Thermostat with automatic heat/air conditioning changeover
US4316256A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 1979 |
| Grant date | Feb 16, 1982 |
| Priority date | — |
| Expiry date | Dec 31, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23N2223/08
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A microcomputer controlled digital thermostat has separate, independent registers for storing heating control information and cooling control information. On a periodic basis, the microcomputer determines whether the furnace should be turned on, based upon a temperature signal indicative of room temperature, a time-of-day value indicative of the present time of day, and the stored heating control information. If the furnace is already off and the microcomputer determines that it should remain off, the microcomputer then determines whether air conditioning is needed, based upon the temperature signal, the time-of-day value, and the stored cooling control information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.