Electric heating – Microwave heating – With control system
Reexamination Certificate
2006-02-14
2006-02-14
Leung, Philip H. (Department: 3742)
Electric heating
Microwave heating
With control system
C219S716000, C219S719000
Reexamination Certificate
active
06998591
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.
REFERENCES:
patent: 3780252 (1973-12-01), Crapuchettes
patent: 4300032 (1981-11-01), Niu et al.
patent: 4524258 (1985-06-01), Aoki
patent: 4539453 (1985-09-01), Miyazaki et al.
patent: 53-29001 (1978-03-01), None
patent: 59-219891 (1984-12-01), None
patent: 59-228393 (1984-12-01), None
patent: 61-7589 (1986-01-01), None
patent: 63-284791 (1988-11-01), None
patent: 11-83023 (1999-03-01), None
International Search Report for corresponding PCT/JP03/02446, mailed Jun. 24, 2003.
Ito Kohei
Ueda Koji
Leung Philip H.
Sharp Kabushiki Kaisha
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