Electric roasting pan
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Solution Overview
Problem
Conventional electric roasting pans have low thermal efficiency and slow heating rates due to non-uniform heat transfer and significant thermal loss, leading to longer preheating times and compromised cooking quality.
Innovation Solution
An electric roasting pan with a heating layer formed from a composition including carbon nanotubes and a silicon-based adhesive, featuring unit heating region surfaces with independently controlled temperatures, and a power supply unit applying voltage to electrode pairs for efficient heat distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a heat wire is used as the heating unit with spacing from the roasting pan, then the device structure is simple and easy to manufacture, but thermal loss increases and heating rate becomes slow
Solution Approach 1:
The heating unit is merged with the roasting pan by forming a heating layer that is in direct surface contact with the pan. This eliminates the spacing between the heating element and the roasting pan, thereby reducing thermal loss and improving heating efficiency while maintaining manufacturing simplicity through the use of a coating process.
2Device complexity
If a heat wire is used as the heating unit, then the device structure is simple, but heat transfer becomes non-uniform and preheating time increases
Solution Approach 1:
The heating unit is transformed from a discrete heat wire into a continuous heating layer with uniform thickness that covers the entire inner surface of the roasting pan. This parameter change in the physical form and distribution of the heating element enables uniform heat transfer across the pan surface, significantly reducing preheating time while keeping the device structure relatively simple.
3Device complexity
If local heat application is used, then the heating mechanism is simple, but temperature deviation occurs and cooking quality deteriorates
Solution Approach 1:
The heating layer is designed to provide universal heat distribution across the entire inner surface of the roasting pan. By making the heating element cover the full surface area with uniform thickness, it ensures consistent temperature distribution throughout, eliminating local temperature deviations and improving cooking quality while maintaining a simple device structure.
4Use of energy by moving object
If a stone pan is used with high specific heat, then heat retention is good, but local temperature difference causes cracks and reduces durability
Solution Approach 1:
The heating layer acts as a thermal buffer that provides feedback control to the stone pan. It distributes heat uniformly across the pan surface, preventing localized overheating that would cause thermal stress and cracking. This feedback mechanism maintains the heat retention benefits of the stone pan while eliminating the durability issues caused by temperature deviations.
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 minimizes thermal loss, achieves rapid temperature response, and prevents temperature deviations, resulting in improved cooking quality and safety with high durability.
Implementation Method 1
an electrode in contact with the heating layer, wherein the heating layer is formed of a heating composition including carbon nanotubes
Implementation Method 2
the heating layer is formed of a heating composition including carbon nanotubes and a silicon-based adhesive
Data Source
AI summary
An electric roasting pan according to the present invention comprises: a roasting pan; a heating layer being in surface contact with the roasting pan and comprising a carbon nanotube and a silicone-based adhesive; and an electrode in contact with the heating layer. The electric roasting pan has excellent thermal efficiency thanks to the minimal heat loss thereof, can reach a target temperature within a short time to reduce a preheating time, and affords excellent cooking quality. Furthermore, the electric roasting pan can substantially prevent the occurrence of temperature deviation across the area of the roasting pan during a temperature increase and is of high durability and safety.