Variable capacity compressor

Abstract

The invention provides a variable capacity compressor, which can prevent discharge rate from suddenly dropping to zero in a low discharge capacity region to the maximum and can stably maintain the inclination angle of a swash plate. The variable capacity compressor (1) connects a rotor (11) fixed on a drive shaft (4) and a shaft journal (13) by means of a connecting bar (14). The connecting bar (14) rotates and centers around the rotor (11). The rotation can simultaneously change the inclination angles of the shaft journal (13) and the swash plate (15). The reciprocating stroke of each piston (9) can be changed according to the inclination angle of the swash plate (15). The connecting bar (14) and the rotor (11) are connected at a first rotary fulcrum portion (14a) and the connecting bar (14) and the shaft journal (13) are connected at a second rotary fulcrum portion (14b) so that the first rotary fulcrum portion (14a) is positioned at the side of the shaft journal (13) and the second rotary fulcrum portion (14b) is positioned at the side of the rotor (11).

Description

technical field [0001] The present invention relates to a variable capacity compressor which can change the discharge capacity of a piston by utilizing the inclination angle of a swash plate. Background technique [0002] As such a conventional variable capacity compressor, there is a compressor disclosed in Patent Document 1. As shown in FIG. [0003] As shown in FIG. 5 , this variable capacity compressor 100 has a casing 101 . The housing (housing) 101 is mainly composed of a cylinder block 101a, a front head portion (front head) 101b disposed on one end side of the cylinder block 101a, and a rear head portion (front head) disposed on the other end side of the cylinder block 101a via a valve plate 102. rear head) 101c assembled. [0004] A drive shaft 103 is disposed at the center of the housing 101 . Both ends of the drive shaft 103 are rotatably supported by the housing 101 via radial bearings 104 and 105 . [0005] In the cylinder block 101a, a plurality of cylinder...

AI Technical Summary

Problems solved by technology

Also, as the approach to the minimum capacity increases the end gap, the stroke naturally decreases, so the ratio of the dead volume to the discharge capacity increases sharply, and at a certain swash plate angle Phenomenon in which the discharge flow rate from the cylinder chamber 106 drops sharply to zero

The low discharge capacity area originally refers to an unstable area in which the discharge flow rate is small. Therefore, when the discharge flow rate undergoes such a sudden change, there is a problem that the inclination angle of the swash plate 113 cannot be stably maintained.

Images