Miniature Pump Wall Body Guide Structure
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Solution Overview
Problem
Miniature pumps face efficiency issues due to low motor efficiency and risk of damage from piston module deviation, causing the outer wall to rub against the cylinder, leading to malfunction.
Innovation Solution
A miniature pump design featuring a cylinder, piston module, and wall body where the wall body partially surrounds the pumping chamber near the first end, preventing deviation and direct contact between the piston module and cylinder, and incorporating an air intake valve piece with a specific edge structure to reduce bending moments and maintain sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the piston module is placed inside the cylinder without additional protective structures, then the device complexity is reduced, but the reliability deteriorates due to piston deviation causing rubbing and damage
Solution Approach 1:
The patent introduces a protective structure (wall body or guide structure) as an intermediary element between the piston module and the cylinder. This intermediary component prevents direct contact and rubbing between the piston outer wall and cylinder inner wall, thereby protecting the piston module from damage while maintaining a relatively simple overall structure.
2Productivity
If the pumping chamber structure is designed to extend and retract fully, then the productivity is improved, but the reliability worsens due to increased risk of deviation and rubbing during movement
Solution Approach 1:
The protective wall body acts as a guide and protective intermediary that allows the pumping chamber structure to extend and retract fully for high productivity, while simultaneously preventing deviation and rubbing to ensure reliability during the movement cycle.
3Manufacturing precision
If the piston module operates without a protective wall body, then the manufacturing precision requirements are reduced, but the reliability deteriorates due to deviation causing outer wall rubbing
Solution Approach 1:
The wall body serves as a protective intermediary that compensates for lower manufacturing precision by providing mechanical guidance and preventing deviation, thereby maintaining reliability without requiring extremely high alignment precision between the piston module and cylinder.
Data Source
AI summary
A miniature pump includes a cylinder, a piston module, a driving module and a wall body. The cylinder has a first end and a second end opposite to each other along a direction. The piston module is accommodated in the cylinder. The piston module has at least one pumping chamber structure protruded towards the second end, and the pumping chamber structure is able to extend or retract along the direction. The driving module is located at the second end and connected to the pumping chamber structure, configured to drive the pumping chamber structure to extend or retract along the direction. The wall body at least partially surrounds a position of the pumping chamber structure near the first end, and is located between the cylinder and the pumping chamber structure.