Method for manufacturing an electrical heating device and heating device
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Solution Overview
Problem
Electrical heating devices with extruded profiles face a trade-off between protecting heating resistors and achieving low flow resistance for heat dissipation, as increased openings for heat transfer diminish the protective barrier and vice versa.
Innovation Solution
The method involves using heat sinks fastened to tubes via plastically deformed sections of the extruded profile, allowing for large heat dissipation surfaces with minimal flow resistance by eliminating the need for the plate in heat dissipation and maximizing the surface area of openings between tubes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If openings are increased in the plate to reduce flow resistance, then heat dissipation improves, but the protective barrier for heating resistors diminishes
Solution Approach 1:
The plate is segmented into multiple separate plates arranged in series between the tubes. Each plate has openings that collectively provide sufficient flow area while the multiple plates together maintain structural integrity and protective function. This segmentation allows the flow resistance to be reduced without compromising the protection of heating resistors.
2Area of stationary object
If heat sinks are added for heat dissipation, then heat transfer surface area increases, but device complexity increases
Solution Approach 1:
The heat sinks are merged with the tube structure through direct attachment, and the plate structure is designed to simultaneously provide mechanical support and positioning for the heat sinks. This integration reduces the number of separate components and simplifies the overall device structure while maintaining effective heat dissipation surface area.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively protects heating resistors while maintaining low flow resistance and enhancing thermal coupling, resulting in a cost-effective heating device with improved heat dissipation.
Implementation Method 1
Heat sinks are connected to the tubes for the purpose of heat dissipation
Implementation Method 2
Fluid to be heated can flow through the openings and thereby absorb heat generated by heating resistors
Implementation Method 3
heat generated by heating resistors disposed in the tubes
Implementation Method 4
the flange is plastically deformed. In the plastic deformation of the flange, a section of the underlying heat sink can also be deformed
Data Source
AI summary
What is described is a method for manufacturing an electrical heating device, wherein electrical heating resistors are disposed in tubes of an extruded profile, and openings are cut into a plate of the extruded profile connecting the tubes. According to this disclosure, fastening sections of the extruded profile are plastically deformed and, by means thereof, heat sinks are fastened on the extruded profile. A corresponding electrical heating device is also described.