Solenoid Valve Flow Path Geometry for Lower Gas Pressure Loss
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Solution Overview
Problem
Conventional solenoid valves experience significant pressure loss when opened due to right-angle bends in the gas flow passages and a narrow gas accumulation space, leading to increased 'bending loss' and 'contraction loss' during gas flow.
Innovation Solution
The solenoid valve design incorporates an annular valve seat that protrudes from the columnar body, forming part of the gas accumulation space, with acute-angled outflow passages and a larger gas accumulation space, allowing the valve body to sit on the seat, reducing pressure losses by minimizing bending and contraction losses through optimized geometry and dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If right-angle bends are used in gas flow passages, then manufacturing is simplified, but pressure loss increases due to bending loss
Solution Approach 1:
The patent changes the geometric parameters of the gas flow passages by replacing right-angle bends with acute-angle bends (less than 90 degrees). This parameter modification reduces the bending loss and pressure loss while maintaining manufacturing feasibility through standard machining processes.
2Volume of stationary object
If gas accumulation space is made narrow, then device size is reduced, but pressure loss increases due to contraction loss
Solution Approach 1:
The patent optimizes the geometric parameters of the gas accumulation space by defining specific dimensional relationships (distances of 0.5 times and 1.0 times the maximum inner diameter). These parameter changes increase the effective accumulation space volume to reduce contraction loss while controlling overall device size.
3Loss of energy
If valve seat protrusion is increased, then gas accumulation space is improved, but manufacturing complexity increases
Solution Approach 1:
The patent defines specific parameter ranges for the valve seat protrusion height (0.3 times or more the maximum inner diameter) and the gas accumulation space dimensions. These standardized parameter specifications improve pressure loss characteristics while maintaining manufacturing feasibility through precise but not overly complex machining operations.
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 significantly improves pressure loss characteristics by reducing 'bending loss' and 'contraction loss', enabling smoother gas discharge and improved efficiency when the valve is opened, with specific geometric conditions enhancing cross-sectional areas and protrusion heights contributing to better performance.
Implementation Method 1
there is provided an electromagnetic coil 73 configured to apply the electromagnetic force to the movable core 70 in order to move the movable core 70 toward the stationary core 60 against a biasing force of the spring 65
Implementation Method 2
there is provided a spring 65 configured to bias the movable core 70 in a direction in which the movable core 70 is moved away from the stationary core 60 in order to cause the valve body 75 to sit
Data Source
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AI summary
A valve seat, which a valve body of a movable core sits on, protrudes from an outside region of the valve seat located at an end of a columnar body toward the movable core. A gas flow passage in the movable core has: an inflow passage extending on a stationary core side in the direction in which the movable core moves; and two or more outflow passages branched on a valve body side from the inflow passage each of which extends in a direction forming an acute angle relative to the direction in which the movable core moves. A protrusion height of the valve seat is 0.3 times or more an inner diameter of the outflow passages. A gas accumulation space is formed such that, in a state in which the valve body sits on the valve seat, the gas accumulation space includes: a region located away from the movable core by a distance 0.5 times or more the inner diameter of the outflow passage, as seen along a line extended from a stationary-core-side edge of each outflow passage in the direction in which the outflow passage extends; and a region located away from the movable core by a distance greater than or equal to the inner diameter of the outflow passage, as seen along a line extended from a valve-body-side edge of each outflow passage in the direction in which the outflow passage extends.