Vehicle Window Cleaning Foam Generator with Speed-Adaptive Air Flow
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Solution Overview
Problem
Existing vehicle window cleaning devices face challenges in maintaining effective cleaning under variable and extreme conditions, such as high speeds, temperature fluctuations, and aerodynamic entrainment of foam, which leads to inefficiencies and reduced visibility.
Innovation Solution
A vehicle window cleaning device with a foam generator that adjusts air flow and foam composition based on vehicle speed, temperature, cleanliness detection, and wiper blade phase, using a control unit and multiple air inlets to optimize foam distribution and prevent foam entrainment, ensuring optimal cleaning with minimal liquid usage across various conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If foam is used for cleaning the windshield, then cleaning efficiency is improved with less liquid, but foam is prone to evaporation, freezing, and aerodynamic entrainment at high speeds
Solution Approach 1:
The system dynamically adjusts the air-to-liquid ratio in the foam generator based on real-time detection of vehicle speed, temperature, and cleanliness state. At low speeds, higher foam content is generated for efficient cleaning with less liquid. At high speeds, the system reduces air flow to prevent foam entrainment and freezing, maintaining reliability under varying operational conditions.
Solution Approach 2:
The invention changes the physical parameters of the cleaning medium by controlling the proportion of air mixed with cleaning liquid. The foam generator adjusts foam density and liquid content based on detected conditions, transforming the cleaning medium from fixed-composition foam to variable-composition foam that adapts to speed and temperature changes, preventing both liquid waste and foam instability.
2Productivity
If air flow is increased to enhance foam cleaning, then cleaning effectiveness is improved, but foam entrainment by aerodynamic forces increases at high speeds
Solution Approach 1:
The control unit receives feedback from the detection unit about vehicle speed and cleanliness state, then adjusts the air flow to the foam generator accordingly. When high speed is detected, the system reduces air flow to minimize foam generation and prevent aerodynamic entrainment. When low speed is detected, air flow is increased to maximize cleaning effectiveness, creating a closed-loop control system that balances productivity and harmful effects.
3Reliability
If cleaning liquid is applied in liquid form, then foam entrainment is reduced, but cleaning efficiency decreases compared to foam application
Solution Approach 1:
The system transitions from static liquid application to dynamic foam application with variable air content. At low speeds, foam is generated for enhanced cleaning efficiency. At high speeds, the system dynamically reduces air content and approaches liquid-only application to prevent entrainment, thus maintaining reliability while optimizing productivity based on operational conditions.
4Adaptability or versatility
If multiple sensors and control mechanisms are added to adapt foam generation, then cleaning performance under variable conditions is improved, but device complexity increases
Solution Approach 1:
The detection unit serves multiple functions: detecting vehicle speed, ambient temperature, and windshield cleanliness state simultaneously. The control unit integrates these multiple parameters and coordinates adjustment of the foam generator air flow and liquid flow. This multi-functional approach achieves high adaptability without proportionally increasing system complexity, as one detection system handles multiple monitoring tasks.
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 device ensures effective cleaning by adapting air flow and foam composition, reducing foam entrainment at high speeds and preventing freezing, thus maintaining visibility and efficiency across a range of conditions with potentially less liquid usage.
Implementation Method 1
a foam generator (7), configured to take air and a cleaning liquid (L) and mix the air and the cleaning liquid (L) and transform them at least partially into foam
Implementation Method 2
the means (75) for regulating the air flow comprise a controlled flow pump
Data Source
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AI summary
The invention relates to a vehicle window cleaning device, comprising: - a foam generator (7), configured to draw in air and a cleaning liquid (L) and mix the air and the cleaning liquid (L) and transform them at least partially into foam, characterized in that it further comprises: - means for regulating the air flow drawn in by the foam generator (7), - a control unit (9) configured to control the means for regulating the air flow (75) according to at least one parameter.