Thawing device and thawing control method

Abstract

The application discloses a thawing device and a thawing control method, and belongs to the technical field of thawing. The thawing device comprises a double-radio-frequency energy generator, a double-radio-frequency energy generator for emitting double-frequency electromagnetic waves to a thawing bin; a double-frequency bioimpedance sensor for detecting impedance ratio information and phase angle information indicating the thawing degree of food in the thawing bin; and a controller connected with the double-radio-frequency energy sensor and the double-frequency bioimpedance sensor, for controlling the double-radio-frequency energy generator based on the impedance ratio information and the phase angle information. The thawing device of the application can be installed in a smart refrigerator. The thawing device uses a double-frequency impedance sensor to monitor the intracellular and extracellular liquid phase change state of food to be thawed, and uses a double-radio-frequency energy generator to cooperatively heat the inside and surface of the food based on double-frequency radio frequency. The thawing degree is intelligently determined, so that the ratio of the double-frequency radio frequency is intelligently adjusted, the thawing is completely ensured, and the food is not excessively thawed.

Description

Technical Field

[0001] This application relates to the field of thawing technology, and in particular to thawing devices and thawing control methods. Background Technology

[0002] There are two main methods for thawing food in related technologies. The first method uses a fan to thaw, and the completion of thawing is determined by the thawing time and temperature. The second method uses heating to thaw, and the completion of thawing is also determined by the thawing time and temperature. Both of these methods have problems with not being able to accurately determine the degree of thawing in a timely manner, and with imbalances in heat conduction. For example, there may be technical problems such as the surface being thawed but the inside still being frozen, resulting in incomplete thawing, or over-thawing, which damages the surface cells of the food and affects its taste. Summary of the Invention

[0003] This application provides a defrosting device and a defrosting control method, which can solve at least one of the aforementioned technical problems.

[0004] According to one aspect of the embodiments of this application, a defrosting apparatus is provided, including a defrosting chamber, and further comprising:

[0005] A dual-frequency energy generator, which is used to transmit dual-frequency electromagnetic waves to the thawing chamber;

[0006] A dual-frequency bioimpedance sensor is used to detect impedance ratio information and phase angle information that indicate the degree of thawing of food in the thawing chamber;

[0007] A controller, which is connected to both the dual-RF energy sensor and the dual-frequency bioimpedance sensor, is used to control the dual-RF energy generator based on the impedance ratio information and the phase angle information.

[0008] In one exemplary embodiment, the dual-frequency bioimpedance sensor includes: a detection electrode and an excitation electrode;

[0009] The dual-frequency bioimpedance sensor is located at the bottom of the thawing chamber. The detection electrode extends upward from the bottom of the thawing chamber and is exposed in the accommodating space of the thawing chamber, which is used to place food. The excitation electrode extends upward from the bottom of the thawing chamber and is exposed in the accommodating space of the thawing chamber.

[0010] The dual radio frequency energy generator is located at the top of the thawing chamber.

[0011] According to another aspect of the embodiments of this application, a defrosting control method is provided, the method being applied to a controller of the aforementioned defrosting device, the method comprising:

[0012] When food to be thawed is placed in the thawing chamber, a dual-frequency bioimpedance sensor is triggered to detect impedance ratio and phase angle information that indicate the degree of thawing of the food in the thawing chamber.

[0013] Based on the impedance ratio information and the phase angle information, thawing indication information is determined, wherein the thawing indication information characterizes the degree of thawing;

[0014] If the thawing information indicates that thawing has not been completed, power ratio information is determined based on the thawing information, wherein the power ratio information indicates the energy ratio relationship between low-frequency electromagnetic waves and high-frequency electromagnetic waves.

[0015] Based on the power ratio information, the dual radio frequency energy generator is controlled to defrost the food.

[0016] In one exemplary embodiment, the dual-frequency bioimpedance sensor is triggered to perform the following operations:

[0017] The extracellular fluid resistance Rec of food was detected at low frequency, and the total cellular fluid resistance Rinfinity was detected at high frequency.

[0018] Based on the extracellular fluid resistance Rec and the total cellular fluid resistance Rinfinity, and using the formula... Calculate the overall impedance, where α represents the distribution coefficient indicating cell structure and f indicates the detection frequency of the dual-frequency bioimpedance sensor;

[0019] Use formula Calculate impedance ratio information;

[0020] The initial phase angle θraw is calculated using the formula θraw=arctan(Q / I)×(180 / π), where Q and I represent the real part and imaginary part of the overall impedance, respectively; the initial phase angle θraw is part of the phase angle information.

[0021] In one exemplary embodiment, the dual-frequency bioimpedance sensor includes a thermistor for acquiring the surface temperature T of a detection electrode, and the method includes triggering the dual-frequency bioimpedance sensor to perform the following operation: based on the formula Calculate the corrected phase angle θ corrected , where λ and These are all correction parameters, the phase angle θ corrected This belongs to the phase angle information.

[0022] In one exemplary embodiment, determining the defrosting indication information based on the impedance ratio information and the phase angle information includes:

[0023] The first indication parameter is determined based on the impedance ratio information;

[0024] The second indication parameter is determined based on the phase angle information;

[0025] The sum of the first indication parameter and the second indication parameter is determined as the thawing indication information.

[0026] In one exemplary embodiment, the defrost indication information is a number greater than 0 and less than 1, and the method further includes:

[0027] If the thawing indication information is less than a preset threshold, it is determined that thawing has not yet been completed;

[0028] If the thawing indication information is greater than or equal to the preset threshold, the thawing is determined to be complete.

[0029] In one exemplary implementation, determining the power ratio information based on the defrosting indication information includes:

[0030] Based on formula Determine the power ratio information 'a', where Q is the defrosting indication information, and α, β, and γ are all adjustable parameters.

[0031] In one exemplary embodiment, the method further includes:

[0032] When the thawing information indicates that thawing is complete, the power of the dual radio frequency energy generator is reduced to a preset power threshold, which is used to maintain the thawing state of the food.

[0033] According to another aspect of the embodiments of this application, a computer-readable storage medium is provided, wherein at least one instruction, at least one program, code set, or instruction set is stored in the storage medium, wherein the at least one instruction, the at least one program, the code set, or the instruction set is loaded and executed by a processor to implement the unfreezing control method as described above.

[0034] The technical solution provided in this application can bring the following beneficial effects:

[0035] This application proposes a defrosting device and defrosting control method, which can be applied to refrigerators. The defrosting device can be installed in a smart refrigerator. The device uses a dual-frequency impedance sensor to monitor the intracellular and extracellular liquid phase transition states of the food to be defrosted. A dual-frequency radio frequency energy generator uses dual-frequency radio frequency to synergistically heat the interior and surface of the food. By determining the intracellular and extracellular liquid impedance ratio and the phase angle of the impedance cells through the extracellular liquid resistance and total liquid resistance, the device intelligently judges the degree of defrosting and intelligently adjusts the ratio of the dual-frequency radio frequency to ensure complete defrosting without over-defrosting. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of a defrosting device provided in one embodiment of this application;

[0038] Figure 2 This is a flowchart of a defrosting control method provided in one embodiment of this application;

[0039] Figure 3 This is a schematic diagram of the detection process of a dual-frequency bioimpedance sensor provided in one embodiment of this application;

[0040] Figure 4 This is a schematic diagram illustrating the process of determining thawing instruction information according to an embodiment of this application;

[0041] Figure 5 This is a schematic diagram of the thawing process provided in one embodiment of this application. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings. It should be noted that all data used in the embodiments of this application has been fully authorized by the relevant parties before use.

[0043] This application provides a defrosting device; please refer to [reference needed]. Figure 1 The diagram illustrates a thawing device according to an embodiment of this application. The thawing device includes a dual-radio frequency energy generator for emitting dual-frequency electromagnetic waves into the thawing chamber; a dual-frequency bioimpedance sensor for detecting impedance ratio and phase angle information indicating the degree of thawing of food within the thawing chamber; and a controller connected to both the dual-radio frequency energy sensor and the dual-frequency bioimpedance sensor for controlling the dual-radio frequency energy generator based on the impedance ratio and phase angle information.

[0044] Specifically, the controller analyzes the received impedance ratio and phase angle information using a preset algorithm to determine the current thawing state of the food. If the food has not reached the ideal thawing level, the controller adjusts the output power and frequency of the dual radio frequency energy generators to optimize the penetration depth and heating efficiency of the electromagnetic waves, ensuring that the food thaws evenly and quickly. Furthermore, the controller has intelligent protection functions, automatically cutting off the power supply when abnormal conditions are detected, such as overheating of the food or equipment malfunction, ensuring safe operation.

[0045] In one exemplary embodiment, the dual-frequency bioimpedance sensor includes: a detection electrode and an excitation electrode; the dual-frequency bioimpedance sensor is located at the bottom of the thawing chamber, the detection electrode extends upward from the bottom of the thawing chamber and is exposed in the accommodating space of the thawing chamber, the accommodating space being used to place food; the excitation electrode extends upward from the bottom of the thawing chamber and is exposed in the accommodating space of the thawing chamber; and the dual radio frequency energy generator is located at the upper part of the thawing chamber.

[0046] This application does not limit the shape and arrangement of the detection electrode and the excitation electrode, as long as it ensures accurate and efficient acquisition of the food's bioimpedance information. The detection electrode is responsible for receiving the signal generated after the electromagnetic waves emitted by the excitation electrode propagate through the food; these signals contain information about the degree of thawing of the food. By calculating the impedance ratio and phase angle information, the controller can accurately determine the thawing state of the food. The dual radio frequency energy generator is located at the top of the thawing chamber; this layout facilitates uniform electromagnetic wave coverage of the entire containment space, further improving thawing efficiency and uniformity.

[0047] This application does not limit the structure of the dual-frequency bioimpedance sensor, which may include an electrode array comprising the aforementioned detection electrode and excitation electrode. The dual-frequency bioimpedance sensor may also include a signal generation module and a demodulation circuit module. For example, the electrode array can be measured using a four-terminal method, with the electrode layout as follows:

[0048] The excitation electrodes (E+, E-) are both gold-plated electrodes on the food contact surface, with a spacing of 20 mm;

[0049] The detection electrodes (S+, S-) are embedded Ag / AgCl electrodes with a spacing of 5 mm;

[0050] The excitation electrode and the detection electrode are wrapped with a shielding layer, which can be 0.1 mm thick and is made of PTFE film to prevent electrolytic corrosion.

[0051] The electrode array design makes the propagation of electromagnetic waves in food more stable and controllable, reducing interference from the external environment. The gold plating of the excitation electrodes E+ and E- not only improves their conductivity but also enhances their corrosion resistance and lifespan. The detection electrodes S+ and S- utilize embedded Ag / AgCl material, which possesses excellent biocompatibility and stable electrochemical properties, enabling accurate reception of signals after electromagnetic wave propagation. Furthermore, the 5mm spacing design ensures more precise detection.

[0052] The signal generation module generates dual-frequency electromagnetic wave signals, which are emitted into the food through the excitation electrode. The demodulation circuit module receives the reflected signals captured by the detection electrode and converts them into digital signals. These digital signals are then analyzed to obtain impedance ratio and phase angle information. Furthermore, the electrode array design ensures uniform distribution of electromagnetic waves throughout the food, improving measurement accuracy and thawing uniformity. The application of four-terminal measurement technology further enhances measurement stability and reliability. The gold plating and embedded Ag / AgCl material selection for the excitation and detection electrodes not only guarantees excellent conductivity but also effectively prevents electrolytic corrosion. The external PTFE coating shielding layer further enhances the sensor's durability and safety.

[0053] This application does not limit the operating frequency of the dual-frequency radio frequency energy generator. It can have two frequency levels: a low-frequency level and a high-frequency level, which emit low-frequency electromagnetic waves and high-frequency electromagnetic waves respectively. Low frequency and high frequency are relative concepts in this application embodiment. For example, the operating frequency of the low-frequency level is 1MHz, and the operating frequency of the high-frequency level is 13.56MHz. The parameters and characteristics of the dual-frequency radio frequency energy generator are detailed in Table 1.

[0054] Table 1

[0055]

[0056]

[0057] By adjusting the ratio information 'a' between the low-frequency and dual-frequency settings (also known as power ratio information or simply power ratio), the heating effect can be adjusted. During thawing, the rate of surface ice melting and core temperature rise is dynamically balanced to prevent overheating of the outer layer and subsequent protein denaturation. The power adjustable range of the dual-frequency radio frequency energy generator is 0-2kW. This application does not limit the structure of the dual-frequency radio frequency energy generator, but it can mainly include a radio frequency source, a directional coupler, electrodes, and a microchannel liquid cooling system. The dual-frequency radio frequency energy generator is primarily placed on top of the thawing chamber. The radio frequency source generates electromagnetic waves of the required frequency, and the directional coupler monitors and adjusts the transmission of the radio frequency signal to ensure precise energy control. The electrodes transfer the radio frequency energy to the food to be thawed, achieving the heating effect. The microchannel liquid cooling system cools the dual-frequency radio frequency energy generator, preventing overheating and ensuring stable operation of the equipment over a long period.

[0058] Based on this defrosting device, this application further provides a defrosting control method, which is applied to the controller of the aforementioned defrosting device. Please refer to [link / reference]. Figure 2 The diagram illustrates a flowchart of a defrosting control method according to an embodiment of this application. The method includes:

[0059] S201. When food to be thawed is placed in the thawing chamber, a dual-frequency bioimpedance sensor is triggered to detect impedance ratio information and phase angle information indicating the degree of thawing of the food in the thawing chamber.

[0060] The controller analyzes the thawing status of the food in real time based on the received impedance ratio and phase angle information. This application does not limit the detection method for the impedance ratio and phase angle information; these can be obtained using a dual-frequency bioimpedance sensor. In an exemplary embodiment, please refer to... Figure 3 This diagram illustrates the detection process of a dual-frequency bioimpedance sensor according to an embodiment of this application. The controller triggers the dual-frequency bioimpedance sensor to perform the following operations:

[0061] S301. Detect the extracellular fluid resistance Rec of food at low frequency and the total cellular fluid resistance Rinfinity at high frequency.

[0062] By analyzing the difference between these two resistance values, the impedance ratio and phase angle of the food can be calculated. This information reflects the internal moisture distribution of the food, thus indirectly indicating the degree of thawing.

[0063] This application does not limit the concepts of low frequency and high frequency. In this application, low frequency and high frequency are relative concepts and can be flexibly set according to the specific food type and thawing requirements. In one embodiment, the low dual-frequency bioimpedance sensor has two frequency levels: a low frequency of 50kHz and a high frequency of 200kHz.

[0064] S302. Based on the extracellular fluid resistance Rec and the total cellular fluid resistance Rinfinity, using the formula... Calculate the overall impedance, where α represents the distribution coefficient indicating cell structure, and κ is a fixed parameter related to the dual-frequency bioimpedance sensor.

[0065] Using the previous example, a low frequency of 50kHz was used to detect the extracellular fluid resistance Rec, and a high frequency of 200kHz was used to detect the total cellular fluid resistance Rinfinity, thus measuring the overall impedance. κ is a fixed parameter related to cell membrane capacitance, which does not pose an obstacle to implementation and is not limited. α values ​​between 0.7 and 0.9 represent normal cell structure; other values ​​do not represent normal cell structure.

[0066] S303.Use formula Calculate the impedance ratio information.

[0067] This impedance ratio information is... The ratio of .

[0068] S304. Calculate the initial phase angle θraw using the formula θraw=arctan(Q / I)×(180 / π), where Q and I represent the real part and imaginary part of the overall impedance, respectively; the initial phase angle θraw belongs to the phase angle information.

[0069] In this embodiment, Q and I can be calculated using the orthogonal demodulation method. For example, the AD5940 chip can be used to implement I / Q demodulation to obtain the real component I and the imaginary component Q of the impedance. Then, the initial phase angle θraw is calculated according to θraw=arctan(Q / I)×(180 / π). The dynamic range of the initial phase angle θraw is 0°~90° (corresponding to pure resistivity to pure capacitiveivity).

[0070] In one exemplary embodiment, the dual-frequency bioimpedance sensor includes a thermistor for acquiring the surface temperature T of a detection electrode, and the method includes triggering the dual-frequency bioimpedance sensor to perform the following operation: based on the formula Calculate the corrected phase angle θ corrected , where λ and These are all correction parameters, the phase angle θ corrected This belongs to the phase angle information.

[0071] For example, the accuracy of phase angle information can be improved through temperature compensation. For example, this can be achieved through real-time calibration using an NTC thermistor. Specifically, the NTC thermistor acquires the surface temperature T of the detection electrode in real time, based on the correction formula: θ corrected =θraw The phase angle θ is obtained by multiplying [1+0.0015×(T-25)]. corrected The phase angle θ corrected This pertains to the phase angle information. Using the phase angle θ corrected Instead of using the initial phase angle θraw to calculate the thawing indication information, the accuracy of the thawing indication information can be improved.

[0072] Furthermore, to optimize the defrosting process, defrosting-related parameters can be dynamically adjusted based on the corrected phase angle θcorrected. For example, when the phase angle θcorrected indicates that the medium between the electrodes is approaching its defrosting point, the controller can automatically reduce the defrosting power to avoid over-defrosting and resulting food quality degradation. Conversely, if the phase angle θcorrected indicates that the medium is still far from the defrosting point, the system can increase the defrosting power to improve defrosting efficiency. By introducing a correction formula for real-time calibration of the phase angle, the accuracy and efficiency of defrosting can be significantly improved, providing users with a more convenient and reliable defrosting experience.

[0073] S202. Based on the impedance ratio information and the phase angle information, determine the thawing indication information, which characterizes the degree of thawing.

[0074] For example, the defrosting device can intelligently select the appropriate defrosting mode for different defrosting needs. It can offer multiple defrosting modes, such as a rapid defrosting mode, a gentle defrosting mode, a custom defrosting mode, or a maintenance mode after defrosting is complete. The rapid defrosting mode is suitable for situations requiring urgent defrosting, quickly completing the process by increasing power and shortening defrosting time. The gentle defrosting mode focuses on preserving the original flavor and nutrients of food, minimizing damage to the food's internal structure by reducing power and extending defrosting time. The custom defrosting mode allows users to set specific defrosting parameters, such as defrosting time and power, according to their needs. By combining impedance ratio and phase angle information, the defrosting device can intelligently select the most suitable defrosting mode, providing users with a personalized defrosting experience.

[0075] In one exemplary implementation, please refer to Figure 4 This diagram illustrates the process of determining thawing indication information according to an embodiment of this application. The determination of thawing indication information based on the impedance ratio information and the phase angle information includes:

[0076] S401. Determine the first indication parameter based on the impedance ratio information; determine the second indication parameter based on the phase angle information.

[0077] The received impedance ratio information is analyzed to obtain a first indication parameter indicating the current thawing state of the food based on the magnitude of the impedance ratio. The phase angle information is analyzed to obtain a second indication parameter indicating the temperature distribution of the food.

[0078] S402. The sum of the first indication parameter and the second indication parameter is determined as the thawing indication information.

[0079] This application does not limit the calculation formulas for the first and second indicator parameters. Following the previous example, the calculation can be performed according to the formulas... Calculate the thawing instruction information Q, where As the first indicator parameter, This is the second indicator parameter.

[0080] Clearly, the unfreeze instruction information Q is a number greater than 0 and less than 1. Following the previous example, the meaning of the unfreeze instruction information Q is detailed in Table 2.

[0081] Table 2

[0082]

[0083] In Table 2, 'a' corresponds to the power ratio information below. The method further includes: determining that thawing is not yet complete when the thawing indication information is less than a preset threshold; and determining that thawing is complete when the thawing indication information is greater than or equal to the preset threshold. This embodiment does not set the preset threshold; taking Table 2 as an example, it can be 0.87. A Q value of 0.87 indicates that thawing is complete. When the thawing information indicates that thawing is complete, the power of the dual-frequency energy generator is reduced to a preset power threshold. This preset power threshold is used to maintain the thawing state of the food, corresponding to "1MHz power reduction maintenance" in Table 2. For example, when Q ≥ 0.87, it indicates that thawing is complete, and the dual-frequency radio frequency generator reduces its radio frequency power to a maintenance mode (P = 200W / m). 2 At this time, only 1MHz of electromagnetic waves exist.

[0084] S203. If the thawing information indicates that thawing is not yet complete, determine the power ratio information based on the thawing indication information, wherein the power ratio information indicates the energy ratio relationship between low-frequency electromagnetic waves and high-frequency electromagnetic waves; and control the dual radio frequency energy generator to thaw the food according to the power ratio information.

[0085] For example, determining the power ratio information based on the defrosting indication information includes: based on a formula Determine the power ratio information 'a', where Q is the defrosting indication information, and α, β, and γ are all adjustable parameters. Following the previous example, this can be based on the following formula... The power ratio information 'a' is calculated. The relevant information for 'a' is shown in Table 2, and will not be elaborated further.

[0086] In one embodiment, please refer to Figure 5 The diagram illustrates the thawing process according to an embodiment of this application. The thawing process includes:

[0087] In the initial stage, the food is placed in the defrosting chamber, and the dual-frequency radio frequency generator starts working, simultaneously generating dual-frequency electromagnetic waves. These two electromagnetic waves generate heat inside the food, initiating the defrosting process. As defrosting progresses, the dual-frequency bioimpedance sensor built into the defrosting device continuously monitors the food's impedance and feeds back the analyzed impedance ratio and phase angle information to the controller. The controller calculates the defrosting indication information Q based on the impedance ratio and phase angle information.

[0088] If Q ≥ 0.87, the thawing is considered complete, and the dual-frequency RF generator reduces the RF power to maintenance mode. Otherwise, the power ratio information a is calculated based on the thawing indication information Q, and high-frequency and low-frequency energy fields are emitted to heat and thaw the system based on the power ratio information a.

[0089] In an exemplary embodiment, a computer-readable storage medium is also provided, which stores at least one instruction, at least one program, code set, or instruction set, wherein the at least one instruction, at least one program, code set, or instruction set is executed by a processor to implement the above-described unfreezing control method.

[0090] Specifically, the defrosting control method is applied to the controller of the aforementioned defrosting device, and the method includes:

[0091] When food to be thawed is placed in the thawing chamber, a dual-frequency bioimpedance sensor is triggered to detect impedance ratio and phase angle information that indicate the degree of thawing of the food in the thawing chamber.

[0092] Based on the impedance ratio information and the phase angle information, thawing indication information is determined, wherein the thawing indication information characterizes the degree of thawing;

[0093] If the thawing information indicates that thawing has not been completed, power ratio information is determined based on the thawing information, wherein the power ratio information indicates the energy ratio relationship between low-frequency electromagnetic waves and high-frequency electromagnetic waves.

[0094] Based on the power ratio information, the dual radio frequency energy generator is controlled to defrost the food.

[0095] In one exemplary embodiment, the dual-frequency bioimpedance sensor is triggered to perform the following operations:

[0096] The extracellular fluid resistance Rec of food was detected at low frequency, and the total cellular fluid resistance Rinfinity was detected at high frequency.

[0097] Based on the extracellular fluid resistance Rec and the total cellular fluid resistance Rinfinity, and using the formula... Calculate the overall impedance, where α represents the distribution coefficient indicating cell structure and f indicates the detection frequency of the dual-frequency bioimpedance sensor;

[0098] Use formula Calculate impedance ratio information;

[0099] The initial phase angle θraw is calculated using the formula θraw=arctan(Q / I)×(180 / π), where Q and I represent the real part and imaginary part of the overall impedance, respectively; the initial phase angle θraw is part of the phase angle information.

[0100] In one exemplary embodiment, the dual-frequency bioimpedance sensor includes a thermistor for acquiring the surface temperature T of a detection electrode, and the method includes triggering the dual-frequency bioimpedance sensor to perform the following operation: based on the formula Calculate the corrected phase angle θ corrected , where λ and These are all correction parameters, the phase angle θ corrected This belongs to the phase angle information.

[0101] In one exemplary embodiment, determining the defrosting indication information based on the impedance ratio information and the phase angle information includes:

[0102] The first indication parameter is determined based on the impedance ratio information;

[0103] The second indication parameter is determined based on the phase angle information;

[0104] The sum of the first indication parameter and the second indication parameter is determined as the thawing indication information.

[0105] In one exemplary embodiment, the defrost indication information is a number greater than 0 and less than 1, and the method further includes:

[0106] If the thawing indication information is less than a preset threshold, it is determined that thawing has not yet been completed;

[0107] If the thawing indication information is greater than or equal to the preset threshold, the thawing is determined to be complete.

[0108] In one exemplary implementation, determining the power ratio information based on the defrosting indication information includes:

[0109] Based on formula Determine the power ratio information 'a', where Q is the defrosting indication information, and α, β, and γ are all adjustable parameters.

[0110] In one exemplary embodiment, the method further includes:

[0111] When the thawing information indicates that thawing is complete, the power of the dual radio frequency energy generator is reduced to a preset power threshold, which is used to maintain the thawing state of the food.

[0112] It should be understood that "multiple" as mentioned herein refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship. Furthermore, the step numbers described herein are merely illustrative of one possible execution order. In some other embodiments, the steps may not be executed in numerical order, such as two steps with different numbers being executed simultaneously, or two steps with different numbers being executed in the reverse order of the illustration. This application does not limit this.

[0113] In addition, in the specific embodiments of this application, data such as user information are involved. When the above embodiments of this application are applied to specific products or technologies, user permission or consent is required, and the collection, use and processing of related data must comply with the relevant laws, regulations and standards of the relevant countries and regions.

[0114] The above are merely exemplary embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims

1. A thawing device, comprising a thawing chamber, characterized in that, Also includes: A dual-frequency energy generator, which is used to transmit dual-frequency electromagnetic waves to the thawing chamber; A dual-frequency bioimpedance sensor is used to detect impedance ratio information and phase angle information that indicate the degree of thawing of food in the thawing chamber; A controller, which is connected to both the dual-RF energy sensor and the dual-frequency bioimpedance sensor, is used to control the dual-RF energy generator based on the impedance ratio information and the phase angle information.

2. The defrosting device according to claim 1, characterized in that, The dual-frequency bioimpedance sensor includes: a detection electrode and an excitation electrode; The dual-frequency bioimpedance sensor is located at the bottom of the thawing chamber. The detection electrode extends upward from the bottom of the thawing chamber and is exposed in the accommodating space of the thawing chamber, which is used to place food. The excitation electrode extends upward from the bottom of the thawing chamber and is exposed in the accommodating space of the thawing chamber. The dual radio frequency energy generator is located at the top of the thawing chamber.

3. A defrosting control method, said method being applied to the controller of the defrosting device according to claim 1 or 2, characterized in that, The method includes: When food to be thawed is placed in the thawing chamber, a dual-frequency bioimpedance sensor is triggered to detect impedance ratio and phase angle information that indicate the degree of thawing of the food in the thawing chamber. Based on the impedance ratio information and the phase angle information, thawing indication information is determined, wherein the thawing indication information characterizes the degree of thawing; If the thawing information indicates that thawing has not been completed, power ratio information is determined based on the thawing information, wherein the power ratio information indicates the energy ratio relationship between low-frequency electromagnetic waves and high-frequency electromagnetic waves. Based on the power ratio information, the dual radio frequency energy generator is controlled to defrost the food.

4. The thawing control method according to claim 3, wherein the method comprises triggering the dual-frequency bioimpedance sensor to perform the following operation: The extracellular fluid resistance Rec of food was detected at low frequency, and the total cellular fluid resistance Rinfinity was detected at high frequency. Based on the extracellular fluid resistance Rec and the total cellular fluid resistance Rinfinity, and using the formula... Calculate the overall impedance, where α represents the distribution coefficient indicating cell structure and κ is a fixed parameter related to the dual-frequency bioimpedance sensor; Use formula Calculate impedance ratio information; The initial phase angle θraw is calculated using the formula θraw = arctan(Q / I) × (180 / π), where, Q and I represent the real part and the imaginary part of the overall impedance, respectively; the initial phase angle θraw belongs to the phase angle information.

5. The thawing control method according to claim 4, characterized in that, The dual-frequency bioimpedance sensor includes a thermistor, which is used to acquire the surface temperature T of a detection electrode. The method includes triggering the dual-frequency bioimpedance sensor to perform the following operation: based on the formula... Calculate the corrected phase angle θ corrected , where λ and These are all correction parameters, the phase angle θ corrected This belongs to the phase angle information.

6. The thawing control method according to claim 4, characterized in that, The step of determining the defrosting indication information based on the impedance ratio information and the phase angle information includes: The first indication parameter is determined based on the impedance ratio information; The second indication parameter is determined based on the phase angle information; The sum of the first indication parameter and the second indication parameter is determined as the thawing indication information.

7. The thawing control method according to claim 3, characterized in that, The thawing indication information is a number greater than 0 and less than 1, and the method further includes: If the thawing indication information is less than a preset threshold, it is determined that thawing has not yet been completed; If the thawing indication information is greater than or equal to the preset threshold, the thawing is determined to be complete.

8. The thawing control method according to claim 3, characterized in that, The step of determining the power ratio information based on the thawing indication information includes: Based on formula Determine the power ratio information 'a', where Q is the defrosting indication information, and α, β, and γ are all adjustable parameters.

9. The method according to claim 3, characterized in that, The method further includes: When the thawing information indicates that thawing is complete, the power of the dual radio frequency energy generator is reduced to a preset power threshold, which is used to maintain the thawing state of the food.

10. A computer-readable storage medium, characterized in that, The storage medium stores at least one instruction, at least one program, code set, or instruction set, wherein the at least one instruction, the at least one program, the code set, or the instruction set is loaded and executed by a processor to implement the defrost control method as described in any one of claims 3 to 9.

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