Synthetic Jet Vacuum Unit for Low-Noise Dust Dislodging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vacuum cleaning devices are ineffective in dislodging dust from surfaces, particularly carpets, and require an additional suction system to collect dust particles, which increases operational noise and power consumption.
Innovation Solution
A unit with a housing and a movable surface that generates an oscillating airflow, creating a synthetic jet with asymmetry between suction and blowing phases, allowing dust particles to become airborne and be transported without the need for a conventional suction system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional suction system with motor and fan is used to generate suction force for removing dust, then dust particles can be effectively collected, but operational noise and power consumption increase
Solution Approach 1:
The invention extracts and eliminates the conventional suction system (motor and fan) from the vacuum cleaning device. Instead of using a motor-driven fan to generate suction, the patent employs an acoustic wave generator that produces standing waves to agitate dust particles and a directed airflow system to transport them, thereby removing the primary source of operational noise and high power consumption
Solution Approach 2:
The invention replaces the mechanical suction system with an acoustic field-based system. The acoustic wave generator creates standing waves that mechanically agitate dust particles without requiring a motor, and the directed airflow is generated through acoustic radiation pressure rather than a fan, substituting mechanical components with acoustic field mechanisms
2Object-affected harmful factors
If only vibration is applied to dislodge dust from carpet at resonant frequency, then dust particles can be loosened from the surface, but dust cannot be effectively freed from inside the carpet and made airborne
Solution Approach 1:
The invention merges two functions into a single integrated system: the acoustic wave generator that creates standing waves to agitate dust particles, and the directed airflow system that makes particles airborne and transports them. This combination ensures that dust is not only loosened from the carpet surface but also effectively freed from inside the carpet fibers and removed, achieving complete dust liberation without requiring a separate suction system
Solution Approach 2:
The invention employs periodic acoustic waves at resonant frequency to continuously agitate dust particles from the carpet. The standing waves create periodic compression and rarefaction cycles that repeatedly impact the carpet fibers, progressively loosening and freeing dust particles from deep within the carpet structure, making them airborne over time
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 synthetic jet effectively dislodges dust particles from surfaces and transports them efficiently, reducing the need for a separate suction system, thereby lowering power requirements and operational noise.
Implementation Method 1
means for actuating the movable surface, which are adapted to realise an oscillating movement of the surface that causes air to alternately be drawn into the housing through the opening from various directions at the opening, and expelled from the housing through the opening in the form of a directed jet
Implementation Method 2
A synthetic jet is formed when a directed jet of air is generated during an outflow phase of a cycle of drawing in and expelling air
Implementation Method 3
a technique which involves the use of a kind of air pump, wherein air waves are generated for vibrating the surface, which can help in releasing dust particles from the surface
Implementation Method 4
the frequency of the oscillating airflow is preferably chosen such as to be at the resonant frequency of the carpet to be cleaned
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A vacuum cleaning device comprises a unit (1) in which an oscillating airflow is generated which substantially zero net flow and an asymmetry between the suction and the blowing phases, such that in the blowing phase a jet is generated. A generator (31) which is needed for generating the oscillating airflow comprises a movable surface (30) which is integrated in a wall (12) of a housing (10) having an internal space (11) and at least one opening (13) for allowing air to flow to and from the internal space (11). The jet can be generates when the so-called Strouhal number, being the frequency of the movement of the movable surface (30) multiplied by a characteristic dimension of the opening (13) and divided by the velocity of the air in the opening (13), is not higher than a predetermined maximum.