Vacuum Cleaner Guide Fan Assembly for Reduced Air Flow Loss
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fan motor assemblies in vacuum cleaners experience flow loss due to deformities in the guide fan, such as burrs from the injection process, leading to reduced motor performance and efficiency.
Innovation Solution
A fan motor assembly with a guide fan featuring a first guide unit with a circular panel and diffuser, and a second guide unit with a ring-shaped sealing member and return vane, which includes ribs to prevent air flow loss by making line contact with the case, enhancing air pressure and guiding it towards the motor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a guide fan is formed by an injection process, then the manufacturing ease is improved, but the manufacturing precision deteriorates due to deformities such as burrs generated by injection pressure
Solution Approach 1:
The patent extracts and removes the harmful burrs generated during injection molding from the guide fan surface, eliminating the defect that causes flow loss and motor performance variation
Solution Approach 2:
The patent changes the physical state and properties of the guide fan surface by applying a coating layer that fills and smooths over the injection-induced deformities, transforming the rough surface into a smooth one that reduces flow loss
2Ease of manufacture
If the guide fan has deformities from injection process, then the manufacturing cost is reduced, but the motor efficiency deteriorates due to increased flow loss
Solution Approach 1:
The patent applies a coating treatment that changes the surface parameters of the guide fan, filling injection deformities and creating a smooth surface that minimizes flow loss and energy waste while maintaining the economical injection molding process
3Ease of manufacture
If the guide fan surface is rough due to injection burrs, then the manufacturing simplicity is improved, but the motor performance stability deteriorates due to variation in performance
Solution Approach 1:
The patent transforms the guide fan surface parameters through coating application, converting the rough, variable surface from injection molding into a uniform, smooth surface that ensures consistent motor performance and eliminates performance variation
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 solution minimizes air flow loss, resulting in improved motor efficiency and vacuum cleaner performance by maintaining higher vacuum levels and efficiency compared to traditional designs.
Implementation Method 1
a diffuser provided at the panel member
Implementation Method 2
rotating a motor having a rotor configured to rotate with respect to a stator through an electromagnetic force
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A fan motor assembly capable of improving efficiency of a motor by minimizing flow loss, and a vacuum cleaner having the same includes a case, a motor installed inside the case to form a suction force, an impeller rotatably installed on a shaft of the motor, and a guide fan configured to guide air that is suctioned by the motor, wherein the guide fan includes a first guide unit configured to increase pressure of the suctioned air and a second guide unit provided at an upper side of the first guide unit to be in contact with the case.