CONTROL VALVE OF VARIABLE DISPLACEMENT COMPRESSOR - ZEXEL VALEO CLIMATE CONTR CORP

Title:

CONTROL VALVE OF VARIABLE DISPLACEMENT COMPRESSOR

Document Type and Number:

WIPO Patent Application WO/2004/065789

Kind Code:

A1

Abstract:

A control valve of a variable displacement compressor capable of improving compression efficiency by reducing the circulated amount of refrigerant in the variable displacement compressor, comprising a ball valve (11) controlling the flow rate of the refrigerant flowing from a delivery chamber to a crank chamber, a spool valve (12) controlling the flow rate of the refrigerant flowing from the crank chamber to a suction chamber, a diaphragm (13) sensing a suction pressure (Ps), and a solenoid (14) setting the suction pressure, wherein the spool valve (12) is formed so as to start flow rate control after the ball valve (11) is fully closed or nearly fully closed and the ball valve (11) is formed so as to start flow rate control after the spool valve (12) is minimally opened or nearly minimally opened. Because an area in which the ball valve (11) and the spool valve (12) are simultaneously opened can be almost eliminated when the flow rate controls of these valves are switched, the flow rate of the refrigerant circulating inside the variable displacement compressor and not contributing to freezing action can be minimized to increase the efficiency of the variable displacement compressor.

More Like This:

WO/2004/046549	CONTROL DEVICE FOR VARIABLE CAPACITY COMPRESSOR
JPH07310654	CLUTCHLESS SINGLE PISTON TYPE VARIABLE DISPLACEMENT COMPRESSOR
JPH04318291	VARIABLE DISPLACEMENT SWASH PLATE TYPE COMPRESSOR

Inventors:

KAWAMURA YUJI (JP)
KOWADA KAZUTAKA (JP)
IRIE KAZUHIRO (JP)
MUTA SHUNJI (JP)
SATO YOSHIE (JP)

Application Number:

PCT/JP2004/000505

Publication Date:

August 05, 2004

Filing Date:

January 21, 2004

Export Citation:

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Assignee:

ZEXEL VALEO CLIMATE CONTR CORP (JP)
KAWAMURA YUJI (JP)
KOWADA KAZUTAKA (JP)
IRIE KAZUHIRO (JP)
MUTA SHUNJI (JP)
SATO YOSHIE (JP)

International Classes:

F04B27/18; (IPC1-7): F04B27/08; F04B49/08

Foreign References:

JPS6441680A	1989-02-13
JPS63243469A	1988-10-11
JPS62240482A	1987-10-21

Other References: