Heating non-combustion device and heating control method thereof

Abstract

The invention discloses a heat-not-burn device and a heating control method thereof, and the heating control method comprises the steps: in a preheating stage, controlling a heating assembly to heat an aerosol-forming substrate, so that the aerosol-forming substrate firstly rises to a first temperature from an initial temperature; in the maintaining stage, the heating assembly is controlled to heat the aerosol-forming substrate so that the aerosol-forming substrate can be maintained at a second temperature, and the second temperature is smaller than or equal to the first temperature. According to the technical scheme, due to the fact that microwave heating is adopted, the aerosol-forming substrate does not need to reach a high temperature in the preheating stage any more, and the aerosol-forming substrate can be kept at the same temperature (the second temperature) all the time after preheating is finished and before smoking is finished.

Description

Technical Field

[0001] The present invention relates to the atomization field, and in particular to a heat-not-burn device and a heating control method thereof. Background Art

[0002] Since the current main heating methods of heat-not-burn devices are resistance heating, electromagnetic heating, etc., when controlling the heating of a heat-not-burn device, in order to make the aerosol-forming matrix produce smoke quickly, during the preheating stage, the aerosol-forming matrix needs to be heated to a relatively high temperature, such as 340-400 degrees Celsius, to achieve a better smoking effect. During the suction stage, in order to prevent the taste from being burnt, the aerosol-forming matrix needs to be cooled. Even after cooling, in order to prevent the amount of aerosol generated in the later stage from decreasing, the heating temperature of the aerosol-forming matrix needs to be increased again. However, in this heating control method, since the heating element heats the aerosol-forming matrix through heat transfer, for example, if the heating element is located in the central part of the sol-forming matrix during heating, the heating element needs to be heated to a relatively high temperature initially to heat the central part of the aerosol-forming matrix first, and then the central part conducts heat to the lower temperature area at the edge. And due to the temperature increase in the initial stage, part of the central part of the aerosol-forming matrix will be repeatedly heated, which is likely to cause a burnt feeling during actual user suction. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a heat-not-burn device and a heating control method thereof in view of the technical defect that a burnt feeling is easily generated during user suction in the prior art.

[0004] The technical solution adopted by the present invention to solve its technical problem is to construct a heating control method for a heat-not-burn device, the heat-not-burn device including a heating assembly, the heating assembly being a microwave heating assembly, including:

[0005] During the preheating stage, controlling the heating assembly to heat the aerosol-forming matrix so that the aerosol-forming matrix first rises from the initial temperature to a first temperature;

[0006] During the maintaining stage, controlling the heating assembly to heat the aerosol-forming matrix so that the aerosol-forming matrix is maintained at a second temperature, wherein the second temperature is less than or equal to the first temperature.

[0007] Preferably, the second temperature is less than the first temperature, and moreover, between the preheating stage and the maintaining stage, there is also included:

[0008] After reaching the first temperature, if the first suction action is not detected within a preset period, control the heating of the aerosol-forming substrate so that the aerosol-forming substrate drops from the first temperature to the second temperature;

[0009] Or,

[0010] When the end of the first suction action is detected, control the heating of the aerosol-forming substrate so that the aerosol-forming substrate drops from the first temperature to the second temperature.

[0011] Preferably, the preheating stage is less than or equal to 5 seconds.

[0012] Preferably, the difference between the first temperature and the second temperature is 0 to 30 degrees.

[0013] Preferably, during the preheating stage, controlling the heating component to heat the aerosol-forming substrate includes:

[0014] During the preheating stage, control the heating component to heat the aerosol-forming substrate at a preset power.

[0015] Preferably, during the maintaining stage, controlling the heating component to heat the aerosol-forming substrate so that the aerosol-forming substrate is maintained at the second temperature includes:

[0016] During the maintaining stage, obtain the current temperature of the aerosol-forming substrate;

[0017] Calculate the current difference between the second temperature and the current temperature, and determine the current power of the heating component according to the current difference;

[0018] Control the heating component to heat the aerosol-forming substrate at the current power so that the aerosol-forming substrate is maintained at the second temperature.

[0019] Preferably, determining the current power of the heating component according to the current difference includes:

[0020] According to a preset relationship table, determine the current power of the heating component corresponding to the current difference, where the relationship table includes multiple temperature ranges and the heating power corresponding to each temperature range.

[0021] Preferably, the step of obtaining the current temperature of the aerosol-forming substrate includes:

[0022] Obtain the temperature of the heating component from the temperature measuring component provided on the heating component, and obtain the temperature of the aerosol-forming substrate according to the temperature of the heating component.

[0023] The present invention also constructs a heat-not-burn device, including:

[0024] A heating component for heating an aerosol-forming substrate, the heating component being a microwave heating component;

[0025] A battery component for providing power supply to the heating component;

[0026] A control component, and the control component is configured to:

[0027] In a preheating stage, control the heating component to heat the aerosol-forming substrate so that the aerosol-forming substrate first rises from an initial temperature to a first temperature;

[0028] In a maintaining stage, control the heating component to heat the aerosol-forming substrate so that the aerosol-forming substrate is maintained at a second temperature, wherein the second temperature is less than or equal to the first temperature.

[0029] Preferably, the microwave heating component includes:

[0030] An outer conductor unit, and the outer conductor unit includes a closed end and an open end opposite to the closed end; a receiving cavity provided in the outer conductor unit for receiving the aerosol-forming substrate;

[0031] A microwave generating unit for generating microwave signals;

[0032] A microwave feeding unit for feeding the microwave signals generated by the microwave generating unit;

[0033] An inner conductor unit, and the inner conductor unit includes a microwave matching structure and a microwave radiation structure combined on the microwave matching structure. Wherein, the bottom of the microwave matching structure is connected to the closed end of the outer conductor unit and is in ohmic contact with the end wall of the closed end to form a short circuit end of the microwave heating component; one end of the microwave radiation structure is combined on the top of the microwave matching structure, and the other end of the microwave radiation structure is located in the receiving cavity to form an open circuit end of the microwave heating component.

[0034] Preferably, the control component includes a controller and a switching power supply, wherein,

[0035] The switching power supply is used to convert the output voltage of the battery component into a corresponding voltage under the control of the controller and output it to the heating component.

[0036] According to the technical solution of the present invention, since the heating component is a microwave heating component, that is, the aerosol-forming matrix is ​​heated by microwave heating, and compared with the traditional heating methods of heat transfer such as resistance and electromagnetic, the microwave heating method has the following two characteristics: 1. The energy radiated by microwaves is relatively high (the operating frequency is high, generally set to 2.45G), which can make the aerosol-forming matrix instantly heated; 2. Microwaves have strong penetrability, which can make the entire interior of the aerosol-forming matrix (diameter not exceeding 8mm) heated and heated almost simultaneously, forming a body heat source state. These two characteristics make it possible: 1. The distal part of the aerosol-forming matrix with a higher heating element can directly obtain the energy provided by the microwave heating component, and it is no longer necessary to make the proximal part of the aerosol-forming matrix close to the heating element reach a higher temperature in the preheating stage, and then transfer the temperature to the distal part by heat conduction; 2. The aerosol-forming matrix can be maintained at the same temperature (second temperature) after the preheating ends and before the suction ends. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0038] Figure 1 It is a flow chart of a first embodiment of a heating control method for a heating without burning device of the present invention;

[0039] Figure 2 is a schematic diagram of a temperature control curve in one embodiment of the present invention;

[0040] Figure 3 is a schematic diagram of a temperature control curve in another embodiment of the present invention;

[0041] Figure 4 is a schematic diagram of a temperature control curve and a temperature detection curve in one embodiment of the present invention;

[0042] Figure 5 It is a logical structure diagram of the first embodiment of the heating without burning device of the present invention;

[0043] Figure 6A , Figure 6B It is a structural diagram of a first embodiment of a heating without burning device according to the present invention. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0045] Figure 1 FIG. 4 is a flowchart of the first embodiment of the heating control method of the heat-not-burn device of the present invention. The heating control method of this embodiment is applied to the control component of the heat-not-burn device. The heat-not-burn device further includes a heating component, a battery component, a temperature measuring component, etc. Among them, the battery component provides power supply to the heating component; the temperature measuring component is used to detect the temperature of the aerosol-forming substrate; the heating component is used to heat the aerosol-forming substrate. Moreover, the heating component is a microwave heating component, that is, the aerosol-forming substrate is heated by microwave. In addition, the positional relationship between the heating component and the aerosol-forming substrate can have various forms. For example, it can be: at least part of the heating component is arranged at the center of the aerosol-forming substrate, that is, the heating method is central or internal heating; the heating component is arranged at the end of the aerosol-forming substrate, that is, the heating method is end heating; the heating component is arranged on the periphery of the aerosol-forming substrate, that is, the heating method is peripheral heating.

[0046] As Figure 1 shown, the heating control method of this embodiment includes the following steps:

[0047] Step S10, in the preheating stage, control the heating component to heat the aerosol-forming substrate so that the aerosol-forming substrate first rises from the initial temperature to the first temperature;

[0048] In this step, heating can be started by long-pressing the button on the heat-not-burn device, or heating can be automatically started when it is detected that the aerosol-forming substrate is inserted, and the preheating stage is entered. Moreover, since the heating component is a microwave heating component and the energy radiated by the microwave is relatively high, the aerosol-forming substrate can be instantaneously heated up, so the preheating can be completed in a relatively short time, that is, the preheating stage is less than or equal to 5 seconds. For example, when using microwave to heat a Marlboro cigarette with a tobacco segment weight of 0.28 g, continuous heating with 20 W of energy for 2 seconds can raise the temperature of the tobacco segment of the cigarette from room temperature of 25 °C to above 260 °C. Therefore, compared with the existing resistance or electromagnetic heating methods, the preheating time is greatly saved, the waiting time of the user is reduced, and the user experience is improved.

[0049] Step S20, in the maintaining stage, control the heating component to heat the aerosol-forming substrate so that the aerosol-forming substrate is maintained at the second temperature, where the second temperature is less than or equal to the first temperature.

[0050] In this step, during the holding stage after preheating, the aerosol-forming substrate is maintained at a second temperature, where the difference between the first temperature and the second temperature is 0 to 30 degrees. Preferably, the difference between the first temperature and the second temperature is: 0 degree, 5 degrees, 10 degrees, 15 degrees, 20 degrees, 25 degrees, 30 degrees, etc.

[0051] In this embodiment, since the heating component is a microwave heating component, that is, the aerosol-forming substrate is heated by microwave heating. Compared with traditional heating methods such as resistance and electromagnetic heat transfer, microwave heating has the following two characteristics: 1. The energy radiated by the microwave is relatively high (the working frequency is high, generally set to 2.45G), which can cause the aerosol-forming substrate to heat up instantaneously; 2. The microwave has strong penetrability, which will cause the entire interior of the aerosol-forming substrate (with a diameter not exceeding 8 mm) to be heated and raised in temperature almost simultaneously, forming a volume heat source state. These two characteristics result in: 1. The aerosol-forming substrate no longer needs to reach a relatively high temperature during the preheating stage. For example, it can reach 305 degrees (i.e., the first temperature is 305 degrees); 2. The aerosol-forming substrate can be maintained at the same temperature (the second temperature) from the end of preheating until the end of suction.

[0052] In a specific embodiment, as Figure 2 shown, the second temperature is equal to the first temperature. That is, by controlling the heating component to heat the aerosol-forming substrate, the temperature of the aerosol-forming substrate is satisfied: it rises from the initial temperature to the first temperature during the preheating stage; it remains at this first temperature during the holding stage. That is, after the heat-not-burn device is started to heat, the aerosol-forming substrate will be quickly heated up to the first temperature, and then this temperature will be maintained unchanged throughout the process until the suction process ends.

[0053] Furthermore, in an alternative embodiment, the second temperature is lower than the first temperature. Moreover, between step S10 and step S20, it further includes:

[0054] After reaching the first temperature, if no first suction action is detected within a preset period, control the heating of the aerosol-forming substrate to make the aerosol-forming substrate drop from the first temperature to the second temperature.

[0055] In this embodiment, in order to increase the amount of aerosol generated during the user's first puff, the target temperature (the first temperature) of the aerosol-forming substrate during the preheating stage can be set slightly higher than the target temperature (the second temperature) during normal puffing. For example, the first temperature is 5 to 15 degrees higher than the second temperature. Then, if the user does not puff in time after the preheating is completed, the temperature of the aerosol-forming substrate is reduced to the second temperature and maintained until the end of the entire puffing process. That is, if the user does not puff within a preset period after the preheating is completed, the maintaining stage occurs at the end of the preset period after the preheating.

[0056] In another alternative embodiment, the second temperature is lower than the first temperature, and further, between step S10 and step S20, it further includes:

[0057] When it is detected that the first puffing action ends, control the heating of the aerosol-forming substrate so that the aerosol-forming substrate drops from the first temperature to the second temperature.

[0058] In this embodiment, in order to increase the amount of aerosol generated during the user's first two puffs, the target temperature (the first temperature) of the aerosol-forming substrate during the preheating stage and the target temperature during the first puff can be set slightly higher than the target temperature (the second temperature) during subsequent puffs (for example, the difference between the two is 5 to 15 °C). Then, after the first puff ends, the temperature is reduced to the second temperature and maintained until the end of the entire puffing process. That is, the maintaining stage occurs after the first puff ends.

[0059] In a specific embodiment, as Figure 3 shown, the second temperature is lower than the first temperature, that is, by controlling the heating component to heat the aerosol-forming substrate, the temperature of the aerosol-forming substrate satisfies: rising from the initial temperature to the first temperature T1 during the preheating stage (0 - t1); if the user's first puffing action is not detected within the preset period (t1 - t2), or when it is detected that the first puffing action ends, the temperature drops to the second temperature T2, and then this temperature is maintained unchanged throughout the whole process until the puffing process ends.

[0060] Further, in an alternative embodiment, step S10 includes: during the preheating stage, controlling the heating component to heat the aerosol-forming substrate at a preset power. In this embodiment, in order to shorten the preheating time, a constant-power heating control method can be adopted, and preferably, the maximum output power (such as 20 W) is used as the preset power for heating until the temperature of the aerosol-forming substrate reaches the first temperature.

[0061] Further, in an alternative embodiment, the heat-not-burn device further includes a temperature measuring component, and step S20 includes:

[0062] During the maintaining stage, obtain the current temperature of the aerosol-forming substrate;

[0063] Calculate a current difference between the second temperature and the current temperature, and determine a current power of the heating component according to the current difference;

[0064] Control the heating component to heat the aerosol-forming substrate at the current power so that the aerosol-forming substrate is maintained at the second temperature.

[0065] Regarding this embodiment, it should be noted that in the microwave heating method, since the frequency of the microwave (such as 2.45G) is relatively high, if the traditional PID control method is adopted, the differentiator in the PID control scheme will be sensitive to the high-frequency signal generated by the microwave heating component, affecting the control accuracy. At the same time, during frequent on-off processes, there will be obvious noise in the power supply part of the heat-not-burn device. Based on this, in order to stabilize the control accuracy and eliminate noise signals in this embodiment, temperature judgment and power adjustment can be performed periodically. For example, temperature judgment and power adjustment are performed every 20 ms. Moreover, each heating power is related to the difference between the current temperature and the target temperature (the second temperature), so that after controlling according to the current heating power, the current actual temperature of the aerosol-forming substrate is equal to the target temperature.

[0066] Further, in an alternative embodiment, determining the current power of the heating component according to the current difference may specifically include: determining the current power of the heating component corresponding to the current difference according to a preset relationship table, where the relationship table includes a plurality of temperature ranges and the heating power corresponding to each temperature range. In this embodiment, a plurality of temperature ranges and the heating power corresponding to each temperature range can be preset in advance. In actual application, after calculating the difference between the current temperature and the target temperature, the heating power of the heating component is determined by looking up the table according to the difference.

[0067] Further, in an alternative embodiment, the step of obtaining the current temperature of the aerosol-forming substrate includes: obtaining the temperature of the heating component from a temperature measuring component provided on the heating component, and obtaining the temperature of the aerosol-forming substrate according to the temperature of the heating component. In this embodiment, the temperature measuring component can be, for example, a thermocouple, which is used to detect the temperature of the heating component, such as detecting the temperature of the outer wall of the heating component, and then controlling the heating temperature of the aerosol-forming substrate by controlling the temperature of the heating component. Therefore, the temperature of the heating component and the temperature of the aerosol-forming substrate have a positive correlation. In some applications, the temperature of the heating component can be used to characterize the temperature of the aerosol-forming substrate. For example, the temperature of the heating component detected can be directly used as the temperature of the aerosol-forming substrate.

[0068] In a specific embodiment, if the following four levels of power are set in advance: 20W, 15W, 10W, 5W, 0W, and the corresponding temperature ranges are: greater than 15 degrees; 10 - 15 degrees; 5 - 10 degrees; 0 - 5 degrees; less than 0 degrees. In practical applications, if the target temperature is greater than the current actual temperature and the difference exceeds 15°C, then a heating power of 20W is used to heat the heating component; if the target temperature is greater than the current actual temperature and the difference is within 10 - 15°C, then a heating power of 15W is used to heat the heating component; if the target temperature is greater than the current actual temperature and the difference is within 5 - 10°C, then a heating power of 10W is used to heat the heating component; if the target temperature is greater than the current actual temperature and the difference is within 5 degrees, then a heating power of 5W is used to heat the heating component; if the target temperature is less than the current actual temperature, the heating for this cycle can be stopped. As Figure 4 shown, curve L1 is the set target temperature curve (i.e., the temperature control curve), and curve L2 is the actual temperature curve obtained by detecting with the temperature measuring component. When controlling using the above heating control method, as Figure 4 shown, the heating rate is fast during the preheating stage, and moreover, it can well maintain the actual temperature within the range of the target temperature ±3°C, that is, the actual temperature curve L2 approaches the target temperature curve L1.

[0069] Figure 5 Figure 8 is the logical structure diagram of the first embodiment of the heat-not-burn device of the present invention. The heat-not-burn device of this embodiment includes a heating component 1, a control component 2, a battery component 3, and a temperature measuring component 4. Among them, the heating component 1 is used to heat the aerosol-forming substrate, and moreover, the heating component 1 is a microwave heating component; the battery component 3 is used to supply power to the heating component 1; the control component 2 is configured to:

[0070] In the preheating stage, control the heating component to heat the aerosol-forming substrate so that the aerosol-forming substrate first rises from the initial temperature to the first temperature;

[0071] In the maintaining stage, control the heating component to heat the aerosol-forming substrate so that the aerosol-forming substrate is maintained at the second temperature, where the second temperature is less than or equal to the first temperature.

[0072] Further, as Figure 5 shown, the control component 2 includes a controller 21 and a switching power supply 22. Among them, the switching power supply 22 is used to convert the output voltage of the battery component 3 into a corresponding voltage under the control of the controller 21 and output it to the heating component 1.

[0073] Further, in an optional embodiment, refer to Figure 6A 、 6B, in the microwave heating assembly 1 of this embodiment, a microwave field acting on the aerosol-forming substrate 200 is formed within its own cavity 113 to achieve microwave heating. Among them, the aerosol-forming substrate 200 is a solid aerosol-forming substrate such as a processed plant leaf product. It can be understood that in some other embodiments, the aerosol-forming substrate 200 can also be a liquid aerosol-forming substrate.

[0074] As Figure 6A shown, the overall shape of the microwave heating assembly 1 is generally cylindrical in some embodiments. Of course, the microwave heating assembly 1 is not limited to a cylindrical shape and can also be in other shapes such as a square column or an elliptical cylinder. Combining Figure 6B , the microwave heating assembly 1 may include an outer conductor unit 11, an inner conductor unit 12, a receiving seat 13, a microwave generating unit (not shown), and a microwave feeding unit 14.

[0075] The outer conductor unit 11 has a closed end 111 and an open end 112 opposite to the closed end 111, and can define a semi-closed cavity 113. The inner wall surface of the cavity 113 is electrically conductive. The inner conductor unit 12 includes a microwave matching structure 121 and a microwave radiation structure 122 coupled to the microwave matching structure 121. The bottom of the microwave matching structure 121 is connected to the closed end 111 of the outer conductor unit 11 and is in ohmic contact with the end wall of the closed end 111 to form the short-circuit end of the microwave heating assembly 1. One end of the microwave radiation structure 122 is coupled to the top of the microwave matching structure 121, and the other end of the microwave radiation structure 122 is located in the cavity 113 but is not in direct contact with the outer conductor unit 11 to form the open-circuit end of the microwave heating assembly 1. The microwave feeding unit 14 is detachably mounted on the outer conductor unit 11 for feeding the microwave generated by the microwave generating unit into the cavity 113. The receiving seat 13 is fixedly or detachably mounted at the open end 112 of the outer conductor unit 11. It defines a receiving cavity 130 for receiving the aerosol-forming substrate 200. The end of the microwave radiation structure 122 away from the microwave matching structure 121 extends and inserts into the receiving cavity 130. The receiving seat 13 may include a receiving portion and a fixing portion integrally connected to the receiving portion. The receiving portion may be cylindrical, and its outer diameter is smaller than the inner diameter of the outer conductor unit 11. It is installed in the cavity 113 and defines an axial receiving cavity 130 for receiving the aerosol-forming substrate 200. Moreover, the bottom of the receiving portion is a closed design and has a bottom wall surface 1311 for supporting the aerosol-forming substrate 200.

[0076] Understandably, the aerosol-forming matrix 200 may be partially / entirely inserted into the receiving cavity 130, and in this case, part of the structure of the microwave radiation structure 122 is inserted into the interior of the aerosol-forming matrix 200. When the microwave generating unit feeds microwaves through the microwave feeding unit 14, a microwave energy field may be formed around the microwave radiation structure 122 to heat the interior of the aerosol-forming matrix 200. In conjunction with the user's suction action, the airflow is driven, and the aerosol formed by mixing the air and the medium generated after heating can be introduced into the user's oral cavity along the airflow direction.

[0077] Furthermore, in order to control the microwave energy field distribution so that the microwave energy field distribution of the aerosol-forming substrate can be more biased toward the bottom of the aerosol-forming substrate, the microwave heating assembly further includes a microwave field regulating structure (not shown) disposed in the cavity 113, the microwave field regulating structure being integrated with the inner peripheral side wall of the outer conductor unit 11 or in ohmic contact with the inner peripheral side wall of the outer conductor unit 11. The microwave field regulating structure surrounds the periphery of the receiving cavity 130, and the microwave field regulating structure includes a top wall facing the open end 112, the top wall being closer to the closed end 111 than the first free end, that is, the top of the microwave field regulating structure 15 is lower in height than the end of the microwave radiation structure 122 adjacent to the open end 112.

[0078] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A heating control method for a heating without burning device, the heating without burning device comprising a heating component, the heating component being a microwave heating component, It is characterized in that include: In the preheating stage, the heating component is controlled to heat the aerosol-forming substrate so that the aerosol-forming substrate is first raised from an initial temperature to a first temperature; During the maintenance phase, the heating component is controlled to heat the aerosol-forming substrate so as to maintain the aerosol-forming substrate at a second temperature, wherein the second temperature is less than or equal to the first temperature.

2. The heating control method of the heat-not-burn device according to claim 1, It is characterized in that The second temperature is lower than the first temperature, and between the preheating stage and the maintaining stage, the method further comprises: After reaching the first temperature, if no first puff is detected within a preset period of time, controlling the heating of the aerosol-forming substrate so as to reduce the aerosol-forming substrate from the first temperature to a second temperature; or, Upon detecting the end of a first puff, heating of the aerosol-forming substrate is controlled such that the aerosol-forming substrate is cooled from the first temperature to a second temperature.

3. The heating control method of the heating without burning device according to claim 1, It is characterized in that The preheating stage is less than or equal to 5 seconds.

4. The heating control method of the heat-not-burn device according to claim 1, It is characterized in that The difference between the first temperature and the second temperature is 0 to 30 degrees.

5. The heating control method of the heat-not-burn device according to any one of claims 1 to 4, It is characterized in that In the preheating stage, controlling the heating component to heat the aerosol-forming substrate includes: During the preheating stage, the heating component is controlled to heat the aerosol-forming substrate at a preset power.

6. The heating control method of the heat-not-burn device according to any one of claims 1 to 4, It is characterized in that In the maintenance phase, controlling the heating component to heat the aerosol-forming substrate so as to maintain the aerosol-forming substrate at a second temperature comprises: During the maintenance phase, obtaining the current temperature of the aerosol-forming substrate; calculating a current difference between the second temperature and the current temperature, and determining a current power of the heating component according to the current difference; The heating component is controlled to heat the aerosol-forming substrate at a current power so as to maintain the aerosol-forming substrate at a second temperature.

7. The heating control method of the heat-not-burn device according to claim 6, It is characterized in that Determining the current power of the heating component according to the current difference includes: The current power of the heating component corresponding to the current difference is determined according to a preset relationship table, wherein the relationship table includes a plurality of temperature ranges and the heating power corresponding to each temperature range.

8. The heating control method of the heat-not-burn device according to claim 6, It is characterized in that The step of obtaining the current temperature of the aerosol-forming substrate comprises: Obtain the temperature of the heating component from the temperature measuring component provided on the heating component, and obtain the temperature of the aerosol-forming substrate based on the temperature of the heating component.

9. A heat-not-burn device, characterized in that, it includes: a heating component for heating an aerosol-forming substrate, and the heating component is a microwave heating component; a battery component for providing power supply to the heating component; a control component, and the control component is configured to: in a preheating stage, control the heating component to heat the aerosol-forming substrate so that the aerosol-forming substrate first rises from an initial temperature to a first temperature; in a maintaining stage, control the heating component to heat the aerosol-forming substrate so that the aerosol-forming substrate is maintained at a second temperature, wherein the second temperature is less than or equal to the first temperature.

10. The heat-not-burn device according to claim 9, characterized in that, the microwave heating component includes: an outer conductor unit (11), and the outer conductor unit (11) includes a closed end (111) and an open end (112) opposite to the closed end (111); a receiving cavity (130) provided in the outer conductor unit (11) for receiving the aerosol-forming substrate; a microwave generating unit for generating microwave signals; a microwave feeding unit for feeding the microwave signals generated by the microwave generating unit; an inner conductor unit, and the inner conductor unit includes a microwave matching structure (121) and a microwave radiation structure (122) combined with the microwave matching structure (121), wherein the bottom of the microwave matching structure (121) is connected to the closed end (111) of the outer conductor unit (11) and is in ohmic contact with the end wall of the closed end (111) to form a short circuit end of the microwave heating component; one end of the microwave radiation structure (122) is combined on the top of the microwave matching structure (121), and the other end of the microwave radiation structure (122) is located in the receiving cavity (130) to form an open circuit end of the microwave heating component.

11. The heat-not-burn device according to claim 9, characterized in that, the control component includes a controller and a switching power supply, wherein, the switching power supply is used to convert the output voltage of the battery component into a corresponding voltage under the control of the controller and output it to the heating component.

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