Setback control for HVAC system
US5363904A · kind A · utility
13Cited by
4References
12Claims
0Family size
Inventors
Key dates
| Filing date | Jul 30, 1993 |
| Grant date | Nov 15, 1994 |
| Priority date | — |
| Expiry date | Jul 30, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24F11/39
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A setback control for an HVAC system is selectable by depressing a switch on a control panel associated with a programmed microprocessor. The programmed microprocessor is operative to thereafter change the setpoint temperature by a predefined amount each hour until a predetermined number of hours have passed. The set point temperature is thereafter held for a further hourly count before being returned to the starting setpoint temperature. The directional change in setpoint temperature is a function of whether the HVAC system is in a heating or cooling mode of operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.