Shower Insert Ventilation with Non-Return Valve
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Solution Overview
Problem
Existing shower ventilation systems face issues with dynamic pressure imbalances due to calcification or mismatched flow resistances, leading to ventilation device failure and aesthetic concerns when additional elements are attached for retrofitting.
Innovation Solution
A self-contained insert ventilation device with a non-return valve, designed in two parts, which can be easily adapted to different flow resistances and installed without altering the visual appearance, featuring a backflow preventer and optional flow limiter to manage pressure and prevent backflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a ventilation device is attached between the hose and sanitary fitting, then ventilation function is improved, but visual appearance deteriorates
Solution Approach 1:
The ventilation device is nested within the shower head structure itself, with the ventilation channel integrated into the existing sanitary fitting. The insert cartridge is placed inside the shower head's internal cavity, making the ventilation function invisible while maintaining aesthetic appearance.
Solution Approach 2:
The ventilation channel is merged with the water passage channel within the same insert cartridge structure. Both functions (water flow and air intake) are combined in a single integrated component that is installed within the existing shower head, eliminating the need for separate external ventilation attachments.
2Reliability
If flow resistance changes due to calcification or mismatched connections, then ventilation performance deteriorates, but this cannot be easily adjusted
Solution Approach 1:
The ventilation channel dimensions are designed to be dynamically adaptable to varying water flow conditions. The channel cross-section and geometry are optimized to maintain effective air suction across a range of flow rates, allowing the system to self-adjust to calcification or connection variations without requiring manual recalibration.
Solution Approach 2:
The insert cartridge provides adjustable parameters for ventilation channel size and shape that can be selected based on expected flow resistance conditions. Different insert designs with varying channel geometries can be chosen to match specific shower head flow characteristics, accommodating calcification levels and connection types.
3Reliability
If dynamic pressure becomes too high, then water escapes from ventilation opening and ventilation fails
Solution Approach 1:
A non-return valve is introduced as an intermediary element within the ventilation channel to prevent backflow of water into the air intake path. This valve allows air to be suctioned during normal operation but closes automatically when reverse pressure occurs, preventing water escape while maintaining ventilation functionality.
4Ease of operation
If insert is designed in two parts, then ease of installation and maintenance is improved, but device complexity increases
Solution Approach 1:
The insert cartridge is segmented into an upper part and lower part that can be separated for installation and maintenance purposes. The ventilation channel continues through both parts, allowing the insert to be assembled in sections and facilitating easy removal of the non-return valve for cleaning or replacement without requiring complete disassembly of the shower head.
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 solution ensures consistent water aeration without visible modifications, adapting to varying flow resistances and preventing backflow, thus maintaining effective ventilation and aesthetic integrity.
Implementation Method 1
Due to the water flow, the air is sucked in through the ventilation channel, which then causes the water to be aerated
Implementation Method 2
The ventilation device in the insert has a non-return valve. Among other things, this should also take account of the fact that in an existing installation the jet outlet openings of a shower head or the water flow within the shower head narrow due to calcification. This constriction would lead to an increase in pressure and then also to a backflow through the suction opening.
Data Source
Figure 1~4
AI summary
The invention relates to a ventilation device for ventilating shower streams that is configured as an insert, and that may be utilized in a connection of a sanitary fitting, particularly in the connection of a shower head housing. The insert contains at least one water throughput channel (15) connected to a ventilation channel (18, 19, 20, 21) such that air is suctioned in through the ventilation channel (18, 19, 20, 21) when a flow passes through the water throughput channel (15), ventilating the water stream. The insert may have a receptacle for a flow restrictor (11). A backflow preventer (13) may be provided in order to prevent water leakage from the exterior end of the ventilation channel.