Pilot burner system for water heaters
US9038575B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 9, 2012 |
| Grant date | May 26, 2015 |
| Priority date | — |
| Expiry date | Aug 2, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24H15/31
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A tube disposed in the combustion chamber of a standing pilot type fuel-fired water heater is used to increase the overall efficiency of the water heater by improving the heat transfer from the pilot flame to the tank during standby periods by funneling the standing pilot flame upwardly through the tube in a manner concentrating the pilot flame heat against an underside portion of the bottom head of the water heater tank. To further increase water heater efficiency, the pilot burner is of a dual input type. Various pilot burner operational algorithm modes are disclosed for causing the pilot burner to operate at a high firing rate during main burner operation, and at a low firing rate during standby periods.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.