Food heating system and method based on radio frequency microwaves
By embedding ferrite in ceramic plates and combining phased array antenna arrays and processors, the problems of low energy utilization and uneven heating in traditional microwave heating technology are solved, and precise heating and efficient energy utilization of food are achieved.
Patent Information
- Application Number
- CN202510778080.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-11
- Publication Date
- 2025-07-25
AI Technical Summary
Traditional microwave heating technology has low energy utilization rate and uneven heating, making it difficult to accurately adjust energy according to the location of the food, resulting in low heating efficiency and local overheating or insufficient heating of the food.
A food heating system based on radio frequency microwave is adopted, and ferrite is embedded with ceramic plates, combined with phased array antenna array and processor, the food position is obtained through the position detection module, and the transmission and phase of the radio frequency microwave signal is controlled to accurately control the energy distribution, and the ferrite is used to absorb unheated energy into thermal energy.
Accurate heating according to the location of the food is achieved, energy utilization is improved, local overheating or insufficient heating of food is avoided, and heating efficiency is improved.
Smart Images
Figure CN120379089A_ABST
Abstract
Description
Technical Field
[0001] The embodiments of the present application relate to the field of microwave heating, and in particular, to a food heating system and method based on radio frequency microwave. Background Art
[0002] Traditional microwave heating technology usually uses a magnetron to generate microwaves, and the microwave energy is distributed by reflection in the heating cavity to heat food. However, this heating method has problems such as low energy utilization efficiency and uneven heating. Since the reflection and scattering of microwaves in the cavity cannot be precisely controlled, part of the energy overflows without being absorbed by the food, resulting in a reduction in heating efficiency. In addition, it is difficult for the traditional microwave heating method to precisely adjust the energy according to the position of the food, which may cause local overheating or insufficient heating of the food, affecting the heating effect.
[0003] Therefore, there is an urgent need for a microwave heating system that can improve energy utilization efficiency, reduce microwave overflow, and perform directional heating according to the position of the food to meet the requirements of efficient and precise heating. Summary of the Invention
[0004] In view of the above problems, the embodiments of the present application provide a food heating system and method based on radio frequency microwave, which overcome the above problems or at least partially solve the problems of low heating efficiency of the traditional microwave heating technology, inability to precisely adjust the energy according to the position of the food, which may cause local overheating or insufficient heating of the food, affecting the heating effect.
[0005] In the first aspect of the embodiments of the present application, a food heating system based on radio frequency microwave is provided. The system includes: a ceramic plate, a radio frequency generator, a phased array antenna array, and a processor. Ferrite is embedded in the ceramic plate, and the ceramic plate is used to place food. The radio frequency generator is located below the ceramic plate, and the radio frequency generator is used to emit a first radio frequency microwave signal. The phased array antenna array is connected to the radio frequency generator, and the phased array antenna array is also connected to the processor. The processor is used to obtain the placement position of the food and send a control signal to the phased array antenna array according to the placement position. The control signal is used to control the phased array antenna array to transmit and process the first radio frequency microwave signal. The phased array antenna array is used to receive the control signal, transmit and process the first radio frequency microwave signal according to the control signal, and use the second radio frequency microwave signal to heat the food, where the second radio frequency microwave signal is the signal output after the first radio frequency microwave signal is transmitted and processed by the phased array antenna array. The ferrite is used to confine the second radio frequency microwave signal within a first space, where the first space refers to the area formed above the ceramic plate and the ceramic plate.
[0006] In the embodiments of the present application, through the provided processor and phased array antenna array, the first radio frequency microwave signal emitted by the radio frequency generator can be transmitted and processed according to the placement position of the food, and the second radio frequency microwave signal is output. This second radio frequency microwave signal is used to heat the food. In this way, the microwave heating method provided by the present application can accurately control the energy absorbed by the food according to the placement position of the food, improve the heating efficiency, and at the same time avoid local overheating or insufficient heating of the food, which affects the heating effect. Moreover, in the present application, a ferrite is embedded in the ceramic plate, and the ferrite can further absorb the second radio frequency microwave signal, convert the absorbed second radio frequency microwave signal into heat energy to heat the food, and prevent the second radio frequency microwave signal from escaping outside the first space, further improving the heating efficiency.
[0007] In an optional manner, the food heating system based on radio frequency microwaves further includes a position detection module. The ceramic plate includes a central heating area, a left heating area, and a right heating area. The position detection module is used to detect the placement position of the food and send the placement position to the processor. The placement position refers to which area of the ceramic plate the food is located in.
[0008] In an optional manner, the phased array antenna array includes a first antenna unit and a second antenna unit. The first antenna unit is located below the left heating area, and the second antenna unit is located below the right heating area. The processor is used to send a control signal to the phased array antenna array according to the placement position, specifically including: when the processor obtains that the placement position is the central heating area, sending a first control signal to the phased array antenna array, and the first control signal is used to control the second radio frequency microwave signals output by the first antenna unit and the second antenna unit to have no phase shift. When the processor obtains that the placement position is the left heating area, sending a second control signal to the phased array antenna array, and the second control signal is used to control the second radio frequency microwave signal output by the first antenna unit to be delayed with respect to the second radio frequency microwave signal output by the second antenna unit. When the processor obtains that the placement position is the right heating area, sending a third control signal to the phased array antenna array, and the third control signal is used to control the second radio frequency microwave signal output by the first antenna unit to be advanced with respect to the second radio frequency microwave signal output by the second antenna unit.
[0009] In this embodiment, when the processor obtains that the placement position is the central heating area, the first control signal controls the second RF microwave signals output by the first antenna unit and the second antenna unit to have no phase shift, so that the second RF microwave signals are concentrated in the central heating area. When the processor obtains that the placement position is the left heating area, the second control signal controls the second RF microwave signal output by the first antenna unit to be delayed with respect to the second RF microwave signal output by the second antenna unit, so that the second RF microwave signals are concentrated in the left heating area. When the processor obtains that the placement position is the right heating area, the third control signal controls the second RF microwave signal output by the first antenna unit to be advanced with respect to the second RF microwave signal output by the second antenna unit, so that the second RF microwave signals are concentrated in the right heating area.
[0010] In an alternative manner, a plurality of ferrites are embedded in the ceramic plate, and the number of ferrites embedded in the left heating area and the right heating area is more than the number of ferrites embedded in the central heating area.
[0011] In this way, it is possible to further prevent the second RF microwave signals from escaping outside the first space and improve the heating efficiency.
[0012] In an alternative manner, the number of ferrites embedded in the part of the left heating area far from the central heating area is more than the number of ferrites embedded in the part of the left heating area close to the central heating area.
[0013] In an alternative manner, the antennas in the first antenna unit and the second antenna unit are all directional antennas.
[0014] In this way, the second RF microwave signals can be restricted within a certain angle.
[0015] In an alternative manner, the phased array antenna array further includes a phase shifter and a power amplifier. The RF generator, the phase shifter, and the power amplifier are connected in sequence. The phase shifter is used to control the phase relationship between the second RF microwave signal output by the first antenna unit and the second RF microwave signal output by the second antenna unit. The power amplifier is used to amplify the first RF microwave signal.
[0016] In an alternative manner, the system further includes a box body, the ceramic plate is arranged in the box body, and a receiving cavity is provided on the bottom wall of the box body, and the RF generator, the phased array antenna array, and the processor are arranged in the receiving cavity.
[0017] In a second aspect of the embodiments of the present application, a food heating method based on radio frequency microwave is provided, including: embedding a ferrite in a ceramic plate on which food is placed; arranging a radio frequency generator below the ceramic plate, and the radio frequency generator emits a first radio frequency microwave signal; connecting a phased array antenna array to the radio frequency generator and connecting the phased array antenna array to a processor; the processor obtains the placement position of the food and sends a control signal to the phased array antenna array according to the placement position, and the control signal controls the phased array antenna array to transmit and process the first radio frequency microwave signal; the phased array antenna array receives the control signal, transmits and processes the first radio frequency microwave signal according to the control signal, and heats the food through a second radio frequency microwave signal, where the second radio frequency microwave signal is a signal output after the first radio frequency microwave signal is transmitted and processed by the phased array antenna array.
[0018] In an optional manner, a position detection module detects the placement position of the food and sends the placement position to the processor, and the placement position refers to which area of the ceramic plate the food is located in.
[0019] The above description is only an overview of the technical solutions of the embodiments of the present application. In order to be able to understand the technical means of the embodiments of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the embodiments of the present application more obvious and understandable, the specific embodiments of the present application are specifically given below. Description of the Drawings
[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.
[0021] Figure 1 Schematic structural diagram of a food heating system based on radio frequency microwave provided by some embodiments of the present application when the front wall is removed.
[0022] Figure 2 Schematic structural diagram of a ceramic plate with a ferrite embedded therein provided by some embodiments of the present application.
[0023] Figure 3 Schematic diagram of the positional relationship among a ceramic plate, a first antenna unit and a second antenna unit provided by some embodiments of the present application.
[0024] Figure 4 Schematic diagram when the second radio frequency microwave signal is concentrated in the central heating area provided by some embodiments of the present application.
[0025] Figure 5Schematic diagram when the second radio frequency microwave signal in some embodiments of the present application is concentrated in the left heating area.
[0026] Figure 6 Schematic diagram when the second radio frequency microwave signal in some embodiments of the present application is concentrated in the right heating area.
[0027] Figure 7 Flowchart of a food heating method based on radio frequency microwave provided by an embodiment of the present application. Detailed implementation manners
[0028] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.
[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used in the description of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.
[0030] The terms "including" and "having" and any variations thereof in the description and claims of this application and the accompanying drawings are intended to cover but not exclude other elements. The word "a" or "an" does not exclude the presence of a plurality.
[0031] Referring to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase "embodiments" appearing in various places in the description is not necessarily referring to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.
[0032] In addition, the terms "first", "second", etc. in the description and claims of this application or the above accompanying drawings are used to distinguish different objects and are not used to describe a specific order, and may explicitly or implicitly include one or more of such features.
[0033] In the description of this application, unless otherwise specified, "a plurality" means two or more (including two), and similarly, "multiple groups" means two or more groups (including two groups).
[0034] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "linked" should be understood in a broad sense. For example, the "connection" or "link" of a mechanical structure may refer to a physical connection. For example, a physical connection may be a fixed connection, such as a fixed connection through a fixing member, such as a screw, bolt, or other fixing member; a physical connection may also be a detachable connection, such as a snap connection or a snap-fit connection; a physical connection may also be an integral connection, such as a connection formed by welding, bonding, or integral molding. The "connection" or "link" of a circuit structure may refer to not only a physical connection but also an electrical connection or a signal connection. For example, it may be a direct connection, that is, a physical connection, or it may be indirectly connected through at least one intermediate element, as long as the circuit is connected, and it may also be a connection inside two components; a signal connection may refer to not only a signal connection through a circuit but also a signal connection through a media medium, such as radio waves. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.
[0035] Figure 1 Schematic diagram of the structure of a food heating system based on radio frequency and microwave provided by some embodiments of the present application when the front wall is removed. Figure 2 Schematic diagram of the structure in which a ferrite is embedded in a ceramic plate provided by some embodiments of the present application. Refer to Figure 1 and Figure 2 As shown in FIGS. and, a food heating system based on radio frequency and microwave provided by the present application may include: a ceramic plate 01, a radio frequency generator, a phased array antenna array, and a processor. The phased array antenna array is connected to the radio frequency generator, and the phased array antenna array is also connected to the processor.
[0036] In practical applications, a food heating system based on radio frequency and microwave provided by the present application may further include a box body 02. The ceramic plate 01 is arranged in the box body 02 through a support column 023. A receiving cavity 03 is provided on the bottom wall 021 of the box body 02. The radio frequency generator, the phased array antenna array, and the processor are all arranged in the receiving cavity 03.
[0037] A ferrite 011 is embedded in the ceramic plate 01. The ceramic plate 01 is used to place food. The radio frequency generator is located below the ceramic plate 01 and is used to emit a first radio frequency microwave signal. The processor is used to obtain the placement position of the food and send a control signal to the phased array antenna array according to the placement position. The control signal is used to control the phased array antenna array to transmit and process the first radio frequency microwave signal. The phased array antenna array is used to receive the control signal, transmit and process the first radio frequency microwave signal according to the control signal, and use the second radio frequency microwave signal to heat the food. Among them, the second radio frequency microwave signal is a signal output after the first radio frequency microwave signal is transmitted and processed by the phased array antenna array.
[0038] The ferrite 011 is used to confine the second radio frequency microwave signal within the first space a, where the first space a refers to the area formed above the ceramic plate 01.
[0039] In the embodiments of the present application, through the provided processor and phased array antenna array, the first radio frequency microwave signal emitted by the radio frequency generator can be transmitted and processed according to the placement position of the food and then output the second radio frequency microwave signal, which is used to heat the food. In this way, the microwave heating method provided by the present application can accurately control the energy absorbed by the food according to the placement position of the food, improve the heating efficiency, and at the same time avoid local overheating or insufficient heating of the food, which affects the heating effect. Moreover, in the ceramic plate 01 of the present application, a ferrite 011 is embedded, and the ferrite 011 can further absorb the second radio frequency microwave signal and convert the absorbed second radio frequency microwave signal into heat energy to heat the food. The high magnetic permeability of the ferrite 011 can make the second radio frequency microwave signal satisfy the magnetic boundary condition on the surface of the ferrite 011, forcing the magnetic field lines to concentrate in the area near the ferrite 011 and preventing the second radio frequency microwave signal from escaping outside the first space a, further improving the heating efficiency.
[0040] In some embodiments, a food heating system based on radio frequency microwave provided by the embodiments of the present application further includes a position detection module. For example, the position detection module can be arranged on the upper wall 022 of the box body 02 facing the ceramic plate 01. The ceramic plate 01 includes a central heating area b, a left heating area c, and a right heating area d. The position detection module is used to detect the placement position of the food and send the placement position to the processor, and the placement position refers to which area of the ceramic plate 01 the food is located in.
[0041] In some embodiments, Figure 3 It is a schematic diagram of the positional relationship among the ceramic plate, the first antenna unit, and the second antenna unit provided by some embodiments of the present application. Refer to Figure 3 The phased array antenna array includes a first antenna unit 04 and a second antenna unit 05. The first antenna unit 04 is located below the left heating area c, and the second antenna unit 05 is located below the right heating area d. The first antenna unit 04 and the second antenna unit 05 together form an antenna array surface 06.
[0042] The processor is used to send control signals to the phased array antenna array according to the placement position, specifically including: when the processor obtains that the placement position is the central heating area b, it sends a first control signal to the phased array antenna array, and the first control signal is used to control the second RF microwave signals output by the first antenna unit 04 and the second antenna unit 05 without phase shift. When the processor obtains that the placement position is the left heating area c, it sends a second control signal to the phased array antenna array, and the second control signal is used to control the second RF microwave signal output by the first antenna unit 04 to be delayed with respect to the second RF microwave signal output by the second antenna unit 05. When the processor obtains that the placement position is the right heating area d, it sends a third control signal to the phased array antenna array, and the third control signal is used to control the second RF microwave signal output by the first antenna unit 04 to be advanced with respect to the second RF microwave signal output by the second antenna unit 05.
[0043] It should be noted that in this embodiment, the second RF microwave signal output after the first RF microwave signal is transmitted and processed by the phased array antenna array includes the second RF microwave signal output by the first antenna unit 04 and the second RF microwave signal output by the second antenna unit 05.
[0044] It should be noted that the embodiment of the present application does not limit the number of antenna units, and those skilled in the art can set it according to actual needs. For example, the phased array antenna array can include the first antenna unit 04, the second antenna unit 05, the third antenna unit, and the fourth antenna unit. The first antenna unit 04 and the third antenna unit are located below the left heating area c, and the second antenna unit 05 and the fourth antenna unit are located below the right heating area d. The first antenna unit 04, the second antenna unit 05, the third antenna unit, and the fourth antenna unit together form an antenna array surface 06, and the first antenna unit 04, the second antenna unit 05, the third antenna unit, and the fourth antenna unit form a 2*2 antenna array on the antenna array surface 06.
[0045] The processor is used to send control signals to the phased array antenna array according to the placement position, specifically including: when the processor obtains that the placement position is the central heating area b, it sends a first control signal to the phased array antenna array, and the first control signal is used to control the second radio frequency microwave signals output by the first antenna unit 04, the second antenna unit 05, the third antenna unit and the fourth antenna unit without phase shift. When the processor obtains that the placement position is the left heating area c, it sends a second control signal to the phased array antenna array, and the second control signal is used to control the second radio frequency microwave signals output by the first antenna unit 04 and the third antenna unit to be delayed with respect to the second radio frequency microwave signals output by the second antenna unit 05 and the fourth antenna unit. When the processor obtains that the placement position is the right heating area d, it sends a third control signal to the phased array antenna array, and the third control signal is used to control the second radio frequency microwave signals output by the first antenna unit 04 and the third antenna unit to be advanced with respect to the second radio frequency microwave signals output by the second antenna unit 05 and the fourth antenna unit.
[0046] In this embodiment, Figure 4 is a schematic diagram of the second radio frequency microwave signal concentrated in the central heating area provided by some embodiments of the present application. Refer to Figure 4 , when the processor obtains that the placement position is the central heating area b, the first control signal controls the second radio frequency microwave signals output by the first antenna unit 04 and the second antenna unit 05 without phase shift, so that the second radio frequency microwave signal is concentrated in the central heating area b. Figure 5 is a schematic diagram of the second radio frequency microwave signal concentrated in the left heating area provided by some embodiments of the present application. Refer to Figure 5 , when the processor obtains that the placement position is the left heating area c, the second control signal controls the second radio frequency microwave signal output by the first antenna unit 04 to be delayed with respect to the second radio frequency microwave signal output by the second antenna unit 05, so that the second radio frequency microwave signal is concentrated in the left heating area c. Figure 6 is a schematic diagram of the second radio frequency microwave signal concentrated in the right heating area provided by some embodiments of the present application. Refer to Figure 6 , when the processor obtains that the placement position is the right heating area d, the third control signal controls the second radio frequency microwave signal output by the first antenna unit 04 to be advanced with respect to the second radio frequency microwave signal output by the second antenna unit 05, so that the second radio frequency microwave signal is concentrated in the right heating area d.
[0047] In some embodiments, the ceramic plate 01 can be square, circular or oval, etc. Refer to Figure 2 , the ceramic plate 01 is square, and a plurality of ferrites 011 are embedded in the ceramic plate 01. The number of ferrites 011 embedded in the left heating area c and the right heating area d is more than the number of ferrites 011 embedded in the central heating area b.
[0048] In this way, the escape of the second radio frequency microwave signal to the outside of the first space a can be further prevented, improving the heating efficiency.
[0049] In some embodiments, referring to Figure 2 , the number of ferrite 011 embedded in the part of the left heating area c far from the central heating area b is more than the number of ferrite 011 embedded in the part of the left heating area c close to the central heating area b. The number of ferrite 011 embedded in the part of the right heating area d far from the central heating area b is more than the number of ferrite 011 embedded in the part of the right heating area d close to the central heating area b. That is, the ferrite 011 embedded at the edge of the ceramic plate 01 is denser than the rest of the ceramic plate 01.
[0050] In some embodiments, the antennas in the first antenna unit 04 and the second antenna unit 05 are both directional antennas.
[0051] In this way, the second radio frequency microwave signal can be restricted within a certain angle, so that the second radio frequency microwave signal can be more concentrated in the food heating area.
[0052] In some embodiments, the phased array antenna array further includes a phase shifter and a power amplifier. The radio frequency generator, the phase shifter and the power amplifier are connected in sequence. The phase shifter is used to control the phase relationship between the second radio frequency microwave signal output by the first antenna unit and the second radio frequency microwave signal output by the second antenna unit. The power amplifier is used to amplify the first radio frequency microwave signal. For example, the power amplifier can be made of gallium nitride-based or silicon-based materials.
[0053] Another embodiment of the present application further provides a method for heating food based on radio frequency microwave, Figure 7 which is a flowchart of a method for heating food based on radio frequency microwave provided by the embodiments of the present application.
[0054] As Figure 7 shown, the method for heating food based on radio frequency microwave provided by the embodiments of the present application includes the following steps 701 to 705:
[0055] Step 701, embed ferrite in the ceramic plate, and place food on the ceramic plate.
[0056] Step 702, place the radio frequency generator under the ceramic plate, and the radio frequency generator emits the first radio frequency microwave signal.
[0057] Step 703, connect the phased array antenna array to the radio frequency generator, and connect the phased array antenna array to the processor.
[0058] In step 704, the processor obtains the placement position of the food and sends a control signal to the phased array antenna array according to the placement position. The control signal controls the phased array antenna array to transmit and process the first radio frequency microwave signal.
[0059] In step 705, the phased array antenna array receives the control signal, transmits and processes the first radio frequency microwave signal according to the control signal, and heats the food through the second radio frequency microwave signal.
[0060] Wherein, the second radio frequency microwave signal is a signal output after the first radio frequency microwave signal is transmitted and processed by the phased array antenna array.
[0061] In some embodiments, a food heating method based on radio frequency microwave provided by an embodiment of the present application further includes: a position detection module detects the placement position of the food and sends the placement position to the processor. Wherein, the placement position refers to which area of the ceramic plate the food is located in.
[0062] The food heating method based on radio frequency microwave provided by this embodiment can accurately control the energy absorbed by the food according to the placement position of the food, improve the heating efficiency, and at the same time avoid local overheating or insufficient heating of the food, which affects the heating effect. Moreover, a ferrite is embedded in the ceramic plate, and the ferrite can further absorb the second radio frequency microwave signal, convert the absorbed second radio frequency microwave signal into heat energy to heat the food, and prevent the second radio frequency microwave signal from escaping outside the first space, further improving the heating efficiency.
[0063] Those skilled in the art can understand that although some embodiments herein include certain features included in other embodiments, the combination of features of different embodiments means that it is within the scope of the present application and forms different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.
[0064] As mentioned above, the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. A food heating system based on radio frequency and microwave, characterized in that, The system includes: a ceramic plate, a radio frequency generator, a phased array antenna array, and a processor; A ferrite is embedded in the ceramic plate, and the ceramic plate is used for placing food; The radio frequency generator is located below the ceramic plate, and the radio frequency generator is used for emitting a first radio frequency microwave signal; The phased array antenna array is connected to the radio frequency generator, and the phased array antenna array is also connected to the processor; The processor is used for obtaining the placement position of the food, and sending a control signal to the phased array antenna array according to the placement position, and the control signal is used for controlling the phased array antenna array to transmit and process the first radio frequency microwave signal; The phased array antenna array is used for receiving the control signal, and transmitting and processing the first radio frequency microwave signal according to the control signal, and using a second radio frequency microwave signal to heat the food, wherein the second radio frequency microwave signal is a signal output after the first radio frequency microwave signal is transmitted and processed by the phased array antenna array; The ferrite is used for restricting the second radio frequency microwave signal within a first space, wherein the first space refers to the area formed above the ceramic plate and the ceramic plate; 2. The system according to claim 1, wherein The system further includes a position detection module. The ceramic plate includes a central heating area, a left heating area, and a right heating area. The position detection module is used for detecting the placement position of the food and sending the placement position to the processor, and the placement position refers to which area of the ceramic plate the food is located in; 3. The system according to claim 2, wherein The phased array antenna array includes a first antenna unit and a second antenna unit. The first antenna unit is located below the left heating area, and the second antenna unit is located below the right heating area; The processor is used for sending a control signal to the phased array antenna array according to the placement position, specifically including: When the processor obtains that the placement position is the central heating area, sending a first control signal to the phased array antenna array, and the first control signal is used for controlling the second radio frequency microwave signals output by the first antenna unit and the second antenna unit to have no phase shift; When the processor obtains that the placement position is the left heating area, sending a second control signal to the phased array antenna array, and the second control signal is used for controlling the second radio frequency microwave signal output by the first antenna unit to be delayed from the second radio frequency microwave signal output by the second antenna unit; When the processor obtains that the placement position is the right heating area, sending a third control signal to the phased array antenna array, and the third control signal is used for controlling the second radio frequency microwave signal output by the first antenna unit to be advanced from the second radio frequency microwave signal output by the second antenna unit.
4. The system according to claim 2, wherein A plurality of ferrites are embedded in the ceramic plate, and the number of ferrites embedded in the left heating area and the right heating area is more than the number of ferrites embedded in the central heating area.
5. The system according to claim 4, characterized in that, The number of ferrite cores embedded in the part of the left heating area far from the central heating area is greater than the number of ferrite cores embedded in the part of the left heating area close to the central heating area.
6. The system according to claim 3, wherein The antennas in the first antenna unit and the second antenna unit are all directional antennas.
7. The system according to claim 3, wherein The phased array antenna array further includes a phase shifter and a power amplifier; The radio frequency generator, the phase shifter, and the power amplifier are connected in sequence; The phase shifter is used to control the phase relationship between the second radio frequency microwave signal output by the first antenna unit and the second radio frequency microwave signal output by the second antenna unit; The power amplifier is used to amplify the first radio frequency microwave signal.
8. The system according to claim 1, wherein The system further includes a box body, the ceramic plate is arranged in the box body, a receiving cavity is arranged on the bottom wall of the box body, and the radio frequency generator, the phased array antenna array, and the processor are arranged in the receiving cavity.
9. A food heating method based on radio frequency microwave, which is applied to the food heating system based on radio frequency microwave according to any one of claims 1 to 8, and is characterized in that, The method includes: Embedding ferrite cores in the ceramic plate on which food is placed; Arranging the radio frequency generator below the ceramic plate, and the radio frequency generator emits a first radio frequency microwave signal; Connecting the phased array antenna array to the radio frequency generator and connecting the phased array antenna array to the processor; The processor obtains the placement position of the food and sends a control signal to the phased array antenna array according to the placement position, and the control signal controls the phased array antenna array to transmit and process the first radio frequency microwave signal; The phased array antenna array receives the control signal, transmits and processes the first radio frequency microwave signal according to the control signal, and heats the food through a second radio frequency microwave signal, where the second radio frequency microwave signal is the signal output after the first radio frequency microwave signal is transmitted and processed by the phased array antenna array.
10. The method according to claim 9, characterized in that, The method further includes: The position detection module detects the placement position of the food and sends the placement position to the processor, and the placement position refers to which area of the ceramic plate the food is located in.