Suction Unit Filter Presence Detection and Shutdown
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Solution Overview
Problem
Existing vacuum cleaners risk blowing dust particles into the environment when the filter system is removed and operation continues, especially with hazardous dust, and the suction power is compromised without proper sealing.
Innovation Solution
A method and device that check for the presence of a filter after commissioning, using an evaluation unit with algorithms or tables to determine if the filter is present, shutting down the suction unit if it's missing, based on pressure measurements and electrical data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the filter device is removed to enable easy cleaning or replacement, then the ease of operation is improved, but dust particles can be blown into the environment and the suction unit can be damaged
Solution Approach 1:
The system performs a preliminary check after commissioning to detect whether the filter device is present before allowing normal operation. The evaluation unit uses test data and algorithms to determine if the filter is installed, and only permits operation when the filter is confirmed present, thereby preventing dust emission and unit damage before they can occur
Solution Approach 2:
The system continuously monitors pressure measurement values from the pressure sensor device and provides feedback to the evaluation unit. Based on this feedback, the system can detect filter absence and generate switch-off signals, creating a closed-loop control system that prevents harmful operations
2Reliability
If pressure sensor device is installed to detect filter presence, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The pressure sensor device leverages the existing suction flow generated by the suction unit to automatically detect filter presence. The system uses the natural pressure differential created during normal operation, eliminating the need for additional active sensing mechanisms or complex detection hardware
Solution Approach 2:
The pressure sensor device serves multiple functions: it monitors suction performance, detects filter presence, and provides data for maintenance scheduling. This multi-functionality reduces the need for separate detection systems, thereby limiting the increase in device complexity
3Object-affected harmful factors
If the suction unit is switched off immediately when filter absence is detected, then the harmful factors are reduced, but the productivity is reduced due to operational interruptions
Solution Approach 1:
The system performs filter presence detection as a preliminary action after commissioning and before full operational mode. By checking filter status in advance and only permitting operation when the filter is confirmed present, the system prevents operational interruptions while maintaining safety
Solution Approach 2:
The system takes preliminary anti-action by preventing operation when the filter is absent, rather than shutting down after detection during operation. The evaluation unit generates switch-off signals only when filter absence is detected, and the system is designed to prevent startup without a filter, thereby avoiding both dust emission and productivity loss
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
Prevents dust from being blown into the environment by ensuring the vacuum cleaner shuts down if the filter is not present, maintaining safe operation and avoiding damage to the suction unit.
Implementation Method 1
a pressure sensor device which is arranged between the filter device and the suction unit and provides pressure measurement values on the suction flow downstream of the filter device and upstream of the suction unit
Data Source
Figure 1~2
AI summary
A method for operating a suction unit (10) which comprises a suction apparatus (30) and a removable filter device (26) is provided, wherein the suction apparatus (30) generates a suction flow which flows through the filter device (26) when the latter is arranged on the suction unit (10), in which, after the suction apparatus (30) is started up, it is checked whether the filter device (26) is present, and if it is then recognized that the filter device (26) is not present, the suction apparatus (30) is switched off, wherein an evaluation unit (46) uses test data and determines therefrom whether a switching-off signal for the suction apparatus (30) should or should not be generated, wherein the evaluation unit (46) uses an algorithm or a table in order to make a decision from the test data with regard to switching off the suction apparatus (30), and wherein the table contains at least one threshold value or the algorithm determines at least one threshold value, wherein the at least one threshold value is a threshold value for switching off the suction apparatus (30).