Variable capacity scroll compressor

a compressor and variable capacity technology, applied in the field of scroll compressors, can solve the problems of deteriorating the overall operation efficiency of the system, difficult to ensure the reliability of frictional parts, and the most disadvantageous condition

Inactive Publication Date: 2005-01-27
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0015] An object of the present invention is to provide a variable capacity scroll compressor that can vary a compression capacity using a bypass function in a state where a compressor motor rotates at a constant RPM.
[0016] An

Problems solved by technology

In an actual operation of the compressor, a condition needing a small compression volume (ex. cooling operation of air conditioner) not the most disadvantageous condition exists too.
Thus, when the compressor having a large compression volume is selected considering the worst condition, the compres

Method used

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second embodiment

[0086]FIG. 7 shows a scroll compressor according to the present invention.

first embodiment

[0087] As shown in the drawing, the scroll compressor of this embodiment is identical to that of the first embodiment except for a connection structure around the control valve.

[0088] That is, a control passage 52, a control valve 53, and a high-pressure passage 51 are same as those in the first embodiment. However, the low-pressure passage 27 that is selectively connected to the control passage by the control valve in the first embodiment is not formed in this embodiment.

[0089] When the low-pressure passage 27 is not formed, the low-pressure of the intake passage 22 is not applied to the control passage 52 even when the control valve 53 moves downward in the drawing.

[0090] At this point, since internal pressure of the control passage 52 is lower than medium-pressure of fluid being compressed in the scroll compressor, the check valve 25 can be opened. This is because in a state that the control valve 53 is closed and high-pressure fluid is not continuously supplied, some air leaka...

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Abstract

Disclosed is a variable capacity scroll compressor including one or more bypass ports formed in a compression space, the bypass port being manipulated by intake/exhaust pressure of the compressor to control compression volume in multi-stages.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a scroll compressor, and more particularly, to a variable capacity scroll compressor, which is configured to vary an exhaust capacity of the compressor in multi-stages. Further, this invention is directed to a variable capacity scroll compressor, which is configured to vary an exhaust capacity of the compressor in multi-stages by a simple implemental construction. [0003] 2. Description of the Related Art [0004] Generally, a cooling system is applied to an air conditioner or a refrigerator to lower the temperature of an enclosed space by absorbing and discharging heat using refrigerant circulating a cooling cycle. [0005] Such a cooling system is configured to perform a series of cycles of compression, condensation, expansion and vaporization of refrigerant. A scroll compressor is used to perform the compression cycle among the series of cycles. [0006] Since the scroll compressor is di...

Claims

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Application Information

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IPC IPC(8): F04C18/02F04C28/26
CPCF04C28/26F04C18/0215F04C18/02
Inventor SHIN, DONG KOOPARK, HONG HEEKIM, CHEOL HWAN
Owner LG ELECTRONICS INC
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