Hermetic compressor and equipment including the hermetic compressor

Abstract

The present invention provides an enclosed compressor capable of uniformly supplying lubricating oil to the inner peripheral surface of the cylinder barrel and the outer peripheral surface of the piston and increasing the holding force of the lubricating oil after the supply, and an apparatus including the hermetic compressor. The closed type compressor includes a piston reciprocating in the axial direction on the top dead center side and the bottom dead center side, the piston having a groove surrounding a hole provided with a piston pin, wherein the groove is provided with a groove located on the upper end of the hole Is connected to the end of the top dead center side and the end side of the end side and the end side of the bottom dead center side of the top dead center side, And the second link boundary of the other end side of the other end side and the bottom dead center side of the top dead center, and the axial length of the connecting boundary or the second connecting boundary is equal to or greater than the axial length of the hole, The connecting boundary or the second connecting boundary has a straight line substantially parallel to the axial direction.

Description

technical field [0001] The present invention relates to a hermetic compressor and a device including the hermetic compressor. Background technique [0002] In small-capacity hermetic compressors used in household refrigerators, there is a growing demand for energy-saving refrigerators, and low-speed operation of compressors controlled by inverters has been achieved. Therefore, further efficiency improvement and reliability improvement of a sliding part at the time of low-speed operation of the hermetic-type compressor for refrigerators are demanded. [0003] Patent Document 1 describes that at least in the vicinity of the bottom dead center and in the portion communicating with the space in the closed container, the shape of the groove after planar development is a shape that does not form a parallel line with the piston axis (claim 1, image 3 ). [0004] prior art literature [0005] Patent Document 1: Japanese Patent Laid-Open No. 2006-169998 [0006] In Patent Documen...

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Problems solved by technology

[0006] In Patent Document 1, the shape of the grooves formed on the upper and lower sides of the outer circumference of the piston is a roughly half-moon shape protruding toward the skirt side of the piston, and the curvature ratio of the portion protruding toward the skirt side is equal to The curvature of the arc connecting the top side of the piston is small, so that sufficient lubricating oil cannot be supplied to the sliding surface of the skirt side of the piston, and the lubricity of the sliding part between the piston and the cylinder may decrease.

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