Shuttle Piston Valve Assembly for Single-Drive Water Softeners
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Solution Overview
Problem
Conventional water softener systems require two piston assemblies and drives to perform regeneration and service/standby cycles, leading to increased manufacturing costs due to the need for additional motors and drives.
Innovation Solution
A single piston assembly for a water softener control valve is designed, incorporating a shuttle piston and latching mechanism that allows for both regeneration and service/standby cycles, eliminating the need for external solenoids or additional piston assemblies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two piston assemblies and drives are used to perform regeneration and service/standby cycles, then the system can perform both cycles, but the manufacturing cost increases due to additional motors and drives
Solution Approach 1:
The single piston assembly is designed to perform multiple functions by incorporating a shuttle piston that can be positioned in different locations to enable both regeneration cycles and service/standby cycles. The piston assembly includes a main piston and a shuttle piston that work together to control fluid flow paths for different operational modes, eliminating the need for separate piston assemblies for each cycle type.
Solution Approach 2:
The piston assembly is divided into separate components including a main piston and a shuttle piston that can move independently relative to each other. This segmentation allows each piston to perform specific functions while working together to achieve multiple cycle types, reducing the overall number of piston assemblies needed in the system.
2Adaptability or versatility
If two piston assemblies are used, then both regeneration and service/standby cycles can be performed, but the system cost increases
Solution Approach 1:
The invention merges the functionality of two separate piston assemblies into a single integrated piston assembly. The main piston and shuttle piston are combined in one assembly that can perform both regeneration and service/standby cycles, thereby reducing the total number of motors and drives required and lowering manufacturing costs.
Solution Approach 2:
The single piston assembly is designed as a universal component capable of performing multiple cycle types through the coordinated movement of the main piston and shuttle piston, eliminating the need for multiple specialized piston assemblies and reducing overall system cost.
3Device complexity
If a single piston assembly is used, then manufacturing cost is reduced, but the system must perform both regeneration and service/standby cycles with one assembly
Solution Approach 1:
The piston assembly incorporates dynamic elements including a shuttle piston that can move to different positions along the piston rod, allowing the assembly to adapt its configuration for different cycle types. The dynamic repositioning of the shuttle piston enables the single assembly to perform both regeneration and service/standby cycles effectively.
Solution Approach 2:
The piston assembly is segmented into a main piston and a movable shuttle piston, allowing independent movement and positioning of each component. This segmentation provides the flexibility needed for a single assembly to perform multiple cycle types by configuring the relative positions of the segmented components.
Data Source
AI summary
Embodiments of the invention provide a piston assembly for a control valve in a water softener system. The control valve includes a drive mechanism, one or more fluid passageways, and a seal assembly. The piston assembly includes a main piston moveably received within the seal assembly and including a first end and a second end opposite to the first end, and a shuttle piston moveably received within the seal assembly. The shuttle piston includes a first end and a second end opposite to the first end, and is configured to selectively engage the second end of the main piston to form a seal therebetween and to selectively move relative to the second end of the main piston to form an opening between the second end of the main piston and the first end of the shuttle piston, in response to movement of the main piston.