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Patent Searching and Data


Title:
CONTROL VALVE FOR VARIABLE CAPACITY COMPRESSOR
Document Type and Number:
WIPO Patent Application WO/2004/059166
Kind Code:
A1
Abstract:
A control valve for a variable capacity compressor has a valve hole (45) that penetrates between a discharge pressure-introducing port (42) penetrating to a discharge chamber (27) and a pressure-supplying port (43) penetrating to a crank chamber (6); a valve body (34) for regulating the opening of the valve hole (45); a pressure-sensing chamber (51b) that penetrates to a suction chamber (26); a pressure-sensing portion that acts in accordance with the pressure of a fluid introduced in the pressure-sensing chamber (51b) and, when the fluid pressure is reduced, urges the valve body (34) in a direction to increase the opening of the valve hole (45); a solenoid portion that reduces, when a solenoid (38) is excited , the urging force that increases the opening of the valve body (45); and a valve-closing spring (47) that urges the valve body (34) in a direction to reduce the opening of the valve body (34). The pressure-sensing portion is provided inside the solenoid portion. Conical faces that incline at a predetermined angle with respect to a flat face perpendicular to the axis of the valve may be formed on opposite faces of a plunger (35) and a fixed attraction element (52). The axial dimension of the control valve used for a variable capacity compressor is reduced, so that the control valve and furthermore the compressor is downsized. Further, disadvantages caused by such downsizing can be eliminated.

Inventors:
KAZAHAYA YUKIO (JP)
SEKINE AKIYOSHI (JP)
Application Number:
PCT/JP2003/014432
Publication Date:
July 15, 2004
Filing Date:
November 13, 2003
Export Citation:
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Assignee:
ZEXEL VALEO CLIMATE CONTR CORP (JP)
KAZAHAYA YUKIO (JP)
SEKINE AKIYOSHI (JP)
International Classes:
F04B27/18; (IPC1-7): F04B27/18
Foreign References:
EP1247981A22002-10-09
EP1256718A22002-11-13
EP1316726A22003-06-04
JPH0727049A1995-01-27
Attorney, Agent or Firm:
Onuki, Kazuyasu (8-8 Shibuya 1-chom, Shibuya-ku Tokyo, JP)
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