Expandable Housing Air Blower for Noise and Size Trade-off
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fluid control apparatuses, such as CPAP devices, face challenges in balancing quietness and portability due to the increase in size required for improved silencing, which compromises their portability when not in use.
Innovation Solution
An air-blowing device with a housing that can expand and contract to adjust internal volume, featuring a movable unit and partitioned spaces to enhance silencing while reducing size for improved portability, by increasing volume when in use and decreasing it when not in use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the volume of the silencer cavity is increased to improve quietness, then the noise reduction effect is enhanced, but the size of the fluid control apparatus increases, reducing portability
Solution Approach 1:
The housing is designed with expandable and contractible portions that can dynamically change volume. When the air blower is driven, the housing expands to increase the internal volume for better noise suppression. When the air blower is not driven, the housing contracts to reduce the overall size for improved portability. This dynamic volume adjustment resolves the contradiction between maintaining large silencer volume for quietness and reducing apparatus size for portability.
2Object-generated harmful factors
If the housing volume is increased to accommodate a larger silencer cavity, then the quietness is improved, but the portability when not in use deteriorates
Solution Approach 1:
The housing includes expandable portions that can be extended when needed and retracted when not in use. This allows the apparatus to maintain a large internal volume for noise suppression during operation while presenting a compact external form for portability when the air blower is not driven, effectively resolving the contradiction between quietness and portability.
Solution Approach 2:
The expandable portions can be nested within the main housing body when contracted, allowing the apparatus to maintain a compact form factor for portability while providing the option to expand the internal volume when noise suppression is required, creating a nested configuration that addresses both requirements.
Data Source
AI summary
An air-blowing device 10A includes an air blower 50 and a housing 20 that includes an intake hole 41a into which a fluid flows as a result of the air blower 50 being driven and an exhaust portion from which the fluid is discharged as a result of the air blower 50 being driven and that accommodates the air blower 50. The housing 20 is capable of expanding and contracting so as to change the internal volume of the housing 20.