Radio frequency device, control method thereof, program product, medium and refrigerator

Abstract

The invention discloses a radio frequency device and a control method thereof, a program product, a medium and a refrigerator, the radio frequency device comprises a power amplification device, and the method comprises the following steps: in the process that the radio frequency device unfreezes or heats a target object, scanning a target radio frequency meeting impedance matching of the radio frequency device, and controlling the power amplification device to output radio frequency power to a load according to the target radio frequency. According to the technical scheme, the real-time performance of tracking the radio frequency meeting the impedance matching of the radio frequency equipment can be improved in the process that the radio frequency equipment unfreezes or heats the target object.

Description

Technical Field

[0001] The present application belongs to the field of radio frequency device control technology, and in particular, relates to a radio frequency device and a control method thereof, a program product, a medium and a refrigerator. Background Art

[0002] Compared with traditional thawing methods, thawing objects (such as food) by radio frequency equipment has the advantages of high thawing efficiency, uniform thawing effect, convenient and hygienic use, etc. However, in the process of thawing or heating objects by radio frequency, the radio frequency equipment will have impedance mismatch due to the change of the object temperature, thereby affecting the working efficiency of the radio frequency equipment. Based on this, how to track the radio frequency frequency requirements that meet the impedance matching of the radio frequency equipment in real time during the process of the radio frequency equipment thawing or heating the target object is a technical problem that needs to be solved urgently. Summary of the invention

[0003] The embodiments of the present application provide a radio frequency device and a control method thereof, a program product, a medium and a refrigerator, thereby improving the real-time performance of tracking the radio frequency that satisfies the impedance matching of the radio frequency device during the process of the radio frequency device thawing or heating the target object.

[0004] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by the practice of the present application.

[0005] According to a first aspect of an embodiment of the present application, a method for controlling a radio frequency device is provided, wherein the radio frequency device includes a power amplifying device, and the method includes: during a process in which the radio frequency device thaws or heats a target object, scanning a target radio frequency frequency that satisfies the impedance matching of the radio frequency device, so as to control the power amplifying device to output radio frequency power to a load according to the target radio frequency frequency.

[0006] In some embodiments of the present application, based on the aforementioned scheme, the method further includes: when the RF device pauses thawing or heating the target object, scanning a target RF frequency that satisfies the impedance matching of the RF device, so that when the RF device is started to thaw or heat the target object, the power amplification device is controlled to output RF power to the load according to the target RF frequency.

[0007] In some embodiments of the present application, based on the aforementioned solution, the scanning of the target RF frequency that satisfies the impedance matching of the RF device includes: continuously scanning the target RF frequency that satisfies the impedance matching of the RF device.

[0008] In some embodiments of the present application, based on the aforementioned scheme, the continuous scanning of the target RF frequency that satisfies the impedance matching of the RF device includes: controlling the power amplifier device to output RF power to the load according to the current RF frequency, and determining a first reflection coefficient, wherein the reflection coefficient is used to characterize the degree of loss of the RF power; based on the current RF frequency, adjusting the RF frequency according to a target adjustment direction to obtain a first RF frequency, wherein the target adjustment direction is any one of increasing the RF frequency and decreasing the RF frequency; controlling the power amplifier device to output RF power to the load according to the first RF frequency, and determining a second reflection coefficient; if the second reflection coefficient is less than the first reflection coefficient, determining the first RF frequency as the target RF frequency that satisfies the impedance matching of the RF device, and returning to execute the step of controlling the power amplifier device to output RF power to the load according to the current RF frequency.

[0009] In some embodiments of the present application, based on the aforementioned scheme, the method also includes: if the second reflection coefficient is greater than or equal to the first reflection coefficient, on the basis of the current RF frequency, adjusting the RF frequency in an adjustment direction opposite to the target adjustment direction to obtain a second RF frequency; controlling the power amplification device to output RF power to the load at the second RF frequency, and determining a third reflection coefficient; if the third reflection coefficient is less than the first reflection coefficient, determining the second RF frequency as the target RF frequency that satisfies the impedance matching of the RF device, and returning to execute the step of controlling the power amplification device to output RF power to the load at the current RF frequency.

[0010] In some embodiments of the present application, based on the aforementioned scheme, the method also includes: if the third reflection coefficient is greater than or equal to the first reflection coefficient, the current RF frequency is determined as the target RF frequency that satisfies the impedance matching of the RF device, and returns to execute the step of controlling the power amplification device to output RF power to the load according to the current RF frequency.

[0011] In some embodiments of the present application, based on the aforementioned solution, the method further includes: after controlling the power amplification device to output radio frequency power to the load for a set period of time according to the radio frequency frequency, determining the reflection coefficient.

[0012] In some embodiments of the present application, based on the aforementioned solution, the adjusting the radio frequency includes: adjusting the radio frequency according to a preset frequency amplitude.

[0013] In some embodiments of the present application, based on the aforementioned scheme, the reflection coefficient is determined by the following steps: obtaining the reflected power output by the load to the power amplification device; determining the reflected power as the reflection coefficient; or calculating the ratio between the reflected power and the RF power, and determining the ratio as the reflection coefficient.

[0014] In some embodiments of the present application, based on the aforementioned solution, the radio frequency device further includes a frequency generating device, and the frequency generating device is used to modulate the target radio frequency for the power amplifying device.

[0015] According to a second aspect of an embodiment of the present application, a computer program product is provided, which includes computer instructions, which are stored in a computer-readable storage medium and are suitable for being read and executed by a processor, so that a computer device having the processor executes to implement the operations performed by the method described in any embodiment of the first aspect above.

[0016] According to a third aspect of an embodiment of the present application, a computer-readable storage medium is provided, in which at least one computer program instruction is stored. The at least one computer program instruction is loaded and executed by a processor to implement the operations performed by the method described in any embodiment of the first aspect above.

[0017] According to a fourth aspect of an embodiment of the present application, a radio frequency device is provided, comprising one or more processors and one or more memories, wherein at least one program code is stored in the one or more memories, and the at least one program code is loaded and executed by the one or more processors to implement a method as described in any one of the embodiments of the first aspect above.

[0018] According to a fifth aspect of an embodiment of the present application, a refrigerator is provided, comprising the radio frequency device as described in the fourth aspect above.

[0019] Based on the technical solution proposed in this application, the RF frequency that satisfies the impedance matching of the RF device can be tracked in real time during the process of the RF device thawing or heating the target object. Thus, the RF frequency can be adjusted and optimized to avoid impedance mismatch or damage to components of the RF device due to RF frequency mismatch, thereby enabling the RF device to minimize energy loss, ensure efficient transmission of RF power, improve reliability and consistency in the entire thawing or heating process, and improve the working efficiency of the RF device.

[0020] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0022] Figure 1 A system architecture diagram of a radio frequency device in one embodiment of the present application is shown;

[0023] Figure 2 A flow chart showing a method for controlling a radio frequency device in one embodiment of the present application is shown;

[0024] Figure 3 A graph showing the relationship between the radio frequency power, the reflected power, and the reflection coefficient and the radio frequency in one embodiment of the present application is shown;

[0025] Figure 4 A detailed flow chart of impedance matching control in one embodiment of the present application is shown;

[0026] Figure 5 A curve diagram showing changes in radio frequency power and reflected power during food thawing in one embodiment of the present application is shown;

[0027] Figure 6 A graph showing a change in radio frequency that satisfies impedance matching during food thawing in one embodiment of the present application is shown;

[0028] Figure 7 A flowchart of predicting the thawing time of a target object in one embodiment of the present application is shown;

[0029] Figure 8 A schematic structural diagram of an impedance matching control device for a radio frequency device in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0032] The block diagrams shown in the accompanying drawings are only functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices. It should also be noted that in the accompanying drawings, in order to ensure the simplicity of the drawings, some components in the drawings that do not affect the explanation of the technical solution of the present application are adaptively omitted.

[0033] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0034] It should be noted that the "multiple" mentioned in this article refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0035] It should also be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the objects used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those shown or described.

[0036] First, in order to enable those skilled in the art to better understand the technical solution proposed in this application, some existing RF device control solutions are introduced below. As is known to all, RF thawing or heating relies on the efficient transmission of RF energy to evenly thaw or heat the target object. However, in the process of thawing or heating the object by RF equipment, the dielectric constant of the target object (the thawed or heated object) will change with its temperature, which will cause the load impedance in the RF equipment to change, and then cause impedance mismatch in the RF equipment. Impedance mismatch will cause the RF energy to be partially reflected between the transmission line and the target object, reducing the energy that can be effectively transmitted to the target object. This energy loss not only reduces the thawing and heating efficiency, but also may cause uneven heating, resulting in overheating of some areas and insufficient thawing and heating of other areas.

[0037] In the existing scheme, a tuning loop is usually added to the RF device. When impedance mismatch occurs in the RF device, the impedance of the tuning loop is adjusted by adjusting the opening and closing states of each relay switch in the tuning loop, so as to impedance match the tuning loop with the load. However, this impedance matching method requires suspending thawing or heating each time impedance matching is performed (for example, reducing the output power of the RF device to a lower value), and then finding the impedance that satisfies the impedance matching by adjusting the opening and closing states of each relay switch in the tuning loop. After that, the thawing or heating is restarted. This process usually needs to be performed multiple times to find the impedance that satisfies the impedance matching, thereby increasing the operating time of the RF device during the impedance matching process and reducing the working efficiency of the RF device. At the same time, since the RF device will be in a mismatched state for a long time during the impedance matching process, the large reflected power generated by the load will increase the loss of components (specific capacitors, inductors, etc.) in the RF power amplifier circuit, reducing the service life of the RF device.

[0038] In addition, in the process of thawing the target object through the radio frequency device, the control of the thawing time is crucial to the control of the thawing effect. In the existing scheme, the user generally controls the thawing time by manual timing. However, this method is difficult to accurately grasp the time required for thawing different objects (such as different ingredients), which can easily lead to overheating and damage of the object or incomplete thawing.

[0039] In this case, the present application first proposes a radio frequency device and a control method thereof to solve the technical problems existing in the existing technical solutions.

[0040] Next, this application will combine Figure 1 The radio frequency device proposed in this application is described. Figure 1 , shows a system architecture diagram of a radio frequency device in one embodiment of the present application.

[0041] like Figure 1 As shown, the radio frequency device may include a control system 110 and a hardware system 120. The control system 110 may include a thawing or heating process control device 111, a power closed-loop control device 112, and an impedance matching control device 113; the hardware system 120 may include an adjustable power supply 121, a frequency generating device 122, a power amplifying device 123, and an object containing device 124. The control system 110 may be run through the hardware system 120, and the processed signal may be applied to the hardware system 120.

[0042] In the present application, the frequency generating device 122 can be used to modulate the radio frequency frequency; the power amplifying device 123 can be used to output radio frequency power to the load according to the radio frequency modulated by the frequency generating device 122; the impedance matching control device 113 may include one or more processors and one or more memories, and the one or more memories store at least one program code, and the at least one program code is loaded and executed by the one or more processors to implement the radio frequency device control method proposed in the present application.

[0043] Furthermore, in the present application, the adjustable power supply 121 can be used to output an adjustable voltage to the power amplifier 123 to output adjustable RF power; the power closed-loop control device 112 can be used to output a control signal to the adjustable power supply 121 and the power amplifier 123 to implement a closed-loop control function for the output RF power; the thawing or heating process control device 111 can be used to control the RF power curve and the RF power output time; the object holding device 124 can be used to hold a target object to be thawed or heated.

[0044] In one application of the present application, a user can place a target object to be thawed in an object holding device 124, and then start the radio frequency device to thaw the target object. During the thawing process, the power closed-loop control device 112 can control the adjustable power supply 121 to output a set voltage to the power amplifier 123, and then control the power amplifier 123 to output the corresponding radio frequency power to the load (i.e., the target object in the object holding device 124). It should be noted that the power amplifier 123 outputs radio frequency power to the load, which essentially outputs a radio frequency signal with a certain radio frequency frequency to the object holding device 124, and provides heat energy to the target object in the object holding device 124 through the radio frequency signal, thereby achieving thawing of the target object. As the temperature of the target object continues to rise during the thawing process, its dielectric constant is also changing, which in turn causes its impedance in the radio frequency power amplifier circuit to change. Based on the RF device control scheme proposed in this application, the impedance matching control device 113 can adjust the impedance between the power amplifier device 123 and the load in the RF power amplifier circuit by adjusting the RF frequency output by the frequency generating device 122 to the amplifier device 123, thereby achieving impedance matching of the RF device.

[0045] This application proposes an innovative radio frequency device, which can accurately achieve impedance matching of the radio frequency device by adjusting the radio frequency of the frequency generating device. The advantage is that during the impedance matching process, there is no need to pause the thawing operation, allowing the impedance matching and thawing process to be performed simultaneously, thereby avoiding additional algorithm steps. This not only simplifies the operation process, but also significantly saves the overall thawing or heating time, thereby being able to improve the working efficiency of the radio frequency device to a certain extent.

[0046] Next, the implementation details of the radio frequency device control method proposed in this application will be elaborated in detail:

[0047] Figure 2 A flow chart of a radio frequency device control method in an embodiment of the present application is shown. The radio frequency device may include a frequency generating device and a power amplifying device, wherein the frequency generating device may be used to modulate the radio frequency, and the power amplifying device may be used to output radio frequency power to a load according to the radio frequency modulated by the frequency generating device.

[0048] In the present application, the radio frequency device control method can be executed by a device having a computing and processing function, such as Figure 1 The impedance matching control device 113 shown is used to perform the above operation. Figure 2 As shown, the radio frequency device control method includes at least step 200, which is described in detail as follows:

[0049] Step 200 , when the radio frequency device thaws or heats the target object, impedance matching is performed on the radio frequency device by adjusting the radio frequency frequency of the frequency generating device.

[0050] In the present application, whether the RF device satisfies impedance matching can be reflected by a reflection coefficient used to characterize the degree of loss of the RF power. Specifically, the reflected power output by the load to the power amplifier can be determined as the reflection coefficient, or the ratio between the reflected power and the RF power output by the power amplifier to the load can be calculated, and the ratio can be determined as the reflection coefficient. The logarithm of the ratio between the reflected power and the RF power can also be calculated, and the logarithm can be determined as the reflection coefficient. This application does not make specific restrictions on this.

[0051] It is understandable that if the reflection coefficient is larger, the loss of the RF power is greater, that is, the impedance mismatch of the RF device is greater. Conversely, if the reflection coefficient is smaller, the impedance mismatch of the RF device is smaller.

[0052] In order to enable those skilled in the art to better understand the present application, the inventor provides a set of experimental data, please refer to Figure 3 , shows a graph showing the relationship between the RF power, reflected power, and reflection coefficient and the RF frequency in one embodiment of the present application.

[0053] like Figure 3 As shown, the relationship between RF power / reflection power / reflection coefficient (wherein the reflection coefficient is the ratio of the reflection power to the RF power) and RF frequency is shown, where the horizontal axis is the RF frequency, which ranges from 39.4MHz to 42.4MHz, and the vertical axis is the RF power / reflection power / reflection coefficient. Figure 3 It can be seen that the three curves in the figure are all continuous and smooth curves, and there is only one extreme point, that is, for food of the same weight and temperature, there is only one RF frequency that fully satisfies the impedance matching of the RF device.

[0054] It can be seen that in the present application, in the process of thawing or heating the target object by the radio frequency device, impedance matching can be achieved by adjusting the radio frequency frequency of the frequency generating device, and its core purpose is to ensure that the radio frequency device can operate efficiently when the target object is in different states. Since the absorption characteristics of the radio frequency energy of the target object in different states are different, the impedance of the radio frequency device changes. Based on the technical solution proposed in this application, there is no need to suspend the thawing or heating process. The impedance of the radio frequency device can be tracked in real time, so that the radio frequency frequency can be dynamically adjusted to meet the impedance matching of the radio frequency device, so that the radio frequency device always operates in an impedance matching state. This solution not only significantly improves the thawing or heating efficiency of the radio frequency device, but also enhances the reliability of the radio frequency device. By eliminating frequent pause and restart operations, the entire thawing or heating process becomes smoother and more efficient. In addition, the technical solution proposed in this application can also effectively reduce energy loss and ensure uniformity and stability during thawing or heating. In general, the technical solution proposed in this application can improve the working efficiency of the radio frequency device to a certain extent.

[0055] Specifically, in the present application, during the process of the RF device thawing or heating the target object, the target RF frequency that satisfies the impedance matching of the RF device can be scanned to control the power amplifier to output RF power to the load according to the target RF frequency. In addition, when the RF device pauses thawing or heating the target object, the target RF frequency that satisfies the impedance matching of the RF device can also be scanned to control the power amplifier to output RF power to the load according to the target RF frequency when the RF device is started to thaw or heat the target object. .

[0056] In the present application, during the process of thawing or heating the target object, in order to avoid local overheating in the target object due to possible uneven divergence of the RF signal, the output of the RF power can be temporarily stopped to reserve a certain amount of time for the temperature in the target object to be evenly distributed.

[0057] However, the inventor of the present application considers that during the period when the RF power stops being outputted, the physical state of the target object will still change, which will still cause the impedance to change. Based on this, in the present application, in order to ensure that the RF device can quickly return to the impedance matching working state when resuming the RF power output, when the RF device suspends thawing or heating the target object, by continuing to scan the target RF frequency that satisfies the impedance matching of the RF device, when the RF device is restarted to thaw or heat the target object, the power amplification device can be controlled to output RF power to the load according to the target RF frequency, even if the RF device can output RF power to the load according to the determined RF frequency that satisfies the impedance matching.

[0058] In the present application, the process of scanning the target RF frequency that satisfies the impedance matching of the RF device can be continuous. In this way, the RF frequency that satisfies the impedance matching of the RF device can be tracked in real time during the process of the RF device thawing or heating the target object. The RF frequency can be adjusted and optimized to avoid impedance mismatch or damage to components of the RF device due to RF frequency mismatch, so that the RF device can minimize energy loss and ensure efficient transmission of RF power, thereby improving the reliability and consistency of the entire thawing or heating process and improving the working efficiency of the RF device.

[0059] In the present application, the scanning of the target RF frequency that satisfies the impedance matching of the RF device may be to scan the target RF frequency within a preset frequency range centered on the current RF frequency, so as to control the power amplification device to output RF power to the load according to the target RF frequency; wherein the current RF frequency is the RF frequency that satisfies the impedance matching of the RF device last scanned, and the target RF frequency is the RF frequency that currently satisfies the impedance matching of the RF device.

[0060] In the present application, since the current RF frequency is the RF frequency determined in the last scanning process and satisfies the impedance matching of the RF device, and the target RF frequency is the latest RF frequency found in the current scanning process that can meet the impedance matching of the RF device, therefore, in the process of the RF device thawing or heating the target object, by scanning the target RF frequency within a preset frequency range centered on the current RF frequency, the target RF frequency that currently meets the impedance matching of the RF device can be efficiently and accurately scanned, so that the power amplification device can output RF power to the load according to the latest scanned RF frequency (i.e., the target RF frequency), ensuring that the RF device is always operating in an impedance matching state, thereby improving the accuracy of impedance matching of the RF device, thereby improving the working efficiency of the RF device (i.e., thawing efficiency or heating efficiency).

[0061] In addition, this solution not only improves the RF power transmission efficiency of RF devices, but also effectively reduces energy loss and other problems caused by impedance mismatch. By scanning and adjusting the RF frequency in real time, the RF device can quickly respond to load changes, ensuring that the RF device can maintain efficient and stable performance under different states of the target object.

[0062] In the present application, scanning the target radio frequency within a preset frequency range centered on the current radio frequency may be scanning the target radio frequency within the preset frequency range centered on the current radio frequency by an iterative optimization algorithm.

[0063] In this application, the target RF frequency is scanned by an iterative optimization algorithm, so that the RF device can dynamically adjust and optimize the RF frequency within a preset frequency range, flexibly respond to load changes, and ensure that the RF device can maintain efficient and stable thawing or heating performance in real time.

[0064] In addition, this scanning strategy based on iterative optimization algorithm can also enhance the robustness and reliability of RF equipment during the thawing or heating process of target objects, avoid the degradation of RF equipment performance due to RF frequency drift or other external factors, thereby providing a strong guarantee for the efficient operation of RF equipment and ensuring that RF equipment can perform at its best in different working environments.

[0065] Next, the present application will specifically explain the detailed scheme of impedance matching the radio frequency device by adjusting the radio frequency of the frequency generating device through some embodiments.

[0066] In some embodiments of the present application, the impedance matching of the radio frequency device by adjusting the radio frequency of the frequency generating device may be performed according to the following steps 211 to 214:

[0067] Step 211, controlling the power amplifying device to output radio frequency power to the load according to the current radio frequency frequency, and determining a first reflection coefficient, wherein the reflection coefficient is used to characterize the degree of loss of the radio frequency power.

[0068] Step 212: Based on the current RF frequency, adjust the RF frequency according to a target adjustment direction to obtain a first RF frequency, wherein the target adjustment direction is any one of increasing the RF frequency and decreasing the RF frequency.

[0069] Step 213: Control the power amplification device to output radio frequency power to the load according to the first radio frequency frequency, and determine a second reflection coefficient.

[0070] Step 214: impedance matching is performed on the radio frequency device based on a comparison result of the second reflection coefficient and the first reflection coefficient.

[0071] In the present application, if the target adjustment direction is to increase the RF frequency, the RF frequency is adjusted by increasing the RF frequency on the basis of the current RF frequency, thereby obtaining the first RF frequency. If the target adjustment direction is to decrease the RF frequency, the RF frequency is adjusted by decreasing the RF frequency on the basis of the current RF frequency, thereby obtaining the first RF frequency.

[0072] In the present application, since the current RF frequency (i.e., the RF frequency of the RF device in the current operation stage) is the RF frequency that satisfies the impedance matching of the RF device determined by the RF device in the last scanning process, but as the target object is continuously thawed or heated, the temperature of the target object continues to rise, and its dielectric constant is also changing, which in turn causes its impedance in the RF power amplifier circuit to change, which causes the current RF frequency to no longer be the RF frequency that is closest to satisfying the impedance matching of the RF device in the current operation stage. Based on this, by adjusting the RF frequency according to the target adjustment direction based on the current RF frequency to obtain a first RF frequency, and controlling the power amplifier device to output RF power to the load according to the first RF frequency to determine the second reflection coefficient, it can be determined whether the first RF frequency is the RF frequency that is closest to satisfying the impedance matching of the RF device in the current operation stage by comparing the second reflection coefficient with the first reflection coefficient.

[0073] Further, in this embodiment, the impedance matching of the radio frequency device based on the comparison result of the second reflection coefficient and the first reflection coefficient may also be performed according to the following step 215:

[0074] Step 215: if the second reflection coefficient is less than the first reflection coefficient, the first RF frequency is determined as a new current RF frequency that satisfies the impedance matching of the RF device, and impedance matching of the RF device is continued by adjusting the RF frequency of the frequency generating device.

[0075] In the present application, if the second reflection coefficient is less than the first reflection coefficient, it indicates that the first RF frequency reduces the degree of impedance mismatch of the RF device. Therefore, relative to the current RF frequency, the first RF frequency can be considered to be the RF frequency that is closest to satisfying the impedance matching of the RF device in the current operation stage. At this time, the first RF frequency can be determined as the new current RF frequency that satisfies the impedance matching of the RF device (that is, the scanned target RF frequency that satisfies the impedance matching of the RF device, and the power amplification device can be further controlled to output RF power to the load according to the target RF frequency).

[0076] Furthermore, after determining the first RF frequency as the new current RF frequency that satisfies the impedance matching of the RF device, the impedance matching of the RF device can continue to be performed by adjusting the RF frequency of the frequency generating device, that is, returning to execute the step of controlling the power amplifying device to output RF power to the load according to the current RF frequency.

[0077] Further, in this embodiment, the impedance matching of the radio frequency device based on the comparison result of the second reflection coefficient and the first reflection coefficient may be performed according to the following steps 216 to 218:

[0078] Step 216: If the second reflection coefficient is greater than or equal to the first reflection coefficient, based on the current RF frequency, adjust the RF frequency in an adjustment direction opposite to the target adjustment direction to obtain a second RF frequency.

[0079] Step 217: Control the power amplification device to output radio frequency power to the load according to the second radio frequency frequency, and determine a third reflection coefficient.

[0080] Step 218: impedance matching is performed on the radio frequency device based on a comparison result of the third reflection coefficient and the first reflection coefficient.

[0081] In the present application, if the second reflection coefficient is greater than or equal to the first reflection coefficient, it indicates that the first RF frequency further increases the degree of impedance mismatch of the RF device, and thus, relative to the current RF frequency, the first RF frequency cannot be considered as the RF frequency that is closest to satisfying the impedance matching of the RF device in the current operation stage. In this case, the second RF frequency can be obtained by adjusting the RF frequency in the opposite direction to the target adjustment direction based on the current RF frequency, and the power amplifier device can be controlled to output RF power to the load according to the second RF frequency to determine the third reflection coefficient. The comparison result of the third reflection coefficient and the first reflection coefficient can be used to determine whether the second RF frequency is the RF frequency that is closest to satisfying the impedance matching of the RF device in the current operation stage.

[0082] Further, in this embodiment, the impedance matching of the radio frequency device based on the comparison result of the third reflection coefficient and the first reflection coefficient may be performed according to the following step 219:

[0083] Step 219: If the third reflection coefficient is less than the first reflection coefficient, the second RF frequency is determined as a new current RF frequency that satisfies the impedance matching of the RF device, and impedance matching of the RF device is continued by adjusting the RF frequency of the frequency generating device.

[0084] In the present application, if the third reflection coefficient is less than the first reflection coefficient, it indicates that the second RF frequency reduces the degree of impedance mismatch of the RF device. Therefore, relative to the current RF frequency, the second RF frequency can be considered to be the RF frequency that is closest to satisfying the impedance matching of the RF device in the current operation stage. At this time, the second RF frequency can be determined as the new current RF frequency that satisfies the impedance matching of the RF device (that is, the scanned target RF frequency that satisfies the impedance matching of the RF device, and the power amplification device can be further controlled to output RF power to the load according to the target RF frequency).

[0085] Furthermore, after determining the second RF frequency as the new current RF frequency that satisfies the impedance matching of the RF device, the impedance matching of the RF device can continue to be performed by adjusting the RF frequency of the frequency generating device, that is, returning to execute the step of controlling the power amplifying device to output RF power to the load according to the current RF frequency.

[0086] Further, in this embodiment, the impedance matching of the radio frequency device based on the comparison result of the third reflection coefficient and the first reflection coefficient may also be performed according to the following step 220:

[0087] Step 220: If the third reflection coefficient is greater than or equal to the first reflection coefficient, it is determined that the current RF frequency satisfies the impedance matching of the RF device, and impedance matching of the RF device is continued by adjusting the RF frequency of the frequency generating device.

[0088] In the present application, if the third reflection coefficient is greater than or equal to the first reflection coefficient, it indicates that the second RF frequency further increases the degree of impedance mismatch of the RF device, and thus relative to the current RF frequency, the second RF frequency cannot be considered as the RF frequency that is closest to satisfying the impedance matching of the RF device at the current operating stage. In this case, it can be determined that the current RF frequency satisfies the impedance matching of the RF device, that is, it can be considered that the current RF frequency is still the RF frequency that is closest to satisfying the impedance matching of the RF device at the current operating stage (that is, after scanning to the target RF frequency that satisfies the impedance matching of the RF device, the power amplifier device can be further controlled to output RF power to the load according to the target RF frequency).

[0089] Furthermore, after determining that the current RF frequency satisfies the impedance matching of the RF device, the impedance matching of the RF device can continue to be performed by adjusting the RF frequency of the frequency generating device, that is, returning to execute the step of controlling the power amplification device to output RF power to the load according to the current RF frequency.

[0090] Based on the above embodiments, in general, the power amplifier device can be first controlled to output RF power to the load according to the current RF frequency, and the first reflection coefficient can be measured; based on the current RF frequency, the RF frequency is adjusted according to the target adjustment direction (i.e., increasing or decreasing the frequency) to obtain the first RF frequency, and the power amplifier device is controlled to output RF power to the load according to the first RF frequency, and the second reflection coefficient is measured; if the second reflection coefficient is less than the first reflection coefficient, the first RF frequency reduces the impedance mismatch, and it is determined to be the RF frequency of the RF device that is closest to satisfying the impedance matching of the RF device in the current operation stage (i.e., the RF frequency that satisfies the impedance matching); otherwise, the target adjustment direction is switched (i.e., reducing or increasing the frequency) to adjust the RF frequency, and the second RF frequency is obtained, and the power amplifier device is controlled to output RF power to the load according to the second RF frequency, and the third reflection coefficient is measured; if the third reflection coefficient is less than the first reflection coefficient, the second RF frequency reduces the impedance mismatch, and it is determined to be the RF frequency of the RF device that is closest to satisfying the impedance matching of the RF device in the current operation stage; otherwise, the current RF frequency is determined to be the RF frequency of the RF device that is closest to satisfying the impedance matching of the RF device in the current operation stage. The present application iteratively optimizes the RF frequency by repeating the above process, continuously adjusting the RF frequency and measuring the reflection coefficient to reduce the reflection coefficient until the RF frequency that is closest to meeting the impedance matching of the RF device is found. This can ensure that the RF device meets the impedance matching and maintains the best operating performance, thereby improving the working efficiency of the RF device.

[0091] In the present application, the RF frequency can be adjusted according to a preset frequency amplitude. It should be noted that the preset frequency amplitude can be set according to actual conditions, for example, it can be 1 Hz, 10 Hz, 100 Hz, or 1000 Hz. Specifically, the present application does not make too many restrictions on this.

[0092] In the present application, the preset frequency amplitude may be less than or equal to the preset amplitude threshold. The preset amplitude threshold may be set according to actual conditions, for example, it may be 10HZ, 100HZ, or 1001HZ. Specifically, the present application does not make too many restrictions on this. By limiting the preset frequency amplitude to be less than or equal to the preset amplitude threshold, small-step iteration of impedance matching can be achieved, so that the RF device can sense the RF frequency closest to satisfying impedance matching in real time at any stage of operation, so that the RF device can always operate in a state that satisfies impedance matching. At the same time, it can also save the time for impedance matching of the RF device and improve the working efficiency and reliability of the RF device.

[0093] In the present application, the reflection coefficient may be determined after the power amplifier is controlled to output the RF power to the load according to the RF frequency for a set time. The set time may be set according to the actual situation, for example, it may be 100ms, 500ms, or 1000ms. Specifically, the present application does not make too many restrictions on this. By waiting for the set time and then determining the reflection coefficient, the accuracy and reliability of the measurement results can be ensured. The main reason is that the RF device needs time to reach a new stable state, thermal effects may affect the impedance characteristics, frequency adjustment may cause transient response, and the equipment for measuring reverse power and RF power needs time to filter and average the signal, as well as to avoid the influence of short-term fluctuations on the measurement results. By waiting for the set time and then determining the reflection coefficient, it can be ensured that the temperature of the RF device is stable, the transient effect disappears, and the signal noise is reduced, thereby accurately reflecting the true reflection coefficient of the RF device, that is, the most realistic impedance state.

[0094] In the present application, at the same thawing time, the preset frequency amplitude can be positively correlated with the set duration. That is to say, at the same thawing time node, the longer the set duration, the larger the preset frequency amplitude used to adjust the RF frequency. The reason is that the longer the set duration, the greater the temperature change of the target object, resulting in a more significant change in its dielectric constant, which in turn causes a greater impedance change in the RF device. In this case, by increasing the preset frequency amplitude, the RF frequency can be more effectively adjusted to adapt to the impedance change of the target object, ensure the stability of the RF device operation, and improve the working efficiency and reliability of the RF device.

[0095] In the present application, the inventors found that when the radio frequency device thaws the target object (such as food to be thawed), the temperature of the target object gradually rises and its impedance continues to change. In the early stage of thawing, there may be ice crystals and liquid water in the target object. As the temperature rises, the ice crystals gradually melt into liquid water. This process will cause the dielectric constant of the target object to change significantly, thereby causing its impedance to change rapidly. In the later stage of thawing, the internal ice crystals are basically melted, and the temperature continues to rise, but the rate of change slows down. At this time, the change in the dielectric constant of the target object tends to be stable, causing its impedance to change more slowly.

[0096] Based on the above findings, in the present application, during the process of the radio frequency device thawing the target object, the preset frequency amplitude can be negatively correlated with the thawing time. That is to say, in the initial stage of thawing, since the impedance of the target object changes relatively fast, a larger preset frequency amplitude is required to adjust the radio frequency frequency to quickly respond to the impedance change and ensure the effective transmission of radio frequency energy. In the later stage of thawing, the impedance change speed of the target object slows down, so the preset frequency amplitude can be gradually reduced to avoid excessive adjustment of the radio frequency frequency, reduce unnecessary radio frequency frequency fluctuations, and maintain the stability of the operation of the radio frequency device. Furthermore, it can better adapt to the impedance changes of the target object at different thawing stages, optimize the transmission efficiency of radio frequency energy, and improve the working efficiency and reliability of the radio frequency device.

[0097] To enable those skilled in the art to better understand the present application, the following will be described with Figure 4 a specific embodiment for illustration.

[0098] Refer to Figure 4 , which shows the detailed flowchart of impedance matching control in an embodiment of the present application. Specifically, it includes the following steps 401 to step 413:

[0099] Step 401, the radio frequency device starts to work.

[0100] Step 402, obtain the reflection coefficient S0 of the radio frequency frequency M0.

[0101] Step 403, adjust the radio frequency frequency M1 = M0 - 1.

[0102] Step 404, wait for 500 ms.

[0103] Step 405, obtain the reflection coefficient S1 of the radio frequency frequency M1.

[0104] Step 406, determine whether S1 < S0? If so, execute step 411; if not, execute step 407.

[0105] Step 407, adjust the radio frequency frequency M1 = M0 + 1.

[0106] Step 408, wait for 500 ms.

[0107] Step 409, obtain the reflection coefficient S1 of the radio frequency frequency M1.

[0108] Step 410, determine whether S1 < S0? If so, execute step 411; if not, execute step 412

[0109] Step 411, define M0 = M1, and return to execute step 402.

[0110] Step 412, restore the radio frequency frequency to M0.

[0111] Step 413, wait for 500ms, and return to execute step 402.

[0112] Furthermore, the inventor of this application also provides a set of experimental data based on the above RF device control scheme, please refer to Figure 5 , shows a curve diagram of the changes in radio frequency power and reflected power during the food thawing process in one embodiment of the present application.

[0113] like Figure 5 As shown, the RF power and reflected power of the food to be thawed during the thawing process are plotted by executing the above RF device control scheme, where the horizontal axis is the thawing time, and the vertical axis is the RF power and reflected power. It can be seen that based on the RF device control scheme proposed in this application, the reflected power is kept at a low level, ensuring that the RF device is in good working condition throughout the thawing process. This not only saves time, but also effectively protects the hardware equipment and extends its service life.

[0114] In some other embodiments of the present application, the impedance matching of the radio frequency device by adjusting the radio frequency of the frequency generating device may also be performed according to the following step 221:

[0115] Step 221: If impedance mismatch of the RF device is detected, adjust the RF frequency to meet impedance matching of the RF device.

[0116] Further in the present application, the following steps 2211 to 2212 may also be performed:

[0117] Step 2211, determining a reflection coefficient during the process of the RF device thawing or heating the target object, wherein the reflection coefficient is used to characterize the degree of loss of the RF power.

[0118] Step 2212: If the reflection coefficient is greater than a preset reflection coefficient threshold, it is determined that the RF device impedance is mismatched.

[0119] In the present application, when the RF device thaws or heats the target object, it is first necessary to determine the reflection coefficient used to characterize the degree of RF power loss, and then compare the determined reflection coefficient with the preset reflection coefficient threshold. If the reflection coefficient is greater than the preset threshold, it is determined that the RF device has an impedance mismatch. In this way, the impedance mismatch of the RF device can be discovered and adjusted in time, thereby ensuring the efficient transmission of RF energy and optimizing the effect of the RF device on thawing or heating the target object.

[0120] In the present application, the step of adjusting the radio frequency may include performing the following steps 2213 to 2215:

[0121] Step 2213, reducing or increasing the RF frequency.

[0122] Step 2214, in the process of decreasing the RF frequency, if the reflection coefficient increases, increase the RF frequency; if the reflection coefficient decreases and is greater than the preset reflection coefficient threshold, continue to decrease the RF frequency until the reflection coefficient is less than or equal to the preset reflection coefficient threshold.

[0123] Step 2215, during the process of increasing the RF frequency, if the reflection coefficient increases, then decrease the RF frequency; if the reflection coefficient decreases and is greater than the preset reflection coefficient threshold, then continue to increase the RF frequency until the reflection coefficient is less than or equal to the preset reflection coefficient threshold.

[0124] In the present application, by adjusting the RF frequency down or up, an attempt can be made to find an RF frequency that reduces the reflection coefficient, so as to finally determine the RF frequency that satisfies the impedance matching of the RF device. In the process of adjusting the RF frequency down, the change of the reflection coefficient is monitored in real time. If the reflection coefficient increases, stop adjusting down and change to increasing the RF frequency. If the reflection coefficient decreases but is still greater than the preset threshold, continue to adjust the RF frequency down until the reflection coefficient is less than or equal to the preset threshold. In the process of increasing the RF frequency, the change of the reflection coefficient is monitored in real time. If the reflection coefficient increases, stop increasing and change to adjusting down the RF frequency. If the reflection coefficient decreases but is still greater than the preset threshold, continue to increase the RF frequency until the reflection coefficient is less than or equal to the preset threshold. Through the scheme in this embodiment, the reflection coefficient can be reduced, thereby reducing the loss of RF power, so that more RF energy can be effectively transmitted to the target object, and the thawing or heating efficiency of the target object is improved. The RF frequency can be automatically adjusted to achieve impedance matching of the RF device, reduce the risk of overheating or damage of the RF device due to impedance mismatch, and extend the service life of the device. In addition, more efficient energy transmission makes the thawing or heating process more uniform and faster, improves the thawing or heating effect on the target object, and improves the working efficiency and reliability of the radio frequency equipment.

[0125] Based on the above invention concept, the present application also proposes a radio frequency equipment control scheme to solve the technical problem in the prior art that it is difficult to accurately grasp the time required for thawing different objects (such as different food ingredients), which easily leads to overheating and damage of the objects or incomplete thawing. Specifically, the scheme may include the following steps 310 to 330:

[0126] Step 310 , while the RF device is defrosting the target object, impedance matching is performed on the RF device by adjusting the RF frequency.

[0127] Step 320: Obtain a target radio frequency that satisfies impedance matching of the radio frequency device at various times.

[0128] Step 330 : predicting the time when the target object is completely thawed based on the target RF frequency that satisfies the impedance matching of the RF device at various times.

[0129] In the present application, during the process of the RF device thawing the target object, the RF device is impedance matched by adjusting the RF frequency. For details, please refer to the above RF device control scheme, which will not be described in detail in the present application.

[0130] In the present application, during the process of the RF device thawing the target object, the target RF frequency that satisfies the impedance matching of the RF device at the current time can be periodically obtained. Specifically, by adjusting the RF frequency to achieve impedance matching, the RF device can maintain an operating state that satisfies impedance matching during the entire operation process, which enables the RF device to collect RF frequencies that satisfy impedance matching in real time and continuously during the thawing process, that is, to obtain the distribution characteristics and development trends of the RF frequencies that satisfy the RF device during the thawing process.

[0131] Based on the technical solution proposed in this application, by controlling the thawing process and the impedance matching process in parallel, it is possible to ensure that the RF device can achieve continuous output of RF power during the entire thawing process and keep the RF device in an impedance matching state, so that all parameters of the RF device during the thawing process (such as the target RF power that satisfies the impedance matching of the RF device) can be continuously collected. The technical solution proposed in this application avoids the problem of parameter isolation caused by the need for multiple impedance matching of the RF device in the same operating stage during the traditional RF thawing control process, thereby ensuring the integrity of the relevant parameter data, providing a strong data reference and basis for predicting the time when the target object is thawed, and thus improving the accuracy of the prediction of the time when the target object is thawed.

[0132] In the present application, the prediction of the time when the target object is thawed based on the target RF frequency that satisfies the impedance matching of the RF device at various times can be performed according to the following steps 331 to 332:

[0133] Step 331 , fitting the target RF frequency that satisfies the impedance matching of the RF device at various times to obtain a frequency variation curve, wherein the frequency variation curve is used to characterize the functional relationship between the target RF frequency and the thawing time.

[0134] Step 332: predicting the time when the target object is completely thawed based on the frequency change curve.

[0135] In order to enable those skilled in the art to better understand the frequency change curve, the inventor of the present application also provides a set of experimental data based on the above-mentioned radio frequency device control scheme, please refer to Figure 6 , shows a graph of radio frequency variation that satisfies impedance matching during food thawing in one embodiment of the present application.

[0136] like Figure 6 The figure shows the frequency change curve of the impedance matching of the RF device during the food thawing process, and the frequency change curve is continuous and smooth. As the thawing progresses, the temperature of the food gradually rises, causing its impedance to change continuously. Usually, the impedance changes faster in the early stage of thawing, and the change gradually slows down in the later stage of thawing. The impedance matching control module of the RF device can continuously and iteratively adjust the RF frequency according to the changing trends of the RF power and reflected power to adapt to the impedance changes of the food, thereby achieving the best impedance matching control. This dynamic adjustment mechanism ensures that the RF device can maintain efficient operation throughout the thawing process, optimizes the thawing effect, and helps protect the hardware equipment and extend its service life. Through this precise impedance matching, the RF device can better meet the needs of food at different thawing stages and ensure the stability and efficiency of the thawing process.

[0137] Based on the above findings, in the present application, the time when the target object is completely thawed can be predicted based on the frequency change curve.

[0138] In the present application, based on the above step 331, that is, fitting the target RF frequency that satisfies the impedance matching of the RF device at various times to obtain a frequency change curve, the following step 3311 can be performed:

[0139] Step 3311, performing a cubic fitting on the target RF frequency that satisfies the impedance matching of the RF device at each time to obtain a frequency variation curve.

[0140] In the present application, the target RF frequency that satisfies the impedance matching of the RF device at each time is subjected to cubic fitting to obtain a frequency change curve. The advantages are: on the one hand, the smoothness and continuity of the frequency change curve can be enhanced. The cubic fitting can generate a smooth and continuous curve, which is very beneficial for capturing the overall trend of RF frequency changes. It can accurately reflect the subtle fluctuations of RF frequency over time, making the RF frequency change characteristics during the thawing process more obvious, and can improve the accuracy of subsequent predictions of the target object's thawing completion time. On the other hand, the impact of noise can be reduced. In actual operation, the collected RF frequency may be interfered by various noises. The cubic fitting can effectively filter out these noises, provide a more accurate and stable frequency change curve, and improve the reliability of the data.

[0141] In the present application, based on the above step 332, the prediction of the time when the target object is thawed based on the frequency change curve can be performed according to the following steps 3321 to 3322:

[0142] Step 3321, determining a target thawing time based on the frequency change curve, wherein the target thawing time is the time when the ice-water phase transition occurs in the target object during the thawing process.

[0143] Step 3322: Based on the target thawing time, predict the time when the target object is completely thawed.

[0144] In the present application, by utilizing the correlation between the ice / water phase change process inside the food and the impedance matching frequency change curve, the time when the target object undergoes the ice-water phase change during the thawing process (i.e., the target thawing time) can be determined more accurately, so that the time when the target object is thawed can be further accurately predicted later. In addition, since the input basis for predicting the time when the target object is thawed is only the frequency change curve, there is no need to know parameters such as the weight and initial temperature of the food, which reduces the complexity and cost of the system and improves the user experience.

[0145] In one embodiment of the present application, based on the above step 3321, the determination of the target thawing time based on the frequency change curve may be performed according to the following steps 33211 to 33212:

[0146] Step 33211, determining a target feature point on the frequency change curve, wherein the tangent slope of the target feature point on the frequency change curve is greater than or equal to a preset slope threshold.

[0147] Step 33212, determine the target thawing time using the time corresponding to the target feature point.

[0148] In this embodiment, the frequency change curve of the impedance matching of the radio frequency device during the food thawing process is a continuous and smooth downward curve, and the dielectric constant of the food tends to be stable during the ice / water phase change process, resulting in a slow impedance change rate, showing a relatively gentle frequency change curve. During the time period of the food in the ice / water phase change, the tangent slope on the frequency change curve continues to approach 0 (i.e., continues to increase), but is always less than 0. Therefore, a target feature point whose tangent slope is greater than or equal to a preset slope threshold can be determined on the frequency change curve, so that the time corresponding to the target feature point can be determined as the target thawing time.

[0149] In the present application, the preset slope threshold can be set according to actual conditions, for example, it can be -0.05, or for example, it can be -0.08. Specifically, the present application does not make too many restrictions on this.

[0150] In another embodiment of the present application, based on the above step 3321, the determination of the target thawing time based on the frequency change curve may also be performed according to the following steps 33213 to 33214:

[0151] Step 33213, deriving the frequency change curve to obtain a derivative curve.

[0152] Step 33214, determine the inflection point on the derivative curve, and determine the target thawing time as the time corresponding to the inflection point.

[0153] Based on the technical solution proposed in this embodiment, the determination of the target thawing time can be simplified. By deriving the frequency change curve to obtain a derivative curve, it is easier to find the inflection point of the ice / water phase change of food during the thawing process, so that the time corresponding to the inflection point can be determined as the target thawing time.

[0154] In the present application, based on the above step 3322, the time when the target object is thawed is predicted based on the target thawing time, which can be performed according to the following step 33221:

[0155] Step 33221, compensating a set time period based on the target thawing time to determine the time when the target object is completely thawed.

[0156] It is understandable that, in general, when the food undergoes an ice / water phase transition during the thawing process, it means that the thawing process of the food is nearing completion. At this time, the injection time can be compensated based on the target thawing time according to the actual situation, and the obtained time is used as the predicted time for the target object to be thawed. The set time can be set according to the actual situation, for example, 1 minute, or 2 minutes. Specifically, this application does not make too many restrictions on this.

[0157] In order to make those skilled in the art better understand the present application, Figure 7 , described with a specific embodiment.

[0158] See also Figure 7 , shows a flow chart of predicting the thawing time of a target object in one embodiment of the present application. Specifically, it includes the following steps 701 to 706:

[0159] Step 701: Start the radio frequency device to perform a thawing operation.

[0160] Step 702 , while the RF device is defrosting the target object, periodically obtain a target RF frequency that satisfies impedance matching of the RF device at the current time.

[0161] Step 703: fitting a cubic curve equation (ie, a frequency variation curve) based on the target RF frequency that satisfies the impedance matching of the RF device at each time.

[0162] Step 704, solving the inflection point of the cubic curve equation.

[0163] Step 705: Does the thawing time reach the time T0 corresponding to the inflection point?

[0164] Step 706 , predicting the time when the target object is thawed, T=T0+N, where N is the set time.

[0165] Based on the technical solution proposed in this application, the time when the target object is thawed can be accurately predicted, so that in the process of thawing the target object by the radio frequency device, the time when the radio frequency device thaws the food can be accurately controlled, avoiding the situation where the food is overheated and damaged or the thawing is not completed, and enhancing the user experience.

[0166] Figure 8 A schematic structural diagram of an impedance matching control device for a radio frequency device in an embodiment of the present application is shown.

[0167] Based on the same inventive concept, the embodiment of the present application also provides a radio frequency device impedance matching control device. Figure 8 , shows a schematic diagram of the structure of the impedance matching control device of the radio frequency device in an embodiment of the present application, the impedance matching control device of the radio frequency device includes one or more memories 804, one or more processors 802 and at least one computer program (program code) stored in the memory 804 and executable on the processor 802, and the processor 802 implements the method described above when executing the computer program.

[0168] Among them, Figure 8 In the embodiment of the present invention, a bus architecture (represented by bus 800) is shown, which may include any number of interconnected buses and bridges, and bus 800 links various circuits including one or more processors represented by processor 802 and memory represented by memory 804. Bus 800 may also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. Bus interface 805 provides an interface between bus 800 and receiver 801 and transmitter 803. Receiver 801 and transmitter 803 may be the same element, namely a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 802 is responsible for managing bus 800 and general processing, while memory 804 may be used to store data used by processor 802 when performing operations.

[0169] Based on the same inventive concept, an embodiment of the present application provides a computer-readable storage medium, in which at least one computer program instruction is stored. The at least one computer program instruction is loaded and executed by a processor to implement the operations performed by the method described above.

[0170] Based on the same inventive concept, an embodiment of the present application provides a computer program product, which includes computer instructions, which are stored in a computer-readable storage medium and are suitable for being read and executed by a processor, so that a computer device with the processor executes to implement the operations performed by the radio frequency device control method as described above.

[0171] Based on the same inventive concept, the present application also proposes a refrigerator, which may include: Figure 8 An impedance matching control device for a radio frequency device is shown.

[0172] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored as one or more instructions or codes on a computer-readable medium or transmitted via a computer-readable medium. Other examples and implementations are within the scope and spirit of the present application and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hard wiring, or a combination of any of these. In addition, each functional unit may be integrated into a processing unit, each unit may exist physically separately, or two or more units may be integrated into one unit.

[0173] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0174] The units described as separate components may or may not be physically separated, and the components of the control device may or may not be physical units, that is, they may be located in one place or distributed in multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0175] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk and other media that can store program codes.

[0176] The above description is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. A radio frequency device control method, characterized in that: The radio frequency device includes a power amplification device, and the method includes: During the process of the RF device thawing or heating the target object, a target RF frequency that satisfies the impedance matching of the RF device is scanned to control the power amplification device to output RF power to the load according to the target RF frequency.

2. The method according to claim 1, characterized in that The method further comprises: When the RF device pauses thawing or heating the target object, a target RF frequency that satisfies the impedance matching of the RF device is scanned, so that when the RF device is started to thaw or heat the target object, the power amplification device is controlled to output RF power to the load according to the target RF frequency.

3. The method according to claim 2, characterized in that The scanning of the target radio frequency frequency that satisfies the impedance matching of the radio frequency device includes: The target radio frequency frequency that satisfies the impedance matching of the radio frequency device is continuously scanned.

4. The method according to claim 3, characterized in that The continuously scanning a target radio frequency frequency that satisfies the impedance matching of the radio frequency device includes: Controlling the power amplification device to output radio frequency power to the load according to the current radio frequency frequency, and determining a first reflection coefficient, wherein the reflection coefficient is used to characterize the degree of loss of the radio frequency power; Based on the current radio frequency, adjusting the radio frequency according to a target adjustment direction to obtain a first radio frequency, wherein the target adjustment direction is any one of increasing the radio frequency and decreasing the radio frequency; Controlling the power amplification device to output radio frequency power to the load according to the first radio frequency frequency, and determining a second reflection coefficient; If the second reflection coefficient is less than the first reflection coefficient, the first RF frequency is determined as the target RF frequency that satisfies the impedance matching of the RF device, and the step of controlling the power amplification device to output RF power to the load according to the current RF frequency is returned to be executed.

5. The method according to claim 4, characterized in that The method further comprises: If the second reflection coefficient is greater than or equal to the first reflection coefficient, based on the current radio frequency, adjusting the radio frequency in an adjustment direction opposite to the target adjustment direction to obtain a second radio frequency frequency; controlling the power amplifying device to output radio frequency power to the load according to the second radio frequency frequency, and determining a third reflection coefficient; If the third reflection coefficient is less than the first reflection coefficient, the second RF frequency is determined as the target RF frequency that satisfies the impedance matching of the RF device, and the step of controlling the power amplifying device to output RF power to the load according to the current RF frequency is returned to be executed.

6. The method according to claim 5, characterized in that The method further comprises: If the third reflection coefficient is greater than or equal to the first reflection coefficient, the current RF frequency is determined as the target RF frequency that satisfies the impedance matching of the RF device, and the step of controlling the power amplification device to output RF power to the load according to the current RF frequency is returned to execute.

7. The method according to any one of claims 4 to 6, characterized in that: The method further comprises: After controlling the power amplifying device to output radio frequency power to the load for a set period of time according to the radio frequency frequency, the reflection coefficient is determined.

8. The method according to any one of claims 4 to 6, characterized in that: The step of adjusting the radio frequency comprises: The radio frequency is adjusted according to a preset frequency amplitude.

9. The method according to any one of claims 4 to 6, characterized in that: Determine the reflection coefficient as follows: Acquiring reflected power output by the load to the power amplifying device; The reflected power is determined as the reflection coefficient; or a ratio between the reflected power and the radio frequency power is calculated, and the ratio is determined as the reflection coefficient.

10. The method according to claim 1, characterized in that The radio frequency device further comprises a frequency generating device, and the frequency generating device is used to modulate the target radio frequency for the power amplifying device.

11. A computer program product, characterized in that The computer program product includes computer instructions, which are stored in a computer-readable storage medium and are suitable for being read and executed by a processor, so that a computer device having the processor executes the method according to any one of claims 1 to 10.

12. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores at least one program code, and the at least one program code is loaded and executed by a processor to implement the operations performed by the method according to any one of claims 1 to 10.

13. A radio frequency device, characterized in that: The radio frequency device includes one or more processors and one or more memories, wherein at least one program code is stored in the one or more memories, and the at least one program code is loaded and executed by the one or more processors to implement the method according to any one of claims 1 to 10.

14. A refrigerator, characterized in that: The refrigerator includes the radio frequency device as claimed in claim 13.

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