Displacement control valve for use in a variable displacement compressor

(19)

(11)

EP 0 908 624 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	08.09.1999 Bulletin 1999/36

(43)	Date of publication A2:
	14.04.1999 Bulletin 1999/15

(21)	Application number: 98118877.4

(22)	Date of filing: 06.10.1998

(51)	International Patent Classification (IPC)⁶: F04B 27/18

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
	Designated Extension States:
	AL LT LV MK RO SI

(30)

Priority:

06.10.1997 JP 272972/97

(71)	Applicant: SANDEN CORPORATION
	Isesaki-shi Gunma-ken (JP)

(72)	Inventors:
	Terauchi, Kiyoshi, Sanden Corporation Isesaki-shi, Gunma 372 (JP) Taguchi, Yukihiko, Sanden corporation Isesaki-shi, Gunma 372 (JP) Ogura, Toshiyuki, Sanden Corporation Isesaki-shi, Gunma 372 (JP)

(74)	Representative: Prüfer, Lutz H., Dipl.-Phys. et al
	PRÜFER & PARTNER GbR, Patentanwälte, Harthauser Strasse 25d 81545 München 81545 München (DE)

(54)	Displacement control valve for use in a variable displacement compressor

(57) In a displacement control valve (10) for use in a variable displacement compressor, a valve casing (11) defines a communication passage (17) for communicating a discharge chamber (52) with a crank chamber (43) to conduct gas from the discharge chamber to the crank chamber. A valve member (18) is coupled to said communication passage and movable between a open position and a close position in a predetermined direction. The valve member is biased towards the open position on expansion of a pressure sensitive member (12) which causes the expansion in the predetermined direction in response to a pressure in at least one of the suction chamber and the crank chamber. The pressure sensitive member is movable in relation to the valve casing in the predetermined direction. A spring (14) urges the pressure sensitive member in the predetermined direction to make the pressure sensitive member urge the valve member towards the open position.

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