Toaster Cover Temperature Lockout for Fire Containment
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Solution Overview
Problem
Conventional toaster devices with covers pose a safety hazard as they automatically open when the bread is on fire, potentially causing burns or fire accidents due to the automatic lifting mechanism, which fails to prevent fire from escaping or spreading.
Innovation Solution
A control device with a microprocessor, sensor, and switching mechanism that maintains the toaster cover closed until the temperature drops below a preset level, ensuring the fire is extinguished before opening the cover and lifting the sliding frame, using sensors like thermistors or thermocouples to monitor temperature and control the power supply and cover operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cover is opened automatically when the set time is reached, then the toasting operation is completed and the bread is lifted, but the cover opens even when the bread is burning causing safety hazards
Solution Approach 1:
The patent employs temperature sensing feedback to monitor the internal toaster environment continuously. When the sensor detects abnormal high temperature indicating fire, it sends a signal to the control circuit to prevent cover opening, creating a closed-loop safety feedback mechanism that overrides the automatic opening function.
Solution Approach 2:
The control circuit acts as an intermediary between the timing mechanism and the cover opening mechanism. It receives both the time-based opening signal and the temperature-based safety signal, mediating between these conflicting inputs to determine whether the cover should open, thereby preventing fire spread while maintaining normal automatic operation.
2Object-affected harmful factors
If the cover remains closed during fire to prevent fire spread, then safety is improved, but the toasting operation cannot be completed normally
Solution Approach 1:
The patent converts the harmful high-temperature fire condition into a beneficial safety signal. The temperature sensor detects the fire condition and transforms this harmful thermal energy into useful information that triggers the control circuit to maintain the cover closed, thereby containing the fire and protecting users while the system remains operational for future use.
3Object-affected harmful factors
If a temperature sensor and control circuit are added to prevent fire spread, then safety is improved, but the device complexity increases
Solution Approach 1:
The temperature sensor automatically monitors the toaster interior and self-activates the safety function when fire is detected, without requiring user intervention or complex external control systems. The control circuit integrates seamlessly with existing toaster components, allowing the system to self-regulate based on temperature feedback while maintaining simplicity.
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
Prevents fire from escaping or spreading by keeping the cover closed until the fire is extinguished, enhancing user safety and reducing the risk of accidents by ensuring the toaster operates safely even when bread is burnt.
Implementation Method 1
the sensor is a negative temperature coefficient thermistor, a thermocouple temperature sensor or an infrared temperature sensor
Implementation Method 2
detecting a power supply of a heating element of the toaster device by the microprocessor
Data Source
AI summary
A toaster cover control device with fireproofing function comprises a cover sliding-frame or a cover opening-closing mechanism and a power switch (K), a cover switch (K1) and a control circuit that are provided in the toaster. The said control circuit is provided with a microprocessor. An output terminal of the control circuit is connected with a transistor (Q1). The said control circuit is connected with a sensor (S). The sensor detects the temperature of the toaster. The control circuit provides a control signal when the detected temperature exceeds the set temperature value, so that a circuit controlling cover action keeps the cover closed. The cover can be opened normally when the detected temperature is lower than the set temperature value. It is also provided with an application method of the said control device.