Porous Sheet Heater Joining Structure for Flexibility and Strength
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Solution Overview
Problem
Existing sheet-like heaters face challenges in maintaining tight joins between heat elements while preserving flexibility, especially under external forces like vibration or agitation.
Innovation Solution
A sheet-like heater design with alternating layers of insulating layers and porous heat elements, incorporating joining aids that fuse and solidify upon heating to form joined parts, ensuring strong connections without compromising flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the first heat element and the second heat element are tightly joined, then the connection strength is improved, but the flexibility of the heater deteriorates
Solution Approach 1:
The heater is divided into multiple independent heat elements (first heat element, second heat element) that are connected through joining aids rather than being rigidly integrated. This segmentation allows each element to maintain its flexibility while achieving strong connections at the joining points through the fusion process described in the patent.
Solution Approach 2:
The patent employs composite material structures where heat elements are joined through a multi-layer system involving joining aids that fuse under heating. This composite approach creates a connection that is stronger than individual materials alone while maintaining the overall flexibility of the assembled structure.
2Reliability
If the heat elements are firmly connected to resist external forces, then the reliability under vibration is improved, but the flexibility of the heater deteriorates
Solution Approach 1:
The joining aids are positioned and prepared in advance between the heat elements, creating a pre-configured joining system that will fuse when needed. This preliminary arrangement ensures that when external forces like vibration occur, the connections are already in place to provide reliability without requiring rigid pre-assembly.
Solution Approach 2:
The patent utilizes parameter changes in the joining process, specifically temperature changes during heating and cooling cycles. The joining aids transition from a softer state during fusion to a solidified state after cooling, creating strong connections that can resist vibration while maintaining flexibility in the overall heater structure.
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 design achieves tightly joined heat elements with enhanced flexibility, maintaining structural integrity under external forces.
Implementation Method 1
a part in which a first joining aid resides in place of the second insulating layer and the third insulating layer; and at least one joined part formed of the first porous heat element, the first joining aid, and the second porous heat element which are individually and at least partially fused under heating and then allowed to solidify
Data Source
AI summary
Aimed at achieving more reliable joining between a first and a second heat element and excellent flexibility in a sheet-like heater having two or more heat elements connected therein, provided is a sheet-like heater that includes a part in which a first insulating layer; a sheet-like first porous heat element; a second insulating layer; a third insulating layer; a sheet-like second porous heat element; and a fourth insulating layer are stacked in this order, the sheet-like heater further includes, between the first porous heat element and the second porous heat element, a part in which a first joining aid resides in place of the second insulating layer and the third insulating layer; and at least one joined part formed of the first porous heat element, the first joining aid, and the second porous heat element which are individually and at least partially fused under heating and then allowed to solidify.