Aerosol generating device and control method therefor

Abstract

The present application discloses an aerosol generating device and a control method therefor. The aerosol generating device comprises: a heating element, configured to heat an aerosol-forming substrate to generate an aerosol; a cell, configured to provide power to the heating element; and a control unit, configured to control the cell to supply energy to the heating element on the basis of the real-time temperature of the heating element when the heating element is controlled to start heating, determine the total energy supplied by the cell to the heating element at the current time node when the cell is controlled to supply energy to the heating element on the basis of the real-time temperature of the heating element, and if the total energy supplied by the cell to the heating element at the current time node is not within an energy range corresponding to the current time node, in the remainder of the heating process after the current time node, control the cell to supply energy to the heating element on the basis of historical energy supply record data. The present application can effectively prevent further propagation of temperature runaway, thereby ensuring normal vaping of a user.

Description

Aerosol generating device and its control method

[0001] Cross-reference of related applications

[0002] This application claims priority to Chinese Patent Application No. 202410932602.4, filed on July 11, 2024, entitled "Aerosol Generating Device and Control Method Thereof", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of aerosol generation technology, and in particular to an aerosol generation device and its control method. Background Technology

[0004] In related technologies, there is an aerosol generating device that generates an aerosol for a user to inhale by heating rather than burning a solid aerosol to form a matrix, such as a cigarette. There is also another aerosol generating device that generates an aerosol for a user to inhale by heating a liquid aerosol to form a matrix, such as e-liquid.

[0005] In the aforementioned devices, TCR (Temperature Coefficient of Resistance) devices are typically used for temperature measurement. Knowing the initial temperature, initial resistance (reference resistance), and current resistance of the TCR device, the current temperature can be calculated using the corresponding formula for the TCR. This facilitates temperature control in the aerosol generation device.

[0006] However, as the aerosol generator is used for an extended period, the initial resistance of the TCR device will change. If the default initial resistance is still used for temperature control, it will lead to temperature runaway, thus affecting the user's suction experience.

[0007] Application content

[0008] This application provides an aerosol generating device and its control method to solve the problem of affecting the user's inhalation experience due to temperature runaway.

[0009] This application provides an aerosol generating apparatus, comprising:

[0010] Heating element for heating the aerosol forming matrix to generate aerosols;

[0011] Battery cells are used to provide power to heating elements;

[0012] The control unit is configured to control the supply of energy from the battery cell to the heating element based on the real-time temperature of the heating element when the heating element starts heating; when the battery cell supplies energy to the heating element based on the real-time temperature of the heating element, the total energy supplied by the battery cell to the heating element at the current time point is determined; if the total energy supplied by the battery cell to the heating element at the current time point is not within the energy range corresponding to the current time point, then during the remaining heating process after the current time point, the control unit controls the battery cell to supply energy to the heating element based on the historical energy supply data.

[0013] In some embodiments, the aerosol generating apparatus further includes a thermistor located at the position of the heating element, or the heating element is configured such that its resistance value can change with temperature.

[0014] In some embodiments, the aerosol generating device further includes a sampling resistor, which is electrically connected to a thermistor or a heating element to form a detection circuit;

[0015] The control unit is configured to determine the real-time temperature of the heating element based on the electrical parameter values ​​of the detection loop.

[0016] In some embodiments, the control unit is configured to control the battery cell to supply energy to the heating element based on the real-time temperature and the target temperature of the heating element, so that the real-time temperature of the heating element approaches the target temperature.

[0017] In some embodiments, the control unit is configured to, when controlling the battery cell to supply energy to the heating element, if the real-time temperature of the heating element is less than the target temperature, control the battery cell to continue supplying energy to the heating element; if the real-time temperature of the heating element is greater than or equal to the target temperature, control the battery cell to reduce or stop supplying energy to the heating element.

[0018] In some embodiments, the control unit is configured to calculate the energy supplied by the battery cell to the heating element within a preset period to obtain the periodic energy; and to accumulate multiple periodic energies to obtain the total energy supplied by the battery cell to the heating element at the current time point.

[0019] In some embodiments, the control unit is configured to acquire electrical parameter values ​​of the heating element, including the voltage and / or current of the heating element; and to determine the cycle energy based on the electrical parameter values ​​and the corresponding duty cycle.

[0020] In some embodiments, the control unit is configured to continue supplying energy to the heating element based on the real-time temperature of the heating element if the total energy supplied by the battery cell to the heating element at the current time point is within the energy range corresponding to the current time point.

[0021] In some embodiments, the control unit is configured to update the energy supply history data based on the total energy supplied to the heating element by the battery cells at all time points when the heating process of the heating element ends, if the total energy supplied to the heating element by the battery cells at all time points is within the corresponding energy range.

[0022] In some embodiments, the control unit is configured to, if the total energy supplied by the battery cell to the heating element at the current time node is not within the energy range corresponding to the current time node, set the difference between the total energy supplied by the battery cell to the heating element at the next time node and the total energy supplied by the battery cell to the heating element at the current time node in the energy supply history data as the target energy supplied by the battery cell to the heating element during the period from the current time node to the next time node.

[0023] Another aspect of this application provides a control method for an aerosol generating apparatus, the aerosol generating apparatus comprising:

[0024] Heating element for heating the aerosol forming matrix to generate aerosols;

[0025] Battery cells are used to provide power to heating elements;

[0026] The control method includes:

[0027] When the heating element starts heating, the battery cell supplies energy to the heating element based on the real-time temperature control of the heating element.

[0028] When the battery cell supplies energy to the heating element based on the real-time temperature control of the heating element, determine the total energy supplied by the battery cell to the heating element at the current time point;

[0029] If the total energy supplied by the battery cell to the heating element at the current time point is not within the energy range corresponding to the current time point, then during the remaining heating process after the current time point, the battery cell will be controlled to supply energy to the heating element based on the historical energy supply data.

[0030] The aerosol generating device and its control method provided above, when the battery cell supplies energy to the heating element based on the real-time temperature control of the heating element, if the temperature runs out of control, then during the remaining heating process, the battery cell is controlled to supply energy to the heating element based on the historical energy supply data; in this way, the further expansion of temperature runaway can be effectively prevented, ensuring normal suction for the user. Attached Figure Description

[0031] The realization of the objectives, functional features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. One or more embodiments are illustrated by way of example through the corresponding pictures in the accompanying drawings. These illustrative descriptions do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings represent similar elements. Unless otherwise stated, the figures in the drawings do not constitute a limitation on scale.

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

[0033] Figure 2 is a schematic diagram of another aerosol generating device provided in an embodiment of this application;

[0034] Figure 3 is a schematic circuit diagram of the aerosol generating device provided in the embodiment of this application;

[0035] Figure 4 is a schematic diagram of the control method of the aerosol generating device provided in the embodiment of this application. Detailed Implementation

[0036] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application. To facilitate understanding of this application, a more detailed description is provided below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "upper," "lower," "left," "right," "inner," "outer," and similar expressions used in this specification are for illustrative purposes only.

[0037] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0038] Figure 1 is a schematic diagram of an aerosol generating device provided in an embodiment of this application.

[0039] As shown in Figure 1, the aerosol generating device includes a mouthpiece 11, a liquid storage unit 12, a liquid delivery unit 13, a heating element 14, a circuit 15, a battery 16, and an interface 17. In the example of Figure 1, the above components are integrally formed, and the aerosol generating device is a typical integrated device. In another example, the aerosol generating device includes an atomizer and a power supply assembly detachably connected to the atomizer. The atomizer is usually called a cartridge, and the power supply assembly is usually called a device; wherein, the circuit 15, the battery 16, and the interface 17 are located in the power supply assembly; the mouthpiece 11, the liquid storage unit 12, the liquid delivery unit 13, and the heating element 14 are located in the atomizer.

[0040] The nozzle 11 is used for users to inhale the aerosol generated by heating.

[0041] The liquid storage unit 12 is used to store a liquid aerosol forming matrix capable of generating aerosols. The liquid aerosol forming matrix can be a liquid containing tobacco-containing substances, including volatile tobacco flavor components, or a liquid containing non-tobacco substances. For example, the liquid aerosol forming matrix may include water, solvents, ethanol, plant extracts, flavorings, fragrances, or vitamin mixtures. Flavorings may include, but are not limited to, menthol, peppermint oil, spearmint oil, and various fruit flavoring components. Fragrances may include ingredients capable of providing the user with a variety of flavors or aromas. Vitamin mixtures may be substances containing at least one of vitamins A, B, C, and E, but are not limited to. Additionally, the liquid aerosol forming matrix may include aerosol forming agents such as glycerol and propylene glycol.

[0042] The liquid transfer unit 13 is capable of transferring the liquid aerosol stored in the liquid storage unit 12 to the heating element 14 to form a matrix. For example, the liquid transfer unit 13 can be made of cotton fiber, ceramic fiber, glass fiber, or porous materials such as porous ceramics or porous glass, but is not limited thereto. The liquid transfer unit 13 can be constructed in a tubular, plate-like, or other regular or irregular shape.

[0043] The heating element 14 is a component used to heat the liquid aerosol forming matrix transferred through the liquid transfer unit 13. For example, the heating element 14 can be a metal wire, a metal plate, a ceramic heater, etc., but is not limited to these. Alternatively, the heating element 14 can be made of a conductive heating wire such as nickel-chromium wire, and can be arranged in a structure wound around the liquid transfer unit 13. The heating element 14 can be heated by an electric current supply, and heat is transferred to the liquid aerosol forming matrix in contact with the heating element 14 to heat the liquid aerosol forming matrix, thereby generating an aerosol.

[0044] In one example, the heating element 14 is configured such that its resistance changes with temperature. That is, the heating element 14 can be used both to heat the liquid aerosol forming matrix and as a thermistor for sensing real-time temperature. For example, the resistive material of the heating element 14 can be a metal or alloy material with a suitable temperature coefficient of resistance, such as a positive or negative temperature coefficient. Thus, the heating element 14 can both generate heat and function as a sensor for sensing the real-time temperature of the heating element 14.

[0045] Circuit 15 controls the overall operation of the aerosol generating device. Specifically, circuit 15 controls not only the operation of the battery cell 16 and the heating element 14, but also the operation of other components in the aerosol generating device. Furthermore, circuit 15 can determine whether the aerosol generating device is operable by checking the status of its components.

[0046] Circuit 15 includes at least one control unit. The control unit may be, but is not limited to, a combination of a microcontroller and a memory for storing executable programs in the microcontroller, the memory being integrated into the microcontroller or independent of the microcontroller.

[0047] Battery cell 16 provides power for operating the aerosol generating apparatus. For example, battery cell 16 can provide power to heat heating element 14 and can provide the power required to operate circuit 15. In addition, battery cell 16 can provide the power required to operate sensors, motors, etc. provided in the aerosol generating apparatus.

[0048] Cell 16 may be, but is not limited to, a lithium iron phosphate (LiFePO4) cell. For example, cell 16 may be a lithium cobalt oxide (LiCoO2) cell or a lithium titanate cell. Cell 16 may be a rechargeable cell.

[0049] Interface 17 is used for electrical connection with an external device, allowing the external device to charge the battery cell 16 through interface 17. For example, when an external power adapter is plugged into interface 17, interface 17 outputs a 5V charging voltage to charge the battery cell 16. In this example, interface 17 includes, but is not limited to, a Lightning interface, a Type-C interface, a Micro-USB interface, etc.

[0050] It should be noted that Figure 1 only shows the components relevant to this embodiment. Those skilled in the art will understand that the aerosol generating apparatus may also include other general components besides those shown in Figure 1.

[0051] For example, the aerosol generating device also includes a suction detector (not shown) to detect the user's suction action and generate a corresponding electrical signal, such as detecting whether the aerosol generating device is being suctioned, the suction duration, and the number of suctions, so that circuit 15, such as the control unit, controls the operation of the battery cell 16, heating element 14, etc., according to the electrical signal. For example, it controls the battery cell 16 to provide power to the heating element 14 so that the heating element 14 heats the atomized liquid aerosol to form a matrix. The suction detector can be a common pressure sensor, differential pressure sensor, airflow sensor, etc. When the aerosol generating device is being suctioned, the airflow enters through interface 17, flows through the battery cell 16, circuit 15, heating element 14, etc., and then flows out through nozzle 11. The dashed arrow in the figure roughly shows the airflow path.

[0052] Figure 2 is a schematic diagram of an aerosol generating device provided in an embodiment of this application.

[0053] As shown in Figure 2, the aerosol generating device includes:

[0054] Chamber A contains a removable aerosol-generated article B.

[0055] The aerosol-generating article B preferably uses a solid aerosol-forming matrix, which may include one or more of the following: powder, granules, fragments, strips, or sheets of vanilla leaves, tobacco leaves, homogenized tobacco, and expanded tobacco; or, the solid aerosol-forming matrix may contain additional tobacco or non-tobacco volatile flavor compounds to be released when the matrix is ​​heated.

[0056] The heating element 14 can be inserted into the aerosol generating article B when it is received in chamber A to heat it and generate aerosol. This method is commonly referred to as center heating or internal heating.

[0057] It should be noted that the heating method of the heating element 14 includes, but is not limited to, resistance heating, electromagnetic heating, infrared heating, and air heating. The shape of the heating element 14 includes, but is not limited to, needle-shaped, pin-shaped, or sheet-shaped.

[0058] It should also be noted that, unlike the example in Figure 2, in other examples, it is also possible for the heating element 14 to be configured to heat at least part of the aerosol-generating article B, i.e., circumferential heating or peripheral heating, etc.

[0059] Cell 16 is used for power supply; cell 16 can be a rechargeable cell.

[0060] Circuit 15 is used to control the aerosol generating device; for example, to control the battery cell 16 to provide power to the heating element 14.

[0061] Circuit 15 includes a control unit. The control unit is a hardware component that controls the overall operation of the aerosol generating device. The control unit can be implemented as an array of logic gates, or as a combination of a microcontroller and a memory storing a program executable in the microcontroller. Those skilled in the art will understand that the control unit can be implemented in other forms of hardware.

[0062] Interface 17 is used for electrical connection with an external device, allowing the external device to charge the battery cell 16 through interface 17. For example, when an external power adapter is plugged into interface 17, interface 17 outputs a 5V charging voltage to charge the battery cell 16. In this example, interface 17 includes, but is not limited to, a Lightning interface, a Type-C interface, a Micro-USB interface, etc.

[0063] The thermistor 18 is positioned close to the heating element 14. That is, the thermistor 18 is attached to the outer surface of the heating element 14, or the thermistor 18 is spaced slightly apart from the heating element 14. The real-time temperature of the heating element 14 can be sensed through the thermistor 18.

[0064] It is understood that the heating element 14 in the example of Figure 1 can be used to heat the aerosol forming matrix and also as a thermistor for sensing real-time temperature, and is equally applicable to the aerosol generating device shown in Figure 2. The thermistor 18 shown in Figure 2, which is independent of the heating element 14, is also applicable to the aerosol generating device shown in Figure 1.

[0065] Figure 3 shows a schematic diagram of the basic components of one embodiment of circuit 15.

[0066] As shown in Figure 3, circuit 15 includes:

[0067] The first switch Q1 is positioned between the battery cell 16 (shown as VCC in the figure) and the heating element 14 (shown as R2 in the figure). (It can be understood that if the thermistor 18 is set independently of the heating element 14, it is positioned between the battery cell 16 and the thermistor 18.) When the first switch Q1 is turned on, it is used to enable the battery cell 16 to provide power to the heating element 14.

[0068] A sampling resistor R1 is positioned between the second switch Q2 and the heating element 14. Specifically, the first end of the sampling resistor R1 is connected to the second switch Q2, and the second end of the sampling resistor R1 is connected to the heating element 14. This sampling resistor R1 is a standard resistor with a basically constant resistance, ranging from 0.1mΩ to 1000KΩ. It is used to form a series connection with the heating element 14 when the second switch Q2 is turned on, thereby forming a detection circuit that can detect the voltage between the sampling resistor R1 and the heating element 14 through voltage division. Of course, when detection is not required, the second switch Q2 can be turned off to disconnect the detection circuit.

[0069] In the specific implementation shown in Figure 3, the first terminal of the heating element 14 includes two paths; the first path is connected to the first switching transistor Q1, and the second path is used to form a series connection with the sampling resistor R1. The second terminal of the heating element 14 is grounded.

[0070] Further, in the specific implementation shown in Figure 3, the first switch Q1 and the second switch Q2 are controlled to be turned on or off by the control unit, and the first switch Q1 and the second switch Q2 are not turned on simultaneously. When power is needed to supply power to the heating element 14, the control unit controls the first switch Q1 to be turned on and the second switch Q2 to be turned off, so that the battery cell 16 supplies power to the heating element 14. When it is necessary to detect the temperature of the heating element 14, the control unit controls the first switch Q1 to be turned off and the second switch Q2 to be turned on. The temperature of the heating element 14 can be determined by detecting the electrical parameter values ​​of the detection circuit, such as voltage.

[0071] Let V1 be the voltage across the sampling resistor R1 and V2 be the voltage across the heating element 14. During the detection process, the control unit can sample the voltage at the first end of the resistor R1, i.e., sampling point a1 in the figure, and record it as Va1. This voltage is the voltage across the detection circuit. The control unit can also sample the voltage at the first end of the heating element 14, i.e., sampling point b1 in the figure, as Vb1 is the voltage across the first end of the heating element 14. Since the second end of the heating element 14 is grounded in Figure 3, the voltage at sampling point b1 is Vb1 = V2, and the voltage across the sampling resistor R1 is V1 = Va1 - V2.

[0072] Based on the aforementioned aerosol generating device, in one example, the control unit is configured to control the supply of energy from the battery to the heating element based on the real-time temperature of the heating element when the heating element starts heating; when the battery supplies energy to the heating element based on the real-time temperature of the heating element, the total energy supplied by the battery to the heating element at the current time point is determined; if the total energy supplied by the battery to the heating element at the current time point is not within the energy range corresponding to the current time point, then during the remaining heating process after the current time point, the battery is controlled to supply energy to the heating element based on historical energy supply data.

[0073] When the control unit receives a start heating command from the heating element 14, it controls the heating element 14 to start heating. For example, when the control unit receives a button signal from the button or a suction signal from the suction detector, it controls the heating element 14 to start heating.

[0074] After heating element 14 starts heating, the battery cell 16 supplies energy to heating element 14 based on the real-time temperature control of heating element 14. In one example, the current resistance value of heating element 14 (or thermistor 18) can be calculated first. For example, the current of the detection circuit can be obtained based on the voltage across sampling resistor R1 and the resistance value of sampling resistor R1. Then, the current resistance value of heating element 14 (or thermistor 18) can be calculated based on the voltage across heating element 14 (or thermistor 18) and the current of the detection circuit. Then, the corresponding real-time temperature is obtained according to the TCR calculation formula, so that the control unit controls the battery cell 16 to supply energy to heating element 14 based on the calculated real-time temperature of heating element 14.

[0075] In one example, the control unit is configured to control the battery cell to supply energy to the heating element based on the real-time temperature and the target temperature of the heating element, so that the real-time temperature of the heating element approaches the target temperature.

[0076] Specifically, when the control cell 16 supplies energy to the heating element 14, if the real-time temperature of the heating element 14 is less than the target temperature, the control cell 16 continues to supply energy to the heating element 14; if the real-time temperature of the heating element 14 is greater than or equal to the target temperature, the control cell 16 reduces or stops supplying energy to the heating element 14.

[0077] For example, in the aerosol generating device shown in Figure 2, during the preheating stage after the heating element 14 is started, the temperature of the heating element 14 needs to be raised from the initial temperature to a preset target temperature T1 (200℃~350℃), and then maintained at the preset target temperature for a period of time. When the control unit detects that the real-time temperature of the heating element 14 is less than the target temperature T1, it controls the battery cell 16 to continue supplying energy to the heating element 14; if the real-time temperature of the heating element 14 is greater than or equal to the target temperature T1, it controls the battery cell 16 to reduce the energy supplied to the heating element 14, so that the heating element 14 is maintained at the target temperature T1 for a period of time.

[0078] During the suction phase after the preheating phase, the temperature of the heating element 14 needs to be maintained at the target temperature T2 (T2 < T1). When the control unit 16 obtains that the real-time temperature of the heating element 14 is less than the target temperature T2 - Δt, it controls the battery cell 16 to supply energy to the heating element 14 to increase the temperature of the heating element 14; when it obtains that the real-time temperature of the heating element 14 is greater than or equal to the target temperature T2 + Δt, it controls the battery cell 16 to stop supplying energy to the heating element 14 to reduce the temperature of the heating element 14, so that the temperature of the heating element 14 is maintained at the target temperature T2.

[0079] When controlling the battery cell 16 to supply energy to the heating element 14 based on the real-time temperature of the heating element 14, the total energy supplied by the battery cell 16 to the heating element 14 at the current time node is determined.

[0080] In one example, the control unit is configured to calculate the energy supplied by the battery cell to the heating element within a preset period to obtain the period energy; and accumulate multiple period energies to obtain the total energy supplied by the battery cell to the heating element at the current time node.

[0081] During the operation of the aerosol generating device, the above temperature control algorithm controls the battery cell 16 to supply energy to the heating element 14 according to the temperature curve and the real-time temperature of the heating element 14, so that the temperature of the heating element 14 meets the temperature curve. Among them, the preset period t refers to the control period of the above temperature control algorithm, also known as the temperature control period, which refers to the duration when the temperature control algorithm in the control unit adjusts the power (or temperature) provided by the battery cell to the heating element 14 each time. Generally, the duration of the period t lasts for about dozens of milliseconds.

[0082] For example, within one period t, the duty cycle of the power (or voltage, current) provided by the battery cell 16 to the heating element 14 is the same. In the time dimension, the duty cycles of multiple periods t are not exactly the same, which can be determined based on the temperature difference. Here, the temperature difference refers to the difference between the temperature of the heating element 14 collected and the corresponding target temperature in the temperature curve. Those skilled in the art can understand that the method of determining the duty cycle is also known in the prior art and will not be introduced in detail here.

[0083] The energy supplied by the battery cell 16 to the heating element 14 within the period t is also called the period energy. By summing up all the period energies from the start heating moment to the current time node and accumulating multiple period energies, the total energy value at the current time node can be obtained. For example:

[0084] Within the period t, the period energy Et = U * I * D * t, where U is the voltage, I is the current, D is the duty cycle, and t is the control period. The energies of all periods t from the start heating moment to the current time node (such as 5 s) are accumulated to obtain the total energy at the current time node.

[0085] In order to control the temperature of the heating element 14, the duty cycle D is the same within the same period t, but the duty cycle is not exactly the same in different periods t. By accumulating the total energy over the periods, the energy supplied by the battery cell 16 to the heating element 14 can be calculated more accurately, and the energy borne by the heating element 14 can be controlled more effectively.

[0086] The time nodes are preset and can be empirical or experimental values. For example, for a heating cycle lasting 300 seconds, the time nodes can be set as follows: {10s, 15s, 25s...200s, 210s..., 300}. Correspondingly, to better control the temperature of the heating element 14, each time node has a corresponding energy range. The upper limit of the energy range is represented by energy_output_max[x], and the lower limit is represented by energy_output_min[x], where x represents the time node. During the normal operation of the aerosol generating device, the total energy supplied by the battery cell 16 to the heating element 14 at each time node must be within the corresponding energy range.

[0087] In one example, the energy range corresponding to each time point can be determined in the following way:

[0088] After adjusting the taste of the device, the heating was first turned on in a high-temperature environment, and the total energy output energy_sum at the corresponding time node record_time[x] was recorded to generate an energy record table energy_record_hot[x]. In order to take into account the differences between different aerosol generating devices, each item in energy_record_hot[x] was reduced by 10% to obtain energy_output_min[x].

[0089] record_time[x] can be set as follows: {10s, 15s, 25s……200s, 210s……, 300}.

[0090] Then, heating is turned on in a lower temperature environment, and the total energy output energy_sum at the corresponding time node record_time[x] is recorded to generate an energy record table energy_record_cold[x]. In order to take into account the differences between different aerosol generating devices, each item of energy_record_cold[x] is increased by 10% to obtain energy_output_max[x].

[0091] Finally, energy_output_min[x] and energy_output_max[x] can be fine-tuned based on the actual pumping conditions.

[0092] In one example, the control unit is configured to acquire electrical parameter values ​​of the heating element, including the voltage and / or current of the heating element; and determine the cycle energy based on the electrical parameter values ​​and the corresponding duty cycle.

[0093] For example, as shown in Figure 3, the control unit collects the voltage and current of the heating element 14 within each cycle t. Then, based on the voltage, current, and corresponding duty cycle of the heating element 14, the cycle energy is determined. Specifically, the cycle energy can be calculated using the aforementioned energy formula Et=U*I*D*t.

[0094] If the total energy supplied by the battery cell 16 to the heating element 14 at the current time point is not within the energy range corresponding to the current time point, then during the remaining heating process after the current time point, the battery cell will be controlled to supply energy to the heating element based on the historical energy supply data.

[0095] Following the example above, assuming the current time node is 200s, the total energy supplied by the battery cell 16 to the heating element 14 at the current time node 200s is energy_output

[0200] . If energy_output

[0200] is not within the corresponding energy range, that is, less than energy_output_min

[0200] or greater than energy_output_max

[0200] , then during the remaining heating process after the current time node 200s, that is, during the period from 200s to 300s, the battery cell 16 is controlled to supply energy to the heating element 14 based on the energy supply history record data.

[0096] Historical energy supply data is pre-stored in the aerosol generating device, for example, in the memory of the control unit. Generally, the aerosol generating device is pre-configured with historical energy supply data before leaving the factory, denoted here as energy_log[x], where x represents the time node.

[0097] Following the example above, since the total energy energy_output

[0200] supplied by cell 16 to heating element 14 at time node 200s is not within the corresponding energy range, during the period from 200s to 300s, it is necessary to control the energy supply from cell 16 to heating element 14 based on the historical energy supply data energy_log[x] (200 < x ≤ 300). Assuming energy_log

[0201] is 120J, then at time node 201s, it is necessary to control the total energy supplied by cell 16 to heating element 14 to be 120J.

[0098] In this way, the further expansion of temperature runaway can be effectively prevented, such as the temperature runaway caused by the change in the initial resistance of the heating element 14 (or the thermistor 18), ensuring normal suction for the user and improving the user experience.

[0099] In one example, the control unit is configured to, if the total energy supplied by the battery cell to the heating element at the current time node is not within the energy range corresponding to the current time node, set the difference between the total energy supplied by the battery cell to the heating element at the next time node and the total energy supplied by the battery cell to the heating element at the current time node in the energy supply history data as the target energy supplied by the battery cell to the heating element during the period from the current time node to the next time node.

[0100] Following the example above, assuming energy_output

[0200] is 80J, the corresponding energy range is [100, 110], that is, energy_output_min

[0200] is 100 and energy_output_max

[0200] is 110. Since energy_output

[0200] is less than energy_output_min

[0200] , that is, the total energy energy_output

[0200] supplied by the battery cell 16 to the heating element 14 at time node 200s is not within the corresponding energy range, during the period from 200s to 300s, it is necessary to control the battery cell 16 to supply energy to the heating element 14 based on the energy supply history data energy_log[x] (200 < x ≤ 300). Assuming energy_log

[0201] is 120J, the difference between energy_log

[0201] and energy_output

[0200] is 40J. This 40J is the target energy supplied by the battery cell 16 to the heating element 14 during the period from time node 200s to time node 201s.

[0101] In one example, the control unit is configured to continue supplying energy to the heating element based on the real-time temperature of the heating element if the total energy supplied by the battery cell to the heating element at the current time point is within the energy range corresponding to the current time point.

[0102] Understandably, if the current time point is not the end of heating, then at the next time point, it is still necessary to determine the total energy supplied by the battery cell 16 to the heating element 14, and to determine whether the total energy supplied by the battery cell 16 to the heating element 14 is within the energy range corresponding to the next time point, until the heating process of the heating element 14 ends. The judgment and processing methods can be referred to the aforementioned section.

[0103] In one example, the control unit is configured to update the energy supply history data based on the total energy supplied to the heating element by the battery cells at all time points when the heating process of the heating element ends, if the total energy supplied to the heating element by the battery cells at all time points is within the corresponding energy range.

[0104] Following the example above, if the total energy supplied to the heating element 14 at each time point {10s, 15s, 25s……200s, 210s……, 300} is within the corresponding energy range, then at the end of the heating process of the heating element 14, the data energy_log_bk[x] of the total energy supplied to the heating element 14 by the battery cell 16 at each recorded time point is replaced with energy_log[x].

[0105] The following describes the control method provided by some embodiments of this application, using exemplary applications and implementations of the aerosol generating apparatus provided in the embodiments of this application. Please refer to Figure 4, which is a schematic flowchart of the control method provided by some embodiments of this application. It can be understood that the executing entity of this control method can be one or more control units of a circuit, such as a microcontroller unit.

[0106] As shown in Figure 4, method S10 may specifically include the following steps:

[0107] S11. When the heating element starts heating, the battery cell supplies energy to the heating element based on the real-time temperature control of the heating element.

[0108] S12. When the battery cell supplies energy to the heating element based on the real-time temperature control of the heating element, determine the total energy supplied by the battery cell to the heating element at the current time point.

[0109] S13. If the total energy supplied by the battery cell to the heating element at the current time point is not within the energy range corresponding to the current time point, then during the remaining heating process after the current time point, the battery cell will be controlled to supply energy to the heating element based on the historical energy supply data.

[0110] In one example, the control unit is configured to control the battery cell to supply energy to the heating element based on the real-time temperature and the target temperature of the heating element, so that the real-time temperature of the heating element approaches the target temperature.

[0111] In one example, the control unit is configured to, when controlling the battery cell to supply energy to the heating element, if the real-time temperature of the heating element is less than the target temperature, control the battery cell to continue supplying energy to the heating element; if the real-time temperature of the heating element is greater than or equal to the target temperature, control the battery cell to reduce or stop supplying energy to the heating element.

[0112] In one example, the control unit is configured to calculate the energy supplied by the battery cell to the heating element within a preset period to obtain the periodic energy; and to accumulate multiple periodic energies to obtain the total energy supplied by the battery cell to the heating element at the current time point.

[0113] In one example, the control unit is configured to acquire electrical parameter values ​​of the heating element, including the voltage and / or current of the heating element; and determine the cycle energy based on the electrical parameter values ​​and the corresponding duty cycle.

[0114] In one example, the control unit is configured to continue supplying energy to the heating element based on the real-time temperature of the heating element if the total energy supplied by the battery cell to the heating element at the current time point is within the energy range corresponding to the current time point.

[0115] In one example, the control unit is configured to update the energy supply history data based on the total energy supplied to the heating element by the battery cells at all time points when the heating process of the heating element ends, if the total energy supplied to the heating element by the battery cells at all time points is within the corresponding energy range.

[0116] In one example, the control unit is configured to, if the total energy supplied by the battery cell to the heating element at the current time node is not within the energy range corresponding to the current time node, set the difference between the total energy supplied by the battery cell to the heating element at the next time node and the total energy supplied by the battery cell to the heating element at the current time node in the energy supply history data as the target energy supplied by the battery cell to the heating element during the period from the current time node to the next time node.

[0117] It should be noted that while preferred embodiments of this application are provided in the specification and accompanying drawings, this application can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are not intended to impose additional limitations on the content of this application; their purpose is to provide a more thorough and comprehensive understanding of the disclosure of this application. Furthermore, the above-described technical features can be combined with each other to form various embodiments not listed above, all of which are considered to be within the scope of this application's specification. Moreover, 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: Heating element for heating the aerosol forming matrix to generate aerosols; Battery cells are used to provide power to the heating element; The control unit is configured to, when controlling the heating element to start heating, control the battery cell to supply energy to the heating element based on the real-time temperature of the heating element; when controlling the battery cell to supply energy to the heating element based on the real-time temperature of the heating element, determine the total energy supplied by the battery cell to the heating element at the current time point; if the total energy supplied by the battery cell to the heating element at the current time point is not within the energy range corresponding to the current time point, then during the remaining heating process after the current time point, control the battery cell to supply energy to the heating element based on historical energy supply data.

2. The aerosol generating apparatus as described in claim 1, characterized in that, The aerosol generating device further includes a thermistor located at the position of the heating element, or the heating element is configured such that its resistance value can change with temperature.

3. The aerosol generating apparatus as described in claim 2, characterized in that, It also includes a sampling resistor, which is electrically connected to the thermistor or the heating element to form a detection circuit; The control unit is configured to determine the real-time temperature of the heating element based on the electrical parameter values ​​of the detection circuit.

4. The aerosol generating apparatus according to claim 1, characterized in that, The control unit is configured to control the battery cell to supply energy to the heating element based on the real-time temperature and the target temperature of the heating element, so that the real-time temperature of the heating element approaches the target temperature.

5. The aerosol generating apparatus according to claim 4, characterized in that, The control unit is configured to, when controlling the battery cell to supply energy to the heating element, if the real-time temperature of the heating element is less than the target temperature, control the battery cell to continue supplying energy to the heating element; if the real-time temperature of the heating element is greater than or equal to the target temperature, control the battery cell to reduce or stop supplying energy to the heating element.

6. The aerosol generating apparatus according to claim 1, characterized in that, The control unit is configured to calculate the energy supplied by the battery cell to the heating element within a preset period to obtain the periodic energy; and to accumulate multiple periodic energies to obtain the total energy supplied by the battery cell to the heating element at the current time point.

7. The aerosol generating apparatus according to claim 6, characterized in that, The control unit is configured to acquire electrical parameter values ​​of the heating element, including the voltage and / or current of the heating element; and to determine the cycle energy based on the electrical parameter values ​​and the corresponding duty cycle.

8. The aerosol generating apparatus according to claim 1, characterized in that, The control unit is configured to continue controlling the battery cell to supply energy to the heating element based on the real-time temperature of the heating element if the total energy supplied by the battery cell to the heating element at the current time point is within the energy range corresponding to the current time point.

9. The aerosol generating apparatus according to claim 8, characterized in that, The control unit is configured to update the energy supply history data based on the total energy supplied by the battery cells to the heating element at all time points when the heating process of the heating element ends, provided that the total energy supplied by the battery cells to the heating element at all time points is within the corresponding energy range.

10. The aerosol generating apparatus according to claim 1, characterized in that, The control unit is configured to, if the total energy supplied by the battery cell to the heating element at the current time node is not within the energy range corresponding to the current time node, set the difference between the total energy supplied by the battery cell to the heating element at the next time node and the total energy supplied by the battery cell to the heating element at the current time node in the energy supply history data as the target energy supplied by the battery cell to the heating element during the period from the current time node to the next time node.

11. A control method for an aerosol generating device, characterized in that, The aerosol generating device includes: Heating element for heating the aerosol forming matrix to generate aerosols; Battery cells are used to provide power to the heating element; The control method includes: When the heating element is activated, the battery cell supplies energy to the heating element based on the real-time temperature of the heating element. When the battery cell supplies energy to the heating element based on the real-time temperature control of the heating element, the total energy supplied by the battery cell to the heating element at the current time point is determined; If the total energy supplied by the battery cell to the heating element at the current time point is not within the energy range corresponding to the current time point, then during the remaining heating process after the current time point, the battery cell will be controlled to supply energy to the heating element based on the historical energy supply data.

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