Aerosol generation device

Abstract

This application discloses an aerosol generation device. It includes: a cavity; a microwave generating module; a radiation unit; and a controller connected to the microwave generating module, configured to trigger the microwave generating module to output a first microwave signal for a preset time based on a heating start signal, and to radiate the first microwave signal to a first part of the aerosol generation matrix located within the cavity through the radiation unit, thereby raising the temperature of the first part of the aerosol generation matrix to a preset target temperature; control the microwave generating module to switch to output a second microwave signal, and to radiate the second microwave signal to a second part of the aerosol generation matrix located within the cavity through the radiation unit, thereby maintaining the temperature of the second part of the aerosol generation matrix at the preset target temperature; and trigger the microwave generating module to stop outputting the second microwave signal when a heating end signal is received. Therefore, this application can rapidly produce smoke, achieve uniform heating, and improve the utilization rate of the aerosol generation matrix.

Description

Technical Field

[0001] This application relates to the field of aerosol generation technology, and in particular to an aerosol generation apparatus. Background Technology

[0002] Tobacco products (e.g., cigarettes, cigars, etc.) produce tobacco smoke by burning tobacco during use. Efforts are being made to replace these tobacco-burning products by creating products that release compounds without combustion. An example of such a product is a heating device that releases compounds by heating rather than burning the material. As an example, the heating element of this device is placed within an aerosol-generating matrix. Heat is generated by the heating element and conducted to the aerosol-generating matrix, which then produces an inhalable aerosol when it reaches the smoke emission temperature. However, this heating device has a long preheating time, resulting in a reduced user experience. Furthermore, the temperature is higher in the vicinity of the heating element, decreasing outwards from the heating element, leading to uneven heating of the aerosol-generating matrix and low utilization. Utility Model Content

[0003] This application aims to provide an aerosol generation device that can shorten the preheating time of the aerosol generation matrix, quickly produce smoke, and achieve uniform heating, thereby improving the utilization rate of the aerosol generation matrix.

[0004] At least one embodiment of this application provides an aerosol generating apparatus, comprising:

[0005] A cavity for removably receiving an aerosol-generating matrix comprising a first portion and a second portion;

[0006] A microwave generator module is used to output a first microwave signal and a second microwave signal, wherein the frequency of the first microwave signal is greater than the frequency of the second microwave signal.

[0007] A radiation unit is used to radiate the first microwave signal and the second microwave signal to the aerosol generation matrix located in the cavity;

[0008] The controller, connected to the microwave generating module, is configured to trigger the microwave generating module to output a first microwave signal for a preset time based on a heating start signal, and radiate the first microwave signal to a first part of the aerosol generating matrix located in the cavity through the radiation unit, thereby raising the temperature of the first part of the aerosol generating matrix to a preset target temperature; control the microwave generating module to switch to output a second microwave signal, and radiate the second microwave signal to a second part of the aerosol generating matrix located in the cavity through the radiation unit, thereby maintaining the temperature of the second part of the aerosol generating matrix at the preset target temperature; and trigger the microwave generating module to stop outputting the second microwave signal when a heating end signal is received.

[0009] In some embodiments, the preset time is less than or equal to 1 second.

[0010] In some embodiments, an airflow sensor is also included, connected to the controller, and configured to output the heating start signal in response to the start of a single suction action applied by the user to the aerosol generating device; and to output the heating end signal in response to the end of a single suction action applied by the user to the aerosol generating device.

[0011] In some embodiments, the frequency of the first microwave signal is more than twice the frequency of the second microwave signal.

[0012] In some embodiments, the frequency of the first microwave signal is 5.85 GHz, and the frequency of the second microwave signal is 2.45 GHz.

[0013] In some embodiments, a dielectric sensor is further included, disposed within the cavity and connected to the controller, configured to detect the humidity or density of the aerosol-generating matrix, thereby causing the controller to adjust the power ratio of the first microwave signal and the second microwave signal based on the humidity or density of the aerosol-generating matrix.

[0014] In some embodiments, a temperature sensor is also included, connected to the controller and configured to detect the temperature of the first and second portions of the aerosol-generating matrix.

[0015] In some embodiments, the inner wall of the cavity is provided with a spiral groove.

[0016] In some embodiments, the microwave generating module includes:

[0017] A first microwave generator, connected to the controller, is configured to output the first microwave signal for a preset duration when the controller receives a heating start signal.

[0018] A second microwave generator, connected to the controller, is configured to output the second microwave signal after the preset time has elapsed, until the controller receives a heating end signal and stops outputting the second microwave signal.

[0019] An amplification branch, connected to the first microwave generator and the second microwave generator respectively, is configured to amplify the first microwave signal and the second microwave signal, wherein the amplification branch includes a multi-stage amplifier connected in series.

[0020] In some embodiments, when the microwave generating module includes an amplification branch, the radiating unit includes:

[0021] A dual-frequency radiation unit, connected to one of the amplification branches, is configured to radiate the first microwave signal to a first portion of the aerosol generating matrix located within the cavity, thereby raising the temperature of the first portion of the aerosol generating matrix to a preset target temperature, and to radiate the second microwave signal to a second portion of the aerosol generating matrix located within the cavity, thereby maintaining the temperature of the second portion of the aerosol generating matrix at the preset target temperature.

[0022] When the microwave generating module includes two amplification branches, the radiation unit includes:

[0023] The first single-frequency radiation unit, connected to one of the amplification branches, is configured to radiate the first microwave signal to a first part of the aerosol generating matrix located in the cavity, thereby raising the temperature of the first part of the aerosol generating matrix to a preset target temperature.

[0024] The second single-frequency radiation unit, connected to another of the amplification branches, is configured to radiate the second microwave signal toward a second portion of the aerosol-generating matrix located within the cavity, thereby maintaining the temperature of the second portion of the aerosol-generating matrix at the preset target temperature.

[0025] In some embodiments, a coupling circuit is also included. When the microwave generating module includes an amplification branch, the input terminal of the coupling circuit is connected to one of the amplification branches, the output terminal of the coupling circuit is connected to the dual-frequency radiation unit, and the reflection terminal of the coupling circuit is connected to the controller.

[0026] When the microwave generating module includes two amplification branches, the input terminal of the coupling circuit is connected to the two amplification branches, the output terminal of the coupling circuit is connected to the first single-frequency radiation unit and the second single-frequency radiation unit respectively, and the reflection terminal of the coupling circuit is connected to the controller.

[0027] In some embodiments, a microwave detection circuit is further included, connected between the reflecting end of the coupling circuit and the controller, and configured to detect the reflected voltage of the microwave signal reflected back by the cavity.

[0028] In some embodiments, a filter is also included, connected between the reflecting end of the coupling circuit and the microwave detection circuit, and configured to filter the microwave signal reflected back by the cavity.

[0029] In some embodiments, an analog-to-digital converter circuit is also included, connected between the microwave detection circuit and the controller, and configured to convert the reflected voltage detected by the microwave detection circuit into a digital signal.

[0030] The beneficial effects of this application are as follows: Based on the heating start signal, the microwave generating module outputs a first microwave signal for a preset time, and the first microwave signal is radiated to the first part of the aerosol generating matrix located in the cavity through the radiation unit, thereby raising the temperature of the first part of the aerosol generating matrix to the preset target temperature. Therefore, the preheating time of the aerosol generating matrix can be shortened and smoke can be emitted quickly. The first microwave signal is radiated to the first part of the aerosol generating matrix located in the cavity through the radiation unit, thereby raising the temperature of the first part of the aerosol generating matrix to the preset target temperature. The second microwave signal is radiated to the second part of the aerosol generating matrix located in the cavity through the radiation unit, thereby maintaining the temperature of the second part of the aerosol generating matrix at the preset target temperature. Therefore, uniform heating can be achieved and the utilization rate of the aerosol generating matrix can be improved. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the specific embodiments of this application, the accompanying drawings used in the description of the specific embodiments will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0032] Figure 1 This is a schematic diagram of an aerosol generating device provided in an embodiment of this application;

[0033] Figure 2 This is a schematic diagram of an aerosol generation matrix provided in an embodiment of this application;

[0034] Figure 3 This is a schematic diagram of another aerosol generation matrix provided in an embodiment of this application;

[0035] Figure 4 This is a schematic diagram of an aerosol generating device with an omitted cavity provided in an embodiment of this application;

[0036] Figure 5This is a schematic diagram of another aerosol generating device with an omitted cavity provided in an embodiment of this application;

[0037] Figure 6 This is a schematic diagram of another aerosol generating device provided in the embodiments of this application;

[0038] Figure 7 This is a schematic flowchart of a control method for an aerosol generating device provided in an embodiment of this application;

[0039] Figure 8 This is a schematic flowchart of another control method for an aerosol generating device provided in an embodiment of this application. Detailed Implementation

[0040] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0041] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0042] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0043] Please see Figure 1This application provides an aerosol generating apparatus, comprising: a cavity 10 for removably receiving an aerosol generating matrix 200 including a first portion 201 and a second portion 202; a microwave generating module 20 for outputting a first microwave signal and a second microwave signal, wherein the frequency of the first microwave signal is greater than the frequency of the second microwave signal; a radiation unit 30 for radiating the first microwave signal and the second microwave signal toward the aerosol generating matrix 200 located within the cavity 10; and a controller 40 connected to the microwave generating module 20 and configured to trigger the microwave generating module 20 to output the first microwave signal for a preset time based on a heating start signal. The first microwave signal is radiated to the first part 201 of the aerosol generating matrix 200 located in the cavity 10 through the radiation unit 30, thereby raising the temperature of the first part 201 of the aerosol generating matrix 200 to a preset target temperature; the microwave generating module 20 is controlled to switch to output a second microwave signal, and the second microwave signal is radiated to the second part 202 of the aerosol generating matrix 200 located in the cavity 10 through the radiation unit 30, thereby maintaining the temperature of the second part 202 of the aerosol generating matrix 200 at a preset target temperature; when a heating end signal is received, the microwave generating module 20 is triggered to stop outputting the second microwave signal.

[0044] In some embodiments, the preset time is less than or equal to 1 second.

[0045] The preset target temperature, for example, 300℃, is the smoke emission temperature of the first part 201 of the aerosol generating matrix 200. This indicates that the preset time is the heating time of the first part 201. The first part 201 is heated completely within the preset time, and nicotine, aromatic substances, etc., are rapidly released, allowing the user to inhale the first puff of smoke within the preset time, thus shortening the user's waiting time. Therefore, by setting the preset time to be less than or equal to 1 second, the user can inhale the first puff of smoke within 1 second, effectively improving the user experience.

[0046] In some embodiments, the frequency of the first microwave signal is more than twice the frequency of the second microwave signal.

[0047] The aerosol generating device in this embodiment uses a first microwave signal and a second microwave signal for heating. Since the frequency of the first microwave signal is more than twice that of the second microwave signal, the first microwave signal is a high-frequency microwave signal, while the second microwave signal is a low-frequency microwave signal. Therefore, the first microwave signal has the characteristics of short wavelength, shallow penetration depth, and fast heating speed, while the second microwave signal has the characteristics of long wavelength, deep penetration depth, and uniform heating. Compared to the first microwave signal, the second microwave signal has a lower microwave energy density, which can avoid local overheating in the second part 202 and maintain temperature stability, preferably maintaining the temperature within a temperature fluctuation range of ±5℃.

[0048] Utilizing the characteristics of short wavelength, shallow penetration, and rapid heating of the first microwave signal, it radiates onto the first part 201 of the aerosol generating matrix 200, raising its temperature to a preset target temperature. This allows the user to inhale the first puff of smoke within a preset time, shortening the user's waiting time. Furthermore, the temperature rise of the first part 201 to the preset target temperature prepares for switching to the second microwave signal. Next, the second microwave signal radiates onto the second part 202 of the aerosol generating matrix 200, maintaining its temperature at the preset target temperature. Utilizing the characteristics of long wavelength, deep penetration, and uniform heating of the second microwave signal, uniform heating is achieved within the second part 202, further releasing nicotine, aromatic substances, etc., from the second part 202. In some specific embodiments, the frequency of the first microwave signal is 5.85 GHz, and the frequency of the second microwave signal is 2.45 GHz.

[0049] In some embodiments, the inner wall of the cavity 10 is provided with a spiral groove.

[0050] As an example, cavity 10 is a silver-plated ceramic cavity structure. The coupling efficiency of the first and second microwave signals within cavity 10 can be enhanced by providing spiral grooves on the inner wall.

[0051] Please see Figure 2 and Figure 3 The aerosol generating matrix 200 can be constructed in a cylindrical or cubic shape, including a first part 201 and a second part 202.

[0052] The first part 201 is the surface layer of the aerosol generating matrix 200, and the second part 202 is the inner layer of the aerosol generating matrix 200. As can be seen from the figure, the first part 201 is located outside the second part 202, and the thickness of the first part 201 is less than the thickness of the second part 202.

[0053] The materials in Part 1 (201) and Part 2 (202) have different compositions. Specifically, the material in Part 1 (201) has a strong ability to absorb microwave energy under the influence of the first microwave signal, but a weak ability to absorb microwave energy under the influence of the second microwave signal. Similarly, the material in Part 2 (202) has a weak ability to absorb microwave energy under the influence of the first microwave signal, but a strong ability to absorb microwave energy under the influence of the second microwave signal.

[0054] In some embodiments, please refer to Figure 4 and Figure 5 The microwave generating module 20 includes:

[0055] The first microwave generator 21 is connected to the controller 40 and is configured to output a first microwave signal for a preset time when the controller 40 receives a heating start signal.

[0056] The second microwave generator 22 is connected to the controller 40 and is configured to output a second microwave signal after a preset time has elapsed, until the controller 40 receives a heating end signal and stops outputting the second microwave signal.

[0057] In some embodiments, the output power of both the first microwave generator 21 and the second microwave generator 22 is adjustable. In one specific embodiment, the first microwave generator 21 is a 5.85 GHz solid-state microwave generator, outputting a first microwave signal with a frequency of 5.85 GHz and a power of 10W-30W for a preset duration. The second microwave generator 22 is a 2.45 GHz solid-state microwave generator, outputting a second microwave signal with a frequency of 2.45 GHz and a power of 5W-20W after the preset time has elapsed.

[0058] Amplification branch 23 is connected to the first microwave generator 21 and the second microwave generator 22 respectively, and is configured to amplify the first microwave signal and the second microwave signal. Amplification branch 23 includes a multi-stage amplifier connected in series with each other.

[0059] As an example, amplification branch 23 includes two amplifier stages connected in series. As another example, amplification branch 23 includes three amplifier stages connected in series. It can be understood that the number of amplifier stages can be reasonably set according to the size requirements of the aerosol generating device, the output gain of the aerosol generating device, and the output efficiency of each amplifier stage.

[0060] In some embodiments, please refer again Figure 4 When the microwave generating module 20 includes an amplification branch 23, the radiation unit 30 includes:

[0061] The dual-frequency radiation unit 31, connected to an amplification branch 23, is configured to radiate a first microwave signal to the first part 201 of the aerosol generation matrix 200 located in the cavity 10, thereby raising the temperature of the first part 201 of the aerosol generation matrix 200 to a preset target temperature, and to radiate a second microwave signal to the second part 202 of the aerosol generation matrix 200 located in the cavity 10, thereby maintaining the temperature of the second part 202 of the aerosol generation matrix 200 at the preset target temperature.

[0062] The dual-frequency radiation unit 31 has a wide frequency range and can be used to radiate a first microwave signal to the first part 201 of the aerosol generation matrix 200 located in the cavity 10, and to radiate a second microwave signal to the second part 202 of the aerosol generation matrix 200 located in the cavity 10.

[0063] In some embodiments, please refer again Figure 5 When the microwave generating module 20 includes two amplification branches 23, the radiation unit 30 includes:

[0064] The first single-frequency radiation unit 321, connected to one of the amplification branches 23, is configured to radiate a first microwave signal to the first part 201 of the aerosol generation matrix 200 located in the cavity 10, thereby raising the temperature of the first part 201 of the aerosol generation matrix 200 to a preset target temperature.

[0065] The second single-frequency radiation unit 322, connected to another amplification branch 23, is configured to radiate the second microwave signal to the second part 202 of the aerosol generation matrix 200 located in the cavity 10, thereby maintaining the temperature of the second part 202 of the aerosol generation matrix 200 at a preset target temperature.

[0066] The first single-frequency radiation unit 321 and the second single-frequency radiation unit 322 have specific frequency ranges. The first microwave signal falls within the frequency range of the first single-frequency radiation unit 321, and the second microwave signal falls within the frequency range of the second single-frequency radiation unit 322.

[0067] In some embodiments, please refer again Figure 4 and Figure 5 The aerosol generating device also includes one or more of a coupling circuit 81, a microwave detection circuit 82, a filter 83, and an analog-to-digital conversion circuit 84.

[0068] When the microwave generating module 20 includes one amplification branch 23, the input terminal of the coupling circuit 81 is connected to one amplification branch 23, the output terminal of the coupling circuit 81 is connected to the dual-frequency radiation unit 30, and the reflection terminal of the coupling circuit 81 is connected to the controller 40; when the microwave generating module 20 includes two amplification branches 23, the input terminal of the coupling circuit 81 is connected to both amplification branches 23, the output terminal of the coupling circuit 81 is connected to the first single-frequency radiation unit 30 and the second single-frequency radiation unit 30 respectively, and the reflection terminal of the coupling circuit 81 is connected to the controller 40.

[0069] As an example, the coupling circuit 81 includes a circulator.

[0070] The microwave detection circuit 82 is connected between the reflecting end of the coupling circuit 81 and the controller 40, and is configured to detect the reflected voltage of the microwave signal reflected back by the cavity 10.

[0071] The filter 83 is connected between the reflecting end of the coupling circuit 81 and the microwave detection circuit 82, and is configured to filter the microwave signal reflected back by the cavity 10.

[0072] The analog-to-digital converter circuit 84 is connected between the microwave detection circuit 83 and the controller 40 and is configured to convert the reflected voltage detected by the microwave detection circuit 83 into a digital signal.

[0073] In some embodiments, the microwave detection circuit 82 is further configured to detect the reflected power of the microwave signal reflected back by the cavity 10. Based on this, the analog-to-digital converter circuit 84 is further configured to convert the reflected power detected by the microwave detection circuit 83 into a digital signal.

[0074] Based on any of the above embodiments, please refer to Figure 6 The aerosol generating device also includes one or more of a gas flow sensor 50, a dielectric sensor 60, and a temperature sensor 70.

[0075] The airflow sensor 50 is connected to the controller 40 and is configured to output a heating start signal in response to the start of a single suction action applied by the user to the aerosol generating device; and to output a heating end signal in response to the end of a single suction action applied by the user to the aerosol generating device.

[0076] When the airflow sensor 50 outputs a heating start signal in response to the start of a single suction action applied by the user to the aerosol generating device, the controller 40 triggers the microwave generating module 20 to output a first microwave signal for a preset time based on the heating start signal. The first microwave signal is then radiated through the radiation unit 30 to the first portion 201 of the aerosol generating matrix 200 located within the cavity 10, thereby raising the temperature of the first portion 201 of the aerosol generating matrix 200 to a preset target temperature. After the preset time is reached, the controller controls the microwave generating module 20 to switch to outputting a second microwave signal, which is then radiated through the radiation unit 30 to the second portion 202 of the aerosol generating matrix 200 located within the cavity 10, thereby maintaining the temperature of the second portion 202 of the aerosol generating matrix 200 at the preset target temperature. When the airflow sensor 50 outputs a heating end signal in response to the end of a single suction action applied by the user to the aerosol generating device, the controller 40 triggers the microwave generating module 20 to stop outputting the second microwave signal.

[0077] A dielectric sensor 60 is disposed inside the cavity 10 and connected to the controller 40. It is configured to detect the humidity or density of the aerosol generating matrix 200, thereby enabling the controller 40 to adjust the power ratio of the first microwave signal and the second microwave signal based on the humidity or density of the aerosol generating matrix 200.

[0078] The aerosol generating matrix 200 is monitored in real time by a dielectric sensor 60, which monitors the humidity or density (tobacco state). The power ratio of the first microwave signal and the second microwave signal is dynamically adjusted, thereby improving the energy utilization rate of the aerosol generating device. For example, in the initial stage of heating, the power ratio of the first microwave signal and the second microwave signal is 8:2, and in the later stage of heating, the power ratio of the first microwave signal and the second microwave signal is 2:8.

[0079] Temperature sensor 70 is connected to controller 40 and is configured to detect the temperature of the first part 201 and the second part 202 of aerosol generating matrix 200.

[0080] In some embodiments, based on the temperature of the first part 201 and the second part 202 of the aerosol generating matrix 200 detected by the temperature sensor 70, a PID algorithm is combined to achieve precise temperature control throughout the heating cycle, thereby reducing the generation of harmful substances by the aerosol generating matrix 200 during the heating process.

[0081] In summary, the aerosol generation device provided in this application triggers the microwave generation module 20 to output a first microwave signal for a preset time based on a heating start signal. The first microwave signal is then radiated to the first portion 201 of the aerosol generation matrix 200 located within the cavity 10 via the radiation unit 30, thereby raising the temperature of the first portion 201 of the aerosol generation matrix 200 to a preset target temperature. Therefore, the preheating time of the aerosol generation matrix 200 can be shortened, and smoke can be generated quickly. Furthermore, the first microwave signal is radiated to the first portion 201 of the aerosol generation matrix 200 located within the cavity 10 via the radiation unit 30, raising the temperature of the first portion 201 of the aerosol generation matrix 200 to a preset target temperature. Additionally, a second microwave signal is radiated to the second portion 202 of the aerosol generation matrix 200 located within the cavity 10 via the radiation unit 30, maintaining the temperature of the second portion 202 of the aerosol generation matrix 200 at a preset target temperature. Therefore, uniform heating can be achieved, improving the utilization rate of the aerosol generation matrix 200.

[0082] Please see Figure 7 This application provides a control method for an aerosol generating apparatus, applicable to any embodiment of the aerosol generating apparatus of this application. The method includes:

[0083] Step S11: Based on the heating start signal, the microwave generation module 20 is triggered to output a first microwave signal for a preset time, and the first microwave signal is radiated to the first part 201 of the aerosol generation matrix 200 located in the cavity 10 through the radiation unit 30, thereby raising the temperature of the first part 201 of the aerosol generation matrix 200 to the preset target temperature.

[0084] Step S12: Control the microwave generating module 20 to switch the output of the second microwave signal, and radiate the second microwave signal to the second part 202 of the aerosol generating matrix 200 located in the cavity 10 through the radiation unit 30, so that the temperature of the second part 202 of the aerosol generating matrix 200 is maintained at a preset target temperature. When the heating end signal is received, the microwave generating module 20 is triggered to stop outputting the second microwave signal.

[0085] When the airflow sensor 50 responds to the user's single suction action applied to the aerosol generating device and outputs a heating start signal, the controller 40 triggers the microwave generating module 20 to output a first microwave signal for a preset time based on the heating start signal. The controller then radiates the first microwave signal through the radiation unit 30 to the first portion 201 of the aerosol generating matrix 200 located within the cavity 10, thereby raising the temperature of the first portion 201 of the aerosol generating matrix 200 to a preset target temperature (assuming the preset target temperature is 300°C). At this time, the first portion 201 of the aerosol generating matrix 200 is heated and emits smoke.

[0086] The controller 40 controls the microwave generating module 20 to switch the output of the second microwave signal, and radiates the second microwave signal to the second part 202 of the aerosol generating matrix 200 located in the cavity 10 through the radiation unit 30, thereby maintaining the temperature of the second part 202 of the aerosol generating matrix 200 at a preset target temperature (i.e., 300℃, or within the temperature difference range of the preset target temperature, i.e., 300℃±5℃). At this time, the second part 202 of the aerosol generating matrix 200 is heated and emits smoke.

[0087] When the airflow sensor 50 outputs a heating end signal in response to the end of a single suction action applied by the user to the aerosol generating device, the controller 40 triggers the microwave generating module 20 to stop outputting the second microwave signal.

[0088] In some embodiments, the preset time is less than or equal to 1 second.

[0089] The preset target temperature, for example, 300℃, is the smoke emission temperature of the first part 201 of the aerosol generating matrix 200. This indicates that the preset time is the heating time of the first part 201. The first part 201 is heated completely within the preset time, and nicotine, aromatic substances, etc., are rapidly released, allowing the user to inhale the first puff of smoke within the preset time, thus shortening the user's waiting time. Therefore, by setting the preset time to be less than or equal to 1 second, the user can inhale the first puff of smoke within 1 second, effectively improving the user experience.

[0090] In some embodiments, the frequency of the first microwave signal is more than twice the frequency of the second microwave signal.

[0091] The aerosol generating device in this embodiment uses a first microwave signal and a second microwave signal for heating. Since the frequency of the first microwave signal is more than twice that of the second microwave signal, the first microwave signal is a high-frequency microwave signal, while the second microwave signal is a low-frequency microwave signal. Therefore, the first microwave signal has the characteristics of short wavelength, shallow penetration depth, and fast heating speed, while the second microwave signal has the characteristics of long wavelength, deep penetration depth, and uniform heating. Compared to the first microwave signal, the second microwave signal has a lower microwave energy density, which can avoid local overheating in the second part 202 and maintain temperature stability, preferably maintaining the temperature within a temperature fluctuation range of ±5℃.

[0092] Utilizing the characteristics of short wavelength, shallow penetration, and rapid heating of the first microwave signal, it radiates onto the first part 201 of the aerosol generating matrix 200, raising its temperature to a preset target temperature. This allows the user to inhale the first puff of smoke within a preset time, shortening the user's waiting time. Furthermore, the temperature rise of the first part 201 to the preset target temperature prepares for switching to the second microwave signal. Next, the second microwave signal radiates onto the second part 202 of the aerosol generating matrix 200, maintaining its temperature at the preset target temperature. Utilizing the characteristics of long wavelength, deep penetration, and uniform heating of the second microwave signal, uniform heating is achieved within the second part 202, further releasing nicotine and aromatic substances from it.

[0093] In some specific embodiments, the frequency of the first microwave signal is 5.85 GHz, and the frequency of the second microwave signal is 2.45 GHz.

[0094] Based on any of the foregoing embodiments, please refer to Figure 8 The method further includes:

[0095] Step S13: Adjust the power ratio of the first microwave signal and the second microwave signal based on the humidity or density of the aerosol generation matrix 200.

[0096] Based on the humidity or density (tobacco state) of the aerosol generating matrix 200, the power ratio of the first microwave signal and the second microwave signal is dynamically adjusted, thereby improving the energy utilization rate of the aerosol generating device. For example, in the initial stage of heating, the power ratio of the first microwave signal and the second microwave signal is 8:2, and in the later stage of heating, the power ratio of the first microwave signal and the second microwave signal is 2:8.

[0097] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. An aerosol-generating device, characterized by, include: A cavity for removably receiving an aerosol-generating matrix comprising a first portion and a second portion; A microwave generator module is used to output a first microwave signal and a second microwave signal, wherein the frequency of the first microwave signal is greater than the frequency of the second microwave signal. A radiation unit is used to radiate the first microwave signal and the second microwave signal to the aerosol generation matrix located in the cavity; The controller, connected to the microwave generating module, is configured to trigger the microwave generating module to output the first microwave signal for a preset time based on the heating start signal, and to radiate the first microwave signal to the first part of the aerosol generating matrix located in the cavity through the radiation unit, thereby raising the temperature of the first part of the aerosol generating matrix to a preset target temperature. The microwave generating module is controlled to switch the output of the second microwave signal, and the second microwave signal is radiated to the second part of the aerosol generating matrix located in the cavity through the radiation unit, so that the temperature of the second part of the aerosol generating matrix is ​​maintained at the preset target temperature. When a heating end signal is received, the microwave generating module is triggered to stop outputting the second microwave signal.

2. The aerosol-generating device of claim 1, wherein, The preset time is less than or equal to 1 second.

3. The aerosol-generating device of claim 1, wherein, It also includes an airflow sensor connected to the controller, configured to output the heating start signal in response to the start of a single suction action applied by the user to the aerosol generating device; and to output the heating end signal in response to the end of a single suction action applied by the user to the aerosol generating device.

4. The aerosol-generating device of claim 1, wherein, The frequency of the first microwave signal is more than twice the frequency of the second microwave signal.

5. The aerosol-generating device of claim 4, wherein, The frequency of the first microwave signal is 5.85 GHz, and the frequency of the second microwave signal is 2.45 GHz.

6. The aerosol-generating device of claim 1, wherein, It also includes a dielectric sensor disposed within the cavity and connected to the controller, configured to detect the humidity or density of the aerosol-generating matrix, thereby enabling the controller to adjust the power ratio of the first microwave signal and the second microwave signal based on the humidity or density of the aerosol-generating matrix.

7. The aerosol-generating device of claim 1, wherein, It also includes a temperature sensor, connected to the controller, configured to detect the temperature of the first and second portions of the aerosol-generating matrix.

8. The aerosol-generating device of claim 1, wherein, The inner wall of the cavity is provided with spiral grooves.

9. The aerosol-generating device of claim 1, wherein, The microwave generating module includes: A first microwave generator, connected to the controller, is configured to output the first microwave signal for a preset duration when the controller receives a heating start signal. A second microwave generator, connected to the controller, is configured to output the second microwave signal after the preset time has elapsed, until the controller receives a heating end signal and stops outputting the second microwave signal. An amplification branch, connected to the first microwave generator and the second microwave generator respectively, is configured to amplify the first microwave signal and the second microwave signal, wherein the amplification branch includes a multi-stage amplifier connected in series. 10.The aerosol-generating device of claim 9, wherein, When the microwave generating module includes an amplification branch, the radiation unit includes: A dual-frequency radiation unit, connected to one of the amplification branches, is configured to radiate the first microwave signal to a first portion of the aerosol generating matrix located within the cavity, thereby raising the temperature of the first portion of the aerosol generating matrix to a preset target temperature, and to radiate the second microwave signal to a second portion of the aerosol generating matrix located within the cavity, thereby maintaining the temperature of the second portion of the aerosol generating matrix at the preset target temperature. When the microwave generating module includes two amplification branches, the radiation unit includes: The first single-frequency radiation unit, connected to one of the amplification branches, is configured to radiate the first microwave signal to a first part of the aerosol generating matrix located in the cavity, thereby raising the temperature of the first part of the aerosol generating matrix to a preset target temperature. The second single-frequency radiation unit, connected to another of the amplification branches, is configured to radiate the second microwave signal toward a second portion of the aerosol-generating matrix located within the cavity, thereby maintaining the temperature of the second portion of the aerosol-generating matrix at the preset target temperature. 11.The aerosol-generating device of claim 10, wherein, It also includes a coupling circuit. When the microwave generating module includes an amplification branch, the input terminal of the coupling circuit is connected to one of the amplification branches, the output terminal of the coupling circuit is connected to the dual-frequency radiation unit, and the reflection terminal of the coupling circuit is connected to the controller. When the microwave generating module includes two amplification branches, the input terminal of the coupling circuit is connected to the two amplification branches, the output terminal of the coupling circuit is connected to the first single-frequency radiation unit and the second single-frequency radiation unit respectively, and the reflection terminal of the coupling circuit is connected to the controller. 12.The aerosol-generating device of claim 11, wherein, It also includes a microwave detection circuit connected between the reflector of the coupling circuit and the controller, configured to detect the reflected voltage of the microwave signal reflected back by the cavity.

13. The aerosol-generating device of claim 12, wherein, It also includes a filter connected between the reflecting end of the coupling circuit and the microwave detection circuit, configured to filter the microwave signal reflected back by the cavity.

14. The aerosol generating apparatus according to claim 12, characterized in that, It also includes an analog-to-digital conversion circuit connected between the microwave detection circuit and the controller, configured to convert the reflected voltage detected by the microwave detection circuit into a digital signal.

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