Assembling unit with PTC heating device

Abstract

The invention discloses an assembling unit with a PTC heating device. The assembling unit comprises the PTC heating device, a first installing support, a second installing support and a power supply leading-in wiring harness for connecting a temperature controller and a temperature fuse, wherein the first installing support is provided with a base and a seal cover; an approximately semicircular first through hole is formed in the tail end face of the base; the part of the first through hole, corresponding to the tail end face of the base, of the seal cover is provided with an extending part vertical to the seal cover; and a second through hole corresponding to the first through hole in the tail end face of the base is formed in the extending part. The wiring harness is used for tight compaction and sealing through a seal ring, added with a sealant at the joint, the hidden danger that moisture air and water drops permeate into the cavity of the base is thoroughly completely eradicated,even if the first support is immersed in water, complete sealing of electrified connecting points inside the first installing support still can be guaranteed. The hidden dangers of electric leakage and short circuits when the assembling unit is used in moisture environment and submerged environment are thoroughly solved structurally, so that the safety and reliability are greatly improved.

Description

technical field [0001] The invention relates to a thermosensitive ceramic heater, in particular to an assembly of PTC heating elements. Background technique [0002] A bracket for a PTC heat-sensitive ceramic electric heater and a PTC electric heater (publication number CN201174784), including a mounting surface and a supporting surface, a concave cavity for installing and fixing a heating element is arranged on the supporting surface, and the bottom of the concave cavity is also There is an inwardly extending cavity for placing the wires connected to the lead-out terminals of the heating element, and a lead-out hole is provided on the supporting surface at the bottom of the cavity. A through hole for placing the fuse is provided on one side wall of the supporting surface. [0003] Through this technical solution, the fuse can be combined with the bracket to prevent it from being connected to the periphery of the bracket and affecting safety. However, since it is still inst...

AI Technical Summary

Problems solved by technology

[0021] Purpose of the invention: The purpose of the present invention is to solve the problem of loosening of the heat-conducting aluminum tube caused by the thermal stress release caused by the instantaneous cold and heat shock during the frequent work of the heating element in the tube of the existing PTC heating device - heating - shutdown cooling The gap between the heating element in the tube and the conductive electrode and the insulating layer, and the contact gap caused by the flashover between the heating element and the electrode sheet, carbonization, and even the local high temperature caused by the long-term flashover, resulting in the melting of the insulating layer A series of major and vicious safety accidents such as surface electrification and leakage, short circuit and breakdown, explosion and burning of flammable plastic indoor units

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