Fireplace Proximity Warning System for Post-Shutdown Burn Prevention
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Solution Overview
Problem
Existing fireplace safety systems primarily rely on temperature sensors and are only active when the fireplace is switched on, failing to alert users of potential hazards when the fireplace is switched off but still hot, which is the most dangerous period for injuries.
Innovation Solution
A proximity sensor-based warning system that detects objects approaching the fireplace, emitting alarms both when the fireplace is on and for a defined period after it's switched off, independent of temperature sensors, using technologies like capacitive, magnetic, infrared, or ultrasonic sensors, and audible or visual alarm devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If temperature sensor-based warning systems are used, then the system can detect hot surfaces, but the system fails to alert users when the fireplace is switched off but still hot
Solution Approach 1:
The system dynamically adjusts its operation mode based on the fireplace state. When the fireplace is on, the system operates in temperature monitoring mode. When the fireplace is switched off but temperature remains high, it automatically transitions to proximity warning mode, activating the proximity sensor and alarm device to provide continuous safety coverage throughout the cooling period.
Solution Approach 2:
The system changes its detection parameters based on operational phase. During active heating, it monitors temperature thresholds. After shutdown, it switches to proximity-based detection within a defined safety zone, adapting the warning mechanism to the changing thermal conditions and user risk exposure.
2Reliability
If proximity sensors are activated continuously, then user safety is maintained throughout cooling period, but energy consumption increases
Solution Approach 1:
The proximity sensor and alarm device operate periodically rather than continuously. The system activates the proximity warning function only during specific periods - namely, after the fireplace is switched off but while surfaces remain above a safe temperature threshold. Once the temperature drops below the safety threshold or a predetermined time elapses, the system enters standby mode, reducing energy consumption while maintaining safety coverage during the critical cooling period.
Solution Approach 2:
The system preliminarily determines fireplace shutdown status and initiates proximity monitoring in advance before the surfaces become safe to touch. By detecting the shutdown event and immediately activating proximity warnings during the cooling period, the system proactively prevents contact with hot surfaces rather than reacting after danger arises.
3Object-affected harmful factors
If temperature-based warning systems are used, then warnings are provided when fireplace is on, but no warning is provided when fireplace is off but still hot
Solution Approach 1:
The warning system performs multiple functions across different operational phases. It universally provides safety warnings both during active heating (via temperature monitoring) and after shutdown (via proximity detection). The system integrates both temperature sensing and proximity detection capabilities into a single multi-functional safety system that adapts its detection method to the current operational state, ensuring comprehensive coverage of all hazardous conditions.
Solution Approach 2:
The system dynamically switches between different warning mechanisms based on fireplace state. When the fireplace is on, temperature sensors monitor hot surfaces. When switched off but surfaces remain hot, the system transitions to proximity-based warnings. This dynamic adaptation ensures the warning system remains effective across all operational phases, from active heating through the entire cooling period.
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
Provides continuous user safety by alerting individuals of potential burns from hot surfaces even after the fireplace is extinguished, reducing the risk of injuries during the most hazardous time frame after shutdown, while conserving energy by activating the system only when necessary.
Implementation Method 1
the sensor having transmitting and receiving means, for generating and monitoring an electromagnetic field around said sensor
Implementation Method 2
Preferably, it includes a transmitter which emits electromagnetic waves and a receiver in order to detect the return signal
Implementation Method 3
Preferably, the proximity sensor of the invention emits infrared signals or ultrasounds signals
Implementation Method 4
The alarm device can be either a visual or an audible device, for example a LED which is illuminated in red and/or blinking. Preferably the alarm signal is an acoustic warning emitted by a loudspeaker
Data Source
AI summary
The present invention relates to a fireplace (1) in which a flame (3) can be lightened, said fireplace including a warning system, said system comprising: a proximity sensor (5) to detect the presence of object within an active volume, said volume surrounding at least a portion of the fireplace, an alarm device (6) to emit an alarm signal, a clock (9) to calculate a time elapsed since the switching off of the fireplace, and a processing unit (8) receiving as input data from the clock (8) and the proximity sensor (5), and outputting command signals to the alarm device (6). The alarm device (6) is activated by the processing unit (8) to generate an alarm signal when an object is detected by the proximity sensor (5) as entering said active volume and the fireplace (1) has been switched off since no later than a first pre-defined time interval. In addition, the invention relates to a method for warning when an object that enters the active volume of a fireplace.