Variable displacement vane compressor

Details Variable displacement vane compressor Variable displacement vane compressor

1988-04-04

1989-06-27

Freeh, William L.

Pumps

With condition responsive pumped fluid control

Inlet throttle or stop valve

417310, F04B 4902, F04C 2908

Patent

active

048424900

ABSTRACT:
A variable displacement vane compressor for an air conditioning system used in an automobile has a cylinder assembly having a bore in which a rotor (7) is received to form at least one crescent chamber (R1, R2) between the rotor (7) and the bore. The cooling capacity is adjusted in accordance with a cooling load of the air conditioning system by displacement of an annular plate member (21) for controlling the amount of refrigerant introduced into a crescent chamber (R1, R2). The annular plate member (7) is driven by a driving units (25, 25a, 26, 27, 28, S1, S2) in which a dynamic pressure balance between a first compartment (S1) to which a refrigerant gas under a discharging pressure is introduced, and of a second compartment (S2) to which an oil under a discharging pressure is introduced. A sealing means (35a, 36) for preventing the leakage of the refrigerant gas from the high pressure region including the first compartment (S1) to the low pressure region is provided between the annular plate member (21) and a front end wall member (4) and an pressurized oil is supplied to the sealing means (35a, 36) to enhance the sealing effect of the sealing means (35a, 36).

REFERENCES:
patent: 4653991 (1987-03-01), Takeo et al.
patent: 4726740 (1988-02-01), Suzuki et al.

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