PTC Heating Element Casing Attachment Using Force-Fit Holding Element
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Solution Overview
Problem
Existing electric heating devices with PTC heating elements face challenges in securely attaching the heating element casing to the partition wall, particularly when the elements are manufactured separately and need to be sealed and connected efficiently.
Innovation Solution
A holding element is used to establish a mechanical connection between the heating element casing and the partition wall, providing a force-fit or frictionally engaged attachment, which also serves as a shield for electromagnetic interference protection and allows for easy electrical connection to a ground terminal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the PTC heating element is manufactured as a separate component and inserted into a heating element receptacle, then the assembly process becomes more complex and time-consuming, but the heating element can be securely attached to the partition wall
Solution Approach 1:
The holding element is integrated with the partition wall structure, combining the mounting function with the existing housing component. This reduces the number of separate parts and simplifies the assembly process while maintaining secure attachment of the heating element casing
Solution Approach 2:
The holding element serves multiple functions: it provides mechanical support for the heating element casing, creates a force-fit connection, and establishes electrical connection to a ground terminal. This multi-functionality reduces assembly complexity and improves efficiency
2Reliability
If the PTC heating element is clamped between the base and the heating element receptacle, then the attachment security is improved, but the assembly process requires additional steps and time
Solution Approach 1:
The holding element is extracted as a separate functional component that can be pre-formed and then integrated into the partition wall. This allows the complex clamping function to be achieved through a single integrated piece rather than multiple separate fastening operations
Solution Approach 2:
The holding element is designed to be pre-formed with the necessary structural features for secure attachment before being installed into the partition wall. This preliminary preparation simplifies the final assembly process and reduces on-site complexity
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 solution ensures a reliable and secure attachment of the heating element casing to the housing, simplifies the assembly process, and provides effective electromagnetic shielding, enhancing the overall performance and reliability of the electric heating device.
Implementation Method 1
The holding element is connected to the partition wall on a side facing the heating chamber, and is connected to the heating element casing... a force-fit or frictionally engaged connection
Implementation Method 2
provides effective electromagnetic shielding
Data Source
AI summary
An electric heating device a housing with a partition wall which separates a connection chamber from a heating chamber for dissipating heat and from which at least one PTC heating element with a heating element casing protrudes in the direction toward the heating chamber. At least one PTC element and conductor tracks, electrically connected in the connection chamber for energizing the PTC element with different polarities and connected to the PTC element in an electrically conductive manner, are supported in the heating element casing an insulated manner. For improved support of the PTC heating element, a holding element, engaging around the heating element casing, is connected to the partition wall on its side facing the heating chamber and is connected to the heating element casing. Also disclosed is a method for the manufacture of such an electric heating device.