A method and system for intelligent power control of a microwave oven for thawing

Abstract

This invention discloses an intelligent microwave oven power control method and system for defrosting. The method includes controlling a turntable to rotate uniformly one revolution at a first rotation speed when the microwave oven starts the defrosting program at a first power, while simultaneously monitoring the standing wave ratio (SWR) inside the microwave oven cavity in real time at a preset sampling frequency; generating an SWR sequence based on the SWR values ​​corresponding to each sampling point, and calculating a power adjustment coefficient corresponding to each turntable angle; generating a dynamic power control sequence corresponding to each turntable angle based on the power adjustment coefficient and the preset first power; controlling the turntable rotation during the defrosting stage, and calling the corresponding power value in the dynamic power control sequence for microwave emission according to the real-time turntable angle. This solves the problems of low energy utilization and unstable defrosting effect caused by fixed power output and uniform turntable rotation.

Description

Technical Field

[0001] This invention relates to the field of energy-saving kitchen appliances, and in particular to an intelligent microwave oven power control method and system for defrosting. Background Technology

[0002] Traditional microwave defrosting technology disperses microwave energy through uniform rotation of the turntable and fixed power output. However, limitations imposed by food shape, uneven density distribution, and localized differences in standing wave ratio (SWR) within the microwave cavity result in ineffective heating areas (areas with high SWR have low energy loss and poor defrosting efficiency) and uneven defrosting (areas with low SWR are prone to overheating). While existing improvements incorporate preset programs adapted to different food types, they cannot dynamically respond to real-time changes in microwave energy distribution and variations in storage conditions (such as freezing temperature profiles), leading to low energy utilization and unstable defrosting results. Summary of the Invention

[0003] To address at least one of the aforementioned technical problems, the present invention provides an intelligent microwave oven power control method and system for defrosting.

[0004] In a first aspect, the present invention provides an intelligent microwave oven power control method for defrosting, the method comprising:

[0005] When the microwave oven starts the defrosting program at the first power, the control turntable rotates at the first speed for one revolution, and at the same time, the standing wave ratio inside the microwave oven cavity is monitored in real time at a preset sampling frequency.

[0006] A standing wave ratio (SWR) sequence is generated based on the SWR values ​​corresponding to each sampling point, and the power adjustment coefficient corresponding to each turntable angle is calculated.

[0007] Based on the power adjustment coefficient and the preset first power, a dynamic power control sequence corresponding to each turntable angle is generated.

[0008] During the thawing phase, the turntable is rotated, and the corresponding power value in the dynamic power control sequence is called according to the real-time turntable angle to transmit microwaves.

[0009] Preferably, the method further includes:

[0010] The standing wave ratio (SWR) sequence is divided into several segmented intervals, and the average SWR within each segmented interval is taken to obtain the power adjustment coefficient for each segment.

[0011] The power adjustment coefficient of the segment satisfies the following formula:

[0012]

[0013] In the formula, W n SWR represents the power adjustment coefficient for segmented interval n. nThis indicates that the average standing wave ratio of the segmented interval n is taken.

[0014] Preferably, the method further includes:

[0015] In the segmented intervals where the average standing wave ratio is less than the preset standing wave ratio threshold, the turntable is controlled to rotate at a second speed lower than the first speed.

[0016] In the segmented intervals where the average standing wave ratio is greater than or equal to a preset standing wave ratio threshold, the turntable is controlled to rotate at a third speed higher than the first speed.

[0017] Preferably, the second and third rotational speeds are described as follows:

[0018]

[0019] In the formula, v j This represents the real-time speed of the j-th segment interval, v0 represents the first speed, β is the speed adjustment coefficient, and SWR avg,j SWR represents the mean standing wave ratio (SWR) of the j-th segment interval. th This indicates the preset VSWR threshold.

[0020] Preferably, before controlling the turntable to rotate one revolution at a first speed when the microwave oven starts the defrosting program at the first power, the method further includes:

[0021] Obtain the storage information of the food to be thawed, including the freezing temperature profile and storage duration;

[0022] The initial temperature control curve corresponding to the defrosting mode is generated based on the stored information, and the first power and the first rotation speed are determined.

[0023] Preferably, after calling the corresponding power value in the dynamic power control sequence according to the real-time turntable angle for microwave transmission, the method further includes:

[0024] Based on the real-time VSWR change trend during the thawing process, the power adjustment coefficient is dynamically updated, and a new dynamic power adjustment sequence is generated.

[0025] Secondly, the present invention also provides an intelligent microwave oven power control system for defrosting, the system comprising:

[0026] The standing wave ratio monitoring module is used to control the turntable to rotate at a constant speed of one revolution when the microwave oven starts the defrosting program at the first power, and at the same time monitor the standing wave ratio inside the microwave oven cavity in real time at a preset sampling frequency.

[0027] The power adjustment coefficient calculation module is used to generate a standing wave ratio sequence based on the standing wave ratio values ​​corresponding to each sampling point, and to calculate the power adjustment coefficient corresponding to each turntable angle.

[0028] The dynamic power control sequence generation module is used to generate a dynamic power control sequence corresponding to each turntable angle based on the power adjustment coefficient and the preset first power.

[0029] The power control module for the thawing stage is used to control the rotation of the turntable during the thawing stage and to call the corresponding power value in the dynamic power control sequence for microwave transmission based on the real-time turntable angle.

[0030] Preferably, the system further includes:

[0031] The power adjustment sequence update module is used to dynamically update the power adjustment coefficient and generate a new dynamic power adjustment sequence based on the real-time VSWR change trend during the thawing process.

[0032] Thirdly, the present invention also provides an electronic device including a processor and a memory, the memory being used to store computer program code, the computer program code including computer instructions, wherein when the processor executes the computer instructions, the electronic device performs the method as described in the first aspect above and any possible implementation thereof.

[0033] Fourthly, the present invention also provides a computer-readable storage medium storing a computer program, the computer program including program instructions that, when executed by a processor of an electronic device, cause the processor to perform a method as described in the first aspect above and any possible implementation thereof.

[0034] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0035] 1) This invention monitors the standing wave ratio (SWR) inside the microwave oven cavity in real time when the defrosting program starts and performs data preprocessing to remove outliers. It generates a sequence based on the SWR values ​​corresponding to each sampling point and calculates the power adjustment coefficient, thereby generating a dynamic power control sequence corresponding to the turntable angle. Finally, it calls the corresponding power value for microwave emission based on the real-time turntable angle. This solves the problems of low energy utilization and unstable defrosting effect caused by fixed power output and uniform turntable rotation. It achieves dynamic optimization and adjustment of microwave energy distribution, significantly improves energy utilization efficiency, improves defrosting uniformity, and can adapt to the defrosting needs of different food types and storage conditions, thus greatly improving the overall efficiency of the microwave oven defrosting process.

[0036] 2) This invention monitors the standing wave ratio (SWR) data during the turntable rotation in real time. Using the starting angle of the current window as a reference, the window range is gradually expanded until the difference between the maximum and minimum SWR within the window exceeds a preset SWR difference threshold. The current window range is then defined as an independent partition. Subsequently, the ending angle of this partition is used as the starting angle of the next window, and the above expansion and determination process is repeated until the partitioning of one revolution of the turntable is completed. Through a dynamic window sliding mechanism, the partition boundaries are adaptively adjusted according to the SWR fluctuations to ensure that the SWR difference within each partition is controllable. This allows for precise matching of the local characteristics of the food shape, avoids the mechanical limitations of fixed-angle partitioning, and improves the flexibility of power adjustment and the uniformity of defrosting.

[0037] 3) Based on the comparison between the average standing wave ratio and a preset threshold, this invention reduces the rotation speed in the low standing wave ratio region to prolong the microwave action time, and increases the rotation speed in the high standing wave ratio region to avoid local overheating, thereby significantly improving the utilization efficiency of microwave energy and ensuring thawing uniformity. At the same time, the flexible configuration of the rotation speed adjustment coefficient β adapts to the thawing needs of different foods, effectively maintaining the taste and nutritional value of the food, and solving the problem of uneven energy distribution caused by the traditional fixed rotation speed mode.

[0038] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention or the background art, the accompanying drawings used in the embodiments of the present invention or the background art will be described below.

[0040] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the specification, serve to illustrate the technical solutions of this disclosure.

[0041] Figure 1 A flowchart illustrating an intelligent microwave oven power control method for defrosting, provided in an embodiment of the present invention;

[0042] Figure 2 A schematic diagram of the speed regulation control provided in an embodiment of the present invention;

[0043] Figure 3 This is a schematic diagram of an intelligent microwave oven power control system for defrosting, provided as an embodiment of the present invention. Detailed Implementation

[0044] To enable those skilled in the art to better understand the present invention, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0046] Traditional microwave defrosting technology suffers from ineffective heating areas and uneven defrosting due to the uneven distribution of food shape and density, as well as local differences in the standing wave ratio within the microwave cavity.

[0047] Please see Figure 1 , Figure 1 This is a flowchart illustrating an intelligent microwave oven power control method for defrosting, provided as an embodiment of the present invention. Figure 1 As shown, the method includes:

[0048] S100: When the microwave oven starts the defrosting program at the first power, it controls the turntable to rotate at the first speed for one revolution, and at the same time monitors the standing wave ratio inside the microwave oven cavity in real time at a preset sampling frequency.

[0049] When the microwave oven starts the defrosting program at the first power, the control turntable rotates uniformly at the first speed for one revolution. Simultaneously, the standing wave ratio (VSWR) inside the microwave oven cavity is monitored in real time at a preset sampling frequency (the collected VSWR data is preprocessed to remove outliers). Specifically, the microwave oven's turntable drive module uses a closed-loop control system composed of a stepper motor and a gear transmission mechanism. A PID algorithm stabilizes the first speed at 3 revolutions per minute. A directional coupler is used to collect microwave transmission signals in real time. A detector converts the microwave energy into a 0-5V voltage signal, which is then digitized by a 16-bit analog-to-digital converter at a sampling frequency of 100Hz. The VSWR is calculated using the formula VSWR=(1+Γ) / (1-Γ), where Γ is the reflection coefficient, obtained by real-time monitoring of the forward and reverse power ratio. During the data preprocessing stage, the acquired VSWR sequence is smoothed using a sliding window with a window size of 3 sampling points. Outliers other than 3σ are identified and removed based on the Z-score method to ensure the validity of the data for subsequent analysis. For example, if the VSWR of a sampling point suddenly jumps to more than twice the average VSWR of the cavity, the data point will be marked as invalid.

[0050] S200 generates a standing wave ratio sequence based on the standing wave ratio values ​​corresponding to each sampling point, and calculates the power adjustment coefficient corresponding to each turntable angle;

[0051] A standing wave ratio (SWR) sequence is generated based on the SWR values ​​corresponding to each sampling point, and a power adjustment coefficient is calculated for each turntable angle. The power adjustment coefficient is defined as the reciprocal of the SWR, meaning that the larger the SWR, the smaller the corresponding power adjustment coefficient. This is because areas with high SWR often correspond to areas where food absorbs microwave energy less efficiently. Maintaining high power output in such areas may lead to energy waste or even local overheating. Areas with SWR close to 1 indicate higher energy absorption efficiency, so it is necessary to maintain or appropriately increase the power output. For example, in a certain sampling, it was found that the power adjustment coefficient for an area with an SWR of 3 was 0.33. This means that when the turntable rotates to this area, the microwave power should be reduced to about one-third of the reference power to avoid energy waste and improve the defrosting effect.

[0052] In this embodiment, the preprocessed VSWR data is spatially mapped according to the turntable rotation angle (e.g., each 1° is an angle unit), generating a VSWR sequence with angle as the x-axis and VSWR value as the y-axis. For each turntable angle, a power adjustment coefficient is calculated based on its corresponding VSWR value, specifically using the formula: Power Adjustment Coefficient = 1 / VSWR. For example, when the VSWR at a certain angle is 2, the adjustment coefficient is 0.5; when the VSWR is 1.2, the power adjustment coefficient is 0.83. Furthermore, to eliminate the influence of extreme values, the power adjustment coefficient is normalized to map it to the range of 0.2 to 1, ensuring that the power adjustment range is within a controllable range.

[0053] S300, based on the power adjustment coefficient and the preset first power, generate a dynamic power control sequence corresponding to each turntable angle;

[0054] Based on the power adjustment coefficient and the first power, a dynamic power control sequence corresponding to each turntable angle is generated. The dynamic power is the base power value multiplied by the corresponding power adjustment coefficient. Specifically, assuming the first power is set to 800W, and the power adjustment coefficient at a certain turntable angle is 0.5, then the dynamic power at that angle is 400W. This dynamic power allocation method can flexibly adjust the microwave output power according to the energy distribution characteristics of different areas in the cavity, thereby effectively solving the problem of uneven defrosting caused by the fixed power of traditional microwave ovens. At the same time, in order to achieve more precise power adjustment, pulse width modulation (PWM) technology is also introduced to finely control the output signal of the microwave generator. For example, when the target power is 400W, the actual output power can be stabilized near this value by adjusting the PWM duty cycle, thereby ensuring the precise delivery of microwave energy. In addition, considering that the defrosting requirements of different types of food may vary, a set of multi-mode power curve templates can be pre-stored for users to choose from, so as to better meet personalized defrosting needs.

[0055] In this embodiment, a dynamic power control sequence is generated based on the power adjustment coefficients for each angle obtained in step S200, combined with the reference power value. Specifically, the dynamic power value corresponding to each turntable angle is the reference power × power adjustment coefficient × normalization factor, where the normalization factor is used to compensate for the overall energy loss caused by power adjustment. For example, when the reference power is 800W and the adjustment coefficient for a certain angle is 0.5, the actual output power is 800 × 0.5 × 1.2 = 480W (assuming the normalization factor is 1.2). In addition, the reference power is dynamically adjusted according to the storage conditions of the food (such as the freezing temperature curve): for deeply frozen food with an initial temperature below -15℃, the reference power is increased to 1000W to accelerate defrosting; for lightly frozen food with a temperature between -5℃ and 0℃, the reference power is reduced to 600W to prevent surface overheating.

[0056] The S400 controls the rotation of the turntable during the thawing phase and calls the corresponding power value in the dynamic power control sequence to transmit microwaves based on the real-time turntable angle.

[0057] During the defrosting phase, while controlling the turntable rotation, microwave transmission is performed based on the real-time turntable angle, using the corresponding power value from the dynamic power control sequence. A high-precision angle encoder acquires the turntable's rotational position in real time, and a closed-loop feedback control system rapidly responds to angle changes, ensuring accurate microwave power output according to the predetermined dynamic power control sequence. For example, when the turntable rotates to a region with a high standing wave ratio (SWR), the microwave power is reduced to minimize energy loss; conversely, when the turntable rotates to a region with a low SWR, the power output is restored or increased, thereby achieving dynamic optimization of the microwave energy distribution within the cavity. In one possible embodiment, a temperature sensor can be used to monitor changes in the food surface temperature in real time, and this temperature information can be input as an auxiliary parameter into the power adjustment model, resulting in a more intelligent defrosting strategy. For instance, if a region's temperature rises too rapidly, even with a low SWR, the power output can be appropriately reduced to prevent localized overheating.

[0058] In this embodiment, the standing wave ratio (SWR) inside the microwave oven cavity is monitored in real time when the defrosting program is started, and data preprocessing is performed to remove outliers. A sequence is generated based on the SWR values ​​corresponding to each sampling point, and a power adjustment coefficient is calculated. This generates a dynamic power control sequence corresponding to the turntable angle. Finally, the corresponding power value is called according to the real-time turntable angle for microwave emission. This effectively solves the problems of low energy utilization and unstable defrosting effect caused by fixed power output and uniform turntable rotation. It realizes dynamic optimization and adjustment of microwave energy distribution, significantly improves energy utilization efficiency, improves defrosting uniformity, and can adapt to the defrosting needs of different food types and storage conditions, thereby greatly improving the overall efficiency of the microwave oven defrosting process.

[0059] Preferably, the method further includes:

[0060] The standing wave ratio (SWR) sequence is divided into several segmented intervals, and the average SWR within each segmented interval is taken to obtain the power adjustment coefficient for each segment.

[0061] The power adjustment coefficient of the segment satisfies the following formula:

[0062]

[0063] In the formula, W n SWR represents the power adjustment coefficient for segmented interval n. n This indicates that the average standing wave ratio of the segmented interval n is taken.

[0064] In this embodiment, the VSWR sequence generated in step S200 is divided into several segmented intervals. For example, it can be divided based on the rotation angle of the turntable (e.g., each 30° segment is considered as one interval). The average VSWR within each segmented interval is taken. For example, within a 30° angle interval, if the acquired VSWR sequence is [2.5, 2.7, 2.6], then the average VSWR of that interval is (2.5 + 2.7 + 2.6) / 3 = 2.6. Based on the average VSWR obtained above, the power adjustment coefficient for each segmented interval is calculated. Specifically, the formula is used... Among them W n SWR represents the power adjustment coefficient for the nth segment interval. n This represents the average VSWR of the segmented interval. For example, if the average VSWR of a certain segmented interval is 2.6, then its corresponding power adjustment coefficient is W. n =1 / 2.6≈0.385.

[0065] In one possible embodiment, the standing wave ratio (SWR) data during the turntable rotation is monitored in real time. Using the current window's starting angle as a baseline, the window range is gradually expanded until the difference between the maximum and minimum SWR within the window exceeds a preset SWR difference threshold. The current window range is then defined as an independent partition. Subsequently, the ending angle of this partition is used as the starting angle of the next window, and the above expansion and determination process is repeated until the turntable's full rotation is completed. This embodiment utilizes a dynamic window sliding mechanism to adaptively adjust the partition boundaries based on SWR fluctuations, ensuring that the SWR difference within each partition is controllable. This precisely matches the local characteristics of the food shape, avoiding the mechanical limitations of fixed-angle partitioning and improving the flexibility of power adjustment and defrosting uniformity.

[0066] See Figure 2 Preferably, the method further includes:

[0067] S410, in the segmented intervals where the average value of the standing wave ratio is less than the preset standing wave ratio threshold, control the turntable to rotate at a second speed lower than the first speed.

[0068] S420, in the segmented interval where the average value of the standing wave ratio is greater than or equal to the preset standing wave ratio threshold, control the turntable to rotate at a third speed higher than the first speed.

[0069] When the average standing wave ratio (SWR) within a certain segment is detected to be below a set threshold, it indicates that the food in that area has a high microwave energy absorption efficiency. In this case, the turntable speed is reduced to a second rotation speed (e.g., from 3 rpm to 2 rpm) to ensure the food can fully absorb energy. If the average SWR of a certain area is above the set threshold, the turntable speed is increased to a third rotation speed (e.g., from 3 rpm to 4 rpm). This reduces the risk of localized overheating, as food in these areas may have lower microwave energy absorption efficiency.

[0070] Preferably, the second and third rotational speeds are described as follows:

[0071]

[0072] In the formula, v j This represents the real-time speed of the j-th segment interval, v0 represents the first speed, β is the speed adjustment coefficient, and SWR avg,j SWR represents the mean standing wave ratio (SWR) of the j-th segment interval. th This indicates the preset VSWR threshold.

[0073] In this embodiment, a preset standing wave ratio (SWR) threshold is used. t =1.5, initial speed v0 = 5 rpm, adjustment coefficient β = 0.2. After the turntable rotates one revolution, the VSWR data is divided into multiple segment intervals according to the sliding window, and the average VSWR in each interval is calculated. If the SWR of a certain segment is... avg,j =1.2 (less than the threshold), then according to the formula, the rotation speed of this segment is calculated to be 4.8 rpm. The turntable rotates at a low speed of 4.8 rpm in this segment to prolong the microwave action time and avoid energy waste in the low-loss region. If the SWR of a certain segment is... avg,j =2.0 (greater than the threshold), then substituting into the calculation formula, the rotation speed is 5.33 rpm. The turntable rotates at a high speed of 5.33 rpm in this segment, shortening the residence time in the high-loss area and preventing local overheating. For high-moisture foods (such as meat), β = 0.3 is set to enhance the sensitivity of the rotation speed to the standing wave ratio. For low-moisture foods (such as bread), β = 0.1 is set to reduce rotation speed fluctuations and ensure defrosting stability.

[0074] In this embodiment, based on the comparison between the average standing wave ratio and a preset threshold, the rotation speed is reduced in the low standing wave ratio region to prolong the microwave action time, and the rotation speed is increased in the high standing wave ratio region to avoid local overheating, thereby significantly improving the utilization efficiency of microwave energy and ensuring thawing uniformity. At the same time, the flexible configuration of the rotation speed adjustment coefficient β adapts to the thawing needs of different foods, effectively maintaining the taste and nutritional value of the food, and solving the problem of uneven energy distribution caused by the traditional fixed rotation speed mode.

[0075] Preferably, before controlling the turntable to rotate one revolution at a first speed when the microwave oven starts the defrosting program at the first power, the method further includes:

[0076] Obtain the storage information of the food to be thawed, including the freezing temperature profile and storage duration;

[0077] The initial temperature control curve corresponding to the defrosting mode is generated based on the stored information, and the first power and the first rotation speed are determined.

[0078] By scanning QR codes or RFID tags on food packaging, the microwave oven can automatically obtain relevant information about the food to be defrosted, including but not limited to freezing temperature profiles, storage time, food type (such as meat, seafood, vegetables, etc.), weight, and recommended defrosting parameters. Based on this information, it calculates the most suitable defrosting method for the food. For example, meat that has been kept at extremely low temperatures for a long time may require a gentler and longer defrosting process; while vegetables that have been refrigerated for a short time may be suitable for a faster defrosting method. Based on the analysis results, a personalized temperature control curve is generated. This curve not only considers the optimal defrosting temperature range for the food but also incorporates the microwave oven's own heating characteristics to ensure that all parts of the food are heated evenly throughout the defrosting process. According to the generated temperature control curve, the microwave oven will automatically set the initial power level and turntable speed when starting the defrosting program. For example, if the temperature control curve indicates that a slow and stable heating is required, a lower initial power will be selected to avoid localized overheating, and a moderate initial speed will be set to ensure that all sides of the food receive uniform microwave radiation.

[0079] Preferably, after calling the corresponding power value in the dynamic power control sequence according to the real-time turntable angle for microwave transmission, the method further includes:

[0080] Based on the real-time VSWR change trend during the thawing process, the power adjustment coefficient is dynamically updated, and a new dynamic power adjustment sequence is generated.

[0081] The initial dynamic power adjustment sequence is generated based on the VSWR data collected during the first rotation of the turntable, with a preset VSWR change threshold of 0.3. The update cycle is one data sampling per rotation. During the thawing process, the VSWR value of the current angle interval is collected in real time and compared with the average VSWR of the corresponding initial interval. The magnitude of the change is calculated. If the magnitude of the change is greater than or equal to the preset VSWR change threshold, it is determined that the VSWR of that interval has changed significantly (e.g., due to a decrease in absorption capacity caused by localized thawing of the food). The power adjustment coefficient for that interval is recalculated and the corresponding value in the original sequence is replaced to generate a new dynamic power adjustment sequence. Microwave transmission is controlled according to the updated power value.

[0082] In summary, the method provided in this embodiment can achieve at least the following effects:

[0083] 1) This invention monitors the standing wave ratio (SWR) inside the microwave oven cavity in real time during the defrosting program and performs data preprocessing to remove outliers. It generates a sequence based on the SWR values ​​corresponding to each sampling point and calculates the power adjustment coefficient, thereby generating a dynamic power control sequence corresponding to the turntable angle. Finally, it calls the corresponding power value for microwave emission based on the real-time turntable angle. This effectively solves the problems of low energy utilization and unstable defrosting effect caused by fixed power output and uniform turntable rotation. It achieves dynamic optimization and adjustment of microwave energy distribution, significantly improves energy utilization efficiency, improves defrosting uniformity, and can adapt to the defrosting needs of different food types and storage conditions, thus greatly improving the overall efficiency of the microwave oven defrosting process.

[0084] 2) This invention monitors the standing wave ratio (SWR) data during the turntable rotation in real time. Using the starting angle of the current window as a reference, the window range is gradually expanded until the difference between the maximum and minimum SWR within the window exceeds a preset SWR difference threshold. The current window range is then defined as an independent partition. Subsequently, the ending angle of this partition is used as the starting angle of the next window, and the above expansion and determination process is repeated until the partitioning of one revolution of the turntable is completed. Through a dynamic window sliding mechanism, the partition boundaries are adaptively adjusted according to the SWR fluctuations to ensure that the SWR difference within each partition is controllable. This allows for precise matching of the local characteristics of the food shape, avoids the mechanical limitations of fixed-angle partitioning, and improves the flexibility of power adjustment and the uniformity of defrosting.

[0085] 3) Based on the comparison between the average standing wave ratio and a preset threshold, this invention reduces the rotation speed in the low standing wave ratio region to prolong the microwave action time, and increases the rotation speed in the high standing wave ratio region to avoid local overheating, thereby significantly improving the utilization efficiency of microwave energy and ensuring thawing uniformity. At the same time, the flexible configuration of the rotation speed adjustment coefficient β adapts to the thawing needs of different foods, effectively maintaining the taste and nutritional value of the food, and solving the problem of uneven energy distribution caused by the traditional fixed rotation speed mode.

[0086] See Figure 3 In one embodiment, an intelligent microwave oven power control system for defrosting is also provided, the system comprising:

[0087] The standing wave ratio monitoring module 100 is used to control the turntable to rotate at a first speed for one revolution when the microwave oven starts the defrosting program at the first power, and at the same time monitor the standing wave ratio inside the microwave oven cavity in real time at a preset sampling frequency.

[0088] The power adjustment coefficient calculation module 200 is used to generate a standing wave ratio sequence based on the standing wave ratio values ​​corresponding to each sampling point, and to calculate the power adjustment coefficient corresponding to each turntable angle.

[0089] The dynamic power control sequence generation module 300 is used to generate a dynamic power control sequence corresponding to each turntable angle based on the power adjustment coefficient and the preset first power.

[0090] The power control module 400 for the thawing stage is used to control the rotation of the turntable during the thawing stage and to call the corresponding power value in the dynamic power control sequence for microwave transmission according to the real-time turntable angle.

[0091] Preferably, the system further includes:

[0092] The power adjustment sequence update module is used to dynamically update the power adjustment coefficient and generate a new dynamic power adjustment sequence based on the real-time VSWR change trend during the thawing process.

[0093] It is understood that the system provided in this embodiment has functions or includes modules that can be used to execute the methods described in the above method embodiments. The specific implementation can be referred to the description of the above method embodiments, and for the sake of brevity, it will not be repeated here.

[0094] The present invention also provides an electronic device including a processor and a memory, the memory being used to store computer program code, the computer program code including computer instructions, wherein when the processor executes the computer instructions, the electronic device performs a method as described in any of the above possible implementations.

[0095] The present invention also provides a computer-readable storage medium storing a computer program, the computer program including program instructions that, when executed by a processor of an electronic device, cause the processor to perform a method as described in any of the above possible implementations.

[0096] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0097] Those skilled in the art will readily understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. Those skilled in the art will also readily understand that the various embodiments of the present invention have different focuses, and for the sake of convenience and brevity, the same or similar parts may not be repeated in different embodiments. Therefore, parts not described or not described in detail in one embodiment can be referred to in other embodiments.

Claims

1. A method for intelligent power control of a microwave oven for thawing, characterized by, The method comprises the following steps: when starting the thawing program at a first power, the turntable is controlled to rotate at a first rotating speed for one round, and the standing wave ratio in the microwave oven cavity is monitored in real time at a preset sampling frequency; a standing wave ratio sequence is generated according to the standing wave ratio values corresponding to each sampling point, and a power adjustment coefficient corresponding to each turntable angle is calculated; based on the power adjustment coefficient and the preset first power, a dynamic power control sequence corresponding to each turntable angle is generated; in the thawing stage, the turntable is controlled to rotate, and the microwave is emitted according to the power value corresponding to the real-time turntable angle in the dynamic power control sequence; the method further comprises: in a segmented interval in which the standing wave ratio average is less than a preset standing wave ratio threshold, the turntable is controlled to rotate at a second rotating speed lower than the first rotating speed; in a segmented interval in which the standing wave ratio average is greater than or equal to the preset standing wave ratio threshold, the turntable is controlled to rotate at a third rotating speed higher than the first rotating speed.

2. The intelligent microwave oven power control method for thawing according to claim 1, wherein, the method further comprises: the standing wave ratio sequence is divided into several segmented intervals, and the standing wave ratio average in each segmented interval is obtained to obtain segmented power adjustment coefficients; the segmented power adjustment coefficients satisfy the following formula: ， wherein denotes the power adjustment factor of the segment interval denotes the standing wave ratio of the segment interval denotes the power adjustment factor of the segment interval denotes the standing wave ratio of the segment interval 3. The intelligent microwave oven power control method for thawing according to claim 1, wherein, the second rotating speed and the third rotating speed are expressed as: ， In the formula, represents the real-time rotating speed of the th segment interval, represents the first rotating speed, is a rotating speed adjustment coefficient, represents the real-time rotating speed of the th segment interval, represents a preset standing wave ratio threshold.

4. The intelligent microwave oven power control method for thawing according to claim 1, wherein, before the step of when starting the thawing program at a first power, the turntable is controlled to rotate at a first rotating speed for one round, the method further comprises: obtaining storage information of the food to be thawed, the storage information comprising a freezing temperature curve and a storage time length; generating an initial temperature control curve corresponding to the thawing mode according to the storage information, and determining the first power and the first rotating speed.

5. The intelligent microwave oven power control method for thawing according to claim 1, wherein, after the step of and the microwave is emitted according to the power value corresponding to the real-time turntable angle in the dynamic power control sequence, the method further comprises: according to the change trend of the real-time standing wave ratio in the thawing process, the power adjustment coefficient is dynamically updated, and a new dynamic power adjustment sequence is generated.

6. An intelligent microwave oven power control system for thawing, characterized by, the system comprises: a standing wave ratio monitoring module, configured to control the turntable to rotate at a first rotating speed for one round when starting the thawing program at a first power, and monitor the standing wave ratio in the microwave oven cavity in real time at a preset sampling frequency; a power adjustment coefficient calculation module, configured to generate a standing wave ratio sequence according to the standing wave ratio values corresponding to each sampling point, and calculate a power adjustment coefficient corresponding to each turntable angle; a dynamic power control sequence generation module, configured to generate a dynamic power control sequence corresponding to each turntable angle based on the power adjustment coefficient and the preset first power; a thawing stage power control module, configured to control the turntable to rotate in the thawing stage, and emit the microwave according to the power value corresponding to the real-time turntable angle in the dynamic power control sequence; the system further comprises a rotating speed control module, configured to control the turntable to rotate at a second rotating speed lower than the first rotating speed in a segmented interval in which the standing wave ratio average is less than a preset standing wave ratio threshold, and control the turntable to rotate at a third rotating speed higher than the first rotating speed in a segmented interval in which the standing wave ratio average is greater than or equal to the preset standing wave ratio threshold.

7. The intelligent microwave oven power control system for thawing of claim 6, wherein, the system further comprises: a power adjustment sequence updating module, configured to dynamically update the power adjustment coefficient according to the change trend of the real-time standing wave ratio in the thawing process, and generate a new dynamic power adjustment sequence.

8. An electronic device, comprising: comprise: A processor and a memory for storing computer program code, the computer program code comprising computer instructions that, when executed by the processor, cause the electronic device to perform the method for power control of an intelligent microwave oven for thawing according to any one of claims 1 to 5.

9. A computer-readable storage medium, characterized in that, The computer readable storage medium has stored therein a computer program, the computer program comprising program instructions that, when executed by a processor of an electronic device, cause the processor to perform the method for power control of an intelligent microwave oven for thawing according to any one of claims 1 to 5.

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