Electrothermal heating device

Abstract

The invention relates to an electrothermal heating device used for warming beds. The invention comprises the following parts: 1. an external heating wire, 2. a central heating wire, 3. a switch of the external heating wire, 4. a switch of the central heating wire, 5. a power supply; wherein the central heating wire is at the inner side of the external heating wire. With the switching on and switching off of the external and central heating wires controlled, the purpose of controlling the heating of the central or the external part can be achieved, and unnecessary power wasting can be avoided.

Description

technical field [0001] The invention relates to an electric heating device, which can be used for heating a bed. In particular, the purpose of controlling the central or external heating can be achieved by separately controlling the on and off of the external heating wire switch and the opening and closing of the middle heating wire switch. Background technique [0002] At present, most of the electric heating devices that can be used for bed heating are controlled by a switch, and cannot control the middle and outer heating wires respectively. Contents of the invention [0003] In order to overcome the above disadvantages, the present invention provides an electric heating device. [0004] The technical solution adopted by the present invention to solve the technical problem is: an electric heating device, which can be used for heating on the bed, and is characterized in that: 1. The external heating wire is connected to 3. The external heating wire switch is connected, ...

AI Technical Summary

Problems solved by technology

[0002] At present, most electric heating devices that can be used for bed heating are controlled by one switch, and the middle and outer heating wires cannot be controlled separately.

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