Heating device and control method thereof
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Solution Overview
Problem
Electromagnetic wave heating devices struggle to accurately and efficiently thaw food due to varying electromagnetic wave absorption capacities of different foods and containers, leading to overheating and energy wastage.
Innovation Solution
A control method for an electromagnetic wave heating device that adjusts the load impedance of the electromagnetic wave generating module based on the load matching degree and weight of the object, determining when to stop the module from working to prevent overheating and optimize energy use, using a matching module to maximize load matching and adjust impedance accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If electromagnetic wave heating device continues heating based on fixed time control, then heating speed is maintained, but food may be overheated and energy is wasted
Solution Approach 1:
The patent implements feedback control by continuously monitoring the load matching degree during the heating process. When the load matching degree falls below a predetermined threshold, the system automatically terminates heating. This feedback mechanism replaces fixed time control with adaptive control based on real-time electromagnetic wave absorption characteristics, preventing overheating while maintaining efficient heating speed.
Solution Approach 2:
The patent transforms the static fixed-time heating control into a dynamic control system that adapts to changing food properties during heating. As food thaws and its electromagnetic wave absorption capacity changes, the system dynamically adjusts by monitoring load matching degree and terminates heating when optimal thawing is achieved, ensuring both speed and precision.
2Ease of operation
If electromagnetic wave heating device uses fixed time control, then system operation is simple, but energy is wasted and service life is reduced
Solution Approach 1:
The system maintains ease of operation by automatically monitoring load matching degree and terminating heating when the threshold is exceeded. This feedback-based automatic termination eliminates the need for complex user intervention while precisely controlling energy consumption, preventing both under-heating and over-heating scenarios that waste energy.
Solution Approach 2:
The heating device performs self-monitoring and self-termination based on load matching degree feedback. The system automatically determines when heating should stop without requiring user judgment or intervention, thereby simplifying operation while optimizing energy efficiency and extending the service life of the electromagnetic wave generating module.
3Reliability
If electromagnetic wave heating device heats continuously, then thawing completeness is ensured, but nutrient loss increases and quality deteriorates
Solution Approach 1:
The patent uses load matching degree as a feedback parameter to monitor the thawing process. When the load matching degree indicates that thawing is complete (falls below the threshold), the system immediately terminates heating. This prevents continued exposure to electromagnetic waves that would cause nutrient degradation and quality loss, while ensuring complete thawing is achieved.
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 method ensures accurate thawing, prevents overheating, reduces energy waste, and prolongs the service life of the electromagnetic wave generating module by determining when the load matching degree falls below a threshold, ensuring the object is thawed to the desired state without excessive heating.
Implementation Method 1
an electromagnetic wave generating module configured to generate an electromagnetic wave signal for heating an object to be processed
Implementation Method 2
a matching module configured to adjust load impedance of the electromagnetic wave generating module by adjusting its own impedance
Data Source
AI summary
The present invention provides a heating device and a control method thereof. The heating device includes an electromagnetic wave generating module and a matching module. The control method includes: controlling an electromagnetic wave generating module to generate an electromagnetic wave signal of a preset heating power; and determining a load matching degree of the electromagnetic wave generating module, and adjusting impedance of the matching module based on the load matching degree. When the load matching degrees determined within a preset adjustment time are all less than or equal to a first matching threshold, the electromagnetic wave generating module is controlled to stop working, such that the object to be processed that contains more components having a poor electromagnetic wave absorption capacity is prevented from being continuously heated after its moisture has been converted from ice to liquid.