Wiper Arm Spraying Device Integrated Valve Unit
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Solution Overview
Problem
Existing wiper arm spraying devices lack a compact and aerodynamically efficient design, leading to suboptimal wiping behavior and hydraulic performance, especially at high speeds.
Innovation Solution
The integration of a valve unit within the wiper arm hose unit, with a separate housing for the valve and nozzle units, and the use of coupling elements for secure attachment to the wiper rod and adapter, allows for a compact, aerodynamic arrangement that maintains efficient fluid flow and attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the valve unit is integrated into the wiper arm hose unit, then the overall height is reduced and aerodynamics are improved, but the complexity of assembly increases
Solution Approach 1:
The valve unit is integrated into the wiper arm hose unit, combining two separate components into one unified structure. This merging reduces the overall height and improves aerodynamics by eliminating the need for separate mounting of the valve unit and hose unit, while the integrated design simplifies assembly by reducing the number of connection points and fastening operations required.
Solution Approach 2:
The integrated valve unit and hose unit serve multiple functions within a single component structure. The valve unit not only controls fluid flow but also serves as part of the hose assembly, providing both valuation and fluid conduction functions simultaneously. This multi-functionality reduces the number of separate components needed, thereby reducing overall height and simplifying assembly.
2Ease of manufacture
If separate housings are used for valve unit and nozzle unit, then assembly and manufacturing are simplified, but the aerodynamic performance deteriorates
Solution Approach 1:
The valve unit housing and nozzle unit housing are merged into a single integrated housing structure. This combination improves aerodynamic performance by creating a streamlined, continuous surface that reduces turbulence and drag. The integrated housing eliminates gaps and joints between separate components that would otherwise disrupt airflow, while still allowing for modular assembly of internal components.
Solution Approach 2:
The integrated housing features curved and streamlined surfaces designed to optimize aerodynamic flow. The housing contours are shaped to guide airflow smoothly over the component, reducing turbulence and drag. This curved design approach maintains ease of manufacture through injection molding or similar processes while significantly improving aerodynamic performance compared to boxy or angular separate housings.
3Ease of operation
If the valve unit is spaced apart from the nozzle unit, then maintenance access is improved, but the compactness and aerodynamics are reduced
Solution Approach 1:
The integrated housing contains segmented internal chambers that separate the valve unit and nozzle unit functionally while maintaining physical integration. This segmentation allows for targeted access to specific components through removable access panels or detachable sections of the housing, providing maintenance access without requiring complete disassembly. The segmented design maintains external compactness and aerodynamics while enabling internal component accessibility.
Solution Approach 2:
The valve unit and nozzle unit are nested within the integrated housing structure, with one unit positioned inside or adjacent to the other. This nesting arrangement maintains compact external dimensions and smooth aerodynamic surfaces, while the nested configuration allows for strategic placement of access points on the housing exterior that provide reach to both nested components without increasing overall volume.
Data Source
AI summary
The invention relates to a wiper arm spraying device (10a; 10b) for coupling to a wiper arm (12a; 12b), comprising at least one valve unit (14a; 14b) which is designed to supply a nozzle unit (16a; 16b) with wiper fluid. According to the invention, the valve unit (14a; 14b) is designed for integration into a wiper arm tube unit (18a; 18b).