Pressure-Sensitive Heating Element Using Conductive Foam
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Solution Overview
Problem
Conventional heating elements in vehicles lack pressure sensitivity, leading to inefficient heating as they uniformly increase temperature without selective heating capabilities, resulting in high energy consumption and discomfort during temperature changes.
Innovation Solution
A pressure-sensitive heating element is developed, comprising a conductive foam attached to an electrode, where the conductive material, such as carbon nanotubes, forms an electrical contact upon pressure application, allowing current flow and localized heating, reducing energy consumption by heating only the applied area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a conventional heating element uniformly heats the entire surface, then the heating function is simple and reliable, but energy consumption is high and selective heating is not possible
Solution Approach 1:
The heating element is segmented into multiple independent heating zones corresponding to different pressure-sensitive regions. Each zone can be independently controlled based on local pressure detection, allowing selective heating only where needed rather than uniform heating of the entire surface.
Solution Approach 2:
The patent merges the pressure sensing function and heating function into a single integrated element. The conductive foam serves dual purposes: detecting pressure through changes in electrical conductivity and generating heat through resistive heating when current flows, eliminating the need for separate sensing and heating components.
2Adaptability or versatility
If a separate pressure sensing unit and heating part are connected, then pressure detection and heating functions are provided, but the device complexity increases and integration is poor
Solution Approach 1:
The patent merges the pressure sensing function and heating function into a single integrated element. The conductive foam serves dual purposes: detecting pressure through changes in electrical conductivity and generating heat through resistive heating when current flows, eliminating the need for separate sensing and heating components.
Solution Approach 2:
The conductive foam material performs multiple functions simultaneously: it acts as a pressure sensor by changing conductivity under pressure, serves as a heating element through resistive heating, and provides structural support. This multi-functionality reduces system complexity while maintaining adaptability.
3Adaptability or versatility
If the heating element is made of metal wire or plate, then the heating function is reliable, but the shape and size cannot be freely controlled and partial heating is not possible
Solution Approach 1:
The patent uses a flexible foam structure instead of rigid metal wires or plates. This foam can be easily shaped and sized to match various application requirements while maintaining reliable heating performance through the conductive material embedded within it. The flexibility allows for custom geometries and partial area heating.
Solution Approach 2:
The heating element uses a composite structure combining foam material with conductive material (such as carbon nanotubes or conductive polymers). This composite provides both the shape flexibility and size adaptability of the foam while maintaining the electrical conductivity and heating reliability of the conductive material.
4Ease of operation
If the conductive material is coated on the foam, then selective heating is achieved, but the manufacturing precision must be controlled
Solution Approach 1:
The patent controls the coating process parameters (such as coating thickness, conductive material concentration, and drying conditions) to achieve consistent electrical properties across different batches. By optimizing these parameters, the manufacturing precision is improved while maintaining the ability to perform selective heating.
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 enables selective and proportional heating based on pressure, reducing overall energy consumption and providing various temperature ranges, while maintaining a high restoring force and flexibility, thus enhancing comfort and efficiency.
Implementation Method 1
when pressure is applied to the foam, an electrical contact of a certain level or higher may be formed to supply current to the front electrode
Implementation Method 2
supply current to the front electrode... heating is performed selectively only in a portion with pressure sensitivity
Data Source
AI summary
An exemplary embodiment of the present disclosure provides a pressure sensitive heating element including a front electrode and a foam including a conductive material attached to one or both surfaces of the front electrode, and a method for manufacturing the same.