Dust Collection Antechamber for Handheld Tool Filters
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Solution Overview
Problem
Dust-collecting devices for electric hand-held power tools face issues with frequent clogging of the dust filter, leading to reduced suction power and frequent emptying of the separating vessel due to the limited volume and location constraints.
Innovation Solution
A dust-collecting device with a freely suspended dust filter and an enlarged dust collection antechamber, which includes a first and second free space, allowing dust to accumulate before reaching the filter, thereby reducing clogging and extending the time between emptying cycles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the separating vessel is accommodated in the area of the dust extraction eye near the tool, then the device can be compact, but the volume of the separating vessel is limited and frequent emptying is necessary
Solution Approach 1:
The separating vessel is divided into two functional zones: a dust collection antechamber for accumulating separated dust and a filter area for the dust filter. This segmentation allows the vessel to accommodate a larger total volume while maintaining a compact form factor, as the antechamber can be filled with dust without immediately affecting filter performance.
Solution Approach 2:
The dust collection antechamber acts as an intermediary space between the dust separation process and the dust filter. It temporarily stores separated dust, preventing it from directly contacting the filter until the antechamber is full, thereby extending the operational time between emptying cycles.
2Volume of moving object
If the separating vessel is accommodated on the machine side in the area of the main body, then larger volume is possible, but the dust filter becomes clogged frequently and suction power decreases
Solution Approach 1:
The dust collection antechamber provides a preliminary storage space that accumulates dust before it can reach the dust filter. This preliminary action prevents the filter from becoming clogged by dust that has already been separated, maintaining suction power stability over extended periods.
Solution Approach 2:
The antechamber serves as a buffer zone that mediates between the dust separation process and the dust filter, preventing direct contact between accumulated dust and the filter surface, thereby maintaining reliable suction performance.
3Reliability
If the dust filter is arranged close to the dust separation point, then filtration is effective, but the filter gets clogged quickly and requires frequent maintenance
Solution Approach 1:
The dust collection antechamber is positioned between the dust separation point and the dust filter, acting as an intermediary that captures separated dust before it reaches the filter. This maintains filtration effectiveness while significantly reducing the frequency of maintenance operations.
Solution Approach 2:
The antechamber performs preliminary dust accumulation, preventing dust from immediately contacting the filter. This preliminary action extends the time between maintenance operations while the filter remains in position for effective filtration.
4Loss of time
If the dust collection antechamber volume is enlarged, then emptying frequency is reduced, but the device size increases
Solution Approach 1:
The separating vessel is segmented into the dust collection antechamber and the filter area, allowing the antechamber to be enlarged for extended operation while the overall device remains compact due to efficient spatial arrangement and the compact nature of the filter component.
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 effectively manages dust accumulation, maintaining suction power for a longer period and reducing the frequency of emptying the dust container by allowing dust to collect in the antechamber before reaching the filter, thus enhancing the operational efficiency of the device.
Implementation Method 1
The processing dust that occurs at the processing point is conveyed away from the processing point by means of a vacuum and an air stream and fed to a separating vessel
Implementation Method 2
There is a dust filter in the separator vessel to clean the air flow
Implementation Method 3
the separated dust will first collect in the dust collection antechamber and therefore not 'flood' the dust filter
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The device (1) has a dust filter (11) attached to an electric hand machine-tool (2) in a hanging manner when the device is in use position and during a horizontal work-tool operation. A dust collecting chamber (35) is provided in an air flow direction. The filter is arranged in a dust container (7). The filter comprises a clearance (29) from a base (17) of the container for creating a free-space (33). The dust container has a recess (21) in which a tubular discharging end area (22) of a suction passage (5) is extended.