Cleaner Noise Reduction Using Resonant Flow Path Structure
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Solution Overview
Problem
Existing noise reduction devices for cleaners are ineffective in reducing flow noise (base noise) and often increase production costs due to the use of internal and external noise absorption members, and are not easily applicable to various types of cleaners.
Innovation Solution
A noise reduction device that includes a guide flow path and intersecting flow paths to absorb noise through resonance, without affecting the suction performance and is designed to be adaptable to different cleaner types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If sound insulation structure is provided for the air outlet 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 sound waves from the air outlet without completely blocking the air flow, thus maintaining suction performance while reducing the harmful noise effect.
2Object-affected harmful factors
If internal and external noise absorption members are used to reduce noise, then noise is reduced, but production cost increases
Solution Approach 1:
The patent extracts and eliminates the complex internal and external noise absorption member structure from the design. Instead of using multiple separate noise absorption components, the invention integrates the noise reduction function into a single noise reduction member with flow path holes. This simplification reduces the number of parts, lowers production costs, and makes manufacturing easier while still achieving effective noise reduction.
Solution Approach 2:
The noise reduction member serves multiple functions simultaneously: it provides sound insulation, maintains air flow through its flow path holes, and can be applied to various types of cleaners. This multi-functional design eliminates the need for separate noise absorption members for different cleaner types, reducing overall production costs and simplifying manufacturing processes across product lines.
3Object-affected harmful factors
If noise absorption members are applied to various types of cleaners, then noise reduction is achieved, but standardization becomes difficult and production cost increases
Solution Approach 1:
The noise reduction member is designed with a universal structure that can be applied to various types of cleaners including canister-type, upright-type, handy-type, and stick-type cleaners. The member includes flow path holes that adapt to different air outlet configurations while maintaining the same basic noise reduction mechanism. This universal design enables standardization across product lines, allowing the same noise reduction component to be used in different cleaner types without requiring custom noise absorption members for each variant.
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
Significantly reduces noise across various frequency ranges without increasing the cleaner's size or affecting its performance, and can be easily mounted or removed as needed.
Implementation Method 1
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 incident waves entering the second flow path are reflected to have an opposite phase to waves exiting the second flow path, thereby reducing noise
Implementation Method 2
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
Data Source
AI summary
A noise reduction device according 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.