ELECTRICAL HEATING DEVICE

PURPOSE:To ensure the satisfactory working of an electrical heating device even with the synchronous use with another one by using a control circuit which changes the heating capacity of its own heating element in accordance with the output of a deciding circuit that decides the working states of other electrical heating devices connected to a plug socket. CONSTITUTION:A plug socket 2 is used in addition to a route that is connected to a heating circuit from a commercial power supply AC via a power supply switch SW. Then a power supply plug of another electrical device can be put into the socket 2. Thus the power supply AC can supply the power to another electrical heating device connected to the socket 2. At the same time, a current transformer CT is interlinked to a connecting route between one of both receptacles of the socket 2 and the power supply AC for detection of the through current. The output of the CT is amplified by an amplifying circuit 3a. The the heating capacity of a heating element of its own electrical heating device is changed in response to the detecting result of the through current. An operating state deciding circuit 3 is formed with the CT, the circuit 3a, etc. Thus it is possible to avoid such a case where the temperature rises up extraordinarily and a pleasant heating state is lost.