Shading Motor Load Reduction for Nebulizer Atomization
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Solution Overview
Problem
A shading motor with insufficient torque becomes unable to rotate a rotor beyond a predetermined speed when used in a nebulizer, leading to inadequate atomization of chemical solutions.
Innovation Solution
A nebulizer configuration that includes a compressor with a shading motor, a nozzle, an atomization unit with a baffle, and a flow path, along with a load reduction mechanism such as an opening/closing unit or a buffer tank, to reduce the load on the shading motor until it reaches the predetermined rotation speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a small-sized shading motor is used to reduce device size, then the nebulizer becomes more compact, but the torque becomes insufficient and the rotor cannot exceed a predetermined rotation speed
Solution Approach 1:
The system performs preliminary action by reducing the load on the motor during the startup phase before the rotor reaches predetermined rotation speed. The load reduction mechanism actively manages pressure buildup in the discharge space during this critical period, allowing the small motor to overcome initial torque limitations and achieve sufficient rotation speed for proper atomization.
2Reliability
If the compressor pressure increases to improve atomization, then the atomization performance improves, but the load on the shading motor increases beyond its torque capacity
Solution Approach 1:
The system applies dynamics by making the load on the motor time-dependent rather than constant. The load reduction mechanism dynamically adjusts the pressure conditions in the discharge space based on the rotor's rotation speed. During startup, the mechanism suppresses pressure increase to reduce load, while after the rotor reaches predetermined speed, normal pressure buildup occurs to ensure proper atomization performance.
3Force
If the rotor rotation speed is limited to prevent motor overload, then the motor operates within torque limits, but the chemical solution cannot be sufficiently atomized
Solution Approach 1:
The load reduction mechanism performs preliminary action during motor startup by actively suppressing pressure increase in the discharge space before the rotor reaches predetermined rotation speed. This preliminary load reduction allows the small motor to accelerate properly without being overloaded, enabling it to achieve the rotation speeds necessary for sufficient atomization of the chemical solution.
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
Enables the rotor to rotate beyond the predetermined speed even with a small-sized shading motor, ensuring sufficient atomization of chemical solutions.
Implementation Method 1
a compressor including a shading motor as a power source and having a discharge port that discharges compressed air generated by driving the shading motor
Implementation Method 2
a nozzle that injects the compressed air generated by the compressor
Implementation Method 3
an atomization unit including a baffle disposed to face the nozzle, and generates an aerosol by adding a chemical solution to the compressed air injected from the nozzle and spraying the compressed air added with the chemical solution onto the baffle
Data Source
AI summary
A compressor includes a shading motor as a power source, and is provided with a discharge port that discharges compressed air generated by driving the shading motor. The shading motor includes a stator that is made of a soft magnetic material and has an apparent volume of 78000 mm3 or less. A load reduction mechanism reduces a load applied to the shading motor by suppressing a pressure increase in the flow path over a period from a first time point at which the shading motor starts driving to a second time point at which the rotation speed of a rotor reaches a predetermined rotation speed.