Defrosting methodology for heat pump water heating system
US7028494B2 · kind B2 · utility
4Cited by
8References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 22, 2003 |
| Grant date | Apr 18, 2006 |
| Priority date | — |
| Expiry date | Aug 22, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B2700/11
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
Refrigerant is circulated through a vapor compression system including a compressor, a gas cooler, an expansion device, and an evaporator. When a sensor detects that frozen water droplets form on the evaporator, a valve positioned between the discharge of the compression and inlet of expansion device is opened. Refrigerant from the discharge of the compressor bypasses the gas cooler and enters the inlet of the expansion device. The high temperature refrigerant melts the frost on the evaporator. As the frost melts, the passage of the evaporator is opened to allow air to flow through the evaporator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.