KR970034375A

KR970034375A - Control device and method of vehicle air conditioner

Info

Publication number: KR970034375A
Application number: KR1019950069109A
Authority: KR
Inventors: 정종대
Original assignee: 박상록; 주식회사 두원공조
Priority date: 1995-12-30
Filing date: 1995-12-30
Publication date: 1997-07-22

Abstract

본 발명은 적정한 과열도를 설정하여 공기조화기를 최적상태로 운전할 수 있는 차량용 공기조화기의 제어장치 및 그 제어방법에 관한 것으로써, 전기신호에 따라 작동되어 냉매의 흐름양을 조절하는 전자팽창밸브(100)와, 증발기 및 응축기의 공기입구온도를 감지하는 공기온도감지수단(50)과, 증발기 및 압축기의 냉매출구압력을 감지하는 냉매압력감지수단(60)과, 상기 공기온도감지수단(50)과 냉매압력감지수단(60)에 의해 감지된 감지신호에 따라 상기 전자팽창밸브(100)를 제어하는 제어수단(80)으로 이루어진 제어장치와 ; 공기온도 및 냉매압력을 감지하고, 상기 감지신호에 따라 다수의 기본에너지 지배방정식을 사용하여 냉매량을 결정하고 이에 따라 상기 전자팽창밸브의 개도값를 결정한 후, 상기 전자팽창밸브의 개도값에 따라 상기 전자팽창밸브의 개도를 조정하는 제어방법으로 이루어져, 외부의 여러 환경조건에 따라 전자팽창밸브의 개도를 조정함에 의해 일정한 과열도를 유지시켜 공기조화기를 최적상태로 운전할 수 있다.The present invention relates to a control device for a vehicle air conditioner that can operate an air conditioner in an optimal state by setting an appropriate degree of superheat, and a control method thereof, the electronic expansion valve being operated according to an electric signal to adjust the amount of refrigerant flow. (100), air temperature detecting means (50) for detecting the air inlet temperature of the evaporator and condenser, refrigerant pressure detecting means (60) for detecting the refrigerant outlet pressure of the evaporator and the compressor, and the air temperature detecting means (50). And a control means (80) for controlling the electronic expansion valve (100) in accordance with the detection signal detected by the refrigerant pressure detecting means (60); The air temperature and the refrigerant pressure are sensed, the amount of refrigerant is determined using a plurality of basic energy governing equations according to the detection signal, and the opening value of the electromagnetic expansion valve is determined accordingly. Consists of a control method for adjusting the opening of the expansion valve, it is possible to operate the air conditioner in an optimal state by maintaining a constant superheat degree by adjusting the opening of the electromagnetic expansion valve in accordance with various environmental conditions.

Description

Control device and method of vehicle air conditioner

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

제1도는 종래 차량용 공기조화기의 개략구성도.1 is a schematic configuration diagram of a conventional vehicle air conditioner.

제2도는 본 발명의 일실시예에 의한 제어장치가 적용된 차량용 공기조화기의 개략구성도.2 is a schematic configuration diagram of a vehicle air conditioner to which a control device according to an embodiment of the present invention is applied.

제3도는 본 발명의 일실시예에 의한 차량용 공기조화기의 제어장치 및 그 제어블록도.3 is a control apparatus and a control block diagram of a vehicle air conditioner according to an embodiment of the present invention.

제4a도 및 제4b도는 본 발명의 일실시예에 의한 차량용 공기조화기의 제어방법을 나타내는 플로우챠트.4A and 4B are flowcharts illustrating a method of controlling a vehicle air conditioner according to an embodiment of the present invention.

제5도는 본 발명의 일실시예에 의한 차량용 공기조화기의 제어방법을 설명하기 위한 냉매의 P-H선도(압력-엔탈피선도)이다.5 is a P-H diagram (pressure-enthalpy diagram) of a refrigerant for explaining a control method of a vehicle air conditioner according to an embodiment of the present invention.

Claims

The electronic expansion valve 100 is operated according to the electrical signal to adjust the flow amount of the refrigerant, the air temperature sensing means 50 for detecting the air inlet temperature of the evaporator and condenser, and the refrigerant outlet pressure of the evaporator and compressor And a control means (80) for controlling the electronic expansion valve (100) according to a monitoring signal sensed by the refrigerant pressure detecting means (60) and the air temperature detecting means (50) and the refrigerant pressure detecting means (60). Control device for a vehicle air conditioner, characterized in that.

The vehicle of claim 1, wherein the electromagnetic expansion valve has a structure in which a control motor 103 drives the refrigerant control plate 102 to adjust the opening degree of the refrigerant control plate 102 installed in the refrigerant passage. Control device of air conditioner.

A control method of an air conditioner that maintains a constant superheat degree by adjusting an opening degree of an electromagnetic expansion valve, the method comprising: a sensing step of sensing air temperature and refrigerant pressure by a refrigerant temperature sensing means and a refrigerant pressure sensing means, and sensing by the sensing system; The opening value determination step of determining the amount of refrigerant using a plurality of basic energy governing equations according to one detection signal and determining the opening degree of the electromagnetic expansion valve and the opening value of the electromagnetic expansion valve determined according to the opening degree determination step And an opening degree adjustment step of adjusting the opening degree of the electromagnetic expansion valve by driving the control motor.

The method of claim 3, wherein the opening value determination step determines the amount of refrigerant as R (1) to R (7) of the basic energy governing equations represented by the following equations (1) to (7) are smaller than 0.003, respectively. Control method of a vehicle air conditioner, characterized in that.

R (1) = mr (H1-H7) -Fpe mr (H1-H6) Formula (1)

R (2) = Qe-mr (H1-H6) Formula (2)

R (3) = Qe-UAe (ΔTe) equation (3)

R (4) = mr (H2-H3) -Fpc mr (H2-H5) Formula (4)

R (5) = mr (H5-H5) -Fbc mr (H2-H5) Formula (5)

R (2) = Qc-mr (H2-H5) Formula (6)

R (3) = Qc-UAc (ΔTc) Formula (7)

※ Note: The disclosure is based on the initial application.