Induction heating cooker
US9055615B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2009 |
| Grant date | Jun 9, 2015 |
| Priority date | — |
| Expiry date | Jan 24, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B2213/07
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The present invention provides an induction heating cooker, which is structured to cut off visible light being incident upon an infrared sensor, yet being capable of more accurately sensing any abnormality of the infrared sensor before heating is started. To this end, the induction heating cooker includes a sensor failure sensing-purpose light emitting portion that emits visible light for sensing any failure of an infrared sensor, a visible light cutting filter provided on a surface of a printed circuit board holding the infrared sensor so as to cover the field of view of the infrared sensor, and a control unit that limits the output of an inverter circuit supplying a high-frequency current to a heating coil when the output of the infrared sensor is equal to or less than a threshold value in a situation where the sensor failure sensing-purpose light emitting portion is lit up. The infrared sensor receives the visible light from the sensor failure sensing-purpose light emitting portion to irradiate inside the visible light cutting filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.