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Line fed permanent magnet synchronous type motor for scroll compressor with bypass ports

A scroll compressor and electric motor technology, applied in the field of scroll compressors, can solve problems such as reduced efficiency

Inactive Publication Date: 2010-02-03
SCROLL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Induction motors have peak efficiency at a certain load torque, above which and below which efficiency decreases

Method used

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  • Line fed permanent magnet synchronous type motor for scroll compressor with bypass ports

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Experimental program
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Embodiment Construction

[0009] figure 1 A scroll compressor 20 is shown in . As shown, the motor stator 22 causes the motor rotor 23 to rotate. When the rotor 23 rotates, the shaft 24 is driven to rotate. Shaft 24 causes orbiting scroll member 26 to orbit relative to non-orbiting scroll member 28, as is known. The components described here are housed within a housing 30 . The suction pipe 32 receives suction refrigerant from the refrigeration cycle, and delivers the refrigerant to a compression chamber between the orbiting scroll member 26 and the non-orbiting scroll member 28 . Discharge pipe 34 delivers the compressed refrigerant downstream into the refrigeration cycle.

[0010] The bypass port 36 communicates with the compression chamber, and may return partially or completely compressed refrigerant to a suction pressure portion such as the suction pipe 32 . As shown, bypass line 38 incorporates valve 40 to selectively communicate the refrigerant back to the suction line. However, any other ...

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Abstract

A scroll compressor is provided with some capacity reduction technique such as a bypass port. The electric motor for driving the scroll compressor is not an induction motor, but rather a line fed permanent magnet synchronous motor is utilized. Such motors have a higher overall efficiency, and thus will be more efficient at reduced capacity operation.

Description

technical field [0001] The present invention relates to a scroll compressor having a line fed permanent magnet synchronous motor having a relatively constant power curve as the load varies, wherein the scroll compressor has a reduced capacity Features. Background technique [0002] Scroll compressors are being used extensively in refrigeration compressor applications. In a scroll compressor, each of a pair of scroll members has a base and a generally helical wrap extending from the base. The scroll teeth cooperate to define a compression chamber. An electric motor drives a shaft that rotates one of the two scroll members relative to the other scroll member through a non-rotating coupling. [0003] There are many improvements to the basic scroll compressor design. In a refinement, when the refrigeration system associated with the compressor needs to be reduced in capacity, the partially or fully compressed refrigerant may flow back to the suction pressure section to reduc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C18/02
CPCF04C18/0215F04C27/005F04C28/26F04C29/0085F04C18/02F04C29/00
Inventor G·W·哈恩
Owner SCROLL TECH