Extended range heat pump system and centrifugal compressor for use therewith
US4739628A · kind A · utility
Inventor
Key dates
| Filing date | Nov 28, 1986 |
| Grant date | Apr 26, 1988 |
| Priority date | — |
| Expiry date | Nov 28, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B1/10
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
Improvements in heat pump systems having indoor and outdoor heat exchangers, at least two compressors, and conduit connections including associated compressor selector and change over valves operable to control the direction of flow of fluid medium through the heat exchangers from the compressors, and to control whether one or more of the compressors will be operating the system and in all cases to connect the operating compressor or compressors in series with the heat exchangers. The present invention also resides in a novel construction of a centrifical compressor for use in the heat pump system including a compressor having a housing with rotatable structure mounted therein, the rotatable structure having a pump portion for sucking fluid medium into the compressor and least three space wall members with convoluted fins positioned therebetween the direct the incoming fluid medium radially outwardly while accelerating the velocity of the medium and thereafter radially inwardly while retarding the velocity of the medium and if necessary repeating this process several times or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.