Rotary compressor and heat pump system

a compressor and heat pump technology, applied in the field of rotary compressors, can solve the problems of increasing the temperature of the compressor, reducing the capacity and efficiency of the compressor, and reducing the volume of intake refrigerant, so as to achieve the effect of ensuring the reliability of the compressor, improving the efficiency of the compressor, and low cos
US20080078191A1Inactive Publication Date: 2008-04-03FUJITSU GENERAL LTD
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
FUJITSU GENERAL LTD
Publication Date
2008-04-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

A problem to be solved by the present invention is that the temperature of a refrigerant discharged from a compression section can be detected more exactly without being influenced by variable factors existing around the compression section. In a rotary compressor 1 having a motor 6 and a compression section 3 provided in a closed container 2, and also having a discharge pipe 26 provided in an upper part of the closed container 2 to discharge a refrigerant compressed by the compression section 3 to the outside of the closed container 2, a refrigerant discharge part 462 for discharging the refrigerant compressed by the compression section 3 toward the inner peripheral surface of the closed container 2 is provided, and a discharge temperature sensor 20 for detecting the discharge temperature of compressed refrigerant is arranged in a portion opposed to the refrigerant discharge part 462 on the outer peripheral surface side of the closed container 2.
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Description

TECHNICAL FIELD

[0001] The present invention relates to a rotary compressor used for air conditioners and water heaters. More particularly, it relates to a technique used to control the capacity of a heat pump system and to ensure the reliability of a compressor by exactly detecting the discharge temperature of a refrigerant compressed by a compression section.BACKGROUND ART

[0002] The compressor used for the refrigeration cycle of a heat pump system has a problem in that if the degree of superheat of the intake refrigerant thereof is too high, the density of intake refrigerant decreases, so that the capacity and efficiency of compressor decreases, and a problem in that the temperature of the whole of the compressor rises, so that the reliability of compressor, especially the durability of motor winding and insulating paper, decreases.

[0003] On the other hand, if the intake refrigerant is not in a superheated state but in a wet state, that is, in a state in which the ratio of liquid is h...

Claims

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