Flexible Vacuum Cleaner Air Duct for Motor Vibration Isolation
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Solution Overview
Problem
Conventional vacuum cleaners experience significant vibration and noise due to rigid air ducts connecting the dust-box air outlet to the motor suction port, leading to resonance and discomfort during operation.
Innovation Solution
A vacuum cleaner with a retractable flexible air duct that is sealingly connected between the dust-box air outlet and motor suction port, allowing for both axial and torsional deformation, reducing vibration transmission and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid air duct is used to connect the dust-box air outlet to the motor suction port, then the structural stability and manufacturing simplicity are improved, but the vibration transmission and noise increase significantly
Solution Approach 1:
The patent replaces the rigid air duct with a flexible air duct made of elastic material. This flexible duct can deform under negative pressure without transmitting vibration effectively, thus reducing noise while maintaining structural integrity. The flexible nature of the duct allows it to absorb vibrations from the high-speed rotating motor without transferring them to the dust box and housing.
Solution Approach 2:
The patent changes the physical parameter of the air duct from rigid to flexible state. By selecting appropriate elastic materials and designing the duct with specific thickness and dimensional parameters, the duct can withstand negative pressure while maintaining flexibility. This parameter change enables the duct to isolate vibrations while ensuring structural stability during operation.
2Manufacturing precision
If a rigid air duct is used, then the manufacturing precision and assembly simplicity are improved, but the resonance vibration and user comfort deteriorate
Solution Approach 1:
The flexible air duct is designed with flanges at both ends that can be sealedly connected to the dust box and motor. The flexible body between the flanges allows for relative movement and deformation, providing user comfort by reducing vibrations and noise, while the flange connections maintain assembly precision and sealing effectiveness.
3Object-generated harmful factors
If a flexible air duct is used, then the vibration isolation and noise reduction are improved, but the structural complexity and material requirements increase
Solution Approach 1:
The patent controls the thickness and dimensional parameters of the flexible air duct to ensure it can withstand negative pressure without excessive deformation. By optimizing these parameters, the duct achieves vibration isolation functionality while maintaining structural simplicity and avoiding unnecessary complexity in the overall structure.
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 flexible air duct significantly reduces vibration noise and improves user comfort by minimizing resonance and vibration amplitude, while preventing destructive deformation from negative-pressure airflow.
Implementation Method 1
the motor rotates at a high speed and produces vibration, and the rigid pipe used for connecting the dust-box air outlet to the motor suction port will also vibrate because of vacuum suction and airflow, which make the dust box vibrate after the vibration is transferred to the dust box
Implementation Method 2
in the process of vibration transmission, the amount of vibration transferred to the dust box becomes greater because of resonance, which makes the entire vacuum cleaner noisy
Implementation Method 3
the negative-pressure airflow in the air duct drives the air duct wall to vibrate at a high frequency, thus producing noise
Data Source
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AI summary
The present invention discloses a vacuum cleaner having motor suspension immobile structure, with a retractable flexible air duct being sealingly connected between its dust-box air outlet and motor suction port. This vacuum cleaner can effectively reduce the influence of motor vibration on the dust box, reduce the vibration noise of the vacuum cleaner in operation, and weaken the numb feeling of hand when a hand is in touch with the outer surface of the vacuum cleaner, enhancing the user experience.