A surface cleaning apparatus
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Solution Overview
Problem
Existing wet vacuum cleaners lack a simple and effective method to control the flow of fluid emitted onto surfaces, limiting user flexibility and efficiency in cleaning operations.
Innovation Solution
A surface cleaning apparatus featuring a valve with a moveable member that adjusts flow rates between two positions, allowing for high and low fluid flow modes, enabling thorough cleaning or efficient coverage of larger areas with the same fluid volume, and facilitating faster drying.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a valve with rotational movement (ball valve) is used to control fluid flow, then the valve structure is simple and easy to manufacture, but the flow control precision and reliability are insufficient
Solution Approach 1:
The patent replaces the traditional rotational ball valve mechanism with an axial movement mechanism. The member moves linearly along the valve axis between two positions, eliminating the need for rotational movement and complex sealing surfaces. This substitution improves reliability while maintaining manufacturing simplicity.
Solution Approach 2:
The patent changes the movement parameter from rotational (angular displacement) to linear (axial displacement). The member translates along the axis to control flow, changing the fundamental motion parameter from rotation to linear movement, which simplifies the sealing requirements and improves reliability.
2Reliability
If high fluid flow rate is used for thorough cleaning, then cleaning effectiveness improves, but fluid consumption increases and drying time increases
Solution Approach 1:
The patent introduces a dynamic flow control system where the member can be positioned axially to adjust the flow rate. This allows the system to adapt between high flow for thorough cleaning and low flow for water conservation, making the cleaning process dynamic rather than static.
Solution Approach 2:
The patent enables parameter change in fluid flow rate by moving the member axially between positions that correspond to different flow rates. This allows optimization of the balance between cleaning effectiveness and fluid consumption based on specific cleaning requirements.
3Measurement precision
If complex valve mechanisms are used to control fluid flow rates, then flow control precision improves, but device complexity increases
Solution Approach 1:
The patent extracts the essential flow control function from complex rotational mechanisms and implements it through simple axial movement. By removing unnecessary rotational components and sealing surfaces, the design achieves flow control precision with minimal complexity.
Solution Approach 2:
The patent substitutes complex rotational valve mechanics with simple linear axial movement. This replacement maintains flow control capability while dramatically reducing mechanical complexity, fewer moving parts, and simpler sealing requirements.
Data Source
Figure 1
Figure 2a~3b
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AI summary
A surface cleaning apparatus including, a fluid storage container; an outlet for directing fluid from the fluid storage container onto a surface to be cleaned; and a valve configured to regulate the flow of fluid from the fluid storage container to the outlet and including: a body; and a member being moveable relative to the body between a first position and a second position and defining a flow path extending through a surface thereof; wherein the flow of fluid through the valve flows at a first rate when the member is in the first position and at a second rate and along the flow path when the member is in the second position, the second rate of flow being lower than the first rate of flow.