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Control valve for variable displacement compressor

A technology of volumetric compressors and control valves, which is applied in the direction of liquid variable displacement machinery, variable displacement pump components, mechanical equipment, etc., and can solve the problems of damage to axial slidability, valve elements cannot move smoothly, etc.

Inactive Publication Date: 2006-04-19
TGK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the second plunger is moved in the axial direction by the attractive force generated by the solenoid on the second plunger, the second plunger is inclined according to the state of the spring pushing the second plunger in the axial direction, thereby A couple of forces act on the shaft held in the main body, which significantly damages the axial slidability of the shaft so that the valve element cannot move smoothly

Method used

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

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Embodiment Construction

[0023] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0024] figure 1 is a central longitudinal sectional view of the structure of a control valve for a variable displacement compressor according to the present invention.

[0025] The control valve is provided with valve sections such as figure 1 shown in the upper part of . The valve portion includes a main body 11 formed with a side opening communicating with the discharge chamber of the variable displacement compressor to form a port 12 for receiving the discharge pressure Pd from the discharge chamber. Port 12 has a filter 13 fixed on its periphery. The port 12 for receiving the discharge pressure Pd communicates with the port 14 opened at the top of the main body 11 through a refrigerant passage formed through the inside of the main body 11 . Port 14 communicates with the crankcase of the variable displacement compressor, thereby delivering ...

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Abstract

The invention provides a control valve for a variable displacement compressor improving sliding nature of shaft transmitting change of suction pressure to a valve element and improving controllability. In the control valve for the variable displacement compressor of a structure dividing a plunger of a solenoid into two of a first plunger and a second plunger and having a diaphragm sensing suction pressure Ps arranged therebetween, the second plunger is retained by a spring energizing the same in a direction separating from the diaphragm and is made abut on a shaft transmitting change of suction pressure Ps sensed by the diaphragm to the valve element. Consequently, since couple of force does not act on the shaft and nature of sliding is not deteriorated even if attraction force is generated and the second plunger 22 moves, controllability can be improved.

Description

technical field [0001] The present invention relates to a control valve for a variable displacement compressor, in particular to such a control valve for a variable displacement compressor suitable for controlling a variable displacement compressor for an automobile air conditioner refrigerant emissions. Background technique [0002] A compressor used in a refrigeration cycle of an automobile air conditioner is driven by an engine whose rotational speed changes according to the driving conditions of the vehicle, so rotational speed control cannot be performed. Based on this, a variable-volume compressor capable of changing the refrigerant discharge is usually used so as to obtain sufficient refrigeration capacity without being limited by the engine speed. [0003] In the variable displacement type compressor, generally, a swash plate is arranged in a crankcase formed airtightly so that its inclination angle can be varied, and the swash plate is driven by the rotational moti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B27/14
CPCF04B2027/1854F04B2027/1813F04B2027/1827F04B2027/1859F04B27/1804F04B27/14F04B39/10
Inventor 小山克己梶原盛光河口武
Owner TGK
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