Vehicle Window Heating Member with Busbars for Uniform De-icing
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Solution Overview
Problem
Conventional methods for de-icing and defogging vehicle windows, such as blowing air, unintentionally change the internal vehicle temperature and are inefficient, while heating methods using conductive wires can damage the glass and are limited to areas near the wire.
Innovation Solution
A vehicle window system with a heating member and busbars that apply heat when a voltage is applied, featuring a control device to manage de-icing and defogging modes with adjustable power levels, ensuring uniform heating and selective heating of desired regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If air is blown to the vehicle window for de-icing and defogging, then the window temperature is changed, but the internal vehicle temperature is unintentionally changed and the process takes a long time
Solution Approach 1:
The heating function is segmented from the air circulation system. Instead of using air blowing to heat the window, a dedicated heating member is applied directly to the window surface, separating the window heating function from the interior climate control system.
Solution Approach 2:
The mechanical air blowing system is replaced with an electrical heating system. The heating member converts electrical energy directly into heat at the window surface, eliminating the need for air circulation and associated energy losses.
2Temperature
If conductive wire is used to heat the window, then de-icing and defogging is achieved, but heating is concentrated only in a region adjacent to the conductive wire and the glass is damaged
Solution Approach 1:
The heating characteristics are made uniform across the entire window surface rather than being localized to wire regions. The heating member is designed to distribute heat evenly across the window, eliminating the concentrated heating zones that cause glass damage.
Solution Approach 2:
The heat distribution across the window surface is made homogeneous. The heating member provides uniform heating across the entire window area, preventing the localized overheating that occurs with conductive wires and causing glass damage.
3Productivity
If voltage is applied to busbar to heat the heating member, then de-icing and defogging is performed efficiently, but the system complexity increases
Solution Approach 1:
The busbar structure serves multiple functions: it provides electrical connection to the heating member and simultaneously acts as a structural component of the window assembly. This multi-functionality reduces overall system complexity despite the added heating capability.
Solution Approach 2:
The electrical connection structure and structural frame are merged into a single busbar component. By combining these functions into one element, the system complexity is minimized while maintaining efficient voltage delivery to the heating member.
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 system provides efficient and uniform de-icing and defogging without altering the vehicle's internal temperature, reduces thermal stress, and maintains durability by ensuring even heat distribution across the window.
Implementation Method 1
a heating member positioned adjacent to the base, an upper busbar positioned on the heating member and electrically connected to the heating member... when a voltage is applied to a busbar positioned on the vehicle window so that a heating member is heated
Data Source
AI summary
The present application relates to a heat generating side window, for a vehicle, comprising: a substrate comprising an upper edge, a lower edge, a front edge and a rear edge; a heat generating member positioned adjacently to the substrate; an upper busbar positioned on the heat generating member and electrically connected to the heat generating member; and a lower busbar positioned on the heat generating member and electrically connected to the heat generating member.