Thermostat for a gas engine heat pump and method for providing for engine idle prior to full speed or shutdown
US5309730A · kind A · utility
15Cited by
10References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 28, 1993 |
| Grant date | May 10, 1994 |
| Priority date | — |
| Expiry date | May 28, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D29/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A thermostat which provides a pulse width modulated signal to a gas engine heat pump controller. The thermostat varies the width of the pulse width modulated signal to indicate the load required to heat or cool the room. The thermostat provides an initial idle time for the gas engine heat pump. The thermostat further steps the gas engine heat pump down from high speed operation and idles the engine prior to shutting the engine off.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.