JPH0334564U

JPH0334564U -

Info

Publication number: JPH0334564U
Application number: JP9421989U
Authority: JP
Priority date: 1989-08-10
Filing date: 1989-08-10
Publication date: 1991-04-04

Description

[Brief explanation of drawings]

第１図ないし第７図は本考案の１実施例を示し
、第１図は冷媒回路図、第２図は制御ブロツク図
、第３図は制御フローチヤート、第４図は偏差Ｅ
ｓｈのメンバーシツプ関数を示す線図、第５図は
偏差Ｅｓｃのメンバーシツプ関数を示す線図、第
６図はフアジイテーブル、第７図は制御比率ｙの
メンバーシツプ関数を示す線図である。第８図及
び第９図は従来のヒートポンプの１例を示し、第
８図は冷媒回路図、第９図は圧縮機周波数と膨張
弁開度との関係を示す線図である。圧縮機……１、凝縮器……２、電子膨張弁……
３、蒸発器……４、コントローラ……２０、過熱
度算出手段……２２、過冷却度算出手段……２５
、ＰＩＤ演算器……２８，２９、フアジイ演算手
段……３０〜３８、弁開度決定手段……３９。 Figures 1 to 7 show one embodiment of the present invention, where Figure 1 is a refrigerant circuit diagram, Figure 2 is a control block diagram, Figure 3 is a control flowchart, and Figure 4 is a deviation E.
FIG. 5 is a diagram showing the membership function of deviation Esc, FIG. 6 is a fuzzy table, and FIG. 7 is a diagram showing the membership function of control ratio y. 8 and 9 show an example of a conventional heat pump, FIG. 8 is a refrigerant circuit diagram, and FIG. 9 is a diagram showing the relationship between compressor frequency and expansion valve opening degree. Compressor...1, Condenser...2, Electronic expansion valve...
3. Evaporator...4, Controller...20, Superheat degree calculation means...22, Supercooling degree calculation means...25
, PID computing unit...28, 29, fuzzy computing means...30-38, valve opening degree determining means...39.

Claims

[Claims for Utility Model Registration] A heat pump equipped with a compressor, a condenser, an electronic expansion valve, and an evaporator, comprising: a degree of superheat calculation means for calculating the degree of superheat of a refrigerant at the outlet of the evaporator; A supercooling degree calculating means for calculating the degree of supercooling of the refrigerant, a PID calculating means for calculating the valve opening degree output corresponding to the calculated degree of superheating and the degree of supercooling, and the above-mentioned degree of supercooling from the degree of superheating and the degree of subcooling. An electronic expansion valve comprising: fuzzy calculation means for fuzzy calculating a control ratio of two valve opening outputs; and valve opening determining means for determining the opening of the electronic expansion valve from the two valve opening outputs and the control ratio. A heat pump characterized by comprising a feedback control circuit.