Automobile Glazing Defogger With Fast-Heating Indicator Coils
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Solution Overview
Problem
Existing defogger systems in automobiles are inefficient and difficult to test for functionality, often requiring manual inspection, specialized tools, and additional workspace, which is time-consuming and costly.
Innovation Solution
An automobile glazing with integrated primary and secondary defogger coils of varying electrical resistance, where the primary coil heats faster to provide a visible indication of defogger functionality, eliminating the need for separate testing devices and manual inspection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional defogger systems are used, then fogging is removed, but harmful bacteria and fungi may grow in the defogger channels
Solution Approach 1:
The patent converts the harmful warmth trapped in defogger channels into a beneficial factor by using it to activate antimicrobial substances. The waste heat that would otherwise promote bacterial growth is instead utilized to trigger the release of antimicrobial agents from the coating material, turning a harmful condition into a protective mechanism.
Solution Approach 2:
The patent introduces an intermediary substance - the antimicrobial coating material - that mediates between the warm defogger channels and the harmful bacteria/fungi. This coating remains inactive under normal conditions but activates in response to the warmth, releasing antimicrobial agents that neutralize the harmful organisms without requiring direct contact or additional energy input.
2Reliability
If defogger channels are heated continuously, then fogging is prevented, but energy consumption increases
Solution Approach 1:
The patent implements periodic action by designing the defogger system to operate in cycles rather than continuously. The antimicrobial coating activates only when warmth from defogger operation triggers its release mechanism, allowing the system to maintain effectiveness during operation while reducing energy consumption during idle periods. The eucalyptus leaf coating naturally releases antimicrobial substances in response to temperature changes without requiring continuous power input.
Solution Approach 2:
The patent applies self-service through the temperature-responsive antimicrobial coating that automatically activates when exposed to warmth from defogger operation. The eucalyptus leaf-based coating self-regulates its antimicrobial substance release based on thermal conditions, eliminating the need for external control systems or additional energy input to maintain antimicrobial activity.
3Reliability
If antimicrobial substances are applied to defogger channels, then bacterial growth is prevented, but the substances may be harmful to the environment
Solution Approach 1:
The patent changes the parameter of antimicrobial substance selection by transitioning from conventional synthetic antimicrobials to natural eucalyptus leaf extracts. This parameter change maintains the antimicrobial effectiveness needed to prevent bacterial and fungal growth in defogger channels while significantly reducing environmental harm. The eucalyptus-based coating provides the same protective function but with biodegradable, eco-friendly properties.
Solution Approach 2:
The patent uses composite materials by combining eucalyptus leaf extracts with the defogger channel coating matrix. This composite approach integrates the antimicrobial properties of natural eucalyptus substances into the existing defogger system structure, creating a unified coating that provides both defogging functionality and environmentally friendly antimicrobial protection.
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
Enables quick and efficient detection of defogger coil functionality with minimal time and effort, providing a visual confirmation of operation without additional tools or workspace.
Implementation Method 1
substances, for example in the form of a coating material applied to the defogger channels, which, in response to warmth from operation of the defogger, release antimicrobial substances
Implementation Method 2
heating element arranged to heat the glazing
Implementation Method 3
The inner glazing 12 may have a hydrophilic coating applied to its outer surface 12a facing the passenger compartment 2
Data Source
Figure 1
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AI summary
An automobile glazing defogger 106 comprising of one or more primary defogger coil 102 in a predetermined pattern, design or other representation and a secondary defogger coil 104 covering the rest of the automobile glazing. The primary defogger coil 102 is heated faster to a specified temperature to provide faster defogging than the secondary defogger coil 104 and to indicate the working of the defogger 106 (FIG. 1).