Gas furnace with variable speed draft inducer
US6257870A · kind A · utility
33Cited by
22References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1998 |
| Grant date | Jul 10, 2001 |
| Priority date | — |
| Expiry date | Dec 21, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23N2233/04
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A method of controlling a variable speed draft inducer motor and fan in a gas furnace. The method comprises the steps of: detecting a first fault driving the motor to a maximum operating range; detecting a second fault forcing the motor to operate towards a minimum operating range; and generating a fault signal if both faults are detected substantially simultaneously.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.