Linear compressor

Abstract

The invention discloses a linear compressor which comprises an exhaust mechanism and a compressor assembly. The exhausting mechanism comprises an exhaust valve disc, an exhaust valve plate, a pre-tightening spring and an exhaust cavity cover; the exhaust valve plate is arranged at the end part of a cylinder; both an exhaust hole and the exhaust valve disc are arranged on the exhaust valve plate; the exhaust cavity cover is fastened on the wall surface of the outer end of the cylinder to form a closed cavity which is used as an exhaust cavity of the compressor; the pre-tightening spring is arranged in the exhaust cavity. The linear compressor successfully solves the problem of a harsh result that when the linear compressor operates abnormally, a piston or the exhaust valve plate is damaged or both the piston or the exhaust valve plate are damaged due to cylinder collision. When the compressor operates normally, a pre-tightening force provided by the pre-tightening spring of the exhaust mechanism are sufficient to counteract a pressure applied to the exhaust valve plate by gas compression. The exhaust mechanism can effectively ensure operation stability of the compressor, guarantees service life of the compressor, is beneficial to regulation of a control system and ensures implementation of accurate control. The spring is additionally arranged, and thus, the size of the exhaust cavity is increased and exhaust noise can be reduced.

Description

technical field [0001] The invention relates to a linear compressor, in particular to an oil-free lubrication linear compressor for refrigerators. Background technique [0002] There are two types of reciprocating piston compressors. The crank connecting rod mechanism is the most common one at present. Due to the characteristics of many moving pairs, large friction loss, many parts, and large size of the reciprocating piston compressor using the crank connecting rod mechanism , Another linear compressor with a linear reciprocating structure has been paid more and more attention, especially in the application field of small cooling capacity such as refrigerators, the linear compressor has a simpler structure, reduces friction loss, reduces noise, and can be easily adjusted Voltage regulation of flow is simpler and more reliable than variable frequency regulation, and can achieve the advantages of less oil or oil-free lubricating oil. [0003] The intake and exhaust valves of...

AI Technical Summary

Problems solved by technology

Using lubricating oil to lubricate the moving parts can improve the reliability of the reciprocating piston compressor, is conducive to long-term work, and can also play a certain role in sealing, but there are also lubricating oil pumps and processing oil pipelines that make the compressor structure Complex, and the lubricating oil entering the refrigeration system will also affect the heat transfer of the heat exchanger and reduce the efficiency of the refrigeration system

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