Coffee Roaster Smoke Filter Presence Detection
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Solution Overview
Problem
In small batch coffee roasting environments, the absence of active carbon filters or other smoke treatment components can go unnoticed, leading to harmful emissions and health issues due to the complexity of filter systems and the risk of operator error during maintenance.
Innovation Solution
A method using downstream pressure sensors to detect the presence of removable filtering devices in the smoke treating unit, where the smoke driver's pressure drop is measured and compared to a predetermined threshold to alert operators of missing filters, thereby ensuring proper operation and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an active carbon filter is used to treat smoke, then harmful emissions are reduced, but the operator may forget to replace the filter leading to untreated emissions
Solution Approach 1:
The system uses a pressure sensor to continuously monitor the pressure difference across the active carbon filter and provides feedback to the control unit. When the pressure difference indicates the filter is missing or clogged, the control unit generates an alarm signal to alert the operator, ensuring reliable detection and prevention of untreated emissions.
Solution Approach 2:
The system performs self-diagnosis by automatically monitoring its own filter status through pressure differential measurement. The smoke treating unit itself detects when the filter is missing or needs replacement, eliminating the need for manual checking and reducing operator error.
2Object-affected harmful factors
If multiple different filters are used in the smoke filter, then comprehensive smoke treatment is achieved, but the complexity of maintenance increases
Solution Approach 1:
The pressure sensor serves multiple functions: it detects when the active carbon filter is missing, monitors filter clogging status, and can indicate issues with other filtering components. This single sensor provides comprehensive monitoring for the entire smoke treatment system, simplifying maintenance despite the presence of multiple filter types.
3Productivity
If no active carbon bag is present in the filter, then roasting operation continues without interruption, but harmful smoke is emitted untreated
Solution Approach 1:
The system takes preliminary action by continuously monitoring filter presence and condition through pressure differential measurement. Before harmful emissions can occur, the control unit detects the missing or clogged filter and generates an alarm, preventing the situation where roasting continues with untreated emissions.
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
This method effectively informs operators of missing filters, preventing harmful emissions and ensuring a safe roasting environment by providing an alarm when a filter is absent, thus maintaining air quality and preventing health issues.
Implementation Method 1
measuring the pressure P at the pressure sensor downstream the removable filtering device, calculating the drop of pressure ΔP=P−Pref compared to a pressure of reference Pref
Data Source
AI summary
The invention concerns a method to check a roasting system (10), said system comprising: —at least one roasting apparatus (2), —at least one smoke treating unit (3), said smoke treating unit comprising at least one removable filtering device (221, 222, 223), —a smoke driver (23) configured to drive smoke from the roasting apparatus (2) to said at least one filtering device, wherein the at least one smoke treating unit (3) comprises at least one downstream pressure sensor (24), wherein the method comprises the steps of: —operating at least the smoke driver (23) to drive gas through the smoke filtering unit, —measuring the pressure P at the pressure sensor downstream the removable filtering device, —calculating the drop of pressure ΔP=P−Pref compared to a pressure of reference Pref, —comparing said drop of pressure ΔP to a predetermined threshold ΔP0 corresponding to the presence of said at least one removable filtering device upstream the pressure sensor, —if said drop of pressure ΔP is inferior to said predetermined threshold ΔP0, then displaying an alarm.