Integrated, usage-dependent temperature control for gas water heaters
US4700886A · kind A · utility
8Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 29, 1986 |
| Grant date | Oct 20, 1987 |
| Priority date | — |
| Expiry date | May 29, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24H15/36
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
The control utilizes sensed gas pressure downstream of the thermostat controlled valve as an indication of heat demand. A low limit transducer is placed at 50 to 90 percent of the tank height to maintain adequate heated water for casual uses without excessive burner cycling. A flow transducer is integrated with a heat trap. The control uses output of the flow transducer (combined with the timing out of an interval timer) to enable an excursion from the low limit set point to the thermostat high limit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.