Pyrotechnic Relief Valve Venting Without Extra HVAC Joints
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Solution Overview
Problem
Conventional relief valves in HVAC systems increase the number of system joints, leading to potential leak points and higher costs, as they must be in fluid communication with the closed-loop system conduits.
Innovation Solution
A relief valve design featuring a housing with a pyrotechnic actuation mechanism that shears a conduit end cap to establish fluid communication with the housing, reducing the need for additional joints and minimizing leak points by aligning inlet and outlet ports concentrically to facilitate rapid fluid venting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional relief valves are used to vent refrigerant from closed-loop systems, then the refrigerant can be vented safely, but the number of system joints increases leading to more potential leak points and higher costs
Solution Approach 1:
The relief valve is integrated directly into the closed-loop system by combining it with existing conduit ends. The valve housing receives conduit ends directly, eliminating the need for separate external relief valve installations and their associated connection joints. This merging approach maintains refrigerant containment functionality while reducing the total number of joints in the system.
2Ease of operation
If conventional relief valves are installed in fluid communication with system conduits, then venting functionality is achieved, but the overall cost of the system increases
Solution Approach 1:
The relief valve housing is designed to serve multiple functions: it provides the venting mechanism, receives conduit ends directly, and integrates with the existing system architecture. This multi-functionality eliminates the need for separate components and reduces overall system cost while maintaining full venting capability.
3Speed
If the relief valve uses a pyrotechnic actuation mechanism to shear the conduit end cap, then rapid fluid venting is achieved, but the complexity of the actuation mechanism increases
Solution Approach 1:
The pyrotechnic actuation mechanism replaces complex mechanical actuation systems with a chemical energy-based shearing mechanism. The initiator uses pyrotechnic composition to rapidly shear the conduit end cap, achieving fast venting without the need for complex mechanical linkages, motors, or actuators that would be required for equivalent speed using purely mechanical means.
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
This design effectively vents refrigerant from both high and low-pressure sides of a refrigeration system without increasing the number of system joints, thereby reducing leak points and system costs while ensuring safe refrigerant containment.
Implementation Method 1
An initiator may be disposed within the housing and an engagement member may be slideably disposed within the housing and may be moveable between a retracted position and an extended position under force of the initiator
Data Source
AI summary
A relief valve is provided and may include a housing having a first inlet port and a second inlet port. An initiator may be disposed within the housing and an engagement member may be slideably disposed within the housing and may be moveable between a retracted position and an extended position under force of the initiator. The engagement member may include a first bore aligned with the first inlet port in the extended position and a second bore aligned with the second inlet port in the extended position.