Vacuum Cleaner Dust Collector Filling Indicator for Stub Blockage Detection
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Solution Overview
Problem
Existing methods for determining the degree of filling in vacuum cleaner dust collectors fail to detect accumulation of larger particles, which can lead to material getting stuck in the connecting stub and subsequent rapid accumulation, especially when the bag is filled with items like popcorn, as these do not cause noticeable pressure drops, leading to inadequate warning systems.
Innovation Solution
A method involving differential pressure measurements between two positions within the connecting stub, with one position near the end where the dust collector is passed into and the other at a suitable distance, utilizing axial and transverse pipes to enhance sensitivity, allowing detection of settled material and preventing accumulation by measuring pressure changes indicative of filling levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If differential pressure measurement is performed only between the compartment outside the bag and inside the bag, then the device complexity is reduced, but the measurement precision is insufficient to detect material accumulation in the connecting stub
Solution Approach 1:
The single differential pressure measurement system is segmented into two separate measurement systems: one measuring pressure difference between the compartment and bag interior, and another measuring pressure difference within the connecting stub. This segmentation allows each measurement system to focus on specific detection tasks, improving overall measurement precision without requiring an excessive number of sensors by strategically positioning measurement points.
Solution Approach 2:
The connecting stub serves as an intermediary zone where material accumulation is detected through differential pressure measurement. By measuring pressure difference across this intermediate region (between its end near the dust collector and a point further inside), the system detects accumulation before it blocks the main airflow path, providing early warning while maintaining simple device architecture.
2Quantity of substance
If the dust collector is filled with larger objects like popcorn, then the quantity of substance increases, but the measurement precision of pressure drop detection decreases because these objects do not establish noticeable pressure drop
Solution Approach 1:
The system performs preliminary detection of material accumulation in the connecting stub before the dust collector bag becomes fully clogged. By measuring pressure difference within the connecting stub region, the system detects the presence of accumulated material (such as popcorn or other large objects) early in the filling process, providing advance warning before the accumulation reaches levels that would significantly impact overall pressure drop measurements.
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 indicates when the dust collector needs replacement by measuring significant pressure changes, ensuring timely alerts and preventing material jamming in the connecting stub, regardless of the material composition, through precise differential pressure readings.
Implementation Method 1
a differential pressure between an area inside the compartment, but outside the bag, and an area inside the bag is measured
Implementation Method 2
a further differential pressure is measured between a first area and, a second area in the connecting stub
Data Source
AI summary
In order to measure the degree of filling of a dust collector (5), where the dust (15, 16) collected in the dust collector may be of a very varied composition ranging from very fine dust (15) to rather large particles (16), a high pressure difference and a low pressure difference are measured by two differential pressure meters (11, 12), where the one differential pressure meter (12) measures the pressure difference between the compartment (4) of the dust collector, in which the dust collector (5) is arranged, and a measurement position at the connecting stub (6) of the vacuum cleaner, as is known, while the other differential pressure meter (11) measures between two measurement positions inside the connecting stub (6). Hereby, the method and the filling indicator according to the invention will ensure that larger particles do not settle inside the connecting stub (6) since these are detected beforehand by the differential pressure meter (11) which records lower pressure differences that the differential pressure meter (12).