Electromagnetic Vibration Pump for Thin High-Pressure Airflow
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Solution Overview
Problem
Existing pumps face challenges in achieving both high discharge pressure and large flow rate while maintaining a thin thickness, with rotary motors experiencing reduced efficiency and piezoelectric elements having limited pressure and flow characteristics.
Innovation Solution
A pump utilizing a vibration actuator with a movable body supported by magnetic springs, featuring a movable wall that changes volume in a sealed chamber through reciprocating rotation, driven by electromagnetic forces to achieve high discharge pressure and flow rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the thickness of the rotary motor is reduced, then the pump thickness can be decreased, but the magnetic efficiency of the rotary motor deteriorates and characteristics significantly worsen
Solution Approach 1:
The patent replaces the rotary motor with a vibration actuator that converts electrical energy directly into vibrational motion through electromagnetic forces. This substitution eliminates the need for a traditional rotary motor structure, allowing the pump to achieve reduced thickness without compromising performance, as the vibration actuator can generate sufficient driving force in a compact form factor
Solution Approach 2:
The patent utilizes mechanical vibration as the core driving mechanism. The vibration actuator generates vibrational motion that is transmitted to the diaphragm through the swinging body, enabling the pump to achieve both thin thickness and high performance by leveraging vibrational resonance rather than relying on a thick rotary motor structure
2Productivity
If the pump uses a cylindrical shape with reciprocating motor, then it can achieve air suction and discharge, but the thickness of the pump cannot be reduced
Solution Approach 1:
The patent transitions from a cylindrical pump structure to a planar configuration where the vibration actuator operates in a different dimensional arrangement. The swinging body and diaphragm are arranged to move primarily in the lateral direction rather than axially, enabling the pump to maintain air suction and discharge functionality while achieving reduced thickness in the axial dimension
3Volume of moving object
If the pump uses a piezoelectric element, then the size can be reduced, but the vibration displacement amount is small and pressure and flow characteristics are limited
Solution Approach 1:
The patent combines the vibration actuator with a swinging body mechanism to amplify the displacement. The vibration actuator generates initial vibrations that are mechanically amplified through the swinging body's rotational motion, resulting in larger diaphragm displacement and improved pressure and flow characteristics while maintaining a compact size
Solution Approach 2:
The patent employs a dynamic swinging body that converts small linear vibrations into larger rotational and reciprocating motions. The swinging body's moment of inertia and rotational dynamics enable amplification of the vibration actuator's output, achieving both small overall size and high pressure-flow performance through dynamic motion transformation
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 pump achieves a thinner design with high discharge pressure and large flow rate, overcoming the limitations of conventional rotary and piezoelectric pumps by leveraging magnetic springs and electromagnetic drive for efficient operation.
Implementation Method 1
a vibration actuator which can be electromagnetically driven
Implementation Method 2
a movable body elastically held by magnetic attraction force of the magnet
Implementation Method 3
a movable wall which can be moved by rotational movement of the movable body, and a sealed chamber which is communicated with a discharge port for the fluid and a suction port for the fluid and whose volume can be changed by displacement of the movable wall
Data Source
AI summary
A pump contains a pump unit for suctioning and discharging fluid due to electromagnetic drive of a vibration actuator. The vibration actuator includes a fixed body containing one of a coil core portion and a magnet, a movable body containing another one of the coil core portion and the magnet, and a shaft portion for supporting the movable body so that the movable body can perform reciprocating rotation. The pump unit includes a movable wall, and a sealed chamber whose volume can be changed by displacement of the movable wall. The movable body has a pressing portion which can abut against the movable wall to press the movable wall when the movable body performs the reciprocating rotation.