Suction Lip Pressure Control for Stable Floor-Cleaning Pickup
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Solution Overview
Problem
Existing floor cleaning machines face challenges in achieving an optimized suction result due to varying soil conditions and floor types, leading to inconsistent cleaning efficiency.
Innovation Solution
The method involves determining and adjusting the negative pressure between squeegee lips to maintain a target angle of attack, which is achieved by controlling the blower device's power, using pressure sensors for measurement, and regulating the suction flow to ensure optimal suction performance across different floor conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the suction flow is increased to improve cleaning performance, then the suction power is improved, but the angle of attack of the squeegee lips becomes too steep, reducing cleaning efficiency
Solution Approach 1:
A sensor detects the actual angle of attack of the squeegee lips and feeds this information back to the controller. The controller adjusts the suction flow dynamically to maintain the angle of attack within the optimal range, ensuring both high suction power and cleaning efficiency.
Solution Approach 2:
The system dynamically changes the suction flow parameter based on detected angle of attack conditions. When the angle deviates from the optimal range, the suction flow is adjusted to bring the angle back to the desired value, optimizing both power and efficiency.
2Use of energy by moving object
If the suction flow is decreased to reduce energy consumption, then the energy efficiency is improved, but the angle of attack becomes too flat, reducing suction performance
Solution Approach 1:
The sensor continuously monitors the angle of attack and provides feedback to the controller. The controller adjusts the suction flow to the minimum level required to maintain the optimal angle of attack, thereby reducing energy consumption while preserving suction performance.
Solution Approach 2:
The suction flow parameter is dynamically adjusted based on the detected angle of attack. The system finds the optimal balance point where energy consumption is minimized while maintaining sufficient suction performance through precise parameter control.
3Power
If the angle of attack is increased to improve suction performance, then the suction power is improved, but the wear on the squeegee lips increases
Solution Approach 1:
The sensor detects the angle of attack and provides feedback to the controller. The controller maintains the angle of attack within the optimal range, preventing excessive wear on the squeegee lips while preserving sufficient suction power for effective cleaning.
Solution Approach 2:
The suction flow parameter is adjusted to maintain the angle of attack within an optimal range that balances suction performance and component durability. This prevents the angle from becoming too steep, which would cause excessive wear.
4Adaptability or versatility
If manual adjustment of the squeegee position is used to optimize cleaning, then the adaptability to floor conditions is improved, but the operator workload increases
Solution Approach 1:
The system performs self-adjustment of the suction flow based on sensor feedback about the angle of attack. The controller automatically modifies operating parameters to adapt to varying floor conditions without requiring manual intervention from the operator.
Solution Approach 2:
The sensor-controller system continuously monitors and automatically adjusts the suction flow to maintain optimal angle of attack. This closed-loop control enables the system to adapt to different floor conditions autonomously, eliminating the need for manual adjustment.
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 approach allows for consistent and optimized suction results, maintaining an optimal angle of attack between 35° and 70°, even with changing floor conditions, enhancing cleaning efficiency and handling without operator intervention.
Implementation Method 1
a fan device generates a suction flow which causes a vacuum in a space between the first squeegee and the second squeegee
Implementation Method 2
The blower device generates a suction flow (indicated by reference number 66 in FIG. 2). This suction flow 66 causes a vacuum to be applied in the space 60
Implementation Method 3
The negative pressure is determined on the one hand by the performance of the blower device and on the other hand by the inflow of ambient air into the space between the squeegee lips
Data Source
AI summary
The invention relates to a method for adjusting a position of a suction lip (50, 52) of a floor-cleaning machine (10) relative to a floor (18) to be cleaned. According to the method, a first suction lip (50) and at least one mutually spaced second suction lip (52), which are arranged on a suction beam (48), contact the floor (18); a fan device (54) generates a suction flow which causes an application of negative pressure in an area (60) between the first suction lip (50) and the second suction lip (52); a negative pressure is ascertained; and the suction flow (66) is adjusted such that the negative pressure lies at a target value or in a target value range in such a manner that an angle of attack (86) of the first suction lip (50) and the second suction lip (52) on the floor (18) lies at a target value or in a target value range.