Defrost control system
US4395887A · kind A · utility
63Cited by
4References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 14, 1981 |
| Grant date | Aug 2, 1983 |
| Priority date | — |
| Expiry date | Dec 14, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25D21/002
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A defrost control system is provided for initiating one or more (defrost) timing cycles each at a different time and for terminating the cycles at the end of their respective predetermined (defrost) periods. The unit generally includes a solid-state, microprocessor based, programmable twenty-four hour timer, and a display panel. The system also includes a proportional defrost module which measures the absolute humidity of the atmosphere and adjusts the defrost initiate time(s) in accordance therewith.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.