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US 7,402,784 B2Granted
Microwave oven with multi-stage choke seal
AssigneeLG Electronics Inc.
InventorsSung-Hun Sim, Eung-Su Kim, Jin-Yul Hu
Life of this patent
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Abstract
A microwave cooker comprises a body having a cooking chamber therein, the cooking chamber having one opened side, a microwave source disposed at the body for supplying microwave to the cooking chamber, a door coupled to the body for opening and closing the cooking chamber, and a multi-stage choke seal formed at the door, having different resonant frequencies at a frequency region higher than a central frequency of microwave, and having different LC resonant circuits for preventing the microwave from being leaked between the body and the door.
Claims17
A microwave oven, comprising:
- a body having a cooking chamber therein, the cooking chamber having one opened side;
- a microwave source disposed at the body for supplying a microwave to the cooking chamber;
- a door coupled to the body for opening and closing the cooking chamber;
- and
- a multi-stage choke seal formed at the door, having different resonant frequencies at a frequency region higher than a central frequency of the microwave, and having different LC resonant circuits for preventing the microwave from being leaked between the body and the door,
- wherein the multi-stage choke seal comprises a first choke seal and a second choke seal spaced from each other with a certain gap and cascaded to be in parallel with each other, and
- wherein the gap between the choke seals is 1/15 to ⅛ of a wavelength of the microwave.
4 more elements
A microwave oven, comprising:
- a body having a cooking chamber therein, the cooking chamber having one opened side;
- a microwave source disposed at the body for supplying a microwave to the cooking chamber;
- a door coupled to the body for opening and closing the cooking chamber;
- and
- a multi-stage choke seal formed at the door for preventing the microwave from being leaked between the body and the door, the multi-stage choke seal including:
- a groove formed at a circumferential portion of the door and having a first cavity and a second cavity spaced from each other with a certain gap by a partition wall each having an opening towards a front surface of the body;
- a control plate extending from one of the partition wall and a side wall of the groove for partially covering one of the two openings;
- and
- slots formed at the control plate with a certain period in a circumferential direction of the door,
- wherein the gap between the first cavity and the second cavity is 1/15 to ⅛ of a wavelength of the microwave.
7 more elements
Dependencies are inferred from the claim text.