Microwave oven
AssigneeSamsung Electronics Co., Ltd.
InventorsSeong-Deog Jang, Dae-Sung Han, Yong-Woon Han, Han-Seong Kang, Kwang-Seok Kang
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Abstract
A microwave oven includes a filter unit having choke coils disposed on ground lines, to which low and high voltage units are grounded, and on a power line connected to a controller so as to block high frequency noise. Impedances of the ground and power lines are greatly increased by the choke coils. Accordingly, noise is prevented from being radiated to the outside through the ground lines, and from flowing to the controller through the power line, thus allowing the controller to perform a stable operation.
Claims24
A microwave oven comprising:
- a magnetron;
- a low voltage unit which converts direct current (DC) power into alternating current (AC) power and supplies operating power;
- a controller which receives the operating power;
- a high voltage transformer having primary and secondary coils, wherein the high voltage transformer induces the AC power as a high AC voltage according to a turn ratio of the primary coil to the secondary coil;
- a high voltage unit which generates a high DC voltage from the high AC voltage induced by the high voltage transformer and supplies the high DC voltage to the magnetron;
- and
- a filter unit which blocks high frequency noise while passing a signal of a DC voltage through ground lines to which the low and high voltage units are grounded and a power line connected between the low voltage unit and the controller.
A microwave oven comprising:
- a low voltage unit which converts direct current (DC) power into alternating current (AC) power and supplies operating power;
- a controller which receives the operating power;
- a high voltage transformer which induces the AC power as a high AC voltage;
- a high voltage unit which generates a high DC voltage from the high AC voltage;
- and
- a filter unit which blocks high frequency noise while passing a signal of a DC voltage through ground lines to which the low and high voltage units are grounded and a power line connected between the low voltage unit and the controller.
A microwave oven comprising:
- a low voltage unit which converts a first DC voltage into an AC voltage;
- a high voltage unit which converts the AC voltage from the low voltage unit into a second DC voltage of a level higher than the first DC voltage;
- a controller;
- and
- a filter unit which blocks high frequency noise generated between the low and high voltage units while passing a signal of a direct current (DC) voltage through lines to one or more potentials, to which the low and high voltage units are connected, and/or through a power line connected between the low voltage unit and the controller,
- the filter unit disposed on ground lines and disposed on a power line connected between the low voltage unit and the controller, which blocks high frequency noise while passing a signal of a DC voltage through the ground lines to which the low and high voltage units are grounded and the power line connected between the low voltage unit and the controller.
Dependencies are inferred from the claim text.