Variable-displacement swash-plate compressor

(19)

(11)

EP 0 857 872 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	13.01.1999 Bulletin 1999/02

(43)	Date of publication A2:
	12.08.1998 Bulletin 1998/33

(21)	Application number: 98102453.2

(22)	Date of filing: 12.02.1998

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

(84)	Designated Contracting States:
	AT BE CH 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:

12.02.1997 JP 27522/97

(71)	Applicant: Sanden Corporation
	Isesaki-shi, Gunma 372-8502 (JP)

(72)	Inventor:
	Fujita, Masaaki 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)	Variable-displacement swash-plate compressor

(57) A variable-displacement swash-plate compressor comprising a cylinder housing (101) having a plurality of cylinder bores (122) and a crank chamber (110) in which a swash plate (113) is disposed to be coupled to a drive shaft (109) with a variable slant angle for driving pistons (123) slidably fitted into the cylinder bores (122), a cylinder head mounted on the cylinder housing (101) and having a suction chamber (132) and a discharge chamber (133) selectively connected to the cylinder bores (122), and a crank chamber pressure control system for controlling an inner pressure of the crank chamber (110) to control the slant angle of the swash plate (113) to thereby control a fluid displacement volume of the compressor, by detecting the crank chamber pressure by use of a pressure detector (142) disposed in a pressure detecting chamber (140) formed in the cylinder head (131) and communicating with the crank chamber (110) through a communicating path (156). In order to simplify provision of the communicating path, a communicating member (155) having a through hole (156) extending therethrough is assembled to be disposed bridging between the cylinder housing (100) and the cylinder head (131), the through hole providing the communicating path to communicate the crank chamber (110) with the pressure detecting chamber (140).

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