Microwave Heating Control via Temperature Profile Feedback
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Solution Overview
Problem
Existing high-frequency heating apparatuses lack precise temperature control for different types of food and cooking recipes, leading to variations in the quality and mouthfeel of cooked food, as they rely on simple power mode switching and reflection energy-based techniques that do not account for specific temperature profiles.
Innovation Solution
A high-frequency heating apparatus comprising a microwave source with adjustable frequency and output, a heating chamber, radiators, and a controller that uses a temperature detector to adjust the microwave output based on a programmed temperature profile, ensuring precise temperature control and uniform heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If simple power mode switching (low power/full power) is used for heating control, then the heating apparatus can operate with simple control logic, but the temperature control precision is insufficient for different types of food and cooking recipes
Solution Approach 1:
The patent applies dynamics by continuously adjusting the microwave output power based on real-time temperature feedback from the detector, rather than using fixed power modes. The controller dynamically modifies the microwave source output according to the temperature profile requirements, enabling precise temperature control for different food types and cooking recipes while maintaining relatively simple control logic.
2Reliability
If reflection energy-based control is used to prevent overheating, then the apparatus can stop output power to avoid overheating, but it cannot achieve the fine temperature adjustments needed for specific cooking recipes
Solution Approach 1:
The patent implements feedback control by using a temperature detector to continuously monitor the food temperature and feeding this information back to the controller. The controller then adjusts the microwave source output accordingly, enabling both overheating prevention and fine temperature adjustments for specific cooking recipes. This closed-loop feedback system provides both reliability and adaptability.
Solution Approach 2:
The patent applies parameter changes by continuously varying the microwave output power level based on the detected temperature and the required temperature profile. Instead of simply stopping power output to prevent overheating, the system dynamically adjusts the power parameter to achieve precise temperature control, enabling adaptability for different cooking recipes while maintaining reliable overheating prevention.
3Productivity
If fixed temperature profiles are not used, then the apparatus can heat food to desired temperatures with basic functions, but the quality and mouthfeel of cooked food varies due to insufficient temperature control
Solution Approach 1:
The patent applies preliminary action by pre-storing multiple temperature profiles in the controller that correspond to different food types and cooking recipes. Before cooking begins, the user selects the appropriate profile, and the system is pre-configured with the required temperature sequence. This enables consistent cooking quality while maintaining efficient heating, as the temperature control strategy is prepared in advance rather than calculated in real-time during cooking.
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
This solution allows for precise temperature adjustments according to specific cooking recipes, enhancing the quality and consistency of cooked food by accurately controlling temperature changes during the cooking process.
Implementation Method 1
a microwave source that generates a microwave and adjusts the frequency and output of the microwave
Implementation Method 2
The microwave source generates a microwave... The at least one radiator radiates the microwave into the heating chamber
Implementation Method 3
a temperature detector that detects the temperature in the heating chamber
Data Source
AI summary
A high-frequency heating apparatus includes: a heating chamber for accommodating a load; a microwave source; at least one radiator; a temperature detector; and a controller. The microwave source generates a microwave and adjusts the frequency and output of the microwave. The at least one radiator radiates a microwave into the heating chamber. The temperature detector detects the temperature in the heating chamber. The controller causes the microwave source to adjust the output of the microwave based on the temperature profile that defines the temperature change in the load, and the temperature in the heating chamber. According to this aspect, food can be heated in accordance with the temperature profile appropriate for the cooking recipe, thereby ensuring the quality of cooked food.