Infrared thermostat control
US4793553A · kind A · utility
Inventor
Key dates
| Filing date | Nov 9, 1981 |
| Grant date | Dec 27, 1988 |
| Priority date | — |
| Expiry date | Nov 9, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D23/1902
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A system for automatically controlling heating and air conditioning equipment that make up the environmental control system in a building. The system measures heat flow into and out of the building by means of an infrared sensor mounted on an inner wall and directed toward an outer wall or window. In the winter the system logic monitors the ambient temperature and if sufficient heat flow is present to allow the incoming thermo energy to heat the internal environment to the desired set point, the system directs the shut off of the furnace. In summer the system logic decides when the heat flow has decreased to a point that the air conditioning equipment can be shut down. An adjustable time delay is response to heat flow is used to compensate for rapid changes in heat flow experienced during partially cloudy days.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.