Backpack dust collector
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Solution Overview
Problem
Backpack dust collectors generate noise due to the operation of fans and motors, causing discomfort to users.
Innovation Solution
Incorporation of a noise-absorbing member and slit-shaped vents in the flow path between the motor chamber and exhaust port, along with a porous noise-absorbing member positioned between the vents and the exhaust port to attenuate noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a fan and motor are used to generate motive power for rotating the fan, then air suction and dust collection functionality is achieved, but noise is generated causing user discomfort
Solution Approach 1:
A noise-absorbing member is introduced as an intermediary element in the exhaust flow path between the motor chamber and exhaust port. This mediator absorbs noise generated by the motor and fan while allowing air flow to pass through, thus reducing noise transmission to the external environment without affecting dust collection performance
Solution Approach 2:
The noise-absorbing member utilizes porous material structure to achieve noise absorption. The porous structure allows air molecules to penetrate and interact with the material, converting acoustic energy into thermal energy through friction and viscosity, thereby reducing noise while maintaining air flow passage
2Object-generated harmful factors
If a noise-absorbing member is added to the flow path, then noise is reduced, but device complexity increases
Solution Approach 1:
The noise-absorbing member is designed to perform multiple functions: noise absorption, air flow guidance, and structural support. By integrating these functions into a single component, the overall device complexity is minimized while achieving noise reduction goals
Solution Approach 2:
The noise-absorbing member is positioned within the existing housing structure, nesting it within the flow path between the motor chamber and exhaust port. This nested arrangement utilizes the existing spatial configuration without requiring additional external structures, thereby limiting the increase in device complexity
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
Effectively reduces noise generation by absorbing sound energy as air passes through the vents and motor operation, enhancing user comfort.
Implementation Method 1
a noise-absorbing member disposed in at least part of a flow path between the vent and the exhaust port
Data Source
AI summary
A backpack dust collector includes a housing, a slit portion, and a noise-absorbing member. The housing includes a suction port, a dust collecting chamber, a motor chamber, and an exhaust port. The dust collecting chamber is connected to the suction port and configured to accommodate a dust collecting bag. The motor chamber is connected to the dust collecting chamber and accommodates a fan and a motor. Through the exhaust port, air from the motor chamber is discharged. The slit portion is disposed in a flow path between the motor chamber and the exhaust port and includes at least one slit-shaped vent through which air from the motor chamber passes. The noise-absorbing member is disposed in at least part of a flow path between the vent and the exhaust port.