CN111466508A - Radio frequency unfreezing device, refrigerator and radio frequency unfreezing method - Google Patents
Radio frequency unfreezing device, refrigerator and radio frequency unfreezing method Download PDFInfo
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- CN111466508A CN111466508A CN202010279247.7A CN202010279247A CN111466508A CN 111466508 A CN111466508 A CN 111466508A CN 202010279247 A CN202010279247 A CN 202010279247A CN 111466508 A CN111466508 A CN 111466508A
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
- A23L3/36—Freezing; Subsequent thawing; Cooling
- A23L3/365—Thawing subsequent to freezing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
- F25D23/12—Arrangements of compartments additional to cooling compartments; Combinations of refrigerators with other equipment, e.g. stove
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/003—Arrangement or mounting of control or safety devices for movable devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/005—Mounting of control devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/008—Alarm devices
Abstract
The invention provides a radio frequency unfreezing device, a refrigerator and a radio frequency unfreezing method. The detection module detects the impedance matching state of the radio frequency output loop in real time, and the control module adjusts the adjustable inductance-capacitance module in real time according to the impedance matching detection result, so that the radio frequency output loop reaches the optimal matching state. In addition, the radio frequency thawing device can be integrated in a refrigerator. By adopting the radio frequency thawing device provided by the invention, the thawing efficiency can be improved, the thawing time can be shortened, the types of thawed food can be widened, the foods with different weights can be thawed, and the defects of large occupied space, high cost, low customer utilization rate and the like of the traditional independent radio frequency thawing device can be overcome.
Description
Technical Field
The invention relates to the technical field of food thawing, in particular to a radio frequency thawing device, a refrigerator and a radio frequency thawing method.
Background
Compared with other unfreezing technologies, the radio frequency unfreezing technology has the advantages of high unfreezing speed, large penetrating depth, uniform heating and the like, and is gradually valued by the industry, in the utility model with the application number of CN201820771785.6, a unfreezing cavity and a radio frequency unfreezing device are disclosed, a L C oscillator is adopted, a metal column is used as an inductance component, a metal plate is used as a capacitance component, but when the inductance value and the capacitance value are fixed and unadjustable, due to the change of the dielectric constant of the unfrozen food during unfreezing, the dielectric parameters of different weights of different foods are different, a L C oscillator is difficult to form oscillation, the unfreezing effect is poor, the time is long, in the invention patent application with the application number of CN201910511180.2, an adjustable capacitor, a radio frequency equipment and a second unfreezing plate thereof are disclosed, but the second equipment and the second equipment have the defects of different weight, the difficulty in controlling the unfreezing structure, the unfreezing structure and the unfreezing structure of different weights and the unfreezing structure, the difficulty in controlling the unfreezing structure and the difficulty in the size of different food.
Meanwhile, the radio frequency thawing equipment in the prior art is used as an independent equipment, and has the defects of large occupied space, high cost, low customer utilization rate and the like.
Disclosure of Invention
In view of this, in order to solve the technical problems of how to quickly and uniformly thaw food and reduce the occupied space and cost of radio frequency thawing equipment, the invention provides a quick thawing device, a refrigerator and a radio frequency thawing method.
The invention solves the problems through the following technical scheme: a radio frequency thawing device comprises a control module, a thawing box, an adjustable inductance-capacitance module, a detection module, a power supply module and a radio frequency power source module, and is characterized in that the power supply module supplies power to the radio frequency thawing device; the adjustable inductance and capacitance module comprises an adjustable inductance and an adjustable capacitance; the radio frequency power source module converts the direct current electric energy output by the power source module into two paths of high-power electric energy with opposite phases and equal amplitudes and outputs the two paths of high-power electric energy to the adjustable inductance and capacitance module; the detection module is used for detecting the impedance matching state of the radio frequency output loop in real time and transmitting the detection result to the control module; the control module adjusts the inductance value of the adjustable inductor and/or the capacitance value of the adjustable capacitor in the adjustable inductor capacitor module in real time according to the impedance matching detection result, so that the radio frequency output loop reaches the optimal matching state.
Preferably, the radio frequency power source module comprises a signal generator, a primary power amplifying circuit, a balun circuit, a first power amplifying circuit and a second power amplifying circuit; the output state of the signal generator is determined by the control module; the radio frequency signal output by the signal generator is firstly amplified by the primary power amplifying circuit, then two paths of signals with opposite phases and equal amplitudes are formed by the balun circuit, and then are respectively amplified by the secondary power of the first power amplifying circuit and the secondary power of the second power amplifying circuit, so that the radio frequency high-power electric energy for unfreezing is generated.
Preferably, the thawing box comprises a first polar plate and a second polar plate, and the box body of the thawing box is made of shielding metal.
Preferably, the adjustable inductor-capacitor module comprises an adjustable inductor L1, an adjustable inductor L2, an adjustable inductor L, an adjustable inductor L, a fixed inductor L, a fixed inductor L, a fixed inductor L, an adjustable capacitor C1 and an adjustable capacitor C2, wherein one end of the adjustable inductor L51 is connected with a first input port, the other end of the adjustable inductor is connected with a first output port through an adjustable capacitor C1, one end of the adjustable inductor L2 is connected with a second input port, the other end of the adjustable inductor 3527 is connected with a second output port through an adjustable capacitor C2, one end of the fixed inductor L5 is connected with the ground, the other end of the fixed inductor 365 is connected with the first input port through an adjustable inductor L, one end of the fixed inductor L is connected with the ground, the other end of the fixed inductor 356 is connected with the second input port through an adjustable inductor L4, one end of the fixed inductor L is connected with a connection point of the adjustable inductor.
Preferably, the adjustable inductor is formed by connecting a plurality of sub-inductors in series, and each sub-inductor is connected with a controlled switch in parallel; the adjustable capacitor is formed by connecting a plurality of sub-capacitors in series, and each sub-capacitor is respectively connected with a controlled switch in parallel.
Preferably, the detection module detects the impedance matching state of the rf output loop by detecting the magnitudes of the output power and the reflected power of the rf power source module, and/or the input reflection coefficient S11.
Preferably, the control module comprises a processor, a memory, a control panel and a communication interface; and the control module is used for completing the state detection, data analysis and function control of the radio frequency thawing device.
The invention also provides a refrigerator integrated with the radio frequency thawing device, which is characterized by further comprising a heat dissipation assembly, wherein the heat dissipation assembly comprises a fan; the control module is placed at the top of the refrigerator; the power supply module, the radio frequency power supply module and the fan are arranged at the bottom of the refrigerator; the thawing box is placed at the lowest layer of the refrigerator; the adjustable inductance and capacitance module is arranged outside the foaming layer on the back of the unfreezing box.
Preferably, the refrigerator further comprises a temperature measuring component, and the temperature measuring component transmits the measured temperature data to the control module for analysis.
The invention also provides a radio frequency unfreezing method applied to the radio frequency unfreezing device, wherein the radio frequency unfreezing device comprises a control module, a unfreezing box, an adjustable inductance-capacitance module, a detection module, a power supply module and a radio frequency power supply module, the adjustable inductance-capacitance module comprises an adjustable inductance and an adjustable capacitance, and the radio frequency unfreezing device is characterized by comprising the following steps of:
step a, the control module receives a thawing instruction sent by a user and starts the radio frequency thawing device;
b, when the system is just started, the radio frequency power source module outputs low power;
c, the control module adjusts the inductance value of the adjustable inductor and/or the capacitance value of the adjustable capacitor in the adjustable inductor and capacitor module according to the impedance matching detection result of the detection module, so that the radio frequency output loop reaches the optimal matching state;
d, after the optimal matching is found, keeping the inductance value of the adjustable inductor and the capacitance value of the adjustable capacitor unchanged, and increasing the output power of the radio frequency power source module;
step e, the detection module detects the output power and the input reflection coefficient of the radio frequency power source module in real time S11;
step f, judging whether the input reflection coefficient S11 is larger than a first threshold value; if the input reflection coefficient S11 is greater than the first threshold, returning to the step b, reducing the output power of the radio frequency power source module, and reentering the optimal impedance matching mode; if the value is not greater than the first threshold value, entering the next step;
step g, judging whether the output power of the radio frequency power source module is greater than a second threshold value; if the output power of the radio frequency power source module is larger than a second threshold value, reducing the output power of the radio frequency power source module, and returning to the step e to continue real-time detection; if the threshold value is not greater than the second threshold value, entering the next step;
step h, judging whether the unfreezing is finished; if not, returning to the step e to continue the real-time detection; and if the thawing is finished, reminding the user of completing the thawing and closing the radio frequency thawing device.
The invention has the beneficial effects that: the adjustable inductance-capacitance module adopts a plurality of controlled adjustable inductances and adjustable capacitances as impedance auxiliary matching devices of the radio frequency output circuit, forms multiple combinations, has better matching effect than a single inductance or capacitance, has wider matching range and more ideal matching value, improves the unfreezing efficiency, shortens the unfreezing time, can also widen the types of unfrozen food and unfreezes food with different weights.
Meanwhile, the radio frequency thawing device is integrated in the refrigerator, and the heat generated by the power module, the radio frequency power source module and the adjustable inductance and capacitance module is not transferred to a refrigerating chamber and a freezing chamber of the refrigerator in the thawing process through corresponding arrangement, so that the normal work of the refrigerator is not influenced, the refrigerator can be refrigerated, frozen and thawed, one additional function is added to the refrigerator, and the defects of large occupied space, high cost, low customer utilization rate and the like of an independent radio frequency thawing device are overcome.
Drawings
FIG. 1 is a system block diagram of a radio frequency thawing apparatus provided by the present invention;
FIG. 2 is a block diagram of an RF power module of the RF thawing apparatus according to the present invention;
FIG. 3 is a circuit diagram of an adjustable LC module of the RF thawing apparatus according to the present invention;
FIG. 4 is a circuit diagram of an adjustable inductor according to the present invention;
FIG. 5 is a circuit diagram of an adjustable capacitor according to the present invention;
FIG. 6 is a schematic structural diagram of a refrigerator incorporating the RF thawing apparatus of the present invention;
fig. 7 is a flow chart of the operation of the rf thawing apparatus provided in the present invention.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention.
In one embodiment, a system block diagram of a radio frequency thawing device is shown in fig. 1, and the radio frequency thawing device comprises a control module 1, a thawing box 2, an adjustable inductance and capacitance module 3, a detection module 4, a power supply module 5 and a radio frequency power supply module 6. The adjustable inductor-capacitor module 3 includes an adjustable inductor and an adjustable capacitor, and is used for adjusting impedance matching of the output loop. The detection module 4 is used for detecting the impedance matching state of the radio frequency output loop in real time and transmitting the detection result to the control module 1. The power module 5 supplies power for the radio frequency thawing device. The thawing box 2 comprises a polar plate 201 and a polar plate 202, which can be two conductive plates with the same size and shape. The radio frequency thawing device can also comprise a sensor 7, and a microswitch is arranged in the sensor 7 and used for sensing the opening and closing state of the door of the thawing box and the like.
The thawed objects have different dielectric coefficients due to different weights, temperatures, shapes, and kinds, and the dielectric constant between the plates also varies with the degree of thawing when thawed. In this embodiment, the radio frequency power source module 6 converts the dc power output by the power source module 5 into two paths of high power with opposite phases and equal amplitudes, and outputs the two paths of high power to the adjustable lc module 3. The control module 1 adjusts the inductance value of the adjustable inductor and/or the capacitance value of the adjustable capacitor in the adjustable inductor-capacitor module 3 in real time according to the impedance matching detection result of the detection module 4, so that the radio frequency output loop reaches the optimal matching state, and the control module has the function of compensating the impedance difference caused by different types, sizes, positions, shapes and temperatures of the unfrozen object, and realizing the automatic compensation of the change of the unfrozen object in the whole process. The polar plate 201 and the polar plate 202 in the thawing box 2 respectively receive two paths of high-power electric energy transmitted by the radio frequency power source module 6 through the adjustable inductance-capacitance module 3, convert the electric energy into electromagnetic energy and efficiently and uniformly transmit the electromagnetic energy to food, and the electromagnetic energy with high speed change forces molecules, ions and the like in the food to violently move to heat up, so that the food is rapidly and uniformly thawed and heated. The box body of the thawing box 2 can be made of shielding metal material, and the box body is connected with the ground of the power module 5, so that the electromagnetic energy radiated by the pole plate 201 and the pole plate 202 is not leaked outwards.
As still another embodiment, a block diagram of the rf power source module 6 is shown in fig. 2. The rf power source module 6 includes a signal generator 601, a primary power amplifier circuit 602, a balun circuit 603, a first power amplifier circuit 604, and a second power amplifier circuit 605. The output state of the signal generator 601 is determined by the control module 1, such as on/off, output power, output frequency, etc., in this embodiment, the output frequency may range from 20MHz to 50 MHz; the radio frequency signal output by the signal generator 601 needs to pass through two stages of power amplification circuits, that is, after being primarily amplified by the primary power amplification circuit 602, two paths of signals with opposite phases and equal amplitudes are formed through the balun circuit 603, and then are respectively amplified by the secondary power of the first power amplification circuit 604 and the secondary power of the second power amplification circuit 605, so that the radio frequency high-power electric energy for unfreezing is generated. The rf high power electric energy output by the first power amplifying circuit 604 is output through a P1 port, and the rf high power electric energy output by the second power amplifying circuit 605 is output through a P2 port.
The adjustable inductor/capacitor module 3 is an inductor/capacitor matching network, and comprises a fixed inductor part and an adjustable inductor/capacitor part, wherein the adjustable inductor/capacitor part is internally provided with a plurality of controlled switches, each controlled switch is respectively connected with a sub-inductor or a sub-capacitor in parallel, the opening and the closing of the controlled switches can determine the access state of the sub-inductors or the sub-capacitors and change the impedance matching state of a radio frequency output loop, the control module 1 sends a control signal to control the opening and the closing of the controlled switches, for example, when the impedance matching state of the radio frequency output loop is not good and reaches a software set value during unfreezing, the control signal output by the control module 1 switches the controlled switches to find the optimal matching state of the radio frequency output loop, meanwhile, some fixed inductors in the adjustable inductor/capacitor module 3 are not connected in parallel with the controlled switches, namely, the control of the control module 1 is not controlled, the fixed inductors can play a role of sharing current or voltage, as a further embodiment, the circuit diagram of the adjustable inductor/capacitor module 3 is shown in fig. 3, one end of the adjustable inductor/capacitor module L is connected with an adjustable inductor/capacitor port L, the other end is connected with an adjustable inductor/capacitor port 638, the adjustable inductor/capacitor port is connected with an adjustable inductor/capacitor plate P2, the adjustable capacitor plate P2 is connected with an adjustable capacitor plate P2 port, the adjustable capacitor plate P2 port is connected with an adjustable capacitor plate P2 port, the adjustable capacitor plate P2 port 99 port, the adjustable capacitor plate P2 port is connected with the adjustable capacitor plate P2 port, the.
In another embodiment, the topology of the inductor and capacitor network between the P1 port and the output port D1 is similar to that between the P2 port and the output port D2, and is changed simultaneously, that is, two paths of adjustable inductors and adjustable capacitors at the same position can be controlled simultaneously by the same set of control signals.
Fig. 4 and 5 show a circuit diagram of an adjustable inductor and an adjustable capacitor as an example, the adjustable inductor is formed by connecting N sub-inductors L10-L1N in series, each sub-inductor L10-L1N is connected with a controlled switch K L1-K L N in parallel, the adjustable capacitor is formed by connecting N sub-capacitors C10-C1N in series, each sub-capacitor C10-C1N is connected with a controlled switch KC1-kcn in parallel, a power module supplies an operating voltage to the controlled switches, in this example, the controlled switches can be high-power relays, when a controlled switch is closed, the sub-inductor or the sub-capacitor connected in parallel is short-circuited by the switch, the sub-inductor or the sub-capacitor is not connected into the circuit, otherwise, when a controlled switch is opened, the sub-inductor or the sub-capacitor connected in parallel to the controlled switch is connected into the circuit, the adjustable inductance of the adjustable inductor and the adjustable capacitance of the controlled switch can be controlled by controlling the opening and closing of the controlled switch.
In another embodiment, the detection module 4 detects the impedance matching state of the rf output loop by detecting the rf parameters output by the first power amplifier circuit 604 and the second power amplifier circuit 605. Specifically, the rf parameters may be the magnitudes of the output power and the reflected power, and/or the input reflection coefficient S11. In another embodiment, the detection module 4 may be implemented by a directional coupler.
In another embodiment, the control module 1 performs state detection, data analysis and function control of the rf thawing apparatus. The control module 1 may comprise a processor, a memory, a control panel, a communication interface, etc. The control panel comprises keys, knobs and the like and is used for receiving signals input by a user, and the user selects functions through the control panel. The state detection comprises the state detection of a door switch of the thawing box, the control module 1 detects whether the microswitch is closed or not in real time, if the door of the thawing box is opened, the power module 5 cannot be opened, and the thawing program cannot run. The data analysis comprises collecting the output power, the reverse power and the input reflection coefficient S11 of the radio frequency power source module 6, and analyzing to obtain the impedance states of different kinds, temperatures, shapes and weights of food. The function control comprises controlling the output of the power supply module 5 through the power supply control signal output by the control module 1; the output power of the power amplifier is controlled by the bias voltage output by the control module 1; controlling the output states of the signal generator 601, the primary power amplifying circuit 602, the first power amplifying circuit 604 and the second power amplifying circuit 605 by the radio frequency control signal output by the control module 1; the on-off of the controlled switch on the adjustable inductance-capacitance module 3 is controlled by the switch switching control signal output by the control module 1.
Fig. 6 shows a schematic structural diagram of a refrigerator integrated with a radio frequency thawing device as an example. The control module 1 is placed at the top of the refrigerator; the power module 5, the radio frequency power source module 6 and the fan 8 are arranged at the bottom of the refrigerator; the thawing box 2 is placed at the lowest layer of the refrigerator; the adjustable inductance and capacitance module 3 is arranged outside the foaming layer on the back of the unfreezing box 2; the polar plate 201 is placed at the top center position of the unfreezing box 2 through an insulating support, and the polar plate 202 is placed at the bottom center position of the unfreezing box 2 through the insulating support; the polar plate 201 and the polar plate 202 are respectively connected with an output port D1 and an output port D2 of the adjustable inductance-capacitance module 3; the P1 port and the P2 port in the rf power module 6 are respectively electrically connected to the adjustable lc module 3 via coaxial lines. The layout is favorable for reducing the heat transferred to the refrigerating chamber and the freezing chamber generated by the power module 5, the radio frequency power source module 6 and the adjustable inductance and capacitance module 3 during thawing, and the normal operation of the refrigerator is not influenced. The refrigerator also comprises a heat dissipation assembly, a temperature measurement assembly and the like. The heat dissipation assembly comprises a fan and a plurality of heat dissipation structural parts with low heat resistance, and dissipates heat of the power module 5 and the radio frequency power module 6 in the system. The temperature measuring component comprises a thermistor and the like, and the thermistor mainly aims at the power module 5 and the radio frequency power source module 6 and transmits measured temperature data to the control module 1 for analysis so as to ensure the safe operation of the system.
Fig. 7 shows a flow chart of the operation of the rf thawing apparatus as an example. The method mainly comprises the following steps:
a. the control panel of the control module 1 receives a thawing instruction sent by a user, the radio frequency thawing device is started, and the control module 1 enables the radio frequency power source module 6, the detection module 4 and the like.
b. When the power supply module 6 is started, the power output is low, and the aim is to prevent the high power from causing irreversible damage to the device when the matching state is not good.
c. The control module 1 adjusts the inductance value of the adjustable inductor and/or the capacitance value of the adjustable capacitor in the adjustable inductor and capacitor module 3 according to the impedance matching detection result of the detection module 4, so that the radio frequency output loop reaches the optimal matching state.
d. After the best match is found, the inductance value of the adjustable inductor and the capacitance value of the adjustable capacitor are kept unchanged, and the output power of the radio frequency power source module 6 is increased to unfreeze food.
e. The detection module 4 detects the output power and the input reflection coefficient S11 of the rf power source module 6 in real time.
f. Whether the matching state is good or not is judged according to whether the input reflection coefficient S11 is larger than the first threshold, and the smaller the value of the input reflection coefficient S11 is, the better the matching state is. If the input reflection coefficient S11 is greater than the first threshold, returning to step b, reducing the output power of the rf power source module 6, and entering the optimal impedance matching mode again; and if the first threshold value is not greater than the first threshold value, the next step is carried out.
g. And judging whether the output power of the radio frequency power source module 6 is greater than a second threshold value. During thawing, the impedance of the rf output loop changes due to the change in the temperature of the food, so that the power output by the rf power source module 6 changes. If the output power of the radio frequency power source module 6 is greater than the second threshold, the control module 1 reduces the output power of the radio frequency power source module 6 by adjusting the bias voltage, and then returns to the step e to continue the real-time detection; and if the threshold value is not larger than the second threshold value, the next step is carried out.
h. Judging whether the unfreezing is finished or not; if not, returning to the step e to continue the real-time detection; and if the thawing is finished, reminding the user of completing the thawing and closing the radio frequency thawing device.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
1. A radio frequency thawing device comprises a control module, a thawing box, an adjustable inductance-capacitance module, a detection module, a power supply module and a radio frequency power source module, and is characterized in that the power supply module supplies power to the radio frequency thawing device; the adjustable inductance and capacitance module comprises an adjustable inductance and an adjustable capacitance; the radio frequency power source module converts the direct current electric energy output by the power source module into two paths of high-power electric energy with opposite phases and equal amplitudes and outputs the two paths of high-power electric energy to the adjustable inductance and capacitance module; the detection module is used for detecting the impedance matching state of the radio frequency output loop in real time and transmitting the detection result to the control module; the control module adjusts the inductance value of the adjustable inductor and/or the capacitance value of the adjustable capacitor in the adjustable inductor capacitor module in real time according to the impedance matching detection result, so that the radio frequency output loop reaches the optimal matching state.
2. The radio frequency thawing apparatus of claim 1, wherein the radio frequency power source module comprises a signal generator, a primary power amplifying circuit, a balun circuit, a first power amplifying circuit and a second power amplifying circuit; the output state of the signal generator is determined by the control module; the radio frequency signal output by the signal generator is firstly amplified by the primary power amplifying circuit, then two paths of signals with opposite phases and equal amplitudes are formed by the balun circuit, and then are respectively amplified by the secondary power of the first power amplifying circuit and the secondary power of the second power amplifying circuit, so that the radio frequency high-power electric energy for unfreezing is generated.
3. The radio frequency thawing apparatus according to claim 1, wherein the thawing box comprises a first polar plate and a second polar plate, and a box body of the thawing box is made of a shielding metal material.
4. The radio frequency thawing device according to claim 1, wherein the adjustable inductor/capacitor module comprises an adjustable inductor L1, an adjustable inductor L, an adjustable inductor L, an adjustable inductor L, a fixed inductor L, a fixed inductor L, a fixed inductor L, an adjustable capacitor C1, and an adjustable capacitor C2, wherein one end of the adjustable inductor L is connected to the first input port, and the other end is connected to the first output port through an adjustable capacitor C1, one end of the adjustable inductor L is connected to the second input port, and the other end is connected to the second output port through an adjustable capacitor C2, one end of the fixed inductor L is connected to ground, and the other end is connected to the first input port through an adjustable inductor L3, one end of the fixed inductor 396 is connected to ground, and the other end is connected to the second input port through an adjustable inductor L4, and one end of a fixed inductor L is connected to a connection point of the adjustable inductor L and the adjustable capacitor C1, and the other end is connected to a connection point of the adjustable inductor 58.
5. The radio frequency thawing apparatus according to claim 1, wherein said adjustable inductor comprises a plurality of sub-inductors connected in series, each of said sub-inductors being connected in parallel to a controlled switch; the adjustable capacitor is formed by connecting a plurality of sub-capacitors in series, and each sub-capacitor is respectively connected with a controlled switch in parallel.
6. The RF thawing apparatus of claim 1, wherein the detection module detects the impedance matching status of the RF output circuit by detecting the output power and the reflected power of the RF power source module, and/or the input reflection coefficient S11.
7. The rf thawing apparatus of claim 1, wherein the control module comprises a processor, a memory, a control panel, and a communication interface; and the control module is used for completing the state detection, data analysis and function control of the radio frequency thawing device.
8. A refrigerator integrated with a radio frequency thawing apparatus according to any of claims 1 to 7, further comprising a heat dissipating assembly comprising a fan; the control module is placed at the top of the refrigerator; the power supply module, the radio frequency power supply module and the fan are arranged at the bottom of the refrigerator; the thawing box is placed at the lowest layer of the refrigerator; the adjustable inductance and capacitance module is arranged outside the foaming layer on the back of the unfreezing box.
9. The refrigerator of claim 8, further comprising a temperature measurement component that transmits measured temperature data to the control module for analysis.
10. The radio frequency unfreezing method applied to the radio frequency unfreezing device comprises a control module, a unfreezing box, an adjustable inductance-capacitance module, a detection module, a power supply module and a radio frequency power source module, wherein the adjustable inductance-capacitance module comprises an adjustable inductor and an adjustable capacitor, and the method is characterized by comprising the following steps of:
step a, the control module receives a thawing instruction sent by a user and starts the radio frequency thawing device;
b, when the system is just started, the radio frequency power source module outputs low power;
c, the control module adjusts the inductance value of the adjustable inductor and/or the capacitance value of the adjustable capacitor in the adjustable inductor and capacitor module according to the impedance matching detection result of the detection module, so that the radio frequency output loop reaches the optimal matching state;
d, after the optimal matching is found, keeping the inductance value of the adjustable inductor and the capacitance value of the adjustable capacitor unchanged, and increasing the output power of the radio frequency power source module;
step e, the detection module detects the output power and the input reflection coefficient of the radio frequency power source module in real time S11;
step f, judging whether the input reflection coefficient S11 is larger than a first threshold value; if the input reflection coefficient S11 is greater than the first threshold, returning to the step b, reducing the output power of the radio frequency power source module, and reentering the optimal impedance matching mode; if the value is not greater than the first threshold value, entering the next step;
step g, judging whether the output power of the radio frequency power source module is greater than a second threshold value; if the output power of the radio frequency power source module is larger than a second threshold value, reducing the output power of the radio frequency power source module, and returning to the step e to continue real-time detection; if the threshold value is not greater than the second threshold value, entering the next step;
step h, judging whether the unfreezing is finished; if not, returning to the step e to continue the real-time detection; and if the thawing is finished, reminding the user of completing the thawing and closing the radio frequency thawing device.
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