Radio frequency heating apparatus
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsYasuchika Aoki, Hiroshi Sumi
Life of this patent
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Abstract
A radio frequency heating apparatus includes a printed circuit board on which power-supply noise filter circuit (20) that reduces power-supply noise generated by magnetron (15) and power-supply synchronization detecting circuit (21) that is connected across both terminals of power supply for detecting information on power-supply frequency are mounted. Power-supply synchronization detecting circuit (21) is used as a discharge path for charge accumulated at both ends of capacitor (3) configuring power-supply noise filter circuit (20). This achieves the radio frequency heating apparatus that eliminates the risk of electric shock, reduces power consumption, and reduces the number of components.
Claims3
A radio frequency heating apparatus comprising:
- a heating chamber that accommodates a cooking target;
- a radio frequency generator that generates radio frequency in the heating chamber;
- a power-supply noise filter circuit connected between two power supply terminals of a power supply, the noise filter circuit configured to reduce power-supply noise generated by the radio frequency generator, the noise filter circuit including a capacitor connected across the two power supply terminals;
- a power-supply synchronization detecting circuit connected across the two power supply terminals, wherein the detecting circuit detects information on a power-supply frequency;
- and
- a printed circuit board on which the power-supply noise filter circuit and the power-supply synchronization detecting circuit are mounted;
- wherein the power-supply synchronization detecting circuit resides between the capacitor and the two power supply terminals, such that the detecting circuit provides a discharge path for charge accumulated at the power supply connection terminals of the capacitor.
Dependencies are inferred from the claim text.