Vacuum cleaning device
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Solution Overview
Problem
Existing dust extraction systems for hand-held power tools often fail to maintain high suction power over extended periods and lack effective filter cleaning mechanisms, leading to reduced efficiency and increased dust particle re-emission.
Innovation Solution
A dust extraction device with a mechanical interface for easy connection to hand-held power tools, featuring a filter-cleaning unit with a movable impact element that applies an impact-like force to the filter unit, combined with a blower unit for sustained suction power and an automated actuation system for convenient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a filter cleaning mechanism is added to the dust extraction device, then filter cleaning effectiveness is improved, but device complexity increases
Solution Approach 1:
The patent employs an impact element that generates mechanical vibrations and impact forces to clean the filter surface. This vibration-based cleaning mechanism effectively removes dust particles from the filter without requiring complex cleaning systems, thus improving filter cleaning effectiveness while maintaining relatively simple device structure.
Solution Approach 2:
The dust extraction device cleans its own filter using an integrated impact element that generates vibrations and impact forces. This self-service cleaning mechanism eliminates the need for separate manual cleaning operations or additional complex cleaning systems, thereby improving filter maintenance effectiveness while keeping the device complexity manageable.
2Productivity
If suction power is increased to maintain high extraction performance, then dust particle collection efficiency is improved, but energy consumption increases
Solution Approach 1:
The impact element performs preliminary cleaning action on the filter surface to prevent dust particle accumulation that would otherwise increase resistance to airflow. By maintaining filter permeability through periodic impact cleaning, the system sustains high dust particle collection efficiency without requiring continuously increased suction power, thus controlling energy consumption.
Solution Approach 2:
The dust extraction device maintains continuous effective operation by periodically activating the impact element to clean the filter. This ensures uninterrupted dust particle collection efficiency without needing to continuously increase suction power, as the filter remains clean and permeable throughout operation, thereby managing energy consumption effectively.
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 solution enables sustained high suction power and effective filter cleaning, ensuring efficient dust particle collection and reduced re-emission, while allowing for easy operation and maintenance.
Implementation Method 1
the impact element is designed to act upon the filter unit directly with an impact-like force
Implementation Method 2
The blower unit comprises at least one fan element which can be designed by way of example as a radial ventilator or as an axial ventilator
Implementation Method 3
The filter unit is provided for filtering the dust particles out of the air stream
Data Source
AI summary
A dust extraction device for a hand-held power tool includes a housing, a mechanical interface for releasably connecting the dust extraction device to the hand-held power tool, a dust-collecting chamber which is connected to a filter unit, and a filter-cleaning unit. The filter-cleaning unit has an impact element which is mounted moveably in and/or on the housing of the dust extraction device. The impact element is designed to act upon the filter unit directly with an impact-like force.