Sliding-vane rotary compressor for automotive air conditioner
First Claim
1. A sliding-vane rotary compressor, comprising:
- (a) a cylinder head defining a portion of a low pressure chamber, and having a portion defining an intake passage for a fluid to be compressed; and
(b) an intake pressure control valve disposed between said intake passage and said low pressure chamber for controlling the flow of the fluid into said low pressure chamber through said intake passage and including(1) a pressure responsive element actuatable in response to one of the pressure in said intake passage and the pressure in said low pressure chamber,(2) a pilot valve connected to said pressure responsive element for movement in unison with said pressure responsive element,(3) first means, defining a pilot passage adapted to be opened and closed by said pilot valve, for developing a difference in pressure, and at least one orifice through which said intake passage communicates with said low pressure chamber,(4) a main piston movable in response to said pressure difference, and(5) second means, responsive to the movement of said main piston, for varying the area of said orifice.
2 Assignments
0 Petitions
Accused Products
Abstract
A sliding-vane rotary compressor includes an intake pressure control valve disposed within a cylinder head of the compressor and located between an intake passage for a fluid to be compressed and a low pressure chamber. The control valve comprises a pressure responsive element such as a vacuum bellows or diaphragm actuatable in response to either the pressure in the intake passage or the pressure in the low pressure chamber, a pilot valve connected to the pressure responsive element, a pilot passage adapted to be opened and closed by the pilot valve for developing a difference in pressure, a main or differential piston movable in response to the pressure difference developed, and a throttle mechanism responsive to the movement of the piston for varying the area of an orifice through which the intake passage communicates with the low pressure chamber. The control valve thus constructed is actuatable in immediate response to a change in pressure of a fluid to be compressed and creates a valve-activating force strong enough to reduce the flow of the fluid when the engine r.p.m. is high.
65 Citations
7 Claims
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1. A sliding-vane rotary compressor, comprising:
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(a) a cylinder head defining a portion of a low pressure chamber, and having a portion defining an intake passage for a fluid to be compressed; and (b) an intake pressure control valve disposed between said intake passage and said low pressure chamber for controlling the flow of the fluid into said low pressure chamber through said intake passage and including (1) a pressure responsive element actuatable in response to one of the pressure in said intake passage and the pressure in said low pressure chamber, (2) a pilot valve connected to said pressure responsive element for movement in unison with said pressure responsive element, (3) first means, defining a pilot passage adapted to be opened and closed by said pilot valve, for developing a difference in pressure, and at least one orifice through which said intake passage communicates with said low pressure chamber, (4) a main piston movable in response to said pressure difference, and (5) second means, responsive to the movement of said main piston, for varying the area of said orifice. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification