Controller for air conditioning or heating system
US4433809A · kind A · utility
Inventor
Key dates
| Filing date | Sep 11, 1981 |
| Grant date | Feb 28, 1984 |
| Priority date | — |
| Expiry date | Sep 11, 2001 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24F2120/00
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A control circuit is disclosed for controlling an air conditioning and/or heating system in a region comprising a first circuit for establishing electrical signals corresponding to an upper and lower temperature of a first temperature range. A second circuit is provided for establishing electrical signals corresponding to an upper and lower temperature of a second temperature range. A presence sensor is provided for detecting the presence of a person inhabitating the region. A logic circuit is connected to the aforementioned circuit for controlling the system in accordance with a first temperature range when a person is inhabiting the region and for controlling the system in accordance with the second temperature range when the region is void of inhabitation by a person.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.