Coffee Roaster Smoke Filtration With Voltage-Based Cleaning Alerts
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Solution Overview
Problem
Existing roasting systems for coffee beans in small shops or restaurants fail to accurately alert operators when electrostatic precipitators need cleaning, leading to potential health hazards due to unfiltered smoke emissions and equipment breakdowns.
Innovation Solution
A method and system that monitor the voltage at ionization wires and electrodes of an electrostatic precipitator during roasting, triggering a cleaning alarm if the voltage drops below a threshold for a predetermined time, ensuring timely maintenance and preventing false alarms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an electrostatic precipitator is used to filter smoke, then particulate matter is removed effectively, but the device requires regular cleaning which may be neglected leading to breakdowns
Solution Approach 1:
The system continuously monitors the voltage at ionization wires and electrodes, providing real-time feedback on the precipitator's operational status. When voltage drops indicate particle accumulation, the system automatically alerts operators to clean the device, ensuring consistent filtering performance and preventing breakdowns.
Solution Approach 2:
The electrostatic precipitator automatically adjusts its operation by monitoring its own voltage levels. The self-diagnosis capability allows the system to detect when cleaning is needed without external intervention, enabling operators to maintain optimal performance with minimal manual monitoring.
2Ease of operation
If cleaning alerts are based on maximal operating hours or quantity of beans roasted, then the system is simple to operate, but the alerts are not accurate and may trigger too late
Solution Approach 1:
The system replaces mechanical counting methods (tracking operating hours or bean quantity) with electrical measurement. By monitoring voltage changes at the ionization wires and electrodes, the system precisely detects when particle accumulation affects performance, providing accurate cleaning timing based on actual operational conditions rather than predetermined thresholds.
3Device complexity
If the electrostatic precipitator operates without monitoring, then the system is simpler, but breakdowns occur due to particle accumulation causing health risks
Solution Approach 1:
The monitoring system provides continuous feedback on the precipitator's voltage levels, enabling real-time detection of particle accumulation. When voltage drops below thresholds indicating reduced effectiveness, the system automatically alerts operators, ensuring timely cleaning and preventing harmful emissions without requiring complex continuous control mechanisms.
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
Accurately informs operators about the need for electrostatic precipitator maintenance, reducing health risks and equipment damage by ensuring continuous smoke filtration.
Implementation Method 1
an electrostatic precipitator, said electrostatic precipitator comprising at least one cell, said cell comprising ionization wires, collecting electrodes and repelling electrodes
Implementation Method 2
ionization wires
Implementation Method 3
monitoring the voltage V at the ionization wires and/or at the electrodes along the time of the roasting operation
Data Source
Figure 1~2
Figure 3
Figure 4A~4B
AI summary
The invention concerns a method to roast coffee beans in a roasting system, said system comprising : - a roasting apparatus (1), and - a smoke treating unit (2) configured to treat the smoke produced by the roasting apparatus, said smoke treating unit comprising at least an electrostatic precipitator (222), said electrostatic precipitator comprising at least one cell, said cell comprising ionization wires, collecting electrodes and repelling electrodes and said ionization wires being supplied with an electrical power in order to apply a high voltage V to the ionization wires, wherein, during each roasting operation implemented in the roasting apparatus, the method comprises the steps of : - monitoring the voltage V at the ionization wires and/or the electrodes along the time of the roasting operation, - if the monitored voltage becomes inferior to a pre-determined voltage threshold V0 during a period of time of the roasting operation, and - if said period of time, where the monitored voltage V is inferior to said lower voltage threshold V0 is superior to a pre-determined time threshold Δt, then displaying a cleaning alarm.