Three-Position Pneumatic Solenoid Valve With Unipolar Current Control
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Solution Overview
Problem
Pneumatic solenoid valves typically require complex actuation mechanisms and bipolar energization to achieve multiple switching positions, which complicates the realization of three distinct switching positions efficiently.
Innovation Solution
A pneumatic solenoid valve with an electromagnetic actuator that utilizes unipolar electrical energization with different current intensities to achieve three switching positions, featuring a mechanical actuation mechanism with separate sealing elements and rockers or limbs that allow independent movement, reducing the need for multiple actuators and enhancing energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If bipolar energization with polarity reversal is used to achieve multiple switching positions, then three switching positions can be realized, but the device complexity and control complexity increase
Solution Approach 1:
The patent applies parameter changes by varying the current intensity (amplitude) of the unipolar supply voltage instead of reversing polarity. The magnetic actuator responds to different current levels (first, second, and third current intensities) to achieve three distinct switching positions, thereby simplifying the control system while maintaining multi-position functionality
Solution Approach 2:
Instead of using the conventional approach of bipolar energization with polarity reversal to achieve multiple positions, the patent inverts the approach by using unipolar energization with varying current intensities. This reversal of the conventional method eliminates the need for polarity switching and reduces control complexity
2Ease of operation
If multiple actuators are used to control multiple sealing elements independently, then precise control of each air connector is achieved, but the device complexity and cost increase
Solution Approach 1:
The single magnetic actuator is designed to perform multiple functions by responding to different current intensities. It can independently control the first sealing element, the second sealing element, or both simultaneously, thereby replacing what would traditionally require multiple actuators and reducing device complexity
Solution Approach 2:
The magnetic actuator employs dynamic control through variable current intensities to achieve different switching positions and control states. By dynamically adjusting the current level, the actuator can selectively actuate different sealing elements, providing independent control without requiring multiple physical actuators
3Device complexity
If unipolar energization with different current intensities is used, then the device complexity is reduced and energy efficiency is improved, but the precision of controlling switching positions must be maintained
Solution Approach 1:
The patent maintains switching position precision by carefully selecting and controlling specific current intensity levels (first, second, and third current intensities). Each current level corresponds to a distinct switching position, ensuring precise control while using a simplified unipolar actuation mechanism
Solution Approach 2:
The system maintains precision through the inherent feedback mechanism where the magnetic actuator's position is determined by the balance between the magnetic force (dependent on current intensity) and the spring force. This self-regulating mechanism ensures accurate positioning at each switching state
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 straightforward and efficient transition between switching positions with reduced power losses, as only a single actuator is required for three switching positions, and the actuation mechanism ensures independent movement of sealing elements, improving energy efficiency and simplifying the design.
Implementation Method 1
an electromagnetic actuator which, by means of electrical energization, effects the actuation of the actuator
Implementation Method 2
a magnetic force is generated by means of a magnet coil and a switching process of the valve is triggered as a result
Data Source
AI summary
A pneumatic solenoid valve, comprising an electromagnetic actuator and an air chamber with multiple air connections configured to be connected with the interposition of the air chamber via multiple switching positions of the magnetic actuator is disclosed. The actuator is configured to assume three different switching positions by energizing the actuator in a unipolar manner with three different current intensities and to move first and second sealing element via an actuation mechanism when switching between the switching positions. In a first position, a first sealing element closes a first air connection, and a second sealing element releases a second air connection. In a second switching position, the first sealing element closes the first air connection, and the second sealing element closes the second air connection. In a third switching position, the first sealing element releases the first air connection, and the second sealing element closes the second air connection.