Cooking appliance
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Solution Overview
Problem
Mini ovens with electric heating sources face challenges in being portable due to power cables, which increase their volume and weight, and efficient cooling of coils is compromised, leading to reduced efficiency.
Innovation Solution
A mini oven design featuring an induction heating system with a working coil and a receiver coil for wireless power reception, utilizing an electromagnetic shielding plate to minimize electromagnetic interference and enhance cooling, allowing for compact and efficient operation without a power cable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a power cable is connected to supply power to the mini oven, then the oven can operate, but the volume and weight of the mini oven increase
Solution Approach 1:
The patent replaces the mechanical power cable connection system with a wireless power transmission system using electromagnetic fields. The receiver coil receives power wirelessly through electromagnetic induction from a transmitter, eliminating the need for physical cable connections and reducing the overall weight of the mini oven.
Solution Approach 2:
The patent introduces an electromagnetic field as an intermediary medium to transfer power between the power source and the mini oven without direct physical contact. The receiver coil and transmitter coil act as intermediaries that enable wireless energy transfer through electromagnetic induction, solving the contradiction between power supply and weight reduction.
2Power
If a power cable is connected to supply power to the mini oven, then the oven can operate, but the volume of the mini oven increases
Solution Approach 1:
The patent substitutes the mechanical power cable infrastructure with an electromagnetic field-based wireless power system. This eliminates the need for cable routing spaces, connection ports, and associated structural components, thereby reducing the overall volume of the mini oven while maintaining full power supply capability.
Solution Approach 2:
By using electromagnetic fields as an intermediary for power transmission, the patent eliminates the need for physical cable pathways and connection mechanisms within the oven structure. This intermediary approach allows power to be transmitted through space rather than requiring internal structural modifications, thus reducing volume.
3Volume of moving object
If the coil is disposed to reduce the volume, then the volume of the mini oven decreases, but the coil is not easily cooled, which leads to lowered efficiency
Solution Approach 1:
The patent addresses the cooling issue by transitioning from a two-dimensional planar coil arrangement to a three-dimensional立体 structure with enhanced surface area. The coil is designed with increased spatial complexity, including vertical extensions and multi-layer configurations, which provide additional cooling surfaces and improve heat dissipation efficiency without increasing the overall footprint volume of the oven.
Solution Approach 2:
The patent employs porous or lattice-structured coil supports and heat dissipation components that maximize surface area within limited volume. These porous structures allow improved airflow through the coil assembly, enhancing convective cooling efficiency while maintaining a compact form factor that does not increase overall oven volume.
4Ease of operation
If wireless power reception components are added to the mini oven, then the power cable can be eliminated, but the volume and weight of the mini oven increase
Solution Approach 1:
The patent optimizes the parameters of the wireless power reception system by using high-efficiency electromagnetic induction with minimal component mass. The receiver coil is designed with thin conductive materials and optimized winding densities that maximize power transfer efficiency while minimizing the weight of the coil assembly and associated electronic components.
Solution Approach 2:
The patent employs composite material structures for the wireless power reception components, combining lightweight materials with high electrical conductivity. The coil support structures use composite materials that provide mechanical strength with minimal weight, and the overall receiver assembly integrates multiple functions into composite structures that reduce total component weight while maintaining operational efficiency.
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 design enables a portable mini oven with reduced volume and weight, efficient heating, and improved wireless power supply efficiency, maintaining performance while eliminating the need for a power cable and ensuring effective cooling of coils.
Implementation Method 1
a receiver coil installed adjacent to the base and configured to wirelessly receive power for operating the cooking appliance
Implementation Method 2
a working coil for inductively heating an object in the cooking compartment installed adjacent to the bottom part
Implementation Method 3
an electromagnetic shielding plate provided between the working coil and the receiver coil and configured to shield electromagnetic waves
Data Source
AI summary
Disclosed herein is a cooking appliance. A working coil is provided at a lower portion of the cooking appliance. The working coil heats a tray disposed in a cooking compartment in an IH mode. A receiver coil wirelessly receiving external power is stacked below the working coil. An electromagnetic shielding plate is installed between the working coil and the receiver coil to partition a space in which the two coils are installed. The electromagnetic shielding plate shields an electromagnetic field or electromagnetic waves such that the electromagnetic field or electromagnetic waves in one of the two partitioned spaces does not leak to the other space located across the electromagnetic shielding plate.