Patent ID: 6998591

Claim:
A high-frequency heating apparatus comprising: a high-frequency oscillator; a high-voltage transformer that supplies electric power appearing at a secondary side thereof to the high-frequency oscillator; switching means that switches whether to supply or not to supply electric power to a primary side of the high-voltage transformer; a time-limiting device including heating duration setting means that permits a heating duration to be set according to an amount of displacement by which the heating duration setting means is displaced forward and that is displaced backward as the heating duration passes by, and a time-limiting switch that turns from off to on when the heating duration is set and that turns from on to off when the amount of displacement returns to an initial value; phase monitoring means that monitors a phase of the supply voltage; and controlling means that is fed with electric power when the time-limiting switch is on and that controls the switching means according to the phase of the supply voltage as monitored by the phase monitoring means.