Small-diameter tubular heating film

By using a small-diameter tubular heating film structure, the heating film body and the support cylinder are tightly fitted together by the curved U-shaped part, which solves the problem of uneven temperature caused by the thermal expansion of the spiral heating alloy wire and improves temperature uniformity and dimensional stability.

CN224111334UActive Publication Date: 2026-04-10ANHUI MENGHUO ELECTRIC HEATING TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
ANHUI MENGHUO ELECTRIC HEATING TECHNOLOGY CO LTD
Filing Date
2025-04-27
Publication Date
2026-04-10

AI Technical Summary

Technical Problem

The existing spiral heating alloy wire suffers from axial displacement due to thermal expansion at high temperatures, resulting in uneven heating temperature distribution.

Method used

It adopts a small-diameter tubular heating film structure, including a heating film body composed of an upper U-shaped part and a lower U-shaped part, which are bent and closely attached to the inner wall of the heating shell. It is supported by a support cylinder to reduce current dead angles and ensure temperature uniformity and uniform thermal expansion deformation.

Benefits of technology

It achieves uniform temperature distribution, reduces radial displacement caused by thermal expansion, meets the requirements of dimensional stability and heating performance, and improves heating efficiency and temperature uniformity.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a small-diameter tubular heating film which comprises a heating film structure, the heating film structure comprises a heating film body, and electrodes are arranged at the two ends of the heating film body. The heating film body comprises upper U-shaped parts and lower U-shaped parts which are arranged at equal intervals in the axial direction, the upper U-shaped parts and the lower U-shaped parts are arranged at intervals, and the adjacent upper U-shaped parts and lower U-shaped parts are connected end to end; according to the utility model, the heating film body is formed by cutting the circular tube, the heating film body is composed of a plurality of groups of upper U-shaped parts and lower U-shaped parts which are adjacent end to end, the bent upper U-shaped parts and lower U-shaped parts can be combined to form the heating film body with an opening on one side, and the heating film body can be wrapped on a cylindrical support cylinder, so that the current dead angle can be effectively reduced, the heating temperature is promoted to be uniformly distributed, and the heating efficiency is improved. The uniformity of thermal expansion deformation is ensured; on the other hand, radial displacement caused by thermal expansion can be obviously reduced.
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