Method for efficient fan control for electric or gas furnaces and heat pumps in heating mode
US9797405B1 · kind B1 · utility
0Cited by
36References
37Claims
0Family size
Inventors
Key dates
| Filing date | Mar 22, 2012 |
| Grant date | Oct 24, 2017 |
| Priority date | — |
| Expiry date | Oct 30, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B30/70
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method for controlling heater ventilation fan operation increases fan speed from low to high after a short delay after turn-on, and continues fan operation for a period of time based on duration of operation, after turn-off. The higher fan speed improves heat transfer and efficiency while the heating system is operating. Continuing fan operation after turn-off maximizes recovery of additional heat from the heat exchanger. Known methods do not provide sufficient air flow to efficiently transfer heat from the heat exchanger to the air, and leave high temperature air (i.e., 110 to 200° F.) in the heat exchanger after turn-off.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.