Magnetic Latching Valve Exhaust Sealing Against Debris Ingestion
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Solution Overview
Problem
Conventional fluid control valves with porous plugs are inadequate in preventing the ingestion of damaging substances such as water or debris into the valve, particularly in environments like vehicles or trucks where exposure to tire spray, road splash, or pressure washing is common, leading to potential corrosion and malfunction.
Innovation Solution
A magnetic latching valve with an enhanced exhaust configuration, featuring a solenoid coil, an armature, a retainer, and a seal at the exhaust port, which allows fluid to be vented while preventing the ingestion of debris or foreign substances by expanding the seal to allow fluid to flow around it and be vented to the external environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a porous plug is used at the exhaust port, then gas flow to the external environment is allowed, but the plug is insufficient to prevent ingestion of damaging substances like water or debris
Solution Approach 1:
The patent introduces a retainer as an intermediary component at the exhaust port, which holds a seal that actively prevents damaging substances from entering the valve while still allowing exhaust gas to escape. This retainer-seal mechanism serves as a mediator between the exhaust function and the protection function, resolving the contradiction by providing robust protection without compromising exhaust flow.
2Productivity
If the seal is expanded to allow fluid to flow around it, then fluid can be vented to the external environment, but this might compromise the seal's ability to prevent ingestion
Solution Approach 1:
The patent employs a dynamic seal that can expand and contract based on operating conditions. During normal operation, the seal expands to provide a tight barrier against damaging substances. During exhaust operations, the seal dynamically adjusts to allow fluid flow around it while maintaining its protective function, thus resolving the contradiction between venting capability and protection reliability.
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 enhanced exhaust configuration effectively prevents the ingestion of damaging substances while allowing air or gas to be vented from the valve, thereby enhancing the valve's ability to operate reliably in harsh environments without risking corrosion or malfunction.
Implementation Method 1
a solenoid coil having a cavity; an armature movable in the cavity of the solenoid coil; as a signal having a particular polarity energizes the solenoid coil, a solenoid force is applied to the armature, causing the armature to move axially
Implementation Method 2
a seal mounted to the retainer, wherein as a signal having a particular polarity energizes the solenoid coil, a solenoid force is applied to the armature, causing the armature to move axially in the proximal direction to a particular position, allowing fluid flow from the outlet port, through the retainer, expanding the seal to allow fluid to flow around the seal
Data Source
AI summary
An example valve includes: a plurality of ports including an inlet port, an outlet port, and an exhaust port; a solenoid coil having a cavity; an armature movable in the cavity of the solenoid coil; a retainer mounted at the exhaust port; and a seal mounted to the retainer, wherein as a signal having a particular polarity energizes the solenoid coil, a solenoid force is applied to the armature, causing the armature to move axially in the proximal direction to a particular position, allowing fluid flow from the outlet port, through the retainer, expanding the seal to allow fluid to flow around the seal to be vented to an external environment, while preventing ingestion of foreign substances.