Multiple stage modulating gas fired heat exchanger
US10174967B2 · kind B2 · utility
5Cited by
0References
29Claims
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Assignee
Inventors
Key dates
| Filing date | Dec 21, 2015 |
| Grant date | Jan 8, 2019 |
| Priority date | — |
| Expiry date | Feb 14, 2037 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23N2237/02
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A modulating heating system includes a tube heat exchanger having a plurality of burners, a combustion air blower (CAB) having an exhaust vent connected with the plurality of burners, the CAB operable at a first speed and a second speed, a first valve connecting a fuel source to a first subset of the plurality of burners, and a second valve connecting a fuel source to a second subset of the plurality of burners, wherein the first and second valves each have a low fire rate and a high fire rate. The heat exchanger is operable through multiple heat stages at a constant fuel-air mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.