Temperature Control Switch Circuit for Overheat Shutdown in Lamp Converters
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Solution Overview
Problem
Existing power converters for LED light strings suffer from poor heat dissipation, leading to potential damage of electronic components and safety hazards due to high temperatures in closed cavities, which can result in fires.
Innovation Solution
Incorporation of a temperature control switch circuit with a first or second temperature control unit, such as a bimetal temperature switch or a thermistor with a negative temperature coefficient, to detect and prevent operation when temperatures exceed a set threshold, thereby protecting the switch circuit from damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the power converter is enclosed in a closed cavity for protection, then the device structure is compact and protected, but heat dissipation becomes poor leading to high temperatures
Solution Approach 1:
The patent divides the enclosed cavity into multiple heat dissipation channels by adding heat dissipation holes in the insulating shell, allowing heat to escape through multiple paths while maintaining the protective enclosure structure
Solution Approach 2:
The patent introduces a heat dissipation fan as an intermediary device that actively facilitates heat removal from the closed cavity by forcing air circulation, thereby solving the heat accumulation problem without compromising the protective enclosure
2Device complexity
If electronic components are densely assembled on the PCB, then the device size is reduced, but heat generation increases and heat dissipation becomes more difficult
Solution Approach 1:
The patent transitions from two-dimensional heat dissipation (through the PCB) to three-dimensional heat dissipation by creating vertical airflow channels through heat dissipation holes in the insulating shell, allowing heat to escape in multiple spatial dimensions
3Reliability
If the insulating shell is made of PVC material for electrical insulation, then electrical safety is improved, but heat dissipation efficiency deteriorates
Solution Approach 1:
The patent segments the continuous insulating shell by creating heat dissipation holes, dividing the shell into multiple thermal zones that allow heat to pass through while maintaining the overall electrical insulation function of the PVC material
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 temperature control switch circuit effectively prevents component damage by discontinuing power supply when excessive heat is detected, ensuring safety and prolonging the lifespan of the electronic components.
Implementation Method 1
a first temperature control unit or a second temperature control unit for preventing the switch circuit body from being damaged by temperature
Implementation Method 2
a bimetal temperature switch or a thermistor with a negative temperature coefficient
Data Source
AI summary
The application discloses a temperature control switch circuit includes a switch circuit body, and also includes a first temperature control unit or a second temperature control unit for preventing the switch circuit body from being damaged by temperature, and the first temperature control unit or the second temperature control unit is electrically connected with the switch circuit body. The present disclosure has the following advantages. The first temperature control unit or the second temperature control unit is additionally arranged in the switch circuit body. The temperature is sensed or detected by the first temperature control unit or the second temperature control unit. When the temperature exceeds the set temperature, commercial power is unavailable, and a load connected with the switch circuit cannot operate, so that each unit in the switch circuit is protected.