Vehicle Windscreen Washer Non-Return Valve Integration
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Solution Overview
Problem
Existing windscreen washer fluid dispensing devices for motor vehicle wiper blades are bulky due to the use of non-return valves in branch connections, which complicates the hydraulic system and increases size.
Innovation Solution
The integration of non-return valves into cannulas or male connectors within the hydraulic coupling system, allowing for a more compact and simplified hydraulic connection, with heating conductors to maintain valve functionality without additional heating devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a non-return valve is used in a branch connection to prevent liquid descent, then backflow prevention is achieved, but the device becomes bulky and complex
Solution Approach 1:
The non-return valve is integrated directly into the hydraulic coupling mechanism itself, merging the backflow prevention function with the connection interface. This eliminates the need for separate valve components in the branch connection, reducing overall device complexity while maintaining reliable backflow prevention through the coupling's internal valve structure
Solution Approach 2:
The hydraulic coupling is designed to perform multiple functions simultaneously: it provides the connection interface for hydraulic lines, enables quick detachment for blade replacement, and incorporates the non-return valve for backflow prevention. This multi-functional design reduces the number of separate components needed in the system
2Reliability
If a non-return valve is used in a branch connection, then backflow prevention is achieved, but the overall device size increases
Solution Approach 1:
The non-return valve is merged into the hydraulic coupling structure, eliminating the need for separate valve housings and mounting components. This integration significantly reduces the volume occupied by backflow prevention mechanisms while maintaining the same functional performance
Solution Approach 2:
The non-return valve is nested within the hydraulic coupling structure, with the valve components housed inside the coupling body. This nested arrangement allows the valve to occupy the same spatial envelope as the coupling itself, rather than adding external volume, thereby reducing the overall dispensing device size
3Reliability
If heating conductors are integrated into the hydraulic pipe, then valve functionality is maintained, but the pipe structure becomes more complex
Solution Approach 1:
The heating conductors are integrated directly into the wall structure of the hydraulic pipe, merging the thermal management function with the fluid transport structure. This eliminates the need for separate heating elements and insulation layers, maintaining valve functionality in cold conditions while keeping the pipe structure relatively simple
Solution Approach 2:
The heating conductors are positioned specifically at critical locations within the hydraulic pipe, such as near the non-return valve and hydraulic coupling, rather than throughout the entire pipe length. This localized heating approach maintains valve functionality where needed while minimizing the overall complexity and energy consumption of the heating system
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
This configuration ensures efficient fluid circulation, prevents backflow, and reduces the overall size and complexity of the dispensing device, allowing for quicker and effective windshield washing without intervals that obstruct the driver's vision.
Implementation Method 1
the at least one non-return valve is: inserted into a cannula of an adapter, said cannula being inserted into a circulation channel of the secondary hydraulic pipe
Implementation Method 2
heating conductors to maintain valve functionality
Data Source
Figure 1~2
Figure 3~4
Figure 5~7
AI summary
The present invention relates to a device for dispensing a windshield-cleaning liquid for windshield wiper blades of a motor vehicle, comprising: a hydraulic pipe (7, 8) having at least one liquid flow channel (7a, 7b, 8a, 8b); at least one hydraulic coupling (9, 10, 11, 15) for transporting of liquid to said pipe or discharging the liquid from said pipe, characterized in that the dispensing device also comprises at least one non-return valve (20) received in the flow channel (7a, 7b, 8a, 8b) or in a hydraulic coupling (9, 10, 11, 15).