Multi-Stage Blower with High-Speed Motor for Dust Displacement
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Solution Overview
Problem
Existing blowers, such as air dusters, face challenges in efficiently blowing off grit and dust due to limitations in air discharge force and efficiency, particularly in compact designs.
Innovation Solution
A blower design featuring a motor with a rotational speed range of 50,000 rpm to 120,000 rpm, multiple coaxially arranged fans, and a housing with specific inlet and discharge openings, along with a battery mounting part for portable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the motor rotational speed is increased to improve blowing force, then the blowing force increases, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent applies parameter changes by precisely controlling the motor rotational speed within 50,000 rpm to 120,000 rpm and fan diameter within 30 mm to 70 mm to achieve the desired blowing force of 1 N to 3 N without excessive complexity. This optimization of operational parameters allows the system to reach target performance through controlled variable adjustment rather than complex structural modifications.
2Volume of moving object
If the fan diameter is reduced to achieve compact size, then the device size decreases, but the blowing force decreases
Solution Approach 1:
The patent applies preliminary anti-action by compensating for the reduced blowing force from smaller fans through pre-designed multi-stage configuration and optimized motor speed selection. The system anticipates the force loss from compact fans and counteracts it through the combined effect of multiple stages operating in sequence, achieving both compactness and sufficient blowing force.
Solution Approach 2:
The patent transitions from a single-dimension solution (larger fan diameter) to a multi-dimensional approach by arranging multiple fans in series along the rotational axis. This vertical stacking of compact fans achieves the required blowing force through cumulative effect in the axial direction while maintaining small radial dimensions for portability.
3Force
If multiple fans are arranged in series to increase blowing force, then the blowing force increases, but the device length increases
Solution Approach 1:
The patent applies the nesting principle by coaxially arranging multiple fans along the same rotational axis, with each fan nested within the flow path of the previous stage. This concentric configuration allows multiple functional stages to occupy minimal axial space, achieving high blowing force without proportionally increasing device length.
4Volume of moving object
If the discharge opening area is reduced to achieve compact design, then the device size decreases, but the air discharge efficiency decreases
Solution Approach 1:
The patent optimizes the discharge opening area parameter within the specific range of 2.5 mm to 10 mm diameter to achieve the balance between compact size and air discharge efficiency. This precise parameter control ensures sufficient airflow output for the intended application while maintaining portable dimensions, avoiding both excessive size and inadequate performance.
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 blower achieves a sufficient blowing force of 1 N to 3 N, efficiently displacing grit and dust, while maintaining a compact size due to optimized fan and nozzle diameters and high motor speed.
Implementation Method 1
a motor, a plurality of fans, a housing and a battery mounting part. The fans are coaxially arranged in multiple stages and configured to compress and blow air by rotating around a specified rotational axis when the motor is driven
Implementation Method 2
The fans are coaxially arranged in multiple stages and configured to compress and blow air by rotating around a specified rotational axis
Data Source
AI summary
A blower includes a motor, a plurality of fans coaxially arranged in multiple stages, a housing having an inlet opening and a discharge opening, and a battery mounting part to which a battery is removably mountable. A rotational speed of the motor is within a range of 50,000 rpm to 120,000 rpm. A diameter of each of the fans is within a range of 30 mm to 70 mm. An area of the discharge opening is within a range of not less than an area of a circle having a diameter of 2.5 mm and not more than an area of a circle having a diameter of 10 mm. A blowing force of air discharged through the discharge opening is within a range of 1 N to 3 N.