Pushbutton Mixing Cartridge With Independent Piston Flow Control
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Solution Overview
Problem
Existing pushbutton-controlled cartridges for water flow management in sanitary applications lack reliable and efficient operation, particularly in terms of flow rate adjustment and directional control, with insufficient control over flow transients and mechanical complexity.
Innovation Solution
A valve-controlled cartridge design featuring a flow-controlled piston valve with a cylindrical upper portion and shunt flow paths, where the control valve and valve piston operate independently, allowing for adjustable speed and delay in water flow opening and closing, and enabling multiple functions through ceramic disc replacement and association of inlets and outlets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a pushbutton control mechanism is used to open and close water flow, then the operation is simplified and requires small handling force, but the control over flow transients and speed profile becomes insufficient
Solution Approach 1:
A magnetic field is introduced as an intermediary between the pushbutton and the valve mechanism. The pushbutton actuates a magnetic element that remotely controls the valve opening without direct mechanical connection, enabling smooth flow transients while maintaining easy operation.
Solution Approach 2:
The direct mechanical connection between pushbutton and valve is replaced with a magnetic actuation system. This substitution eliminates mechanical friction and wear, providing more reliable and controllable flow transitions while maintaining operational simplicity.
2Reliability
If a complex valve mechanism is used to achieve precise flow control and directional selection, then the flow control reliability improves, but the device complexity increases
Solution Approach 1:
A single valve mechanism is designed to perform multiple functions: flow control, directional selection, and temperature mixing. This multi-functional design reduces the number of separate components needed while maintaining reliable flow management across different operations.
Solution Approach 2:
The control valve and directional selection mechanism are merged into a single integrated unit. This combination reduces mechanical complexity by eliminating the need for separate control systems while maintaining precise flow control and directional selection capabilities.
3Device complexity
If the control valve and valve piston are mechanically connected, then the structural simplicity is maintained, but the ability to independently adjust opening and closing speed is lost
Solution Approach 1:
A magnetic field serves as an intermediary between the control valve and valve piston, allowing independent control of their movement. The magnetic coupling enables the control valve to be actuated by the pushbutton while the valve piston responds independently based on flow conditions, enabling adjustable opening and closing speeds without complex mechanical linkages.
Data Source
AI summary
Valve controlled cartridge operated by a pushbutton for the mixing of water and/or for directing water coming from an inlet to one or more outlets. The valve is a flow controlled piston valve (10) with a valve piston (17) guided in the interior of the housing (13) for axial displacement, and where no mechanical connection exists between the control valve (30) and the valve piston.