Dual Plug Adapter Heat Diffusion and Overcurrent Protection
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Solution Overview
Problem
Traditional power cords can overheat in high current applications, posing safety hazards due to thermal runaway conditions, and existing solutions either fail to prevent overheating or result in irreversible circuit opening.
Innovation Solution
A fail-safe circuit device that uses multiple plug connections to diffuse heat and interrupt the circuit in case of current overload or defective contact, ensuring safe operation by requiring uniform voltage and current across both plug pairs and incorporating over-voltage and over-current protective mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single plug connection is used for high current applications, then the device structure is simple, but the plug overheats and creates safety hazards
Solution Approach 1:
The invention divides a single high-current plug connection into multiple parallel plug connections. Each plug handles a portion of the total current, reducing the current density and heat generation at each individual plug contact point. This segmentation allows the system to handle high currents without excessive heating while maintaining structural simplicity through the use of standard plug-receptacle components.
2Reliability
If circuit breakers or fuses are used for protection, then overcurrent protection is provided, but they do not prevent overheating from poor contact conduction
Solution Approach 1:
The invention incorporates temperature sensors that continuously monitor the temperature at plug contact points before thermal runaway occurs. When elevated temperatures are detected indicating poor contact conduction, the system preemptively opens the circuit through solid-state switches, preventing the temperature from reaching dangerous levels. This preliminary action occurs faster and at lower temperatures than traditional thermal breakers or fuses.
Solution Approach 2:
The system uses temperature sensors to provide real-time feedback on the thermal condition of plug contacts. This feedback signal controls solid-state switching devices that can rapidly open or close circuits based on temperature conditions. This closed-loop feedback mechanism provides precise control over circuit operation, preventing overheating while maintaining power delivery when conditions are normal.
3Temperature
If existing temperature detection devices are used, then overheating is detected, but the circuit opens irrevocably requiring repair or replacement
Solution Approach 1:
The invention uses solid-state switching devices that can dynamically and rapidly change their conduction state based on real-time temperature feedback. Unlike mechanical thermal breakers that permanently open when tripped, these electronic switches can be quickly reopened after the temperature condition is corrected, allowing the system to resume normal operation without physical intervention or replacement of components.
4Temperature
If multiple plug connections are used to diffuse heat, then overheating is prevented, but the device complexity increases
Solution Approach 1:
The invention employs solid-state switching devices and control circuits that serve multiple functions: they control power delivery to individual plugs, monitor temperature conditions, provide overcurrent protection, and enable rapid circuit reopening. This multi-functionality reduces the need for separate dedicated components for each function, thereby limiting the increase in overall device complexity despite the use of multiple plug connections and advanced control mechanisms.
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 overheating and potential fires by distributing the load across dual plug connections, safely shutting down in case of errors like reversed wiring or loose connections, and providing a second level of protection against faulty wiring or defective circuit breakers.
Implementation Method 1
The device is a fail safe circuit. It prevents thermal overload by creating an open circuit condition. In the event of current overload or a defective plug contact, it interrupts the circuit. It accomplishes this by diffusing the heat created by the electrical contacts, via multiple inputs.
Implementation Method 2
Traditional power cords, when used in high current applications can become warm and, in some cases, even extremely hot. When a plug is inserted into a receptacle, it can overheat becoming a safety hazard.
Data Source
AI summary
The adapter is a circuit that allows the combination of two plugs on a standard duplex receptacle to be connected to a single electrical load. Each plug's hot and neutral outputs are controlled by a single throw electrical switch that is actuated by it's control input being transversely wired in parallel to the other plug. This arrangement doubles the connection's surface contact area since four prongs are used instead of two, thereby lowering the electrical resistance and increasing the current capacity. It has circuit protective devices wired in series between the hot output of each plug and the input of it's corresponding electrical switch. The circuit will not power up if a short, open or miss wired condition is encountered.