Variable displacement compressor

Abstract

Disclosed is a variable displacement compressor having improved compressor performance such as reduced pulsation and improved durability and resistance to pressure and allowing smooth and high-precision control by using an axial movement member to set the swash plate tilt angle to match a target tilt angle. The variable displacement compressor is provided with a cylinder head in which are formed a suction chamber and a discharge chamber, a cylinder block having a cylinder bore such that an inserted piston is capable of reciprocating movement, a crankcase formed by said cylinder block and a front housing, a swash plate that is rotated with the main shaft and that is disposed inside said crankcase and held so that the tilt angle can be changed relative to said main shaft, and a movement conversion mechanism for converting the rotational movement of said swash plate to the reciprocating movement of a piston, wherein: the suction path for the intake of a suction gas into the compressor is constituted to open into the crankcase; a connecting path for connecting the crankcase and the suction chamber is provided in the cylinder block; around the periphery of the main shaft, an axial movement member is provided that can move along the axis of the main shaft in an essentially one-to-one correspondence with the tilt angle of the swash plate; said axial movement member is disposed such that one end is exposed to the pressure of the crankcase, and the other end is exposed to a pressure between that of the suction chamber and that of the discharge chamber; and an intermediate pressure control mechanism that can control the intermediary pressure is also provided.

Description

technical field [0001] The present invention relates to a variable displacement compressor, and in particular, to a compressor capable of reducing pulsation, improving durability and pressure resistance, and controlling a swash plate more smoothly and with high precision by an axially moving member. Variable capacity compressor with inclination angle. Background technique [0002] A variable capacity compressor is known, which includes: a cylinder head formed with a suction chamber and a discharge chamber; a cylinder block having a cylinder bore capable of reciprocating insertion of a piston; a crank chamber formed by the cylinder block and a front casing; Arranged in the crank chamber, a swash plate that rotates with the main shaft and is supported so that its inclination angle can change relative to the main shaft; and a motion converting mechanism that converts the rotational motion of the swash plate into the reciprocating motion of the piston. [0003] In addition, as ...

AI Technical Summary

Problems solved by technology

However, in these prior arts, the axially moving member of the present invention described later is not disclosed, and the pressure of the crank chamber is applied to one end side of the axially moving member, and the pressure between the discharge pressure and the suction pressure is applied to the other end side of the axially moving member. The structure of the intermediate pressure, the structure and technical idea of ​​controlling the intermediate pressure, so the control of the present invention cannot be carried out

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