EP0255764A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Slant plant type compressor with variable displacement mechanism
Assignee: Sanden Corp
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Filing: 1987-07-08
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Granted: —
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Expires: 2007-07-08
Abstract
Abstract A wobble plate type compressor with a capacity adjusting mechanism is disclosed. The compressor includes a housing (2) having a cylinder block (21) provided with a plurality of cylinders (24) and a crank chamber (23). A piston (13) is slidably fitted within each of the cylinders and is reciprocated by a swash plate mechanism (10,11) driven by a shaft (6). The swash plate has a hinge mechanism (91) for changing its slant angle. The slant angle is controlled by the pressure situation in the crank chamber which in turn is controlled by a control mechanism comprising a passageway between the crank chamber and the suction chamber (40) and including a valve mechanism (17) to control the closing and opening of the passageway. The valve mechanism includes a valve element (177) directly controlling the closing and opening of the passageway, a first valve control device (171), which controls operation of the valve element in response to pressure in the suction chamber, and a second valve control device (175) which controls the predetermined operating point of the first valve control means. The operation of the second valve control means is controlled in response to external control signals.
Inventors
- 👤 Kiyoshi Terauchi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 08:36
CPC Classifications
F; F04; F04B; F04B25/00; F04B25/04; F04B27/00; F04B27/08; F04B27/14; F04B27/16; F04B27/18; F04B27/1804; F04B2027/1809; F04B2027/1813; F04B2027/1822; F04B2027/1831; F04B2027/184; F04B2027/1854; F04B2027/1859
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
206 words
A slant type plate compressor including a compressor housing (2) having a cylinder block (21) provided with a plurality of cylinders (24) and a crank chamber (22) adjacent the cylinder block, a piston (13) slidably fitted within each of the cylinders and reciprocated by a swash plate drive (10, 11) by an drive mechanism (6), a front end plate (3) disposed on the compressor housing for rotatably supporting the drive mechanism (6), a rear end plate (4) disposed on the opposite end of the compressor housing and defining a suction chamber (40) and a discharge chamber (41), a passage (25) connecting the crank chamber (22) and the suction chamber (40), and valve mechanism (17) for controlling the closing and opening of the passage to vary the volume of the compressor, the valve mechanism including a valve element (171) directly controlling the closing and opening of the passage; characterized by: first valve control means (171) for controlling movement of the valve to open and close the passage in response to changes of pressure in the suction chamber; and second valve control means (175) coupled to the first valve control means for changing the operating point of the first valve control means in response to an external condition.
Claim 2
Dependent Claim
206 words
A slant type plate compressor including a compressor housing (2) having a cylinder block (21) provided with a plurality of cylinders (24) and a crank chamber (22) adjacent the cylinder block, a piston (13) slidably fitted within each of the cylinders and reciprocated by a swash plate drive (10, 11) by an drive mechanism (6), a front end plate (3) disposed on the compressor housing for rotatably supporting the drive mechanism (6), a rear end plate (4) disposed on the opposite end of the compressor housing and defining a suction chamber (40) and a discharge chamber (41), a passage (25) connecting the crank chamber (22) and the suction chamber (40), and valve mechanism (17) for controlling the closing and opening of the passage to vary the volume of the compressor, the valve mechanism including a valve element (171) directly controlling the closing and opening of the passage; characterized by: first valve control means (171) for controlling movement of the valve to open and close the passage in response to changes of pressure in the suction chamber; and second valve control means (175) coupled to the first valve control means for changing the operating point of the first valve control means in response to an external condition.
Claim 3
Dependent Claim
27 words
A compressor according to claim 1, wherein the first valve control means is a bellows element (191) and the second valve control means is a diaphragm (194).
Claim 4
Dependent Claim
38 words
A compressor according to claim 1, wherein the first valve control means is a bellows element (171) and the second valve control means is a solenoid (175,185) which controls the operating point of the first valve control means.
Claim 5
Dependent Claim
35 words
A compressor according to claim 1, wherein the second valve control means is a pressure sensing means (194) which controls the predetermined operating point of the first valve control means in response to negative pressure.
Claim 6
Dependent Claim
33 words
A compressor according to claim 1, wherein the first and second valve and control means comprise a single pressure sensing means, the operating point of which is controlled in response to negative pressure.
Claim 7
Dependent Claim
17 words
A compressor according to claim 5, wherein the second pressure sensing means is a bellows element (201).
Claim 8
Dependent Claim
16 words
A compressor according to claim 5, wherein the second pressure sensing means is a diaphragm (260).
Claim 9
Dependent Claim
55 words
A compressor according to claim 1, wherein the first valve control means comprises a bellows element (171) applying a biasing force in a direction toward the closed position of the valve, and the second valve control means comprises means (175) for applying an adjustable force to the bellows element to adjustably reduce the biasing force.
Claim 10
Dependent Claim
32 words
A compressor according to claim 8, wherein the means for applying an adjustable force to the bellows element includes a solenoid actuator having a solenoid (175) for generating an adjustable electromagnetic force.
Claim 11
Dependent Claim
31 words
A compressor according to claim 8, wherein the means for applying an adjustable force to the bellows element includes a conduit (199) for coupling to a source of variable negative pressure.
References Cited (Backward Citations)
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