Adjustable Deflector Element for Flush Tank Drain Fitting Flow Control
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Solution Overview
Problem
Conventional drain fittings for cisterns require complex adjustments to control the flow speed of flushing water, making it difficult to easily adjust the amount of flushing water, and often require internal modifications.
Innovation Solution
A drain fitting with an adjustable deflection element that can be manually adjusted linearly to alter the flow path of the rinsing water, allowing for easier control of flow velocity without modifying the internal structure, using a stroke adjustment unit and a deflection wall that creates an annular gap to increase the flow path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the cross-sectional area of the flow window is varied by rotary adjustment of the annular wall, then the flow velocity of flush water can be adjusted, but the adjustment mechanism becomes complex and requires extensive modification of the float chamber
Solution Approach 1:
The invention extracts the flow path adjustment function from the complex internal float chamber mechanism and relocates it to a separate, easily adjustable deflector element positioned in the water flow path above the flow window. This allows flow velocity control without modifying the internal drain assembly structure.
Solution Approach 2:
Instead of adjusting flow by changing the cross-sectional area of the flow window in the horizontal plane (rotary adjustment), the invention adjusts flow by changing the vertical position of the deflector element, thereby altering the length of the water flow path in the vertical dimension. This simpler linear adjustment achieves the same flow control effect.
2Quantity of substance
If the annular wall is rotated to adjust flow windows, then rinse water flow can be controlled, but the float chamber requires extensive modification
Solution Approach 1:
The invention extracts the flow control function from the float chamber and implements it externally using a deflector element that can be adjusted independently. This avoids the need to modify the float chamber structure during manufacturing or installation.
Solution Approach 2:
The deflector element is designed to be dynamically adjustable during operation through simple linear movement, allowing users to control rinse water flow quantity without any modifications to the float chamber. This provides flexibility while maintaining manufacturing simplicity.
3Speed
If a complex rotary adjustment mechanism is used to control flow, then flow velocity can be adjusted, but manual adjustment becomes difficult and requires disassembly
Solution Approach 1:
The invention extracts the adjustment mechanism from the enclosed float chamber and positions it externally where it is easily accessible. The deflector element can be adjusted manually from above without disassembling any components, making operation simple and maintenance-free.
Solution Approach 2:
Instead of making adjustments from within the enclosed float chamber (as in conventional designs), the invention inverts the approach by providing adjustment access from above the cistern. This allows users to easily adjust flow velocity by simply moving the deflector element without any disassembly operations.
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
Enables easy manual adjustment of the flushing water flow without dismantling the drain fitting, providing precise control over flow paths and reducing water splashing, while maintaining a simple and retrofittable design.
Implementation Method 1
By adjusting the deflector element, the flow path of the flush water flowing out through the flow window on the housing side can be adjusted, i.e., shortened or lengthened, in order to increase or decrease the flow velocity
Implementation Method 2
A turbulent flow pattern can also be generated in the annular gap, further increasing the flow path of the outgoing rinse water
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention relates to a drain fitting for a flush tank (11), comprising a housing (1) in which a movable valve plate (19) of a drain valve (23) is arranged such that a valve gap of the drain valve (23) is opened by lifting the valve plate (19) and flush water located in the flush tank (11) flows out of the flush tank (11) via a flow path (I, II, III) through at least one flow window (13) formed in the housing (1) and through the open valve gap. According to the invention, the drain fitting has an adjustable deflecting element (33) in order to adjust the flush water flowing out of the flush tank (11) per unit of time, said deflecting element being arranged at a radial distance from the flow window (13), thereby forming an annular gap (47). By adjusting the deflecting element (33), the flow path (I, III) to the housing-side flow window (13) can be lengthened or shortened.