Preheating control method of heating smoking set, heating smoking set and storage medium

Abstract

The invention relates to the field of heating smoking sets, in particular to a preheating control method of a heating smoking set, the heating smoking set and a storage medium, and the preheating control method comprises the steps that 1, a controller starts a heater and controls the heater to enter a preheating stage; 2, the controller obtains the first preheating temperature of the heater at a first time point after the controller enters the preheating stage; 3, the controller adjusts heating working parameters according to the first preheating temperature so that the heater can reach the target preheating temperature at the second time point of the preheating stage; and 4, when the heater reaches the target preheating temperature at the second time point of the preheating stage, the controller controls the heater to maintain the target preheating temperature until the third time point of the preheating stage, and the preheating stage is finished. The preheating temperature at the first time point is monitored in the preheating stage, so that the subsequent preheating rate is adjusted, the overall preheating temperature of the heating smoking set is optimized, and the smoking taste is improved.

Description

Technical Field

[0001] The present application relates to the field of heated smoking articles, and in particular to a preheating control method of a heated smoking article, a heated smoking article, and a storage medium. Background Art

[0002] As people pay more and more attention to health, they realize that traditional cigarettes are harmful to health. Therefore, products called "heat-not-burn cigarettes" have been produced. Compared with traditional cigarettes, heat-not-burn cigarettes need to be heated with heating devices. While meeting the physiological needs of users, heat-not-burn cigarettes reduce harmful substances such as tar and carbon monoxide brought by traditional cigarettes. Heat-not-burn cigarettes heat the tobacco in the aerosol generating matrix to release aerosols, so that users can get a smoking experience. The tobacco is not burned, so no complex chemical reactions occur, allowing users to get experience while reducing the inhalation of harmful substances.

[0003] The core function of a heated smoking device is to heat the tobacco material of a cigarette to a suitable temperature through a heating element to release aroma and smoke while avoiding the production of harmful substances. However, the heating elements in the current heated smoking devices are mostly made of materials with a certain resistance value. When current passes through, due to the existence of resistance, electrical energy will be converted into thermal energy, thereby producing a heating effect. The resistance value, TCR (Temperature Coefficient of Resistance) of the heating elements in each heated smoking device is different, resulting in significant defects in the preheating method of the existing heated smoking devices. That is, due to individual differences in the heating elements, the heating rate of each heated smoking device in the preheating stage is affected, and the heating rate is not consistent. The total preheating time of each heated smoking device is usually fixed, resulting in the total heat output of the heated smoking devices of the same model and batch in the preheating stage is often too large or too small, resulting in insufficient smoke volume or insufficient release of flavor substances, or excessive heating due to excessive release in the early stage, resulting in large differences in taste in the later stage, and other problems. At present, some manufacturers test the TCR of heating elements one by one and modify the heating program to be burned, which seriously affects the production efficiency of products. Therefore, it is urgent to find a method that can effectively solve the problem that the preheating state of each heating device cannot be kept relatively stable and consistent, resulting in inconsistent smoking taste of each device. Summary of the invention

[0004] In view of this, the purpose of this application is to provide a heating control method for a heated smoking device to solve the above problems.

[0005] In order to solve the above technical problems, this application adopts the following technical solutions:

[0006] In a first aspect, the present application provides a preheating control method for a heated smoking device, the heated smoking device comprising: a heating chamber, a power supply, a heater and a controller, the heater being used to heat an aerosol-forming matrix contained in the heating chamber during operation to generate an aerosol, the controller controlling the power supply to provide electrical energy to the heater according to heating operating parameters, the preheating control method comprising or consisting of the following steps: Step 1: the controller starts the heater and controls the heater to enter a preheating stage; Step 2: the controller obtains a first preheating temperature of the heater at a first time point after entering the preheating stage; Step 3: the controller adjusts the heating operating parameters according to the first preheating temperature, and the number of adjustments is limited to one, two, multiple times and / or no more than three times, so that the heater reaches a target preheating temperature at a second time point in the preheating stage; Step 4: when the heater reaches the target preheating temperature at the second time point in the preheating stage, the controller controls the heater to maintain the target preheating temperature until a third time point in the preheating stage, and the preheating stage is completed.

[0007] Furthermore, the heating operating parameters are parameters related to any one or more of the following combinations: current flowing through at least a portion of the heater, voltage across at least a portion of the heater, a boost module acting on the heater, and resistance across at least a portion of the heater.

[0008] Further, adjusting the resistance of at least a portion of the heater includes: increasing / decreasing the series resistance of the heater, switching the series resistance of the heater to a larger / smaller one.

[0009] Furthermore, step 3 specifically includes: the controller determines whether the first preheating temperature exceeds a preset temperature threshold: if so, the controller adjusts the heating working parameters to control the reduction or increase of the preheating temperature rate of the heater.

[0010] Furthermore, the adjusted preheating temperature rate is: Among them, v T is the adjusted preheating temperature rate, T2 is the target preheating temperature, T1 is the first preheating temperature, t2 is the second time point, and t1 is the first time point.

[0011] Furthermore, (t3-t0) is 5-8, 8-12, 12-18, 18-24, 24-32 or 32-40 seconds, wherein t3 is the third time point and t0 is the start time point of the preheating phase.

[0012] Furthermore, Among them, t3 is the third time point, t2 is the second time point, and t0 is the start time point of the preheating phase.

[0013] In a second aspect, the present application provides a heated smoking device, comprising a memory and a processor, wherein the memory stores computer-readable instructions, and when the computer-readable instructions are executed by the processor, the processor executes the preheating control method of the first aspect described above.

[0014] In a third aspect, the present application provides a non-volatile readable storage medium storing computer-readable instructions. When the computer-readable instructions are executed by a processor, the processor executes the preheating control method provided in the first aspect above.

[0015] Wherein, the aerosol-generating article is a smoking article, comprising an aerosol-forming substrate, which generates an aerosol that can be directly inhaled into the lungs of the user through the user's mouth by heating. Preferably, the aerosol-forming substrate is a solid aerosol-forming substrate. The aerosol-forming substrate may include both solid and liquid components. Preferably, the aerosol-forming substrate includes nicotine. In some preferred embodiments, the aerosol-forming substrate includes tobacco.

[0016] Understandably, tobacco itself has a unique flavor and aroma, which is a key feature sought after by many aerosol-generating products. By extracting the active ingredients in tobacco and using them as part of the aerosol-generating matrix, the smoking experience of traditional tobacco products can be simulated. Nicotine is the main alkaloid in tobacco and is also sought after by many smokers. Adding tobacco extracts to the aerosol-generating matrix can ensure that the product contains the right amount of nicotine to meet the needs of users.

[0017] Aerosol generating device is used to describe a device that interacts with an aerosol-forming substrate of an aerosol generating article to generate an aerosol. Preferably, the aerosol generating device is a heated smoking article that interacts with an aerosol-generating substrate of an aerosol generating article to generate an aerosol that is directly inhalable into the lungs of a user through the user's mouth. The aerosol generating device may be a holder for a smoking article.

[0018] The power source can be any suitable power source, such as a DC voltage source, such as a battery. In one embodiment, the power source is a lithium-ion battery. Alternatively, the power source can be a nickel metal hydride battery, a nickel cadmium battery, or a lithium-based battery, such as lithium cobalt, lithium iron phosphate, lithium titanate, or a lithium polymer battery.

[0019] The control element may be a simple switch. Alternatively, the control element may be an electrical circuit and may include one or more microprocessors or microcontrollers.

[0020] The aerosol generating system may include an aerosol generating device and one or more aerosol generating products, wherein the aerosol generating device is equipped with a corresponding number of heating chambers to accommodate the aerosol generating products.

[0021] The heater can be an internal heater inserted into the aerosol generating product, an external heater located on the periphery of the aerosol generating product, or a heater combining the internal and external heaters; but it is not limited to these, as long as it can be used to heat the aerosol generating product to produce an aerosol that can be inhaled.

[0022] It can be seen from the above technical solutions that the advantages and positive effects of the heating control method and the heating smoking device proposed in this application are:

[0023] The present application detects a first preheating temperature of the heater at a first time point through a controller during the preheating stage, determines whether the preheating rate of the heater meets expectations, and flexibly adjusts the heating operating parameters according to the first preheating temperature to increase or decrease the preheating rate of the heater, thereby ensuring that the heater reaches the target preheating temperature at a second time point, and achieving a relatively stable state of heat output by each heated smoking device during the preheating temperature rising stage, thereby directly optimizing the preheating effect from the heating program, improving the problem of inconsistent smoking taste of each heated smoking device, and greatly improving product production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above content of the present application and the following specific implementation methods will be better understood when read in conjunction with the accompanying drawings. It should be noted that the accompanying drawings are only examples of the technical solutions claimed for protection.

[0025] Figure 1 It is a relationship diagram between preheating temperature and time presented by different heating elements provided in this application;

[0026] Figure 2 It is a comparison chart of the time taken for different heating elements to reach the target preheating temperature provided by the present application;

[0027] Figure 3 is a flow chart of the preheating control method of the heated smoking article provided in the present application;

[0028] Figure 4 is an example diagram of the rate at which the heater provided by the present application reduces the preheating temperature at a first time point;

[0029] Figure 5 is an example diagram of the heater provided in the present application increasing the preheating temperature rate at a first time point;

[0030] Figure 6 It is a structural diagram of the heating smoking device provided in this application.

[0031] The reference numerals are described as follows:

[0032] an aerosol generating article 100;

[0033] an aerosol-forming substrate 101;

[0034] Support element 102;

[0035] Aerosol cooling element 103;

[0036] Cigarette holder 104;

[0037] Heating smoking device 200;

[0038] Power supply 201;

[0039] Heater 202

[0040] The chamber 203 is heated. DETAILED DESCRIPTION

[0041] The detailed features and advantages of the present application are described in detail in the specific implementation manner below, and the content is sufficient to enable any technical personnel in this field to understand the technical content of the present application and implement it accordingly. According to the description, claims and drawings disclosed in this specification, the technical personnel in this field can easily understand the relevant purposes and advantages of the present application.

[0042] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0043] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product is usually placed when in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0044] Please refer to Figure 1 In a heated smoking device, usually, after the heating is started, the heating body will increase the temperature according to the set preheating temperature. After reaching the set preheating temperature, it will heat constantly for a period of time, and then prompt that you can start smoking.

[0045] The time indicating the completion of heating, that is, the total preheating time in the sense of use, is t0, which can be perceived by the user and is usually a constant value.

[0046] It takes a certain amount of time for the heating element to reach the set temperature after starting heating, which is the preheating time t. Since the heating element is made of a material with a certain resistance value, the resistance of the resistive heating element is usually calibrated as the normal temperature resistance. When the temperature of the heating element changes, its resistance will change. The key parameters that affect the change, such as TCR, also vary from individual to individual, and the constraints in manufacturing process and materials make it impossible to completely eliminate this difference. Therefore, during the heating process, the temperature characterization curves presented by different heating elements under the same temperature control strategy show different slopes (T01, T02, T03).

[0047] Due to this difference, different heating elements take different times to reach the set temperature. When the total preheating time t0 is a constant, the preheating temperature rise time t varies, thus affecting the value of the preheating insulation time ta, as shown in Table 1.

[0048] Table 1: Changes in the relationship between different resistance values ​​and heat output under the same material

[0049] Resistance Heating rate t time Time Heat output Small quick short long More Too big slow long short Less

[0050] The specific impact is the difference in the speed of heat output. Within a certain period of time, this difference is reflected in the difference in heat transmitted to the cigarette and the difference in the heating state of the cigarette, resulting in insufficient smoke volume or insufficient release of flavor substances due to insufficient heating of the cigarette during the preheating stage, or excessive heating due to excessive heating, excessive release in the early stage, resulting in large differences in the later stage. Therefore, if the heating is insufficient, the smoke volume and flavor substances in the first two puffs will be relatively small. If the heating is excessive, the smoke in the first two puffs may be too hot, which may easily lead to insufficient smoke in the later stage.

[0051] Please refer to Figure 2 After each heating device enters the preheating stage, the corresponding heating element takes different preheating time t to reach the preheating temperature according to different heating speeds. Figure 2 The preheating time t2 and preheating insulation time ta in the figure are the standard distribution of the total preheating time t0. Case 1: The preheating time is t1. If the preheating time is short, the corresponding preheating insulation time ta is long. When the total preheating time remains unchanged, the heat output of the heating element in the preheating stage will be too high. Case 2: The preheating time is t3. If the preheating time is long, the corresponding preheating insulation time ta is short. When the total preheating time remains unchanged, the heat output of the heating element will be too low.

[0052] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0053] In an implementable manner of the present application, the heating smoking device may include: a heating chamber, a power supply, a heater and a controller, the heater includes a heating element, the heating element is used to heat an aerosol-forming substrate contained in the heating chamber during operation to generate an aerosol, and the controller controls the power supply to provide electrical energy to the heater according to heating operating parameters.

[0054] Please refer to Figure 3 The present application provides a preheating control method for a heated smoking device, and the preheating control method may include the following steps:

[0055] Step 1: The controller starts the heater and controls the heater to enter the preheating stage.

[0056] Step 2: The controller obtains a first preheating temperature of the heater at a first time point after entering the preheating stage.

[0057] Step 3: The controller adjusts the heating operating parameters according to the first preheating temperature so that the heater reaches the target preheating temperature at a second time point in the preheating phase.

[0058] Step 4: When the heater reaches the target preheating temperature at the second time point of the preheating stage, the controller controls the heater to maintain the target preheating temperature until the third time point of the preheating stage, and the preheating stage is completed.

[0059] It can be understood that the present application focuses on the inherent differences between heating elements. After the heater enters the preheating time stage and is in a preheating temperature rising state, the preheating temperature of the heater is judged, and the subsequent preheating temperature rate is adjusted to solve the problem of inconsistent preheating effects caused by differences in resistance-related physical properties in various types of heating devices, and to improve the differences in heating efficiency, temperature control, etc. that may exist between different heating devices.

[0060] Specifically, step 3 may include: the controller determines whether the first preheating temperature exceeds a preset temperature threshold, and if the first preheating temperature exceeds the preset temperature threshold, the controller adjusts the heating operating parameters to control the preheating temperature rate of the heater to be reduced. If the first preheating temperature is lower than the preset temperature threshold, the controller adjusts the heating operating parameters to control the preheating temperature rate of the heater to be increased.

[0061] For example, the heating smoking device can adjust the power of the electric energy transmitted by the power supply to the heater through a PWM (Pulse Width Modulation) waveform, thereby adjusting the preheating temperature rate.

[0062] Exemplarily, the first time point and the second time point are pre-set, the first time point is 3 seconds after the heater enters the preheating stage, and the second time point is 5 seconds after the heater enters the preheating stage. The controller detects the preheating temperature of the heater at the first time point, and compares it with the temperature at the time point of the set curve. If it is found that it exceeds the set value ±5°C at least once, the controller adjusts the heating working parameters once, twice, multiple times and / or no more than three times to control the reduction of the preheating temperature rate of the heater.

[0063] The adjusted preheating temperature rate is:

[0064]

[0065] Among them, v T is the adjusted preheating temperature rate, T2 is the target preheating temperature, T1 is the first preheating temperature, t2 is the second time point, and t1 is the first time point.

[0066] Further, the heating operating parameters are parameters related to any one or more of the following combinations: current flowing through at least a part of the heater, voltage of at least a part of the heater, a boost module acting on the heater, and resistance of at least a part of the heater.

[0067] Adjusting the resistance of at least a portion of the heater may include increasing / decreasing a series resistance of the heater, switching a larger / smaller series resistance of the heater.

[0068] In the implementation method of the present application, if the controller detects that the first preheating temperature of the heater is lower than the set temperature, it can be determined that the current preheating temperature rise speed of the heater is too slow, and a higher preheating temperature is required to guide the heating, thereby increasing the preheating temperature speed of the heater so that it can achieve the standard preheating insulation time ta. The heating operating parameters can be adjusted by increasing the current, voltage, using a boost module, reducing the series resistance, switching to a smaller series resistance, etc. to increase the power received by the heater.

[0069] If the controller detects that the first preheating temperature of the heater is higher than the set temperature, it can be determined that the current preheating temperature rise rate of the heater is too fast, and a lower temperature is needed to slow down the heating rate so that it can achieve the standard preheating insulation time ta. The power received by the heater can be reduced by reducing the current, voltage, increasing the series resistance, switching to a larger series resistance, etc.

[0070] The preheating stage of the heater includes a heating stage and a heat preservation stage. The first time point is in the heating stage, the second time point is the time when the heating stage ends, and the second time point to the third time point are the heat preservation stage of the heater. During the preheating stage of the entire heating smoking device, the controller detects the temperature of the heating element in real time. Usually the total preheating time t0 is 5-40 seconds, that is, the third time point of the preheating stage is any time of 5-8, 8-12, 12-18, 18-24, 24-32 or 32-40 seconds from the 0th second of the preheating stage. Among them, the preheating and heat preservation time ta from the second time point to the third time point usually needs to be no less than 30% of the total preheating time t0, that is, the proportion of the preheating and heat preservation time is at least 30% of the total preheating time.

[0071] In an implementable manner of the present application, the total preheating time is fixed, and the heat output and duration of the heating device in the heat preservation stage are also fixed. Therefore, it is necessary to introduce temperature detection at the first time point to adjust the heating rate of the subsequent heating device in the heating stage to achieve a balance in heat output between the heating stage and the heat preservation stage.

[0072] Please refer to Figure 4 , the heating curve of Tx2 in the figure is a standard heating curve, and the total heat output of the heating device corresponding to the standard heating curve is used as the standard. In the embodiment of the present application, the controller detects the corresponding preheating temperature at the first time point t1 of the heating curve of Tx1. When it is determined that the current preheating temperature exceeds the preset temperature threshold, the controller controls the reduction of the preheating temperature rate of the heater by reducing the current, voltage, increasing the series resistance, switching to a larger series resistance, etc., so as to ensure that the target preheating temperature is reached at the second time point.

[0073] Please refer to Figure 5 In an embodiment of the present application, the controller detects the corresponding preheating temperature at the first time point t1 of the Tx3 heating curve. When it is determined that the current preheating temperature is lower than the preset temperature threshold, the controller controls the preheating temperature rate of the heater by increasing the current and voltage, using a boost module, reducing the series resistance, switching to a smaller series resistance, etc., to ensure that the target preheating temperature is reached at the second time point.

[0074] Specifically, 1. When the heating is started, the temperature of the heating element begins to rise, and a preheating temperature of 300° C. is set. The temperature of the heating element rises to the preheating temperature of 300° C. after a preheating time of 6 seconds.

[0075] 2. After reaching the preheating temperature of 300°C, maintain the preheating time for 4 seconds to complete the preheating of the cigarette.

[0076] 3. Preheating and heat preservation time 4s = total preheating time 10s - preheating and temperature rise time 6s.

[0077] 4. The resistance of the heating element will affect the heating speed, and the resistance of the heating element varies from person to person. Therefore, in batches of equipment, the preheating and heat preservation time will be different from the preset 4s. The heating element with a larger resistance will heat up more slowly, resulting in a preheating and heat preservation time shorter than the set 4s; the heating element with a smaller resistance will heat up more quickly, and the preheating and heat preservation time will be longer than the set 4s. A shorter preheating and heat preservation time will easily lead to insufficient heating, while a longer preheating and heat preservation time will easily lead to overheating.

[0078] 5. In order to improve the consistency of the heating performance of different heating elements in various heating devices, a consistent preheating time (preset 4s) is determined while the total preheating time remains unchanged at 10s. This can enable different heating devices to perform at a similar level in terms of the preheating and heat preservation time (preset 6s), thereby making the energy output in the preheating stage tend to be the same and avoiding heating differences.

[0079] 6. Design a guide temperature within the preheating time of 6s. When the temperature rises too fast, use a low guide temperature (e.g. 280℃) to reduce the temperature rise rate; when the temperature rises too slowly, use a high guide temperature (e.g. 350℃) to increase the temperature rise rate. At the end of the preheating time of 6s, a uniform preheating constant temperature (300℃) is reached, so that the preheating time of 6s and the preheating insulation time of 4s are relatively stable on different devices, thereby obtaining a stable and consistent heating state.

[0080] Please refer to Figure 6 , the aerosol generating article 100 may include a sol-forming substrate 101, a supporting element 102, an aerosol cooling element 103 and a mouthpiece 104. Based on the above inventive concept, the present application further provides a heating smoking device 200, the heating smoking device 200 comprising: a heating chamber 203, a power source 201, a heater 202 and a controller (not shown in the figure), the heater 202 is used to heat the aerosol-forming substrate 101 contained in the heating chamber 203 during operation to generate an aerosol, the power source 201 supplies power to the heater 202 and the controller, and the controller monitors the heating working parameters of the heater 202; the controller is configured to: start the heater 202 and control the heater 202 to enter the preheating stage; obtain a first preheating temperature of the heater 202, the first preheating temperature being the temperature corresponding to the first time point of the heater 202 in the preheating stage; and adjust the heating working parameters according to the first preheating temperature so that the heater 202 reaches the target preheating temperature at the second time point of the preheating stage.

[0081] It can be understood that the specific process of implementing the heating control method by heating the smoking device can be found in the above method part, which will not be repeated here.

[0082] In one embodiment, the controller may include a memory and at least one processor, which may be configured to perform applicable method steps according to the present invention. In addition, the method according to the present invention may be implemented with one or more computer programs, which may be executed by at least one processor or controller.

[0083] In one embodiment, the method steps, apparatus and computer program according to the present invention can be implemented by at least one separate or embedded hardware module.

[0084] The computer program may be stored on at least one computer readable medium, such as a memory circuit, a memory card, a magnetic disk or an optical disk. Some functional entities may be implemented by program modules linked to another functional entity. The functional entities may also be stored in separate memories and executed by separate processors, which may communicate via, for example, a message bus. An example of such a message bus may be a Peripheral Component Interconnect (PCI) bus.

[0085] The terms and expressions used herein are for descriptive purposes only and the present application should not be limited to these terms and expressions. The use of these terms and expressions does not mean to exclude any equivalent features of the illustrations and descriptions (or parts thereof), and it should be recognized that various modifications that may exist should also be included in the scope of the claims. Other modifications, variations and substitutions may also exist. Accordingly, the claims should be deemed to cover all such equivalents.

[0086] Similarly, it should be pointed out that although the present application has been described with reference to the current specific embodiments, ordinary technicians in this technical field should realize that the above embodiments are only used to illustrate the present application, and various equivalent changes or substitutions may be made without departing from the spirit of the invention. Therefore, as long as the changes and modifications to the above embodiments are within the essential spirit of the present application, they will fall within the scope of the claims of the present application.

Claims

1. A preheating control method for a heated smoking device, the heated smoking device comprising: A heating chamber, a power supply, a heater and a controller, wherein the heater is used to heat an aerosol-forming substrate contained in the heating chamber during operation to generate an aerosol, and the controller controls the power supply to provide electrical energy to the heater according to heating operating parameters, wherein the preheating control method comprises: Step 1: The controller starts the heater and controls the heater to enter a preheating stage; Step 2: the controller acquires a first preheating temperature of the heater at a first time point after entering the preheating stage; Step 3: the controller adjusts the heating operating parameters according to the first preheating temperature so that the heater reaches the target preheating temperature at a second time point in the preheating stage; Step 4: When the heater reaches the target preheating temperature at the second time point of the preheating stage, the controller controls the heater to maintain the target preheating temperature until the third time point of the preheating stage, and the preheating stage is completed.

2. The preheating control method according to claim 1, characterized in that: The heating operating parameters are parameters related to any one or more of the following combinations: current flowing through at least a portion of the heater, voltage of at least a portion of the heater, a boost module acting on the heater, and resistance of at least a portion of the heater.

3. The preheating control method according to claim 2, characterized in that: Adjusting the resistance of at least a portion of the heater includes: increasing / decreasing the series resistance of the heater, switching the series resistance of the heater to a larger / smaller value.

4. The preheating control method according to claim 1, characterized in that: The step 3 specifically includes: The controller determines whether the first preheating temperature exceeds a preset temperature threshold range. If so, the controller adjusts the heating operating parameters to control the rate of reducing or increasing the preheating temperature of the heater.

5. The preheating control method according to claim 4, characterized in that: The adjusted preheating temperature rate is: Among them, v T is the adjusted preheating temperature rate, T2 is the target preheating temperature, T1 is the first preheating temperature, t2 is the second time point, and t1 is the first time point.

6. The preheating control method according to claim 1, characterized in that: (t3-t0) is 5-8, 8-12, 12-18, 18-24, 24-32 or 32-40 seconds, wherein t3 is the third time point and t0 is the start time point of the preheating stage.

7. The preheating control method according to claim 1, characterized in that: Among them, t3 is the third time point, t2 is the second time point, and t0 is the start time point of the preheating stage.

8. A heated smoking device, characterized in that: It comprises a memory and a processor, wherein the memory stores computer-readable instructions, and when the computer-readable instructions are executed by the processor, the processor executes a preheating control method as described in any one of claims 1 to 7.

9. A non-volatile readable storage medium storing computer-readable instructions, characterized in that: When the computer-readable instructions are executed by a processor, the processor is caused to execute a pre-heating control method configured to heat a smoking article as described in any one of claims 1 to 7.

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