Air conditioner with combustion heater for refrigerant
US6289685A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 1999 |
| Grant date | Sep 18, 2001 |
| Priority date | — |
| Expiry date | Apr 22, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2313/021
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A compressor, an outdoor heat exchanger, an indoor heat exchanger, and the like are connected to each other with refrigerant piping to form a refrigerant circuit in a closed loop configuration. The refrigerant circuit is provided with a four-way switch valve such that the direction of circulation of a refrigerant is reversible. The refrigerant circuit is provided with a refrigerant heater. During a cooling operation, an electromagnetic valve is closed so that the outdoor heat exchanger serves as a condenser to perform a refrigeration cycle operation. During a heating operation, natural gas is caused to burn in the refrigerant heater to heat and evaporate the refrigerant with high-temperature combustion gas. The evaporated refrigerant flows into the indoor heat exchanger, exchanges heat with indoor air, and is condensed, whereby the indoor air is heated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.