Means and techniques useful in detecting frost
US4608832A · kind A · utility
5Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 20, 1985 |
| Grant date | Sep 2, 1986 |
| Priority date | — |
| Expiry date | Mar 20, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25D21/02
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
In a heat pump system wherein an evaporator is located outdoors with a stream of air being blown through spaced fins of the evaporator and frost is formed on the fins thereby impairing the efficiency of the heat exchanger, heat flow sensing means is positioned on one or more of such fins and in heat conducting relation to such fins for the purpose of controlling defrost means such that when frost is formed the heat flow sensing means causes defrosting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.