Air flow system for common cavity microwave oven

Details Air flow system for common cavity microwave oven Air flow system for common cavity microwave oven

1976-02-26

1977-06-07

Grimley, Arthur T.

Electric heating

Metal heating

Of cylinders

219 1055F, H05B 906

Patent

active

040285200

ABSTRACT:
A combined microwave-thermal range having an oven cavity with a thermal heating element for baking and self-cleaning purposes, the bottom wall of the oven cavity having an inlet opening and the top wall having a vent opening. A microwave module mounted in space provided under the bottom wall of the cavity includes a microwave power supply housing enclosing a magnetron and blower. The module has an associated waveguide secured to the top of the housing and extending cantilever-fashion close to the bottom wall of the cavity, with the outlet of the waveguide in alinement with the central opening couples microwave energy from the waveguide to the cavity. Blower air passes from the blower inlet through the magnetron and waveguide and into the cavity for ventilating the same. The blower inlet is located at a level below the bottom wall of the cavity so that, when the blower and magnetron are turned off and the thermal element is turned on, air passing through the blower, power supply housing and waveguide flows upwardly by natural convection into the opening in the bottom wall of the cavity with final escape through the vent at the top of the cavity.

REFERENCES:
patent: 2860026 (1958-11-01), Long
patent: 2961520 (1960-11-01), Long
patent: 3172987 (1965-03-01), Fitzmayer
patent: 3367316 (1968-02-01), Eff
patent: 3470942 (1969-10-01), Fukada et al.
patent: 3626135 (1971-12-01), Fitzmayer
patent: 3962561 (1976-06-01), Maitenaz

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