Suction device and method for determining a fill level of a filter device of a suction device
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Solution Overview
Problem
Existing suction devices incur significant costs for differential pressure measurement systems to determine filter filling levels, which are not precise and efficient.
Innovation Solution
A suction device with a control unit that uses measured pressure values and characteristic curve data to determine filter filling levels, selecting the appropriate data based on attached components, allowing for accurate and cost-effective monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If differential pressure measurement is used to determine filter filling level, then measurement precision is improved, but device complexity and manufacturing cost increase significantly
Solution Approach 1:
The patent extracts the pressure measurement function from a complex differential pressure system and implements it using a single pressure sensor combined with characteristic curve evaluation. Instead of measuring pressure differential directly across the filter, the system measures absolute pressure at one location and determines filter filling level indirectly through pre-stored characteristic curves that correlate pressure values with filling levels for different suction gun configurations.
Solution Approach 2:
The system changes the measurement approach from direct differential pressure measurement to indirect pressure-based evaluation using characteristic curves. The control device stores multiple characteristic curves representing different filling levels and suction gun types, and determines the current filling level by comparing measured pressure values against these curves, thereby simplifying the measurement system while maintaining precision.
2Measurement precision
If differential pressure measurement system is implemented, then measurement capability is improved, but manufacturing cost increases due to additional hoses, sealing elements, and sensors
Solution Approach 1:
The patent removes the need for complex differential pressure measurement infrastructure including additional hoses, sealing elements, and multiple pressure sensors. Instead, it uses a single pressure sensor positioned in the suction channel to measure absolute pressure, combined with software-based evaluation using stored characteristic curves to determine filter filling level.
Solution Approach 2:
The system uses pre-stored characteristic curves that represent the relationship between pressure and filter filling level for different suction gun configurations. These curves act as reference models that are copied into the control device's memory, allowing the system to evaluate filling levels by comparing measured pressure values against these pre-established patterns without requiring physical reference systems.
3Device complexity
If a single pressure measurement point is used, then device complexity is reduced, but measurement precision deteriorates due to inability to account for different attachments
Solution Approach 1:
The system achieves universal applicability across multiple suction gun types and filter configurations through software-based characteristic curve evaluation. The control device stores multiple characteristic curves in its memory, each representing a different suction gun configuration or filter type. The system automatically selects and uses the appropriate characteristic curve based on the detected attachment, allowing a single pressure sensor to accurately determine filling levels for various configurations without requiring configuration-specific hardware.
Solution Approach 2:
The system performs preliminary action by pre-calculating and storing characteristic curves that represent the relationship between pressure and filter filling level for different suction gun configurations. These curves are prepared in advance and stored in the control device's memory, enabling rapid and accurate filling level determination without requiring complex real-time calculations or additional sensors when a specific configuration is detected.
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 and cost-effective determination of filter filling levels by accounting for different attachments and power levels, reducing implementation costs while maintaining high accuracy.
Implementation Method 1
at least one pressure measuring device, which is designed to measure a pressure at at least one point in the suction channel
Implementation Method 2
at least one fan for generating a suction air flow in a suction channel
Implementation Method 3
the filter device can separate suction material from a suction air flow
Data Source
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AI summary
The present invention relates to a suction device (1) with at least one blower (2) for generating a suction airflow in a suction channel (3), at least one filter device (4) for receiving suction material (5), at least one pressure measuring device (6) and at least one control device (7), wherein the suction device (1) is designed for coupling with a plurality of different attachment devices (8) to the suction channel (3) and a method (100) for determining a fill level of a filter device (4) of a suction device (1).A suction device (1) and a method (100) for determining the fill level, which ensure the most precise possible indication of the fill level of the filter device (4), but are also cost-effective, are implemented by designing and setting up the control device (7) for determining a fill level of the filter device (4) using at least one pressure measurement value and characteristic curve data (105) and for selecting the characteristic curve data used for the determination depending on an attachment device (8) connected to the suction device (1).