Blower apparatus and vacuum cleaner
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Solution Overview
Problem
The existing blower apparatuses in vacuum cleaners suffer from unstable pressure and reduced air exhaust efficiency due to variations in the radial width of the channel defined between the motor case and the tubular air guide, which is affected by the precision of their assembly.
Innovation Solution
A blower apparatus design featuring a motor with a shaft, an impeller, and stationary vanes supported by a monolithic member comprising a cylindrical first and second ring, ensuring a uniform radial width of the channel and improved air exhaust efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a tubular air guide is assembled around a motor cover to define a channel, then the air guide can be installed and assembled, but the radial width of the channel varies at different circumferential positions due to assembly precision issues, resulting in unstable pressure and reduced air exhaust efficiency
Solution Approach 1:
The patent integrates the air guide and motor cover into a single monolithic member formed by injection molding. This merging of previously separate components eliminates the assembly interface that caused radial width variations, ensuring uniform channel dimensions and stable pressure throughout the circumferential direction while maintaining ease of manufacture through one-piece fabrication.
Solution Approach 2:
The monolithic member serves multiple functions simultaneously: it acts as both the motor cover and the air guide, and also provides the channel structure. This multi-functionality eliminates the need for separate assembly of air guide and motor cover, thereby ensuring consistent radial width without compromising manufacturing ease.
2Productivity
If the channel radial width varies due to assembly precision, then assembly is simpler, but air exhaust efficiency is reduced and pressure becomes unstable
Solution Approach 1:
By combining the air guide and motor cover into one monolithic member, the patent ensures uniform channel radial width that maintains stable pressure and optimizes air exhaust efficiency. The integrated structure eliminates dimensional variations that would otherwise compromise reliability while preserving manufacturing simplicity through injection molding.
3Ease of manufacture
If separate components (air guide and motor cover) are used, then manufacturing and assembly are easier, but the channel radial width is not uniform
Solution Approach 1:
The patent resolves the contradiction by merging the air guide and motor cover into a single monolithic component manufactured via injection molding. This approach maintains ease of manufacture through one-piece fabrication while ensuring consistent channel geometry and uniform radial width throughout, thereby achieving both manufacturing simplicity and geometric stability.
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 design provides a blower apparatus with a highly uniform radial width channel, enhancing air exhaust efficiency and stability of pressure, thereby improving the overall performance of the vacuum cleaner.
Implementation Method 1
an impeller coupled to the shaft on an upper end side of the shaft; an impeller housing arranged to house the impeller, and including an air inlet on an upper side
Implementation Method 2
a plurality of stationary vanes arranged on a lower side of the impeller housing; the stationary vanes, the first ring, and the second ring are defined by a single monolithic member, and together define at least a portion of a stationary vane support portion
Data Source
AI summary
A blower apparatus according to an exemplary embodiment of the present invention includes a motor including a shaft arranged to extend along a central axis extending in a vertical direction, and a bearing arranged to rotatably support the shaft; an impeller coupled to the shaft on an upper end side of the shaft; an impeller housing arranged to house the impeller, and including an air inlet on an upper side; a plurality of stationary vanes arranged on a lower side of the impeller housing; a cylindrical first ring arranged radially inside of the stationary vanes; and a cylindrical second ring arranged radially outside of the stationary vanes, and fixed to the impeller housing. The stationary vanes, the first ring, and the second ring are defined by a single monolithic member, and together define at least a portion of a stationary vane support portion.