Suction device and method for determining the filling level of a filter device of a suction device
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Solution Overview
Problem
Conventional suction devices incur significant costs for determining the filling level of filter devices due to the need for additional components like hoses, sealing elements, and pressure sensors, resulting in less precise and more expensive solutions.
Innovation Solution
A suction device with a control unit that uses pressure measurement values and characteristic data to determine the filling level, where the characteristic data is selected based on the attached attachment, allowing for precise filling level determination while reducing costs by utilizing existing components and empirical data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If differential pressure measurement is used to determine filter filling level, then filling level detection is achieved, but additional costs for hoses, sealing elements, pressure sensors and assembly increase significantly
Solution Approach 1:
The patent extracts the filling level detection function from a separate differential pressure measurement system and integrates it into the existing single pressure sensor system. By using the existing pressure sensor to measure pressure at a single location and comparing it against stored characteristic data, the system achieves filling level detection without requiring additional pressure sensors, hoses, or sealing elements.
Solution Approach 2:
The patent uses stored characteristic data (a digital copy of pressure-filling level relationships) to represent the complex differential pressure behavior. Instead of physically copying the differential pressure measurement setup, the system creates a digital model of how pressure varies with filling level for different attachment types, allowing accurate detection through data comparison rather than additional hardware.
2Device complexity
If a single pressure sensor is used without attachment-specific data, then device complexity is reduced, but filling level determination becomes less precise due to different throttling properties of various attachments
Solution Approach 1:
The patent performs preliminary action by storing characteristic data for multiple attachment types before actual operation. The system pre-calculates and stores the relationship between pressure and filling level for each attachment type, so that when an attachment is connected, the control unit can immediately select the appropriate characteristic data for accurate filling level determination without needing to adapt in real-time.
Solution Approach 2:
The patent changes the parameter set used for filling level determination based on the attached attachment type. By selecting different characteristic data sets corresponding to different attachment throttling properties, the system adapts its measurement evaluation parameters to match the current configuration, maintaining high precision with a single pressure sensor.
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
Enables precise display of the filter device's filling level with reduced costs, accounting for different throttling properties of various attachments and power settings, thereby improving operational efficiency and user experience.
Implementation Method 1
at least one pressure measuring system
Data Source
AI summary
A suction device with at least one fan for generating a suction air stream in a suction channel, at least one filter device for receiving suction material, at least one pressure measuring system and at least one control device, wherein the suction device is configured for coupling to a plurality of attachments on the suction channel, as well as a method for determining the filling level for a filter device of the suction device. The suction device and the method for determining the filling level ensures the most precise display possible of the filling level and also is simultaneously realizable in a cost-effective manner, in that the control device is configured and arranged for determining the filling level using at least one pressure measurement value and characteristic data, as well as for selecting the characteristic data used for the determination depending on the attachment connected to the suction device.