Surface Cleaning Apparatus Linear Airflow Path to Reduce Backpressure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing cyclonic hand vacuum cleaners face challenges in maximizing airflow rate without increasing the size or weight of the suction motor, often resulting in reduced efficiency due to backpressure in the airflow path.
Innovation Solution
The design features a cyclone unit with a cyclone axis parallel to the suction motor axis, allowing air to flow linearly from the cyclone outlet to the suction motor inlet, with pre- and post-motor filters positioned to maintain a linear airflow path, reducing backpressure and enabling increased airflow without motor size or weight increments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the suction motor size is increased to maximize airflow rate, then the airflow rate is improved, but the weight and size of the device increases
Solution Approach 1:
The patent changes the geometric parameters of the airflow path, specifically making it linear and reducing the number of bends and transitions. This optimization of flow path geometry reduces resistance and allows the same motor size to produce higher airflow rates, or enables smaller motors to achieve the same performance
2Productivity
If the suction motor size is increased to maximize airflow rate, then the airflow rate is improved, but the overall device size increases
Solution Approach 1:
The patent optimizes the dimensional parameters of the airflow path to be linear and compact, reducing the space required for air to travel from the cyclone to the motor. This allows for smaller device volume while maintaining or improving airflow rate
3Adaptability or versatility
If conventional airflow path configuration is used with multiple bends and transitions, then component layout flexibility is improved, but backpressure increases reducing efficiency
Solution Approach 1:
The patent changes the geometric parameters of the airflow path from conventional bent configurations to a linear arrangement, minimizing the number of bends and transitions. This reduces turbulence and pressure losses, thereby reducing backpressure and improving overall system efficiency
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
This configuration enhances airflow rate through the hand vacuum cleaner, allowing for either increased airflow with the same motor size or using a smaller motor, while maintaining efficiency and reducing the overall weight and size of the device.
Implementation Method 1
a cyclonic separator for separating dirt and dust from an airflow
Implementation Method 2
The cyclone separator is located in an airflow path leading from the air inlet to the air outlet
Data Source
AI summary
A surface cleaning apparatus has a surface cleaning head, a support pivotally mounted to the surface cleaning head and a surface cleaning unit vertically removably mounted to an upper end of the support. The support consists of an upflow duct. The surface cleaning unit comprises a cyclone chamber having an external dirt collection chamber, a pre-motor filter, a suction motor and a flexible hose.