Piston assembly, compressor and refrigeration equipment

Abstract

The invention provides a piston assembly, a compressor and refrigeration equipment. The piston assembly comprises a piston body, a plunger, an elastic piece and a cam, wherein a sliding way penetrating in the axial direction is formed in the first end of the piston body, the plunger is arranged in the slide way in a sliding mode, an expansion cavity is defined by the end face of the plunger and the inner wall of the slide way, when the plunger slides in the slide way, the volume of the expansion cavity can be increased or decreased, the elastic piece is arranged in the piston body, when the elastic piece pushes the plunger to move in the first direction, the volume of the expansion cavity is increased, the cam is rotatably arranged in the piston body through a piston pin, and when the cam rotates to push the plunger to move in the second direction opposite to the first direction, the volume of the expansion cavity is reduced. According to the piston assembly, the piston structure is changed, the expansion cavity is formed by the slide way and the plunger, and in the operation process of the compressor, the piston structure is changed, so that the beneficial effects that the cylinder hole suction volume is increased, the suction capacity is increased, the displacement is increased, and the refrigerating capacity of the compressor is improved are achieved.

Description

technical field [0001] The invention relates to the technical field of compressors, in particular to a piston assembly, a compressor and refrigeration equipment. Background technique [0002] In the refrigeration piston compressor industry, compressor miniaturization and large displacement are one of the future trends in this industry. Small-scale refrigeration and heating systems often need to match small piston compressors, but small piston compressors are often limited in application due to their small displacement; however, the increase in the displacement of conventional compressors requires an increase in the inner diameter and wall thickness of the cylinder bore , increasing the overall size and weight of the cylinder block and then increasing the overall size of the compressor is not conducive to the development trend of compressor miniaturization, and it is more difficult to expand the displacement of small compressors. Contents of the invention [0003] In view ...

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Problems solved by technology

[0003] In view of this, the present invention provides a piston assembly, a compressor and a refrigeration device, at least for solving the difficulty in expanding the displacement of the compressor existing in the prior art technical issues, specifically:

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