Bidirectional closed electric heater

The utility model discloses a bidirectional closed electric heater, which comprises an electric heater body, an air inlet pipe and an exhaust pipe which are communicated and connected with the surface of the electric heater body, and supporting legs welded at the bottom of the electric heater body, the two ends of the electric heater body are each provided with an anti-collision assembly. The metal tension band and the supporting rod are installed outside the electric heater body, the metal tension band conducts reinforcement treatment on the exterior of the electric heater body, the structural strength is improved, in the heating process, the phenomena such as deformation are not prone to occurring, the integrity of the external structure is kept, and the supporting rod and the metal tension band conduct anti-collision protection treatment on the electric heater body. If the two ends are touched by mistake, the baffles extrude the rubber columns and the rubber bases on the surfaces of the heat insulation pla