Lg Electronics Inc.

Eung Su Kim

Young Min Lee

Yang Kyeong Kim

Jin Yul Hu

Sung Hun Sim

Won Hui Lee

Kwong Yong Kim

Kwang Yong Kim

Yuri Brodsky

Kovalev Nikolai

Kyu Wan Cho

A heating apparatus using an electromagnetic wave is disclosed, by which cut-of performance of an electromagnetic wave is enhanced by increasing an electromagnetic wave absorption bandwidth having cut-off performance below &#x2212;70 dB. The present invention includes a door provided to an open front side of a body to be opened/closed and a choke filter having a panel type choke part arranged by at least one row each along an edge of the door and a filter part arranged by at least one row each along an edge of the choke part and having a plurality of slots, wherein a prescribed choke part is provided to a most inner side among rows of the choke and filter part.

Heating apparatus using electromagnetic wave

A microwave oven includes a cooking chamber; a magnetron for generating a microwave; a waveguide for guiding the microwave from the magnetron toward the cooking chamber; an antenna between the cooking chamber and the waveguide for propagating the microwave guided by the waveguide into the cooking chamber; and a driving unit for moving the antenna along a first direction and rotating the antenna.

Microwave oven having a driving unit for moving and rotating an antenna

A heating apparatus using an electromagnetic wave is disclosed, by which cut-of performance of an electromagnetic wave is enhanced by increasing an electromagnetic wave absorption bandwidth having cut-off performance below &#x2212;70 dB. The present invention includes a door provided to an open front side of a body to be opened/closed, a choke filter having a panel type choke part arranged by at least one or more rows along an edge of the door and a filter part arranged by at least one or more rows along the choke and having a plurality of slots wherein a prescribed choke part is provided to a most inner side, a glass panel attached to an inner lateral side of the door and the choke filter, and a flange part provided to an external end portion of the door along the edge of the door to lie in a same level with an inner lateral side of the glass panel.

A heating apparatus using an electromagnetic wave is disclosed, by which a capacity of a cavity is increased and by which cut-off performance of the electromagnetic wave and facilitation of door cleaning can be enhanced. The present invention includes a door provided to an open front side of a body to be opened/closed, a choke filter having a panel type choke part arranged by at least one or more rows along an edge of the door and a filter part having a plurality of slots wherein a prescribed choke part is provided to a most outer side, and a glass panel attached to an inner lateral side of the door and the choke filter.

A microwave oven door, and more particularly, an apparatus for shielding electromagnetic wave that compensates for the length of slots formed in an end of an oven door in order to improve the shielding ability capable of preventing the leakage of electromagnetic wave from the cavity. In the apparatus, a choke structure includes a choke base connected with an inner portion of the oven door, a choke inner side portion bent perpendicularly from the choke base and a choke top bent from the choke inner side portion to contact a front circumferential portion of an oven cavity. Slots are formed in the choke top and the choke inner side portion at a predetermined interval. Each slot is extended from a distal end of the choke top to a predetermined point of the choke inner side portion. The predetermined point is distanced the same as or smaller than the half of the width of the choke inner side portion from a joint between the choke top and the choke inner side portion.

Apparatus for shielding electromagnetic wave of microwave oven door

A microwave oven, which has a circular polarized wave stirrer for uniformly heating food, is disclosed. The microwave oven includes a magnetron generating electromagnetic waves, a waveguide guiding the electromagnetic waves generated from the magnetron to a cavity, and a stirrer formed to an outlet of the waveguide, receiving electromagnetic waves from the magnetron, and generating two polarized waves having different electric field directions and phases.

Microwave oven with mode stirrer

Microwave oven including a cavity for placing food therein, a magnetron for generating a microwave, a waveguide having at least two slots for guiding the microwave from the magnetron to an inside of the cavity, and a stirrer fan rotatably mounted on an inside of the cavity for varying an interfered state of the microwaves periodically, thereby heating the food more uniformly.

Microwave oven

A multimode electromagnetic wave energy rejection filter arrangement for a slot waveguide includes at least one system of series coupled LC-circuits located, at least partly, within a cavity of the slot waveguide and arranged along a predetermined line intersecting the wave vectors of electromagnetic waves to be rejected, the LC-circuits including lumped elements and the coupling between the LC-circuits being substantially weak. The LC-circuits may be located, at least partly, within grooves formed in a wall of the slot waveguide. As applied to a heating apparatus employing high frequency electromagnetic wave energy or microwave energy for heating dielectric materials, the series coupled LC-circuits are arranged along a closed line which envelopes the access opening in a body of a multimode resonator heating chamber, in which the high frequency electromagnetic wave energy is employed for heating. By optimizing the parameters of the system of series coupled LC-circuits it is possible to provide rather low transmittance for a wide range of angles of incidence of waves, as well as to minimize the transmittance dependence on the angles of incidence of these waves. The later enables to achieve high protection against leaks of electromagnetic energy from the resonator heating chamber of a heating apparatus, for example, of a domestic microwave oven.

Growing community of inventors

Seoul, South Korea

Eung Su Kim