Piston assembly for linear compressor

Abstract

The invention discloses a piston assembly for a linear compressor. The piston assembly comprises an air suction valve block, connecting pipes, a piston cover, a connecting plate and a middle block, wherein the piston cover is of a hollow cylindrical structure; the air suction valve block is arranged in the piston cover; the middle block is arranged inside the [piston cover; in addition, one end ofthe middle block is closely fitted with the end face of a second cylinder of the air suction valve block; the other end of the middle block is connected with one end of the connecting plate; the other end of the connecting plate is connected with one end of each connecting pipe; the connecting plate, the connecting pipes and the middle block are all internally provided with channels for gases tocirculate; the channels are communicated after the connecting plate, the connecting pipes and the middle block are connected; and the channel of the middle block is communicated with the opening and closing parts of the air suction valve block. As the air suction valve block is arranged in the piston cover, a first cylinder of the air suction valve block is embedded into a flange of the piston cover; and in addition, the end face of the first cylinder of the air suction valve block is coplanar with the flange end face of the piston cover, so that the problems of clearance volume and the like are avoided.

Description

technical field [0001] The invention relates to the field of compressors, in particular to a piston assembly for a linear compressor. Background technique [0002] In refrigeration equipment such as refrigerators and freezers, linear compressors are often used. The linear compressor sucks the refrigerant gas into the cylinder, and uses the driving force of the linear motor to drive the piston to reciprocate linearly in the cylinder, thereby compressing the refrigerant gas. Finally, the refrigerant in the compressed state is discharged to the condenser. The piston of the linear compressor needs to be provided with an intake channel, and the suction valve is installed on the end surface of the piston. The traditional method is to fix the suction valve plate on the end face of the piston by screws, the screws protrude from the suction valve plate, and the exhaust valve plate corresponding to the screw should have a screw relief hole, but the existence of the relief hole increas...

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Problems solved by technology

[0004] The object of the present invention is a piston assembly for a linear compressor. The technical problem to be solved is to fix the suction valve plate on the outer end surface of the piston by screw connection, which brings about the problem of increasing the clearance volume, or the suction valve plate is fixed by welding. It is fixed on the outer end surface of the welding column, and the welding column is fixed by a spring. Due to the existence of welding deformation, after a long time of work, the connection of the suction valve plate is broken, or due to the welding process, the end surface of the suction valve plate and the outer end surface of the piston Not parallel, after the spring works for a long time, the spring will fail, resulting in the reduction of the displacement of the compressor and the long-term working efficiency

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