Air Purifier Vertical Flow Design to Reduce Circulation Noise
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Solution Overview
Problem
Conventional air purifiers generate significant noise due to indoor air circulation, adversely affecting user experience.
Innovation Solution
An air purifier design with a filtering cavity and driving cavity separated by an air hub featuring first and second air drawing frames, a centrifugal fan with opposing fan blades, and a streamlined air output arrangement to minimize air resistance and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a fan is used to drive indoor air circulation, then air purification function is improved, but noise level increases
Solution Approach 1:
The patent transitions from conventional horizontal air flow to vertical air flow by positioning the fan at the bottom of the housing and directing air upward through the filter assembly. This dimensional change in air flow path reduces turbulence and noise while maintaining purification effectiveness
Solution Approach 2:
The air outlet is designed with a curved, rounded configuration rather than sharp angles. This curvature smooths air flow transitions, reduces turbulence, and consequently lowers noise generation while maintaining air circulation functionality
2Productivity
If air flow rate is increased to improve purification efficiency, then productivity is improved, but air resistance increases
Solution Approach 1:
The vertical air flow configuration allows for a more direct path from the bottom air inlet through the filter to the top air outlet, reducing the number of sharp turns and minimizing air resistance while enabling higher flow rates for improved purification efficiency
Solution Approach 2:
Curved air flow passages and rounded corners throughout the housing design reduce flow separation and turbulence, lowering air resistance and enabling more efficient air movement at higher velocities
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 design increases air flow surface area, reduces air resistance, and minimizes noise, enhancing user experience by ensuring quieter operation.
Implementation Method 1
the driving fan being configured as a centrifugal fan
Data Source
AI summary
The present invention provides an air purifier including an outer case having a filtering cavity and a driving cavity spaced apart from each other, a filter received in the filtering cavity, a driving fan received in the driving cavity. The outer case has at least one air inlet and an air output. An air hub extends into the driving cavity. The air hub includes a first air drawing frame and a second air drawing frame coaxially formed with respect to the filter. An axial direction of the first air drawing frame is aligned with a longitudinal axis of the driving fan. The second air drawing frame extends peripherally, upwardly and radially from the first air drawing frame into the driving cavity.