Aerosol generating device, and method for controlling heating of aerosol generating device

Abstract

An aerosol generating device, and a method for controlling heating of the aerosol generating device. The aerosol generating device comprises a radio frequency source, and a power supply and a radio frequency heating assembly both connected to the radio frequency source. The power supply is used for providing a direct current signal to the radio frequency source. The radio frequency source is used for converting the received direct current signal into an electromagnetic wave signal and transmitting the electromagnetic wave signal to the radio frequency heating assembly. The radio frequency heating assembly comprises a radio frequency radiator (1) in which a resonant cavity (13) is formed and a transmission connector (3) mounted on the radio frequency radiator (1). The transmission connector (3) is used for receiving the electromagnetic wave signal to cause the resonant cavity (13) to generate resonance. A coaxial accommodating cavity (131) is further formed in the resonant cavity (13). The accommodating cavity (131) is used for accommodating a medium to be heated (5). A notch (14) is formed on the radio frequency radiator (1). The notch (14) is in communication with the resonant cavity (13) and is arranged on the outer side of the accommodating cavity (131) in an annular configuration.

Description

An aerosol generating device and a method for controlling the heating of the aerosol generating device.

[0001] This application claims priority to Chinese Patent Application No. 202410578822.1, filed on May 8, 2024, entitled "An Aerosol Generating Device and a Control Method for Heating an Aerosol Generating Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application belongs to the field of radio frequency microwave technology, and particularly relates to an aerosol generating device and a method for controlling the heating of the aerosol generating device. Background Technology

[0003] An aerosol generating device is a device that forms an aerosol from a stored atomizable medium through heating or ultrasound. Microwave heating, as a novel heating technology, typically involves microwaves fed in from one end and then resonating with a radio frequency heating element. Its rapid heating speed has attracted widespread attention.

[0004] However, microwave heating devices in related technologies typically use a 1 / 4 wavelength microwave resonant cavity to deliver microwave energy into the aerosol matrix through an inner conductor pin. Because the electric field strength in the resonant cavity is concentrated at the tip of the inner conductor pin, the electric field distribution is not reasonable, resulting in low heat generation efficiency.

[0005] Summary of the Invention

[0006] The technical problem to be solved by this application is to provide an aerosol generating device and a method for controlling the heating of the aerosol generating device, which aims to solve the problem of low heat generation efficiency of aerosol generating devices in related technologies.

[0007] To achieve the above objectives, the technical solutions adopted in the embodiments of this application are as follows:

[0008] In a first aspect, embodiments of this application provide an aerosol generating device, including a radio frequency (RF) source, a power supply connected to the RF source, and an RF heating component. The power supply provides a DC signal to the RF source; the RF source converts the received DC signal into an electromagnetic wave signal and transmits the electromagnetic wave signal to the RF heating component; wherein...

[0009] The radio frequency heating assembly includes a radio frequency radiator with a resonant cavity, a transmission connector mounted on the radio frequency radiator, the transmission connector being used to receive electromagnetic wave signals to cause the resonant cavity to resonate; a coaxial receiving cavity is also provided inside the resonant cavity, the receiving cavity being used to receive the heated medium; the radio frequency radiator has a notch, the notch connecting to the resonant cavity and surrounding the outside of the receiving cavity.

[0010] Secondly, embodiments of this application also provide a control method for heating an aerosol generating device, applied to an aerosol generating device, wherein the aerosol generating device includes a radio frequency (RF) source, a power supply connected to the RF source, and an RF heating component, wherein the power supply provides a DC signal to the RF source; the RF source converts the received DC signal into an electromagnetic wave signal and transmits the electromagnetic wave signal to the RF heating component; wherein...

[0011] The radio frequency heating assembly includes a radio frequency radiator with a resonant cavity and a transmission connector mounted on the radio frequency radiator. The transmission connector is used to receive the electromagnetic wave signal to cause the resonant cavity to resonate. A coaxial receiving cavity is also provided within the resonant cavity for receiving the heated medium. The radio frequency radiator has a notch that communicates with the resonant cavity and surrounds the outside of the receiving cavity. The control method includes:

[0012] When the heated medium is detected to be inserted into the containment cavity, the control power supply sends a DC signal to the radio frequency source.

[0013] The radio frequency source converts the received DC signal into an electromagnetic wave signal and transmits the electromagnetic wave signal to the radio frequency heating component;

[0014] The radio frequency heating component generates a corresponding high-frequency electromagnetic field according to the electromagnetic wave signal; wherein, the high-frequency electromagnetic field is used to heat the heated medium and cause the heated medium to generate an aerosol.

[0015] Compared with the prior art, the advantages of the aerosol generating device and the heating control method of the aerosol generating device in this application are as follows:

[0016] The radio frequency radiating body of this application is provided with a housing cavity and a coaxial resonant cavity of the housing cavity. A notch is also provided on the outer periphery of the housing cavity. The presence of the notch can concentrate the electromagnetic field generated by the resonance into the cavity, thereby enabling concentrated heating of the heated medium and resulting in high heat generation efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 is a schematic diagram of the aerosol generating device in Embodiment 1 of this application;

[0019] Figure 2 is a schematic diagram of the overall structure of the radio frequency heating component in the first embodiment of this application;

[0020] Figure 3 is a schematic diagram of the overall structure of the radio frequency heating component in the first embodiment of this application;

[0021] Figure 4 is a partial structural schematic diagram of the radio frequency heating component in Embodiment 1 of this application from a top view.

[0022] Figure 5 is a graph showing the relationship between the return loss of the heated medium and the resonant frequency in Embodiment 1 of this application;

[0023] Figure 6 is a basic flowchart of the control method for heating the aerosol generating device in Embodiment 2 of this application.

[0024] In the accompanying drawings, the labels in Figures 2-4 represent: 1. Radio frequency radiator; 11. First conductor; 12. Second conductor; 121. Inner cylinder; 122. Connecting part; 123. Outer cylinder; 13. Resonant cavity; 131. Receiving cavity; 14. Notch; 15. Fixing member; 2. Dielectric; 21. Filling matrix; 3. Transmission connector; 31. Antenna structure; 4. Adjustment assembly; 5. Heated medium. Detailed Implementation

[0025] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0026] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0028] Example 1:

[0029] As shown in Figures 1-5, in this embodiment, the aerosol generating device includes a radio frequency (RF) source, a power supply connected to the RF source, and an RF heating component. The power supply provides a DC signal to the RF source. The RF source converts the received DC signal into an electromagnetic wave signal and transmits the electromagnetic wave signal to the RF heating component. The RF heating component includes an RF radiator 1 with a resonant cavity 13 and a transmission connector 3 mounted on the RF radiator 1. The transmission connector 3 receives the electromagnetic wave signal to make the resonant cavity 13 resonate. A coaxial receiving cavity 131 is also provided inside the resonant cavity 13. The receiving cavity 131 is used to receive the heated medium 5. The RF radiator 1 has a notch 14 that connects to the resonant cavity 13 and surrounds the outside of the receiving cavity 131.

[0030] Specifically, the radio frequency radiator 1 is provided with a receiving cavity 131 and a coaxial resonant cavity 13 within the receiving cavity 131. A notch 14 is also provided on the outer periphery of the receiving cavity 131. The presence of the notch 14 can concentrate the electromagnetic field generated by the resonance within the cavity, thereby enabling concentrated heating of the heated medium 5 with high heat generation efficiency. The power supply can provide power to the aerosol generation device; the radio frequency source can generate a stable output high-power electromagnetic wave signal (i.e., the aforementioned electromagnetic wave signal) in a preset radio frequency band through the DC signal of the power supply, and send the electromagnetic wave signal to the radio frequency heating component. During operation, the connection between the power supply and the radio frequency source is made conductive, and the DC signal is converted into a high-power radio frequency band electromagnetic wave signal through the radio frequency source; the high-power radio frequency band electromagnetic wave signal is input to the antenna structure 31; the antenna structure 31 can couple with the radio frequency radiator 1 to generate an electromagnetic field distribution in the heated medium 5; the high-frequency electromagnetic field, based on the dielectric heating principle, enables the heated medium 5 to generate heat and produce aerosol within 0.5 to 1 second.

[0031] In this embodiment, the radio frequency heating assembly further includes an adjustment assembly 4 mounted on the radio frequency radiator 1. The adjustment assembly 4 is used to adjust the relative position of the heated medium 5 and the receiving cavity 131. That is, the radio frequency heating assembly is provided with the adjustment assembly 4, which can adjust the relative position of the heated medium 5 and the resonant cavity 13, so that different parts of the heated medium 5 can be heated in turn in the heat-concentrated area within the resonant cavity 13, resulting in more uniform heating and higher heat generation efficiency. It is understood that in some specific embodiments, the adjustment assembly 4 can be a manually controlled adjustment assembly 4 or an automated adjustment assembly 4 controlled by a terminal processor, and no limitation is made here. The adjustment assembly 4 includes a platform disposed at the bottom of the receiving cavity 131, a gear assembly connected to the bottom of the platform, and a motor connected to the gear assembly. The platform is used to support the heated medium 5 and to allow relative movement between the heated medium 5 and the receiving cavity 131. When the adjustment assembly 4 is working, the motor is started to drive the gears in the gear assembly to rotate, thereby driving the platform to move up and down, thereby realizing the position adjustment of the heated medium 5. Of course, in some other embodiments, the adjustment component 4 may also use a sprocket mechanism as the driven component, and the sprocket mechanism is rotated by a motor to drive the table to rise and move. There is no limitation here.

[0032] In this embodiment, a temperature sensor can also be installed within the radio frequency heating assembly, i.e., a temperature sensor is installed on the radio frequency radiator 1. The temperature sensor can collect the temperature value of the heated medium 5 within the resonant cavity 13. Specifically, it can also collect the temperature value of the heated medium 5, thereby determining the degree of heat dissipation after heating the heated medium 5, and thus determining whether the position of the heated medium 5 needs to be adjusted based on the degree of heat dissipation. When the position adjustment conditions are met, the adjustment assembly 4 can be controlled to move the heated medium 5, so that the main heating area of ​​the heated medium 5 changes from the current heating segment to another heating segment, thereby heating the other heating segment, thus achieving uniform segmented heating and high heating efficiency. It should be noted that the current heating segment may or may not be adjacent to other heating segments; the current heating segment refers to the area where the heated medium 5 is located when it is in its current position, which happens to be an area where microwave energy (electromagnetic field strength) is concentrated, enabling rapid heat generation. In actual implementation, other parts of the heated medium 5 can also be heated to a certain extent. It is understood that in some specific implementations, multiple heating sections can be divided along the axial direction of the heated medium 5, such as two, three, four, five, etc., without limitation; heating one heating section at a time will result in better heating effect.

[0033] In this embodiment, the resonant cavity 13 further includes an outer cavity located around the periphery of the receiving cavity 131. The radio frequency radiator 1 includes a first conductor 11 and a second conductor 12, which together define the receiving cavity 131 and the outer cavity. A notch 14 is formed between the second conductor 12 and the first conductor 11, and is located outside the receiving cavity 131 within the resonant cavity 13. Specifically, the first conductor 11 and the second conductor 12 can be either a radiator or a zero potential reference. The notch 14 formed between the first conductor 11 and the second conductor 12 can concentrate the electromagnetic field distribution. The first conductor 11 is fixed inside the resonant cavity 13, and the second conductor 12 is an enclosing shell structure. The shell structure formed by the second conductor 12 can confine the high-frequency electromagnetic field within the target heating area of ​​the resonant cavity 13; that is, the notch 14 is located inside the resonant cavity 13, which can confine all the generated high-frequency electromagnetic field within the resonant cavity 13 and couple it with the heated medium 5, greatly improving the heating efficiency. The outer cylinder 123, connecting part 122, and inner cylinder 121 are integrally formed, resulting in low manufacturing and processing costs. In this embodiment, the transmission connector 3 is also connected to an antenna structure 31. The antenna structure 31 is used to transmit the radio frequency signal received by the transmission connector 3 to the first conductor 11 or the second conductor 12, that is, to transmit the radio frequency signal to the radiator. The transmission connector 3 can be an SMA connector, used to connect the radio frequency source and the antenna structure 31, so that the high-frequency electromagnetic energy emitted by the radio frequency source reaches the first conductor 11 or the second conductor 12. The transmission connector 3 can be connected to the bottom side or the outer periphery of the radio frequency radiator 1, without limitation.

[0034] Figure 2 shows the first embodiment, in which the first conductor 11 serves as a zero potential reference and the second conductor 12 serves as a radiator. The antenna structure 31 is connected to the second conductor 12. The radio frequency signal emitted by the radio frequency source can be transmitted to the second conductor 12 through the antenna structure 31 and coupled with it, thereby generating an electromagnetic field distribution in the heated medium 5 within the resonant cavity 13. Thus, the high-frequency electromagnetic field can rapidly generate heat and produce aerosol in the heated medium 5 within 0.5 to 1 second based on the dielectric heating principle. The heat generation is fast and the heating efficiency is high.

[0035] Figure 3 shows the second embodiment, in which the first conductor 11 serves as a radiator and the second conductor 12 serves as a zero potential reference. The antenna structure 31 is connected to the first conductor 11. The radio frequency signal emitted by the radio frequency source can be transmitted to the first conductor 11 through the antenna structure 31 and coupled with it, thereby generating an electromagnetic field distribution in the heated medium 5 within the resonant cavity 13. Thus, the high-frequency electromagnetic field can rapidly generate heat in the heated medium 5 and produce an aerosol based on the dielectric heating principle.

[0036] Furthermore, in this embodiment, the first conductor 11 is fixed inside the resonant cavity 13; the second conductor 12 includes an outer cylinder 123, a connecting portion 122 connected to the top of the outer cylinder 123 and extending inward, and an inner cylinder 121 extending from the inner edge of the connecting portion 122 towards the bottom. The inner cylinder 121 and the first conductor 11 together form an isolation wall separating the receiving cavity 131 and the outer cavity in the resonant cavity 13, and a notch 14 is formed between the first conductor 11 and the inner cylinder 121.

[0037] Specifically, the inner cylinder 121 and the first conductor 11 are spaced apart and directly opposite each other in the resonant cavity 13, thus forming a gap 14; this allows the first conductor 11 and the second conductor 12 to enclose and form a resonant cavity 13 with two chambers, namely, an inner cavity (receiving cavity 131) and an outer cavity; a structure similar to a capacitor is formed between the first conductor 11 and the inner cylinder 121, which can generate a high-frequency electromagnetic field in the resonant cavity 13 to heat the heated medium 5; this arrangement can confine the generated electromagnetic field entirely within the second conductor 12, resulting in a better heating effect compared to the traditional open-circuit structure.

[0038] In this embodiment, the notch 14 is used to concentrate microwave energy and provide capacitance to the resonant cavity 13. When the radio frequency heating assembly is working, the electromagnetic field intensity in the resonant cavity 13 gradually decreases from the area where the notch 14 is located to the surrounding area. That is, the microwave energy is mainly concentrated around the notch 14, which can achieve radial zone heating. The notch 14 itself can also provide a certain amount of additional capacitance to the resonant cavity 13. When the overall capacitance in the resonant cavity 13 increases, the size of the resonant cavity 13 can be appropriately reduced, and the resonant frequency of the resonant cavity 13 can still be kept within a reasonable range. It can be seen that the radio frequency heating assembly of this embodiment can not only better constrain the electromagnetic energy within the required heating range, but also make the size of the resonant cavity 13 smaller. The capacitance provided by the notch 14 to the resonant cavity 13 and the width of the notch 14 satisfy the following formula:

[0039] Where C represents the capacitance provided by the notch 14 to the resonant cavity 13, k represents the edge effect-higher-order mode weighting coefficient, ε0 represents the vacuum dielectric constant, R1 represents the distance from the axis of the housing cavity 131 to the inner side of the isolation wall, R2 represents the distance from the axis of the housing cavity 131 to the outer side of the isolation wall, and d represents the width of the notch 14.

[0040] In this embodiment, at least three uniformly distributed dielectric bodies 2 are disposed within the outer cavity. The dielectric bodies 2 are used to provide capacitance for the resonant cavity 13. A cavity may also be disposed within the dielectric bodies 2. The dielectric bodies 2 can be cylindrical components made of high dielectric material, which can provide additional capacitance for the resonant cavity 13. Due to the presence of the dielectric bodies 2, while maintaining good heating performance of the RF heating component, the size of the RF radiator 1 can be further reduced, making the device more exquisite and compact, and better meeting the diverse aesthetic and portability needs of users.

[0041] Furthermore, in this embodiment, the resonant frequency of the resonant cavity 13 satisfies the following formula:

[0042] Among them, f r L represents the resonant frequency; L′ represents the inductance, which is related to the size of the resonant cavity 13; C1 represents the capacitance provided by the notch 14 to the resonant cavity 13; C2 represents the sum of the capacitances provided by each dielectric 2 to the resonant cavity. It can be seen that the presence of each dielectric 2 and the notch 14 increases the capacitance within the resonant cavity 13. Even with a smaller size, the resonant frequency of the resonant cavity 13 can still be maintained at a reasonable level. Figure 5 shows the relationship between the return loss of the heated medium 5 and the resonant frequency. In the range of 0.5–10 GHz, this heterogeneous capacitor-like coaxial resonant cavity configuration exhibits the characteristics of reducing size and providing a good resonant frequency. Through this method, the length of the resonant cavity 13 can be controlled between 2 and 10 mm, resulting in a compact and exquisite device that better meets the diverse aesthetic and portability needs of users.

[0043] In this embodiment, the cavity of the dielectric 2 can be filled with a matrix or air. That is, the cavity can be a dielectric cavity containing only air. With this configuration, even if the size of the resonant cavity 13 is reduced to a certain extent, the resonant cavity 13 can still maintain a suitable resonant frequency. The filling matrix can be a high-dielectric material or a material with high specific heat capacity and high dielectric constant. It is understood that in actual implementation, whether to add a filling matrix and how much filling medium to add can be determined based on factors such as the system RF signal magnitude and simulation conditions, and are not limited here.

[0044] Furthermore, in this embodiment, the filling matrix is ​​a metal oxide or an alloy of metal oxides. Metal oxides have a high dielectric constant, which increases the capacitance of the dielectric 2. This configuration ensures excellent heating performance of the RF heating component while reducing its size. Further, the metal oxide can be one of Al2O3, HfO2, ZrO2, La2O3, TiO2, and Ta2O5. Of course, in some specific embodiments, the metal oxide filling each cavity can be any combination of two or more of Al2O3, HfO2, ZrO2, La2O3, TiO2, and Ta2O5, without limitation. The cross-sectional shape of the cavity in the axial direction is one of circular, elliptical, or polygonal, preferably circular, that is, the dielectric 2 is cylindrical. Of course, in some embodiments, the cross-sectional shape of the cavity in the axial direction can also be triangular, quadrilateral, etc., without limitation.

[0045] In this embodiment, the heated medium 5 can be a cylinder or a hollow cylinder, resulting in a simple overall structure. Preferably, the heated medium 5 is a hollow cylinder, inside which a dielectric material can be placed. Simultaneously, the heated medium 5 also serves as a matrix for aerosol generation, enabling self-heating and aerosol generation within an electromagnetic field. Specifically, the heated medium 5 acts as the load for the radio frequency aerosol generating device, forming an integrated system with the coupled radio frequency radiator, allowing the resonant cavity 13 to have a suitable resonant frequency and rapidly and uniformly generate aerosols. Furthermore, corresponding to the shape of the heated medium 5, the dielectrics 2 can be symmetrically distributed, and / or arranged in a ring shape. This facilitates the formation of the desired electromagnetic field within the resonant cavity 13. In this embodiment, the heated medium 5 is a hollow cylinder, and correspondingly, the dielectrics 2 are arranged in a ring shape.

[0046] In this embodiment, the radio frequency radiator 1 is a metal component with good conductivity, capable of receiving and coupling with the radio frequency signal from the antenna structure 31. Furthermore, the metal component can be one of copper, aluminum, silver, or gold. Copper or aluminum is preferred due to their good conductivity and low cost. Of course, in other embodiments, other materials with high conductivity, such as iron, tin, or tungsten, can also be used; this is not a limitation.

[0047] In this embodiment, a fixing member 15 is also provided on the side of the isolation wall facing the receiving cavity 131. The fixing member 15, the inner cylinder 121, and the first conductor 11 are coaxially arranged. Specifically, a limiting groove is formed on the inner side of the isolation wall, and the fixing member 15 is embedded in the limiting groove. The receiving cavity 131 is formed by the isolation wall and the fixing member together. The fixing member 15, the first conductor 11, and the inner cylinder 121 are coaxially arranged. The limiting groove includes grooves respectively formed on the first conductor 11 and the inner cylinder 121. One end of the fixing member 15 is fixed in conjunction with the groove on the first conductor 11, and the other end is fixed in conjunction with the groove on the inner cylinder 121. The presence of the fixing member 15 can stabilize the heated medium 5 and ensure stable heat transfer in the resonant cavity 13 during the heating process, thereby ensuring the stability of the resonant frequency. The fastener 15 can be made of materials that are resistant to high temperatures and have low dielectric loss, such as ceramic, PEEK, PI, PTFE, or quartz glass. Alternatively, it can be made of dielectric substrate materials such as Rogers or FR- to provide additional capacitance and further reduce the physical size of the RF heating component.

[0048] Example 2:

[0049] As shown in Figure 6, the heating control method for the aerosol generating device, applied to the aerosol generating device described in Example 1, includes the following steps:

[0050] Step S1: When the heated medium is detected to be inserted into the receiving cavity, the control power supply sends a DC signal to the radio frequency source.

[0051] Specifically, the aerosol generating device can also be equipped with a sensor to detect whether the heated medium is properly inserted into the receiving cavity. The power is only activated when proper insertion is confirmed. It is understood that in some other embodiments, the power can also be manually activated directly after the heated medium is inserted into the receiving cavity.

[0052] Step S2: The radio frequency source converts the received DC signal into an electromagnetic wave signal and transmits the electromagnetic wave signal to the radio frequency heating component.

[0053] Specifically, an RF source can convert the DC signal from a power source into a stable, high-power RF electromagnetic wave signal.

[0054] Step S3: The radio frequency heating component generates a corresponding high-frequency electromagnetic field based on the electromagnetic wave signal.

[0055] Specifically, high-frequency electromagnetic fields are used to heat the medium being heated and to generate aerosols within it. That is, high-power radio frequency electromagnetic wave signals received can be input into the antenna structure of the radio frequency heating component; the antenna structure can couple with the radio frequency radiator, generating an electromagnetic field distribution within the heated medium. Based on the dielectric heating principle, the high-frequency electromagnetic field enables the heated medium to rapidly generate heat and produce aerosols, resulting in high heat generation efficiency.

[0056] In some embodiments, after step S3 above, step S4 is also included: after the single heating action of the radio frequency heating component stops, the temperature value of the heated medium is monitored; if the temperature value falls within a preset temperature range, an adjustment command for controlling the operation of the radio frequency heating component is generated.

[0057] Specifically, the adjustment command instructs the radio frequency (RF) heating component to adjust the position of the heated medium within the RF radiator, causing the main heating area of ​​the heated medium to shift from the current heating segment to another heating segment. The current heating segment may or may not be adjacent to other heating segments, depending on actual needs. The duration of a single heating action of the RF heating component can be 0.3–1.5 seconds. The temperature value of the heated medium is collected by a temperature sensor, allowing the determination of the heat dissipation degree after heating the current heating segment. This heat dissipation degree then determines whether the position of the heated medium within the RF heating component needs adjustment. It is understood that in some specific embodiments, multiple heating segments can be divided along the axial direction of the heated medium, such as two, three, four, or five, without limitation. Focusing on heating only one segment at a time yields better heating results.

[0058] In some specific implementations, the adjustment command is used to instruct the adjustment component to operate, that is, to control the adjustment component to move the heated medium, thereby changing the main heating area of ​​the heated medium from the current heating segment to other heating segments, and then heating those other heating segments, thus achieving uniform segmented heating and high heating efficiency. The lower limit of the preset temperature range can be room temperature, and the upper limit can be a temperature that does not have a major impact on the dielectric constant of the system, for example: 25℃~50℃. When the temperature of the heated medium drops back to the preset temperature range after heating, it indicates that heating of other heating segments can continue. It should be noted that the current heating segment refers to the area where the heated medium is located at its current position (relative to the position of the radio frequency radiator), which happens to be the area where microwave energy (electromagnetic field intensity) is concentrated, enabling rapid heat generation; in actual implementation, other parts of the heated medium can also be heated to a certain extent.

[0059] Through the implementation of the above method in this embodiment, after the connection between the power supply and the radio frequency source is established, the basic power and DC signal generated by the power supply are converted into high-power radio frequency electromagnetic wave signals by the radio frequency source. The high-power radio frequency electromagnetic wave signals are then input into the antenna structure. The antenna structure can couple with the radio frequency radiator, generating an electromagnetic field distribution in the heated medium. The high-frequency electromagnetic field, based on the dielectric heating principle, enables the heated medium to generate heat and produce aerosols within 0.5 to 1 second. The temperature of the heated medium is monitored by a temperature sensor. After the temperature drops to a preset temperature range, the relative position of the heated medium and the resonant cavity can be adjusted by an adjustment component, allowing different parts of the heated medium to be heated alternately in the heat-concentrated area of ​​the resonant cavity, resulting in more uniform heating and higher heat generation efficiency.

[0060] In this embodiment, the aerosol generation method is applied to an aerosol generation device. The aerosol generation device may further include a memory, a processor, and a computer program stored in the memory and executable on the processor. The memory and the processor are communicatively connected. When the processor executes the computer program, it implements the method described in Embodiment 2. The number of processors may be one or more.

[0061] The memory can be high-speed random access memory (RAM) or non-volatile memory, such as disk storage. Memory is used to store executable program code, and the processor is coupled to the memory.

[0062] Furthermore, embodiments of this application also provide a computer-readable storage medium, which may be disposed in the aforementioned aerosol generating device.

[0063] The computer-readable storage medium stores a computer program that, when executed by a processor, implements the heating control method of the aerosol generating device described in the foregoing embodiments. Furthermore, the computer-readable storage medium can also be a USB flash drive, a portable hard drive, a read-only memory (ROM), RAM, a magnetic disk, or an optical disk, or any other medium capable of storing program code.

[0064] In the above embodiments, the descriptions of each embodiment have different focuses. Parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments. The specific parameter values ​​such as time and temperature involved in the above embodiments are merely exemplary, used for analysis and explanation of this application, and should not be construed as limiting this application. Furthermore, it should be noted that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0065] The above is a description of the aerosol generating device and the control method for heating the aerosol generating device provided in this application. For those skilled in the art, based on the ideas of the embodiments of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An aerosol generating device, comprising a radio frequency (RF) source, a power supply and an RF heating assembly respectively connected to the RF source, wherein the power supply provides a DC signal to the RF source; the RF source converts the received DC signal into an electromagnetic wave signal and transmits the electromagnetic wave signal to the RF heating assembly; wherein, The radio frequency heating assembly includes a radio frequency radiator with a resonant cavity and a transmission connector mounted on the radio frequency radiator. The transmission connector is used to receive the electromagnetic wave signal to make the resonant cavity resonate. A coaxial receiving cavity is also provided inside the resonant cavity, which is used to receive the heated medium. The radio frequency radiator has a notch that communicates with the resonant cavity and surrounds the outside of the receiving cavity.

2. The aerosol generating device according to claim 1, wherein, It also includes an adjustment assembly installed on the radio frequency radiator. The adjustment assembly includes a platform disposed at the bottom of the receiving cavity, a gear assembly connected to the bottom of the platform, and a motor connected to the gear assembly. The platform is used to carry the heated medium and to cause the heated medium to move relative to the receiving cavity.

3. The aerosol generating device according to claim 1, wherein, The resonant cavity further includes an outer cavity located on the periphery of the receiving cavity. The radio frequency radiator includes a first conductor and a second conductor, which together define the receiving cavity and the outer cavity. The notch is formed between the first conductor and the second conductor, and the notch is located outside the receiving cavity.

4. The aerosol generating apparatus according to claim 3, wherein, The first conductor is fixed inside the resonant cavity; the second conductor includes an outer cylinder, a connecting portion connected to the top of the outer cylinder and extending inward, and an inner cylinder extending from the inner edge of the connecting portion towards the bottom. The inner cylinder and the first conductor together form an isolation wall that separates the receiving cavity and the outer cavity inside the resonant cavity. The notch is formed between the first conductor and the inner cylinder.

5. The aerosol generating apparatus according to claim 4, wherein, The outer cylinder, the connecting part, and the inner cylinder are integrally formed.

6. The aerosol generating apparatus according to claim 4, wherein, The notch is used to concentrate microwave energy and provide capacitance to the resonant cavity; the capacitance provided by the notch to the resonant cavity and the width of the notch satisfy the following formula: Wherein, C represents the capacitance value provided by the notch to the resonant cavity, k represents the edge effect-higher-order mode weighting coefficient, ε0 represents the vacuum dielectric constant, R1 represents the distance from the axis of the receiving cavity to the inner side of the isolation wall, R2 represents the distance from the axis of the receiving cavity to the outer side of the isolation wall, and d represents the width of the notch.

7. The aerosol generating apparatus according to claim 6, wherein, At least three uniformly distributed dielectrics are disposed within the outer cavity, and the dielectrics are used to provide capacitance for the resonant cavity.

8. The aerosol generating apparatus according to claim 7, wherein, The resonant frequency of the resonant cavity is expressed by the formula: Among them, f r L represents the resonant frequency; L′ represents the inductance, which is related to the size of the resonant cavity; C2 represents the sum of the capacitance values ​​provided by each of the dielectrics to the resonant cavity.

9. The aerosol generating apparatus according to claim 1, wherein, The radio frequency radiator is a metal component.

10. The aerosol generating apparatus according to claim 4, wherein, A fixing member is also provided on the side of the isolation wall facing the receiving cavity, and the fixing member, the inner cylinder, and the first conductor are coaxially arranged.

11. The aerosol generating apparatus according to claim 2, wherein, It also includes a temperature sensor installed on the radio frequency radiator, the temperature sensor being used to collect the temperature value of the heated medium.

12. A method for controlling heating in an aerosol generating device, applied to the aerosol generating device, the aerosol generating device comprising a radio frequency (RF) source, a power supply connected to the RF source, and an RF heating component, wherein the power supply provides a DC signal to the RF source; the RF source converts the received DC signal into an electromagnetic wave signal and transmits the electromagnetic wave signal to the RF heating component; wherein, The radio frequency heating assembly includes a radio frequency radiator with a resonant cavity and a transmission connector mounted on the radio frequency radiator. The transmission connector is used to receive the electromagnetic wave signal to cause the resonant cavity to resonate. A coaxial receiving cavity is also provided within the resonant cavity for receiving the heated medium. The radio frequency radiator has a notch that communicates with the resonant cavity and surrounds the outside of the receiving cavity. The control method includes: When the heated medium is detected to be inserted into the containment cavity, the control power supply sends a DC signal to the radio frequency source. The radio frequency source converts the received DC signal into an electromagnetic wave signal and transmits the electromagnetic wave signal to the radio frequency heating component; The radio frequency heating component generates a corresponding high-frequency electromagnetic field according to the electromagnetic wave signal; wherein, the high-frequency electromagnetic field is used to heat the heated medium and cause the heated medium to generate an aerosol.

13. The control method according to claim 12, wherein, After the radio frequency heating component generates a corresponding high-frequency electromagnetic field according to the electromagnetic wave signal, it further includes: After the radio frequency heating component stops a single heating action, the temperature value of the heated medium is monitored. If the temperature value falls within a preset temperature range, an adjustment command is generated to control the operation of the radio frequency heating component; wherein, the adjustment command is used to instruct the radio frequency heating component to adjust the position of the heated medium in the radio frequency radiator, so that the main heating area of ​​the heated medium changes from the current heating segment to another heating segment; the current heating segment may be adjacent to or not adjacent to the other heating segment.

14. The control method according to claim 12, wherein, It also includes an adjustment assembly installed on the radio frequency radiator. The adjustment assembly includes a platform disposed at the bottom of the receiving cavity, a gear assembly connected to the bottom of the platform, and a motor connected to the gear assembly. The platform is used to carry the heated medium and to cause the heated medium to move relative to the receiving cavity.

15. The control method according to claim 12, wherein, The resonant cavity further includes an outer cavity located on the periphery of the receiving cavity. The radio frequency radiator includes a first conductor and a second conductor, which together define the receiving cavity and the outer cavity. The notch is formed between the first conductor and the second conductor, and the notch is located outside the receiving cavity.

16. The control method according to claim 15, wherein, The first conductor is fixed inside the resonant cavity; the second conductor includes an outer cylinder, a connecting portion connected to the top of the outer cylinder and extending inward, and an inner cylinder extending from the inner edge of the connecting portion towards the bottom. The inner cylinder and the first conductor together form an isolation wall that separates the receiving cavity and the outer cavity inside the resonant cavity. The notch is formed between the first conductor and the inner cylinder.

17. The control method according to claim 16, wherein, The outer cylinder, the connecting part, and the inner cylinder are integrally formed.

18. The control method according to claim 16, wherein, The notch is used to concentrate microwave energy and provide capacitance to the resonant cavity; the capacitance provided by the notch to the resonant cavity and the width of the notch satisfy the following formula: Wherein, C represents the capacitance value provided by the notch to the resonant cavity, k represents the edge effect-higher-order mode weighting coefficient, ε0 represents the vacuum dielectric constant, R1 represents the distance from the axis of the receiving cavity to the inner side of the isolation wall, R2 represents the distance from the axis of the receiving cavity to the outer side of the isolation wall, and d represents the width of the notch.

19. The control method according to claim 18, wherein, At least three uniformly distributed dielectrics are disposed within the outer cavity, and the dielectrics are used to provide capacitance for the resonant cavity.

20. The control method according to claim 19, wherein, The resonant frequency of the resonant cavity is expressed by the formula: Among them, f r L represents the resonant frequency; L′ represents the inductance, which is related to the size of the resonant cavity; C2 represents the sum of the capacitance values ​​provided by each of the dielectrics to the resonant cavity.

21. The control method according to claim 12, wherein, The radio frequency radiator is a metal component.

22. The control method according to claim 16, wherein, A fixing member is also provided on the side of the isolation wall facing the receiving cavity, and the fixing member, the inner cylinder, and the first conductor are coaxially arranged.

23. The control method according to claim 14, wherein, It also includes a temperature sensor installed on the radio frequency radiator, the temperature sensor being used to collect the temperature value of the heated medium.

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