Air Quality Sensor Control for Kitchen Fire Prevention
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Solution Overview
Problem
Current technologies fail to effectively prevent household fires and poor air quality, as traditional smoke and carbon monoxide indicators react too late, and automatic fire extinguishing systems often trigger false alarms, leading to fatalities and structural damage, while existing solutions do not adequately address the high risk of kitchen fires and indoor air quality issues.
Innovation Solution
A method utilizing an air quality sensor to monitor and control home appliances and ventilation systems in stages, integrating with smart kitchen devices to adjust stove temperature and electricity supply, and using motion detectors and gas indicators to prevent fires and improve indoor air quality without causing unnecessary alarms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional smoke and carbon monoxide indicators are installed, then fire detection capability is provided, but they react too late and cause 80% of people to die due to fire gases before the indicators act
Solution Approach 1:
The system performs preliminary action by detecting harmful gases (CO, CO2, smoke particles) and taking preventive measures before a fire actually occurs. The staged control system activates ventilation and issues warnings when gas levels indicate potential fire hazards, allowing intervention before the situation becomes critical and fatal.
Solution Approach 2:
The fire safety function is segmented into multiple detection stages and control levels. Instead of a single threshold-based alarm, the system divides detection into progressive stages with different responses (ventilation activation, user warnings, appliance shutdown), allowing early intervention at lower gas concentration levels before fatal conditions develop.
2Reliability
If smoke indicators are installed in the kitchen, then fire detection is provided, but they cause too many false alarms due to cooking fumes
Solution Approach 1:
The system changes the detection parameters by monitoring multiple gas types (CO, CO2, smoke particles) simultaneously and using their combined patterns to distinguish between cooking fumes and fire hazards. The staged control approach with progressive responses allows the system to adapt to normal cooking conditions while maintaining sensitivity to actual fire dangers.
Solution Approach 2:
The air quality sensor performs multiple functions: it monitors for fire hazards, tracks indoor air quality from cooking, controls ventilation systems, and manages appliance operation. This multi-functionality allows the single device to handle both cooking fume management and fire detection without causing false alarms.
3Reliability
If automatic fire extinguishing systems are installed, then fire suppression capability is provided, but they react too late and people die due to fire gases
Solution Approach 1:
The system takes preliminary action by detecting and responding to harmful gas accumulation before a fire reaches explosive or fatal stages. The staged control system activates ventilation and shuts down appliances at early warning levels, preventing the development of conditions that would require emergency fire suppression.
Solution Approach 2:
The system applies preliminary anti-action by removing harmful gases through ventilation and eliminating ignition sources through appliance shutdown before fire conditions become critical. This preventive approach counteracts the development of fire hazards before they require active fire suppression measures.
4Reliability
If ventilation is increased to improve indoor air quality, then air quality deteriorates are prevented, but cooking and household chores are disturbed
Solution Approach 1:
The ventilation control is made dynamic and adaptive rather than fixed. The system adjusts ventilation intensity based on real-time air quality measurements and the staged control algorithm, providing increased ventilation only when and where needed to maintain air quality without unnecessarily disrupting cooking activities.
Solution Approach 2:
The system changes ventilation parameters (speed, activation timing) based on detected gas levels and cooking context. By monitoring multiple parameters (CO, CO2, smoke particles) and using staged control, the system optimizes ventilation to improve air quality while minimizing disruption to household chores.
5Reliability
If electricity supply is cut off to prevent fires, then fire safety is improved, but false alarms cause unnecessary disruption in the kitchen
Solution Approach 1:
The electricity control function is segmented into staged responses rather than a single on/off action. The system progresses through multiple control levels (ventilation activation, user warnings, selective appliance shutdown) based on the severity and persistence of detected hazards, allowing normal kitchen operation to continue while maintaining fire safety.
Solution Approach 2:
The system uses continuous feedback from air quality sensors to adjust control actions. By monitoring gas levels over time and responding to changes in air quality conditions, the system can distinguish between temporary cooking fume spikes and persistent fire hazards, cutting electricity only when necessary and maintaining kitchen operation continuity.
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 solution enhances fire safety and indoor air quality by promptly addressing hazardous conditions, reducing false alarms, and preventing fires before they start, while ensuring that cooking is not disrupted.
Implementation Method 1
A sensor watching indoor air quality is constructed using known indicator technologies indicating various gases and/or particles in the air
Implementation Method 2
Into the air quality sensor is also integrated an infrared thermometer, which is optically directed to the stove or other home appliance
Implementation Method 3
The presence and state of a user as well as his distance can also be observed on the basis of a motion detector integrated into the fire warning device
Data Source
Figure 1
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Figure 3
AI summary
The invention relates to a supervision and control method for preventing poor air quality and fire as well as issuing an alarm regarding a dangerous situation. The method uses an indicator unit (1) mounted to the ceiling or on a wall and provided with an air quality sensor (3), as well as one or more control and supervision units (8), which are as an additional device or as an integrated or programmatic characteristic connected to the home appliances or electrical devices. The air quality information measured by the air quality sensor (3) is sent from the indicator unit (1) to the control and supervision unit (8). The presence of a user is monitored and ventilation is controlled on the basis of air quality information. On the basis of air quality information, the operation and/or energy supply of also other home appliances or electrical devices is controlled than those concerned with ventilation. Control is implemented in stages taking into consideration the home appliances or electrical devices in use. The effect of control on air quality is monitored by the air quality sensor (3) and an alarm is issued and/or the supply of electricity to predetermined home appliances and/or electrical devices is cut off if, regardless of control, a preset alarm limit is exceeded, when the presence of a user is not detected.