Aerosol generating device and its control method

Abstract

The aerosol generating device and control method thereof include an aerosol generating device including a cavity (A) for removably receiving an aerosol-generating product (40) including a magnetic material (43), a heater (10) for heating the aerosol-generating product (40) received in the cavity (A) to generate an aerosol, a detection circuit (32) including a capacitor (C2) connected in series with the heater (10), and a controller (31) configured to control a direct current to flow through the detection circuit (32) and determine that the aerosol-generating product (40) has been received in the cavity (A) or that the aerosol-generating product (40) has been removed from the cavity (A) based on the duration until a potential difference across the capacitor (C2) reaches a predetermined potential difference threshold. The device determines whether an aerosol-generating product (40) is inserted into the heating cavity (A) based on the time it takes for the potential difference across the capacitor (C2) to reach a predetermined potential difference threshold, and then controls the operation of the heater (10), with a simple implementation and improved user experience.

Description

Technical Field

[0001] (Cross - reference to related applications) This application claims the priority of the Chinese patent application with application number 202111048301.8, titled "Aerosol Generator and Its Control Method", filed with the China National Intellectual Property Administration on September 8, 2021, and all its contents are incorporated herein by reference. This application relates to the field of smoking devices, and particularly to an aerosol generator and its control method.

Background Art

[0002] Tobacco products such as cigarettes and cigars generate smoke by burning tobacco during use. As an alternative to these products that burn tobacco, attempts have been made to manufacture products that release compounds without combustion. An example of such a product is a heat - not - burn product, which releases compounds by heating tobacco rather than burning it.

[0003] The patent document with publication number CN111511233A discloses an aerosol generator and its operating method. An electromagnetic conductor is provided on the rolled tobacco, a detector with a coil is provided in the aerosol generator, and electromagnetic induction occurs between the coil and the electromagnetic conductor, so that the characteristic change of the current generated by electromagnetic induction and flowing through the coil can be detected, and the insertion state in which the rolled tobacco is inserted into the aerosol generator can be determined.

Summary of the Invention

[0004] The purpose of this application is to provide an aerosol generator and its control method that are different from the conventional cigarette insertion detection method.

[0005] On the one hand, this application a cavity for removably receiving an aerosol - generating product containing a magnetic material, and a heater for heating the aerosol - generating product received in the cavity to generate an aerosol. A detection circuit including a capacitor connected in series to the heater; A controller configured to control a direct current to flow through the detection circuit and determine that the aerosol generating product has been received in the cavity or determine that the aerosol generating product has been removed from the cavity based on a duration until a potential difference across the capacitor reaches a predetermined potential difference threshold. An aerosol generating device is provided.

[0006] On the other hand, the present application is a control method for an aerosol generating device including a cavity, a heater, and a detection circuit including a capacitor connected in series to the heater, Controlling a direct current to flow through the detection circuit; Determining that the aerosol generating product has been received in the cavity or determining that the aerosol generating product has been removed from the cavity based on a duration until a potential difference across the capacitor reaches a predetermined potential difference threshold. A control method for an aerosol generating device is provided.

[0007] The aerosol generating device and its control method provided in the present application determine whether a cigarette is inserted into a heating cavity based on the time when the potential difference across the capacitor reaches a predetermined potential difference threshold, and further control the operation of the heater. The implementation method is simple and the user experience is improved.

Brief Description of the Drawings

[0008] One or more embodiments will be exemplarily described with reference to the figures in the accompanying drawings. These exemplary descriptions do not limit the embodiments. Elements with the same reference numerals in the drawings indicate similar elements, and unless otherwise specified, the figures in the accompanying drawings do not limit the scale.

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0009] For the convenience of understanding the present application, the present application will be described in more detail below in association with the drawings and specific embodiments. It should be noted that when an element is described as being "fixed" to another element, it may be directly located on the other element or there may be one or more intervening elements therebetween. When an element is described as being "connected" to another element, it may be directly connected to the other element or there may be one or more intervening elements therebetween. The terms "upper", "lower", "left", "right", "inner", "outer" and similar descriptions used in this specification are for illustrative purposes only.

[0010] Unless otherwise defined, all technical terms and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the art of the present application. In this specification, the terms used in the description of the present application are for the purpose of explaining specific embodiments only and are not for the purpose of limiting the present application. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0011] FIG. 1 is a schematic diagram of an aerosol generator provided in an embodiment of the present application. The aerosol generator includes a cavity A in which an aerosol generating product 40 is removably received, and When the aerosol generating product 40 is received in the cavity A, a heater 10 that is inserted into the aerosol generating product 40 to perform heating and generate aerosol, a battery cell 20 for supplying power, and a circuit board 30 provided between the battery cell 20 and the heater 10. On the circuit board 30, various circuits for controlling the aerosol generating device, such as controlling the battery cell 20 to supply power to the heater 10, are integrated.

[0012] The aerosol generating product 40 preferably employs a tobacco-containing material that releases a volatile compound from the base material during heating, or may be a non-tobacco material suitable for electrically heated smoking after heating. The aerosol generating product 40 preferably employs a solid base material and may include one or more of powders, particles, elongated fragments, strips or sheets of one or more of vanilla leaves, tobacco leaves, homogenized tobacco, expanded tobacco, or the solid base material may include additional tobacco or non-tobacco volatile flavor compounds so as to be released when the base material is heated. In some examples, the aerosol generating product 40 includes a liquid base material, or a carrier carrying the liquid base material, or a container carrying the liquid base material.

[0013] It should be noted that the heating method of the heater 10 includes, but is not limited to, resistance heating, electromagnetic heating, and infrared heating. As an exemplary embodiment, the shape of the heater 10 includes, but is not limited to, needle-shaped, pin-shaped, tubular or sheet-shaped.

[0014] It should be further noted that, unlike the example of FIG. 1, in other examples, the heater 10 is configured to heat so as to surround at least a part of the aerosol generating product 40, that is, so-called circumferential heating or peripheral heating is also possible.

[0015] FIG. 2 is a schematic diagram of the aerosol generating product provided in the embodiment of the present application.

[0016] The aerosol generating product 40 includes a filter segment 41 and an aerosol generating segment 42 having a material that can be sucked. In a preferred embodiment, a magnetic material 43 is provided in the aerosol generating product 40. The magnetic material 43 can adopt a ferromagnetic material or other materials with a magnetic permeability of about 100 H / m or more. The magnetic material 43 can be, for example, a coating formed on the outer surface of the aerosol generating product 40 so as to be provided near the lower end of the aerosol generating segment 42, or a component provided on the outer surface of the aerosol generating product 40. Alternatively, the magnetic material 43 is inside the aerosol generating product 40 and is mixed with the material that can be sucked.

[0017] FIG. 3 is a schematic diagram of a controller provided in an embodiment of the present application, and FIG. 4 is a schematic diagram of a detection circuit and a switching transistor circuit provided in an embodiment of the present application.

[0018] In this example, the controller 31, the detection circuit 32, and the switching transistor circuit 33 are integrated on the circuit board 30. Of course, they may be integrated on another circuit board. The controller 31 adopts an MCU (Micro Controller Unit). In other examples, it can be understood that the controller 31 may use a dedicated integrated chip or other chips having a processor function.

[0019] In this example, the controller 31 has a TEST_VCC port, a TEST_AIN port, a PWM_0UT_P port, and a PWM_0UT_N port.

[0020] The detection circuit 32 includes a resistor R2 and a capacitor C2, and the resistor R2, the capacitor C2, and the heater 10 are connected in series. Specifically, one end of the resistor R2 is electrically connected to the TEST_VCC port of the controller 31, the other end of the resistor R2 is electrically connected to one end of the heater 10 (shown as WH+ in the figure), the other end of the heater 10 (shown as WH- in the figure) is electrically connected to one end of the capacitor C2 and the TEST_AIN port of the controller 31, and the other end of the capacitor C2 is connected to the ground.

[0021] The switching transistor circuit 33 includes a switching transistor Q3, a switching transistor Q5, and a switching transistor Q7. In this example, the switching transistor Q3 and the switching transistor Q7 employ NMOS transistors, and the switching transistor Q5 employs a PMOS transistor. The PWM_OUT_P port of the controller 31 is electrically connected to the gate of the switching transistor Q3, the drain of the switching transistor Q3 is electrically connected to the gate of the switching transistor Q5, and the source of the switching transistor Q3 is grounded. The source of the switching transistor Q5 is electrically connected to the battery cell 20 (shown as VBAT in the figure), and the drain of the switching transistor Q5 is electrically connected to one end of the heater 10 (shown as WH+ in the figure). The PWM_OUT_N port is electrically connected to the gate of the switching transistor Q7, the drain of the switching transistor Q7 is electrically connected to the other end of the heater 10 (shown as WH- in the figure), and the source of the switching transistor Q7 is grounded. For the electrical connection relationship with other elements, reference can be made to FIG. 3. The switching transistor circuit 33 is configured to be able to conduct or cut off the electrical connection between the heater 10 and the battery cell 20 (shown as VBAT in the figure).

[0022] In this example, the controller 31 is configured to output a control signal to control the switching transistor circuit 33 to turn off, and when the switching transistor circuit 33 is turned off and after the timing time of the timer is reached, control the detection circuit 32 so that a direct current flows, and based on the duration until the potential difference across the capacitor C2 reaches a predetermined potential difference threshold value, determine that the aerosol generating product 40 has been received in the cavity A or determine that the aerosol generating product 40 has been removed from the cavity A, and further control the operation of the heater 10.

[0023] Specifically, the controller 31 controls the PWM_OUT_P port to output a low level, turning off the switching transistor Q3, further turning off the switching transistor Q5, and controls the PWM_OUT_N port to output a low level, turning off the switching transistor Q7, thereby disconnecting the electrical connection between the heater 10 and the battery cell 20.

[0024] A timer (not shown) is integrated in the controller 31, and by means of the timing wake-up function, it starts the function of determining whether the aerosol generating product 40 has been received in the cavity A, and controls the operation of the heater 10, that is, controls the heater 10 to start or stop heating.

[0025] The controller 31 can control the TEST_VCC port to output a high level so that a direct current flows through the detection circuit 32.

[0026] As shown in FIG. 4, the heater 10 can be equivalent to a series connection of a resistor R and an inductance L. The resistor R has a fixed value, but the inductance amount of the inductance L is related to whether the aerosol generating product 40 has been received in the cavity A, that is, related to the insertion of the aerosol generating product 40 into the cavity A.

[0027] The circuit impedance of the detection circuit 32 Formula Can be represented by JPEG0007684516000001.jpg1180. In the formula, |Z| is the circuit impedance, X L Is the inductive reactance of the inductance L, and X c2 Is the capacitive reactance of the capacitor C2.

[0028] When the inductance amount of the inductance L changes, it affects the magnitude of the circuit impedance |Z| and further changes the charging time of the capacitor C2. Specifically, when the aerosol generating product 40 is inserted into the cavity A, the aerosol generating product 40 equipped with a magnetic material can increase the inductance amount of the inductance L and increase the circuit impedance |Z|.

[0029] Therefore, after the controller 31 controls the TEST_VCC port to output a high level, when the aerosol generating product 40 is not inserted into the cavity A and when the aerosol generating product 40 is inserted into the cavity A, the charging times before and after the capacitor C2 are different. The charging time of the capacitor C2 when the aerosol generating product 40 is inserted into the cavity A is longer than the charging time of the capacitor C2 when the aerosol generating product 40 is not inserted into the cavity A.

[0030] Based on the above principle, it can be determined that the aerosol generating product 40 has been received into the cavity A or the aerosol generating product 40 has been removed from the cavity A based on the duration until the potential difference across the capacitor C2 reaches a predetermined potential difference threshold, and further, the operation of the heater 10 can be controlled.

[0031] In this example, the TEST_AIN port of the controller 31 is an interrupt port, and a timer (not shown) is integrated in the controller 31.

[0032] When the controller 31 controls the TEST_VCC port to output a high level, it controls the timer to start timing, and interrupts when the potential difference across the capacitor C2 reaches a predetermined potential difference threshold, obtains the timing time of the timer, and based on the timing time of the timer, determines that the aerosol generating product 40 has been received into the cavity A or the aerosol generating product 40 has been removed from the cavity A, and is further configured to control the operation of the heater 10.

[0033] In this example, the predetermined potential difference threshold may be at a high level, and may be the potential difference across both ends when the capacitor C2 is fully charged, or may be lower than the potential difference across both ends when the capacitor C2 is fully charged.

[0034] As an alternative embodiment, the duration until the potential difference across the capacitor C2 reaches the predetermined potential difference threshold can be compared with the predetermined time threshold.

[0035] When the duration until the potential difference across the capacitor C2 reaches the predetermined potential difference threshold is greater than the predetermined time threshold, it can be determined that the aerosol generating product 40 has been received in the cavity A. In this case, a control signal (for example, a square wave signal) is output to control and operate the switching transistor circuit 33, and further the heater 10 is activated to perform heating.

[0036] When the duration until the potential difference across the capacitor C2 reaches the predetermined potential difference threshold is less than or equal to the predetermined time threshold, it can be determined that the aerosol generating product 40 has not been received in the cavity A. In this case, the switching transistor circuit 33 is controlled to remain off, that is, the heater 10 is in an unheated state.

[0037] Here, the predetermined time threshold can be the duration until the potential difference across the capacitor C2 reaches the predetermined potential difference threshold when the aerosol generating product 40 is not received in the cavity A.

[0038] Based on the above determination, when the aerosol generating product 40 is inserted into the cavity A, the heater 10 can be automatically controlled to start heating, without the need for button operation, improving the user experience. On the other hand, when the aerosol generating product 40 that does not contain a magnetic material is inserted into the cavity A, the change in the circuit impedance |Z| is very small. Therefore, the time until the potential difference across the capacitor C2 reaches the predetermined potential difference threshold hardly changes. In this case, the heater 10 is not automatically controlled to start heating, and can play a role in preventing forgery.

[0039] As another alternative embodiment, it is possible to determine the difference between the duration until the potential difference across the capacitor C2 reaches a predetermined potential difference threshold and a predetermined time threshold. When the difference is less than or equal to a predetermined difference threshold and greater than zero, a control signal (e.g., a square wave signal) is output to control and operate the switching transistor circuit 33, and further the heater 10 is activated for heating. When the difference is greater than the predetermined difference threshold or the difference is less than or equal to zero, the switching transistor circuit 33 is controlled to remain off.

[0040] In this embodiment, the aerosol generating product 40 provided with the magnetic material can make the time interval when the aerosol generating product 40 is inserted into the cavity A and when the aerosol generating product 40 is not inserted into the cavity A constant due to the consistency of the magnetic material. Therefore, by determining that the difference between the duration until the potential difference across the capacitor C2 reaches a predetermined potential difference threshold and a predetermined time threshold is within a predetermined range, it can be determined that the aerosol generating product 40 has been received in the cavity A, and the heater 10 can be automatically controlled to start heating without the need for a button operation, improving the user experience. Otherwise, when the difference between the duration until the potential difference across the capacitor C2 reaches a predetermined potential difference threshold and a predetermined time threshold is greater than a predetermined difference threshold, it can be determined that the aerosol generating product 40 is a counterfeit product, and in this case, the heater 10 is not controlled to start heating. Further, when the difference between the duration until the potential difference across the capacitor C2 reaches a predetermined potential difference threshold and a predetermined time threshold is less than or equal to zero, it can be determined that the aerosol generating product 40 is not inserted into the cavity A, and in this case as well, the heater 10 is not controlled to start heating.

[0041] In the above two embodiments, when the heater 10 is controlled to start heating, when the heater 10 is in the heating gap, it is possible to restart the determination of whether the aerosol generating product 40 is received in the cavity A. When the aerosol generating product 40 is inserted into the cavity A, heating continues, and when the aerosol generating product 40 is removed from the cavity A, heating stops. The determination process can refer to the foregoing embodiments.

[0042] It should be noted that in this example, the heating gap refers to the time range between two adjacent high levels (or low levels) in the square wave signal.

[0043] Furthermore, it should be noted that, different from the above example, in other examples, the controller 31 may not need to interrupt, that is, the TEST_AIN port is a general port. In this case, when the potential difference across the capacitor C2 reaches a predetermined potential difference threshold, the controller 31 obtains the timing time of the timer. The subsequent process is similar to the foregoing, and the description is omitted here.

[0044] FIG. 5 is a schematic diagram of a control method for an aerosol generating device provided in an embodiment of the present application. The aerosol generating device is consistent with the foregoing content, and the description is omitted here.

[0045] The method includes: step S11 of controlling the detection circuit 32 so that a direct current flows through it; step S12 of determining that the aerosol generating product 40 is received in the cavity A or determining that the aerosol generating product 40 is removed from the cavity A based on the duration until the potential difference across the capacitor C2 reaches a predetermined potential difference threshold.

[0046] In one example, the method includes: a step of controlling a timer to start timing when controlling the detection circuit 32 so that a direct current flows through it; a step of obtaining the timing time of the timer when the potential difference across the capacitor C2 reaches a predetermined potential difference threshold. Based on the timing time of the timer, determining that the aerosol generating product 40 has been received in the cavity A or determining that the aerosol generating product 40 has been removed from the cavity A, and including.

[0047] In one example, the method Outputting a first control signal to control the switching transistor circuit 33 to turn off, and When the switching transistor circuit 33 is turned off, controlling so that a direct current flows through the detection circuit 32, and Based on the duration until the potential difference across the capacitor C2 reaches a predetermined potential difference threshold value, determining that the aerosol generating product 40 has been received in the cavity A or determining that the aerosol generating product 40 has been removed from the cavity A, and including.

[0048] In one example, based on the duration until the potential difference across the capacitor C2 reaches a predetermined potential difference threshold value, the step of determining that the aerosol generating product 40 has been received in the cavity A or determining that the aerosol generating product 40 has been removed from the cavity A is Comparing the duration until the potential difference across the capacitor C2 reaches a predetermined potential difference threshold value with a predetermined time threshold value, and When the duration until the potential difference across the capacitor C2 reaches a predetermined potential difference threshold value is greater than the predetermined time threshold value, outputting a second control signal to control the switching transistor circuit 33 to operate, and further starting the heater 10 to perform heating, and When the duration until the potential difference across the capacitor C2 reaches a predetermined potential difference threshold value is less than or equal to the predetermined time threshold value, controlling the switching transistor circuit 33 to remain off, and including.

[0049] In one example, based on the duration until the potential difference across the capacitor C2 reaches a predetermined potential difference threshold value, the step of determining that the aerosol generating product 40 has been received in the cavity A or determining that the aerosol generating product 40 has been removed from the cavity A is Determining a difference between a duration until a potential difference across the capacitor C2 reaches a predetermined potential difference threshold and a predetermined time threshold; When the difference is equal to or less than a predetermined difference threshold and greater than zero, outputting a third control signal to control and operate the switching transistor circuit 33, and further starting the heater 10 to perform heating; When the difference is greater than a predetermined difference threshold, controlling the switching transistor circuit to remain off, and the method includes the steps.

[0050] In one example, the method includes: When the timing time of the timer is reached, controlling a direct current to flow through the detection circuit 32; Based on a duration until a potential difference across the capacitor C2 reaches a predetermined potential difference threshold, determining that the aerosol generating product 40 has been received in the cavity A, or determining that the aerosol generating product 40 has been removed from the cavity A, and the method includes the steps.

[0051] FIG. 6 is a schematic diagram of a control process of an aerosol generating device provided in an embodiment of the present application.

[0052] Specifically, the control process includes the following steps S21, S22, S23, S24, S25, S26, S27, and S28.

[0053] In step S21, the switching transistor circuit 33 is turned off. The controller 31 controls the PWM_OUT_P port to output a low level, turns off the switching transistor Q3, further turns off the switching transistor Q5, and at the same time, controls the PWM_OUT_N port to output a low level, turns off the switching transistor Q7, and thus disconnects the electrical connection between the heater 10 and the battery cell 20.

[0054] In step S22, it is determined whether the timing time of the timer has been reached. The function of determining whether the aerosol generating product 40 has been received into the cavity A is started by the timing wake-up function, and the operation of the heater 10 is controlled. If the timing time of the timer has not been reached, the switching transistor circuit 33 is left off.

[0055] In step S23, when controlling the TEST_VCC port to output a high level, the timer is controlled to start timing.

[0056] In step S24, it is determined whether the TEST_AIN port has received an interrupt signal.

[0057] In step S25, the timing time of the timer is acquired. For example, when the high-level signal is interrupted, the timing time of the timer is read by the interrupt program.

[0058] In step S26, it is determined whether the timing time of the timer is greater than a predetermined time threshold. If it is greater than the predetermined time threshold, step S27 is executed; otherwise, it can be determined that the aerosol generating product 40 has not been received into the cavity A, the switching transistor circuit 33 is left off, and it waits for timing wake-up.

[0059] In steps S27 and S28, it is determined that the aerosol generating product 40 has been received into the cavity A. In this case, a square wave signal is output to control the switching transistor circuit 33, and further the heater 10 is activated for heating.

[0060] It should be noted that although the preferred embodiments of the present application have been shown in the specification and drawings of the present application, the present application can be implemented in many different forms and is not limited to the embodiments described in this specification. These embodiments are not additional restrictions on the content of the present application, but are provided to more finely, deeply and completely understand the disclosure content of the present application. In addition, continuously combining the above technical features with each other to form various embodiments not listed above are all considered to be within the scope described in the specification of the present application. Furthermore, those skilled in the art can make improvements or modifications based on the above description, and all of these improvements and modifications shall fall within the protection scope of the claims appended to the present application.

Claims

1. A cavity for removably receiving an aerosol generating product containing a magnetic material, a heater for heating the aerosol generating product received in the cavity to generate an aerosol, a detection circuit including a capacitor connected in series with the heater, a controller configured to control a direct current to flow through the detection circuit and to determine that the aerosol generating product has been received in the cavity or has been removed from the cavity based on a duration until a potential difference across the capacitor reaches a predetermined potential difference threshold. An aerosol generating device, characterized by comprising:

2. The aerosol generating device according to claim 1, wherein the detection circuit further includes a resistor connected in series.

3. The controller includes a first port, one end of the detection circuit is electrically connected to the first port, and the other end is electrically connected to ground, The aerosol generating device according to claim 1, wherein the controller is configured to control the first port to output a high level so that a direct current flows through the detection circuit.

4. The controller includes a second port, one end of the capacitor is electrically connected to the second port and the heater, and the other end is electrically connected to ground, The controller further includes a timer, When the controller controls the first port to output a high level, the controller controls the timer to start timing, acquires the potential difference across the capacitor by the second port, and when the potential difference across the capacitor reaches a predetermined potential difference threshold, acquires the timing time of the timer, and is configured to determine that the aerosol generating product has been received in the cavity or has been removed from the cavity based on the timing time of the timer. The aerosol generating device according to claim 3.

5. The controller includes an interrupt port, one end of the capacitor is electrically connected to the interrupt port and the heater, and the other end is electrically connected to ground, The controller further includes a timer, When the controller controls the first port to output a high level, it controls the timer to start timing, and interrupts when the potential difference across the capacitor reaches a predetermined potential difference threshold, obtains the timing time of the timer, and based on the timing time of the timer, determines that the aerosol generating product has been received in the cavity or determines that the aerosol generating product has been removed from the cavity. The aerosol generating device according to claim 3, characterized in that it is configured as such.

6. Further comprising a switching transistor circuit, The switching transistor circuit is configured to be able to conduct or cut off the electrical connection between the heater and the battery cell, The controller outputs a first control signal to control the switching transistor circuit to turn off, and when the switching transistor circuit is turned off, controls so that direct current flows through the detection circuit, and based on the duration until the potential difference across the capacitor reaches a predetermined potential difference threshold, determines that the aerosol generating product has been received in the cavity or determines that the aerosol generating product has been removed from the cavity, and is further configured to control the switching transistor circuit. The aerosol generating device according to claim 1, characterized in that it is configured as such.

7. The controller compares the duration until the potential difference across the capacitor reaches a predetermined potential difference threshold with a predetermined time threshold. When the duration until the potential difference across the capacitor reaches a predetermined potential difference threshold is greater than the predetermined time threshold, it outputs a second control signal to control the switching transistor circuit to operate, and further starts the heater to perform heating. When the duration until the potential difference across the capacitor reaches a predetermined potential difference threshold is less than or equal to the predetermined time threshold, it is configured to control the switching transistor circuit to remain off. The aerosol generating device according to claim 6, characterized in that it is configured as such.

8. The controller determines a difference between a duration until a potential difference across the capacitor reaches a predetermined potential difference threshold and a predetermined time threshold, and when the difference is equal to or less than a predetermined difference threshold and greater than zero, outputs a third control signal to control and operate the switching transistor circuit, and further activates the heater to perform heating. When the difference is greater than the predetermined difference threshold or the difference is equal to or less than zero, the switching transistor circuit is configured to be controlled to remain off. The aerosol generator according to claim 6, characterized in that.

9. When the heater is in a heating gap, the controller controls the detection circuit to allow direct current to flow again, and based on the duration until the potential difference across the capacitor reaches a predetermined potential difference threshold, determines that the aerosol generating product has been received in the cavity or determines that the aerosol generating product has been removed from the cavity. The aerosol generator according to claim 7 or 8, characterized in that.

10. The controller further includes a timer, When the timing time of the timer is reached, the controller controls the detection circuit to allow direct current to flow, and based on the duration until the potential difference across the capacitor reaches a predetermined potential difference threshold, determines that the aerosol generating product has been received in the cavity or determines that the aerosol generating product has been removed from the cavity. The aerosol generator according to claim 1, characterized in that.

11. A control method for an aerosol generator including a cavity, a heater, and a detection circuit including a capacitor connected in series to the heater, Controlling the detection circuit to allow direct current to flow, Based on the duration until the potential difference across the capacitor reaches a predetermined potential difference threshold, determining that the aerosol generating product has been received in the cavity or determining that the aerosol generating product has been removed from the cavity. A control method for an aerosol generator, characterized by including.

12. The aerosol generator further includes a timer, The method includes, When controlling the detection circuit to allow direct current to flow, controlling the timer to start timing, When the potential difference across the capacitor reaches a predetermined potential difference threshold value, obtaining the elapsed time of the timer; Based on the elapsed time of the timer, determining that the aerosol generating product has been received in the cavity or determining that the aerosol generating product has been removed from the cavity, the method according to claim 11, characterized by comprising the above.

13. The aerosol generating device further includes a switching transistor circuit, The method includes: Outputting a first control signal to control the switching transistor circuit to turn off; When the switching transistor circuit is turned off, controlling so that direct current flows through the detection circuit; Based on the duration until the potential difference across the capacitor reaches a predetermined potential difference threshold value, determining that the aerosol generating product has been received in the cavity or determining that the aerosol generating product has been removed from the cavity, and further controlling the switching transistor circuit, the method according to claim 11, characterized by comprising the above.

14. Based on the duration until the potential difference across the capacitor reaches a predetermined potential difference threshold value, determining that the aerosol generating product has been received in the cavity or determining that the aerosol generating product has been removed from the cavity, and further controlling the switching transistor circuit, specifically: Comparing the duration until the potential difference across the capacitor reaches a predetermined potential difference threshold value with a predetermined time threshold value; When the duration until the potential difference across the capacitor reaches a predetermined potential difference threshold value is greater than the predetermined time threshold value, outputting a second control signal to control the switching transistor circuit to operate, and further starting the heater to perform heating; When the duration until the potential difference across the capacitor reaches a predetermined potential difference threshold value is less than or equal to the predetermined time threshold value, controlling the switching transistor circuit to remain off, the method according to claim 13, characterized by comprising the above.

15. Based on the duration until the potential difference across the capacitor reaches a predetermined potential difference threshold value, determining that the aerosol generating product has been received in the cavity or determining that the aerosol generating product has been removed from the cavity, specifically: Determining a difference between a duration until a potential difference across the capacitor reaches a predetermined potential difference threshold and a predetermined time threshold; When the difference is equal to or less than a predetermined difference threshold and greater than zero, outputting a third control signal to control and operate the switching transistor circuit, and further starting the heater to perform heating; When the difference is greater than the predetermined difference threshold, controlling the switching transistor circuit to remain off, the method according to claim 13, characterized by comprising.

16. The aerosol generating device further includes a timer, The method includes: Controlling so that a direct current flows through the detection circuit when a timing time of the timer is reached; Based on a duration until a potential difference across the capacitor reaches a predetermined potential difference threshold, determining that the aerosol generating product has been received in the cavity or determining that the aerosol generating product has been removed from the cavity, the method according to claim 11, characterized by comprising.

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