Lamp Protection System Using Thermal Fuses and Binding Members
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Solution Overview
Problem
Existing lamp protection systems face safety hazards due to improper ignition arcing and thermal runaway, which can lead to overheating and safety risks, as thermal fuses may not adequately address these issues.
Innovation Solution
A protection system for lamps comprising a circuit board with thermal electronic components and serially connected thermal fuses, where the thermal fuses are attached using binding members like phenolic resins or hot-melt adhesive, ensuring timely disconnection of the electrical circuit when temperature thresholds are exceeded, providing protection for both power supply inputs and branch circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thermal fuses are serially connected on copper pins to protect against improper ignition arcing, then the copper pins are protected from overheating, but other parts of the lamp may still overheat due to internal or external factors causing thermal runaway
Solution Approach 1:
The patent divides the protection function into multiple segments by placing thermal fuses at different locations: on copper pins for ignition arc protection and on thermal electronic components for overheating protection. This segmentation allows each thermal fuse to independently monitor and protect specific critical components, ensuring comprehensive coverage against different failure modes.
Solution Approach 2:
The patent introduces thermal electronic components (varistors, coils, or transformers) as intermediaries between the electrical circuit and the thermal fuse. These components serve as temperature sensors that detect overheating conditions and trigger the thermal fuse to blow, providing indirect but effective protection against thermal runaway in the main circuit.
2Reliability
If thermal fuses are attached to thermal electronic components, then the driving power supply and branch circuits are protected, but the binding member must withstand high temperature and adhesive force requirements
Solution Approach 1:
The patent uses composite material structure by combining the thermal fuse, binding member, and thermal electronic component into an integrated assembly. The binding member acts as a composite material that simultaneously provides mechanical attachment and thermal conduction functions, ensuring both strong bonding and effective heat transfer from the thermal electronic component to the thermal fuse.
Solution Approach 2:
The patent selects binding members with specific parameter ranges: adhesive force of 0.5-2.0 N/cm and thermal conductivity of 0.3-1.5 W/(m·K). By optimizing these parameters, the binding member achieves the dual function of strong mechanical attachment and effective thermal conduction, resolving the contradiction between binding strength and thermal protection effectiveness.
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 enhances safety by ensuring timely disconnection of the electrical circuit during overheating events, preventing safety hazards and protecting both power supply inputs and branch circuits from thermal runaway.
Implementation Method 1
The thermal fuse is closely attached to the thermal electronic component... after the temperature of the thermal electronic component raises to a blown threshold value of the thermal fuse
Implementation Method 2
The thermal fuse is fixed on the thermal electronic component with a binding member
Data Source
AI summary
A protection system for a lamp is provided. One or more control circuit boards and one or more thermal devices are disposed in the lamp. The control circuit board has an electrical circuit. The thermal device is disposed on the control circuit board and connected to the electrical circuit. The thermal device is attached to one or more thermal fuses with a binding member. Accordingly, the safety of the driving power supply can be increased. Moreover, the thermal fuse not only provides protection for the inputs of the driving power supply, but also provides protection for other main or branch circuits.