Pump Device Valve Mechanism for Gas Discharge Control
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Solution Overview
Problem
Conventional booster blowers lack the ability to control gas discharge at reduced pressures, leading to potential system issues when the operation is stopped, as gas introduced at higher pressures can be discharged unintentionally.
Innovation Solution
A pump device with a casing, movable member, first valve, second valve, and third valve configuration, where the third valve limits gas flow from the suction port to the discharge port when the pressure is lower than a predetermined second pressure, preventing uncontrolled discharge during operation cessation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional booster blower is used without additional valves, then the device structure remains simple, but gas discharge cannot be controlled when the operation is stopped, leading to potential system problems
Solution Approach 1:
The third valve is integrated into the existing discharge port structure, serving dual functions: controlling gas discharge during normal operation and preventing backflow when the pump is stopped. This multi-functionality approach improves system reliability without proportionally increasing device complexity
Solution Approach 2:
The third valve acts as an intermediary component between the discharge port and the external system, mediating gas flow control. It prevents direct uncontrolled discharge by introducing a controllable intermediate element that responds to pressure differential changes during operation and shutdown
2Object-generated harmful factors
If the third valve is added to limit gas flow at reduced pressure, then gas discharge is controlled during shutdown, but the device complexity increases
Solution Approach 1:
The third valve is positioned specifically at the discharge port where gas leakage control is most critical. By applying the valve mechanism locally at this key location rather than throughout the entire system, gas leakage is prevented without unnecessarily complicating the overall device structure
Solution Approach 2:
The third valve responds to changes in pressure parameters, automatically opening when discharge pressure exceeds the second pressure threshold and closing when pressure drops below this threshold. This parameter-based control mechanism prevents gas leakage through passive pressure-responsive operation rather than active control 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
The solution effectively suppresses unintended gas discharge when the pump is stopped, ensuring stable pump performance and preventing system problems due to gas leakage, while allowing controlled gas flow at appropriate pressures.
Implementation Method 1
the movable member is movable within the casing and alternately performs suction of a gas into the pump chamber and discharge of the gas from the pump chamber
Implementation Method 2
The third valve is attached to the discharge port and limits a flow of the gas toward the discharge port from the suction port in a case where the gas between the suction port and the discharge port has a second pressure or lower
Data Source
AI summary
[Object] To provide a pump device capable of limiting discharge of a fluid when the operation is stopped. [Solving Means] A pump device (3) includes a casing (10), a movable member (30), a suction valve (41), a discharge valve (42), and a valve mechanism (50). The casing (10) includes a suction port (101), a discharge port (102), and a pump chamber (100). The movable member (30) is movable within the casing (10) and alternately performs suction and discharge of a fluid into and from the pump chamber (100). The discharge valve (42) is attached between the pump chamber (100) and the discharge port (102) and permits the fluid having a first pressure or higher to flow. The valve mechanism (50) is attached to the casing (10) and limits a flow of the fluid having a second pressure or lower.