the change in superheat degree; 냉방운전 또는 난방운전중에 부하의 변동을 감지하고, 그 부하의 변동에 따른 개도값 보정치를 연산하는 과정과;Detecting a change in the load during the cooling operation or the heating operation, and calculating an opening value correction value according to the change in the load; 상기 전자 팽창밸브의 개도값과 개도값 보정치를 적용하여 실제 개도값을 검출하는 과정과;Detecting an actual opening value by applying an opening value and an opening value correction value of the electromagnetic expansion valve; 상기 실제개도값으로 전자팽창밸브를 동작시키는 과정으로 수행함을 특징으로 하는 공기조화기의 전자팽창밸브 개도제어방법.And a step of operating the electronic expansion valve by the actual opening value. 제1 항에 있어서, 과열도의 변화에 따른 전자팽창밸브의 개도값을 설정하는 과정은,The process of claim 1, wherein the setting of the opening value of the electromagnetic expansion valve according to the change of the superheat degree is performed. 압축기의 목표과열도 및 이전 과열도차를 설정하는 단계와;Setting a target superheat degree and a previous superheat degree difference of the compressor; 압축기의 현재 과열도를 측정하고, 그 현재 과열도와 상기 목표과열도로부터 현재 과열도차를 연산하는 단계와; Measuring a current superheat degree of the compressor, and calculating a current superheat degree difference from the current superheat degree and the target superheat degree; 상기 현재 과열도차와 상기 이전 과열도차로부터 과열도차의 변화량을 연산하는 단계와;Calculating a change amount of the superheat difference from the current superheat difference and the previous superheat difference; 상기 과열도차 변화량으로부터 목표과열도에 이르기 위한 전자팽창 밸브 개도값을 설정하는 단계로 이루어진 것을 특징으로 하는 공기조화기의 전자팽창밸브 개도 제어방법.And a step of setting an electromagnetic expansion valve opening value for reaching a target superheat degree from the amount of change in the superheat degree difference. 제1 항에 있어서, 부하의 변동은, The method of claim 1, wherein the change in load, 실내외 온도 변화, 압축기 운전용량 및 실내외 풍량변화에 의해 감지하는 것을 특징으로 하는 공기조화기의 전자 팽창밸브 개도 제어방법.A method for controlling the opening of an electronic expansion valve of an air conditioner, characterized by sensing by indoor / outdoor temperature change, compressor operating capacity, and indoor / outdoor air volume change. 제1 항에 있어서, 개도값 보정치는,The method of claim 1, wherein the opening value correction value, 하기의 일차식에 의해 연산되는 것을 특징으로 하는 공기조화기의 전자팽창밸브 개도 제어방법.An electronic expansion valve opening degree control method for an air conditioner, which is calculated by the following first equation. [수학식][Equation] X=aα+bβ+c X = aα + bβ + c 여기서, X는 개도값 보정치, α는 압축기의 운전 조건(실내온도,실외온도,실내풍량, 실외풍량중 어느 하나를 선택), β는 압축기 운전 용량, a는 압축기의 운전 조건 대 목표 전자팽창밸브 개도의 비례 상수, b는 압축기 운전 용량 대 목표 전자 팽창 밸브 개도의 비례 상수, c는 목표 전자팽창 밸브 개도의 오프셋.Where X is the opening value correction value, α is the compressor operating condition (choose any one of indoor temperature, outdoor temperature, indoor air volume and outdoor air volume), β is the compressor operating capacity, and a is the compressor's operating condition versus the target electromagnetic expansion valve. The proportionality constant of the opening degree, b is the proportionality constant of the compressor operation capacity versus the target electromagnetic expansion valve, and c is the offset of the opening degree of the target electromagnetic expansion valve. 제1 항에 있어서, 실제 개도값은,The method of claim 1, wherein the actual opening value is, 상기 전자 팽창밸브의 개도 설정값을, 상기 개도보정치로 나누어서 검출하는 것을 특징으로 하는 공기조화기의 전자팽창 밸브 개도 제어방법.And the opening degree setting value of said electromagnetic expansion valve is divided by said opening degree correction value to detect the opening degree setting value of said electromagnetic expansion valve.
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