Microwave ovens with infrared rays heating units

Details Microwave ovens with infrared rays heating units Microwave ovens with infrared rays heating units

1992-12-03

1994-05-10

Leung, Philip H.

Electric heating

Microwave heating

With diverse-type heating

219759, 392429, H05B 664

Patent

active

053109791

ABSTRACT:
An infrared heating unit for a microwave oven comprises an outer envelope in which an electrical heating coil is mounted. The heating coil comprises a series of loops. A group of loops located in a central section of the coil has a pitch interval greater than that of the loops located in end sections of the coil, whereby less heat is generated by the loops located in the central station.

REFERENCES:
patent: 2303873 (1942-12-01), Anderson
patent: 3621200 (1971-11-01), Watts, Jr.
patent: 4486639 (1984-12-01), Mittelsteadt
patent: 4703154 (1987-10-01), Ikegami et al.
patent: 4728763 (1988-03-01), Bell et al.

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