Abstract: The present invention relates to a noise removing filter of a magnetron and a noise removing method. In the conventional art, the noise is removed by forming a low band pass filter formed of a choke coil and a through type capacitor. In this case, it is impossible to effectively remove the noises which are outputted at a band width below 100 MHz and at a band width of 500 MHz and 700-800 MHz. In order to overcome the above-described problem, a magnetron noise filter in accordance with the present invention which includes a shield box fixed to one side of the magnetron, a through type capacitor installed at one side of the shield box and a combined choke coil connected to a cathode terminal of the magnetron and a terminal of the capacitor, wherein the combined choke coil comprising a tightly wound portion around a bar having a certain diameter and a loosely wound portion connected with the tightly wound portion.

Abstract: A steam exhaust system of an electric pressurizing device which can control the pressure in a cooking vessel and simultaneously can prevent the pressure in the cooking vessel from excessively increasing during the cooking operation. In the steam exhaust system, a steam exhaust pipe penetrates a lid of the electric pressurizing device, and has a steam exhaust channel formed therein. A valve assembly is provided which includes a frame and a pressurizing plate. The valve assembly opens and closes the steam exhaust channel of the steam exhaust pipe by the pivoting of the pressurizing plate. A pressure control device actuates the valve assembly by way of a magnetic force to control the blocking pressure in the steam exhaust pipe.

Abstract: In a microwave oven in combination with induction heating cooker, a shielding plate is mounted on a bottom surface of a heating chamber and an induction coil is provided below the shielding plate in order to cut off microwave provided when cooking food by microwave and to transmit a high frequency magnetic field generated in an induction heating cooking, to thereby selectively performing induction heating cooking and microwave cooking. The microwave oven includes a shielding plate having a first metal line part where a plurality of metal lines are parallely arranged at regular intervals and a second metal line part where a plurality of metal lines are also parallely arranged at regular intervals being crossed to the first metal line part at a predetermined angle, and an induction coil being disposed below the shielding plate for generating an induction current when power is supplied.