Heating device having heating transistor unit
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Solution Overview
Problem
Existing heating devices for electronic apparatuses are costly and inefficient in extremely low-temperature environments, as they often rely on microcontrollers or central processing units that malfunction at low temperatures, and traditional heater boards are expensive.
Innovation Solution
A heating device comprising a heating transistor unit, a temperature sensing unit, and a driving unit that uses a temperature sensing voltage to drive the heating transistor unit, reducing production costs and ensuring normal operation even at extremely low temperatures, with the option of an activating unit to ensure the electronic apparatus is activated only when the temperature reaches a preset level.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a micro controller or central processing unit is used to control heating, then the heating device can be activated and controlled, but it cannot operate normally at extremely low temperatures (−40° C. or less)
Solution Approach 1:
The patent extracts the control function from the micro controller/central processing unit and implements it directly in the driving circuit using temperature sensing voltage comparison. This eliminates the need for complex low-temperature tolerant microcontrollers while achieving the same control objective through a simpler, more temperature-resilient approach.
Solution Approach 2:
The driving unit uses the temperature sensing voltage directly to control the heating transistor unit without requiring external microcontroller intervention. The system serves itself by using its own temperature sensing output to drive the heating element, eliminating the single point of failure at extremely low temperatures.
2Reliability
If a heater board is used for heating, then heating function is achieved, but the production cost increases
Solution Approach 1:
The patent replaces the expensive heater board with a heating transistor unit that can be implemented using standard semiconductor components. This substitution dramatically reduces production costs while maintaining the heating function, as transistor-based heating elements are significantly cheaper than dedicated heater boards.
Solution Approach 2:
The patent substitutes the mechanical/heater-board-based heating system with a transistor-based solid-state heating solution. This replacement eliminates the need for complex heater board assemblies and reduces manufacturing complexity and cost.
3Adaptability or versatility
If a heating device is added to electronic apparatus, then low-temperature operation is enabled, but the device complexity increases
Solution Approach 1:
The patent merges the temperature sensing function and heating control function into a single integrated driving unit. The temperature sensing unit's output voltage is directly used by the driving unit to control the heating transistor, eliminating the need for separate control circuits and microcontrollers. This integration significantly reduces device complexity while enabling low-temperature operation.
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
The solution effectively reduces production costs and ensures reliable heating and activation of electronic apparatuses in low-temperature conditions by using a heating transistor unit with higher low-temperature tolerance, allowing for efficient and precise heating control without the need for complex circuits like microcontrollers.
Implementation Method 1
a heating transistor unit, a temperature sensing unit and a driving unit. The temperature sensing unit is configured to sense an ambient temperature and accordingly output a temperature sensing voltage. The driving unit is coupled to the heating transistor unit and the temperature sensing unit, and configured to drive the heating transistor unit to perform heating based on the temperature sensing voltage.
Implementation Method 2
The temperature sensing unit is configured to sense an ambient temperature and accordingly output a temperature sensing voltage.
Data Source
AI summary
A heating device is provided. A temperature sensing unit is configured to sense an ambient temperature and accordingly output a temperature sensing voltage. A driving unit is coupled to a heating transistor unit and the temperature sensing unit, and configured to drive the heating transistor unit for performing heating based on the temperature sensing voltage. An activating unit is coupled to the temperature sensing unit, configured to output an activating signal based on the temperature sensing voltage when a temperature of the printed circuit board has risen up to a preset temperature. The heating device as provided can assure that the activating signal can be normally outputted by the heating device under an ambient at an extremely low temperature.