Defrost control
US5257506A · kind A · utility
67Cited by
4References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 22, 1991 |
| Grant date | Nov 2, 1993 |
| Priority date | — |
| Expiry date | Mar 22, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25D21/006
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A defrost cycle for a heat pump system which optimizes the efficiency of the heat pump by initiating defrost depending upon the relationship of both the outdoor coil ambient temperature and the outdoor coil refrigerant temperature with a predetermined temperature reference level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.