Electrically controlled programmable digital thermostat and method for regulating the operation of multistage heating and cooling systems
US4442972A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 1981 |
| Grant date | Apr 17, 1984 |
| Priority date | — |
| Expiry date | Sep 14, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23N5/203
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An electronically controlled programmable wall thermostat provides better control of comfort temperature and permits improved energy-saving temperature setback at selected intervals of the day or night in multistage heating and cooling systems and is particularly useful in achieving improved energy savings for systems having heat pump means in the main temperature conditioning stage of the system. The thermostat includes clock means, temperature sensing means, means for displaying desired parameters of time and temperature, data entry and storage means for programming the thermostat to maintain desired temperatures during selected time intervals, and a processing means with a memory incorporating a permanently stored program instruction sequence which responds to signals from the temperature sensing means for controlling the heating and cooling systems in accordance with the time-temperature sequence programmed into the thermostat by the user. A novel method of temperature control is described in which the temperature sensing and processing means cooperate in a unique way to regulate operation of the main or heat pump stages of the heating and cooling systems relative to a programm…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.