Induction heating device
US6812440B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 2004 |
| Grant date | Nov 2, 2004 |
| Priority date | — |
| Expiry date | May 17, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B6/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An induction heating device prevents an object to be heated from being displaced and buoyed from a mounting surface due to an mutual action of repulsive forces between the object to be heated and an induction heating coil. The induction heating device includes a source-current detector for detecting a source current input to a high-frequency inverter including the induction heating coil and an inverter circuit, a source-current change detector for measuring a change against time of a magnitude of the source current to detect a displacement and buoying of the object to be heated, such as a cooking pot, and a change examining unit. The controller controls an output of the high-frequency inverter in response to a detection result of the change examining unit. The induction heating device prevents the cooking pot from being displaced and buoyed even if the pot is not touched by a user at startup of heating or during the heating operation, and is inexpensive and safe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.