PTC Rod Assembly Protrusion Integration for Heat Transfer
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Solution Overview
Problem
Conventional PTC heater assemblies for vehicles have complex structures, high fabrication costs, and reduced heat transfer efficiency due to separate insulators and air gaps, leading to noise and performance issues during initial operation.
Innovation Solution
A PTC assembly with protrusions on the electrode terminal to hold and contact PTC elements, an insulating member attached to the electrode terminal, and a rod cover housing the assembly, minimizing internal hollow space and enhancing heat transfer efficiency while reducing noise and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate insulators are used in the PTC rod assembly, then electrical insulation is ensured, but the structure becomes complex and heat transfer efficiency is reduced due to air gaps
Solution Approach 1:
The insulating member is integrated directly onto the outer surface of the electrode terminal, merging the insulator with the terminal structure. This eliminates the need for separate insulators and reduces the number of components, thereby simplifying the assembly structure while maintaining electrical insulation functionality.
Solution Approach 2:
The insulating material is extracted and applied only to the specific outer surface areas of the electrode terminal that require insulation, rather than using complete separate insulator components. This selective application reduces structural complexity while ensuring insulation where needed.
2Reliability
If separate insulators are used in the PTC rod assembly, then electrical insulation is ensured, but heat transfer efficiency is reduced due to air gaps between components
Solution Approach 1:
The insulating member is merged with the electrode terminal structure, eliminating air gaps between separate components. This direct integration creates a compact assembly where heat can transfer more efficiently from the PTC element through the electrode terminal to the rod cover, while the insulating member provides electrical insulation on the outer surfaces.
3Reliability
If conventional PTC heater assemblies are used, then heating function is provided, but fabrication costs are high due to complex assembly structure
Solution Approach 1:
The insulating member is integrated directly onto the electrode terminal, merging two components into one. This reduces the total number of parts that need to be manufactured, procured, and assembled, thereby lowering fabrication costs while maintaining the heating function through the simplified structure.
Solution Approach 2:
The electrode terminal serves multiple functions: electrical conduction, structural support, and the integrated insulating member provides electrical insulation. This multi-functionality reduces the need for separate dedicated insulator components, simplifying manufacturing and reducing costs.
4Ease of operation
If hollow spaces exist inside the rod cover, then assembly is easier, but heat transfer efficiency from PTC elements to rod cover is reduced
Solution Approach 1:
The insulating member is integrated onto the electrode terminal and positioned to fill hollow spaces within the rod cover assembly. This eliminates air gaps that would impede heat transfer, allowing heat to conduct more efficiently from the PTC elements through the electrode terminal to the rod cover, while the assembly process remains straightforward.
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
The solution simplifies the assembly, reduces fabrication costs, and improves heat transfer efficiency, resulting in a slim structure with reduced noise and enhanced performance by eliminating air gaps and using a single insulating member for electrical insulation.
Implementation Method 1
PTC element generating heat when electric power is supplied thereto
Implementation Method 2
an insulating member attached to a lower surface of the electrode terminal and outer surfaces of the protrusions
Implementation Method 3
improved heat transfer efficiency from the PTC elements to the rod cover
Data Source
AI summary
A Positive Temperature Coefficient (PTC) assembly, in which protrusions are formed on opposite longitudinal edges of an electrode terminal, PTC elements are held between the protrusions and are in contact with the electrode terminal, an insulating member is attached to an outer surface of the electrode terminal, and a rod cover houses therein the electrode terminal, the PTC elements and the insulating member. A simple structure is realized, fabrication costs are reduced, and a hollow space inside the rod cover is minimized, leading to improved heat transfer efficiency from the PTC elements to the rod cover, reduced noise and a slim structure.