Microwave oven equipped with a structurally simple apparatus for

Details Microwave oven equipped with a structurally simple apparatus for Microwave oven equipped with a structurally simple apparatus for

1997-12-04

1999-03-16

Leung, Philip H.

Electric heating

Microwave heating

With specific generator

315 511, 315 537, 315 3963, 313299, 331184, H05B 664, H01J 2502

Patent

active

058833676

ABSTRACT:
A microwave oven includes a cooking chamber, a waveguide, and an apparatus for generating a microwave frequency energy. The apparatus includes a cathode for emitting electrons, a first grid for controlling and focusing the flow of electrons from the cathode, a choke structure for serving as a capacitor, wherein the cathode, the first grid and the choke structure define an input cavity functioning as a resonant circuit, a trimming resistor for inducing a bias voltage on the first grid, a second grid provided above the first grid and having a plurality of holes through which the electron beams passing through the holes of the first grid pass, an anode for receiving the electrons passing through the holes of the second grid, cooling fins for cooling heat generated by the anode, a driving voltage source for providing a driving voltage to the cathode and the anode, an antenna for extracting the microwave from an output cavity into the cooking chamber via the waveguide, the output cavity being defined by the second grid and the anode, and a feedback structure for feeding a portion of the microwave frequency energy back to the input cavity.

REFERENCES:
patent: 2529668 (1950-11-01), Wang
patent: 3805111 (1974-04-01), Ryabinin et al.
patent: 5233269 (1993-08-01), Lien
patent: 5541391 (1996-07-01), Seong

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