Bi-directional Pump Valve Synchronization for Fluid Control
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Solution Overview
Problem
Existing fluid flow control devices lack efficient mechanisms for synchronizing bi-directional fluid flow with the alternating phases of a pump cycle, leading to inconsistent pressure and flow rates, particularly in applications requiring precise control of fluid dispensing and measurement.
Innovation Solution
A bi-directional pump system with a common fluid flow port that operates in continuous cycles, utilizing an electrically-actuated valve synchronized with a detector to connect and disconnect the utility port from the pump's pressure and vacuum phases, ensuring continuous positive or negative fluid flow, and optionally controlling flow rate and volume through precise valve actuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a bi-directional pump with mechanical valves is used to control fluid flow, then both positive and negative pressure flow can be achieved, but the fluid flow control is inconsistent and lacks precision due to cyclic alternation between pressure and vacuum phases
Solution Approach 1:
The patent applies periodic action by using a detector to sense the cyclic position of the pump's moving element and synchronizing the valve actuation with each pressure and vacuum phase. This ensures that the valve opens and closes at precise intervals during each pump cycle, transforming the inherently periodic pump operation into controlled, consistent fluid flow delivery.
Solution Approach 2:
The patent implements feedback by using a detector to continuously monitor the position of the pump's cyclically moving element and using this information to control the timing of valve actuation. This closed-loop feedback system ensures that the valve operates in synchronization with the pump phases, maintaining precise and consistent fluid flow control despite the cyclic nature of the pump.
2Adaptability or versatility
If mechanical valves are used in the pump to create sustained pressure and vacuum, then bi-directional fluid flow is achieved, but the system complexity increases due to multiple internal mechanical components
Solution Approach 1:
The patent introduces an intermediary electrically-actuated valve positioned between the pump and the utility port. This intermediary valve simplifies the overall system by providing precise electronic control of fluid flow timing, replacing the need for complex mechanical valve synchronization within the pump itself. The intermediary valve acts as a mediator that translates the pump's mechanical cyclic operation into controlled fluid delivery.
Solution Approach 2:
The patent replaces mechanical valve control with an electrically-actuated valve controlled by electronic signals from a detector and control circuitry. This substitution of mechanical control mechanisms with electronic control simplifies the system by eliminating the need for complex mechanical synchronization mechanisms while maintaining precise control over fluid flow timing and direction.
3Device complexity
If the valve is manually controlled by operator input, then simple device structure is maintained, but the fluid flow control precision and synchronization with pump phases deteriorates
Solution Approach 1:
The patent uses feedback by implementing a detector that continuously monitors the position of the pump's cyclically moving element and uses this information to automatically control the valve actuation timing. This feedback mechanism ensures precise synchronization between the valve operation and the pump phases, achieving accurate flow rate control without requiring complex manual coordination.
Solution Approach 2:
The system achieves self-service by having the detector automatically sense the pump phase and trigger valve actuation without requiring manual operator intervention for timing control. The system self-regulates the valve operation based on real-time detection of pump position, maintaining precise control while simplifying the user interface to basic activation inputs.
Data Source
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AI summary
A method and apparatus for controlling bi-directional fluid flow. The apparatus has a pump (20) that operates in a continuous pump cycle having a pressure phase and a vacuum phase. A conduit (19) connects a common pump port to a utility port (29). An electrically- controlled valve (22) regulates air flow through the conduit. The valve operates between a first position isolating the pump and the utility port, and a second position connecting the pump and the utility port in fluid communication. A detector (18) continuously detects and communicates a signal identifying whether the pump is operating in the pressure or vacuum phase of the pump cycle A controller (24) uses the detector signal to synchronize actuation of the valve with the pump cycle to generate either continuous positive or continuous negative pressure at the utility port