Control valve for variable displacement compressor
a variable-discharge compressor and control valve technology, which is applied in the direction of pump control, positive-discharge liquid engine, machines/engines, etc., can solve the problems of inability to achieve sufficient improvement of compression efficiency, the flow rate of refrigerant circulating in the compressor cannot be reduced to a limited degree, and the compression efficiency is reduced. , to achieve the effect of improving compression efficiency and stable controllability
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[0030] The present invention will now be described in detail with reference to the accompanying drawings showing preferred embodiments thereof.
[0031]FIG. 1 is a conceptual view showing the arrangement of a control valve for a variable displacement compressor, according to the present invention.
[0032] The control valve for a variable displacement compressor, according to the present invention has a ball valve 11 forming a first valve, a spool valve 12 forming a second valve, a diaphragm 13 forming a pressure-sensing section, and a solenoid 14 forming a pressure-setting section, which are arranged in the mentioned order.
[0033] The ball valve 11 introduces refrigerant discharged at discharge pressure Pd from a discharge chamber of the variable displacement compressor, and controls the flow rate of the introduced refrigerant to supply the refrigerant at pressure Pc1 to a crankcase. The spool valve 12 introduces refrigerant delivered at pressure Pc2 from the crankcase, and controls th...
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