System and method for improving the thermal efficiency of a heating system
US7744366B2 · kind B2 · utility
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20References
6Claims
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Key dates
| Filing date | Oct 17, 2005 |
| Grant date | Jun 29, 2010 |
| Priority date | — |
| Expiry date | Apr 27, 2029 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23N3/082
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A system and method for providing a heating system with good thermal efficiency by adjusting combustion air flow in response to fuel-input rate changes over a wide range. An AC motor operates in a slip mode whereby as the fuel-input rate changes, the combustion air density is affected. In response, changes in the load and thus the speed of the motor occur. Consequently, the quantity of combustion air flow increases in response to a fuel-input rate increase. The motor switches to a synchronous speed in response to the fuel-input rate reaching a set value, e.g., 70 percent of maximum rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.