Control method and device of radio frequency thawing equipment and radio frequency thawing equipment

Abstract

Embodiments of the present application provide a control method, device, storage medium, and radio frequency thawing device for radio frequency thawing equipment. The radio frequency thawing equipment includes a radio frequency power amplification circuit and a tuning circuit. The radio frequency power amplification circuit is used to output radio frequency power to the tuning circuit. The tuning circuit is used for impedance matching. The method includes: obtaining characteristic parameters of food in the radio frequency thawing equipment as target characteristic parameters, wherein the characteristic parameters are used to characterize the property state of the food; matching the target radio frequency power and initial thawing time for the food in the radio frequency thawing equipment according to the target characteristic parameters; and controlling the radio frequency thawing equipment to thaw the food at the target radio frequency power according to the initial thawing time. The technical solution of the embodiments of the present application can improve the accuracy of radio frequency thawing equipment in thawing food.

Description

Technical Field

[0001] The present application relates to the technical field of radio frequency thawing, and in particular to a control method, device, storage medium and radio frequency thawing device. Background Art

[0002] Currently, radio frequency thawing equipment (such as refrigerators with radio frequency thawing capabilities) typically applies a fixed amount of energy to each type of food to be thawed. While the existing technology is simple and convenient, due to the lack of time and energy management during the thawing process, the impact on the thawing of food may include over-thawing, resulting in food spoilage, insufficient thawing, affecting the user experience, or repeated thawing, resulting in energy waste. Therefore, improving the accuracy of radio frequency thawing equipment in thawing food is a technical problem that needs to be solved urgently. Summary of the Invention

[0003] The embodiments of the present application provide a control method, storage medium and radio frequency thawing device for a radio frequency thawing device, which can improve the accuracy of the radio frequency thawing device in thawing food to a certain extent, and at the same time improve the user experience of the radio frequency thawing device.

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

[0005] According to a first aspect of an embodiment of the present application, a control method for a radio frequency thawing device is provided, wherein the radio frequency thawing device includes a radio frequency power amplification circuit and a tuning circuit, wherein the radio frequency power amplification circuit is used to output radio frequency power to the tuning circuit, and the tuning circuit is used for impedance matching. The method includes: obtaining characteristic parameters of food in the radio frequency thawing device as target characteristic parameters, wherein the characteristic parameters are used to characterize the property state of the food; according to the target characteristic parameters, matching a target radio frequency power and an initial thawing time for the food in the radio frequency thawing device; and under the target radio frequency power, controlling the radio frequency thawing device to thaw the food according to the initial thawing time.

[0006] In some embodiments of the present application, based on the aforementioned scheme, the obtaining of characteristic parameters of food in the radio frequency thawing device includes: controlling the radio frequency thawing device to thaw the food according to a test radio frequency power and a test thawing time, so as to determine response data of the tuning circuit performing impedance matching within the test thawing time; determining the characteristic parameters of the food in the radio frequency thawing device based on the response data and multiple sets of pre-constructed sample data.

[0007] In some embodiments of the present application, based on the aforementioned scheme, the sample data includes sample response data and sample characteristic parameters corresponding one-to-one to the sample response data, and determining the characteristic parameters of the food in the radio frequency thawing device based on the response data and multiple sets of pre-constructed sample data includes: determining the response data of the tuning circuit performing impedance matching within multiple test thawing times to obtain multiple sets of response data; for each set of target response data, determining the matching degree between the target response data and each set of sample response data, the matching degree is used to characterize the degree of proximity between the target response data and the sample response data, and the target response data is any set of the multiple sets of response data; based on the matching degree of multiple sets of response data and the same sample response data, calculating the comprehensive matching degree of multiple sets of response data and the same sample response data; and determining the sample characteristic parameter corresponding to the sample response data with the highest comprehensive matching degree as the characteristic parameter of the food in the radio frequency thawing device.

[0008] In some embodiments of the present application, based on the aforementioned solution, the radio frequency thawing device includes at least one sensor, and obtaining characteristic parameters of food in the radio frequency thawing device includes: obtaining the characteristic parameters of food in the radio frequency thawing device through the at least one sensor.

[0009] In some embodiments of the present application, based on the aforementioned scheme, matching the target RF power and initial thawing time for the food in the RF thawing device according to the target characteristic parameters includes: obtaining predetermined calibration data, the calibration data being used to characterize the correspondence between RF power and thawing time, and the characteristic parameters of the food; based on the calibration data, matching the target RF power and initial thawing time for the food in the RF thawing device according to the target characteristic parameters.

[0010] In some embodiments of the present application, based on the aforementioned scheme, controlling the radio frequency thawing device to thaw the food according to the initial thawing time includes: obtaining a mismatch frequency of the tuning circuit at the beginning of the initial thawing time as the initial mismatch frequency, the mismatch frequency being used to characterize how frequently the tuning circuit is triggered to perform impedance matching; determining the mismatch frequency of the tuning circuit when the food undergoes a phase change as a reference mismatch frequency, and obtaining an actual elapsed time for the tuning circuit to change from the initial mismatch frequency to the reference mismatch frequency; determining a theoretical thawing time required for the radio frequency thawing device to thaw the food based on the initial mismatch frequency, the reference mismatch frequency, and the actual elapsed time; determining a difference between the initial thawing time and the actual elapsed time as an initial remaining thawing time, and determining a difference between the theoretical thawing time and the actual elapsed time as a theoretical remaining thawing time; if the theoretical remaining thawing time and the initial remaining thawing time are not approximately equal, controlling the radio frequency thawing device to thaw the food according to the theoretical remaining thawing time.

[0011] In some embodiments of the present application, based on the aforementioned solution, controlling the radio frequency thawing device to thaw the food according to the initial thawing time includes: detecting a reflection coefficient of the tuning circuit during thawing of the food by the radio frequency thawing device, the reflection coefficient being used to characterize the power consumption of the radio frequency power amplification circuit; if the reflection coefficient suddenly changes, obtaining an actual elapsed time of the radio frequency thawing device from the start of thawing to the sudden change in the reflection coefficient, an initial mismatch frequency of the tuning circuit at the beginning of the initial thawing time, and a reference mismatch frequency of the tuning circuit when the sudden change in the reflection coefficient occurs; determining a theoretical thawing time required for the radio frequency thawing device to thaw the food based on the initial mismatch frequency, the reference mismatch frequency, and the actual elapsed time; determining a difference between the initial thawing time and the actual elapsed time as an initial remaining thawing time, and determining a difference between the theoretical thawing time and the actual elapsed time as a theoretical remaining thawing time; and if the theoretical remaining thawing time and the initial remaining thawing time are not approximately equal, controlling the radio frequency thawing device to thaw the food according to the theoretical remaining thawing time.

[0012] In some embodiments of the present application, based on the aforementioned scheme, the detection of the reflection coefficient of the tuning circuit includes: obtaining the power value output by the RF power amplification circuit as a forward power value, and obtaining the power value output by the tuning circuit as a reverse power value; calculating the ratio between the reverse power value and the forward power value, and determining the ratio as the reflection coefficient.

[0013] In some embodiments of the present application, based on the aforementioned scheme, determining the theoretical thawing time required for the radio frequency thawing device to thaw the food based on the initial mismatch frequency and the reference mismatch frequency, as well as the actual consumed time, includes: calculating the ratio between the initial mismatch frequency and the reference mismatch frequency as a reference multiple; and determining the theoretical thawing time required for the radio frequency thawing device to thaw the food according to the reference multiple based on the actual consumed time.

[0014] According to a second aspect of an embodiment of the present application, a control device for a radio frequency thawing device is provided, wherein the radio frequency thawing device includes a radio frequency power amplification circuit and a tuning circuit, wherein the radio frequency power amplification circuit is used to output radio frequency power to the tuning circuit, and the tuning circuit is used for impedance matching. The device includes: an acquisition unit, used to acquire characteristic parameters of food in the radio frequency thawing device as target characteristic parameters, wherein the characteristic parameters are used to characterize the property state of the food; a matching unit, used to match target radio frequency power and initial thawing time for the food in the radio frequency thawing device according to the target characteristic parameters; and a thawing unit, used to control the radio frequency thawing device to thaw the food under the target radio frequency power and according to the initial thawing time.

[0015] According to a third aspect of an embodiment of the present application, a computer-readable storage medium is provided, characterized in that at least one program code is stored in the computer-readable storage medium, and the at least one program code is loaded and executed by a processor to implement the operations performed by the method described in any one of the first aspects above.

[0016] According to a fourth aspect of an embodiment of the present application, a radio frequency thawing 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 the operations performed by the method described in any one of the first aspects above.

[0017] The technical solution of the present application obtains characteristic parameters of the food in the radio frequency thawing device that are used to characterize the property state of the food as target characteristic parameters; then, based on the target characteristic parameters, matches the target radio frequency power and initial thawing time for the food in the radio frequency thawing device; and finally, controls the radio frequency thawing device to thaw the food under the target radio frequency power and according to the initial thawing time. Since the corresponding radio frequency power and the corresponding initial thawing time are matched to the food at the beginning of the food thawing process by obtaining the characteristic parameters of the food, different food ingredients correspond to different radio frequency powers and different initial thawing times. Compared with applying a fixed radio frequency power or using the same thawing time to different food ingredients, the technical solution proposed in the present application can more accurately provide matching thawing solutions for different food ingredients, that is, the radio frequency thawing device can strictly control the thawing time of the food ingredients and the radio frequency power required for the thawing process, thereby allowing the food ingredients to be thawed accurately. Based on this, the technical solution proposed in the present application can improve the accuracy of the radio frequency thawing device in thawing food ingredients and improve the user experience of the radio frequency thawing device.

[0018] 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

[0019] The accompanying drawings are incorporated into and constitute a part of the specification, illustrating embodiments consistent with the present application and, together with the specification, explaining the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can derive other drawings based on these drawings without inventive effort. In the drawings:

[0020] Figure 1 A schematic structural diagram of a radio frequency thawing device according to an embodiment of the present application is shown;

[0021] Figure 2 A flow chart showing a method for controlling a radio frequency thawing device according to an embodiment of the present application is shown;

[0022] Figure 3 A detailed flow chart of obtaining characteristic parameters of food in a radio frequency thawing device according to one embodiment of the present application is shown;

[0023] Figure 4 shows a circuit diagram of a tuning loop according to one embodiment of the present application;

[0024] Figure 5 A detailed flow chart of determining characteristic parameters of food in the radio frequency thawing device based on the response data and multiple sets of pre-constructed sample data according to one embodiment of the present application is shown;

[0025] Figure 6 shows a curve diagram of mismatch frequency variation according to one embodiment of the present application;

[0026] Figure 7 A block diagram of a control device for a radio frequency thawing device according to an embodiment of the present application is shown;

[0027] Figure 8 A schematic diagram of the structure of a computer system suitable for implementing the radio frequency thawing device of an embodiment of the present application is shown. DETAILED DESCRIPTION

[0028] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art.

[0029] 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 so as to provide a full understanding of the embodiments of the present application. However, it will be appreciated by those skilled in the art 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, implementations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0030] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically separate entities. That is, these functional entities may be implemented in software, in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0031] The flowcharts shown in the accompanying drawings are for illustrative purposes only and do not necessarily include all contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps may be decomposed, while others may be combined or partially combined. Therefore, the actual execution order may vary depending on the actual situation.

[0032] It should be noted that the term "plurality" used in this document refers to two or more. "And / or" describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A alone, A and B together, or B alone. The character " / " generally indicates an "or" relationship between the associated objects.

[0033] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described.

[0034] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0035] The following will describe some embodiments of the present application in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features therein may be combined with each other.

[0036] It should be noted that the radio frequency thawing device proposed in this application includes a radio frequency power amplification circuit and a tuning circuit. The radio frequency power amplification circuit is used to output radio frequency power to the tuning circuit, and the tuning circuit is used for impedance matching.

[0037] It should also be noted that the RF thawing device proposed in this application refers to a device with RF thawing functionality, such as a refrigerator with RF thawing functionality. It is understood that the control method for the RF thawing device proposed in this application can be applied to all devices with RF thawing functionality, including but not limited to refrigerators.

[0038] In order to make those skilled in the art better understand the radio frequency thawing device of the present application, the following will be combined with Figure 1 Provide explanation.

[0039] See also Figure 1 , shows a structural schematic diagram of a radio frequency thawing device according to an embodiment of the present application.

[0040] like Figure 1 The figure shows a possible RF thawing device, which includes a hardware system and a control system. The hardware system includes an adjustable power supply, which provides power to the entire RF thawing device and can adjust the output voltage; an RF power amplifier circuit, which outputs RF power to the tuning circuit and provides RF thawing energy to the food during the thawing process; a tuning circuit, which compensates for load impedance mismatch caused by changes in the food state; and a food cavity for accommodating the food to be thawed.

[0041] like Figure 1The control system of the RF thawing equipment shown includes power closed-loop control, which is used to sample forward power signals and reverse power signals, and output control signals to the adjustable power supply and RF power amplifier circuit to achieve precise output power closed-loop control function; automatic matching control, which is used to automatically collect forward power signals and reverse power signals to automatically send impedance matching instructions to the tuning circuit when impedance mismatch occurs; thawing process control, which is used to control the output power curve and output time according to the needs of food identification and thawing process; food identification, which is used to judge and identify the type of food, and determine the basic information of the food (such as type, quality, temperature, etc.).

[0042] See also Figure 2 , shows a flow chart of a control method for a radio frequency thawing device according to an embodiment of the present application, which specifically includes steps 110 to 130.

[0043] Step 110: Acquire characteristic parameters of food in the radio frequency thawing device as target characteristic parameters, wherein the characteristic parameters are used to characterize the property state of the food.

[0044] It is understandable that different ingredients have different attribute states. For example, different ingredients to be thawed have different ingredient types, ingredient pressures placed in the ingredient holding chamber, ingredient masses, initial thawing temperatures, ingredient volumes, ingredient shapes, ingredient images, etc. Therefore, in this embodiment, specific characteristic parameters for characterizing the attribute states of ingredients can be determined as target characteristic parameters based on different application scenarios, and this application does not limit this.

[0045] In some embodiments, the characteristic parameters of the food in the radio frequency thawing device can be obtained as follows: Figure 3 Follow the steps shown.

[0046] See also Figure 3 , shows a detailed flow chart of obtaining characteristic parameters of food in a radio frequency thawing device according to an embodiment of the present application, specifically including steps 111 to 112.

[0047] Step 111 : controlling the radio frequency thawing device to thaw the food according to a test radio frequency power and a test thawing time, so as to determine response data of the tuning circuit performing impedance matching within the test thawing time.

[0048] It should be noted that the test radio frequency power and the test thawing time are used to apply a certain radio frequency power to the food to be thawed for a certain time at the initial stage of thawing in order to obtain characteristic parameters of the food.

[0049] It can be understood that when the food is in the process of thawing, due to the output of RF power, the state of the food changes after absorbing the RF power, such as the dielectric constant of the food, the temperature of the food, etc., which causes the load of the tuning circuit to be mismatched. In order to maximize the utilization of the entire RF output power, the tuning circuit needs to perform impedance matching to improve the utilization rate of the RF power.

[0050] It should also be noted that the response data refers to state data generated by the tuning circuit in the RF thawing device during impedance matching within a certain test period. For example, this data may include the number of impedance matches performed within the test period (i.e., the number of mismatches in the tuning circuit); the closed state of the tuning circuit's relay switch at the beginning of the test period; the changing trend of the power output of the RF power amplifier circuit during the test period as the tuning circuit performs impedance matching; the closed state of the tuning circuit's relay switch at the end of the test period; or the changing trend of the reflection coefficient during the test period. Specifically, this application does not limit the specific state data generated by the tuning circuit during impedance matching that is used as response data.

[0051] In order to make those skilled in the art better understand the response data of this embodiment, the following will be combined with Figure 4 Provide explanation.

[0052] See also Figure 4 , shows a circuit diagram of a tuning loop according to an embodiment of the present application.

[0053] like Figure 4 As shown, a possible tuning and matching loop circuit diagram is shown, which includes a series energy storage element 1, a parallel energy storage element 2, an inductor 3, and a capacitor 4. In one embodiment, three groups of capacitors can be configured in the series energy storage element 1, and five groups of capacitors can be configured in the parallel energy storage element. Of course, the specific type and quantity of energy storage elements included in the series energy storage element 1 and the parallel energy storage element 2 can also be designed according to the specific scenario, and this application does not limit this.

[0054] In some embodiments, when the impedance of the capacitor 4 changes (ie, when the state of the food changes during the thawing process), it will cause the tuning circuit to have an impedance mismatch. In this case, the impedance mismatch can be adjusted as follows: Figure 4 The opening and closing states of the various relay switches shown are impedance matched, that is, the opening and closing states of different capacitors in the series energy storage element 1 and / or the parallel energy storage element 2 are adjusted to compensate for impedance mismatch so that the RF power output by the RF amplification circuit can be maximized.

[0055] It is understandable that Figure 4The tuning circuit shown will inevitably generate many different response data during the impedance matching process, such as the initial open and close state of the relay switch, the number of impedance matching times, etc.

[0056] Continue to see Figure 2 , step 112, determining characteristic parameters of the food in the radio frequency thawing device according to the response data and multiple sets of pre-constructed sample data.

[0057] It should be noted that the pre-constructed multiple sets of sample data refer to experimental data made by relevant personnel to more accurately realize the thawing function of the radio frequency thawing device, including sample response data and sample characteristic parameters corresponding to the sample response data.

[0058] It is understood that the sample response data refers to impedance matching response data of the tuning circuit obtained by testing a large number of different ingredients (including ingredients of different varieties, temperatures, and qualities) under a certain experimental RF power and a certain experimental time. The sample characteristic parameters corresponding to the sample response data can be sample characteristic parameters such as ingredient type, ingredient temperature, and ingredient quality.

[0059] For example, meat, 500g mass, and -10°C are used as sample characteristic parameters. The sample response data corresponding to these sample characteristic parameters may be that the number of mismatches of the tuning loop is 5.

[0060] In some embodiments, the characteristic parameters of the food in the radio frequency thawing device are determined based on the response data and the pre-constructed multiple sets of sample data, which can be as follows: Figure 5 Follow the steps shown.

[0061] See also Figure 5 , shows a detailed flow chart of determining the characteristic parameters of the food in the radio frequency thawing device based on the response data and multiple sets of pre-constructed sample data according to an embodiment of the present application, specifically including steps 1121 to 1124.

[0062] Step 1121 : determining response data of the tuning loop performing impedance matching during a plurality of test thawing times to obtain multiple groups of response data.

[0063] It should be noted that multiple test thawing times will correspond to multiple test RF powers applied to the food. However, the test RF power and test thawing time can be the same or different each time. This application does not limit this in detail.

[0064] In the multiple groups of response data in this embodiment, for example, the number of mismatches of the tuning circuit is used as the response data. If two thawing tests are performed on the food at the initial stage of thawing, two groups of data on the number of mismatches of the tuning circuit will be generated.

[0065] Step 1122 : for each set of target response data, determine the matching degree between the target response data and each set of sample response data, wherein the matching degree is used to characterize the closeness between the target response data and the sample response data. The target response data is any set of the multiple sets of response data.

[0066] In some implementations, a ratio threshold may be preset to determine the degree of matching, that is, the ratio of the target response data to the sample response data is used as the degree of matching.

[0067] In some implementations, a difference threshold may be preset to determine the matching degree, that is, the difference between the target response data and the sample response data is used as the matching degree.

[0068] In this embodiment, the method for determining the degree of matching between the target response data and each group of sample response data can be set according to different application scenarios, and the specific method is not limited in this application.

[0069] Step 1123 : Calculate the comprehensive matching degree between the plurality of groups of response data and the same sample response data based on the matching degree between the plurality of groups of response data and the same sample response data.

[0070] It is understood that if there are multiple groups of response data, each group of response data will be matched with each type of sample response data to obtain a matching degree. In this way, the same sample response data may correspond to multiple matching degrees.

[0071] In some implementations, the comprehensive matching degree may be determined by taking a weighted average of the matching degrees of each set of response data corresponding to the same sample response data.

[0072] In some implementations, the comprehensive matching degree may be determined by summing the matching degrees of each set of response data corresponding to the same sample response data.

[0073] In some embodiments, each set of response data may be sorted according to the degree of matching corresponding to the same sample response data, and the matching degree at the top of the sorting order is used as the comprehensive matching degree;

[0074] In this embodiment, the specific method of determining the comprehensive matching degree can be designed according to different application scenarios, and is not limited in this application.

[0075] Step 1124 : Determine the sample characteristic parameters corresponding to the sample response data with the highest comprehensive matching degree as the characteristic parameters of the food in the radio frequency thawing device.

[0076] It can be understood that after the determination in step 1123 , each sample response data will correspond to a comprehensive matching degree.

[0077] In some embodiments, a comprehensive matching degree threshold may be set, and the sample characteristic parameters corresponding to the sample response data whose comprehensive matching degree exceeds the comprehensive matching degree threshold are determined as the characteristic parameters of the food in the radio frequency thawing device.

[0078] In order to enable those skilled in the art to better understand this embodiment, the present embodiment will be described below in conjunction with Tables 1 to 3.

[0079]

[0080] Table 1

[0081]

[0082] Table 2

[0083]

[0084] Table 3

[0085] Table 1 shows the response data obtained for impedance matching of the tuning circuit within three test thawing times (i.e., three sets of response data were obtained), including two sets of sample response data, where the number of mismatches in the tuning circuit is used as the response data. As can be seen from Table 1, the target response data for the first test set was 1, the target response data for the second test set was 3, and the target response data for the third test set was 4. Sample 1 had 5 sample response data (sample 1 response data), and Sample 2 had 4 sample response data (sample 2 response data).

[0086] The degree of matching between the response data and the sample response data in Table 2 is determined by using the ratio of the response data to the sample response data.

[0087] The method for determining the comprehensive matching degree in Table 3 is to perform weighted averaging on the matching degree of each group of response data corresponding to the same sample response data to determine the comprehensive matching degree.

[0088] It can be understood that because the comprehensive matching degree of the response data with the response data of Sample 1 is 53%, which is less than the comprehensive matching degree of 67% with the response data of Sample 2, the sample characteristic parameters corresponding to Sample 2 can be determined as the characteristic parameters of the food in the RF thawing device. For example, if the sample characteristic parameters corresponding to Sample 2 are meat, 500g mass, and -10°C, then the parameters meat, 500g mass, and -10°C are determined as the characteristic parameters of the food in the RF thawing device.

[0089] In this embodiment, by acquiring impedance matching response data over multiple test thawing times, multiple sets of response data are obtained, thereby avoiding the potential for errors due to accidental factors that might arise from acquiring only one set of response data. Furthermore, this improves the accuracy of the RF thawing device in acquiring food characteristic parameters and the accuracy of its ability to match thawing solutions to food.

[0090] Continue to see Figure 2 In some embodiments, step 110, the step of obtaining characteristic parameters of food in the radio frequency thawing device may further include obtaining characteristic parameters of food in the radio frequency thawing device through at least one sensor.

[0091] It should be noted that the sensor may be a weight sensor for determining the mass of the food; a temperature sensor for determining the temperature of the food before thawing; or other sensors for determining the type and pressure of the food. Specifically, the type of sensor used and the characteristic parameters determined are not limited in this application.

[0092] Continue to see Figure 2 , step 120, matching the target radio frequency power and initial thawing time for the food in the radio frequency thawing device according to the target characteristic parameters.

[0093] In some embodiments, according to the target characteristic parameters, a specific implementation method of matching the target radio frequency power and initial thawing time for the food in the radio frequency thawing device can be performed according to the following steps 1 to 2.

[0094] Step 1: Obtain predetermined calibration data, wherein the calibration data is used to characterize the correspondence between radio frequency power and thawing time, and characteristic parameters of food ingredients.

[0095] Step 2: Based on the calibration data and the target characteristic parameters, matching the target radio frequency power and initial thawing time for the food in the radio frequency thawing device.

[0096] It should be noted that the target RF power can be a fixed value or a RF power that varies according to a certain curve. Of course, other methods can also be used to set the target RF power, and this application does not limit this. It is understood that if an RF power that varies according to a certain curve is used as the target RF power, the food can absorb different RF powers at different thawing stages. This can avoid wasting RF energy and improve the accuracy of the thawing plan matched by the RF thawing equipment for thawing the food.

[0097] In this embodiment, by matching the appropriate target RF power and initial thawing time for different ingredients (different in ingredient type, ingredient quality, ingredient temperature, etc.), the accuracy of the RF thawing device in thawing ingredients can be improved, thereby enhancing the user experience.

[0098] Continue to see Figure 2 , step 130, controlling the radio frequency thawing device to thaw the food at the target radio frequency power according to the initial thawing time.

[0099] In one embodiment, the specific implementation of controlling the radio frequency thawing device to thaw the food according to the initial thawing time can be performed according to the following steps 131 to 135.

[0100] Step 131 : Acquire the mismatch frequency of the tuning loop at the beginning of the initial thawing time as the initial mismatch frequency. The mismatch frequency is used to represent the frequency of the tuning loop being triggered to perform impedance matching.

[0101] It should be noted that the mismatch frequency can be interpreted as the number of times the tuning circuit experiences impedance mismatch (i.e., the number of impedance matching cycles) within a certain period of time. During the initial thawing period, most of the free water in the food exists as ice, which has a low specific heat capacity. When the food absorbs a certain amount of energy, it heats up faster than in later stages of thawing. Therefore, the state of the free water in the food changes more rapidly than in later stages of thawing, causing the tuning circuit to mismatch more frequently in the early stages than in later stages. Therefore, it can be understood that the initial mismatch frequency is the maximum mismatch frequency during the entire thawing process.

[0102] Step 132: determining a mismatch frequency of the tuning loop when the food undergoes a phase change as a reference mismatch frequency, and obtaining an actual elapsed time for the tuning loop to change from the initial mismatch frequency to the reference mismatch frequency.

[0103] It should be noted that, because the water content and specific heat capacity of different ingredients will affect the shape of the mismatch frequency variation curve, the mismatch frequency (i.e., the reference mismatch frequency) when different ingredients undergo phase change is not a fixed value.

[0104] In some embodiments, the initial mismatch frequency can be used to determine the reference mismatch frequency. For example, if the initial mismatch frequency is F1, F2 = F1 × 25% can be used as the reference mismatch frequency. It will be understood that in this embodiment, the mismatch frequency can be monitored in real time, and when the monitored mismatch frequency value is the reference mismatch frequency, the actual elapsed time is determined.

[0105] Step 133 : determining a theoretical thawing time required for the radio frequency thawing device to thaw the food based on the initial mismatch frequency, the reference mismatch frequency, and the actual consumed time.

[0106] In some embodiments, the theoretical thawing time may be determined according to steps 1331 to 1332 as follows.

[0107] Step 1331 : Calculate the ratio between the initial mismatch frequency and the reference mismatch frequency as a reference multiple.

[0108] Step 1332: Based on the actual consumed time, determine the theoretical thawing time required for the radio frequency thawing device to thaw the food according to the reference multiple.

[0109] For example, if the initial mismatch frequency is determined to be 6 and the reference mismatch frequency is 3, the ratio of the initial mismatch frequency to the reference mismatch frequency can be calculated to be 2. If the actual time taken for the food to thaw from the initial mismatch frequency to the reference mismatch frequency is 3 minutes, the theoretical thawing time can be determined to be 6 minutes.

[0110] In some embodiments, the theoretical thawing time can also be determined as follows: The theoretical thawing time required for the food is determined by multiplying the actual thawing time by an empirical value. For example, if the actual thawing time is determined to be 3 minutes and the empirical value is 3, the theoretical thawing time can be determined to be 9 minutes.

[0111] Step 134 : determining the difference between the initial thawing time and the actual consumed time as the initial remaining thawing time, and determining the difference between the theoretical thawing time and the actual consumed time as the theoretical remaining thawing time.

[0112] Step 135: If the theoretical remaining thawing time and the initial remaining thawing time are not approximately equal, controlling the radio frequency thawing device to thaw the food according to the theoretical remaining thawing time.

[0113] It should be noted that a preset difference can be used to determine whether the approximate equality is met. For example, the preset difference is set to 30s. If the theoretical remaining thawing time is 3 minutes and the initial remaining thawing time is 4 minutes, it can be determined that the theoretical remaining thawing time and the initial remaining thawing time do not meet the approximate equality.

[0114] It is also possible to determine whether they are approximately equal by rounding off. For example, if the theoretical remaining thawing time is 8 minutes and the initial remaining thawing time is 10 minutes, the theoretical remaining thawing time can be considered to be 10 minutes by rounding off, and it can be determined that the theoretical remaining thawing time and the initial remaining thawing time are approximately equal.

[0115] In this embodiment, the method for determining whether the theoretical remaining thawing time and the initial remaining thawing time are approximately equal can be determined according to different application scenarios, and this application does not limit this.

[0116] In order to make those skilled in the art better understand this embodiment, Figure 6 Provide explanation.

[0117] See also Figure 6 , shows a graph showing the variation of mismatch frequency according to an embodiment of the present application. Figure 6 As can be seen from the figure, the time difference between t1 and t2 is the actual time consumed. If the initial thawing time is determined to be t3 (i.e., the time from the start of thawing to the completion of thawing), the time difference between t3 and t2 is the initial remaining thawing time.

[0118] In this embodiment, the thawing time of the food is re-determined by utilizing the mismatched frequency of the tuning circuit during the thawing process, which is equivalent to a certain correction to the initial thawing time. To a certain extent, it can further improve the accuracy of the thawing equipment in thawing food.

[0119] Continue to see Figure 2 , step 130, controlling the radio frequency thawing device to thaw the food at the target radio frequency power according to the initial thawing time.

[0120] In another embodiment, the specific implementation of controlling the radio frequency thawing device to thaw the food according to the initial thawing time can be performed according to the following steps 136 to 140.

[0121] Step 136 : During the process of thawing food with the radio frequency thawing device, the reflection coefficient of the tuning circuit is detected. The reflection coefficient is used to represent the power consumption of the radio frequency power amplification circuit.

[0122] It should be noted that during the thawing process of food, the reflection coefficient should change in a steady trend. However, if the food itself contains a lot of ice cubes, many ice cubes will melt into water at a certain point in time and flow to a new position in the food cavity, which will destroy the original steady trend of the reflection coefficient.

[0123] In some implementations, the specific implementation of detecting the reflection coefficient of the tuning loop may be performed according to the following steps 1361 to 1362 .

[0124] Step 1361: Acquire the power value output by the radio frequency power amplification circuit as a forward power value, and acquire the power value output by the tuning circuit as a reverse power value.

[0125] It should be noted that the RF power output by the RF power amplifier circuit generally undergoes power loss, power effective utilization, and power reverse transmission back to the RF power amplifier circuit. It is understood that the lower the power loss and power reverse transmission back to the RF power amplifier circuit, the higher the RF power utilization.

[0126] It should also be noted that the power value output by the tuning circuit represents that a portion of the RF power output from the RF power amplifier circuit is not effectively utilized, but is reflected back to the RF power amplifier circuit by the tuning circuit. Therefore, the RF power value of this portion can be obtained as the power value output by the tuning circuit.

[0127] Step 1362: Calculate the ratio between the reverse power value and the forward power value, and determine the ratio as the reflection coefficient.

[0128] Step 137: If the reflection coefficient suddenly changes, obtain the actual time taken by the RF thawing device from the start of thawing to the sudden change in the reflection coefficient, the initial mismatch frequency of the tuning circuit at the beginning of the initial thawing time, and the reference mismatch frequency of the tuning circuit when the sudden change in the reflection coefficient occurs; the mismatch frequency is used to indicate how frequently the tuning circuit is triggered to perform impedance matching.

[0129] It should be noted that not all foods will necessarily experience a sudden change in reflection coefficient during the thawing process. If no sudden change in reflection coefficient is detected, the radio frequency thawing device can be controlled to thaw the food within the initial thawing time.

[0130] Step 138 : determining a theoretical thawing time required for the radio frequency thawing device to thaw the food based on the initial mismatch frequency, the reference mismatch frequency, and the actual consumed time.

[0131] In some embodiments, the theoretical thawing time may be determined by referring to the method shown in step 133 , which will not be described in detail herein.

[0132] Step 139: Determine the difference between the initial thawing time and the actual consumed time as the initial remaining thawing time, and determine the difference between the theoretical thawing time and the actual consumed time as the theoretical remaining thawing time.

[0133] Step 140: If the theoretical remaining thawing time and the initial remaining thawing time are not approximately equal, controlling the radio frequency thawing device to thaw the food according to the theoretical remaining thawing time.

[0134] In some embodiments, the method shown in step 135 may be referred to to determine whether the theoretical remaining thawing time and the initial remaining thawing time are approximately equal, which will not be described in detail in this application.

[0135] In this embodiment, by utilizing the sudden change in the reflection coefficient during the thawing process of the food, the thawing time of the food is re-determined, which is equivalent to a certain correction to the initial thawing time. To a certain extent, it can further improve the accuracy of the radio frequency thawing device in thawing food.

[0136] In the technical solutions provided by some embodiments of the present application, characteristic parameters of food in a radio frequency thawing device are obtained to characterize the property state of the food, which are used as target characteristic parameters; then, based on the target characteristic parameters, a target radio frequency power and initial thawing time are matched for the food in the radio frequency thawing device; and finally, the radio frequency thawing device is controlled to thaw the food at the target radio frequency power and according to the initial thawing time. Because the characteristic parameters of the food are obtained at the beginning of the thawing process, the corresponding radio frequency power and initial thawing time are matched to the food, so that different food corresponds to different radio frequency powers and different initial thawing times. Compared with applying a fixed radio frequency power or using the same thawing time to different food, the technical solution proposed in the present application can more accurately provide matching thawing solutions for different food. That is, the radio frequency thawing device can strictly control the thawing time of the food and the radio frequency power required for the thawing process, thereby ensuring that the food is thawed accurately. Based on this, the technical solution proposed in the present application can improve the accuracy of the radio frequency thawing device in thawing food and enhance the user experience of the radio frequency thawing device.

[0137] The following describes an embodiment of the device of the present application, which can be used to implement the control method of the radio frequency thawing device in the above embodiment of the present application. For details not disclosed in the embodiment of the device of the present application, please refer to the embodiment of the control method of the radio frequency thawing device in the above embodiment of the present application.

[0138] Figure 7 A block diagram of a control device of a radio frequency thawing device according to an embodiment of the present application is shown.

[0139] Reference Figure 7As shown, a control device 700 of a radio frequency thawing device according to an embodiment of the present application includes: an acquisition unit 701 , a matching unit 702 and a thawing unit 703 .

[0140] In which, the radio frequency thawing device includes a radio frequency power amplification circuit and a tuning circuit, the radio frequency power amplification circuit is used to output radio frequency power to the tuning circuit, and the tuning circuit is used for impedance matching. The acquisition unit 701 is used to obtain the characteristic parameters of the food in the radio frequency thawing device as the target characteristic parameters, and the characteristic parameters are used to characterize the attribute state of the food; the matching unit 702 is used to match the target radio frequency power and the initial thawing time for the food in the radio frequency thawing device according to the target characteristic parameters; the thawing unit 703 is used to control the radio frequency thawing device to thaw the food under the target radio frequency power and according to the initial thawing time.

[0141] In some embodiments of the present application, based on the aforementioned scheme, the acquisition unit 701 further includes: controlling the RF thawing device to thaw the food according to the test RF power and the test thawing time, so as to determine the response data of the tuning circuit performing impedance matching within the test thawing time; determining the characteristic parameters of the food in the RF thawing device based on the response data and multiple sets of pre-constructed sample data.

[0142] In some embodiments of the present application, based on the aforementioned scheme, the acquisition unit 701 further includes: the sample data includes sample response data and sample characteristic parameters corresponding one-to-one to the sample response data, and determining the characteristic parameters of the food in the radio frequency thawing device based on the response data and multiple sets of pre-constructed sample data includes: determining the response data of the tuning circuit performing impedance matching within multiple test thawing times to obtain multiple sets of response data; for each set of target response data, determining the matching degree between the target response data and each set of sample response data, the matching degree being used to characterize the degree of proximity between the target response data and the sample response data, the target response data being any set of the multiple sets of response data; calculating the comprehensive matching degree between the multiple sets of response data and the same sample response data based on the matching degrees between the multiple sets of response data and the same sample response data; and determining the sample characteristic parameters corresponding to the sample response data with the highest comprehensive matching degree as the characteristic parameters of the food in the radio frequency thawing device.

[0143] In some embodiments of the present application, based on the aforementioned solution, the acquisition unit 701 further includes: the radio frequency thawing device includes at least one sensor, and the acquiring of characteristic parameters of the food in the radio frequency thawing device includes: acquiring the characteristic parameters of the food in the radio frequency thawing device through the at least one sensor.

[0144] In some embodiments of the present application, based on the aforementioned scheme, the matching unit 702 further includes: obtaining predetermined calibration data, the calibration data being used to characterize the correspondence between the radio frequency power and the thawing time, and the characteristic parameters of the food; based on the calibration data, according to the target characteristic parameters, matching the target radio frequency power and the initial thawing time for the food in the radio frequency thawing device.

[0145] In some embodiments of the present application, based on the aforementioned scheme, the thawing unit 703 further includes: obtaining a mismatch frequency of the tuning circuit at the beginning of the initial thawing time as an initial mismatch frequency, the mismatch frequency being used to characterize how frequently the tuning circuit is triggered to perform impedance matching; determining the mismatch frequency of the tuning circuit when the food undergoes a phase change as a reference mismatch frequency, and obtaining an actual consumed time for the tuning circuit to change from the initial mismatch frequency to the reference mismatch frequency; determining a theoretical thawing time required for the radio frequency thawing device to thaw the food based on the initial mismatch frequency, the reference mismatch frequency, and the actual consumed time; determining a difference between the initial thawing time and the actual consumed time as an initial remaining thawing time, and determining a difference between the theoretical thawing time and the actual consumed time as a theoretical remaining thawing time; if the theoretical remaining thawing time and the initial remaining thawing time are not approximately equal, controlling the radio frequency thawing device to thaw the food according to the theoretical remaining thawing time.

[0146] In some embodiments of the present application, based on the aforementioned solution, the thawing unit 703 further includes: during the process of thawing the food by the radio frequency thawing device, detecting a reflection coefficient of the tuning circuit, the reflection coefficient being used to characterize the power consumption of the radio frequency power amplification circuit; if the reflection coefficient mutates, obtaining the actual time consumed by the radio frequency thawing device from the start of thawing to the mutation of the reflection coefficient, an initial mismatch frequency of the tuning circuit at the beginning of the initial thawing time, and a reference mismatch frequency of the tuning circuit when the reflection coefficient mutates; determining a theoretical thawing time required for the radio frequency thawing device to thaw the food based on the initial mismatch frequency, the reference mismatch frequency, and the actual thawing time; determining a difference between the initial thawing time and the actual thawing time as an initial remaining thawing time, and determining a difference between the theoretical thawing time and the actual thawing time as a theoretical remaining thawing time; if the theoretical remaining thawing time and the initial remaining thawing time are not approximately equal, controlling the radio frequency thawing device to thaw the food according to the theoretical remaining thawing time.

[0147] In some embodiments of the present application, based on the aforementioned scheme, the thawing unit 703 also includes: obtaining the power value output by the RF power amplification circuit as a forward power value, and obtaining the power value output by the tuning circuit as a reverse power value; calculating the ratio between the reverse power value and the forward power value, and determining the ratio as the reflection coefficient.

[0148] In some embodiments of the present application, based on the aforementioned scheme, the thawing unit 703 further includes: calculating the ratio between the initial mismatch frequency and the reference mismatch frequency as a reference multiple; based on the actual consumed time, determining the theoretical thawing time required for the radio frequency thawing device to thaw the food according to the reference multiple.

[0149] Figure 8 A schematic diagram of the structure of a computer system suitable for implementing the radio frequency thawing device of an embodiment of the present application is shown.

[0150] It should be noted that Figure 8 The computer system 800 of the radio frequency thawing device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0151] like Figure 8 As shown, computer system 800 includes a central processing unit (CPU) 801, which can perform various appropriate actions and processes, such as the methods described in the above embodiments, based on programs stored in read-only memory (ROM) 802 or programs loaded from storage 808 into random access memory (RAM) 803. RAM 803 also stores various programs and data required for system operation. CPU 801, ROM 802, and RAM 803 are interconnected via a bus 804. An input / output (I / O) interface 805 is also connected to bus 804.

[0152] The following components are connected to the I / O interface 805: an input section 806 including a keyboard, mouse, and the like; an output section 807 including devices such as a cathode ray tube (CRT), a liquid crystal display (LCD), and speakers; a storage section 808 including a hard disk; and a communication section 809 including a network interface card such as a LAN (Local Area Network) card or a modem. The communication section 809 performs communication processing via a network such as the Internet. A drive 810 is also connected to the I / O interface 805 as needed. Removable media 811, such as a magnetic disk, optical disk, magneto-optical disk, or semiconductor memory, is installed in the drive 810 as needed, so that computer programs read from the media can be installed in the storage section 808 as needed.

[0153] In particular, according to embodiments of the present application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of the present application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for executing the methods illustrated in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via the communication section 809 and / or installed from removable media 811. When executed by the central processing unit (CPU) 801, the computer program performs the various functions defined in the system of the present application.

[0154] It should be noted that the computer-readable medium described in the embodiments of this application may be a computer-readable signal medium or a computer-readable storage medium, or any combination thereof. A computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to, an electrical connection having one or more conductors, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), flash memory, optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this application, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In this application, a computer-readable signal medium may include a data signal transmitted in baseband or as part of a carrier wave, which carries computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium that can transmit, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer-readable medium may be transmitted using any suitable medium, including but not limited to wireless, wired, or any suitable combination thereof.

[0155] The flowcharts and block diagrams in the accompanying drawings illustrate the possible implementation architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present application. Among them, each box in the flowchart or block diagram can represent a module, program segment, or part of the code, and the above-mentioned module, program segment, or part of the code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart, can be implemented with a dedicated hardware-based system that performs the specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0156] The units involved in the embodiments described in this application may be implemented by software or hardware, and the units described may also be set in a processor. In some cases, the names of these units do not constitute limitations on the units themselves.

[0157] As another aspect, the present application further provides a computer program product or computer program, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the control method of the radio frequency thawing device described in the above embodiments.

[0158] As another aspect, the present application further provides a computer-readable medium, which may be included in the radiofrequency thawing device described in the above embodiments, or may exist independently without being incorporated into the radiofrequency thawing device. The computer-readable medium carries one or more programs, and when the one or more programs are executed by the radiofrequency thawing device, the radiofrequency thawing device implements the control method of the radiofrequency thawing device described in the above embodiments.

[0159] It should be noted that, although several modules or units of the device for action execution are mentioned in the above detailed description, this division is not mandatory. In fact, according to the embodiment of the application, the features and functions of two or more modules or units described above can be concretized in one module or unit. On the contrary, the features and functions of one module or unit described above can be further divided into multiple modules or units to be concretized.

[0160] Through the description of the above embodiments, it is easy for those skilled in the art to understand that the example embodiments described herein can be implemented by software or by combining software with necessary hardware. Therefore, the technical solution according to the embodiments of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, and includes a number of instructions to enable a computing device (which can be a personal computer, a server, a touch terminal, or a network device, etc.) to execute the method according to the embodiments of the present application.

[0161] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in this application. It should be understood that this application is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of this application is limited only by the appended claims.

Claims

1. A control method for a radio frequency thawing device, characterized in that: The radio frequency thawing device includes a radio frequency power amplification circuit and a tuning circuit, wherein the radio frequency power amplification circuit is used to output radio frequency power to the tuning circuit, and the tuning circuit is used for impedance matching. The method includes: Acquiring characteristic parameters of food in the radio frequency thawing device as target characteristic parameters, the characteristic parameters being used to characterize the property state of the food, the property state being at least one of the type of food to be thawed, the pressure of the food placed in the food receiving chamber, the weight of the food, the temperature of the food at the initial thawing stage, the volume of the food, the shape of the food, and an image of the food; According to the target characteristic parameters, matching the target radio frequency power and initial thawing time for the food in the radio frequency thawing device; Controlling the radio frequency thawing device to thaw the food at the target radio frequency power and according to the initial thawing time; The controlling the radio frequency thawing device to thaw the food according to the initial thawing time includes: obtaining a mismatch frequency of the tuning circuit at the beginning of the initial thawing time as the initial mismatch frequency, the mismatch frequency being used to characterize how frequently the tuning circuit is triggered to perform impedance matching; determining the mismatch frequency of the tuning circuit when the food undergoes a phase change as a reference mismatch frequency, and obtaining an actual elapsed time for the tuning circuit to change from the initial mismatch frequency to the reference mismatch frequency; determining a theoretical thawing time required for the radio frequency thawing device to thaw the food based on the initial mismatch frequency, the reference mismatch frequency, and the actual elapsed time; determining a difference between the initial thawing time and the actual elapsed time as an initial remaining thawing time, and determining a difference between the theoretical thawing time and the actual elapsed time as a theoretical remaining thawing time; if the absolute value of the difference between the theoretical remaining thawing time and the initial remaining thawing time is greater than a preset difference, controlling the radio frequency thawing device to thaw the food according to the theoretical remaining thawing time; or Controlling the radio frequency thawing device to thaw the food according to the initial thawing time includes: detecting a reflection coefficient of the tuning circuit during thawing of the food by the radio frequency thawing device, the reflection coefficient being used to represent the power consumption of the radio frequency power amplification circuit; if the reflection coefficient mutates, obtaining an actual elapsed time of the radio frequency thawing device from the start of thawing to the mutation of the reflection coefficient, an initial mismatch frequency of the tuning circuit at the beginning of the initial thawing time, and a reference mismatch frequency of the tuning circuit when the mutation occurs; determining a theoretical thawing time required for the radio frequency thawing device to thaw the food based on the initial mismatch frequency, the reference mismatch frequency, and the actual elapsed time; determining a difference between the initial thawing time and the actual elapsed time as an initial remaining thawing time, and determining a difference between the theoretical thawing time and the actual elapsed time as a theoretical remaining thawing time; and if the absolute value of the difference between the theoretical remaining thawing time and the initial remaining thawing time is greater than a preset difference, controlling the radio frequency thawing device to thaw the food according to the theoretical remaining thawing time.

2. The method according to claim 1, characterized in that The step of obtaining characteristic parameters of food in the radio frequency thawing device includes: Controlling the radio frequency thawing device to thaw the food according to the test radio frequency power and the test thawing time, so as to determine the response data of the tuning circuit for impedance matching within the test thawing time; The characteristic parameters of the food in the radio frequency thawing device are determined according to the response data and a plurality of sets of pre-constructed sample data.

3. The method according to claim 2, characterized in that The sample data includes sample response data and sample characteristic parameters corresponding to the sample response data. Determining the characteristic parameters of the food in the radio frequency thawing device based on the response data and multiple sets of pre-constructed sample data includes: determining response data of the tuning loop performing impedance matching during a plurality of the test thawing times to obtain multiple groups of response data; For each set of target response data, determining a degree of matching between the target response data and each set of sample response data, wherein the degree of matching is used to characterize the closeness between the target response data and the sample response data, the target response data being any one of the multiple sets of response data; Calculating the comprehensive matching degree between the plurality of groups of response data and the same sample response data based on the matching degree between the plurality of groups of response data and the same sample response data; The sample characteristic parameters corresponding to the sample response data with the highest comprehensive matching degree are determined as the characteristic parameters of the food in the radio frequency thawing device.

4. The method according to claim 1, wherein The radio frequency thawing device includes at least one sensor, and the step of obtaining characteristic parameters of food in the radio frequency thawing device includes: The characteristic parameters of the food in the radio frequency thawing device are obtained through the at least one sensor.

5. The method according to claim 1, wherein The step of matching target radio frequency power and initial thawing time for food in the radio frequency thawing device according to the target characteristic parameters includes: Obtaining predetermined calibration data, wherein the calibration data is used to characterize the correspondence between radio frequency power and thawing time, and characteristic parameters of food ingredients; Based on the calibration data and in accordance with the target characteristic parameters, a target radio frequency power and an initial thawing time are matched for the food in the radio frequency thawing device.

6. The method according to claim 1, characterized in that The detecting the reflection coefficient of the tuning loop includes: Obtaining a power value output by the radio frequency power amplification circuit as a forward power value, and obtaining a power value output by the tuning circuit as a reverse power value; A ratio between the reverse power value and the forward power value is calculated, and the ratio is determined as the reflection coefficient.

7. The method according to claim 1, characterized in that The determining, based on the initial mismatch frequency, the reference mismatch frequency, and the actual consumed time, a theoretical thawing time required for the radio frequency thawing device to thaw the food includes: Calculating a ratio between the initial mismatch frequency and the reference mismatch frequency as a reference multiple; Based on the actual consumed time, a theoretical thawing time required for the radio frequency thawing device to thaw the food is determined according to the reference multiple.

8. A control device for radio frequency thawing equipment, characterized in that: The radio frequency thawing device includes a radio frequency power amplification circuit and a tuning circuit, wherein the radio frequency power amplification circuit is used to output radio frequency power to the tuning circuit, and the tuning circuit is used for impedance matching. The device includes: an acquisition unit, configured to acquire characteristic parameters of food in the radio frequency thawing device as target characteristic parameters, wherein the characteristic parameters are used to characterize a property state of the food, wherein the property state is at least one of the type of food to be thawed, the pressure of the food in the food receiving chamber, the weight of the food, the temperature of the food at the initial thawing stage, the volume of the food, the shape of the food, and an image of the food; a matching unit, configured to match a target radio frequency power and an initial thawing time for the food in the radio frequency thawing device according to the target characteristic parameters; a thawing unit, configured to control the radio frequency thawing device to thaw the food at the target radio frequency power and according to the initial thawing time; The thawing unit is configured to: obtain a mismatch frequency of the tuning circuit at the beginning of the initial thawing time as the initial mismatch frequency, the mismatch frequency being used to characterize how frequently the tuning circuit is triggered to perform impedance matching; determine the mismatch frequency of the tuning circuit when the food undergoes a phase change as a reference mismatch frequency, and obtain the actual time consumed by the tuning circuit for changing from the initial mismatch frequency to the reference mismatch frequency; determine a theoretical thawing time required for the radio frequency thawing device to thaw the food based on the initial mismatch frequency, the reference mismatch frequency, and the actual time consumed; determine the difference between the initial thawing time and the actual time consumed as the initial remaining thawing time, and determine the difference between the theoretical thawing time and the actual time consumed as the theoretical remaining thawing time; if the absolute value of the difference between the theoretical remaining thawing time and the initial remaining thawing time is greater than a preset difference, control the radio frequency thawing device to thaw the food according to the theoretical remaining thawing time; or, The thawing unit is configured to: detect a reflection coefficient of the tuning circuit during thawing of food by the radio frequency thawing device, the reflection coefficient being used to characterize the power consumption of the radio frequency power amplification circuit; if a sudden change occurs in the reflection coefficient, obtain the actual time consumed by the radio frequency thawing device from the start of thawing to the sudden change in the reflection coefficient, an initial mismatch frequency of the tuning circuit at the beginning of the initial thawing time, and a reference mismatch frequency of the tuning circuit when the sudden change occurs in the reflection coefficient; determine a theoretical thawing time required for the radio frequency thawing device to thaw the food based on the initial mismatch frequency, the reference mismatch frequency, and the actual consumed time; determine a difference between the initial thawing time and the actual consumed time as an initial remaining thawing time, and determine a difference between the theoretical thawing time and the actual consumed time as a theoretical remaining thawing time; and if the absolute value of the difference between the theoretical remaining thawing time and the initial remaining thawing time is greater than a preset difference, control the radio frequency thawing device to thaw the food according to the theoretical remaining thawing time.

9. 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 7.

10. A radio frequency thawing device, characterized in that: The invention comprises a memory and one or more programs, wherein the one or more programs are stored in the memory and configured to be executed by one or more processors, and the one or more programs include instructions for performing the method according to any one of claims 1 to 7.

Images