Cleaner Noise Reduction Using Resonance Flow Paths to Preserve Suction
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Solution Overview
Problem
Existing noise reduction technologies for cleaners are ineffective in reducing flow noise (base noise) and are costly, difficult to standardize, and limited in applicability across various types of cleaners.
Innovation Solution
A noise reduction device using a guide flow path and intersecting flow paths with specific geometries to harness resonance sound-absorbing effects, without affecting cleaning performance or increasing production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the air outlet is blocked to reduce noise, then noise is reduced, but suction performance is reduced
Solution Approach 1:
The patent introduces a noise reduction member as an intermediary component between the air outlet and the external environment. This member includes flow path holes that allow air to pass through while providing sound insulation. The intermediary structure reduces noise by blocking direct sound propagation from the air outlet, yet maintains suction performance by allowing air flow through the flow path holes, thus resolving the contradiction between noise reduction and suction performance maintenance.
2Object-affected harmful factors
If internal and external noise absorption members are used, then noise is reduced, but production cost increases
Solution Approach 1:
The patent merges the noise reduction function with the existing air outlet structure by integrating the noise reduction member into the air outlet assembly. Instead of adding separate internal and external noise absorption members as in prior art, this single integrated component performs both noise reduction and air flow guidance functions, thereby reducing production cost while maintaining noise reduction effectiveness.
Solution Approach 2:
The noise reduction member is designed to serve multiple functions simultaneously: it provides sound insulation at the air outlet, guides air flow through its flow path holes, and can be applied to various types of cleaners. This multi-functionality eliminates the need for additional specialized noise absorption components, reducing production cost while achieving comprehensive noise reduction.
3Ease of operation
If an inclined grill is provided for air discharge, then air flow is guided, but flow noise cannot be reduced effectively
Solution Approach 1:
The patent applies local quality by creating a specific noise reduction structure at the air outlet region with flow path holes of particular sizes and distributions. This localized structure is designed to reduce flow noise (base noise) specifically at the air discharge point, while the inclined grill continues to perform its air guidance function. The combination addresses both air discharge guidance and flow noise reduction effectively.
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
Effectively reduces noise of various frequencies and prevents air discharge towards the user, while maintaining suction performance and being adaptable to different cleaner types.
Implementation Method 1
a first flow path having a first end communicating with the guide flow path and a second end that is open, the first flow path extending in a first direction; and a second flow path having a first end connected between the first end and the second end of the first flow path and a second end that is closed, the second flow path extending in a second direction intersecting the first direction
Implementation Method 2
harness resonance sound-absorbing effects
Data Source
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AI summary
A noise reduction device according to the present disclosure includes: a guide flow path guiding air discharged through an air outlet; a first flow path having a first end communicating with the guide flow path and a second end that is open, the first flow path extending in a first direction; and a second flow path having a first end connected between the first end and the second end of the first flow path and a second end that is closed, the second flow path extending in a second direction intersecting the first direction, wherein the guide flow path overlaps the second flow path in the first direction.