Radio frequency unfreezing control method and device, radio frequency unfreezing device and refrigerator
By obtaining the phase information of the forward power and reflected power of the RF thawing device and calculating the phase acceleration, the problem of misjudgment of thawing completion during RF thawing is solved, and a more efficient thawing effect is achieved.
Patent Information
- Application Number
- CN202410328019.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-21
- Publication Date
- 2025-09-23
AI Technical Summary
In existing radio frequency thawing technology, the impedance change of the items to be thawed leads to poor thawing effect, and it is difficult to accurately judge whether the thawing is completed, which is prone to misjudgment.
By obtaining the phase information of the positive power and reflected power of the radio frequency thawing device during the thawing process, the phase acceleration is calculated, and the change of the phase acceleration is used to determine the completion of thawing and control the working state of the radio frequency thawing device.
Accurately judge whether the items to be thawed are thawed, reduce misjudgment and improve thawing effect.
Smart Images
Figure CN120684855A_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of electrical equipment, and in particular relates to a radio frequency thawing control method and device, a radio frequency thawing device and a refrigerator. Background Art
[0002] Radio frequency thawing technology is widely used in various electrical devices, primarily for defrosting frozen food. During the thawing process, the items absorb the power radiated by the plates. The power absorbed by the items is related to their impedance. During the thawing process, the temperature of the food constantly changes, causing the impedance of the food to constantly change, and thus the power absorbed by the items to also change. Without a tuned circuit and a matching impedance network, a fixed frequency method can no longer achieve optimal RF output, resulting in poor thawing performance.
[0003] In related technologies, impedance matching of items to be thawed can be achieved by adjusting a matching impedance network or by adjusting a set frequency. The fixed-frequency method, which uses a matching impedance network, ensures optimal output throughout the thawing process. However, since the initial temperature, type, size, shape, and location of the items to be thawed are unpredictable, using these characteristics to determine whether the items are thawed properly can easily lead to misjudgment. Summary of the Invention
[0004] The present application aims to at least to some extent solve the technical problem of easily misjudging the completion of thawing. To this end, the present application provides a radio frequency thawing control method, device, radio frequency thawing device and refrigerator.
[0005] In a first aspect, an embodiment of the present application provides a radio frequency thawing control method, comprising:
[0006] Obtaining phase information of the positive power and the reflected power of the radio frequency thawing device during the process of thawing the food to be thawed;
[0007] determining phase acceleration information of a phase change of the object to be thawed during the thawing process according to the phase information;
[0008] determining whether the radio frequency thawing device meets a thawing completion condition according to the phase acceleration information;
[0009] The working state of the radio frequency thawing device is controlled according to the judgment result.
[0010] In an optional embodiment of the present application, the step of determining whether the thawing of the radio frequency thawing device is completed according to the phase acceleration includes:
[0011] Determine a difference between at least two phase change accelerations to obtain an acceleration difference, wherein the phase change acceleration information includes a plurality of impedance change accelerations obtained at preset time intervals;
[0012] If the acceleration difference is greater than or equal to a set value, it is determined that the thawing of the radio frequency thawing device is completed.
[0013] In an optional embodiment of the present application, the step of determining the difference between at least two phase change accelerations to obtain an acceleration difference includes:
[0014] The acceleration difference is obtained by determining the difference between two adjacent phase change accelerations.
[0015] In an optional embodiment of the present application, the step of determining phase acceleration information of the phase change of the to-be-thawed item during the thawing process according to the phase information includes:
[0016] Determining a phase change speed according to a phase difference between the forward power and the reflected power at two adjacent moments and a preset acquisition time, wherein the phase information includes a plurality of phase differences between the forward power and the reflected power acquired at intervals of a preset time;
[0017] The phase change acceleration of the phase change is determined according to the phase change speeds at two adjacent moments and the preset time.
[0018] In an optional embodiment of the present application, obtaining phase information of the forward power and the reflected power of the radio frequency thawing device during the thawing of the food to be thawed includes:
[0019] Obtaining the phase angle of the forward power of the radio frequency thawing device at the current moment;
[0020] Obtaining the phase angle of the reflected power of the radio frequency thawing device at the current moment;
[0021] A phase difference between the forward power and the reflected power is determined according to the phase angle of the forward power and the phase angle of the reflected power.
[0022] In an optional embodiment of the present application, the step of controlling the working state of the radio frequency thawing device according to the judgment result includes:
[0023] If the thawing completion condition is met at the current moment, the radio frequency thawing device is controlled to exit the thawing mode.
[0024] In a second aspect, an embodiment of the present application provides a radio frequency thawing control device, the radio frequency thawing control device comprising:
[0025] An acquisition module is used to obtain phase information of the positive power and the reflected power of the radio frequency thawing device during the process of thawing the food to be thawed;
[0026] a determination module, configured to determine phase acceleration information of a phase change of the item to be thawed during the thawing process based on the phase information;
[0027] a judgment module, configured to judge whether the radio frequency thawing device meets a thawing completion condition based on the phase acceleration information;
[0028] The control module is used to control the working state of the radio frequency thawing device according to the judgment result.
[0029] The beneficial effects of the radio frequency thawing control method provided in the second aspect are the same as the beneficial effects of the radio frequency thawing control device provided in the first aspect, and will not be repeated here.
[0030] In a third aspect, an embodiment of the present application provides a radio frequency thawing device, comprising:
[0031] memory for storing computer programs;
[0032] A processor is configured to execute the computer program in the memory to implement the radio frequency thawing control method provided in the first aspect.
[0033] In a fourth aspect, an embodiment of the present application provides a refrigerator, comprising:
[0034] memory for storing computer programs;
[0035] A processor is configured to execute the computer program in the memory to implement the radio frequency thawing control method provided in the first aspect.
[0036] The beneficial effects of the refrigerator provided in the third aspect are the same as the beneficial effects of the radio frequency thawing control method provided in the first aspect, and will not be repeated here.
[0037] In a fifth aspect, an embodiment of the present application provides a computer storage medium for storing a computer program, which, when executed, can implement the radio frequency thawing control method provided in the first aspect.
[0038] The beneficial effects of the computer storage medium provided in the fifth aspect are the same as the beneficial effects of the radio frequency thawing control method provided in the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS
[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application, a brief introduction will be given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0040] Figure 1 The figure shows a block diagram of the composition of the radio frequency thawing device provided in an embodiment of the present application.
[0041] Figure 2 The relationship between the dielectric constant and temperature of different items to be thawed is shown.
[0042] Figure 3 The relationship between the dielectric loss factor and temperature of different items to be thawed is shown in FIG.
[0043] Figure 4 A flow chart of the radio frequency thawing control method provided in an embodiment of the present application is shown.
[0044] Figure 5 A flowchart of the sub-steps of step S100 of the radio frequency thawing control method provided in an embodiment of the present application is shown.
[0045] Figure 6 A flowchart of the sub-steps of step S200 of the radio frequency thawing control method provided in an embodiment of the present application is shown.
[0046] Figure 7 A flowchart of the sub-steps of step S300 of the radio frequency thawing control method provided in an embodiment of the present application is shown.
[0047] Figure 8 The figure shows a block diagram of the composition of the radio frequency thawing control device provided in an embodiment of the present application.
[0048] Figure numerals: 100 - RF thawing device, 120 - tuning module, 130 - plate, 140 - tuning inductor, 150 - including RF generating component, 152 - power module, 154 - power amplifier module, 154a - signal source, 154b - power amplifier circuit, 154c - detection circuit, 156 - control module, 10 - RF thawing control device, 11 - acquisition module, 12 - determination module, 13 - judgment module, 14 - control module. DETAILED DESCRIPTION
[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.
[0050] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship and movement status of various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.
[0051] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.
[0052] In addition, in the present invention, descriptions such as "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.
[0053] See also Figure 1 Radio frequency thawing technology is widely used in various electrical devices (e.g., radio frequency thawing devices, refrigerators, etc.), primarily for thawing food. Taking a radio frequency thawing device as an example, the application of radio frequency thawing technology is described. The radio frequency thawing device includes a radio frequency generating assembly 150 and a tuning module 120. The radio frequency generating assembly 150 includes a power module 152, a power amplifier module 154, and a control module 156. The power module 152, the power amplifier module 154, and the control module 156 are all electrically connected. The power module 152 is used to supply power to the power amplifier module 154 and the control module 156. The power amplifier module 154 is used to generate an initial signal of a set frequency. The control module 156 is used to control the operation of the circuits in the power module 152 and the power amplifier module 154. When the output power of the power amplifier module 154 needs to be adjusted, the control module 156 calculates a voltage regulation control instruction based on an internal algorithm and sends it to the power module 152. The power module 152 adjusts the voltage to change the output voltage of the power module 152.
[0054] The power amplifier module 154 includes a signal source 154a, a power amplifier circuit 154b and a detection circuit 154c. The signal source 154a is used to generate an initial signal of a set frequency (40.68MHz). The power amplifier circuit 154b is used to amplify the power of the initial signal, enhance the power of the initial signal, and output a power amplifier signal. The detection circuit 154c is used to detect the output power of the power amplifier signal and the reflected power reflected back from the tuning module 120, and feed it back to the control module 156.
[0055] The tuning module 120 includes a tuning inductor 140 and a plate 130 , which are electrically connected to the plate 130 and electrically connected to the power amplifier module 154 through the tuning inductor 140 . After receiving the power amplifier signal, the tuning module 120 radiates radio frequency energy to the food to quickly thaw the food.
[0056] During the thawing process, the items are primarily thawed by absorbing the power radiated by electrode plate 130. The more power the items absorb, the better the thawing effect. Reflected power is equal to the total power radiated by electrode plate 130 minus the power absorbed by the food. In other words, the greater the reflected power, the less power the items absorb, and the less reflected power, the more power the items absorb. Reflected power provides a direct indicator of the thawing effect of the items.
[0057] The power absorbed by the thawed item is related to its own impedance. During the thawing process, the temperature of the food constantly changes, causing the impedance of the food to constantly change. This in turn changes the power absorbed by the item, leading to a constant change in the phase difference of the normal reflected power. Without a tuned impedance matching network, a fixed-frequency approach can no longer achieve optimal RF output, resulting in poor thawing performance.
[0058] In related technologies, impedance matching of items to be thawed can be achieved by adjusting a matching impedance network or by adjusting a set frequency. The fixed-frequency method, which uses a matching impedance network, ensures optimal output throughout the thawing process. However, since the initial temperature, type, size, shape, and location of the items to be thawed are unpredictable, using these characteristics to determine whether the items are thawed properly can easily lead to misjudgment.
[0059] The radio frequency thawing control method, device, radio frequency thawing device, refrigerator, and storage medium provided in the embodiments of the present application can improve the above-mentioned problems. The radio frequency thawing control method, device, radio frequency thawing device, refrigerator, and storage medium provided in the embodiments of the present application can accurately determine whether the thawing of the items to be thawed is complete, reducing the misjudgment of the thawing completion and improving the accuracy of the judgment of whether the thawing of the items to be thawed is complete, thereby improving the thawing effect of the items to be thawed.
[0060] The embodiment of the present application provides a radio frequency thawing control method. The radio frequency thawing control method provided by the embodiment of the present application can reduce the misjudgment of thawing completion, improve the accuracy of judging whether the thawing of the items to be thawed is complete, and thus improve the thawing effect of the items to be thawed.
[0061] During the thawing process, the items absorb RF energy, causing their temperature to rise, ultimately achieving the desired thawing effect. The more RF energy absorbed, the faster the thawing process. As the temperature of the items changes, their impedance also changes, making it impossible to maintain optimal output at a fixed frequency. A matching impedance network can be used to ensure that the entire RF thawing system maintains optimal output.
[0062] According to the formula Q = cmΔT, Q = Pt, where P represents the absorbed power (known), t represents the thawing time, Q represents the absorbed energy, c represents the specific heat capacity of the item to be thawed (which changes with temperature), m represents the mass of the item to be thawed, and ΔT represents the temperature change. The temperature change is the difference between the current temperature and the initial temperature. Since the initial temperature is unknown and the mass of the items to be thawed is unknown, the thawing time of the items to be thawed cannot be calculated using this formula.
[0063] In addition, for a defrosting drawer, the mass can be corresponded to the impedance determined by the matching position; because the distribution of the drawer's capacitance electric field is not absolutely uniform, the impedance values of the items to be thawed placed in the center and corner positions are not consistent, resulting in different absorbed radio frequency energy, and thus different phase differences in the positive reflection power. Therefore, for a single drawer, there is a random error in converting the food mass using the matching position; for different drawers, due to structural errors (inductance structure error, plate installation error, etc.), the matching positions of the same ingredients will be different, and there will be structural errors in the conversion of food mass. In other words, there is a random error in judging whether the items to be thawed are complete by the phase difference of the items to be thawed, which is prone to increased errors.
[0064] The dielectric constant and dielectric loss factor of the item to be thawed are affected by temperature changes as it is a mixture. Since the water content of the item to be thawed is relatively high, during the thawing process, when the temperature of the item to be thawed approaches zero degrees, the shape of the ice crystals begins to change, and the equivalent conductivity and complex dielectric constant will show obvious changes.
[0065] The applicant has found through creative work that the dielectric constant and dielectric loss factor have an impact on the impedance of the items to be thawed, such as Figure 2 and Figure 3 As shown, Figure 2 The relationship between the dielectric constant and temperature of different items to be thawed is shown in FIG. Figure 3The relationship between the dielectric loss factor of different items to be thawed and temperature is shown. As can be seen from the figure, before 0°C, the closer to 0°C, the faster the change rate of the dielectric constant and the dielectric loss factor. Since the dielectric constant and the dielectric loss factor affect the impedance of the item to be thawed, and the impedance directly affects the phase difference of the forward reflection power. That is to say, in the temperature range near 0°C, there are obvious changes in the dielectric constant and the dielectric loss factor, resulting in changes in the impedance in the final temperature range, and thus the phase difference of the forward reflection power also has obvious changes. It can be judged whether the item to be thawed is thawed completely by the change rate of the phase difference of the forward reflection power.
[0066] That is to say, through creative labor, the applicant found that during the thawing process of the item to be thawed, near 0°C, roughly in the temperature range of (-3°C < T < 1°C), for the convenience of description, this temperature range is defined as the final temperature range. The first derivative of the phase difference of the forward emission power will have obvious changes, that is, the second derivative of the phase difference of the forward emission power will have a mutation in the final temperature range. It can be judged whether the item to be thawed is thawed completely by the second derivative of the phase difference of the forward emission power. Judging whether the item to be thawed is thawed completely by the second derivative of the phase difference of the forward emission power does not depend on factors such as the quality, temperature, and position of the item to be thawed, can accurately judge whether the item to be thawed is thawed completely, reduces the misjudgment of thawing completion, improves the judgment accuracy of whether the item to be thawed is thawed completely, and thus improves the thawing effect of the item to be thawed.
[0067] The following describes the present application in conjunction with the accompanying drawings and refers to specific embodiments. The specific steps of the radio frequency thawing control method are as follows:
[0068] Please refer to Figure 4 , step S100, obtain the phase information of the forward power and the reflected power during the thawing of the item to be thawed by the radio frequency thawing device 100.
[0069] Before thawing, first place the item to be thawed in the radio frequency thawing device 100, and the phase information of the forward power and the reflected power during the thawing process. The phase information is the relationship between the phase angle of the forward power and the phase angle of the reflected power sent by the radio frequency thawing device 100 during the thawing process. The phase information can be a continuous value or multiple discrete values obtained at intervals of a preset time.
[0070] The phase information can be obtained directly or calculated from other information, which can be determined according to the actual situation. One way to obtain the phase information will be listed below, specifically as steps S110, step S120, and step S130.
[0071] In some embodiments, the phase information includes multiple phase differences between the forward and reflected powers, obtained at predetermined time intervals. In other words, the phase information includes multiple phase differences between the forward and reflected powers. The following describes how to obtain the phase difference between the forward and reflected powers at each moment, using steps S110, S120, and S130. It should be noted that the phase difference between the forward and reflected powers refers to the phase difference between the forward and reflected powers, and for ease of description, is referred to as the phase difference between the forward and reflected powers.
[0072] See also Figure 5 , step S110, obtaining the phase angle of the positive power of the radio frequency thawing device 100 at the current moment.
[0073] In some embodiments, during the process of thawing the items to be thawed, the phase angle of the positive radiation power is obtained once at every preset time interval.
[0074] Step S120 , obtaining the phase angle of the reflected power of the RF thawing device 100 at the current moment.
[0075] In some embodiments, during the process of thawing the items to be thawed, the phase angle of the positive radiation power is obtained once at every preset time interval.
[0076] That is, at the current moment, the phase angle of the forward power and the phase angle of the reflected power are required simultaneously.
[0077] Step S130 : determining a phase difference between the forward power and the reflected power according to the phase angle of the forward power and the phase angle of the reflected power.
[0078] After the phase angle of the forward transmission power and the phase angle of the reflected power are obtained, the phase difference of the forward transmission power is calculated according to the phase angle of the forward transmission power.
[0079] The phase difference of the normal reflected power is calculated as the difference between the phase angles of the normal and reflected power. Within the temperature range around 0°C, the dielectric constant and dielectric loss factor change significantly, causing impedance to change within the final temperature range, which in turn causes the phase difference of the normal reflected power to change significantly. The rate of change of the phase difference of the normal reflected power can be used to determine whether the item to be thawed is complete.
[0080] See also Figure 4 In step S200, phase acceleration information of the phase change of the object to be thawed during the thawing process is determined according to the phase information.
[0081] Since the phase information includes the phase differences of multiple normal reflection powers, the phase acceleration information during the entire thawing process can be determined according to the phase differences of the multiple normal reflection powers.
[0082] Among them, the phase acceleration information includes multiple phase change accelerations. During the thawing process, the items to be thawed are a mixture, and the dielectric constant and dielectric loss factor are affected by temperature changes. Since the water content of the items to be thawed is relatively high, during the thawing process, when the temperature of the items to be thawed approaches zero degrees, the shape of the ice crystals begins to change, and the equivalent conductivity and complex dielectric constant will show obvious changes. As a result, the impedance of the items to be thawed will send detailed changes, and the phase difference of the normal reflection power will also change significantly.
[0083] Due to the different sizes and types of items to be thawed, the change rate of the phase difference of one item at -3°C may be the same as the change rate of the phase difference of another sample at -1°C. Using the first-order derivative of the phase difference with respect to time to directly judge the temperature is inaccurate.
[0084] Through creative work, the applicant discovered that during the thawing process, no matter what size or type of items to be thawed, the acceleration of the phase difference of the positive transmission power will undergo a sudden change within the final temperature range, and the change in the acceleration of the phase difference can be used to determine whether the thawing is complete.
[0085] See also Figure 6 The specific steps of phase change acceleration are as follows: Step S200 may include step S210 and step S220.
[0086] Step S210 : determining a phase change speed according to a phase difference between the forward power and the reflected power at two adjacent moments and an acquired preset time.
[0087] The preset time is the interval between the phase differences of two adjacent normal reflection powers, and the phase change speed is calculated based on the phase difference of the positive transmission power at two adjacent moments and the preset time.
[0088] Specifically, the phase difference of the normal reflection power at two adjacent moments is first calculated, and then the ratio of the difference to the preset time is calculated to obtain the phase change rate. In other words, the phase change rate is the first-order derivative of the phase difference of the normal reflection power with respect to time.
[0089] Step S220 , determining a phase change acceleration of the phase change according to the phase change speeds at two adjacent moments and a preset time.
[0090] After the phase change speed is obtained, the phase change acceleration can be determined according to the phase change speeds calculated at two adjacent moments, that is, the second-order derivative of the phase difference of the normal reflection power with respect to time can be determined.
[0091] Specifically, the difference between the phase change speeds of two adjacent times is calculated first, and then the ratio between the difference and the preset time is calculated to obtain the phase change acceleration.
[0092] See also Figure 4 , step S300, judging whether the RF thawing device 100 meets the thawing completion condition according to the phase acceleration information.
[0093] After calculating the phase change acceleration, the phase change acceleration can be used to determine whether the thawing of the items to be thawed is complete at the current moment. Within the final temperature range, the phase change acceleration will have a sudden change, and whether the phase change acceleration has a sudden change can be used to determine whether the thawing completion condition is met.
[0094] See also Figure 7 , wherein step S300 may include step S310 and step S320.
[0095] Step S310: Determine the difference between at least two phase change accelerations to obtain an acceleration difference, wherein the phase change acceleration information includes a plurality of impedance change accelerations obtained at preset time intervals.
[0096] The difference between at least two phase change accelerations can be calculated to determine whether the phase change acceleration has a sudden change. Specifically, the acceleration difference can be obtained by determining the difference between two adjacent phase change accelerations.
[0097] In addition, the acceleration difference can also be calculated based on the difference between multiple phase change accelerations. For example, the acceleration difference can be calculated based on the phase change accelerations at three consecutive moments. For example, the limit change accelerations at three consecutive moments are A1, A2, and A3, respectively. The acceleration difference can be calculated according to the following formula: (A2+A3)-(A1+A2). Of course, the acceleration difference can also be calculated when the phase change accelerations at four consecutive moments are accelerated. For example, the limit change accelerations at four consecutive moments are A1, A2, A3, and A4, respectively. The acceleration difference can be calculated according to the following formula: (A3+A4)-(A1+A2).
[0098] In step S320 , if the acceleration difference is greater than or equal to the set value, it is determined that the thawing of the RF thawing device 100 is completed.
[0099] If the acceleration difference is greater than or equal to the set value, it means that the phase change acceleration has undergone a sudden change. During the thawing process, no matter what size or type of items to be thawed, within the final temperature range, the acceleration of the phase difference of the positive transmission power will undergo a sudden change. The acceleration change of the phase difference can be used to determine whether the thawing is complete.
[0100] See also Figure 4 , step S400, controlling the working state of the radio frequency thawing device 100 according to the judgment result.
[0101] The judgment result includes two situations: the thawing completion condition is met and the thawing completion condition is not met. If the thawing completion condition is met at the current moment, it means that the thawing is complete, and the radio frequency thawing device 100 can be controlled to exit the thawing mode. If the thawing completion condition is not met, steps S100 to S400 are repeated until the thawing completion condition is met.
[0102] In summary, the RF thawing control method provided in the embodiment of the present application determines whether the thawing of the items to be thawed is complete by using the second-order derivative of the phase difference of the positive transmission power with respect to time. It does not depend on factors such as the quality, temperature and position of the items to be thawed. It can accurately determine whether the thawing of the items to be thawed is complete, reduces the misjudgment of the thawing completion, improves the accuracy of the judgment of whether the thawing of the items to be thawed is complete, and thus improves the thawing effect of the items to be thawed.
[0103] See also Figure 8 , see Figure 8 Based on the same inventive concept, the embodiment of the present application further provides a radio frequency thawing control device 10, which includes:
[0104] The acquisition module 11 is used to acquire phase information of the direct power and the reflected power of the radio frequency thawing device 100 during the process of thawing the food to be thawed.
[0105] The acquisition module 11 is used to obtain the phase angle of the positive power of the radio frequency thawing device 100 at the current moment.
[0106] The acquisition module 11 is configured to acquire the phase angle of the reflected power of the radio frequency thawing device 100 at the current moment.
[0107] The acquisition module 11 is configured to determine a phase difference between the forward power and the reflected power according to the phase angle of the forward power and the phase angle of the reflected power.
[0108] Step S100 and its sub-steps of the radio frequency thawing control method provided in the embodiment of the present application may be executed by the acquisition module 11 .
[0109] The determination module 12 is configured to determine phase acceleration information of the phase change of the object to be thawed during the thawing process according to the phase information.
[0110] The determination module 12 is configured to determine a phase change speed according to a phase difference between the forward power and the reflected power at two adjacent moments and an acquired preset time.
[0111] The determination module 12 is configured to determine a phase change acceleration of the phase change according to the phase change speeds at two adjacent moments and a preset time.
[0112] Step S200 and its sub-steps of the radio frequency thawing control method provided in the embodiment of the present application may be executed by the determination module 12 .
[0113] The judging module 13 is configured to judge whether the RF thawing device 100 meets the thawing completion condition according to the phase acceleration information.
[0114] The judgment module 13 is configured to obtain an acceleration difference value based on the difference between at least two phase change accelerations, wherein the phase change acceleration information includes a plurality of impedance change accelerations obtained at preset time intervals.
[0115] The judgment module 13 is configured to determine that the thawing of the radio frequency thawing device 100 is completed if the acceleration difference is greater than or equal to a set value.
[0116] Step S300 and its sub-steps of the radio frequency thawing control method provided in the embodiment of the present application can be executed by the judgment module 13 .
[0117] The control module 14 is used to control the working state of the radio frequency thawing device 100 according to the judgment result.
[0118] Step S400 of the RF thawing control method provided in the embodiment of the present application can be executed by the control module 14. Based on the same inventive concept, the embodiment of the present application also provides a computer storage medium storing a computer program, which, when executed by a processor, implements the above-mentioned RF thawing control method.
[0119] Based on the same inventive concept, an embodiment of the present application further provides a radio frequency thawing device 100, comprising: a memory and a processor, wherein the memory is used to store a computer program; and the processor is used to execute the computer program in the memory to implement the above-mentioned radio frequency thawing control method.
[0120] Based on the same inventive concept, an embodiment of the present application also provides a refrigerator, comprising: a memory and a processor, the memory being used to store a computer program; the processor being used to execute the computer program in the memory to implement the above-mentioned radio frequency thawing control method.
[0121] Specifically, embodiments of the present application provide a radio frequency thawing control method and device, which are applied to a radio frequency thawing device 100 or a refrigerator. Both the radio frequency thawing device 100 and the refrigerator include a housing, a memory, a processor, a peripheral interface, and a radio frequency thawing control device 10. The memory and processor are both installed on the housing. The memory is used to store computer programs, and the processor is used to execute the computer programs stored in the memory to implement the radio frequency thawing control method described above.
[0122] The memory and processor components are electrically connected, directly or indirectly, to each other to enable data transmission or interaction. For example, these components can be electrically connected via one or more communication buses or signal lines. The RF thawing control device 10 includes at least one software functional module, which can be stored in the memory in the form of software or firmware or embedded in the server's operating system (OS). The processor is configured to execute executable modules 14 stored in the memory, such as the software functional modules and computer programs included in the RF thawing control device 10.
[0123] In one feasible embodiment, the processor can be an integrated circuit chip with signal processing capabilities. The processor can be integrated into the refrigerator or the radio frequency thawing device 100. The above-mentioned processor can be a general-purpose processor, including a central processing unit (CPU), or a single-chip microcomputer, a microcontroller unit (MCU), a complex programmable logic device (CPLD), a field programmable gate array (FPGA), an application-specific integrated circuit (ASIC), an embedded ARM chip, etc. The processor can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present application.
[0124] In a feasible embodiment, the memory is used to store program instructions that can be executed by the processor. For example, the radio frequency thawing control device 10 provided in the embodiment of the present application includes at least one that can be stored in the memory in the form of software or firmware. The memory can be an independent external memory, including but not limited to random access memory (RAM), read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), and electrically erasable read-only memory (EEPROM). The memory can also be integrated with the processor, for example, the memory can be integrated with the processor in the same chip.
[0125] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.
[0126] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.
[0127] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.
Claims
1. A radio frequency thawing control method, characterized in that: include: Obtaining phase information of the positive power and the reflected power of the radio frequency thawing device during the process of thawing the food to be thawed; determining phase acceleration information of a phase change of the object to be thawed during the thawing process according to the phase information; determining whether the radio frequency thawing device meets a thawing completion condition according to the phase acceleration information; The working state of the radio frequency thawing device is controlled according to the judgment result.
2. The radio frequency thawing control method according to claim 1, characterized in that: The step of judging whether the thawing of the radio frequency thawing device is completed according to the phase acceleration includes: Determine a difference between at least two phase change accelerations to obtain an acceleration difference, wherein the phase change acceleration information includes a plurality of impedance change accelerations obtained at preset time intervals; If the acceleration difference is greater than or equal to a set value, it is determined that the thawing of the radio frequency thawing device is completed.
3. The radio frequency thawing control method according to claim 2, characterized in that: The step of determining the difference between at least two phase change accelerations to obtain an acceleration difference comprises: The acceleration difference is obtained by determining the difference between two adjacent phase change accelerations.
4. The radio frequency thawing control method according to any one of claims 1 to 3, characterized in that: The step of determining phase acceleration information of the phase change of the object to be thawed during the thawing process according to the phase information includes: Determining a phase change speed according to a phase difference between the forward power and the reflected power at two adjacent moments and a preset acquisition time, wherein the phase information includes a plurality of phase differences between the forward power and the reflected power acquired at intervals of a preset time; The phase change acceleration of the phase change is determined according to the phase change speeds at two adjacent moments and the preset time.
5. The radio frequency thawing control method according to any one of claims 1 to 3, characterized in that: Acquiring phase information of the forward power and the reflected power of the radio frequency thawing device during the thawing of food includes: Obtaining the phase angle of the forward power of the radio frequency thawing device at the current moment; Obtaining the phase angle of the reflected power of the radio frequency thawing device at the current moment; A phase difference between the forward power and the reflected power is determined according to the phase angle of the forward power and the phase angle of the reflected power.
6. The radio frequency thawing control method according to any one of claims 1 to 3, characterized in that: The step of controlling the working state of the radio frequency thawing device according to the judgment result includes: If the thawing completion condition is met at the current moment, the radio frequency thawing device is controlled to exit the thawing mode.
7. A radio frequency thawing control device, characterized in that: The radio frequency thawing control device comprises: An acquisition module is used to obtain phase information of the positive power and the reflected power of the radio frequency thawing device during the process of thawing the food to be thawed; a determination module, configured to determine phase acceleration information of a phase change of the item to be thawed during the thawing process based on the phase information; a judgment module, configured to judge whether the radio frequency thawing device meets a thawing completion condition based on the phase acceleration information; The control module is used to control the working state of the radio frequency thawing device according to the judgment result.
8. A radio frequency thawing device, characterized in that: include: memory for storing computer programs; A processor, configured to execute the computer program in the memory to implement the radio frequency thawing control method according to any one of claims 1 to 6.
9. A refrigerator, characterized in that: include: memory for storing computer programs; A processor, configured to execute the computer program in the memory to implement the radio frequency thawing control method according to any one of claims 1 to 6.
10. A computer storage medium, characterized in that Used to store a computer program, which, when executed, can implement the radio frequency thawing control method according to any one of claims 1 to 6.