Reciprocating compressor

A compressor and reciprocating technology, which is applied in the direction of compressors, liquid variable capacity machines, refrigerators, etc., can solve problems such as large vibrations, and achieve the effects of improving reliability and efficiency, reducing side pressure, and reducing vibration

Active Publication Date: 2007-01-31
PANASONIC APPLIANCES REFRIGERATION DEVICES SINGAPORE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the position of the center of gravity of the counterweight 8 disclosed in the aforementioned Japanese Patent Laid-Open No. 07-238885 may cause greater vibration due to the offset setting of the air cylinder 12 than when the air cylinder 12 is not offset.

Method used

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Examples

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Embodiment Construction

[0017] The reciprocating compressor of the present invention includes a hermetic container containing a compression element for compressing refrigerant gas. Compression elements consist of the following components:

[0018] a crankshaft arranged substantially vertically and having a main shaft portion and an eccentric portion;

[0019] forming a cylinder block of a cylindrical cylinder;

[0020] a piston reciprocating within the cylinder;

[0021] a connecting rod connecting the eccentric portion to the piston; and

[0022] A balance weight for balancing vibrations generated by the above-mentioned members including at least one of a piston, a connecting rod, and an eccentric portion.

[0023] The cylinder is offset so that its axis and the axis of the main shaft part do not cross each other, and the balance weight is arranged so that its center of gravity is positioned substantially opposite to the center of the eccentric part with respect to the axis of the main shaft part...

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PUM

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Abstract

The present invention relates to a highly reliable reciprocating compressor that operates efficiently using less energy and generates less vibration. The reciprocating compressor includes a crankshaft, a cylinder, a piston, a connecting rod and a balance weight. The cylinder is offset so that its axis does not intersect the axis of the main shaft portion. The center of gravity of the balance weight is disposed substantially opposite to the center of the eccentric portion with respect to the axis of the main shaft portion, and deviated in the rotational direction from a position just opposite to the center of the eccentric portion. The above structure allows reducing the side pressure of the piston, thereby improving the reliability and efficiency of the reciprocating compressor, and allowing the movement of the balance weight to eliminate unbalanced forces generated by the movement of the piston, the connecting rod, and the eccentric portion.

Description

technical field [0001] The present invention relates to how to reduce vibrations generated by reciprocating compressors. Background technique [0002] Due to the global environmental protection movement, there is an increasing demand for energy saving in household refrigerators. Under this trend, refrigerant compressors used in domestic refrigerators have adopted inverter technology to reduce the number of revolutions (rpm), that is, the technology enables the reciprocating compressor to operate at a lower number of revolutions. R600a gas, which has a lower greenhouse effect coefficient, has also started to be used as a refrigerant gas. These technological changes require that the cylinders in the refrigerant compressors have a larger capacity in order to maintain the cooling effect of the refrigerant. However, the large piston of the reciprocating compressor makes it difficult to suppress vibration due to the reciprocating motion of the piston to a low level. On the othe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B39/00F04B53/00F16F15/22F16F15/28
CPCF16F15/28F04B39/0094F16F15/22F04B39/122F04B39/0005F04B39/0022F04B9/045F25B31/00F05B2210/12F05B2210/14F05B2260/96
Inventor 窪田昭彦长尾崇秀坪井康祐垣内隆志
Owner PANASONIC APPLIANCES REFRIGERATION DEVICES SINGAPORE
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