Fluid Pump Switching Pressure Suction Modes
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Solution Overview
Problem
Existing water jet devices for cutting biological structures, such as those used in liposuction, face challenges in maintaining a consistent fluid flow over extended periods due to high structural complexity and the need for frequent interruptions to reposition tools, leading to inefficiencies in fluid usage and increased manufacturing costs.
Innovation Solution
A method and device that automatically switch between pressure and suction modes using a simple piston-cylinder pump, allowing continuous fluid flow by detecting interruptions and switching to suction mode until the flow resumes, ensuring maximum fluid volume availability without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single piston-cylinder unit is used to generate both pressure and suction, then device complexity is reduced, but the ability to maintain continuous fluid flow over extended periods deteriorates
Solution Approach 1:
The pump operates in periodic cycles, alternating between a pressure-generating phase (piston moving in first direction) and a suction-generating phase (piston moving in second direction). This periodic operation allows the single piston-cylinder unit to maintain continuous fluid supply by refilling during suction phases and delivering during pressure phases, resolving the contradiction between simple structure and continuous flow capability.
2Quantity of substance
If the pump operates in continuous pressure mode, then fluid flow is maintained, but the ability to refill the cylinder during interruptions deteriorates
Solution Approach 1:
The pump ensures continuous useful action by automatically switching between pressure and suction modes. During any interruption in fluid delivery, the pump transitions to suction mode to refill the cylinder, ensuring that the fluid supply is continuously replenished without manual intervention. This maintains both adequate fluid volume and operational efficiency throughout extended use.
3Productivity
If automatic switching between pressure and suction modes is implemented, then operational efficiency is improved, but device complexity increases
Solution Approach 1:
The pump system is designed to automatically detect flow interruptions and self-switch between pressure and suction modes without external control mechanisms. The system monitors its own operational state and autonomously transitions between phases, achieving high productivity while minimizing control complexity through self-regulating operation.
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 solution enables a consistent and efficient fluid flow over extended periods with reduced manufacturing costs and complexity, minimizing the need for frequent interruptions and ensuring reliable fluid supply during medical or surgical procedures.
Implementation Method 1
the fluid is pressurized by a pump
Implementation Method 2
an operating mode for generating a suction effect can be implemented
Data Source
AI summary
The invention relates to a method for conveying a fluid for the purpose of generating a fluid jet (25), in which the fluid is pressurized by a pump (2) and supplied to an outlet opening (11) at a specific volume flow rate, wherein, in the event of an interruption of the volume flow, the pump (2) is automatically switched from an operating mode for pressure generation to an operating mode for suction generation for the purpose of drawing in fluid.The invention further relates to a device for generating a volume flow for the purpose of realizing a fluid jet for cutting and/or rinsing solid material or pasty soft material, which comprises a pump (2) by means of which an operating mode for pressure generation in the fluid and an operating mode for suction generation can be realized, wherein the device is designed such that, in the event of an interruption of the set volume flow, the pump (2) can be automatically switched from the operating mode for pressure generation to an operating mode for suction generation for the purpose of drawing in fluid.