Pool Cleaning Robot Post-Filtration Design to Prevent Suction Blockage
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Solution Overview
Problem
Commercially available pool electric robots suffer from poor sewage suction due to limited suction effect caused by the pre-filtration design, where debris may not be effectively sucked into the robot, leading to inefficiencies in cleaning artificial pools.
Innovation Solution
An electric robot design with an impeller positioned between the water inlet and outlet, a suction motor driving the impeller to rotate, and a filtering structure placed between the impeller and water outlet, allowing for adjustable rotational speed to enhance suction capacity, particularly effective for leaves, strip garbage, and gravel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the filtering device is disposed near the suction port (pre-filtration design), then the solid waste can be filtered out, but the suction effect is limited and debris may not be effectively sucked into the robot
Solution Approach 1:
The patent inverts the conventional pre-filtration design by placing the filtering structure after the impeller (post-filtration). This reversal allows the impeller to first generate strong suction to draw in debris, then the filtered water is discharged through the filtering structure, resolving the contradiction between suction effectiveness and cleaning efficiency
Solution Approach 2:
The patent segments the water flow path into two distinct zones: a suction zone where the impeller generates vacuum to draw in debris, and a filtration zone where the filtering structure processes the discharged water. This segmentation allows each component to optimize its function without interfering with the other, improving both suction and filtration performance
2Quantity of substance
If the filtering structure is placed before the impeller, then the solid waste is filtered out, but the suction force is blocked and suction capacity decreases
Solution Approach 1:
The patent inverts the conventional filtration placement by positioning the filtering structure in the water outlet passage after the impeller rather than before it. This ensures the suction force generated by the impeller is not blocked, while still achieving effective filtration of discharged water
Solution Approach 2:
The patent introduces a water outlet passage as an intermediary channel between the impeller and the filtering structure. This intermediary allows the suction force to act on the water and debris first, then directs the flow to the filtering structure, preventing blockage while maintaining filtration function
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 design significantly improves suction efficiency and applicability by preventing solid dirt from blocking the suction force and allowing for increased suction when needed, effectively cleaning pool water.
Implementation Method 1
the suction motor is configured to drive the impeller to rotate around an axis of the motor shaft through the motor shaft to generate suction
Implementation Method 2
the filtering structure is provided between the impeller and the water outlet
Data Source
AI summary
An electric robot includes a housing, an impeller, a suction motor, and a filtering structure. The housing is provided with a water inlet and a water outlet. The impeller is provided in the housing, and located between the water inlet and the water outlet. The suction motor is provided in the housing, and includes a motor main body and a motor shaft provided therein. The impeller is sleevedly provided on the motor shaft. The suction motor is configured to drive the impeller to rotate around an axis of the motor shaft through the motor shaft to generate suction. A rotational speed of the motor shaft is adjustable. The filtering structure is provided in the housing, and is located between the impeller and the water outlet.