| 摘要 |
FIELD: electricity. ^ SUBSTANCE: high-frequency heating device comprises inverter to rectify AC energy and to transform AC energy into high-frequency energy, step-up transformer to increase voltage of high-frequency energy extracted from inverter, high-voltage circuit for transformation of output signal of transformer into high DC voltage, magnetron for reception of high DC voltage and radiation of microwave, the first current-sensitive resistor provided in the first circuit, where anode current of specified magnetron flows, the second current-sensitive resistor separated from specified first current-sensitive resistor, controller to control oscillations of magnetron. Controller checks condition of earthing for the first wiring board and specified second wiring board. ^ EFFECT: invention achieves more reliable prevention of electric shock to user. ^ 8 cl, 9 dwg |
