Cleaner Noise Control Module for Frequency-Selective Acoustic Feedback
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Solution Overview
Problem
Users often misunderstand the operation state of cleaners due to noise levels below 2000 Hz or above 8000 Hz, perceiving poor cleaning performance despite effective operation, and are discomforted by low-frequency machine sounds, with noise quality varying by ear position and being affected by the cleaner's exhaust.
Innovation Solution
A noise control module is integrated into the cleaner, comprising a speaker that increases noise levels in the 2000 Hz to 8000 Hz frequency range and a detection unit to reduce low-frequency noise, with the speaker output adjusted based on detected noise signals, and the noise and sound outlets are positioned to combine effectively, reducing noise variation by ear position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If noise reduction measures are implemented in the cleaner, then the overall noise level decreases, but the user perceives poor cleaning performance due to reduced high-frequency noise (2000-8000 Hz) that indicates effective operation
Solution Approach 1:
The patent applies local quality by selectively managing different frequency components of noise. The cleaner generates high-frequency noise (2000-8000 Hz) through the impeller rotation to indicate effective cleaning operation, while low-frequency noise (below 2000 Hz) from the motor is reduced through sound insulation structures. This frequency-specific approach allows the cleaner to maintain operational effectiveness indicators while reducing harmful low-frequency noise.
2Object-generated harmful factors
If sound insulation structures are added to reduce noise, then low-frequency noise decreases, but the exhaust outlet functionality is compromised due to limited space for both noise control and air exhaust
Solution Approach 1:
The patent segments the exhaust outlet structure into multiple functional zones. The exhaust outlet includes a sound insulation portion with sound absorbing material for noise reduction, while maintaining an open exhaust通道 for air flow. This segmentation allows simultaneous achievement of noise insulation and effective air exhaust functionality within the same component.
Solution Approach 2:
The patent introduces sound absorbing material as an intermediary substance within the exhaust outlet structure. This material serves as a mediator that reduces low-frequency noise while allowing air to pass through, resolving the conflict between noise insulation and exhaust functionality without requiring separate complex structures.
3Loss of information
If the speaker output is increased to enhance high-frequency noise for user perception, then cleaning performance indication improves, but the speaker performance is affected by the exhaust air flow
Solution Approach 1:
The patent introduces a sound outlet as an intermediary structure that is separate from the exhaust outlet. The sound outlet provides a dedicated pathway for speaker sound to escape without being directly affected by the high-velocity exhaust air flow. This separation allows the speaker to reliably generate high-frequency noise for cleaning performance indication while the exhaust air flows independently through the exhaust outlet.
4Object-generated harmful factors
If noise control measures are implemented, then overall noise reduction is achieved, but the noise quality varies depending on the user's ear position
Solution Approach 1:
The patent makes the exhaust outlet structure serve multiple functions simultaneously: it acts as both an air exhaust pathway and a sound radiation structure. The sound outlet portion is specifically designed to radiate high-frequency noise uniformly in multiple directions, ensuring that users perceive consistent cleaning performance feedback regardless of their position relative to the cleaner.
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 solution addresses user misunderstandings of cleaning performance, reduces discomfort from low-frequency sounds, and stabilizes noise perception by enhancing high-frequency noise levels and reducing low-frequency noise, ensuring effective noise control and improved user experience.
Implementation Method 1
a noise control module including a speaker and configured to control an output of the speaker to increase a level of the noise of at least one frequency range of 2000 Hz or more and 8000 Hz or less
Implementation Method 2
The noise control module may further include a detection unit detecting noise or vibration
Implementation Method 3
The noise control module may be configured to shift in phase a signal of at least one frequency range of 1500 Hz or less of signals detected by the detection unit and cause the speaker to output the phase shifted signal
Data Source
AI summary
The cleaner according to the present disclosure includes a main body forming an airflow path through which air is sucked and exhausted; a dust separation unit disposed in the airflow path and configured to separate dust from the air; a fan module disposed in the airflow path and configured to move the air in the airflow path; and a noise control module including a speaker, and configured to control the output of the speaker to increase a level of the noise of at least one range of the frequency range of 2000 Hz or more and 8000 Hz or less.