JPH0367964U

JPH0367964U -

Info

Publication number: JPH0367964U
Application number: JP12657389U
Authority: JP
Priority date: 1989-10-31
Filing date: 1989-10-31
Publication date: 1991-07-03

Description

[Brief explanation of drawings]

第１図は、本考案の１実施例に係る空気調和機
の系統図、第２図は同実施例の制御器の機能ブロ
ツク線図、第３図は同実施例の初期弁開度特性説
明図、第４図は同実施例および従来例の作用説明
図、第５図は同実施例および従来例の過渡特性説
明図、第６図は、従来例の空気調和機の系統図、
第７図は同従来例のブロツク線図である。１……（インバータ）圧縮機、４……電子膨張
弁、９……吸入圧力センサ、１０……吸入温度セ
ンサ、１１……室内温度センサ（利用側熱交換器
の熱源温度センサ）、１２，１２Ａ……制御器、
１３……室外温度センサ。 Fig. 1 is a system diagram of an air conditioner according to an embodiment of the present invention, Fig. 2 is a functional block diagram of a controller of the embodiment, and Fig. 3 is an explanation of the initial valve opening characteristic of the embodiment. 4 is an explanatory diagram of the operation of the same embodiment and the conventional example, FIG. 5 is an explanatory diagram of transient characteristics of the same embodiment and the conventional example, and FIG. 6 is a system diagram of the conventional air conditioner.
FIG. 7 is a block diagram of the conventional example. 1... (inverter) compressor, 4... electronic expansion valve, 9... suction pressure sensor, 10... suction temperature sensor, 11... indoor temperature sensor (heat source temperature sensor of user side heat exchanger), 12, 12A...controller,
13...Outdoor temperature sensor.

Claims

[Scope of utility model registration request]

A variable frequency power source, a compressor driven at variable speed by the variable frequency power source, a heat exchanger connected to the compressor in sequence, an electronic expansion valve, a user-side heat exchanger, and a user-side heat exchanger. Control for controlling the output frequency of the variable frequency power supply according to the heat load or the heat load and the heat source temperature of the heat exchanger, and controlling the electronic expansion valve based on the valve opening signal to control the degree of heating of the intake gas. In a reversible cycle type air conditioner, the heat exchanger on the user side becomes a heat absorber and operates as a heat radiator by changing the flow direction of the working fluid, the operating frequency of the compressor and the heat exchanger The initial opening characteristic of the electronic expansion valve, which exhibits a valve opening approximately equal to the valve opening during normal operation, which is preset as a function of the heat source temperature, is stored, and the control signal corresponding to the operating frequency and the An initial valve opening setting means inputs the detected value of the heat source temperature and outputs an initial opening setting signal, and inputs the valve opening signal and the output of the initial valve opening setting means, and sets the same valve during operation. An air conditioner comprising expansion valve opening switching means for outputting an opening signal, outputting the output of the initial valve opening setting means at startup, and controlling the electronic expansion valve.