US 12,345,246 B2
Variable-displacement swash plate type compressor
Yujiro Morita, Saitama (JP)
Assigned to Valeo Japan Co., Ltd., Saitama (JP)
Appl. No. 18/024,341
Filed by Valeo Japan Co., Ltd., Saitama (JP)
PCT Filed Aug. 27, 2021, PCT No. PCT/JP2021/031477
§ 371(c)(1), (2) Date Mar. 2, 2023,
PCT Pub. No. WO2022/050183, PCT Pub. Date Mar. 10, 2022.
Claims priority of application No. 2020-147452 (JP), filed on Sep. 2, 2020.
Prior Publication US 2024/0011480 A1, Jan. 11, 2024
Int. Cl. F04B 1/122 (2020.01); F04B 1/14 (2020.01); F04B 1/141 (2020.01); F04B 1/145 (2020.01); F04B 27/10 (2006.01)
CPC F04B 1/122 (2013.01) [F04B 1/14 (2013.01); F04B 1/141 (2013.01); F04B 1/145 (2013.01); F04B 27/10 (2013.01); F04B 27/1036 (2013.01); F04B 27/1081 (2013.01); F04B 27/109 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A variable-displacement swash plate type compressor comprising:
a cylinder block in which plural cylinder bores are formed;
a front housing assembled with a front side of the cylinder block and defining a crank chamber;
a rear housing that is attached to a rear side of the cylinder block and in which a suction chamber and a discharge chamber are formed;
a shaft supported in a rotatable manner by the front housing and a central hole formed in a center of the cylinder block;
a swash plate configured to rotate integrally with the shaft and attached at a variable inclination angle with respect to the shaft;
pistons that are disposed in the plural cylinder bores disposed around the central hole of the cylinder block and that are configured to reciprocate by rotation of the swash plate; an intake passage configured to allow the discharge chamber and the crank chamber to communicate with each other;
a pressure control valve disposed in the intake passage and configured to adjust an opening degree of the intake passage;
a first bleeding passage configured to allow the crank chamber and the suction chamber to constantly communicate with each other; and
a second bleeding passage configured to allow the crank chamber and the suction chamber to constantly communicate with each other,
wherein the first bleeding passage is configured to communicate with the crank chamber at least via a space defined by an insertion end portion of the shaft in the central hole, and
wherein the second bleeding passage is opened in an end surface of the cylinder block at a position that is opposed to the swash plate with respect to an axial direction defined by the shaft,
wherein the second bleeding passage comprises an axial end and an oblique end, where the axial end has a larger diameter than a diameter of the oblique end, positioned to couple together,
wherein the oblique end is positioned towards the swash plate and the axial end is positioned away from the swash plate, and
wherein the axial end comprises a filter.