Aerosol-generating device

Abstract

The invention discloses an aerosol generating device. The aerosol generating device comprises a heating body and a control circuit. The control circuit is configured to heat the heating element by a plasma pulse heating method. According to the aerosol generating device, the control circuit adopts a plasma pulse heating mode to heat the heating body. The plasma heating has the characteristic of rapid heating and cooling, so that the time delay between the heating curve and the heating power is relatively small, the temperature of the heating body can be accurately controlled, the phenomenon that the aerosol generating substrate is burnt is avoided, and the taste is ensured. And by adopting a pulse heating mode in plasma heating, the temperature fluctuation of the heating body can be controlled, the kinetic reaction in the heating process is enriched, and the taste is further improved.

Description

Technical Field

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

[0002] Current aerosol generating devices typically use traditional resistance heating to heat the heating element. Because resistance heating involves continuous heating at low power, the heating element cools and rises slowly, resulting in a significant time delay between the heating curve and the heating power. This leads to substantial errors in heating element temperature control, affecting the taste. Summary of the Invention

[0003] This application provides an aerosol generating apparatus to solve at least one of the aforementioned technical problems.

[0004] The aerosol generating apparatus according to the embodiments of this application includes:

[0005] Heating element; and

[0006] A control circuit configured to heat the heating element using plasma pulse heating.

[0007] In some embodiments, the pulse heating period is a variable amount in the pulse heating method.

[0008] In some embodiments, the pulse heating power is a variable amount in the pulse heating method.

[0009] In some embodiments, the pulse heating duty cycle in the pulse heating mode is a variable.

[0010] In some embodiments, the heating element includes an outer tube, a first electrode, a second electrode, and a temperature measuring component. The first electrode and the second electrode are at least partially disposed inside the outer tube. The first electrode and the second electrode are opposite to each other and spaced apart. When the first electrode and the second electrode are energized, plasma is generated between the first electrode and the second electrode.

[0011] The first electrode includes a discharge end face facing the second electrode. Along the axial direction of the outer tube, the outer tube includes a low-temperature section on the side away from the second electrode from the discharge end face and a high-temperature section on the side close to the second electrode. The temperature measuring component is connected to the low-temperature section and is used to detect the temperature of the low-temperature section. The control circuit is configured to control the temperature of the high-temperature section according to the temperature of the low-temperature section.

[0012] In some embodiments, the temperature measuring component includes a temperature sensing part and a conductive part connected to the temperature sensing part, wherein the temperature sensing part is disposed in the low temperature range.

[0013] In some embodiments, the pulse heating cycle is greater than 1 second in the pulse heating method.

[0014] In some embodiments, the heating process of the heating element by the control circuit includes a preheating stage and a heat preservation stage;

[0015] During the preheating stage, the pulse heating power in the pulse heating method is the first pulse heating power, and the pulse heating cycle is the first pulse heating cycle;

[0016] During the heat preservation stage, the pulse heating power in the pulse heating method is the second pulse heating power, and the pulse heating cycle is the second pulse heating cycle;

[0017] 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.

[0018] In some embodiments, the heating process of the heating element by the control circuit includes a preheating stage and a heat preservation stage, and the outer tube of the heating element includes a low-temperature section and a high-temperature section;

[0019] During the preheating stage, the control circuit heats the high-temperature section according to a predetermined pulse heating power to control the temperature of the high-temperature section.

[0020] During the heat preservation stage, the control circuit controls the temperature of the high-temperature section based on the temperature of the low-temperature section.

[0021] In some embodiments, the heating process of the heating element by the control circuit includes a preheating stage, in which the heating element is heated to 350°C for a duration of less than or equal to 1.5 seconds.

[0022] In the aerosol generating apparatus of this application, the control circuit employs plasma pulse heating to heat the heating element. 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, preventing the aerosol generating matrix from burning and ensuring optimal taste. Furthermore, the pulse heating method within plasma heating allows for control of temperature fluctuations in the heating element, enriching the kinetic reactions during the heating process and further enhancing the taste.

[0023] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0024] 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:

[0025] Figure 1 This is a schematic diagram of the structure of an aerosol generating apparatus according to certain embodiments of this application;

[0026] Figure 2 This is a schematic diagram of the structure of the heating element in some embodiments of this application;

[0027] Figure 3 yes Figure 2 A schematic diagram of the cross-sectional structure of the heating element along the AA direction;

[0028] Figure 4 This is a schematic diagram of the temperature rise curve of the heating element when resistance heating is used in related technologies;

[0029] Figure 5 This is a schematic diagram of the temperature rise curve of the heating element when using plasma pulse heating in certain embodiments of this application;

[0030] Figure 6 yes Figure 5 A schematic diagram of part of the heating curve;

[0031] Figure 7 This 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.

[0032] Figure 8 This 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.

[0033] Figure 9 This is a schematic diagram illustrating the control of the temperature of a high-temperature section based on the temperature of a low-temperature section in certain embodiments of this application;

[0034] Figure 10 yes Figure 9 A partial curve diagram;

[0035] Figure 11 This is a schematic diagram of temperature control parameters in some embodiments of this application.

[0036] Explanation of reference numerals in the attached figures:

[0037] 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

[0038] 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.

[0039] Please see 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.

[0040] 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.

[0041] 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.

[0042] In related technologies, aerosol generating devices typically employ traditional resistance heating to heat the heating element. Because resistance heating provides continuous heating at low power, the heating element experiences slow temperature rise and fall (e.g., ...). Figure 4 As shown in the figure, there is a significant time delay between the heating curve and the heating power, which leads to a large error in the temperature control of the heating element and affects the taste.

[0043] The aerosol generating apparatus 1000 according to the present application has at least the following advantages:

[0044] First, since plasma heating uses air as the heating medium, it does not have the risk of melting compared to resistance heating.

[0045] Secondly, because the plasma generation process releases a large amount of heat, the heating power of plasma heating can be set relatively high (up to 100W or more), and 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, preventing the aerosol generation matrix 300 from burning and ensuring good taste. Figure 5 and Figure 6 As shown, when plasma heating is used in the embodiments of this application, the heating element 100 can be rapidly heated to above 350°C, meeting the requirements for rapid preheating.

[0046] Third, in traditional resistance heating methods, the temperature rise curve of the heating element is smooth with no obvious fluctuations (e.g., Figure 4 As shown), only the suction process causes temperature fluctuations in the heating element. However, the embodiment of this application uses pulse heating in plasma heating, which can control the temperature fluctuations of the heating element 100 (e.g., Figure 5 As shown in the diagram, this enriches the kinetic reactions of the heating process, further improving the taste. Furthermore, during pulse heating, the heat transfer of the heating element 100 mainly 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 taste of the aerosol.

[0047] It is understandable that with traditional resistance heating, if pulse heating is used, the temperature control delay time is also 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 accordingly, and the time delay between the heating curve and the power curve is smaller. Figure 7 and Figure 8 As shown, 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 the small time delay is beneficial for precise temperature control.

[0048] 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.

[0049] In some implementations, the pulse heating cycle is variable in the pulse heating method.

[0050] 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.

[0051] In some implementations, in the pulse heating method, the pulse heating power is a variable.

[0052] 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.

[0053] In some implementations, in the pulse heating mode, the pulse heating duty cycle is a variable.

[0054] 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.

[0055] 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.

[0056] Please see 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] Please see Figure 2 and Figure 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, and the temperature sensing part 81 is disposed in the low temperature section 23.

[0065] Thus, by connecting the temperature sensing part 81 to the circuit through the conductive part 82, 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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, thereby regulating the temperature of the high-temperature section 24. Please refer to... Figure 9 and Figure 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.

[0070] 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 are as follows: Figure 11As shown, parameters 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 front-end temperature control corresponds to the preheating stage described later, and the back-end temperature control corresponds to the heat preservation stage described later). PID control can precisely achieve temperature control of the heating element 100.

[0071] Please see Figure 9 and Figure 10 The set temperature of the low-temperature section 23 of the heating element 100 can be preset, and the temperature of the low-temperature section 23 can be controlled to fluctuate along the set temperature through pulse heating. The set temperature (e.g., Figure 9 and Figure 10 (As shown) can be any value on the target temperature fluctuation curve of the low-temperature segment 23 of the heating element 100. For example, the set temperature can be the peak value, median value, trough value, or a temperature value between the three 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 be made to fluctuate along the set 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 (e.g., ...) is... Figure 9 and Figure 10 When the temperature feedback of the medium and low temperature range 23 fluctuates along the set temperature, the temperature of the high temperature range 24 (e.g., Figure 9 and Figure 10 The temperature feedback of the medium-high temperature section 24 will also fluctuate along the expected fluctuation curve of the high temperature section 24, thereby achieving temperature control of the high temperature section 24.

[0072] In some implementations, the pulse heating cycle is greater than 1 second in the pulse heating method.

[0073] 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.

[0074] Please see 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 raises the temperature of the heating element 100, the constant power maintenance phase maintains the temperature of the heating element 100, and the arc cessation phase corresponds to a decrease in the temperature of the heating element 100. This prevents temperature fluctuations in the heating element 100, avoids continuous heating of the heating element 100 by the control circuit 200, which could lead to the aerosol generation matrix 300 burning, and also reduces the lifespan of the control circuit 200.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] Please see Figure 6In 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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, characterized in that, include: Heating element; and A control circuit configured to heat the heating element using plasma pulse heating.

2. The aerosol generating apparatus according to claim 1, characterized in that, In the pulse heating method, the pulse heating period is a variable.

3. The aerosol generating apparatus according to claim 1, characterized in that, In the pulse heating method, the pulse heating power is a variable.

4. The aerosol generating apparatus according to claim 1, characterized in that, In the pulse heating method, the pulse heating duty cycle is a variable.

5. The aerosol generating apparatus according to claim 1, characterized in that, The heating element includes an outer tube, a first electrode, a second electrode, and a temperature measuring component. The first electrode and the second electrode are at least partially disposed inside the outer tube. The first electrode and the second electrode are opposite to each other and spaced apart. When the first electrode and the second electrode are energized, plasma is generated between the first electrode and the second electrode. The first electrode includes a discharge end face facing the second electrode. Along the axial direction of the outer tube, the outer tube includes a low-temperature section on the side away from the second electrode from the discharge end face and a high-temperature section on the side close to the second electrode. The temperature measuring component is connected to the low-temperature section and is used to detect the temperature of the low-temperature section. The control circuit is configured to control the temperature of the high-temperature section according to the temperature of the low-temperature section.

6. The aerosol generating apparatus according to claim 5, characterized in that, The temperature measuring component includes a temperature sensing part and a conductive part connected to the temperature sensing part, wherein the temperature sensing part is disposed in the low temperature range.

7. The aerosol generating apparatus according to claim 1, characterized in that, In the pulse heating method, the pulse heating period is greater than 1 second.

8. The aerosol generating apparatus according to claim 1, characterized in that, The heating process of the heating element by the control circuit includes a preheating stage and a heat preservation stage; During the preheating stage, the pulse heating power in the pulse heating method is the first pulse heating power, and the pulse heating cycle is the first pulse heating cycle; During the heat preservation stage, the pulse heating power in the pulse heating method is the second pulse heating power, and the pulse heating cycle is the second pulse heating cycle; 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.

9. The aerosol generating apparatus according to claim 1, characterized in that, The heating process of the heating element by the control circuit includes a preheating stage and a heat preservation stage, and the outer tube of the heating element includes a low-temperature section and a high-temperature section. During the preheating stage, the control circuit heats the high-temperature section according to a predetermined pulse heating power to control the temperature of the high-temperature section. During the heat preservation stage, the control circuit controls the temperature of the high-temperature section based on the temperature of the low-temperature section.

10. The aerosol generating apparatus according to claim 1, characterized in that, The heating process of the heating element by the control circuit includes a preheating stage, in which the heating element is heated to 350°C for a duration of less than or equal to 1.5 seconds.

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