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US 8,772,686 B2Granted
Shielding system for microwave ovens and microwave oven using this shielding system
AssigneeWhirlpool Corporation
InventorsWai Hang Louie, Lai Kwork Wah, Leo Liao, Daniel Wan, Nordh Erik Ulf
Life of this patent
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Abstract
A shielding system for microwave ovens includes a first layer of parallel grounded conductors and a second layer of parallel grounded conductors substantially perpendicular to the conductors of the first layer and, for high frequency, electrically insulated therefrom, each layer presenting a plurality of parallel metal wires connected at one end and grounded.
Claims14
A shielding system for microwave ovens comprising:
- a first comb-shaped layer of parallel grounded conductors, the parallel grounded conductors being connected together, by a first conductor, only at one end of the first layer;
- and
- a second comb-shaped layer of parallel grounded conductors, the parallel grounded conductors being connected together, by a second conductor, only at one end of the second layer, wherein:
- the parallel grounded conductors of the second layer are substantially perpendicular to the parallel grounded conductors of the first layer, and
- the conductors of the second layer are electrically insulated from the conductors of the first layer.
2 more elements
A shielding system for microwave ovens comprising:
- a first layer of parallel grounded conductors, the parallel grounded conductors being connected together, by a first conductor, only at one end of the first layer;
- and
- a second layer of parallel grounded conductors, the parallel grounded conductors being connected together, by a second conductor, only at one end of the second layer, wherein:
- the parallel grounded conductors of the second layer are substantially perpendicular to the parallel grounded conductors of the first layer,
- the conductors of the second layer are electrically insulated from the conductors of the first layer,
- the conductors of each layer are placed on opposite sides of an insulating plate, and
- the conductors of each layer are built as traces of a two-side printed circuit board.
4 more elements
A microwave oven comprising:
- a cooking cavity;
- a shielding system provided at one or more walls of the cooking cavity, said shielding system including:
- a first comb-shaped layer of parallel grounded conductors, the parallel grounded conductors being connected together, by a first conductor, only at one end of the first layer;
- and
- a second comb-shaped layer of parallel grounded conductors, the parallel grounded conductors being connected together, by a second conductor, only at one end of the second layer, wherein:
- the parallel grounded conductors of the second layer are substantially perpendicular to the parallel grounded conductors of the first layer, and
- the conductors of the second layer are electrically insulated from the conductors of the first layer.
4 more elements
Dependencies are inferred from the claim text.