Aerosol generating device and control method

Abstract

An aerosol generating device (200) and a control method. The aerosol generating device (200) comprises: a power supply (210); a heating assembly (220), electrically connected to the power supply (210) and used for directly or indirectly heating an aerosol generating product (100) to generate aerosol; a vaping detector (230), configured to detect a vaping action of a user and generate at least one first electrical parameter when a vaping action occurs, different first electrical parameters being used for representing different vaping types; and a controller (240), configured to receive the first electrical parameter, and on the basis of a pre-stored correspondence between different first electrical parameters and the range of power output by the power supply (210), control the power supply (210) to provide power for the heating assembly (220) according to a corresponding power range within at least part of the duration of a current vaping action.

Description

Aerosol generation device and control method

[0001] Cross-reference of related applications

[0002] This application claims priority to Chinese Patent Application No. 202410495771.6, filed on April 23, 2024, entitled "Aerosol Generating Apparatus and Control Method", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of aerosol generation technology, and particularly to aerosol generation apparatus and control method. Background Technology

[0004] An aerosol generating device is a device that can generate aerosols from tobacco products.

[0005] In some exemplary prior art, the aerosol generating device includes a power source, a heating element, and a container for holding the tobacco product. Some of the heat released by the heating element accumulates in the tobacco product, causing its temperature to rise and producing smoke. When the user inhales, some of the heat is carried away from the tobacco product, causing its temperature to drop. The power source provides electricity to the heating element during inhalation, enabling it to generate heat and quickly restore the tobacco product to a preset temperature.

[0006] However, the amount of heat removed varies depending on the user's inhalation strength and duration. Therefore, existing technologies typically face three problems: 1. Excessive heat from the heating element leads to over-accumulation of heat in the tobacco product, causing it to burn or ignite; 2. Excessive heat from the heating element results in the next puff of smoke being too hot to drink; 3. Insufficient heat from the heating element prevents the tobacco product from quickly producing enough smoke to satisfy the next puff after the current inhalation. Summary of the Invention

[0007] The purpose of this application is to provide an aerosol generating apparatus and control method that can ensure appropriate heat in the aerosol generated product.

[0008] An aerosol generating apparatus provided in this application includes:

[0009] power supply;

[0010] Heating components, electrically connected to a power source, are used to directly or indirectly heat aerosol-generating products to produce aerosols;

[0011] A suction detector is configured to detect a user’s suction action and generate at least one first electrical parameter when a suction action occurs, with different first electrical parameters used to characterize different suction types.

[0012] The controller is configured to receive a first electrical parameter and, based on a pre-stored correspondence between different first electrical parameters and the power output range of the power supply, control the power supply to provide power to the heating component according to the corresponding power range for at least a portion of the time period during which the current suction action continues.

[0013] As an example, the controller is also configured to identify the suction type based on a first electrical parameter, and when the suction type is identified as consistent across multiple suction actions, the control power supply provides different amounts of power to the heating component for the duration of each suction action.

[0014] As an example, for multiple suction actions of the same suction type, the power supplied by the controller power supply to the heating component during the duration of the suction action at port M is greater than the power supplied to the heating component during the duration of the suction action at port N, where M and N are both positive integers, and N is greater than M.

[0015] As an example, the controller is also configured to identify the suction type based on a first electrical parameter, and when the suction type is identified as consistent across multiple suction actions, the control power supply provides the same power to the heating component for the duration of each suction action.

[0016] As an example, the controller controls the heating element to have different cooling rates under different suction types; or

[0017] The controller controls the heating element to have different cooling durations under different suction types; or

[0018] The controller ensures that the heating components have approximately the same cooling rate under different suction types.

[0019] As an example, during at least a portion of the duration of the current suction action, the amount of power supplied by the controller to the heating component varies; or

[0020] For at least a portion of the time during the current suction action, the controller controls the power supply to maintain a constant amount of electricity to the heating component.

[0021] As an example, the aerosol generating device also includes a first temperature detector connected to a heating assembly for detecting the temperature of the heating assembly, and a controller connected to the first temperature detector to obtain the temperature of the heating assembly; or

[0022] The controller is electrically connected to the heating element to obtain a second electrical parameter of the heating element related to temperature.

[0023] As an example, the controller is also configured to increase the power supplied to the heating component to raise its temperature when the temperature of the heating component is below a preset lower limit during the duration of the suction action.

[0024] As an example, the controller is also configured to identify the end of the suction action based on a first electrical parameter, and control the power supply to increase the power supplied to the heating component when the suction action ends, so as to heat up the heating component.

[0025] As an example, the controller is configured to reduce the power supplied to the heating component or stop supplying power to the heating component for a preset duration after the current suction action ends, when the duration of the current suction action is less than a first threshold; and to increase the power supplied to the heating component for a preset duration after the current suction action ends, when the duration of the current suction action is greater than a second threshold.

[0026] As an example, suction types include heavy suction, light suction, and normal suction. The airflow velocity during heavy suction is greater than that during normal suction, and the airflow velocity during light suction is less than that during normal suction.

[0027] The controller controls the power supply to the heating element to be greater during the duration of heavy suction than it provides during the duration of normal suction; and / or

[0028] The controller controls the power supply to the heating element for at least a portion of the time during mild suction, which is less than the power supplied for at least a portion of the time during normal suction; and / or

[0029] The controller controls the power supplied to the heating element during the duration of heavy suction, ensuring that the temperature drop of the heating element at the end of the heavy suction cycle is approximately equal to the temperature drop at the end of the normal suction cycle; and / or

[0030] The controller controls the power supply provided to the heating element during the duration of the mild suction, so that the temperature drop of the heating element at the end of the mild suction action is basically equal to the temperature drop of the heating element at the end of the normal suction action.

[0031] As an example, the aerosol generating apparatus further includes a receiving tube having a receiving cavity and an air inlet channel communicating with the outside and the receiving cavity, the receiving cavity being used to receive at least a portion of the aerosol-generated article; the suction detector includes an airflow detector configured to detect the velocity of the airflow in the air inlet channel and generate a first electrical parameter based on the airflow velocity.

[0032] As an example, the aerosol generating apparatus also includes a receiving tube having a receiving cavity for receiving at least a portion of the aerosol-generated article; the heating assembly includes a gas flow heater having an air vent for providing air into the receiving cavity, the gas flow heater being positioned upstream of the receiving cavity along the air flow direction;

[0033] The suction detector includes a second temperature detector disposed adjacent to the airflow heater and located upstream of at least a portion of the air vents, and generates a first electrical parameter based on the temperature it detects.

[0034] As an example, the containment tube is an insulated tube, and at least a portion of the airflow heater is contained within the containment tube.

[0035] As an example, the airflow heater includes a porous body with pores and a heating element for heating the porous body, with a second temperature detector spaced apart from the heating element.

[0036] As an example, the second temperature detector is spaced apart from the porous body, and the distance between the second temperature detector and the porous body is between 0.5 mm and 5 mm.

[0037] This application provides a control method for an aerosol generating device. The aerosol generating device includes a receiving cavity for accommodating at least a portion of an aerosol generating article, and further includes a suction detector, a power supply, and a heating component for heating the aerosol generating article. The power supply is electrically connected to the heating component to provide power to the heating component. The method includes:

[0038] The suction detector is controlled to detect the user's suction action. When a suction action occurs, the suction detector generates at least one first electrical parameter.

[0039] The system acquires a first electrical parameter and, based on the pre-stored correspondence between different first electrical parameters and the power output range of the power source, controls the power source to provide power to the heating component according to the corresponding power range for at least a portion of the time period during which the current suction action continues.

[0040] The above aerosol generating apparatus and control method include a power supply, a heating component, a suction detector, and a controller. The heating component is used to directly or indirectly heat the aerosol generating product to produce aerosols. The suction detector is used to detect the user's suction action and generate at least one first electrical parameter when the suction action occurs. Different first electrical parameters are used to characterize different suction types. The controller is used to receive the first electrical parameter and, based on the pre-stored correspondence between different first electrical parameters and the power output range of the power supply, control the power supply to provide power to the heating component according to the corresponding power range for at least a portion of the duration of the current suction action. Therefore, based on the user's suction action, targeted power supply to the heating component can be implemented for at least a portion of the duration of the current suction action, which helps to ensure that the aerosol generating product maintains appropriate heat after each suction. Attached Figure Description

[0041] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0042] Figure 1 is a schematic diagram of an aerosol generating apparatus provided in an embodiment of this application;

[0043] Figure 2 is a schematic diagram showing the connection of at least some functional modules in an aerosol generating apparatus provided in an embodiment of this application;

[0044] Figure 3 is a schematic diagram of the temperature curves of the heating component in the existing aerosol generation device of this application under different suction types;

[0045] Figure 4 shows the temperature curve of the heating component and the temperature curve detected by the second temperature detector according to an embodiment of this application.

[0046] Figure 5 is a schematic diagram of the heating assembly and receiving tube provided in an embodiment of this application;

[0047] Figure 6 is a schematic diagram showing the connection between the heating assembly and the suction detector provided in an embodiment of this application;

[0048] Figure 7 is a cross-sectional view of Figure 6;

[0049] Figure 8 is a schematic diagram of a control method provided in an embodiment of this application;

[0050] In the diagram: 100, Aerosol generating product; 101, Aerosol generating matrix; 102, Filter nozzle; 200, Aerosol generating device; 210, Power supply; 220, Heating component; 221, Gas flow heater; 2211, Porous body; 2212, Heating element; 2213, Pore; 2214, Notch; 222, Holder; 223, Support; 230, Suction detector; 231, Second temperature detector; 2311, First thermocouple wire; 2312, Second thermocouple wire; 2313, Metal temperature sensing element; 240, Controller; 250, First temperature detector; 260, Receiving tube; 261, Receiving cavity; 262, Gas layer; 270, Inlet channel. Detailed Implementation

[0051] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0052] The terms "first," "second," and "third" used in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number or order of the indicated technical features. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship or movement of the components in a specific orientation (as shown in the accompanying drawings). If the specific orientation changes, the directional indication will also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0053] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0054] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be intervening elements. When an element is referred to as being "connected to" another element, it can be directly connected to the other element, or there may be one or more intervening elements. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0055] Referring to Figure 1, one embodiment of this application provides an aerosol generating apparatus 200, which is an apparatus 200 capable of engaging with an aerosol generating article 100 and interacting with the aerosol generating article 100 to generate aerosols.

[0056] Aerosol-generating article 100 includes an aerosol-generating matrix 101, which is a substance capable of generating aerosols upon temperature increase or under the influence of ultrasound or microwaves. The aerosol-generating matrix 101 may be a volatile compound intended to be released to form an aerosol through heating rather than combustion. The aerosol-generating matrix 101 may be in solid form, such as an aggregate formed from tobacco shreds, leaves, or particles. The aerosol-generating matrix 101 may include tobacco-containing materials containing volatile tobacco flavor compounds released from the matrix upon heating, or the tobacco-containing materials may be nicotine-containing substances. The aerosol-generating matrix 101 may include non-tobacco-containing materials. The aerosol-generating matrix 101 may simultaneously contain both tobacco-containing and non-tobacco-containing materials.

[0057] In the embodiment shown in Figure 1, the aerosol generating article 100 further includes a filter tip 102. After the aerosol generating article 100 is attached to the aerosol generating device 200, the filter tip 102 is exposed outside the aerosol generating device 200 for the user to hold in their mouth. The user draws in the aerosol generated by the aerosol forming matrix 101 by sucking on the filter tip 102. In other embodiments, the aerosol generating device includes a mouthpiece for the user to hold in their mouth. After the aerosol generating article is attached to the aerosol generating device, the aerosol generating article can be completely concealed within the aerosol generating device. The user draws in the aerosol generated by the aerosol forming matrix 101 by sucking on the mouthpiece.

[0058] The aerosol generating device 200 includes a power source 210 and a heating element 220. The power source 210 can be any suitable battery, such as a lithium battery. The heating element 220 is electrically connected to the power source 210 to generate heat based on the power supplied by the power source 210.

[0059] In some embodiments, the heating assembly 220 can directly heat the aerosol-generating article 100, and such heating assembly 220 includes an external heating element and / or an internal heating element.

[0060] In this application, "external heating element" refers to a heating element that, when the aerosol generating article 100 is engaged with the aerosol generating apparatus 200, is at least partially located outside the aerosol generating article 100, and whose heat can radiate or transfer to the sidewalls or bottom of the aerosol generating article 100. For example, the external heating element includes a tubular heating body, in which at least a portion of the aerosol generating article 100 is surrounded by the tubular heating body when the aerosol generating article 100 is engaged with the aerosol generating apparatus 200. For example, the external heating element includes a bottom heating body, in which the bottom of the aerosol generating article 100 is supported by the bottom heating body when the aerosol generating article 100 is engaged with the aerosol generating apparatus 200.

[0061] In this application, "internal heating element" refers to a heating element that is at least partially located inside the aerosol generating article 100 when it is engaged with the aerosol generating apparatus 200. For example, the internal heating element includes a heating needle that is at least partially inserted into the interior of the aerosol generating article 100 when it is engaged with the aerosol generating apparatus 200.

[0062] In embodiments where the heating component 220 can directly heat the aerosol-generating article 100, the parts of the aerosol-generating article 100 that are in contact with or close to the heating component 220 are more likely to accumulate heat, making them more susceptible to burning or combustion compared to other parts.

[0063] In some embodiments, the heating component 220 can indirectly heat the aerosol generating article 100 by heating a heating medium and then the heated medium. For example, such a heating component 220 includes a gas flow heater 221 for heating air, which then releases heat as it flows into the aerosol generating article 100, thereby heating the aerosol generating article 100.

[0064] In embodiments where the heating component 220 can indirectly heat the aerosol generating article 100, the upstream portion of the aerosol generating article 100 is more prone to accumulating heat along the direction in which air enters the aerosol generating article 100, making it more susceptible to scorching or combustion compared to other portions.

[0065] Typically, one aerosol generator 100 produces enough aerosol for a user to inhale 6-20 times. However, this isn't limited to 6-20 inhalations. Users cannot guarantee consistent inhalation intensity and duration; for example, sometimes they inhale heavily, sometimes lightly. Therefore, if we disregard the user's inhalation type and instead apply a uniform power supply or temperature compensation strategy to the heating components or the aerosol generator during the inhalation duration, it's easy for at least a portion of the aerosol generator to become scorched or burned after one inhalation, or for the aerosol generated in the next inhalation to be too hot to drink, or for at least a portion of the aerosol generator to be insufficiently heated, resulting in insufficient aerosol production for the next inhalation. This leads to a poor user experience.

[0066] To address these issues, please refer to Figure 2. In one embodiment of this application, the aerosol generating apparatus 200 further includes a suction detector 230 and a controller 240. The suction detector 230 detects the user's suction action and generates at least one first electrical parameter when the user performs a suction action. Different first electrical parameters can characterize different suction types. The controller 240 is configured to receive and analyze the first electrical parameter. The controller 240 can identify the suction type based on the first electrical parameter. The controller 240 can control the power supply 210 to provide power to the heating component 220 for at least a portion of the duration of the suction action based on a pre-stored correspondence between different first electrical parameters or suction types and the power output range of the power supply 210. This ensures that the temperature change of the heating component 220 during at least a portion of the duration of the suction action is related to the current suction type, and that the heat provided by the heating component 220 to the aerosol generating article 100 under the current suction action is related to the heat carried away by the aerosol generating article 100 due to suction. In other words, when a user suction action occurs, the controller 240 can control the power supply 210 to use a power range corresponding to the current suction type or the current first electrical parameter based on the first electrical parameter related to the user suction action generated by the suction detector 230, so that the heating component 220 is powered for at least a part of the duration of the suction, and the cooling range and / or cooling rate of the heating component 220 are related to the current suction type.

[0067] Based on this, the controller 240 can identify the suction type based on the first electrical parameter, and the controller 240 has a pre-stored power output range of the power supply 210 corresponding to each suction type, or the controller 240 can read the power output range of the power supply 210 corresponding to each suction type from the memory. Thus, after the controller 240 obtains the first electrical parameter, it can identify the current suction type and control the power supply 210 to respond to the current suction type, providing power to the heating component 220 that is adapted to the current suction type for at least a part of the duration of the current suction action.

[0068] In one embodiment, the suction types include heavy suction, light suction, and general suction. The suction force during heavy suction is greater than the suction force during general suction, and the suction force during light suction is less than the suction force during general suction. This can be manifested in the following ways: the airflow velocity during heavy suction is greater than the airflow velocity during general suction, or the cooling rate of the heating component 220 or aerosol generating product 100 during heavy suction is greater than the cooling rate of the heating component 220 or aerosol generating product 100 during general suction; the airflow velocity during light suction is less than the airflow velocity during general suction, or the cooling rate of the heating component 220 or aerosol generating product 100 during light suction is less than the cooling rate of the heating component 220 or aerosol generating product 100 during general suction. The suction force during general suction is the suction force that the user typically uses, and is the suction force that the user most frequently or preferentially uses. The aerosol generating device can use machine learning to recognize the airflow velocity during a user's typical inhalation, thereby understanding the user's typical inhalation and, based on that, recognizing the user's heavy and light inhalation to match the specific user's inhalation habits.

[0069] As an example, the controller 240 controls the power supply 210 to provide more power to the heating component 220 during the duration of heavy suction than it provides during the duration of normal suction. In other words, the power supply 210 provides more energy to the heating component 220 during heavy suction than it provides during normal suction. It should be noted that the power supply 210 provides to the heating component 220 during the duration of heavy suction is an average power; similarly, the power supply 210 provides to the heating component 220 during the duration of heavy suction is also an average power. From the start of a suction action to its end, the power supply 210 provides to the heating component 220 can be a constant power or a variable power.

[0070] Please refer to Figure 3. The dashed line represents the preset heating curve 1A′ of the heating component, and the solid line represents the actual heating curve 2A′ of the heating component in the existing aerosol generating device during suction, where temperature fluctuations occur. In Figure 3, suction between t1′ and t2′ is considered normal suction, suction between t3′ and t4′ is considered heavy suction, suction between t5′ and t6′ is considered light suction, suction duration between t7′ and t8′ is less than the first threshold, and suction duration between t9′ and t10′ is greater than the second threshold.

[0071] Please refer to Figure 4. The dashed line represents the preset heating curve 1A of the heating component 220, and the solid line represents the actual heating curve 2A of the heating component 220 in the aerosol generating device provided in this application, where temperature fluctuations occur during suction. In Figure 4, suction between time periods t1 and t2 is considered normal suction, suction between time periods t3 and t4 is considered heavy suction, suction between time periods t5 and t6 is considered light suction, suction duration between time periods t7 and t8 is less than the first threshold, and suction duration between time periods t9 and t10 is greater than the second threshold. Please refer to Figure 4. The solid line near the time axis t represents the temperature curve 2B detected by the second temperature detector 231 in the aerosol generating device provided in this application.

[0072] When no suction occurs, the temperature of the heating component 220 is basically the target temperature on the corresponding heating curve 1A. When suction occurs, the temperature of the heating component 220 drops, thus falling below the target temperature at the corresponding time on the heating curve 1A. After the suction action ends or after the preset condition is triggered, the temperature of the heating component 220 will rise again and return to the target temperature at the corresponding time on the heating curve 1A.

[0073] However, compared to normal suction, heavy suction has a faster airflow velocity. If the power supply continues to provide power to the heating component using the same power range as normal suction during the duration of heavy suction (refer to Figure 3), the heating component and / or aerosol-generating product will have a cooling rate exceeding that of normal suction. Furthermore, after the heavy suction action ends, the heating component and / or aerosol-generating product will have a cooling amplitude exceeding that of normal suction. Consequently, during the preset heating time after the suction action ends, the temperature of the heating component cannot recover to the target temperature corresponding to the time of heating curve 1A′, or it is not conducive to the heating component and / or aerosol-generating product quickly recovering to the target temperature corresponding to the time of heating curve 1A′ within a short period of time after the suction action ends, which is not conducive to meeting the requirements of the next suction.

[0074] Therefore, in this example, the power supplied by power source 210 to heating component 220 during the duration of heavy suction is greater than the power supplied during the duration of normal suction. This reduces the cooling rate of heating component 220 during the duration of heavy suction, thereby reducing the cooling amplitude of heating component 220 from the start of heavy suction to the end of the heavy suction action. This facilitates the rapid recovery of heating component 220 to the target temperature corresponding to the time on heating curve 1A after the heavy suction action ends, thus fully heating aerosol generating product 100 and generating enough aerosol for the next suction. It also helps reduce impurities in the aerosol in the next suction, which is beneficial for improving the taste.

[0075] Furthermore, the controller 240 controls the power supply 210 to provide power to the heating component 220 during the duration of heavy aspiration, ensuring that the temperature drop of the heating component 220 at the end of the heavy aspiration is approximately equal to the temperature drop at the end of the normal aspiration. Therefore, after the heavy aspiration ends, the heating component 220 can achieve approximately the same rate or magnitude of temperature increase to return to the target temperature as after the normal aspiration. This helps ensure consistency in aerosol quantity and taste during each puff, and also simplifies the temperature increase algorithm after each puff, enabling the same heating power or energy after both the heavy and normal aspiration.

[0076] As an example, the controller 240 controls the power supply 210 to provide less power to the heating component 220 during at least a portion of the duration of light suction than it provides during at least a portion of the duration of normal suction. Therefore, it can increase the cooling rate of the heating component 220 during the duration of light suction, thereby increasing the cooling range of the heating component 220 from the start of light suction to the end of the light suction action. This helps to prevent a large amount of heat from accumulating in the aerosol generating article 100 during the duration of light suction, thereby preventing the aerosol generating article 100 from being burnt or ignited, or preventing the aerosol generated by the aerosol generating article 100 from being too hot to burn the mouth.

[0077] Furthermore, the controller 240 controls the power supply 210 to provide power to the heating component 220 during the duration of the light aspiration, ensuring that the temperature drop of the heating component 220 at the end of the light aspiration is approximately equal to the temperature drop at the end of the regular aspiration. Therefore, after the light aspiration ends, the heating component 220 can achieve a temperature rise rate or magnitude roughly the same as after the regular aspiration, thus helping to ensure consistency in aerosol quantity and taste during each puff.

[0078] In one embodiment, the controller 240 is configured to reduce the power supplied to the heating component 220 for a preset period of time after the suction action ends when the duration of the suction action of the current suction type is less than a first threshold, and to increase the power supplied to the heating component 220 when the duration of the suction action of the current suction type is greater than a second threshold, until the current suction action ends.

[0079] For example, when the current suction type is heavy suction, but the duration of heavy suction is short, less than the first threshold, then without intervention, this suction may remove less heat from the aerosol-generating article 100. Based on this, the intervention measures of this application may be: the power supply 210 reduces the power supplied to the heating component 220 within a preset time after the end of this suction action (for example, it continues to supply power within the power range of normal or light suction within a preset time after the end of this suction action), or stops supplying power to the heating component 220 within a preset time after the end of this suction action. In other words, after the end of this heavy suction action with a short duration, the heating component 220 is allowed to maintain the temperature it had at the end of the suction action for a period of time, or the temperature of the heating component 220 is allowed to continue to decrease for a period of time, and then the temperature of the heating component 220 is raised to the target temperature corresponding to the recovery heating curve 1A.

[0080] It can prevent a large amount of heat from accumulating in the aerosol generating product 100, thereby preventing the aerosol generating product 100 from being burnt or combusted, or preventing the temperature of the aerosol generated by the aerosol generating product 100 from being too high and scalding.

[0081] For example, if the current suction type is heavy suction, but the duration of this heavy suction is long, exceeding the second threshold, then without intervention, this suction may remove a large amount of heat from the aerosol-generating article 100. Based on this, the intervention measure of this application could be: the power supply 210 increases the power supplied to the heating component 220 before the current suction action ends, until the current suction action ends. In other words, between the time when the duration of this heavy suction reaches the second threshold and the time when this suction action ends, the cooling rate of the heating component 220 is reduced by increasing the power supplied to the heating component 220, or the temperature of the heating component 220 is maintained at the temperature reached when the second threshold is reached.

[0082] Therefore, reducing the temperature drop of the heating component 220 from the start to the end of the heavy suction action is beneficial for the heating component 220 to quickly return to the target temperature corresponding to the time on the heating curve 1A after the heavy suction action ends. This allows for sufficient heating of the aerosol generating product 100, enabling the aerosol generating product 100 to produce the amount of aerosol required for the next suction. It also helps reduce impurities in the aerosol in the next suction, which is beneficial for improving the taste.

[0083] As an example, the first threshold and the second threshold are equal and equal to the duration of a typical aspiration, for example, the first threshold and the second threshold can both be 2 seconds.

[0084] As an example, the first threshold is less than the second threshold. Generally, the duration of aspiration is between the first and second thresholds, and includes both the first and second thresholds. For example, the first threshold can be less than or equal to 1.8 seconds, and the second threshold can be greater than or equal to 2.2 seconds.

[0085] In one embodiment, the controller 240 can identify the start and end of the suction action based on the first electrical parameter, and control the power supply 210 to increase the power supplied to the heating component 220 when the suction action ends, so as to raise the temperature of the heating component 220 and restore the heating component 220 to the target temperature corresponding to the time on the heating curve.

[0086] In one embodiment, during the duration of the suction action, the controller 240 is further configured to control the power supply 210 to increase the power supplied to the heating component 220 when the temperature of the heating component 220 is lower than a preset lower limit value, so as to raise the temperature of the heating component 220 and prevent the temperature drop of the heating component 220 from being too large, which is conducive to the heating component 220 quickly recovering to the target temperature corresponding to the time on the heating curve 1A. In other words, if the temperature of the heating component 220 drops below the preset lower limit value before the suction action ends, the temperature of the heating component 220 is raised by increasing the power supplied to the heating component 220 by the power supply 210 while the suction action is still continuing. That is, the aforementioned "preset condition" includes the temperature of the heating component 220 dropping below the preset lower limit value.

[0087] In the embodiment that triggers this "preset condition", when the controller 240 identifies the end of the suction action based on the first electrical parameter, since the heating component 220 has already started to heat up, the controller 240 can control the power supply 210 not to respond to the end of the suction action, or the controller 240 can not send a control signal to the power supply 210.

[0088] Based on this embodiment, as an example, the aerosol generating device 200 further includes a first temperature detector 250, which is connected to the heating component 220 and is used to detect the temperature of the heating component 220. The controller 240 is connected to the first temperature detector 250 to obtain the temperature data of the heating component 220.

[0089] Alternatively, the controller 240 is electrically connected to the heating assembly 220 to obtain a second electrical parameter of the heating assembly 220 related to temperature. The controller 240 can then determine whether the temperature of the heating assembly 220 is below a preset lower temperature limit based on this second electrical parameter. The second electrical parameter can be an electrical parameter in the heating assembly 220 that changes with the temperature of the heating element, such as the resistance, resistivity, voltage, or current value.

[0090] In one embodiment, the heating component 220 is configured to cool down at a uniform rate for at least a portion of the duration of the suction action under the current suction type. For example, during the duration of the current suction action, the temperature of at least a localized area of ​​the heating component 220 decreases by approximately 2°C every 0.1 seconds.

[0091] In one embodiment, the heating component 220 is configured to gradually decrease its cooling rate during at least a portion of the duration of the suction action under the current suction type. For example, if the duration of a single suction is 2 seconds, the temperature of the heating component 220 decreases by approximately 2°C within the first 0.1 seconds from the start of the current suction action, and decreases by approximately 1°C within the last 0.1 seconds before the end of the current suction action.

[0092] In one embodiment, during at least a portion of the time the suction action lasts under the current suction type, the controller 240 controls the power supply 210 to vary the amount of power supplied to the heating assembly 220.

[0093] In one embodiment, for at least a portion of the time during which the suction action continues under the current suction type, the controller 240 controls the power supply 210 to provide a constant amount of power to the heating assembly 220.

[0094] In one embodiment, during the duration of the suction action, the controller 240 controls the cooling rate of the heating component 220 by controlling the amount of power supplied by the power supply 210 to the heating component 220.

[0095] Based on this, as an example, the controller 240 controls the heating component 220 to have different cooling rates under different suction types. For example, the cooling rate of the heating component 220 during the duration of heavy suction is different from that during the duration of light suction.

[0096] As an example, the controller 240 controls the heating component 220 to have the same cooling rate under different suction types. For instance, the cooling rate of the heating component 220 during the duration of heavy suction is essentially the same as the cooling rate during the duration of light suction. Furthermore, if the duration of the suction action is the same for both, their cooling amplitudes can also be approximately the same. Of course, other methods can also be used to ensure that the heating component 220 has approximately the same cooling amplitude under different suction types.

[0097] In one embodiment, the controller 240 is further configured to identify the suction type based on a first electrical parameter, and when the suction type is identified as consistent in multiple suction actions, the control power supply 210 provides the same power to the heating component 220 for the duration of each suction action.

[0098] For example, the controller 240 is configured to accumulate the number of suction ports based on a first electrical parameter, and when the corresponding number of suction ports is different but the suction type is the same, the control power supply 210 provides the same amount of power to the heating component 220 during the duration of each suction operation. That is, during the duration of each suction operation, the amount of power provided by the power supply 210 to the heating component 220 is not affected by the currently accumulated number of suction ports, but is mainly affected by the suction type to which the current suction operation belongs.

[0099] In one embodiment, the controller 240 is further configured to identify the suction type based on a first electrical parameter, and when multiple suction actions are identified as having the same suction type, the control power supply 210 provides different amounts of power to the heating component 220 for the duration of each suction action.

[0100] During the suction duration, the temperature drop rate of the heating component 220 is related to the ignition point of the aerosol generating product 100. When the ignition point of the aerosol generating product 100 is low, the temperature drop rate of the heating component 220 can be relatively fast; when the ignition point of the aerosol generating product 100 is high, the temperature drop rate of the heating component 220 can be relatively slow. As the heating duration of the aerosol generating product 100 by the heating component 220 increases, or as the number of suction ports of the aerosol generating product 100 increases, the dryness of the aerosol generating matrix 101 in the aerosol generating product 100 gradually increases, while the ignition point of the aerosol generating matrix 101 decreases as the dryness of the aerosol generating matrix 101 increases.

[0101] Based on this, in one example, during the sequential suction process, the rate of temperature drop of the heating component 220 is controlled during the duration of each suction action, and gradually accelerated as the number of suction ports increases, in order to prevent the aerosol-generating product 100 from being scorched or combusted.

[0102] In one example, for the same suction type, the controller 240 controls the power supply 210 to provide more power to the heating component 220 during the duration of the suction action at port M than the power provided to the heating component 220 during the duration of the suction action at port N, where M and N are both positive integers, and N is greater than M. For the same suction type, the power supply 210 provides to the heating component 220 can decrease successively as the number of suction ports increases, within the power range corresponding to that suction type.

[0103] Referring to Figures 1 and 5, in one embodiment, the aerosol generating apparatus 200 further includes a receiving tube 260 having a receiving cavity 261 and an air inlet channel 270 communicating with the outside and the receiving cavity. The receiving cavity 261 is used to receive at least a portion of the aerosol generating article 100, and at least a portion of the aerosol forming matrix 101 is located in the receiving cavity 261.

[0104] In one embodiment, to reduce power consumption, the receiving tube 260 is an insulated tube. In one example, the receiving tube 260 is made of an insulating material. The insulating material refers to a material with a thermal conductivity of less than 40 W / (m·K) at 23°C and 50% relative humidity, preferably less than 10 W / (m·K) or less than 1 W / (m·K). Insulating materials include, but are not limited to, aerogel, felt, fiberglass, or glass mat. In one example, referring to FIG5, the wall of the receiving tube 260 has a sealed gas layer 262, which can be a negative pressure layer.

[0105] As a further example, the heating component 220 is at least partially disposed in the receiving tube 260, thereby reducing the radial outward heat dissipation of the heating component 220 along the receiving tube 260.

[0106] As a further example, the proximal end of the receiving tube 260 is open to allow the aerosol generating article 100 to be inserted into the receiving cavity 261, and the air inlet passage 270 is used to guide outside air into the receiving cavity 261 from the distal end of the receiving cavity 261.

[0107] In a first aspect of this application, based on any one or more of the above embodiments and examples, the suction detector 230 includes an airflow detector configured to detect the velocity of the airflow in the intake channel 270 and generate a first electrical parameter based on the airflow velocity. Therefore, this first electrical parameter is associated with the velocity of the airflow in the airflow channel 270. Different velocity ranges within the airflow channel 270 result in different first electrical parameters. The controller 240 can identify the suction type based on the information about the airflow velocity in the airflow channel 270 carried by the first electrical parameter. For example, if the airflow velocity in the airflow channel 270 is less than a first velocity threshold, there is no suction; if the airflow velocity in the airflow channel 270 is between the first and second velocity thresholds, the current suction is light suction; if the airflow velocity in the airflow channel 270 is between the second and third velocity thresholds, the current suction is moderate suction; and if the airflow velocity in the airflow channel 270 is greater than the third velocity threshold, the current suction is heavy suction.

[0108] To protect the airflow detector, the airflow detector can be spaced apart from the heating element 220.

[0109] In a second aspect of this application, based on any one or more of the above embodiments and examples, and referring to Figures 1, 5, and 6, the suction detector 230 includes a second temperature detector 231, and the heating assembly 220 includes an airflow heater 221. The airflow heater 221 has an air hole 2213 for providing air into the receiving cavity 261. Along the airflow direction, the airflow heater 221 is disposed upstream of the receiving cavity 261 and is capable of heating the air flowing through the air hole 2213. The second temperature detector 231 is disposed adjacent to the airflow heater 221 and located upstream of at least a portion of the air hole 2213, and generates a first electrical parameter based on the temperature it detects. Here, "adjacent" includes: 1. the second temperature detector 231 is disposed in close contact with the airflow heater 221; or 2. the second temperature detector 231 is adjacent to but does not contact the airflow heater 221.

[0110] When suction is present, the air temperature change upstream of the vent 2213 is more drastic than the air temperature change inside the vent 2213, and the temperature change near the upstream of the airflow heater 221 is more drastic than the temperature change inside the airflow heater 221 and near the downstream of the airflow heater 221. Therefore, when suction is present, the temperature sensing part of the second temperature detector 231 can generate a large change in charge, current, or potential, and generate the first electrical parameter based on this. This can effectively prevent the second temperature detector 231 from missing or falsely detecting suction, and can also improve the sensitivity and accuracy of the second temperature detector 231 to the temperature changes corresponding to different suction types.

[0111] In the second aspect, the first electrical parameter is related to the temperature detected by the second temperature detector 231. The first electrical parameter differs depending on the range of temperature change within the sensing element of the second temperature detector 231 per unit time. The controller 240 can identify the suction type based on the temperature information carried by this first electrical parameter. For example, if the temperature change within a unit time is less than a first change threshold, it is determined that there is no suction action; if the temperature change within a unit time is between the first and second change thresholds, it is determined that the current suction is light suction; if the temperature change within a unit time is between the second and third change thresholds, it is determined that the current suction is moderate suction; and if the temperature change within a unit time is at the third change threshold, it is determined that the current suction is heavy suction.

[0112] Based on the second aspect, in one embodiment, the airflow heater 231 includes a porous body 2211 with vents 2213 and a heating element 2212 for heating the porous body 2211. The second temperature detector 231 is spaced apart from the heating element 2212. At the moment the suction action begins, the heating element 2212 heats up at its original power, resulting in a small temperature change that is not easily detected by the temperature detector. Therefore, the second temperature detector 231 is spaced apart from the heating element 2212 to prevent the temperature of the heating element 2212 from interfering with the second temperature detector 231's detection of the suction action, making the first electrical parameter generated by the second temperature detector 231 more consistent with the actual suction type.

[0113] For example, referring to Figures 6 and 7, the second temperature detector 231 includes a metal temperature sensing element 2313 fixed on the porous body 2211, and a first thermocouple wire 2311 and a second thermocouple wire 2312 welded to the metal temperature sensing element 2313. The first thermocouple wire 2311 and the second thermocouple wire 2312 are made of different materials. The hot end of the first thermocouple wire 2311 and the hot end of the second thermocouple wire 2312 are electrically connected to each other. The cold end of the first thermocouple wire 2311 and the cold end of the second thermocouple wire 2312 are electrically connected to the controller 240. Thus, the second temperature detector 231 is a thermocouple and can detect the temperature of the porous body 2211. In the embodiment shown in Figure 7, a portion of the porous body 2211 may have a notch 2214. A portion of the metal temperature-sensing element 2313 is disposed around the notch 2214. The hot ends of the first thermocouple wire 2311 and the second thermocouple wire 2312 are located within the notch 2214. At least one vent 2213 on the porous body 2211 communicates with the notch 2214, allowing air to flow through the hot ends of the first thermocouple wire 2311 and the second thermocouple wire 2312 during suction, enabling the second temperature detector 231 to clearly sense the temperature change caused by suction. It should be noted that the second temperature detector 231 can also be a thermistor or other temperature-detecting sensor; the second temperature detector 231 can also be connected to the porous body 2211 in other ways.

[0114] To further improve the sensitivity and accuracy of the second temperature detector 231 in sensing suction, as shown in Figure 1, the second temperature detector 231 and the porous body 2211 are spaced apart, so that the temperature sensed by the second temperature detector 231 is neither the temperature of the heating element 2212 nor the temperature of the porous body 2211. This prevents the temperature of the porous body 2211 from interfering with the second temperature detector 231's detection of suction action, making the first electrical parameter generated by the second temperature detector 231 more consistent with the actual suction type.

[0115] However, if the distance between the second temperature detector 231 and the porous body 2211 and the heating element 2212 is too large, the temperature change at the location of the second temperature detector 231 during suction will be too small, which is not conducive to detecting the suction action. Therefore, it is preferable that the interval between the second temperature detector 231 and the porous body 2211 is between 0.5 mm and 5 mm.

[0116] The second temperature detector 231 can be disposed outside the receiving tube 260 to prevent the heat insulation effect of the receiving tube 260 from affecting the sensing of temperature changes by the second temperature detector 231. The second temperature detector 231 can be located inside the receiving tube 260 but adjacent to the far end of the receiving tube 260.

[0117] Based on the second aspect, in one embodiment, the airflow heater 221 is at least partially held in the receiving tube 260, and the airflow heater 221 is able to contact the inner surface of the receiving tube 260.

[0118] Alternatively, referring to Figure 7, the heating assembly 220 may further include a retainer 222, at least partially located within the receiving tube 260, and at least partially located within the retainer 222. The retainer 222 serves to hold the airflow heater 221 within the receiving tube 260, and the airflow heater 221 is spaced from the inner surface of the receiving tube 260 by the retainer 222. The heating assembly 220 may also include a support 223 for supporting the retainer 222 to maintain the retainer 222 connected to the receiving tube 260. In the example where the second temperature detector 231 is spaced apart from the porous body 2211, the second temperature detector 231 may be fixed to the support 223.

[0119] The control method for the aerosol generating device provided in this application includes:

[0120] The suction detector 230 is controlled to detect the user's suction action. When a suction action occurs, the suction detector 230 generates at least one first electrical parameter. The first electrical parameter is related to the suction type, and different first electrical parameters are used to characterize different suction types.

[0121] The system acquires first electrical parameters and, based on pre-stored correspondences between different first electrical parameters and the power output range of power source 210, controls power source 210 to provide power to heating component 220 according to the corresponding power range for at least a portion of the duration of the current suction action. This ensures that the temperature change of heating component 220 is related to the current suction type during at least a portion of the suction action, and that the heat provided by heating component 220 to aerosol generating article 100 under the current suction action is related to the heat removed from aerosol generating article 100 due to suction.

[0122] It should be noted that the preferred embodiments of this application are given in the specification and accompanying drawings, but are not limited to the embodiments described in this specification. Furthermore, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. An aerosol generating device, characterized in that, include: power supply; A heating component, electrically connected to the power source, is used to directly or indirectly heat the aerosol-generating product to produce aerosol. A suction detector is configured to detect a user’s suction action and generate at least one first electrical parameter when a suction action occurs, with different first electrical parameters used to characterize different suction types. The controller is configured to receive the first electrical parameter and, based on a pre-stored correspondence between different first electrical parameters and the power output range of the power source, control the power source to provide power to the heating component according to the corresponding power range for at least a portion of the time period during which the current suction action continues.

2. The aerosol generating apparatus according to claim 1, characterized in that, The controller is also configured to identify the suction type based on the first electrical parameter, and when the suction type is identified as consistent in multiple suction actions, control the power supply to provide different power to the heating component during the duration of each suction action.

3. The aerosol generating apparatus according to claim 2, characterized in that, For multiple suction actions with the same suction type, the power supplied by the controller power supply to the heating component during the duration of the suction action at port M is greater than the power supplied to the heating component during the duration of the suction action at port N, where M and N are both positive integers, and N is greater than M.

4. The aerosol generating apparatus according to claim 1, characterized in that, The controller is also configured to identify the suction type based on the first electrical parameter, and when the suction type is identified as consistent in multiple suction actions, control the power supply to provide the same power to the heating component for the duration of each suction action.

5. The aerosol generating apparatus according to any one of claims 2-4, characterized in that, The controller controls the heating component to have different cooling rates under different suction types; or The controller controls the heating component to have different cooling durations under different suction types; or The controller controls the heating component to have approximately the same cooling rate under different suction types.

6. The aerosol generating apparatus according to claim 1, characterized in that, During at least a portion of the duration of the current suction action, the controller controls the amount of power supplied by the power source to the heating assembly to vary; or During at least a portion of the duration of the current suction action, the controller controls the power supply to maintain a constant amount of electricity for the heating assembly.

7. The aerosol generating apparatus according to claim 1, characterized in that, The aerosol generating device further includes a first temperature detector, which is connected to the heating component and used to detect the temperature of the heating component. The controller is connected to the first temperature detector to obtain the temperature of the heating component. or The controller is electrically connected to the heating component to obtain a second electrical parameter of the heating component related to temperature.

8. The aerosol generating apparatus according to claim 7, characterized in that, The controller is also configured to control the power supply to increase the power supplied to the heating component when the temperature of the heating component is lower than a preset lower limit value during the duration of the suction action, so as to raise the temperature of the heating component.

9. The aerosol generating apparatus according to claim 1, characterized in that, The controller is also configured to identify the end of the suction action based on the first electrical parameter, and to control the power supply to increase the power supplied to the heating component when the suction action ends, so as to heat up the heating component.

10. The aerosol generating apparatus according to claim 1 or 9, characterized in that, The controller is configured to, when the duration of the current suction action is less than a first threshold, control the power supply to reduce the power provided to the heating component for a preset duration after the suction action ends, or control the power supply to stop providing power to the heating component for a preset duration after the suction action ends; and to, when the duration of the current suction action is greater than a second threshold, control the power supply to increase the power provided to the heating component until the current suction action ends.

11. The aerosol generating apparatus according to claim 1 or 9, characterized in that, The suction types include heavy suction, light suction and general suction. The airflow velocity during heavy suction is greater than that during general suction, and the airflow velocity during light suction is less than that during general suction. The controller controls the power supply to provide the heating assembly with more power during the duration of heavy suction than it provides during the duration of normal suction; and / or The controller controls the power supply to provide less power to the heating assembly during at least a portion of the time of mild suction than it provides during at least a portion of the time of normal suction; and / or The controller controls the power supply to provide power to the heating component during the duration of heavy suction, such that the temperature drop of the heating component at the end of the heavy suction action is substantially equal to the temperature drop of the heating component at the end of the normal suction action; and / or The controller controls the power supply to provide power to the heating component during the duration of the mild suction, so that the temperature drop of the heating component at the end of the mild suction action is basically equal to the temperature drop of the heating component at the end of the normal suction action.

12. The aerosol generating apparatus according to claim 1, characterized in that, The aerosol generating apparatus further includes a receiving tube having a receiving cavity and an air inlet channel communicating with the outside and the receiving cavity, the receiving cavity being used to receive at least a portion of the aerosol generated article; the suction detector includes an airflow detector configured to detect the velocity of the airflow in the air inlet channel and generate the first electrical parameter based on the airflow velocity.

13. The aerosol generating apparatus according to claim 1, characterized in that, The aerosol generating apparatus further includes a receiving tube having a receiving cavity for receiving at least a portion of the aerosol-generated article; the heating assembly includes a gas flow heater having an air vent for providing air into the receiving cavity, the gas flow heater being disposed upstream of the receiving cavity along the air flow direction; The suction detector includes a second temperature detector disposed adjacent to the airflow heater and located upstream of at least a portion of the air vents, and generates the first electrical parameter based on the temperature it detects.

14. The aerosol generating apparatus according to claim 13, characterized in that, The receiving tube is an insulated tube, and at least a portion of the airflow heater is contained within the receiving tube.

15. The aerosol generating apparatus according to claim 13, characterized in that, The airflow heater includes a porous body with the air holes and a heating element for heating the porous body, and the second temperature detector is spaced apart from the heating element.

16. The aerosol generating apparatus according to claim 15, characterized in that, The second temperature detector is spaced apart from the porous body, and the distance between the second temperature detector and the porous body is between 0.5 mm and 5 mm.

17. A control method for an aerosol generating device, characterized in that, The aerosol generating apparatus includes a receiving cavity for accommodating at least a portion of the aerosol-generated article, and further includes a suction detector, a power supply, and a heating assembly for heating the aerosol-generated article, wherein the power supply is electrically connected to the heating assembly to provide power to the heating assembly; the method includes: The suction detector is controlled to detect the user's suction action. When a suction action occurs, the suction detector generates at least one first electrical parameter. The first electrical parameter is acquired, and based on the pre-stored correspondence between different first electrical parameters and the power output range of the power source, the power source is controlled to provide power to the heating component according to the corresponding power range for at least a portion of the time period during which the current suction action continues.

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