Slant plate type compressor with variable displacement mechanism
US4778348A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 1987 |
| Grant date | Oct 18, 1988 |
| Priority date | — |
| Expiry date | Jul 22, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B2027/1877
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A slant plate type compressor, such as a wobble plate type compressor, with a variable displacement mechanism for use in a refrigeration circuit is disclosed. Two passageways communicate between the crank chamber and the suction chamber in the cylinder block. A bellows is disposed in a first passageway and controls communication between the crank chamber and the suction chamber in the first passageway. The bellows operates in accordance with the crank chamber pressure. A control valve is disposed in the second passageway and controls communication between the crank chamber and the suction chamber in the second passageway in response to signal from an external sensor. This configuration enables the compressor to be operated at maximum capacity when the refrigeration circuit is turned on until the temperature in the passenger compartment of a car reaches a desired temperature without input from the pressure in the crank chamber. After the temperature in the passenger compartment of the car reaches the desired temperature, the compressor operation is controlled by the bellows based on the crank chamber pressure. Therefore, the cooling characteristics of the compressor are improved and…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.