Vehicle Wiper Heating Indicator Using Thermochromic Materials
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Solution Overview
Problem
Low temperatures affect the functionality of motor vehicle window wiping systems, causing reduced flexibility of wiper blades and potential freezing of windshield washer fluid, which impairs operation and reduces wiping quality, without providing user warnings for heating device activation.
Innovation Solution
Integration of a heating indicator using thermochromic materials that change color in response to temperature, visibly alerting the user when the wiper system or windshield washer fluid is heated, ensuring awareness of operational conditions and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heating devices are integrated into the wiper system to prevent freezing and maintain flexibility, then the operational reliability in cold conditions is improved, but the user is not warned about the heating operation and potential safety risks
Solution Approach 1:
The patent applies thermochromic materials that change color in response to temperature changes. The indicator remains transparent at normal temperatures and turns colored (e.g., red) when the heating device is activated, providing visual feedback to the user about the heating operation and potential safety risks.
Solution Approach 2:
The patent introduces a visual indicator as an intermediary between the heating device and the user. This indicator mediates the information transfer by translating the invisible thermal state into visible color changes, allowing users to awareness of heating operation without direct contact or additional electronics.
2Device complexity
If thermochromic materials are used for the heating indicator, then the device complexity is reduced compared to electronic indicators, but the indicator only provides temperature information rather than detailed diagnostic data
Solution Approach 1:
The thermochromic indicator is self-powered and requires no external energy source, control electronics, or complex mechanisms. It automatically responds to temperature changes through the inherent properties of the thermochromic material, eliminating the need for batteries, sensors, or circuitry while providing sufficient temperature awareness.
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 indicator effectively warns the user of heating device operation and environmental conditions, enhancing safety and operational efficiency by providing visual cues for temperature-related changes, thus improving wiper system performance in winter conditions.
Implementation Method 1
heating indicator using thermochromic materials that change color in response to temperature
Implementation Method 2
heating device using heating electrical conductors embedded in the mass of the washer fluid supply tube(s)
Data Source
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Figure 3
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AI summary
The invention relates primarily to a vehicle windshield wiping system comprising at least one wiper blade driven in motion by an arm articulated to said blade by at least one connector/adapter assembly, which system is equipped with a heating device. According to the invention, the wiping system comprises at least one heating indicator (10, 10a, 10b, 10c; 12, 12a, 12b, 12c; 14, 14a; 16; 20) indicating that at least one element of said wiping system has a temperature exceeding a predefined threshold value.