Window Cleaning Robot With Segmented Pad Layout for Extended Coverage
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Solution Overview
Problem
Current robotic window cleaners are not fully perfected, lacking efficiency in debris removal and window surface coverage, with existing models requiring frequent pad replacement and manual wetting, and lacking effective polishing capabilities.
Innovation Solution
A robotic window cleaner with a movement system, agitator, cleaning pad, and polishing pad arrangement that addresses the window surface in a predefined direction, using a suction-based attachment system with active and paused modes to optimize cleaning efficiency and battery life, and featuring proximity, orientation, and pressure sensors to vary attachment force for intuitive operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the robot uses a single cleaning pad width, then the device complexity is reduced, but the window surface coverage is insufficient requiring frequent pad replacement
Solution Approach 1:
The cleaning system is divided into multiple cleaning pads arranged in series along the direction of motion, each pad addressing a specific width of the window surface. This segmentation allows the robot to cover a larger total area without requiring a single oversized pad, thereby reducing the need for frequent replacements while maintaining manageable device complexity.
Solution Approach 2:
The cleaning pads are arranged not only in the direction of motion but also in the width direction, creating a two-dimensional coverage pattern. This dimensional arrangement maximizes the window surface area covered during each pass, improving overall cleaning efficiency without proportionally increasing device complexity.
2Duration of action of stationary object
If the robot maintains constant attachment force, then the attachment system is simpler, but battery life is reduced due to continuous high-power operation
Solution Approach 1:
The attachment force is made dynamic rather than constant, allowing the robot to adjust suction power based on operational needs. The system transitions between active mode (higher power for cleaning) and paused mode (lower power for positioning or idle periods), significantly extending battery life while the control system manages the complexity of force variation.
Solution Approach 2:
The attachment system operates in periodic cycles, alternating between high-power attachment phases during cleaning operations and low-power phases during transitions or paused periods. This periodic operation reduces average power consumption and extends battery life, with the control system managing the timing and duration of each phase.
3Manufacturing precision
If the robot lacks polishing capabilities, then the device complexity is reduced, but the cleaning quality is insufficient
Solution Approach 1:
The polishing function is merged with the cleaning pad system, where the same cleaning pads that remove debris also provide polishing action through their material properties and motion characteristics. This integration achieves high cleaning quality without adding separate polishing mechanisms, thereby limiting the increase in device complexity.
Solution Approach 2:
The cleaning pads are designed to perform multiple functions: debris removal through mechanical action and surface polishing through their material characteristics. This multi-functionality allows a single component to address both cleaning quality requirements and device complexity constraints, eliminating the need for separate dedicated polishing systems.
4Ease of operation
If the robot requires manual pad wetting, then the device complexity is reduced, but the ease of operation deteriorates
Solution Approach 1:
The cleaning pads are designed to be self-wetting, where the pads automatically absorb and retain cleaning fluid from the window surface or environment during operation. This self-service mechanism eliminates the need for manual wetting by the user, significantly improving ease of operation while avoiding the complexity of integrated fluid supply systems.
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 robotic window cleaner effectively removes debris and polishes windows with reduced pad replacement needs, improved battery life, and enhanced user experience through adaptive attachment force management, ensuring thorough and efficient cleaning.
Implementation Method 1
a suction system that creates negative pressure to attach the robot to the window surface
Implementation Method 2
at least one agitator configured for removing debris from a window surface
Implementation Method 3
at least one cleaning pad for removing debris from the window surface
Implementation Method 4
each polishing pad polishes the window surface such that any layer of cleaning fluid present on the window surface is left as a thinner layer and/or is dispersed over a greater area
Data Source
AI summary
A window-cleaning robot that includes: a powered agitator that, when active, mechanically removes debris from a window surface; a cleaning pad, which is wetted with a cleaning fluid and contacts the window surface so as to remove debris therefrom with the aid of the cleaning fluid; and a movement system, for example including a number of wheels, which moves the robot over the window surface and has a defined forwards direction; the agitator is located forwards of the cleaning pad and the agitator and the cleaning pad are arranged such that, as the robot moves over the window surface in the forwards direction, the agitator addresses a width in a width direction, which is perpendicular to the forwards direction and parallel to the window surface, that is greater than the width addressed by the cleaning pad.