# US 2008/0185378 A1 · Microwave Oven With a Cooking Air Duct

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- Number: US 2008/0185378 A1
- Document ID: US20080185378A1
- Status: Published application
- Kind: A1
- Application number: 11/911,730
- Filed: 2006-04-18
- Published: 2008-08-07
- Earliest claimed: 2005-04-22
- Assignees: Premark FEG L.L.C.
- Inventors: Gerard Beausse
- Web page: https://patentgrep.com/patent/US20080185378A1

## CPC

- H05B 6/6423: {wherein the microwave oven air circulation system is also used as air extracting hood}
- H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL

## Abstract

The invention relates to a microwave oven including a food-cooking enclosure, the electromagnetic energy of which is supplied by a set of two to four magnetrons (5, 6, 7) mounted on an enclosure wall, the magnetrons communicating with waveguides (55, 65, 75) which are in communication with the oven enclosure. The magnetrons are individually air-cooled and the air is then discharged to the outside via a discharge conduit. The invention is characterised in that the discharge conduits open out into a common calming chamber before discharge to the outside.

## Claims

### Claim 1

Microwave oven including:
a food-cooking enclosure, electromagnetic energy of which is supplied by a set of two to four magnetrons mounted on an enclosure wall, the magnetrons communicating with waveguides which are in communication with the oven enclosure, the magnetrons being individually air-cooled, the air being then discharged to the outside via a respective discharge conduit, wherein the air discharge conduits open out into a common calming chamber before discharge to the outside of the oven.

### Claim 2 (depends on 1)

Oven according to claim 1, the discharge conduits being arranged perpendicularly to the oven wall, of which the calming chamber is formed between a plate and an apertured hood, both being parallel to the oven wall.

### Claim 3 (depends on 2)

Oven according to claim 2 of which the hood is a metal sheet provided with downwardly oriented louvres.

### Claim 4 (depends on 3)

Oven according to claim 3 of which the hood comprises no louvre in the axis of the discharge conduits.

### Claim 5 (depends on 2)

Oven according to claim 2 of which the discharge conduits are mounted in sliding relationship relative to the plate.

### Claim at position 6

6 A microwave oven, the oven comprising:
an enclosure;
a plurality of magnetrons mounted on a wall of the enclosure, wherein the magnetrons are in communication with the enclosure using waveguides; and
a plurality of discharge conduits that open out into a common calming chamber before discharge to the outside of the oven;
wherein each magnetron is individually air-cooled, the cooling air from each magnetron being then discharged to the calming chamber via one of the discharge conduits.