Flush-Mounted Cistern Variable Water Connection
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Solution Overview
Problem
Concealed cisterns for toilet bowls face difficulties in utilizing limited pre-wall installation space effectively and achieving high flushing performance, particularly in terms of water connection installation and geodetic height within these constraints.
Innovation Solution
The concealed cistern design includes an additional opening on the cistern cover with a removable closure, allowing for easier water connection installation and maximizing geodetic height by enabling the water connection to be positioned at the top, while a channel on the cistern cover accommodates the water supply line, allowing for looping without additional depth and ensuring optimal space utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the water connection is installed through the side wall opening, then the installation is straightforward, but the cistern cannot be positioned immediately below the top cover, reducing geodetic height
Solution Approach 1:
The patent introduces a vertical dimension for water connection installation by providing an opening in the cistern cover (top surface) in addition to the side wall opening. This allows the water connection to be installed from above, enabling the cistern to be positioned immediately below the top cover of the wall-mounted installation, thereby maximizing geodetic height while still maintaining installation ease through the side wall opening option.
2Length of stationary object
If the cistern is positioned immediately below the top cover to maximize geodetic height, then flushing performance is improved, but the water connection installation becomes more difficult in limited spaces
Solution Approach 1:
The patent provides two distinct openings for water connection installation: one in the side wall and another in the cistern cover. This dual-opening design allows installers to choose the side wall opening for straightforward installation or the cistern cover opening when maximizing geodetic height is the priority, thus resolving the contradiction between ease of installation and geodetic height optimization.
3Area of stationary object
If the pre-wall installation space is fully utilized, then space efficiency is improved, but the available depth for cistern positioning is limited
Solution Approach 1:
By introducing the cistern cover opening as an additional access point for water connection, the patent enables the cistern to be positioned as high as possible (immediately below the top cover) within the limited pre-wall installation space. This vertical positioning maximizes the use of available depth while maintaining full utilization of the installation footprint.
4Device complexity
If the water supply line is routed directly to the water connection, then the installation is simple, but the geodetic height available for water column is reduced
Solution Approach 1:
The patent allows the water supply line to be routed to the cistern cover opening from above, enabling a vertical routing path that preserves maximum geodetic height for the water column. This eliminates the need for horizontal routing that would reduce the available vertical space, thus resolving the contradiction between routing simplicity and height optimization.
Data Source
Figure 1~3
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AI summary
The cistern (1) has a cistern cover (2) for closing an upper side of a cistern. A draining opening is formed in an upper area of a side wall of a cistern body (1.1). The opening holds a water connection. The cistern cover has a recess at an upper side. Another opening for holding the water connection is formed in the recess. The water connection is provided with a removable closure. The former opening is closable by the closure, when the water connection is mounted in the latter opening.