High frequency heating apparatus with displacement identifiable remaining heating duration and phase control based thereon
US6998591B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 2003 |
| Grant date | Feb 14, 2006 |
| Priority date | — |
| Expiry date | Mar 3, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B6/666
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a high frequency heating apparatus, a microcomputer inputs the phase signal of a commercial AC power supply and determines whether a timer switch in a mechanical timer apparatus is in ON-state to determine whether the high frequency heating apparatus is in a heating-time set state. If so, the microcomputer turns on a switch that controls the conduction between the commercial AC power supply and a high voltage transformer at such a timing that minimizes the rush current in accordance with the phase of the commercial AC power supply, thereby suppressing the rush current, allowing the user to visually confirm the remaining heating time, and realizing a cost reduction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.