Cyclone Chamber Dust Sensing for Full Vacuum Dustbins
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Solution Overview
Problem
Vacuum cleaners with cyclonic dust separation chambers often fail to notify users when the dustbin is full, leading to clogged filters and maintenance issues due to dust accumulation, as existing optical dust indicators are prone to dust contamination and false readings.
Innovation Solution
A dust detection system using an electromagnetic signal emitter and receiver positioned at the bottom of the cyclonic dust separation chamber, which is kept clean by the cyclonic airflow, detects dust accumulation to indicate a full dustbin, with a protruding element enhancing airflow and a control system for reliable signal processing to avoid false indications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If optical dust indicators are arranged in the optical path within the dust separation chamber, then dust detection capability is improved, but the indicators become contaminated by dust and produce false readings
Solution Approach 1:
The patent introduces an intermediary location (the cyclone chamber bottom) that serves as a dust accumulation zone, separating the detection system from the main dust-laden airflow. The optical path is positioned to detect dust only in this specific accumulation zone, not throughout the entire chamber, thereby preventing false readings while maintaining detection capability
Solution Approach 2:
The system performs preliminary detection of dust accumulation in the cyclone chamber bottom before the dustbin becomes completely full. This early warning allows users to empty the dustbin proactively, preventing the harmful condition of filter clogging before it occurs
2Loss of time
If the dustbin capacity is increased, then the frequency of emptying is reduced, but dust accumulates at the bottom of the dust separation chamber and blocks the outlet
Solution Approach 1:
The optical detection system provides continuous feedback about dust accumulation levels in the cyclone chamber bottom. When dust reaches a certain level, the system generates a signal to alert the user, creating a feedback loop that enables proactive dustbin emptying before the outlet becomes blocked
Solution Approach 2:
The system enables preliminary action by detecting dust accumulation trends and alerting users before the dustbin reaches critical capacity. This allows users to empty the dustbin on their own schedule rather than waiting for functional problems to occur
3Measurement precision
If the optical path is positioned to detect dust in the dust separation chamber, then dust accumulation is detected, but the emitter and receiver become contaminated by dust
Solution Approach 1:
The patent applies local quality by positioning the optical detection system specifically at the bottom of the cyclone chamber where dust naturally accumulates. The detection is localized to this specific zone rather than attempting to monitor the entire chamber, allowing the emitter and receiver to remain in a relatively clean environment while still detecting dust accumulation 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
Effectively indicates when the dustbin is full, reducing filter clogging and maintenance needs by minimizing dust contamination and false alerts, ensuring efficient cleaning performance.
Implementation Method 1
a dust separation chamber (20) provided with an inlet (24) for receiving a dust laden air stream, and having an outlet (22) arranged at a bottom of the dust separation chamber, wherein the dust separation chamber (20) is adapted to provide a generally cyclonic airflow for separating dust from the dust laden air stream
Implementation Method 2
The cyclonic airflow in a dust separation chamber of cyclonic type which is connected to a dustbin typically provides a zone at the bottom of the dust separation chamber that during normal working conditions, when the dustbin is not yet full, is kept free from dust getting stuck along its inner wall
Implementation Method 3
an emitter positioned to transmit an electromagnetic signal into the dust separation chamber during operation of the vacuum cleaner, and a receiver positioned to receive the electromagnetic signal
Data Source
Figure 1
Figure 2
Figure 3~4b
AI summary
There is provided a dust detection system for a vacuum cleaner comprising a dust separation chamber (20) of cyclone type and having a separate dustbin (30) for collecting separated dust. The dust separation chamber is adapted to provide a generally cyclonic airflow for separating dust from a dust laden air stream, and is at a bottom (25) of the dust separation chamber connected via an outlet (22) to the dustbin. The dust detection system further comprises an emitter (41) positioned to emit an electromagnetic signal into the dust separation chamber during operation of the vacuum cleaner, and a receiver (42) positioned to receive the electromagnetic signal. The inventive concept is based on an understanding that when the dustbin becomes full, dust accumulates at the bottom of the dust separation chamber, i.e. stays rotating at the bottom, since it cannot enter the dustbin. The emitter and receiver are positioned in a bottom portion (26) of the dust separation chamber and are arranged to detect dust accumulating at the bottom portion during operation of the vacuum cleaner, thereby providing an indication of the dustbin being full.