Fan, diffuser, and vacuum cleaner having the same
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Solution Overview
Problem
Existing vacuum cleaner fans have inefficiencies in airflow velocity distribution and flow rate due to suboptimal diffuser designs, leading to higher power consumption and reduced performance.
Innovation Solution
A diffuser with an annular bottom plate and evenly spaced guide vanes that extend obliquely, deflecting between 30 to 70 degrees tangentially and 35 to 120 degrees circumferentially, enhances airflow guidance and pressure, coupled with a motor and impeller for improved efficiency and reduced power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional diffuser design is used, then the structure is simple, but the airflow velocity distribution and flow rate are insufficient, leading to higher power consumption
Solution Approach 1:
The patent applies parameter changes by optimizing the deflection angles of guide vanes (30-70 degrees tangential, 35-120 degrees circumferential) and the geometric parameters of the diffuser passage. These parameter optimizations improve airflow velocity distribution and flow rate while reducing power consumption, resolving the contradiction between productivity and energy use.
Solution Approach 2:
The patent implements local quality by designing guide vanes with different deflection angles at different locations (inner end vs outer end). The inner end has a deflection angle of 30-70 degrees while the outer end has 35-120 degrees, creating localized flow control that optimizes overall airflow characteristics and resolves the contradiction between flow rate and power consumption.
2Productivity
If a conventional diffuser design is used, then the manufacturing is simple, but the fan efficiency is low
Solution Approach 1:
The patent optimizes fan efficiency through parameter changes in the diffuser structure, specifically the guide vane deflection angles and passage geometry. These parameter optimizations increase fan efficiency by improving airflow guidance while maintaining a relatively simple overall structure that does not significantly increase manufacturing complexity.
3Stress or pressure
If the guide vanes are deflected at optimal angles, then the airflow pressure and efficiency increase, but the manufacturing precision requirements increase
Solution Approach 1:
The patent specifies optimal deflection angle ranges (30-70 degrees tangential, 35-120 degrees circumferential) that balance airflow pressure improvement with manufacturing feasibility. These parameter ranges are designed to achieve high airflow pressure while remaining within practical manufacturing tolerances, resolving the contradiction between pressure and manufacturing precision.
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 increases airflow pressure and efficiency by 10% compared to conventional fans, reducing power consumption and enhancing the overall performance of vacuum cleaners.
Implementation Method 1
Each guide vane is deflected an angle of 30 to 70 degrees with respect to a tangential direction of the bottom plate at an inner end of the guide vane. The outer end of each guide vane is deflected an angle of 35 to 120 degrees along a circumferential direction with respect to the inner end of the guide vane.
Data Source
AI summary
A fan of a vacuum cleaner includes a motor, an impeller, and a diffuser. The diffuser includes a bottom plate and guide vanes disposed on the bottom plate. The guide vanes are evenly spaced and arranged along a circumferential direction of the bottom plate. Each guide vane extends obliquely from an inner edge to an outer edge of the bottom plate. An outer end of each guide vane extends beyond the outer edge of the bottom plate. Each guide vane is deflected an angle of 30 to 70 degrees with respect to a tangential direction of the bottom plate at the inner end of the guide vane. The outer end of each guide vane is deflected an angle of 35 to 120 degrees along a circumferential direction with respect to the inner end of the guide vane.