Junction box for integrated thick-film heating element

Abstract

The invention discloses a junction box for an integrated thick-film heating element. The junction box comprises a box body, a fixed part arranged at a box side, at least two through holes formed in the box body, and terminal plates matched with the through holes; the other end of each terminal plate is welded with a heating circuit of a thick-film heating element after penetrating the through hole; a gap towards the internal of the box body is further arranged on the box body, and the box body bottom corresponding to the gap is a platform with height lower than the box body bottom; a screw hole and a bolt matched with the screw hole are arranged on the platform; the bolt penetrates a ground line plate to fix the ground line plate on the platform; the other end of the ground line plate is downward fixed on the ground line of the thick film heating element. The junction box disclosed by the invention is concise in structure, high in line integration and convenient for production, mounting and maintenance.

Description

technical field [0001] The invention relates to a thick film heating element, in particular to a junction box for an integrated thick film heating element. Background technique [0002] The stainless steel thick film heating element is mainly composed of a stainless steel substrate, an inner insulating medium layer, a conductor layer, a resistance heating layer and an outer insulating medium layer from the inside to the outside. The water flows through the inner wall of the stainless steel, and the thickness of the inner insulating medium layer is about 100 microns. Due to the short heat conduction distance from the resistance heating layer to the stainless steel substrate, the thermal resistance is small and the thermal response speed is fast. [0003] Thick film heating belongs to surface heating, and the overall heating is relatively uniform, and the heating efficiency will not be reduced due to a large number of bubbles generated on the surface of the heater. Since the ...

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Problems solved by technology

[0005] Some time after the applicant put the above product on the market, the customer reported the following problems: 1. Because this product is mostly installed on water heaters or coffee machines, it is not safe to expose the above structure; 2. It is inconvenient for subsequent production and installation; 3. Although the patent improves the terminal, the terminal of the ground wire still needs to be welded separately in the original way, so the ground wire needs to be handled separately after the device is installed, and the wiring of the above-mentioned device is messy when used, which is not conducive to later maintenance

In addition, due to the need for welding processes, the production cost of our production is also relatively high

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