Electromagnetic Valve with Periodic Current for Low-Noise Pressure Regulation
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Solution Overview
Problem
Existing valves face challenges in effectively and reliably reducing over- and underpressures while minimizing noise and leakage, particularly in compact designs that combine passive and active operation.
Innovation Solution
A valve design featuring a single sealing seat with a movable sealing body that can be passively moved by fluid pressure and actively moved by an electromagnetic device, using a method where current strength is adjusted to match and overshoot/undershoot the spring force, allowing for slow and low-noise operation, and incorporating a rolling diaphragm for minimal leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a magnetic valve uses continuously increasing current supply during armature element movement, then the valve can be reliably closed, but noise increases and energy consumption rises
Solution Approach 1:
The patent applies periodic action by dividing the valve closing process into distinct phases: an initial phase with higher current to overcome spring force and initiate armature movement, followed by a reduced current phase for the remaining stroke. This periodic current supply pattern allows reliable valve closure while minimizing noise during the majority of the closing sequence, directly resolving the contradiction between reliability and noise generation.
Solution Approach 2:
The patent implements dynamics by making the current supply adaptive to the armature element's position and the spring force characteristics. The control system dynamically adjusts current magnitude based on real-time feedback about armature position and spring compression, optimizing the balance between ensuring reliable closure and minimizing noise and energy consumption throughout the valve operation cycle.
2Reliability
If a magnetic valve uses continuously increasing current supply during armature element movement, then the valve can be reliably closed, but energy consumption increases
Solution Approach 1:
The patent applies periodic action by dividing the valve closing process into distinct phases: an initial phase with higher current to overcome spring force and initiate armature movement, followed by a reduced current phase for the remaining stroke. This periodic current supply pattern allows reliable valve closure while minimizing noise during the majority of the closing sequence, directly resolving the contradiction between reliability and noise generation.
Solution Approach 2:
The patent implements dynamics by making the current supply adaptive to the armature element's position and the spring force characteristics. The control system dynamically adjusts current magnitude based on real-time feedback about armature position and spring compression, optimizing the balance between ensuring reliable closure and minimizing noise and energy consumption throughout the valve operation cycle.
3Volume of moving object
If a valve combines passive and active operation with a single sealing seat, then compactness is achieved, but leakage risk increases
Solution Approach 1:
The patent applies parameter changes by utilizing the phase transition capability of the shape memory alloy material. The sealing element can transition between different structural states (martensite and austenite phases) in response to temperature or stress changes, allowing it to achieve both compact sealing in the closed state and reliable opening in the active state, thus maintaining sealing reliability while enabling compact design.
Solution Approach 2:
The patent employs composite materials by integrating shape memory alloy with traditional sealing materials. This composite approach combines the compactness and active deformation capability of shape memory alloy with the reliable sealing properties of conventional materials, resolving the contradiction between compact design and leakage prevention.
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 effective and reliable pressure regulation with reduced noise and leakage, minimizing installation space, weight, and manufacturing costs, while ensuring low potential for leakage and compact design.
Implementation Method 1
currents are conducted through a coil in order to create a magnetic field, the magnetic force of which actively moves an armature element
Implementation Method 2
The sealing body has a fluid engagement surface for fluid-controlled and, thus, passive movement of the sealing body
Data Source
AI summary
A valve is provided having first and second flow channels connected by a passage. A sealing device is operable to open and close the passage to control fluid flow between the first and second flow channels. The sealing device includes a first sealing body and a second sealing body through which the passages extends. The first and second sealing bodies are biased together by a spring to close the passage. The first sealing body is passively movable by fluid and actively movable by an electromagnetic device to open the passage to permit fluid to flow between the first and second passages.