Linear compressor and method for manufacturing a linear compressor

Abstract

A linear compressor and a method for manufacturing a linear compressor are provided. The linear compressor comprises a piston inserted into a cylinder and reciprocating within the cylinder. A piston of a linear compressor may include a surface treatment body made of aluminum or an aluminum alloy; a first surface treatment provided on an outer surface of the surface treatment body by a first vacuum deposition process; and a second surface treatment provided on an outer surface of the first surface treatment by a second vacuum deposition process.

Description

technical field [0001] The present invention relates to a linear compressor and a method of manufacturing the same. Background technique [0002] The cooling system refers to a system in which a refrigerant circulates and generates cold air, which repeatedly performs compression, condensation, expansion, and evaporation processes of the refrigerant. To this end, the cooling system includes: a compressor, a condenser, an expansion device and an evaporator. In addition, the cooling system may be installed in a refrigerator or an air conditioner as a home appliance. [0003] Generally speaking, a compressor (Compressor) is a mechanical device that receives power transmitted from a power generating device such as an electric motor or a turbine, and compresses air or refrigerant or other working gases to increase its pressure. Compressors are widely used in such household appliances or in the entire industrial field. [0004] Such compressors can be roughly divided into recipr...

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Problems solved by technology

[0024] Therefore, in the case of manufacturing a linear compressor using the manufacturing method of the prior document 2, the first process is performed after the outer shape of the piston is manufactured, and then it is packaged and transferred to a company for the second process at a cost of logistics. Therefore, there are inconveniences in actual operation

Furthermore, the first process requires relatively high costs

As a result, there is a problem that the manufacturing cost of the linear compressor becomes high

[0025] In addition, according to the manufacturing method of the prior document 2, after the first process is performed, a step of grinding the surface of the buffer portion with a relatively large roughness is required, so that the manufacturing cost is correspondingly increased. If there is a defect in the grinding process, the desired surface treatment performance of the piston cannot be achieved

[0026] If the surface treatment performance of the piston is not well realized, in the drive of the linear compressor, especially when the initial start-up of the linear compressor cannot fully exert the performance of the gas bearing, there will be a gap between the piston and the cylinder. friction, which causes the piston to be worn

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