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Control valve of variable compressor

A technology for controlling valves and compressors, which is applied in pump control, liquid variable capacity machinery, mechanical equipment, etc., and can solve problems such as compressor displacement change delays

Inactive Publication Date: 2004-02-11
TOYOTA IND CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, although the electric control adjusts the set suction pressure well, the displacement change of the compressor is delayed

Method used

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  • Control valve of variable compressor
  • Control valve of variable compressor
  • Control valve of variable compressor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The following will refer to the attached figure 1 -6 Describes the control valve of the variable displacement swash plate compressor used in the refrigeration cycle of the vehicle air conditioning system.

[0018] (variable swash plate compressor)

[0019] Such as figure 1 As shown, the variable variable swash plate compressor (hereinafter simply referred to as the compressor) includes a cylinder body 1, a front housing 2 fixed to the front end of the cylinder body 1, and a rear casing fixed to the rear end of the cylinder body 1 through a valve body 3 shell4.

[0020] The crank chamber 5 is surrounded by the cylinder block 1 and the front housing 2 . The drive shaft 6 is supported in the crank chamber 5 . In the crank chamber 5, a protruding plate 11 is fixed to the drive shaft 6 and rotates with it.

[0021] The leading end of the drive shaft 6 is connected to and drivable by an external drive source, which in this embodiment is connected to the engine E of the v...

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PUM

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Abstract

A valve body (43) adjusts opening of a supply passage (28) in response to the position in a valve chamber (46). A pressure-sensitive member (54) is moved in accordance with the pressure difference (PdH-PdL) between two pressure monitoring points (P1, P2), which are located in an external refrigerant circuit. The movement of the pressure-sensitive member (54) affects the position of the valve body (43) such that the compressor displacement is changed to reduce fluctuations in the pressure difference (PdH-PdL). A solenoid (60) changes force applied to the valve body (43) so that a set pressure difference, which is a reference value for changing the position of the valve body (43) by the pressure-sensitive member (54), is changed.

Description

technical field [0001] The invention relates to a control valve for a variable compressor in a vehicle air-conditioning and refrigeration system. The displacement of the compressor is adjustable according to the pressure of a crank chamber. Background technique [0002] Generally speaking, the vehicle air conditioning refrigeration circuit system includes a condenser, an expansion valve as a pressure reducing device, an evaporator and a compressor. The compressor sucks in the refrigerant from the evaporator and compresses it, then discharges the compressed gas to the condenser. The evaporator absorbs heat from the vehicle's air and transfers it to the refrigerant. This is because the heat of the air passing through the evaporator is transferred to the refrigerant flowing in the evaporator according to the thermal load or cooling load, so the cooling gas pressure downstream or at the outlet of the evaporator reflects the cooling load. [0003] In a typical variable variable...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B49/06F04B27/08F04B27/14F04B27/18F04B49/00
CPCF04B2027/1877F04B2027/1827F04B27/1804F04B2205/08F04B2027/1813Y10T137/86027F04B27/08
Inventor 太田雅树木村一哉川口真广水藤健松原亮安谷屋拓
Owner TOYOTA IND CORP