Micro Water Pump Precise Flow Control via Photoelectric Feedback
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Solution Overview
Problem
Existing micro water pumps face challenges in achieving precise flow control, leading to instability and reduced service life due to limitations in regulating water flow under varying volumes and back pressures.
Innovation Solution
The micro water pump design incorporates a motor, eccentric wheel, photoelectric switch, and output circuit board to detect motor revolutions, allowing for precise control of water flow through a crank lever and one-way valves, with a direct connection between the eccentric wheel and motor, and additional features like a wear plate to minimize wear and tear, ensuring stable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional mechanical transmission members are used between motor and eccentric wheel, then the structure is more complex and easier to assemble, but the pump size increases and flow control precision decreases
Solution Approach 1:
The motor shaft is directly connected to the eccentric wheel, merging the motor assembly with the transmission component. This eliminates intermediate transmission members, reduces structural complexity, and maintains compact pump size while enabling precise flow control through direct motor-eccentric wheel coupling.
2Manufacturing precision
If flow regulation mechanisms are added to improve flow control, then flow precision improves, but the device complexity and size increase
Solution Approach 1:
The patent replaces complex mechanical flow regulation mechanisms with an electronically controlled motor system. The motor speed and rotation are precisely controlled through electrical signals, enabling accurate flow regulation without adding mechanical transmission members or flow control valves that would increase pump size.
Solution Approach 2:
Flow control is achieved by changing motor operating parameters (rotation speed, frequency) rather than adding mechanical flow restriction components. This allows precise flow regulation while maintaining a compact pump structure, as flow rate is controlled through electrical parameter adjustment rather than physical flow path modification.
3Reliability
If additional transmission members are used, then the connection between motor and eccentric wheel is more stable, but the pump size increases and service life decreases
Solution Approach 1:
By merging the motor shaft directly with the eccentric wheel, the patent eliminates intermediate transmission members that would introduce additional connection points and potential failure modes. This direct connection reduces the number of moving joints, decreases mechanical wear, and extends service life while maintaining connection stability through precise motor mounting and eccentric wheel attachment.
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 configuration enables precise control of water flow under different volumes and back pressures, extending the micro water pump's service life and maintaining stability, even in small-sized applications without additional transmission members.
Implementation Method 1
a photoelectric switch (10) and an output circuit board (20) are installed on the base casing (4)... The photoelectric shelter cooperates with the photoelectric switch for detecting a revolution of the motor
Implementation Method 2
The eccentric wheel (8) is formed with an oblique eccentric hole (83)... One end of the drive shaft (7) is obliquely inserted in the eccentric hole (83)... The eccentric wheel (8) brings the drive shaft (7) to turn circularly
Implementation Method 3
Another end of the eccentric wheel (8) is connected with the crank lever (6)... The crank lever (6) swings to bring the supports (61) to compress and swing repeatedly
Implementation Method 4
Under the action of a one-way valve, a pressure difference is generated between the water outlet/water inlet and the external atmosphere... The inlet hole (21) and the outlet hole (22) are provided with one-way valves which are opened in different directions
Implementation Method 5
The supports (61) bring the water capsule (5) to compress and swing repeatedly... A diaphragm inside the water pump is reciprocated through a mechanical device to compress or expand the air inside the pump
Data Source
AI summary
A micro water pump capable of controlling flow precisely includes an upper cover, a valve seat, a water capsule seat, a base casing, a water capsule, a crank lever, a drive shaft, an eccentric wheel, a motor, a photoelectric switch, and an output circuit board. The output circuit board is electrically connected with an external motor controller. Through the photoelectric switch to detect the revolution of the motor and to cooperate with the external motor controller, the revolution of the motor control can be controlled precisely so as to get a stable water flow under different volumes and back pressures.