Multi-Valve Chemical Dosing Assembly With Diaphragm Isolation
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Solution Overview
Problem
Existing pool water treatment systems face challenges in precise delivery and safe handling of chemicals, which can react and damage equipment or pool structures, and require individual dosing systems for each chemical, complicating maintenance.
Innovation Solution
A multi-valve water treatment system with a cam shaft and motor-operated valve assembly, utilizing a diaphragm to isolate fluid paths and a controller for precise chemical delivery, ensuring chemicals do not contact non-sealed parts, and allowing automated operation based on water quality or time intervals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple individual dosing systems are used for each chemical, then each chemical can be dosed accurately, but the device complexity increases and maintenance becomes more difficult
Solution Approach 1:
The patent combines multiple individual dosing systems into a single integrated valve assembly where multiple valves share common components including a single motor, cam shaft, and housing. This merging approach maintains the ability to dose multiple chemicals accurately while reducing overall system complexity and easing maintenance requirements.
Solution Approach 2:
The valve assembly is designed as a universal multi-functional unit that can handle multiple different chemicals through a single integrated structure. The cam shaft with multiple cams and the shared motor drive system provide multi-functionality, allowing one device to perform the dosing of several chemicals that would traditionally require separate dedicated systems.
2Ease of operation
If chemicals are allowed to flow freely through the valve assembly, then dosing is simplified, but chemicals may contact non-sealed parts causing equipment damage
Solution Approach 1:
The patent employs diaphragms as flexible sealing membranes within the valve assembly. These diaphragms create chemical-resistant barriers that prevent chemicals from contacting non-sealed metallic or plastic parts of the valve body while still allowing controlled chemical flow through the dosing system. The diaphragms are positioned to seal against the cam shaft and valve components, ensuring chemicals remain contained within approved pathways.
Solution Approach 2:
The diaphragm acts as an intermediary barrier between the chemicals and the valve mechanism. It mediates the interaction by allowing the valve to control chemical flow while preventing direct contact between chemicals and potentially damaged components, thus protecting the equipment from chemical harm.
3Adaptability or versatility
If manual monitoring and adjustment of chemicals is performed, then flexibility in chemical application is maintained, but time consumption and labor intensity increase
Solution Approach 1:
The valve assembly is designed to operate automatically through the cam shaft mechanism that sequentially opens and closes multiple valves in a predetermined sequence. The system serves itself by mechanically coordinating the dosing of multiple chemicals without requiring manual intervention for valve operation, thereby reducing maintenance time while maintaining the flexibility to adjust dosing parameters through the controller.
Solution Approach 2:
The cam shaft provides periodic action by rotating to sequentially actuate different valves at predetermined intervals. This periodic mechanism automates the chemical dosing process, allowing the system to cycle through multiple chemicals in a timed sequence without continuous manual monitoring, thus reducing labor time while preserving adaptability through programmable control.
4Device complexity
If a single motor drives the cam shaft to operate multiple valves, then the device complexity is reduced, but the precision of individual valve actuation may be compromised
Solution Approach 1:
The cam shaft is segmented with multiple distinct cams, each cam designed with specific profiles to actuate a corresponding valve. This segmentation allows a single motor to precisely control multiple valves independently, as each cam segment translates the rotational motion into the specific actuation pattern needed for its associated valve, maintaining precision while reducing overall complexity.
Solution Approach 2:
The cam profiles are dynamically designed with varying geometries to provide precise control over each valve's opening and closing timing. The dynamic shape of each cam segment ensures that despite being driven by a single motor, each valve receives the exact actuation force and timing required for precise chemical dosing control.
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 precise and safe delivery of chemicals to pool water, preventing equipment damage and ensuring consistent water quality through automated control and isolation of chemicals from non-sealed parts, enhancing safety and efficiency in pool maintenance.
Implementation Method 1
a diaphragm sealingly isolating the fluid inlet of the fluid flow housing from the valve actuator
Implementation Method 2
a cam shaft and motor, such that actuation of the motor selectively opens respective valves to allow selected water treatment substances to flow
Implementation Method 3
each coupled to one of the plurality of valve actuators and having a spring biasing the plurality of valve rods away from the valve actuators against the housing
Implementation Method 4
the diaphragm coupled to each of the plurality of valve rods such that movement of one of the plurality of valve rods causes resilient deformation of the diaphragm
Data Source
AI summary
A multi-valve water treatment system may include a motor having an output shaft, a driven shaft fixed to the output shaft and having a cam disposed at an axial position along the driven shaft, and a valve assembly. The valve assembly may include a valve actuator urged into engagement with the driven shaft at the axial position, a fluid flow housing having a fluid outlet and at least one fluid inlet selectively sealingly engaged by the valve actuator to define a valve configured to selectively allow a flow of fluid from the fluid inlet toward the fluid outlet depending on the relative positions of the driven shaft and the valve actuator; and a diaphragm sealingly isolating the fluid inlet of the fluid flow housing from the valve actuator.