Control valve for variable displacement compressor

A technology of positive displacement compressor and control valve, applied in the field of control valve, can solve problems such as oscillation

Inactive Publication Date: 2006-03-08
TGK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, the high-sensitivity variable displacement compressor has a problem of being sensitive to rapid changes in discharge pressure Pd and suction pressure Ps due to sudden changes in engine speed, which causes oscillations

Method used

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  • Control valve for variable displacement compressor
  • Control valve for variable displacement compressor
  • Control valve for variable displacement compressor

Examples

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Embodiment Construction

[0022] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0023] 1 is a central longitudinal sectional view schematically showing a control valve for a variable displacement compressor according to a first embodiment of the present invention.

[0024] The control valve 11 includes: a pressure sensing portion 12 which senses a rapid change in the discharge pressure Pd; a valve portion 13 which senses the pressure difference (Pd-Ps) between the discharge pressure Pd and the suction pressure Ps, thereby controlling the The flow rate of refrigerant flowing from the discharge chamber into the crankcase; and the solenoid 14, which can be set from the outside to a predetermined value to which the differential pressure (Pd-Ps) is controlled by the control valve, are along the arranged on the same axis.

[0025] The main body 15 including the pressure sensing part 12 and the valve part 13 has a cylinder 16 formed in it...

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Abstract

A valve section of a control valve controls the flow rate between a discharge chamber and a crankcase, based on the differential pressure between discharge pressure Pd and suction pressure. A pressure-sensing section is provided in a high-pressure port. When a pressure-sensing piston having a pressure-receiving area larger than a valve element is exposed to a rapid discharge pressure change, the differential pressure generated between the discharge pressure and a pressure in a pressure-adjusting chamber acts on the valve element opposite to the valve-opening/closing direction, to temporarily retard the motion of the valve element which opens or closes by the differential pressure. Even a high-sensitivity variable displacement compressor promptly restores without hunting to a predetermined discharge capacity.

Description

technical field [0001] The present invention relates to a control valve for a variable displacement compressor, and more particularly to such a control valve for a variable displacement compressor installed in a variable On positive displacement compressors, it is used to control the discharge capacity of the compressor by the pressure difference between the discharge pressure and the suction pressure. Background technique [0002] A compressor used in a refrigerating cycle of an automobile air conditioner is used to compress refrigerant, and the compressor uses an engine as a driving source, and thus cannot perform rotational speed control. In order to eliminate this inconvenience, a variable displacement type compressor that can change the refrigerant compression capacity is used so as to obtain sufficient cooling capacity regardless of the engine speed. [0003] In this variable displacement compressor, a wobble plate mounted on a shaft driven by an engine has a compress...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B49/00F04B27/14F25B1/02
Inventor 广田久寿
Owner TGK
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