PTC electric heater with waterproof structure

The utility model relates to a PTC electric heater with a waterproof structure. The PTC heater comprises a PTC heating element, an electrode plate and an aluminum tube, the electrode plate is attachedto the PTC heating element; the PTC heating element and the electrode plate are arranged in the aluminum tube; an insulating material is arranged between the aluminum tube and the electrode plate; anend waterproof plug and a tail waterproof plug which are used for sealing the PTC heating element in the aluminum tube are arranged at the two ends of the aluminum tube respectively; the end waterproof plug and the tail waterproof plug are elastic plugs in interference fit with the end of the aluminum pipe, the end waterproof plug is provided with a wire hole for a wire to penetrate out, one endof the wire is connected with an electrode slice, and the other end of the wire penetrates through the wire hole and extends out of the aluminum pipe. According to the electric heater, the PTC heatingpart is directly placed in