Heated Wiper Blade With Self-Regulating PTC Heating Element
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Solution Overview
Problem
Existing heated windshield wiper blades are either costly to manufacture or complex to install, and they often fail to integrate effectively with the windshield defrosting system, leading to hazardous conditions due to ice and snow accumulation.
Innovation Solution
A heated wiper blade design featuring a unique heat distribution pattern with a heating element embedded in the blade, using conductive materials like graphite and PTC materials for efficient heat regulation, and a self-regulating temperature control system to prevent overheating, which is economical to produce and easy to install, ensuring integration with the windshield defrosting system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a heating element is embedded in the wiper blade to prevent ice and snow accumulation, then the wiper blade can effectively clear the windshield in cold conditions, but the manufacturing cost increases significantly
Solution Approach 1:
The patent combines the heating function with the wiper blade structure by embedding heating elements directly into the blade assembly. This integration merges two separate functions (wiping and heating) into a single unified component, eliminating the need for separate heating assemblies and reducing overall manufacturing complexity and cost while maintaining effectiveness in cold conditions.
Solution Approach 2:
The wiper blade is designed to perform multiple functions: mechanical wiping of the windshield and thermal heating to prevent ice and snow accumulation. By making the blade multi-functional, the patent eliminates the need for separate dedicated heating devices, thereby reducing manufacturing costs while ensuring reliable operation in cold weather conditions.
2Reliability
If a complex heating system is installed in the wiper blade to ensure effective heating, then the heating performance is improved, but the installation complexity increases
Solution Approach 1:
The heating system is divided into discrete heating elements that are independently embedded into specific zones of the wiper blade. This segmentation allows for modular installation and replacement, simplifying the installation process while maintaining effective heating coverage across the blade surface through distributed heating zones.
Solution Approach 2:
The heating elements are designed to be self-regulating or easily controllable through simple integration with the vehicle's existing electrical system. The system automatically activates when needed without requiring complex control mechanisms, and the modular design allows for easy installation by the end user or technician without extensive wiring or configuration work.
3Adaptability or versatility
If the wiper blade operates independently without integration with the windshield defrosting system, then the wiper blade can function on its own, but the windshield may still freeze up creating hazardous conditions
Solution Approach 1:
The patent integrates the wiper blade heating system with the vehicle's windshield defrosting system by connecting the heating elements to the same electrical circuitry and control mechanisms. This merging ensures that when the defrosting system is activated, the wiper blade simultaneously receives heat, preventing ice and snow accumulation on both the windshield and the blade itself, thereby eliminating the hazardous condition of blade freezing while maintaining operational independence.
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 provides effective and efficient heating for the windshield wiper blades, preventing ice and snow accumulation while being cost-effective and user-friendly, ensuring safe operation in cold conditions.
Implementation Method 1
heating element embedded in the blade
Implementation Method 2
using conductive materials like graphite and PTC materials for efficient heat regulation
Implementation Method 3
using conductive materials like graphite and PTC materials for efficient heat regulation, and a self-regulating temperature control system to prevent overheating
Data Source
AI summary
A heated wiper blade for motor vehicles includes an elongated flexible beam and a heating element extending along the beam. The heating element may be configured to provide increased heat at the central portion of the blade and at the opposite ends of the blade. The heating element is comprised of an electrical conductor material that varies the amperage drawn between hot and cold ambient temperature operation. The flexible beam may include curved end portions and a flat or reduced curvature central portion. The heating element is preferably covered and sealed off to prevent loss of heat energy.