Anti-explosion single-end lead-out wire electric heater

The utility model relates to an electric heating device, in particular to an anti-explosion single-end lead-out wire electric heater, which comprises a metal pipe body, wherein one end of the metal pipe body is encapsulated, a pair of metal electricity conduction and heat conduction bodies in a semi-cylindrical shape are inserted into the metal pipe body, a plurality of positive temperature coefficient (PTC) heating sheets which are arranged at intervals are clamped between opposite planes of the two semi-cylindrical metal electricity conduction and heat conduction bodies, an insulation film is covered on the outer cylinder surfaces of one pair of metal electricity conduction and heat conduction bodies, heat conduction insulation media are filled between the insulation film and the inner wall of the metal pipe body, the two metal electricity conduction bodies are respectively connected with one lead-out electrode rod, a grounding rod is connected onto the metal pipe body, and the two lead-out electrode rods and one grounding rod are respectively connected with a power supply core wire at the opening end of the metal pipe body. The electric heater has the advantages of compact structure, good heat radiation effect and strong anti-explosion capability, and the automatic temperature control can be realized.