Valve device for control of the inner volume relation in a screw type rotary compressor
US5044909A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 7, 1990 |
| Grant date | Sep 3, 1991 |
| Priority date | — |
| Expiry date | Mar 7, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C28/16
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In a rotary compressor of a cooling or heat pump system, the inner volume relation should be related in a predetermined way to the pressure relation of the compressor for an optimal efficiency to be achieved. The built-in volume relation must therefore be variable to be adapted, for example, to full load and partial load. In order to achieve the highest efficiency with respect to loading requirements, a valve device has been developed, in which the outlet port is formed in such a way as to substantially correspond to the theoretically correct radial outlet port and in which a valve body (13) adapted for the purpose has its line of action oriented towards the outlet plane. The valve body is arranged in such a way that in its fully inserted position in the outlet port (12) the mantle wall will correspond to the mantle wall of the working space of the compressor, and will be adjacent to the rotors at a minimum amount of play by means of the end face having been provided with a pointed line (14) surrounded by two concave surface (15, 15). The outlet port (12 ) in the mantle wall of the working space of the rotary compressor is delimited by an outlet plane (9) of the compressor and by t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.