Hand Vacuum Inlet Layout for Low-Back-Pressure Cyclone Flow
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Solution Overview
Problem
Existing cyclonic hand vacuum cleaners often have airflow paths that include 90° bends, leading to back-pressure issues and limiting the efficiency of dirt separation, which can require larger motors and lower airflow speeds.
Innovation Solution
Designing a cyclonic hand vacuum cleaner with a nozzle positioned at the lower portion and an airflow path that extends vertically from the nozzle to the cyclone chamber, minimizing bends and allowing for a tangential flow into the cyclone, thereby reducing back-pressure and enabling the use of smaller motors or higher airflow speeds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the airflow path includes 90° bends, then the vacuum cleaner can be compact in design, but back-pressure increases and airflow speed decreases
Solution Approach 1:
The airflow path uses curved transitions instead of sharp 90° bends to reduce turbulence and back-pressure. The curved design maintains compact dimensions while improving airflow characteristics and reducing energy loss.
2Volume of moving object
If the airflow path includes multiple bends, then the vacuum cleaner structure can be compact, but dirt separation efficiency decreases
Solution Approach 1:
Curved airflow paths are designed to maintain laminar flow into the cyclone separator, improving dirt separation efficiency while keeping the overall device compact.
3Speed
If larger motors are used to compensate for back-pressure, then airflow speed can be maintained, but the vacuum cleaner becomes heavier and less portable
Solution Approach 1:
The design converts the potential harm of back-pressure into a benefit by optimizing the airflow path geometry. The curved transitions reduce turbulence and energy loss, allowing smaller motors to achieve the same airflow speed, thereby reducing weight while maintaining 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
This design enhances the efficiency of dirt separation, allowing for a more compact and powerful hand vacuum cleaner with improved airflow speed and reduced motor size, while maintaining a wide cleaning path.
Implementation Method 1
a cyclonic separator for separating dirt and dust from an airflow. The cyclone separator is located in an airflow path leading from the air inlet to the air outlet. The cyclone separator is arranged in a generally upright orientation (i.e., the air rotates about a generally vertical axis in use).
Implementation Method 2
the air rotates about a generally vertical axis in use
Data Source
AI summary
A vacuum cleaner has a front, an upper portion and a lower portion. The vacuum cleaner comprises an air flow passage extending from a nozzle having a dirty air inlet to a clean air outlet. A cyclone unit comprises at least one cyclone having a cyclone air inlet positioned in the air flow passage. A suction motor is positioned in the air flow passage. In one aspect, the vacuum cleaner is a hand vacuum cleaner and the nozzle is positioned at a lower portion of the hand vacuum cleaner and preferably below the vacuum cleaner. In another aspect, the vacuum cleaner is a hand vacuum cleaner and the nozzle includes a lower open sided passage. In accordance with another aspect, the vacuum cleaner has an air treatment member that is positioned at least partially above the air inlet.