Shape Memory Polymer Conduits for Automated Fluid Flow Regulation
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Solution Overview
Problem
Existing fluid distribution systems face challenges with manual operation difficulties, increased response times, and high costs due to complex designs and mechanical failures in traditional and SMA actuated valves, which require additional equipment and can leak.
Innovation Solution
The use of shape memory polymers (SMPs) in conduits that change properties with thermal activation signals to regulate fluid flow, eliminating the need for manual operation and reducing component complexity and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If traditional valves are used for fluid flow regulation, then the system structure is simple, but the response time is slow and manual operation is required
Solution Approach 1:
The patent replaces traditional mechanical valves with a shape memory polymer conduit that uses thermal stimulation to control fluid flow. The SMP conduit changes its shape or properties in response to thermal signals, eliminating the need for mechanical valve components and manual operation while achieving rapid automated response.
Solution Approach 2:
The SMP conduit performs automatic flow regulation in response to thermal stimuli without requiring external mechanical actuation or manual intervention. The material's intrinsic shape memory properties enable it to self-regulate fluid flow based on thermal conditions, providing autonomous control.
2Speed
If SMA actuated valves are used for fluid flow regulation, then the response time is quick and sensitivity is improved, but the manufacturing cost is significantly higher and design is more complex
Solution Approach 1:
The patent changes the material parameter from shape memory alloy to shape memory polymer. This substitution maintains the rapid response characteristics of SMA materials while dramatically reducing manufacturing costs and design complexity. The SMP conduit can be fabricated using conventional polymer processing techniques rather than precision metalworking required for SMA components.
Solution Approach 2:
The invention utilizes shape memory polymer materials that combine the desirable rapid response properties of smart materials with the manufacturing advantages of polymers. This material selection achieves a balance between performance and manufacturability, avoiding the high costs associated with metallic SMA components.
3Reliability
If SMA actuated valves are used for fluid flow regulation, then the response time is quick, but mechanical parts may fail over time and metal components may corrode
Solution Approach 1:
The patent extracts and eliminates all mechanical valve components from the system. By using a shape memory polymer conduit that directly responds to thermal stimuli, the invention removes seals, springs, actuators, and other mechanical parts that are prone to failure and corrosion, leaving only the SMP material itself to perform the flow regulation function.
Solution Approach 2:
The invention replaces the entire mechanical valve system with a thermally-responsive polymer conduit. This substitution eliminates mechanical wear, corrosion, and component failure modes inherent in traditional valve designs, significantly improving reliability while reducing the number of parts.
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
SMP-based conduits provide quick and efficient fluid flow regulation, are less expensive to manufacture, and reduce the number of components, offering a simpler and more reliable solution compared to traditional systems.
Implementation Method 1
a shape memory polymer in an amount effective to regulate fluid flow through the conduit by a change in at least one property of the shape memory polymer caused by application of a thermal activation signal
Data Source
AI summary
A method comprises applying a thermal activation signal to a conduit comprising a shape memory polymer, causing a change in at least one property of the shape memory polymer, and regulating fluid flow through the conduit by the change in the at least one property of the shape memory polymer. A conduit comprises a shape memory polymer in an amount effective to regulate fluid flow through the conduit by a change in at least one property of the shape memory polymer caused by application of a thermal activation signal. The conduits and methods disclosed herein may find use as drinking utensils, respirator tubes, pump intake tubes, motor vehicle cooling system bypass hoses, motor vehicle engine oil filter bypass hoses, or motor vehicle powertrain fluid circulation hoses.