Electronic Switch Gas Inflow Space Arc Suppression
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Solution Overview
Problem
Existing electronic switches suffer from rapid arcing and potential damage to contact points due to slow separation of fixed and movable contact points, leading to high temperature arcs and reduced durability and reliability.
Innovation Solution
Incorporation of gas inflow spaces in the contact points, where gas flows in during contact and is exhausted during separation, utilizing the increased pressure to rapidly and uniformly separate the contacts, minimizing arc-induced damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the movable contact point is separated from the fixed contact point only by the elastic power of the return spring, then the structure is simple, but the separation speed is slow causing high temperature arcs and contact point damage
Solution Approach 1:
The patent introduces gas (typically sulfur hexafluoride or nitrogen) into the contact chamber to create a pneumatic environment that suppresses arc formation. The gas acts as an insulating medium that prevents ionization and arc discharge between the separating contact points, thereby eliminating arc damage while maintaining simple mechanical separation mechanism.
Solution Approach 2:
The patent creates an inert atmosphere within the contact chamber by filling it with chemically inert gas. This inert environment prevents the formation of conductive plasma paths during contact separation, suppressing arc generation and protecting the contact points from thermal and erosive damage without requiring faster mechanical separation.
2Reliability
If gas is introduced into the contact chamber to suppress arcs, then arc damage is reduced, but the device complexity increases
Solution Approach 1:
The patent employs a self-service approach where the gas is permanently sealed within the contact chamber during manufacturing. The contact points and gas chamber form an integrated hermetic system that requires no external gas supply mechanisms, valves, or pressure control systems. The gas automatically performs arc suppression whenever contacts operate, eliminating the need for active gas management systems and maintaining simple device architecture.
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 solution enables rapid and reliable separation of contact points, reducing arcing-induced damage and enhancing the durability and operation reliability of the electronic switch.
Implementation Method 1
the magnetic field is generated from the coil and the movable core moves toward the fixed core while overcoming the elastic force of the return spring by Fleming's left-hand rule
Implementation Method 2
a return spring for applying elastic force to the movable core in order to allow the movable core to move away from the fixed core
Implementation Method 3
the gas in the at least one gas inflow space is exhausted to the space where the fixed and movable contact points make contact with or are separated from each other while the fixed and movable contact points are separated from each other
Data Source
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AI summary
An electronic switch 100 includes a fixed contact point 120; a movable contact point 140 making contact with or separated from the fixed contact point 120; and an actuating unit 150 for moving the movable contact point in order to allow the movable contact point to make contact with or to be separated from the fixed contact point, wherein at least one gas inflow space 121 is formed in at least one of the fixed and movable contact points 120, 140; a gas which is injected into a space where the fixed and movable contact points make contact with or are separated from each other flows into the at least one gas inflow space 121 while the fixed and movable contact points make contact with each other, and the gas in the at least one gas inflow space is exhausted to the space where the fixed and movable contact points make contact with or are separated from each other while the fixed and movable contact points are separated from each other.