Piezoelectric Pump Cavity Design for Flow Rate
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Pumps that utilize a piezoelectric body and vibrating plates to manage fluid flow rates and pressures are inadequate in achieving sufficient performance due to insufficient flow rates and pressures.
Innovation Solution
A pump design featuring a vibrating plate with a piezoelectric body, a cover with strategically positioned cavities, and a support structure that enhances displacement and flexibility, allowing for phase opposition between the center and outer edges of the vibrating plate to create a significant static pressure difference for improved fluid flow and pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a pump uses a vibrating plate with a piezoelectric body to suck or pressurize fluid, then the pump structure is simplified, but the pump flow rate and pressure are insufficient
Solution Approach 1:
The patent applies local quality by positioning cavities at specific locations on the top panel that correspond to regions of the vibrating plate with smaller displacement amounts. This localized cavity placement creates targeted pressure differences in specific areas, enabling sufficient pump flow rate and pressure while maintaining the simplified vibrating plate structure.
Solution Approach 2:
The patent introduces a vertical dimension by creating cavities that extend through the top panel, forming a three-dimensional cavity structure. This vertical dimension allows fluid to be drawn into and discharged from the pump chamber more effectively, improving pump performance without complicating the horizontal vibrating plate structure.
2Device complexity
If a pump uses a vibrating plate with a piezoelectric body to suck or pressurize fluid, then the pump structure is simplified, but the pump pressure is insufficient
Solution Approach 1:
The patent applies local quality by positioning cavities at specific locations on the top panel that correspond to regions of the vibrating plate with smaller displacement amounts. This localized cavity placement creates targeted pressure differences in specific areas, enabling sufficient pump flow rate and pressure while maintaining the simplified vibrating plate structure.
Solution Approach 2:
The patent segments the top panel by incorporating multiple cavities at different locations, allowing different regions to contribute to pressure generation. This segmentation creates multiple pressure zones that work together to achieve sufficient overall pump pressure without requiring a more complex pump structure.
3Productivity
If the first cavity in the top panel is located to oppose a portion of the vibrating plate having a displacement amount smaller than the outer peripheral edge, then fluid flow is improved, but the cavity placement becomes more specific and complex
Solution Approach 1:
The patent applies local quality by positioning cavities at specific locations on the top panel that correspond to regions of the vibrating plate with smaller displacement amounts. This localized cavity placement creates targeted pressure differences in specific areas, enabling sufficient pump flow rate and pressure while maintaining the simplified vibrating plate structure.
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 design significantly enhances pump performance by increasing flow rates and pressures through optimized cavity placement and support flexibility, preventing backflow and reducing air resistance, thereby improving overall fluid handling capabilities.
Implementation Method 1
a vibrating plate having a piezoelectric body on a first main surface
Data Source
AI summary
A pump includes a vibrating plate having a piezoelectric body on a first main surface, a cover including a top panel and a side wall, the top panel opposing a second main surface of the vibrating plate opposite to the first main surface, the top panel having a first cavity, and the side wall being connected to an outer peripheral portion of the top panel to surround a space between the top panel and the vibrating plate, a support portion connected to the side wall and supporting an outer periphery of the vibrating plate, and a second cavity formed between the side wall and the vibrating plate in a cross-sectional view in a direction orthogonal to a direction in which the second main surface of the vibrating plate and a main surface of the top panel oppose each other.