Suction nozzle and cleaning device
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Solution Overview
Problem
Existing suction nozzles in cleaning robots face challenges in effectively removing water stains and dust due to the large space required for the roller brush, which reduces the negative pressure and results in unsatisfactory cleaning effects.
Innovation Solution
A suction nozzle design where the suction port directly fits the surface to be cleaned, with a rotatable suction nozzle body and a sealing ring that can elastically deform to maintain a sealed fitting clearance between the suction nozzle and the sewage tank, allowing the suction port to adapt to flat, convex, and concave surfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a roller brush is installed in the suction nozzle to roll foreign objects, then the cleaning coverage is improved, but the space required increases and the negative pressure generated by the suction nozzle decreases
Solution Approach 1:
The patent removes the roller brush component from the suction nozzle, extracting the element that was consuming space and reducing negative pressure. The suction nozzle is redesigned to directly contact the surface without any intermediate rolling components, thereby eliminating the space occupation and negative pressure reduction caused by the roller brush while maintaining cleaning functionality through direct suction
2Manufacturing precision
If the suction nozzle is made fixed to maintain stable structure, then the manufacturing precision is improved, but the adaptability to different surface conditions (flat, convex, concave) deteriorates
Solution Approach 1:
The patent transforms the fixed suction nozzle structure into a dynamic one by adding a rotating joint that allows the suction nozzle to rotate relative to the device body. This enables the suction nozzle to automatically adjust its angle and position to adapt to different surface conditions (flat, convex, or concave surfaces) while maintaining a simple and precise structural design through the rotating connection mechanism
3Productivity
If the suction port is positioned to directly contact the surface for maximum suction force, then the cleaning effect is improved, but the risk of air leakage and loss of negative pressure increases
Solution Approach 1:
The patent employs a flexible sealing ring made of elastic material to seal the gap between the suction nozzle and the sewage tank. This flexible sealing component can deform to accommodate the rotating movement of the suction nozzle while maintaining effective sealing, thus preventing air leakage and preserving negative pressure even when the suction port is positioned to directly contact the surface for maximum cleaning effect
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 ensures that the suction nozzle remains in the working position, maintaining direct suction force on the surface, which improves the cleaning effect by preventing air leakage and maintaining negative pressure.
Implementation Method 1
The sealing ring is provided at the drainage port, configured to seal a fitting clearance between the suction nozzle body and the sewage tank and capable of elastically deforming
Data Source
AI summary
Disclosed is a suction nozzle, which includes a suction nozzle body and a sealing ring. One end of the suction nozzle body is provided with a suction port, and the other end of the suction nozzle body is provided with a drainage port. A drainage channel communicating with the suction port and the drainage port is formed inside the suction nozzle body. The drainage port is configured to communicate with the sewage tank of a cleaning device. The suction nozzle body is configured to be rotatably installed to the device body of the cleaning device so as to have a working position that maintains the suction port fitting a surface to be cleaned. The sealing ring is provided at the drainage port, configured to seal a fitting clearance between the suction nozzle body and the sewage tank and capable of elastically deforming.