KR950029717A - Refrigerant flow control method and device for inverter room air conditioner - Google Patents

Refrigerant flow control method and device for inverter room air conditioner Download PDF

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Publication number
KR950029717A
KR950029717A KR1019940008038A KR19940008038A KR950029717A KR 950029717 A KR950029717 A KR 950029717A KR 1019940008038 A KR1019940008038 A KR 1019940008038A KR 19940008038 A KR19940008038 A KR 19940008038A KR 950029717 A KR950029717 A KR 950029717A
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degree
heat exchange
refrigerant flow
air conditioner
opening degree
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KR1019940008038A
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Korean (ko)
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KR0127317B1 (en
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염관호
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이헌조
주식회사 엘지전자
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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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • 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
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/50—Load
    • 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
    • F25B2600/02—Compressor control
    • F25B2600/021—Inverters therefor

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

본 발명은 인버터 룸에어콘의 냉매유량 제어방법 및 장치에 관한 것으로서, 이는 냉동 사이클의 부하 변동 및 주파수의 가변에 따라 냉매 유량을 비례적으로 가변시켜 최적의 냉동 사이클 및 고효율화를 유지하고 전자 팽창변의 제어범위를 넓게 하여 에어없이 안정상태를 유지하도록 한 것이다. 이와같이 본 발명은 제어대상의 운전주파수에 따라 열교환 수단의 압력 손실을 예측하여 보정량을 구하는 과정과, 상기 예측한 보정량과 열교환 수단으로부터 얻어진 현재의 입, 출구측 온도 및 사용자로 부터 설정되어 얻어진 목표 과열도와를 연산하여 냉매의 유량을 제어하는 제어대상의 열림정도 증가분을 구하는 과정과, 상기에서 구한 현 열림정도의 증가분과 이전의 열림 정도값에 따라 제어대상의 열림정도를 제어하여 열교환 수단으로의 냉매 유입량을 조절하는 과정으로 이루어짐으로써, 달성된다.The present invention relates to a method and apparatus for controlling a refrigerant flow rate of an inverter room air conditioner, which is configured to proportionally change a refrigerant flow rate according to a load variation and a frequency of a refrigeration cycle to maintain an optimal refrigeration cycle and high efficiency, and to control an electronic expansion valve. The range is widened to maintain a stable state without air. As described above, the present invention provides a process of obtaining a correction amount by estimating the pressure loss of the heat exchange means according to the operating frequency of the control target, and the target overheating obtained by setting the predicted correction amount and the current inlet and outlet temperature obtained from the heat exchange means and the user. Calculating the degree of opening degree of the control object that controls the flow rate of the refrigerant by calculating the degree, and controlling the degree of opening of the control object according to the increase of the current degree of opening obtained above and the previous degree of opening value, and the refrigerant to the heat exchange means. This is achieved by the process of adjusting the inflow rate.

Description

인버터 룸에어콘의 냉매유량 제어방법 및 장치Refrigerant flow control method and device for inverter room air conditioner

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제2도는 본 발명 인버터 룸에어콘의 냉매 사이클 계통도, 제3도는 제2도 전자 팽창변을 보다 상세하게 보인 구성도, 제4도는 제2도 전자 팽창변의 전압인가에 따른 유량 특성 곡선도, 제5도는 제2도 전자 팽창변의 펄스수에 따른 유량 특성 곡선도, 제6도는 제2도의 운전주파수에 따른 실외측 열교환기의 압력손실 보정량을 보인도, 제7도는 제2도의 설명에 대한 신호 흐름도.2 is a schematic diagram showing the refrigerant cycle of the inverter room air conditioner of the present invention, FIG. 3 is a configuration diagram showing in detail the second electron expansion valve, and FIG. 4 is a flow characteristic curve diagram according to the voltage applied to the electron expansion valve of FIG. FIG. 2 is a flow characteristic curve diagram according to the number of pulses of an electron expansion valve, and FIG. 6 is a diagram illustrating a pressure loss correction amount of an outdoor heat exchanger according to an operating frequency of FIG. 2, and FIG. 7 is a signal flow chart for explaining the description of FIG.

Claims (10)

냉매를 공급 차단하는 제어대상의 운전주파수에 따라 열교환 수단의 압력 손실을 예측하여 보정량(ΔT1)을 구하는 과정과, 상기 예측한 보정량과 열교환 수단으로부터 얻어진 현재의 입, 출구측 온도(T1)(T2) 및 사용자로부터 설정되어 얻어진 목표 과열도(SHo)와를 연산하여 냉매를 공급 차단하는 제어대상의 열림정도 증가분(ΔP)을 구하는 과정과, 상기에서 구한 현 열림정도 증가분과 이전의 열림 정도값에 따라 제어대상의 최종 열림정도 조작량(P′)을 구하여 열교환 수단으로의 냉매 유입량을 단계적으로 조절하는 과정으로 반복 수행함을 특징으로 한 인버터 룸에어콘의 냉매유량 제어방법.Calculating a correction amount ΔT1 by predicting the pressure loss of the heat exchange means according to the operating frequency of the control target to cut off the refrigerant, and the current inlet / outlet temperature T1 (T2) obtained from the estimated correction amount and the heat exchange means. ) And calculating the opening degree of increase (ΔP) of the control target to cut off the refrigerant by calculating the target superheat degree (SHo) and the value set by the user, and according to the current opening degree increase and the previous opening degree value obtained above. Refrigerant flow rate control method of the inverter room air conditioner, characterized in that the repetition of the step of controlling the refrigerant flow into the heat exchange means by obtaining the final opening degree operation amount (P ′) of the control target. 제1항에 있어서, 제어대상의 열림정도 증가분(ΔP)을 구하는 과정은, 상기 열교환 수단으로부터 얻어진 입구측 온도(T1)와 보정량(ΔT1)의 차로 포화 온도값(Te)을 구사는 단계와, 상기 포화 온도값(Te)과 열교환 수단으로부터 얻어진 출구측 온도(T2)와의 차로 과열도(SH)를 구하는 단계와, 상기 구한 과열도(SH)와 사용자의 목표 과열도(SHo)와를 감산하여 편차(ep)를 구하는 단계와, 상기 편차(ep)를 이용하여 열림정도 증가분(ΔP)을 구하는 단계로 이루어짐을 특징으로 한 인버터 룸에어콘의 냉매유량 제어방법.The process of claim 1, wherein the step of determining the opening degree increase ΔP of the control target comprises: calculating the saturation temperature value Te by the difference between the inlet side temperature T1 and the correction amount ΔT1 obtained from the heat exchange means; Obtaining the superheat degree SH by the difference between the saturation temperature value Te and the outlet temperature T2 obtained from the heat exchange means, and subtracting the obtained superheat degree SH from the target superheat degree SHo of the user. (E) and a step of determining the opening degree increase (ΔP) by using the deviation (ep), the refrigerant flow control method of the inverter room air conditioner. 제1항에 있어서, 열교환 수단의 입, 출구측 온도(T1)(T2)는 난방모드시의 온도인 것을 특징으로 한 인버터 룸에어콘의 냉매유량 제어방법.The method of controlling a refrigerant flow rate of an inverter room air conditioner according to claim 1, wherein the inlet and outlet side temperatures (T1) (T2) of the heat exchange means are temperatures in heating mode. 제1항에 있어서, 열림정도의 증가분과 이전의 열림 정도값을 가산하여 최종 열림정도 조작량을 구하는 것을 특징으로 한 인버터 룸에어콘의 냉매유량 제어방법.The method of controlling the refrigerant flow rate of an inverter room air conditioner according to claim 1, wherein a final opening degree operation amount is obtained by adding an increase in the opening degree and a previous opening degree value. 제1항에 있어서, 열림정도 증가분(ΔP)는 하기와 같이. 구함을 특징으로 한 인버터 룸에어콘의 냉매유량 제어방법.The method of claim 1, wherein the degree of opening increase ΔP is as follows. Refrigerant flow rate control method of the inverter room air conditioner characterized in that. P=A{ep(t)-ep(t-1)}+ts{ep(t)+ep(t-1)}/2TP = A {ep (t) -ep (t-1)} + ts {ep (t) + ep (t-1)} / 2T 여기서, ts : 샘플링시각, A : 비례상수, T : 적분시간, ep(t) : 과열도 SH와 목표 과열도 SHo의 편차.Where ts is the sampling time, A is the proportional constant, T is the integral time, and ep (t) is the deviation between superheat SH and target superheat SH. 압축수단으로 부터 압축되어 얻어진 냉매를 응축 또는 증발하여 외부의 공기와 열교환시키는 제1, 제2 열교환수단의 입출구 사이에 설치되어 냉매의 흐름을 조정하는 전자 팽창부재와, 상기 어느 하나의 열교환수단 입,출구축에 설치되어 입,출구측에 온도를 감지하는 제1, 제2온도 감지부재와, 상기 제1, 제2 온도감지부재에서 감지되어 얻어진 입출구 온도와 전자 팽창부재의 운전 주파수 및 사용자가 설정한 목표 과열도와를 연산 처리하여 전자 팽창부재의 열림정도를 제어하는 마이콤을 포함하여 된 것을 특징으로 한 인버터 룸에어콘의 냉매유량 제어장치.An electronic expansion member installed between the inlets and outlets of the first and second heat exchange means for condensing or evaporating the refrigerant obtained by the compression means to heat exchange with the outside air, and adjusting the flow of the refrigerant; The first and second temperature sensing members installed on the outlet shaft to sense the temperature at the inlet and outlet sides, the inlet and outlet temperatures obtained by the first and second temperature sensing members and the operating frequency of the electronic expansion member are And a microcomputer for controlling the opening degree of the electronic expansion member by calculating and processing the set target superheat degree. 제6항에 있어서, 전자 팽창부재는 스텝모터인 것을 특징으로 한 인버터 룸 에어콘의 냉매유량 제어장치.7. The refrigerant flow rate control apparatus of an inverter room air conditioner according to claim 6, wherein the electronic expansion member is a step motor. 제7항에 있어서, 스텝모터는 전폐(全閉)에서 전개(全開)까지 240 스텝으로 이루어져 마이콤의 펄스에 따라 단계적으로 열림정도를 변화시키는 것을 특징으로 한 인버터 룸에어콘의 냉매유량 제어장치.8. The refrigerant flow rate control device of an inverter room air conditioner according to claim 7, wherein the step motor comprises 240 steps from fully closed to fully developed. 제7항에 있어서, 전자 팽창부재는 상기 스텝모터의 샤프트에 연결되어 마이콤의 펄스신호에 의한 샤프트의 미세 회전운동을 상하 직선왕북 운동으로 변화하여 입, 출구관을 미세하게 개폐하는 밸브샤프트를 더 포함한 것을 특징으로 한 인버터 룸 에어콘의 냉매유량 제어장치.The method of claim 7, wherein the electronic expansion member is connected to the shaft of the step motor to change the micro-rotational movement of the shaft by the pulse signal of the microcomputer to the up and down linear north north motion further to further open and close the valve shaft for the inlet and outlet pipe Refrigerant flow rate control device for an inverter room air conditioner comprising. 제6항에 있어서, 마이콤은 전자 팽창부재의 운전 주파수에 따라 열교환 수단의 압력손실을 예상한 보정량 (Δ T1)을 구하는 수단과, 상기 구한 보정량과 제1 온도 감지부재에서 얻어진 열교환 수단의 입구측 온도(T1)를 감산하여 포화 온도값(Te)을 구사는 수단과, 상기 구한 포화 온도값과 제2 온도 감지부재에서 얻어진 열교환 수단의 출구측 온도(T2)와를 감산하여 과열도(SH)를 구하는 수단과, 상기 구한 과열도와 사용자의 목표 과열도와를 감산하여 편차(ep)를 구하는 수단과, 상기 구한 편차를 이용하여 전자 팽창부재의 열림정도 증가분(ΔP)을 구하는 조정수단과, 상기 조정수단에서 얻어진 증가분과 이전의 전자 팽창부재의 열림정도(P(t-1))을 가산하여 최종 열림정도 조작량을 구하여 전자 팽창부재의 열림을 단계적으로 제어하는 수단으로 구성함을 특징으로 한 인버터 룸 에어콘의 냉매유량 제어장치.The method according to claim 6, wherein the microcomputer is a means for obtaining a correction amount Δ T1 in anticipation of the pressure loss of the heat exchange means according to the operating frequency of the electronic expansion member, and the inlet side of the heat exchange means obtained from the obtained correction amount and the first temperature sensing member. Subtract the temperature T1 to obtain the saturation temperature value Te, and subtract the obtained saturation temperature value and the outlet temperature T2 of the heat exchange means obtained from the second temperature sensing member to subtract the superheat degree SH. Means for obtaining a deviation (ep) by subtracting the obtained overheating degree and the target overheating degree of the user, adjusting means for obtaining the opening degree increment (ΔP) of the electronic expansion member using the obtained deviation, and the adjusting means. And means for controlling the opening of the electronic expansion member stepwise by calculating the final opening degree operation amount by adding the increase obtained in step S and the opening degree (P (t-1)) of the previous electronic expansion member. Refrigerant flow control system for a room air conditioner to the inverter. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940008038A 1994-04-16 1994-04-16 Refrigerator flow control method and apparatus of inverter room aircondition KR0127317B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100613024B1 (en) * 2005-03-12 2006-08-16 엘에스전선 주식회사 Deburring apparatus for metal tube

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100613024B1 (en) * 2005-03-12 2006-08-16 엘에스전선 주식회사 Deburring apparatus for metal tube

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