Cooling system airflow sensor for a cooking appliance
US6772752B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 10, 2003 |
| Grant date | Aug 10, 2004 |
| Priority date | — |
| Expiry date | Apr 10, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24C7/082
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A cooking appliance includes an oven cavity, one or more heat sources for generating hot oven gases within the oven cavity to perform a cooking operation, a controller and a cooling system. The cooling system includes a fan having a drive shaft upon which is mounted a multi-pole magnet. A Hall effect sensor is positioned adjacent to the magnet and provides pulses to the controller. Using the pulses, the controller calculates a speed of the cooling fan. If, during a cooking operation, the controller determines the fan is not operating, the cooking operation is halted. Likewise, if the controller determines the fan is operating at too low a speed, the cooking operation is halted. In either case, a corresponding fault code is generated and stored within the controller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.