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Patent Searching and Data


Title:
DISPLACEMENT CONTROL VALVE FOR VARIABLE DISPLACEMENT COMPRESSOR
Document Type and Number:
Japanese Patent JP2004137980
Kind Code:
A
Abstract:

To provide a displacement control valve for a variable displacement compressor capable of efficiently returning lubrication oil in a refrigerant to a crank chamber with simple structure.

A valve element 2 is disposed in a refrigerant passage which communicates a delivery chamber of the variable displacement compressor and the crank chamber so as to seat on from the crank chamber, and opens/closes the refrigerant passage. A valve seat 5a seated by the valve element 2 and a valve hole 5 are formed along with a through-hole 6 as a communication passage communicating the delivery chamber side and the crank chamber side in a valve seat forming member 3. When a solenoid part is driven and the valve element 2 is pressed to a piston rod 8 to become a closed state, the refrigerant from the delivery chamber side flows into the crank chamber side through the through-hole 6. The lubrication oil can be returned into the variable displacement compressor even the valve element 2 is closed thereby.


Inventors:
NAKAZAWA TOMOKAZU
Application Number:
JP2002000303998
Publication Date:
May 13, 2004
Filing Date:
October 18, 2002
Export Citation:
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Assignee:
TGK CO LTD
International Classes:
F04B27/14; F04B27/10; F04B27/18; (IPC1-7): F04B27/14
Attorney, Agent or Firm:
服部 毅巖