Compressor

Abstract

A piston type compressor having a drive plate (swash plate), wherein sliding friction between the drive plate and shoes is reduced and the compressor is made smaller by slidably attaching the shoes engaged with spherical ends of pistons to a shoe holding plate formed with guide grooves in the radial direction and supporting the shoe holding plate by the drive plate through a thrust bearing. The drive plate is connected to an arm of the shaft side through a double slide link mechanism to enable it to be supported by only a front end of the front housing.

Description

technical field [0001] The present invention relates to fluid compressors such as refrigerant compressors used in refrigeration cycles of air conditioners mounted on vehicles, for example. Background technique [0002] There are two representative forms of conventional drive disk piston (or swash plate) compressors. One form is that it is installed on the front and back sides of the drive disc that rotates and swings on the drive shaft relative to the tilted state, and the two hemispherical shoes installed at the end of the piston rod are in direct frictional contact, so that the piston directly For reciprocating motion. The problem with this type of compressor is that when the compressor rotates at high speed, the relative sliding speed between the drive disc and the shoe is high, and the lubrication state between the drive disc and the shoe is not good under the operating condition of insufficient lubricating oil supply. , prone to poor adhesion. In addition, since the ...

AI Technical Summary

Problems solved by technology

The first reason is that it is desired to install the capacity control valve 33 inside the compressor, but there is no space inside the compressor to accommodate the capacity control valve 33

The second reason is that the capacity control valve 33 accommodates both the low-pressure fluid of the suction chamber 31 and the high-pressure fluid of the discharge chamber 32 to generate any pressure between those high and low pressures, which is supplied to the driving disc chamber 1a, and therefore, if When the capacity control valve 33 is installed on the rear frame 3 provided with the suction chamber 31 and the discharge chamber 32, the connecting flow path becomes short and the structure is simple.

The third reason is that if the capacity control valve 33 is located on parts other than the rear frame 3 such as the periphery of the cylinder block 2, the radial dimension of the compressor frame at the position of the capacity control valve 33 protrudes greatly, and the entire compressor Large volume makes it difficult to form a fluid circuit

In addition, because the sleeve 36 is a part that uses the cylindrical coil 34 to make the valve core 35 work, it must be a material that can effectively pass the magnetic flux, but it is very difficult to meet all these requirements. , the magnetic efficiency is reduced, or the structure is complicated

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