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; the surface electrification partof the connecting part of electrode plate leading-out ends with different polarities and a power supply connecting wiring harness is coated with an insulation sleeve; and the surface electrificationparts of the connecting parts of the insulation sleeve, the electrode plate leading-out ends and the power supply connecting wiring harness are coated with a temperature resistant insulating sealant respectively. The sealing and insulation performances are greatly improved, the operability and process consistency of volume production are improved, and the production efficiency is greatly improved.The electrified part of the heating device can be prevented from suffering from electric leakage with the surface of the heating device in the environment that electric connection parts and power line leading-out ends are completely immerged into water. The problems of water seepage and electric leakage when the heater is used in a moisture environment are thoroughly solved, and the waterproof performance and using safety and reliability are solved fundamentally.

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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