Variable discharge-amount compressor for refrigerant cycle

Details Variable discharge-amount compressor for refrigerant cycle Variable discharge-amount compressor for refrigerant cycle

1998-10-21

2000-11-21

Walberg, Teresa

Pumps

With condition responsive pumped fluid control

Pressure responsive relief or bypass valve

417306, 417213, 4172222, 417440, F04B 4900

Patent

active

061494011

ABSTRACT:
A variable discharge-amount compressor includes a compression unit for compressing refrigerant, and a discharge-amount varying unit for varying a discharge amount of refrigerant discharged from the compression unit. The discharge-amount varying unit has a first control room communicating with inlet and outlet of the compression unit, a second control room communicating with the inlet, and a third control room communicating with the second control room through a orifice. The first control room communicates with the inlet through a control passage opened and closed by a control valve. Further, a bypass passage communicating with the inlet is opened when the control passage is opened. Therefore, when an engine for driving the compressor is rotated to be accelerated, a pressure difference is generated between a pressure inside the second control room and a pressure inside the third control room, thereby opening the control passage and the bypass passage. Thus, the compressor can reduce a discharge amount of refrigerant during an acceleration of the engine without any extra detector or control device, resulting in a low production cost.

REFERENCES:
patent: Re35672 (1997-11-01), Taguchi
patent: 4526516 (1985-07-01), Swain et al.
patent: 4865866 (1989-09-01), Moore
patent: 5059097 (1991-10-01), Okazaki et al.
patent: 6015269 (2000-01-01), Ota et al.
patent: 6074173 (2000-06-01), Taguchi

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