Electric vacuum cleaner
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Solution Overview
Problem
Conventional electric vacuum cleaners face challenges in reducing noise while maintaining air intake balance without increasing in size, particularly due to the need for a large diameter centrifugal separating part to handle coarse dust and the resulting noise leakage from the blower chamber.
Innovation Solution
The electric vacuum cleaner incorporates a dual centrifugal separating system with smaller diameter second centrifugal separating parts positioned opposite to the electric blower, which communicate with the downstream side of the first centrifugal separating part, ensuring balanced air intake and noise reduction without size increase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the diameter of the circumferential wall portion of the centrifugally separating part is increased to centrifugally separate coarse dust, then dust separation capability is improved, but the overall size of the vacuum cleaner increases
Solution Approach 1:
The dust separating part is divided into multiple independent channels, each with its own centrifugal separation mechanism. This segmentation allows the system to handle coarse dust effectively through multiple smaller channels rather than requiring one large channel, thereby maintaining dust separation capability while reducing the overall footprint of the device.
2Device complexity
If only the circumferential wall portion is positioned around the electric blower chamber, then the structure is simplified, but noise leakage occurs and quietness is compromised
Solution Approach 1:
The dust separating part and the electric blower chamber are merged into an integrated structure where the dust separating part surrounds the electric blower chamber. This merging allows the dust separating part to serve dual functions: maintaining structural simplicity while simultaneously acting as a noise barrier to reduce noise leakage from the electric blower.
3Stability of the object's composition
If the circumferential wall portion is disposed coaxially with the electric blower, then air intake balance is secured, but the design flexibility is reduced
Solution Approach 1:
The dust separating part employs an asymmetric multi-channel structure with channels arranged at different positions and orientations around the electric blower chamber. This asymmetric design maintains air intake balance by distributing airflow evenly across multiple channels while providing greater design flexibility compared to a simple coaxial configuration.
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 configuration effectively improves quietness by balancing air intake and reducing noise leakage, while maintaining the necessary size and efficiency for dust separation.
Implementation Method 1
sucking dust into the dust collecting part from the air passage body by a negative pressure generated by driving of the electric blower
Implementation Method 2
a centrifugally separating part that centrifugally separates dust by turning air containing dust
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
Provided is an electric vacuum cleaner that can be improved in quietness without increasing in size while securing air intake balance. The electric vacuum cleaner includes an electric blower (25). The electric vacuum cleaner includes a separating part (39) that separates dust sucked by the electric blower (25). The separating part (39) includes a first centrifugally separating part (32) that centrifugally separates dust sucked by the electric blower (25). The separating part (39) includes a plurality of second centrifugally separating parts (36) that centrifugally separates dust smaller than dust to be separated by the first centrifugally separating part (32). The second centrifugally separating parts (36) communicate with the downstream side of the first centrifugally separating part (32), and are disposed at positions opposite to each other with respect to the electric blower (25).