Microwave oven with at least one wave choke system

Patent metadata

Field	Value
Publication number	US-9549438-B2
Application number	US-201013265152-A
Country	US
Kind code	B2
Filing date	May 10, 2010
Priority date	May 29, 2009
Publication date	Jan 17, 2017
Grant date	Jan 17, 2017

Abstract

The present invention relates to a microwave oven with at least one wave choke system. A front frame ( 12 ) encloses a front portion of a cavity wall ( 24 ) of an oven cavity ( 10 ) along a circumferential direction. An oven door ( 14 ) is provided to cover front sides of the oven cavity ( 10 ) and front sides of the cavity wall ( 24 ) completely and the front frame ( 12 ) at least partially in a closed state of said oven door ( 14 ). A first gap ( 16 ) is formed between the inner side of the oven door ( 14 ) on the one hand and front sides both of the front frame ( 12 ) and the cavity wall ( 24 ) on the other hand. A second gap ( 18 ) is formed between the front portions of the front frame ( 12 ) and the cavity wall ( 24 ). The cross-section of the second gap ( 18 ) extends perpendicularly to the cross-section of the first gap ( 16 ). A wave choke system is arranged within the second gap ( 18 ). The wave choke system comprises a plurality of choke members ( 26 ) and a counter part ( 28 ). There is no direct electric contact between the choke members ( 26 ) on the one hand and the counter part ( 28 ) on the other hand. Further, the present invention relates to a corresponding wave choke system for a microwave oven.

First claim

The invention claimed is:

1. A microwave oven with an additional conventional heating function comprising:
an oven cavity ( 10 ) formed as a casing with two side cavity walls, a top cavity wall, a bottom cavity wall, a rear cavity wall, and an open front side;
a front frame ( 12 ) attached at front portions of the two side cavity walls, the top cavity wall, and the bottom cavity wall, said front frame ( 12 ) enclosing the front portions of the two side cavity walls, the top cavity wall, and the bottom cavity wall along a circumferential direction;
an oven door ( 14 ) for covering the open front side of the oven cavity ( 10 ) completely and the front frame ( 12 ) at least partially in a closed state of said oven door ( 14 );
microwave heating components for generating electromagnetic fields;
a conventional heating function;
a first gap ( 16 ) formed between an inner side of the oven door ( 14 ), and both the front frame ( 12 ) and the front portions of the two side cavity walls, the top cavity wall, and the bottom cavity wall, wherein at least one size dimension of the first gap ( 16 ) varies when the oven door ( 14 ) is opened;
a second gap ( 18 ) for thermal insulation between the oven cavity ( 10 ) and the front frame ( 12 ), said second gap ( 18 ) being formed between the front frame ( 12 ) and the front portions of the two side cavity walls, the top cavity wall, and the bottom cavity wall, wherein:
the second gap ( 18 ) dimensions are constant when the oven door ( 14 ) is opened,
the second gap ( 18 ) encloses the front portions of the two side cavity walls, the top cavity wall, and the bottom cavity wall along a circumferential direction, and
the second gap ( 18 ) extends perpendicularly to the first gap ( 16 ).

2. The microwave oven according to claim 1 , characterized in that the microwave oven comprises at least one gasket ( 22 ) covering a front side of the second gap ( 18 ).

3. The microwave oven according to claim 1 , characterized in that the microwave oven comprises a flat oven door.

4. The microwave oven according to claim 1 , further comprising a wave choke system arranged within the second gap ( 18 ), said wave choke system comprising a plurality of choke members ( 26 ) and a counter part ( 28 ), wherein there is no direct electric contact between the choke members ( 26 ) and the counter part ( 28 ).

5. The microwave oven according to claim 4 , wherein the choke members ( 26 ) are fixed at or are a part of the front frame ( 12 ) and the counter part ( 28 ) is fixed at or is a part of the front portions of the two side cavity walls, the top cavity wall, and the bottom cavity wall.

6. The microwave oven according to claim 4 , wherein the choke members ( 26 ) are fixed at or are a part of the front portions of the two side cavity walls, the top cavity wall, and the bottom cavity wall and the counter part ( 28 ) is fixed at or is a part of the front frame ( 12 ).

7. The microwave oven according to claim 4 , wherein the choke members ( 26 ) are formed as lamellae, in particular as lamellae of an LC/RLC resonant circuit.

8. The microwave oven according to claim 4 , wherein at least one part of the choke members ( 26 ) is arranged in a row.

9. The microwave oven according to claim 4 , wherein at least a part of the choke members ( 26 ) is formed as a profile rail with a plurality of recesses forming the interspace between the choke members ( 26 ).

10. The microwave oven according to claim 9 , wherein the recesses are formed as slots with one open end and extend perpendicular to the length axis of the profile rail.

11. The microwave oven according to claim 4 , wherein a cross-section of each of the choke members ( 26 ) comprises a number of sections substantially formed as plane sheets.

12. The microwave oven according to claim 11 , wherein each of the choke members ( 26 ) comprises two to seven sections.

13. The microwave oven according to claim 11 , characterized in that adjacent sections of the choke members ( 26 ) form an angle from −90° to 180°.

14. The microwave oven according to claim 13 , characterized in that at least a number of the adjacent sections are orthogonal to each other.

15. The microwave oven according to claim 4 , further comprising a further wave choke system arranged within an outer portion of the flat oven door and enclosing the opening of the oven cavity ( 10 ).

16. The microwave oven according to claim 4 , wherein each of the choke members ( 26 ) is formed as a separate part with at least three legs.

17. The microwave oven according to claim 4 , wherein a free end of each of the choke members ( 26 ) is spaced from the first gap ( 16 ).

18. The microwave oven according to claim 4 , wherein a free end of each of the choke members ( 26 ) is spaced from the at least one gasket ( 22 ).

19. The microwave oven according to claim 6 , wherein the counter part ( 28 ) is perpendicular to the first gap ( 16 ).

20. The microwave oven according to claim 4 , wherein a distance between a plane defined by the front portion of the front frame ( 12 ) and a section of the choke members ( 26 ) furthest from the front portion of the front frame is smaller than a distance between the plane defined by the front portion of the front frame ( 12 ) and a portion of the counter part ( 28 ) furthest from the front portion of the front frame.

21. The microwave oven according to claim 4 , wherein an end of the second gap opposite to the first gap is open.

Assignees

• Hofmann Arnd
• Zbat Abdel-Ilah
• Electrolux Home Products Corp Nv

Inventors

• Hofmann Arnd
• Zbat Abdel-Ilah

Classifications

• H05B6/763 Primary

  Microwave radiation seals for doors · CPC title