Air-conditioning apparatus
US5878810A · kind A · utility
19Cited by
6References
46Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 28, 1994 |
| Grant date | Mar 9, 1999 |
| Priority date | — |
| Expiry date | Nov 28, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2700/21151
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
An air-conditioning apparatus forms a refrigerating cycle with a refrigerant heater and a compressor having two cylinders. The apparatus simultaneously carries out a refrigerant heating operation and a heat pump operation when a required heating capacity is high, and when the required heating capacity is low, only the heat pump operation. This operation technique helps reduce the size of the apparatus and expand a variable width of heating capacity. The apparatus also has a defrosting unit for defrosting an outdoor heat exchanger during the heat pump operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.