Valve Body Pressure Gradient Gas Flow Control
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Solution Overview
Problem
Existing fluid control devices for gas flow management, such as those used in suction devices, require additional components like pressure sensors and electromagnetic valves to prevent tube closure during suction, leading to increased device size and cost, and lack the ability to perform passive suction and pressure release.
Innovation Solution
A valve configuration with a valve housing and body that utilizes pressure differences across multiple ventilation holes to control gas flow, allowing for passive suction and pressure release without the need for additional components, by switching communication states between ventilation holes based on pressure differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pressure sensors, flowmeters, and electromagnetic valves are added to provide safety function, then reliability is improved, but device complexity and cost increase
Solution Approach 1:
The valve body automatically detects pressure differences between the container and atmosphere, and self-regulates the ventilation holes without external control systems. The movable portion responds directly to pressure changes, eliminating the need for pressure sensors, flowmeters, and electromagnetic valves while maintaining safety functionality.
2Reliability
If multiple components are added for safety function, then reliability is improved, but manufacturing cost increases
Solution Approach 1:
The safety function is merged into the valve body structure itself. The movable portion, ventilation holes, and pressure-sensing capability are integrated into a single component, eliminating the need for separate pressure sensors, flowmeters, and electromagnetic valves, thereby reducing manufacturing cost.
3Device complexity
If passive pressure release is implemented without additional components, then device complexity is reduced, but control precision may worsen
Solution Approach 1:
The movable portion is designed with specific local geometries that respond to pressure differences. The ventilation holes are positioned and sized to provide precise control over gas flow paths. This local structural design enables accurate passive control without requiring complex external systems.
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
Enables efficient fluid suction and passive pressure release in a compact and cost-effective manner, reducing power consumption and eliminating the need for specialized sensors and valves, while allowing for easy detection of filter clogging through audible signals.
Implementation Method 1
when a pressure in the first region is higher than a pressure in the second region, the valve body blocks communication between the second ventilation hole and the third ventilation hole and communicates the first ventilation hole and the second ventilation hole with each other
Data Source
AI summary
A fluid control device includes a piezoelectric pump, an inhaler, and a valve. The piezoelectric pump has a gas suction hole and a gas discharge hole. The inhaler has a container, an inhalation port, and a connection hole. The valve has a first ventilation hole, a second ventilation hole, a third ventilation hole, a first valve housing, a second valve housing, and a valve body. The first ventilation hole of the valve is connected to the connection hole of the inhaler. The second ventilation hole of the valve is connected to the suction hole of the piezoelectric pump. The third ventilation hole of the valve is opened to the atmosphere. The valve body is held between the first valve housing and the second valve housing, and configures a first region and a second region.