Controlled heating microwave ovens
US4196332A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 1978 |
| Grant date | Apr 1, 1980 |
| Priority date | — |
| Expiry date | May 1, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B40/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A frequency controlled microwave oven having an oven cavity, a frequency agile microwave source for energizing the oven cavity, a detector for detecting the power absorption in a load at various source frequencies within a bandwidth and a control circuit for setting the microwave source at frequencies as determined by the power absorption levels. The frequencies at which the oven cavity is energized are selected by the control system to obtain high efficiency, i.e. low power reflection from the cavity, and to obtain improved heating uniformity by the superimposing of various heating patterns produced by the different operating frequencies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.