Combination convection and microwave oven having improved microw

Details Combination convection and microwave oven having improved microw Combination convection and microwave oven having improved microw

1989-09-28

1990-07-10

Leung, Philip H.

Electric heating

Metal heating

Of cylinders

219 1055R, 219 1055E, 219400, 126 21A, F05B 672

Patent

active

049408690

ABSTRACT:
A cooking oven having both conventional heating as well as microwave heating. The oven muffle includes a metal distribution sheet along a back wall, forming a cavity with the back wall. A bladed turbine fan is included within the cavity, driven by an electric motor. Microwave energy is introduced into the cavity through a waveguide having an exit iris in the cavity. Microwave energy entering the cavity exits through openings in the metallic distribution sheet, as well as past the rotating turbine blade through additional holes in the distribution sheet. The microwave energy exiting the distribution plate provides for a better cooking energy distribution throughout the oven.

REFERENCES:
patent: 4335290 (1982-06-01), Teich
patent: 4477706 (1984-10-01), Mittelsteadt
patent: 4481396 (1984-11-01), Matsubayashi et al.
patent: 4556772 (1985-12-01), McCammon et al.
patent: 4591683 (1986-05-01), Eke
patent: 4849592 (1989-07-01), Claesson et al.

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