Multi-Antenna Oven Frequency Control for Asymmetric Food Heating
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Solution Overview
Problem
Traditional microwave ovens face challenges in evenly cooking asymmetric food items due to fixed microwave frequencies and lack of control over heating modes, leading to inefficient cooking and potential damage from electromagnetic interference between antennas.
Innovation Solution
An oven with multiple antennas that adjust radio wave frequency and intensity based on real-time cooking material properties, using a control unit to calculate and adjust radio wave information for optimal penetration and heating, minimizing interference and ensuring even cooking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single magnetron with fixed frequency is used, then the device complexity is reduced, but the cooking uniformity deteriorates because microwaves cannot penetrate cooked portions effectively
Solution Approach 1:
The single magnetron is divided into multiple magnetrons (first and second magnetrons) that operate at different frequencies. This segmentation allows each magnetron to target different portions of the cooking material, improving overall cooking uniformity while maintaining reasonable device complexity
Solution Approach 2:
The system changes the frequency parameter by using multiple magnetrons operating at different frequencies (2450 MHz and 915 MHz). This allows the microwave system to adapt to changing material properties during cooking, maintaining effective penetration and cooking uniformity
2Manufacturing precision
If multiple antennas are added to improve cooking uniformity, then the cooking effectiveness is improved, but electromagnetic interference between antennas increases causing potential damage
Solution Approach 1:
Different antennas are positioned at specific locations (first antenna at front, second antenna at rear) and operated at different frequencies. This local differentiation reduces electromagnetic interference between antennas while maintaining effective coverage throughout the cooking chamber
Solution Approach 2:
The system uses different frequency parameters for different antennas (2450 MHz for first antenna, 915 MHz for second antenna). This frequency differentiation minimizes electromagnetic interference between multiple antennas while preserving their individual effectiveness
3Device complexity
If the microwave frequency is kept fixed, then the device complexity is reduced, but the adaptability to changing material properties deteriorates
Solution Approach 1:
The system dynamically switches between different frequency modes (2450 MHz, 915 MHz, and combination modes) based on cooking progress and material properties. This dynamic adaptation allows the system to respond to changing material characteristics without requiring complex real-time frequency tuning mechanisms
Solution Approach 2:
The system changes the operating frequency parameter based on detected material properties and cooking stage. By switching between predefined frequency modes rather than continuously adjusting frequency, the system achieves adaptability while avoiding overly complex 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
The solution enables even cooking of asymmetric food items without rotating the cooking surface, prevents antenna damage by minimizing electromagnetic interference, and adjusts frequency to match changing material properties, resulting in efficient and effective cooking.
Implementation Method 1
a radio wave generator (200) coupled to the housing (100) and configured to generate radio wave to be radiated into the cavity (120)
Implementation Method 2
the oven may heat a cooking material by using microwaves
Implementation Method 3
a control unit (400) electrically connected to the radio wave generator (200) and configured to calculate radio wave information, which is information related to intensity, phase, and frequency of the radio wave to be generated by the radio wave generator (200)
Implementation Method 4
A cooking material contained in the cavity may be heated by the microwaves
Data Source
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AI summary
The present disclosure relates to an oven having a plurality of antennas and a method for controlling the same. The oven according to an embodiment of the present disclosure includes a single control unit for integrally controlling a plurality of antennas. The control unit calculates a ratio of intensity of radio wave radiated into a cavity through each antenna and intensity of radio wave reflected from the cavity, and uses the ratios to adjust a frequency of a radio wave to be radiated. Accordingly, as a cooking process is carried out, radio wave of an optimal frequency for heating a cooking material can be incident on the cooking material. Accordingly, the cooking process can be performed quickly and efficiently.