Patent ID: 8818214
Filing Date: 2014-08-26
Classification: G03G,H05B

Abstract:
1. A heating apparatus for supplying power to first and second heat generation members, wherein the heating apparatus is switchable between a first state in which the first and second heat generation members are connected in series and a second state in which the first and second heat generation members are connected in parallel, wherein the combined resistance of the first and second heat generation members in the second state is less than the combined resistance of the first and second heat generation members in the first state, the heating apparatus comprising: a first detection part which detects a positive phase of a half wave in an alternating voltage of a commercial power supply applied to the second heat generation member in the second state; a second detection part which detects a negative phase of a half wave in an alternating voltage of the commercial power supply applied to the second heat generation member in the second state, wherein the first detection part or the second detection part has a current transformer; and a control part which stops supplying power from the commercial power supply to the first and second heat generation members in a case where an overpower state is detected according to a detection result by the first detection part or a detection result by the second detection part, wherein the control part determines an overpower state in a case where a deviation between a first detection result in which power is detected by the current transformer of the first detection part and a second detection result in which power is detected by the current transformer of the second detection part is greater than a predetermined value.