3-Stage Temperature Control Valve Pressure Management
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Solution Overview
Problem
Existing restrictive valves face challenges in managing high water pressure differentials, leading to inefficiencies and increased costs due to the need for stronger, more expensive materials, and they do not effectively control fluid temperature, resulting in wasted water and energy.
Innovation Solution
A temperature-controlled restrictive valve with a 3-stage piston mechanism that balances fluid pressure differentials, using a paraffin actuator to advance the piston based on temperature, allowing the valve to be made of less expensive materials like plastic, with only one moving part and a resettable release mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional restrictive valves are used to manage high water pressure differentials, then the valve can withstand the pressure, but the valve requires stronger and more expensive materials
Solution Approach 1:
The patent replaces the traditional mechanical pressure-balancing mechanism with a temperature-responsive elastomeric member that automatically adjusts flow based on water temperature. This eliminates the need for complex mechanical components designed to withstand high pressure differentials, allowing the use of less expensive materials while maintaining pressure management capability.
Solution Approach 2:
The patent changes the control parameter from mechanical pressure balancing to temperature-responsive material properties. The elastomeric member's flow control characteristics change based on water temperature, allowing the valve to manage pressure differentials without requiring strong materials, as the control mechanism is decoupled from the pressure-withstanding structure.
2Device complexity
If conventional valves without temperature control are used, then the valve structure is simpler, but water and energy are wasted due to delayed temperature control
Solution Approach 1:
The patent implements a self-service temperature control system where the elastomeric member automatically responds to water temperature changes without requiring external control mechanisms. The material's inherent temperature-responsive properties enable automatic flow adjustment, eliminating the need for complex actuators, sensors, or control systems while preventing water and energy waste.
Solution Approach 2:
The patent utilizes phase transitions or property changes in the elastomeric material in response to temperature changes. As water temperature increases, the elastomeric member changes its physical properties to restrict flow, and vice versa. This passive phase-transition-based control achieves temperature management without adding structural complexity.
3Stress or pressure
If high pressure differentials are managed by traditional means, then pressure control is achieved, but the valve requires stronger materials increasing cost
Solution Approach 1:
The patent extracts the pressure management function from the flow control mechanism. The elastomeric member is designed to withstand pressure differentials without being the primary control element for pressure balancing. By separating these functions, the valve body and elastomeric member can be made from less expensive materials while still managing high pressure differentials effectively.
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 valve effectively manages pressure differentials and temperature control, reducing material costs and energy waste by allowing fluid flow only when necessary, thus conserving water and energy while meeting ASTM certification for high pressure.
Implementation Method 1
A temperature controlled actuator, such as paraffin actuator, is configured to axially advance the piston as a function of the fluid temperature
Implementation Method 2
A piston spring is biased against the piston, and which spring force is overcome when the upstream fluid pressure is permitted to be provided to a proximal end of the piston
Data Source
AI summary
A temperature control valve that effectively manages fluid pressure therethrough, including pressure differentials which may exist therein, such as from the upstream port to the downstream port, and about a piston slidingly disposed therewithin proximate a fluid flow path. In one embodiment a 3 stage valve is provided whereby fluid flows therethrough when the piston is in a first position, fluid flow is inhibited in a second piston position, and an override third position whereby fluid flows therethrough. When the piston is in the second position, the fluid pressure differential across the piston is balanced and an axial spring force on the piston is relatively small, thereby reducing any subsequent axial force required to advance the piston to the third free flow position, and allowing the valve to be comprised of cheaper materials including plastic.