Heated Wiper Spray Tubes to Prevent Washer Fluid Freezing
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Solution Overview
Problem
Existing flexible blade wiper technologies for vehicle windows face issues with washing liquid freezing in spraying tubes at negative temperatures, leading to blocked spraying functions and reduced structural flexibility.
Innovation Solution
Incorporation of heating means, such as resistive films or wires, into the wiper's structural members or accessory, specifically designed to maintain the washing liquid in a liquid state by providing heat, ensuring the wiper's flexibility and functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If washing liquid is stored in spraying tubes for vehicle window cleaning, then the spraying function is improved, but the liquid freezes at negative temperatures causing blocked spraying and reduced structural flexibility
Solution Approach 1:
The patent applies parameter changes by modifying the temperature state of the washing liquid through heating elements. The heating device changes the thermal parameter of the liquid from frozen/near-freezing state to liquid state above freezing point, ensuring the spraying function operates reliably at negative ambient temperatures without blocking
2Reliability
If heating means are added to prevent washing liquid freezing, then the spraying function reliability is improved, but the device complexity increases
Solution Approach 1:
The patent merges the heating function with existing structural members of the wiper. The heating element is integrated into the longitudinal substrate or stiffening rod, combining the thermal protection function with the structural support function, thereby preventing freezing without significantly increasing device complexity
Solution Approach 2:
The heating system is designed to automatically activate when needed (when washing liquid approaches freezing point), without requiring manual intervention. The system self-regulates to maintain the liquid in liquid state, reducing operational complexity while ensuring reliability
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 heating elements effectively restore the spraying function and maintain the wiper's flexibility by keeping the washing liquid from freezing, ensuring the wiper's operational integrity even in cold conditions.
Implementation Method 1
said heating means includes at least one heating resistive film arranged on at least one of said structural members
Data Source
AI summary
The invention relates to a wiper for vehicle windows that comprises structural members comprising at least a longitudinal substrate (10); a stiffening rod (20) arranged as an extension of said substrate (10); a wiping blade (30) attached to said substrate (10); an accessory (40) including at least one tube (42a, 42b) for spraying a washing liquid, said accessory (40) being assembled on said substrate (10). According to the invention, the wiper further includes means (60a, 60b) for heating the washing liquid, said heating means being included in the tubes (42a, 42b) of the accessory (40).