Defrost control system and display panel
US4411139A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 9, 1981 |
| Grant date | Oct 25, 1983 |
| Priority date | — |
| Expiry date | Apr 9, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25D2400/36
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A defrost control system is provided for initiating one or more (defrost) timing cycles each at a preselected 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 having an electrooptical digital time display and two sets of defrost status/program indicators. The two sets of defrost indicators are separately or concurrently activated to visually present a display indicative of a plurality of program and operating status events, for example, the occurrence of an automatic or manual defrost initiation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.