Aerosol-generating apparatus

Abstract

An aerosol-generating apparatus (1000). The aerosol-generating apparatus (1000) comprises a heating element (100) and a control circuit (200), wherein the control circuit (200) is configured to heat the heating element (100) by means of plasma pulse heating.

Description

Aerosol-generating device

[0001] Priority information

[0002] The present application claims priority to and the benefit of the filing date of Chinese Patent Application No. 202411004226.9, filed on July 24, 2024, in the State Intellectual Property Office of China, and the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of aerosol generation, in particular to an aerosol-generating device. BACKGROUND

[0004] In current aerosol-generating devices, a traditional resistance heating method is usually used to heat the heating body. Since resistance heating is continuous heating at a small power, the heating body has a slow temperature rising and falling speed, and there is a significant time delay between the temperature rising curve and the heating power, resulting in a large temperature control error of the heating body and affecting the taste. SUMMARY

[0005] The present application provides an aerosol-generating device to solve at least one of the above technical problems.

[0006] The aerosol-generating device of the present application comprises:

[0007] a heating body; and

[0008] a control circuit configured to heat the heating body using a plasma pulse heating method.

[0009] In the aerosol-generating device of the present application, the control circuit heats the heating body using a plasma pulse heating method. Plasma heating has the characteristics of fast temperature rising and falling, so that the time delay between the temperature rising curve and the heating power is small, which is beneficial to accurately control the temperature of the heating body and avoid the phenomenon of burning the aerosol-generating substrate, and ensures the taste. Moreover, the pulse heating method in plasma heating can control the temperature fluctuation of the heating body, enrich the kinetic reaction of the heating process, and further improve the taste.

[0010] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0011] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort. Among them:

[0012] Figure 1 is a schematic diagram of the structure of an aerosol generating apparatus according to certain embodiments of this application;

[0013] Figure 2 is a schematic diagram of the structure of the heating element in some embodiments of this application;

[0014] Figure 3 is a schematic cross-sectional view of the heating element in Figure 2 along the AA direction;

[0015] Figure 4 is a schematic diagram of the temperature rise curve of the heating element when resistance heating is used in related technologies;

[0016] Figure 5 is a schematic diagram of the temperature rise curve of the heating element when using plasma pulse heating in some embodiments of this application;

[0017] Figure 6 is a schematic diagram of part of the heating curves in Figure 5;

[0018] Figure 7 is a schematic diagram showing the change of pulse heating power of the control circuit and temperature of the heating element over time when using plasma pulse heating in certain embodiments of this application.

[0019] Figure 8 is a schematic diagram showing the change of pulse heating power of the control circuit and temperature of the heating element over time when using plasma pulse heating in certain embodiments of this application.

[0020] Figure 9 is a schematic diagram of controlling the temperature of a high-temperature section based on the temperature of a low-temperature section according to certain embodiments of this application;

[0021] Figure 10 is a schematic diagram of a portion of the curves in Figure 9;

[0022] Figure 11 is a schematic diagram of temperature control parameters in some embodiments of this application.

[0023] Explanation of reference numerals in the attached drawings: Heating element 100, outer tube 20, conical end 21, open end 22, opening 230, low temperature section 23, high temperature section 24, temperature measuring component 80, temperature sensing part 81, conductive part 82, first electrode 110, discharge end 111, discharge end face 1104, conductive end 112, second electrode 120, discharge area 130, control circuit 200, aerosol generating matrix 300, aerosol generating device 1000. Detailed Implementation

[0024] The embodiments of this application are described in detail below. Examples of the 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 are only used to explain this application, and should not be construed as limiting this application.

[0025] Please refer to Figures 1 to 3. The aerosol generating apparatus 1000 of this application includes a heating element 100 and a control circuit 200. The control circuit 200 is configured to heat the heating element 100 using a plasma pulse heating method.

[0026] In the aerosol generating apparatus 1000 of this application embodiment, the control circuit 200 uses plasma pulse heating to heat the heating element 100. Plasma heating is characterized by rapid temperature rise and fall, resulting in a small time delay between the heating curve and the heating power. This facilitates precise temperature control of the heating element 100, preventing the aerosol generating matrix 300 from burning and ensuring good taste. Furthermore, the pulse heating method in plasma heating can control the temperature fluctuations of the heating element 100, enriching the kinetic reactions of the heating process and further improving the taste.

[0027] Specifically, the heating element 100 is used to heat the aerosol generating matrix 300 in the aerosol generating device 1000 to form an aerosol. The aerosol generated in the aerosol generating device 1000 can be used for various purposes such as food, medicine, and industrial production.

[0028] In related technologies, aerosol generating devices typically employ traditional resistance heating to heat the heating element. Because resistance heating uses low-power continuous heating, the heating element's temperature rises and falls slowly (as shown in Figure 4), resulting in a significant time delay between the heating curve and the heating power. This leads to substantial errors in the heating element's temperature control, affecting the taste.

[0029] The aerosol generating apparatus 1000 according to the present application has at least the following advantages:

[0030] First, since plasma heating uses air as the heating medium, it does not have the risk of melting compared to resistance heating.

[0031] Secondly, since the plasma generation process releases a large amount of heat, the heating power of plasma heating can be set to a relatively high level (up to 100W or more), and can be adjusted rapidly, allowing the heating element 100 to heat up and down quickly. This results in a smaller time delay between the heating curve of the heating element 100 and the heating power of the control circuit 200, which is beneficial for precise temperature control of the heating element 100, avoiding the burning of the aerosol-generating matrix 300, and ensuring the desired taste. As shown in Figures 5 and 6, when plasma heating is used in the embodiment of this application, the heating element 100 can quickly heat up to above 350°C, meeting the requirements for rapid preheating.

[0032] Third, in traditional resistance heating, the heating element's temperature rise curve is smooth with no significant fluctuations (as shown in Figure 4), with temperature fluctuations only occurring during the suction process. However, the embodiment of this application employs pulse heating, a method within plasma heating, which can control the temperature fluctuations of the heating element 100 (as shown in Figure 5), enriching the kinetic reactions of the heating process and further improving the taste. Furthermore, during pulse heating, the heat transfer of the heating element 100 primarily includes radiation and conduction. By adjusting the pulse parameters, the proportion of radiation and conduction in the total heat transfer can be adjusted, which helps to regulate the aerosol's taste.

[0033] It is understandable that with traditional resistance heating, if pulse heating is used, the temperature control delay time is relatively long due to the large heat capacity of the resistance wire, making temperature control of the heating element difficult. However, in the embodiment of this application, since plasma heating uses air as the heating medium, and air has a relatively small heat capacity, it can heat up and cool down rapidly. Therefore, when pulse heating is used on the basis of plasma heating, the temperature of the heating element 100 can also fluctuate rapidly, with a smaller time delay between the temperature rise curve and the power curve. As shown in Figures 7 and 8, in each pulse heating cycle of the pulse heating method, the temperature rise of the heating element 100 reaches its maximum within 1 second after heating stops. That is to say, the time delay between the temperature rise curve and the pulse heating power curve is less than 1 second, and this smaller time delay is beneficial for precise temperature control.

[0034] Furthermore, since the temperature of the heating element 100 decreases after the suction process, the correspondence between the temperature rise curve and the pulse heating power curve changes. Therefore, the suction process can be identified based on this change, and the number of suction ports can be calculated for corresponding control.

[0035] In some implementations, the pulse heating cycle is variable in the pulse heating method.

[0036] In other words, during the heating process of the heating element 100 by the control circuit 200, the length of the pulse heating cycle varies. For example, the first pulse heating cycle is 2 seconds, the second pulse heating cycle is 3 seconds, the third pulse heating cycle is 4 seconds, and so on. The pulse heating cycle fluctuates in different pulse heating processes to control the temperature fluctuation of the heating element 100. The longer the pulse heating cycle, the higher the temperature of the heating element 100. In this embodiment, the pulse heating power and pulse heating duty cycle can be fixed, and the temperature of the heating element 100 can be adjusted by regulating the pulse heating cycle.

[0037] In some implementations, in the pulse heating method, the pulse heating power is a variable.

[0038] In other words, during the heating process of the heating element 100 by the control circuit 200, the magnitude of the pulse heating power varies. For example, in one pulse heating cycle, the pulse heating power first changes from 60W to 65W, then from 65W to 75W, and so on. Within one pulse heating cycle, the pulse heating power fluctuates with time to control the temperature fluctuation of the heating element 100. The higher the pulse heating power, the higher the temperature of the heating element 100. In this embodiment, the pulse heating cycle and pulse heating duty cycle can be fixed, and the temperature of the heating element 100 can be adjusted by regulating the pulse heating power.

[0039] In some implementations, in the pulse heating mode, the pulse heating duty cycle is a variable.

[0040] In other words, during the heating process of the heating element 100 by the control circuit 200, the pulse heating duty cycle varies. For example, in the first pulse heating cycle, the pulse heating duty cycle is 10%; in the second pulse heating cycle, the pulse heating duty cycle is 20%; and in the third pulse heating cycle, the pulse heating duty cycle is 30%. The pulse heating duty cycle fluctuates in different pulse heating cycles to control the temperature fluctuation of the heating element 100. A higher pulse heating duty cycle results in a higher temperature for the heating element 100. In this embodiment, the pulse heating cycle and pulse heating power can be fixed, and the temperature of the heating element 100 can be adjusted by regulating the pulse heating duty cycle.

[0041] It should be noted that in some embodiments, multiple parameters of the pulse heating method, such as the pulse heating period, pulse heating power, and pulse heating duty cycle, can be changed simultaneously. That is, multiple parameters of the pulse heating period, pulse heating power, and pulse heating duty cycle are variable. For example, the pulse heating period and pulse heating power are variable, while the pulse heating duty cycle is fixed; or, the pulse heating period and pulse heating duty cycle are variable, while the pulse heating power is fixed; or, the pulse heating power and pulse heating duty cycle are variable, while the pulse heating period is fixed; or, the pulse heating period, pulse heating power, and pulse heating duty cycle are all variable.

[0042] Referring to Figures 1 to 3, in some embodiments, the heating element 100 includes an outer tube 20, a first electrode 110, a second electrode 120, and a temperature sensing component 80. Both the first electrode 110 and the second electrode 120 are at least partially disposed within the outer tube 20. The first electrode 110 and the second electrode 120 are positioned opposite each other and spaced apart, and plasma is generated between the first electrode 110 and the second electrode 120 when energized. The first electrode 110 includes a discharge end face 1104 facing the second electrode 120. Along the axial direction of the outer tube 20, the outer tube 20 includes a low-temperature section 23 on the side away from the discharge end face 1104 from the second electrode 120 and a high-temperature section 24 on the side closer to the second electrode 120. The temperature sensing component 80 is connected to the low-temperature section 23 and is used to detect the temperature of the low-temperature section 23. The control circuit 200 is configured to control the temperature of the high-temperature section 24 based on the temperature of the low-temperature section 23.

[0043] In this embodiment, the temperature of the low-temperature section 23 is detected by the temperature sensing component 80. This allows the control circuit 200 to adjust the voltage applied to the first electrode 110 and the second electrode 120 based on the temperature of the low-temperature section 23, thereby controlling the temperature of the high-temperature section 24. This achieves temperature fluctuation of the heating element 100 and improves the heating effect of the heating element 100 on the aerosol forming matrix 300. Furthermore, since the low-temperature section 23 is located on the side of the discharge end face 1104 away from the second electrode 120, its temperature is lower than that of the center of the discharge region 130. Connecting the temperature sensing component 80 to the low-temperature section 23 allows the temperature sensing component 80 to operate at a lower temperature, improving its heat resistance and reliability.

[0044] Specifically, plasma is a state of matter containing a large number of charged particles and neutral atoms and molecules, maintaining overall electrical neutrality. Plasma can be generated by the ionization of gas under the influence of an electric field. The plasma generation process can produce a large amount of heat; the highest temperature of the plasma generated between the first electrode 110 and the second electrode 120 can reach 2000℃, and the stable temperature range is 1000℃ to 1600℃. Therefore, the heating element 100 can utilize the plasma generation process and the high temperature of the plasma to heat the aerosol forming matrix 300, generating aerosols.

[0045] The outer tube 20 is a hollow tube that covers the first electrode 110 and the second electrode 120. The first electrode 110 and the second electrode 120 are opposite each other inside the outer tube 20 and are spaced apart by a predetermined distance. The area between the first electrode 110 and the second electrode 120 can be a discharge region 130, in which the first electrode 110 and the second electrode 120 discharge and form plasma. The inner wall of the outer tube 20 covers the discharge region 130, and the outer wall of the outer tube 20 can directly contact the aerosol formation matrix 300.

[0046] The outer tube 20 can be partially inserted into the aerosol forming matrix 300 along its own axial direction. The end of the outer tube 20 inserted into the aerosol forming matrix 300 can be closed and protrude outward to form a relatively sharp tapered end 21. The end of the outer tube 20 opposite to the tapered end 21 along the axial direction has an opening 230, and the end of the outer tube 20 with the opening 230 is an open end 22.

[0047] The first electrode 110 and the second electrode 120 can extend into the outer tube 20 through the opening 230. The second electrode 120 extends at least partially into the tapered end 21, and the portion of the first electrode 110 extending into the outer tube 20 is away from the tapered end 21 relative to the second electrode 120. The first electrode 110 can be cylindrical and substantially coaxial with the outer tube 20. One end of the first electrode 110 in the axial direction of the outer tube 20 is opposite at least a portion of the second electrode 120 and is a discharge end 111. The other end of the first electrode 110 in the axial direction of the outer tube 20 can be a conductive end 112, which can be partially exposed outside the outer tube 20 through the opening 230.

[0048] The first electrode 110 includes a discharge end face 1104 facing the second electrode 120. The discharge end face 1104 is the position on the first electrode 110 with the shortest distance from the second electrode 120, opposite to the second electrode 120 and spaced at a predetermined distance. The discharge region 130 is located between the discharge end face 1104 and the side surface of the second electrode 120 facing the first electrode 110. The direction along the axial direction of the outer tube 20 from the conical end 21 to the open end 22 is from top to bottom. The second electrode 120 is located above the first electrode 110, limiting the upper boundary of the discharge region 130, and the discharge end face 1104 limits the lower boundary of the discharge region 130. When the first electrode 110 and the second electrode 120 are connected to a high voltage, plasma is generated in the discharge region 130, that is, the region above the discharge end face 1104, causing heat to concentrate in the region below the second electrode 120 and above the discharge end face 1104.

[0049] Along the axial direction of the outer tube 20, the outer tube 20 includes a low-temperature section 23 on the side of the self-discharge end face 1104 away from the second electrode 120 and a high-temperature section 24 on the side of the self-discharge end face 1104 close to the second electrode 120. A temperature sensing component 80 is connected to the low-temperature section 23 and is used to detect the temperature of the low-temperature section 23. In some embodiments, the temperature sensing component 80 is connected to a control circuit 200, and the temperature sensing component 80 transmits the detected temperature of the low-temperature section 23 to the control circuit 200. The control circuit 200 controls the temperature of the high-temperature section 24 based on the temperature of the low-temperature section 23 to achieve temperature fluctuation of the heating element 100 and improve the heating effect of the heating element 100 on the aerosol forming matrix 300.

[0050] Please refer to Figures 2 and 3. In some embodiments, the temperature measuring component 80 includes a temperature sensing part 81 and a conductive part 82 connected to the temperature sensing part 81. The temperature sensing part 81 is disposed in the low temperature section 23.

[0051] In this way, the temperature sensing part 81 is connected to the circuit through the conductive part 82, and the temperature of the low temperature section 23 can be obtained by detecting the resistance value of the temperature sensing part 81 in the circuit.

[0052] Specifically, the temperature sensing part 81 is the portion of the temperature measuring assembly 80 whose resistance value changes significantly with the temperature of the low-temperature section 23. The temperature sensing part 81 can directly contact the low-temperature section 23. The portion of the low-temperature section 23 in contact with the temperature sensing part 81 is the target area for temperature detection by the temperature measuring assembly 80. In some embodiments, the temperature sensing part 81 is disposed on the outer or inner wall of the low-temperature section 23. In this way, the temperature sensing part 81 can effectively sense the temperature of the low-temperature section 23, thereby calculating the temperature of the high-temperature section 24, which is the heating temperature of the aerosol forming matrix 300 by the outer tube 20, making the temperature control of the heating element 100 more precise.

[0053] The conductive part 82 can extend from the temperature sensing part 81 along the axial direction of the outer tube 20 toward the open end 22. The conductive part 82 can be connected to the temperature measuring wire from the open end 22, and connected to the control circuit 200 through the temperature measuring wire. It should be noted that the conductive part 82 and the temperature sensing part 81 can be different parts of an integrally formed component, or they can be two different components in contact and connected.

[0054] The conductive part 82 can serve as an electrode, electrically connected to the temperature sensing part 81 and the control circuit 200 to form a conductive circuit. The conductive part 82 can be connected to the control circuit 200 by soldering leads or conductive spring contacts. The control circuit 200 can calculate the change in resistance of the temperature sensing part 81 by detecting the change in voltage in the circuit, and then calculate the temperature of the target area being measured.

[0055] It is understandable that, since the outer tube 20 transfers heat from the discharge region 130 to the aerosol forming matrix 300 through infrared radiation and heat transfer, the high temperature of the plasma arc at the center of the discharge region 130 can exceed 2000℃, with a stable temperature of 1000℃~1600℃. The high-temperature section 24 is located on the side of the self-discharge end face 1104 of the outer tube 20 near the second electrode 120, and corresponds to the discharge region 130. Therefore, the temperature of the high-temperature section 24 is generally high, making it inconvenient to install a temperature sensing element 81 to collect the temperature. In other words, if a temperature sensing element 81 is to be installed in the high-temperature section 24 to collect the temperature, the high-temperature resistance of the temperature sensing element 81 must be high, and the structural requirements of the high-temperature section 24 must also be high. The temperature of the high-temperature section 24 generally has a corresponding relationship with the temperature of the low-temperature section 23. For example, the temperature of the high-temperature section 24 is generally higher than the temperature of the low-temperature section 23 by a predetermined range. Therefore, in this embodiment, a temperature sensing unit 81 can be provided in the low-temperature section 23. The low-temperature section 23 is located on the side of the self-discharge end face 1104 of the outer tube 20 away from the second electrode 120. The low-temperature section 23 corresponds to the non-central region of plasma generation, so that the temperature of the temperature sensing unit 81 is not too high, and the temperature of the high-temperature section 24 can be determined based on the temperature of the low-temperature section 23 to regulate the temperature of the high-temperature section 24. Referring to Figures 9 and 10, when the temperature of the high-temperature section 24 is controlled according to the temperature of the low-temperature section 23, the temperature of the high-temperature section 24 is delayed by milliseconds relative to the temperature of the low-temperature section 23, and after cooling down through the suction process, it can recover to the set temperature within one or two pulse heating cycles.

[0056] In the process of controlling the temperature of the high-temperature section 24 based on the temperature of the low-temperature section 23, control can be achieved through proportional-integral-differential (PID) regulation. The regulation parameters, as shown in Figure 11, may include proportional coefficient, integral time, derivative time, upper and lower limits of the pulse heating cycle, pulse heating power, and pulse heating duty cycle (where the initial temperature control corresponds to the preheating stage described later, and the subsequent temperature control corresponds to the heat preservation stage described later). PID regulation can precisely control the temperature of the heating element 100.

[0057] Referring to Figures 9 and 10, a preset temperature for the low-temperature segment 23 of the heating element 100 can be established. Through pulse heating, the temperature of the low-temperature segment 23 can be controlled to fluctuate along the preset temperature. The preset temperature (as shown in Figures 9 and 10) can be any value on the target temperature fluctuation curve of the low-temperature segment 23 of the heating element 100. For example, the preset temperature can be a peak value, a midpoint value, a trough value, or a value in between on the target temperature fluctuation curve. By collecting the temperature of the low-temperature segment 23 and controlling the pulse heating mode of the control circuit 200, the temperature of the low-temperature segment 23 can fluctuate along the preset temperature. Since there is a corresponding relationship between the temperature of the low-temperature segment 23 and the temperature of the high-temperature segment 24, when the temperature of the low-temperature segment 23 (as shown in the temperature feedback of the low-temperature segment 23 in Figures 9 and 10) fluctuates along the preset temperature, the temperature of the high-temperature segment 24 (as shown in the temperature feedback of the high-temperature segment 24 in Figures 9 and 10) will also fluctuate along the desired fluctuation curve of the high-temperature segment 24, thereby achieving temperature control of the high-temperature segment 24.

[0058] In some implementations, the pulse heating cycle is greater than 1 second in the pulse heating method.

[0059] For example, the pulse heating cycle can be 1.1s, 1.2s, 1.3s, 1.4s, 1.5s, etc. This ensures the heating duration and effect of each cycle. It should be noted that when the pulse heating cycle is variable, each pulse heating cycle is greater than 1s.

[0060] Referring to Figure 8, each pulse heating cycle may include an arc initiation phase, a constant power maintenance phase, and an arc cessation phase. The total duration of the three phases constitutes one pulse heating cycle, which is greater than 1 second. The arc initiation phase is used to raise the temperature of the heating element 100, the constant power maintenance phase is used to maintain the temperature of the heating element 100, and the arc cessation phase corresponds to the temperature decrease of the heating element 100. This prevents temperature fluctuations in the heating element 100, while avoiding continuous heating of the heating element 100 by the control circuit 200, which could lead to the aerosol generation matrix 300 burning and affect the lifespan of the control circuit 200.

[0061] In some embodiments, the heating process of the heating element 100 by the control circuit 200 includes a preheating stage and a heat preservation stage. In the preheating stage, the pulse heating power in the pulse heating mode is a first pulse heating power, and the pulse heating cycle is a first pulse heating cycle. In the heat preservation stage, the pulse heating power in the pulse heating mode is a second pulse heating power, and the pulse heating cycle is a second pulse heating cycle. Wherein, the first pulse heating power is greater than the second pulse heating power, and the first pulse heating cycle is less than the second pulse heating cycle.

[0062] Specifically, the preheating stage may include one or more pulse heating cycles. The heat preservation stage may also include one or more pulse heating cycles. The preheating stage is the initial stage of the control circuit 200 heating the heating element 100, used to raise the heating element 100 from a lower initial temperature to a higher stable temperature. The heat preservation stage is the middle and later stage of the control circuit 200 heating the heating element 100, used to maintain the heating element 100 at a temperature fluctuating around the stable temperature.

[0063] Since the preheating stage requires a rapid temperature rise to achieve rapid preheating, a larger first pulse heating power and a smaller first pulse heating cycle can be used in the preheating stage to achieve high-power, short-cycle heating. On the other hand, the heat preservation stage does not require a significant temperature increase, but only maintains overall stability with slight fluctuations. Therefore, a smaller first pulse heating power and a larger first pulse heating cycle can be used in the heat preservation stage to achieve low-power, long-cycle heating.

[0064] In some embodiments, the heating process of the heating element 100 by the control circuit 200 includes a preheating stage and a heat preservation stage. The outer tube 20 of the heating element 100 includes a low-temperature section 23 and a high-temperature section 24. In the preheating stage, the control circuit 200 heats the high-temperature section 24 according to a predetermined pulse heating power to control the temperature of the high-temperature section 24. In the heat preservation stage, the control circuit 200 controls the temperature of the high-temperature section 24 according to the temperature of the low-temperature section 23.

[0065] Specifically, the predetermined pulse heating power can be determined based on empirical values, such as a pulse heating power variation curve. During the pre-setting stage, the pulse heating power is directed according to this variation curve to heat the high-temperature section 24, causing its temperature to rise rapidly and achieving rapid preheating. During the heat preservation stage, since the heating element 100 has already preheated and the user may have already started sucking, precise temperature control of the high-temperature section 24 is necessary to ensure optimal taste. The specific control method can be as described above: collecting the temperature of the low-temperature section 23 and using this temperature to heat the high-temperature section 24, thereby controlling its temperature.

[0066] Referring to Figure 6, in some embodiments, the heating process of the heating element 100 by the control circuit 200 includes a preheating stage. During the preheating stage, the heating element 100 is heated to 350°C for a duration of less than or equal to 1.5 seconds.

[0067] Specifically, when the temperature of the heating element 100 rises to 350°C, preheating can be initially achieved to meet the user's sucking experience. When the heating element 100 takes less than or equal to 1.5 seconds to reach 350°C, the preheating speed of the heating element 100 is relatively fast, resulting in a better user experience.

[0068] In summary, in the aerosol generating apparatus 1000 of this application, the control circuit 200 uses plasma pulse heating to heat the heating element 100. Plasma heating is characterized by rapid temperature rise and fall, resulting in a smaller time delay between the heating curve and the heating power. This facilitates precise temperature control of the heating element 100, preventing the aerosol generating matrix 300 from burning and ensuring good taste. Furthermore, the pulse heating method in plasma heating can control the temperature fluctuations of the heating element 100, enriching the kinetic reactions of the heating process and further improving the taste.

[0069] 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," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships 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. 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 indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0070] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0071] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0072] The foregoing disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0073] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," and "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with an embodiment or example that are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0074] Although embodiments of this application have been shown and described above, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. An aerosol-generating device, wherein, The heating body comprises: a heating body; and a control circuit configured to heat the heating body in a plasma pulse heating mode. In the pulse heating mode, the pulse heating period is variable.

2. The aerosol-generating device of claim 1, wherein, In the pulse heating mode, the pulse heating power is variable. 3.The aerosol generating device of claim 1, wherein, In the pulse heating mode, the pulse heating duty cycle is variable.

4. The aerosol-generating device of claim 1, wherein, The heating body comprises an outer tube, a first electrode, a second electrode, and a temperature measuring assembly, the first electrode and the second electrode are both at least partially arranged in the outer tube, the first electrode and the second electrode are oppositely and spacedly arranged, and plasma is generated between the first electrode and the second electrode when the first electrode and the second electrode are electrified; 5.The aerosol generating device of claim 1, wherein, The first electrode comprises a discharge end face facing the second electrode, and along the axial direction of the outer tube, the outer tube comprises a low-temperature section away from the second electrode on one side of the discharge end face and a high-temperature section close to the second electrode on the other side, the temperature measuring assembly is connected with the low-temperature section, the temperature measuring assembly is used to detect the temperature of the low-temperature section, and the control circuit is configured to control the temperature of the high-temperature section according to the temperature of the low-temperature section. The temperature measuring assembly comprises a temperature sensing part and a conductive part connected with the temperature sensing part, and the temperature sensing part is arranged in the low-temperature section.

6. The aerosol-generating device of claim 5, wherein, In the pulse heating mode, the pulse heating period is greater than 1s. 7.The aerosol-generating device of claim 1, wherein, The heating process of the heating body by the control circuit comprises a preheating phase and a holding phase; 8.The aerosol generating device of claim 1, wherein, In the preheating phase, the pulse heating power in the pulse heating mode is a first pulse heating power, and the pulse heating period is a first pulse heating period; In the holding phase, the pulse heating power in the pulse heating mode is a second pulse heating power, and the pulse heating period is a second pulse heating period; Wherein, the first pulse heating power is greater than the second pulse heating power, and the first pulse heating period is less than the second pulse heating period. The heating process of the heating body by the control circuit comprises a preheating phase and a holding phase, and the outer tube of the heating body comprises a low-temperature section and a high-temperature section; 9.The aerosol generating device of claim 1, wherein, In the preheating phase, the control circuit heats the high-temperature section according to a predetermined pulse heating power to control the temperature of the high-temperature section; In the holding phase, the control circuit controls the temperature of the high-temperature section according to the temperature of the low-temperature section. The heating process of the heating body by the control circuit comprises a preheating phase, and in the preheating phase, the heating body is heated to 350℃ for a time period less than or equal to 1.5s. 10.The aerosol generating device of claim 1, wherein, ​

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