Temperature control method and temperature control system applicable to aerosol generators

Abstract

The present invention provides a temperature control method and a temperature control system applicable to an aerosol generator (100). The temperature control system comprises a temperature measuring unit (20), a temperature measuring module (31), an adjustment signal generation module (32), and a power control module (33), the temperature measuring module (31), the adjustment signal generation module (32), and the power control module (33) being installed within a control unit (30). The temperature control method is applied to the aerosol generator (100) and acquires a temperature signal from the housing (111). Based on the temperature signal and the target temperature, an adjustment signal is generated using a preset algorithm. Based on the adjustment signal, the heating power of the heating element (112) is controlled to adjust the temperature of the heating element (112), thereby stably adjusting the temperature of the aerosol-forming substrate. This improves atomization stability and enhances the user experience.

Description

Technical Field

[0004] , ,

[0001] The present invention relates to the technical field of heat-non-burning atomization, and particularly to a temperature control method and a temperature control system applied to an aerosol generating device.

Background Art

[0002] In the technical field of HNB (heat-non-burning) atomization, a general aerosol generating device adopts an atomization method that atomizes an aerosol forming substrate based on the heat transfer effect by heat conduction. The aerosol forming substrate is inserted into an atomization chamber, power is supplied to a heating element in the atomization chamber, and after the heating element converts the power into thermal energy, the aerosol forming substrate is atomized by high temperature to form an aerosol. Since such an atomization method mainly transfers heat by the heat conduction method, a heat transfer temperature difference is likely to occur, and there is a large difference in the degree of atomization of the aerosol forming substrate at positions with different distances from the heating element. In the early stage and the later stage of atomization, a phenomenon of insufficient atomization occurs.

[0003] In order to improve the atomization performance, an atomization method based on the heat transfer effect by thermal radiation and the heat transfer effect by heat conduction can be adopted to atomize the aerosol forming substrate. When power is supplied, the heating element is heated and emits infrared rays. Due to the light wave permeability, the infrared rays can be uniformly transmitted in the aerosol forming substrate, so the temperatures of the aerosol forming substrates at different distances from the heating element are relatively uniform. In order to further improve the user experience, it is necessary to control the temperature of the aerosol forming substrate by controlling the heating temperature of the heating element, thereby avoiding situations where the temperature is too high and causes burning, or the temperature is too low and causes insufficient atomization.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The technical problem to be solved by the present invention is to provide a temperature control method and a temperature control system applied to an aerosol generating device.

Means for Solving the Problems

[0005] To solve this technical problem, the present invention employs the following technical solution: A temperature control method applied to an aerosol generator, wherein the aerosol generator comprises a heating element and a housing, the heating element is used to generate infrared radiation to heat an aerosol-forming substrate by electric heating, the heating element and the housing wall of the housing are installed at least partially separated, the housing wall of the housing transmits the infrared radiation, and the method is The steps include acquiring a temperature signal from the housing, The steps include generating an adjustment signal using a preset algorithm based on the temperature signal and the target temperature, The present invention provides a temperature control method that includes the step of adjusting the temperature of a heating element by controlling the heating power of the heating element based on the adjustment signal. Preferably, the temperature of the heating element is adjusted by controlling the heating power of the heating element based on the adjustment signal.

[0006] In the first stage, the heating power of the heating element is controlled based on the adjustment signal, and the temperature of the heating element is raised from the initial temperature to a first temperature. The second stage includes controlling the heating power of the heating element based on the adjustment signal to gradually lower the temperature of the heating element from the first temperature.

[0007] Preferably, the first temperature is between 500°C and 1300°C.

[0008] Preferably, within a first predetermined range after the first stage is completed, a prompt to the user to suction is given, and within a second predetermined range after the second stage is completed, heating is stopped.

[0009] Preferably, the duration of the first stage does not exceed 20 seconds, and the duration of the second stage does not exceed 360 seconds.

[0010] Preferably, the system determines whether the temperature drop of the temperature signal exceeds a threshold within a predetermined time range. If the result is YES, the recorded number of suctions is increased by 1; if the result is NO, the recorded number of suctions is not changed.

[0011] The present invention relates to a temperature control system applied to an aerosol generator, wherein the aerosol generator comprises a heating element and a housing, the heating element is used to generate infrared radiation to heat an aerosol-forming substrate by electric heating, the heating element and the housing wall of the housing are installed at least partially separated, and the housing wall of the housing transmits the infrared radiation. The temperature control system comprises a temperature measurement unit, a temperature measurement module, a control signal generation module, and a power control module. The temperature measuring unit is installed on the inner or outer wall of the housing and is used to detect the temperature of the housing. The temperature measurement module is used to obtain a temperature signal for the housing by monitoring the temperature of the temperature measurement unit in real time. The adjustment signal generation module is used to generate an adjustment signal using a preset algorithm based on the temperature signal and the target temperature. The power control module further provides a temperature control system applied to an aerosol generator, which is used to adjust the temperature of the heating element by controlling the heating power of the heating element based on the adjustment signal.

[0012] Preferably, the power control module further, In the first stage, the heating power of the heating element is controlled based on the adjustment signal, and the temperature of the heating element is raised from the initial temperature to a first temperature. In the second stage, the heating power of the heating element is controlled based on the adjustment signal, and the temperature of the heating element is gradually lowered from the first temperature.

[0013] Preferably, the first temperature is between 500°C and 1300°C. The duration of the first stage shall not exceed 20 seconds, and the duration of the second stage shall not exceed 360 seconds.

[0014] Preferably, the temperature measuring unit includes a first temperature sensor or a second temperature sensor. The first temperature sensor includes a thin-film temperature sensor or a thermistor. The second temperature sensor includes a thermocouple.

[0015] Preferably, the first temperature sensor is connected in series with the first resistor and the temperature measuring switch. The first temperature sensor is used to detect the temperature of the housing, The temperature measurement switch is used to adjust the power supplied to the first temperature sensor by being turned on or off based on the input drive signal.

[0016] Preferably, the second temperature sensor is connected to the temperature measurement module. The second temperature sensor is used to generate a detection signal based on the temperature of the housing. The temperature measurement module is used to generate and output the temperature signal based on the detection signal.

[0017] Preferably, the power control module includes a second resistor, a third resistor, an NMOS transistor, and a PMOS transistor. The gate of the NMOS transistor is connected to the adjustment signal generation module, receives the adjustment signal, and is grounded via the second resistor, and the source of the NMOS transistor is grounded. The gate of the PMOS transistor is connected to the drain of the NMOS transistor, the drain of the PMOS transistor is connected to an input voltage, and the source of the PMOS transistor is connected to the heating element, so as to adjust the heating power of the heating element based on the adjustment signal. The third resistor is connected between the drain and the gate of the PMOS transistor.

[0018] Preferably, the heating element is located inside the housing and includes a heating substrate and an infrared radiation layer coated outside the heating substrate. It is used to excite the infrared radiation layer to generate infrared rays after being powered on. At least a part of the housing is used to insert an aerosol-forming substrate.

[0019] Preferably, the temperature measurement unit includes a first temperature sensor or a second temperature sensor. The first temperature sensor includes a thin-film temperature sensor or a thermistor and is installed on the outer wall of the housing. The second temperature sensor includes a thermocouple and is installed on the inner wall of the housing.

[0020] Preferably, the heating element is installed at intervals on the outer periphery of the housing. The inside of the housing is hollow, and a second accommodation chamber for accommodating an aerosol-forming substrate is formed.

[0021] Preferably, the housing includes a first tube body and a second tube body externally fitted on the outer periphery of the first tube body. A gap is provided between the first tube body and the second tube body, and the gap forms a first accommodation chamber for accommodating the heating element. The heating element is provided on the outer periphery of the first tube body and is installed at intervals from the outer wall of the first tube body. A second accommodation chamber for heating an aerosol-forming substrate is formed inside the first tube body. The heating element includes a heating substrate and an infrared radiation layer coated outside the heating substrate, and is used to excite the infrared radiation layer to generate infrared rays after being powered on.

[0022] Preferably, the temperature measuring unit includes a first temperature sensor or a second temperature sensor. The first temperature sensor includes a thin-film temperature sensor or a thermistor and is installed on the inner wall of the first tube. The second temperature sensor includes a thermocouple and is installed on the outer wall of the first tube. [Effects of the Invention]

[0023] By implementing the present invention, the following beneficial effects can be obtained: The temperature signal of the housing is acquired, an adjustment signal is generated based on the temperature signal and the target temperature, and the temperature of the heating element is adjusted by controlling the heating power of the heating element based on the adjustment signal, thereby stably adjusting the temperature of the aerosol-forming substrate, which improves the stability of atomization and enhances the user experience. [Brief explanation of the drawing]

[0024] The present invention will be further described below with reference to the drawings and embodiments. [Figure 1] Figure 1 is a schematic diagram of the structure of an aerosol generator according to one embodiment of the present invention. [Figure 2] Figure 2 is a schematic diagram of the heat generation structure in the aerosol generator shown in Figure 1. [Figure 3] Figure 3 is a cross-sectional view of the heating structure shown in Figure 2. [Figure 4] Figure 4 is a schematic diagram of the exploded structure of the heat-generating structure shown in Figure 2. [Figure 5] Figure 5 is a block diagram showing the temperature measurement principle of the aerosol generator according to the present invention. [Figure 6] Figure 6 is a circuit diagram of one embodiment shown in Figure 5. [Figure 7] Figure 7 is a circuit diagram of another embodiment shown in Figure 5. [Figure 8] Figure 8 is a schematic diagram showing the temperature change of the heating element. [Figure 9]Figure 9 is a schematic diagram of the structure of an aerosol generator according to another embodiment of the present invention. [Figure 10] Figure 10 is a schematic diagram of the heat-generating structure shown in Figure 9 from a different angle. [Figure 11] Figure 11 is a cross-sectional view of the heating structure shown in Figure 9. [Figure 12] Figure 12 is a schematic diagram of the exploded structure of the heat-generating structure shown in Figure 9. [Figure 13] Figure 13 is a schematic diagram illustrating the mounting of the thin-film temperature sensor according to the present invention. [Figure 14] Figure 14 is a cross-sectional view of the heating element shown in Figure 4. [Modes for carrying out the invention]

[0025] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the invention will be described below with reference to the drawings. Unless otherwise explicitly defined and limited, terms such as "connection" and "installation" should be understood in a broad sense, and may include, for example, fixed connections, removable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections via intermediate elements, internal communication between two elements, or interaction relationships between two elements. Terms such as "first," "second," and "third" are used solely to facilitate the explanation of the technical solution and should not be understood as indicating or implying relative importance or the number of technical features being indicated. Thus, features limited by "first," "second," "third," etc., may explicitly or implicitly include one or more such features. Those skilled in the art will be able to understand the specific meaning of the above terms in the present invention depending on the specific circumstances.

[0026] In the following description, specific details such as particular system structures and techniques are provided for illustrative purposes, not limitation, to enable a full understanding of embodiments of the present invention. However, as those skilled in the art will understand, the present invention can also be implemented in other embodiments where these specific details are absent. In other circumstances, detailed descriptions of well-known systems, apparatus, circuits, and methods are omitted to avoid unnecessary details hindering the explanation of the present invention.

[0027] The present invention provides a temperature control method and a temperature control system applicable to an aerosol generator. The temperature control system may be used to stably adjust the temperature of the aerosol-forming substrate by performing the temperature control method applicable to the aerosol generator disclosed in the embodiments of the present invention and adjusting the temperature of the heating element, thereby improving atomization stability and enhancing the user experience.

[0028] In one embodiment, the aerosol generator 100 can heat the aerosol-forming substrate using a non-combustible heating method, and in some embodiments, the aerosol-forming substrate may be cylindrical and removable from the aerosol generator 100. Specifically, the aerosol-forming substrate may be a filamentous, sheet-like, granular, or integrally molded solid material made from the leaves and / or stems of a plant (e.g., tobacco), and aroma components may be further added to the solid material.

[0029] Furthermore, as shown in Figures 1 and 2, the aerosol generator 100 comprises an upper cover assembly 10, a heating structure 11, a control unit 30, and the temperature control system of the present invention. The temperature control system includes a temperature measuring unit 20, a temperature measuring module 31, an adjustment signal generation module 32, and a power control module 33, the temperature measuring module 31, the adjustment signal generation module 32, and the power control module 33 being installed within the control unit 30.

[0030] The heating structure 11 may be partially inserted into the aerosol-forming substrate. Specifically, the heating structure 11 may be partially inserted at least into the dielectric portion of the aerosol-forming substrate and generate infrared rays when energized to heat the dielectric portion of the aerosol-forming substrate, thereby generating an aerosol after heating.

[0031] As shown in Figures 2 to 4, in this embodiment, the heating structure 11 is a central heating structure and includes a heating element 112, a housing 111, and a base 113. The heating element 112 and the housing 111 are installed at least partially spaced apart, with the heating element 112 located inside the housing 111, and at least a portion of the housing 111 used to insert an aerosol-forming substrate. The heating element 112 is heated by an electric current and generates infrared radiation. For example, a gap 1114 is provided between the housing 111 and the heating element 112, and the gap 1114 can be filled with air, and, as is naturally understood, in some other embodiments, the gap 1114 can also be filled with a reducing gas or an inert gas. The housing 111 accommodates at least a portion of the heating element 112 and can transmit the infrared radiation generated by the heating element 112 to heat the aerosol-forming substrate. Specifically, the housing 111 is capable of transmitting infrared radiation generated by the heating element 112, thereby allowing at least a portion of the infrared radiation generated by the heating element 112 to be absorbed by the aerosol, thereby heating the aerosol-forming substrate. The base 113 is installed in the opening 1110 of the housing 111.

[0032] In this embodiment, the housing 111 is made of a glass material, and for example, the housing 111 may be quartz glass. Alternatively, in some other embodiments, the housing 111 is not limited to quartz glass, but may be made of other window materials that can transmit infrared rays, such as infrared-transmitting glass, transparent ceramics, or diamond.

[0033] In this embodiment, the housing 111 is a hollow tubular structure, i.e., a tubular structure made of transparent quartz glass, with a longitudinal structure and two ends arranged along the axial direction, where the longitudinal structure means that the dimensions of the housing 111 in one direction (e.g., the length direction) are greater than the dimensions in another direction (e.g., the thickness direction). Specifically, the housing 111 includes a tubular body 1111 having a circular cross-section and a pointed structure 1112 installed at one end of the tubular body 1111. Naturally, as will be understood, in some other embodiments, the cross-section of the tubular body 1111 is not limited to a circular shape. The tubular body 1111 is a hollow structure with an opening 1110 at one end. The pointed structure 1112 is installed at the end of the tubular body 1111 away from the opening 1110, and the provision of the pointed structure 1112 facilitates the insertion and removal of at least a portion of the heating structure 11 from the aerosol-forming substrate. In this embodiment, a first containment chamber 1113 is formed inside the housing 111, and the first containment chamber 1113 is a columnar cavity. In this embodiment, the tubular body 1111 is cylindrical, and the pointed structure 1112 is conical. In other embodiments, the housing 111 may be in other forms, such as triangular prism, rectangular parallelepiped, or other shapes. In some other embodiments, the heating element 112 may be spaced around the outer circumference of the housing 111, and a second containment chamber for containing an aerosol-forming substrate may be formed inside the housing 111.

[0034] As shown in Figure 4, in this embodiment, the heating element 112 may be a single piece and may be installed vertically, having a first free end 112d and a second free end 112e. In this embodiment, the heating element 112 is a strip (solid round wire) with a circular cross-section. The heating element 112 is installed with at least a portion bent to form a columnar heating section 1120 as a whole, and specifically, it can be bent to form a spiral columnar heating section 1120. As can be understood, in some other embodiments, the heating element 112 may not be limited to a strip, but may be a vertically elongated sheet or mesh. The heating section 1120 may not be limited to a columnar shape, but may be a sheet, mesh or strip. In some embodiments, the heating element 112 can be wound to form a single helix, double helix, M-shaped, N-shaped or other shaped heating section 1120. Naturally, as can be understood, in some other embodiments, the heating element 112 may be not limited to one but may consist of two or more. Furthermore, in some other embodiments, the heating element 112 may also consist of a metal piece or a metal needle.

[0035] In this embodiment, the heating element 1120 includes a first heating element 112a and a second heating element 112b, with one end of the first heating element 112a and the second heating element 112b connected to each other. In this embodiment, the first heating element 112a and the second heating element 112b are integrally molded structures and may be formed by bending a single heating element 112. As can be understood, in some other embodiments, the first heating element 112a and the second heating element 112b may be separate structures and may each consist of two heating elements 112 connected by welding, riveting, or other means. As can be understood, in some other embodiments, the second heating element 112b may be omitted and replaced with a non-heating conductive rod.

[0036] In this embodiment, a conductive part 1121 is installed at one end of the heating element 1120, and the conductive part 1121 is connected to the heating element 1120 and may also be led out from one end of the housing 111, through the base 113, and electrically connected to the power supply assembly in the control unit 30. In this embodiment, there may be two conductive parts 1121, which are installed at intervals from each other, each connected to the heating element 1120, and installed from the same end of the housing 111, passing through the housing 111. In this embodiment, the conductive part 1121 may be fixed to the heating element 1120 by welding. Naturally, as will be understood, in some other embodiments, the heating element 1120 may be integrally molded with the conductive element 1121, and the first free end 112d and the second free end 112e of the heating element 112 may each form two conductive elements 1121, namely, the first free end 112d of the first heating element 112a forming one conductive element 1121 and the second free end 112e of the second heating element 112b forming the other conductive element 1121. In some other embodiments, the conductive element 1121 may be a lead wire having a lower resistance than the heating element, for example, a lead wire made of silver or aluminum material, and may be welded to the heating element 1120. Naturally, as will be understood, in some other embodiments, the conductive element 1121 may not be limited to a lead wire but may be other conductive structures.

[0037] As shown in Figure 14, in this embodiment, the heating element 1120 includes a heating substrate 1122 and an infrared radiation layer 1124. The heating substrate 1122 can generate heat when energized. The infrared radiation layer 1124 is covered on the outer surface of the heating substrate 1122. When energized and heated, the heating substrate 1122 can excite the infrared radiation layer 1124 to generate infrared rays and radiate them to the outside. In this embodiment, the heating substrate 1122 and the infrared radiation layer 1124 are arranged concentrically in a cross-section of the heating element 1120.

[0038] In this embodiment, the heating element 1122 may be in the form of a strip overall, and its cross-section may be circular. Specifically, the heating element 1122 may be a heating wire. Naturally, as can be understood, in some other embodiments, the heating element 1122 may be in the form of a sheet, i.e., the heating element 1122 may be a heating sheet. The heating element 1122 includes a metal substrate having high-temperature oxidation prevention properties, and the metal substrate may be a metal wire. Specifically, the heating element 1122 may be a metallic material having good high-temperature oxidation prevention properties, high stability, and resistance to deformation, such as a nickel-chromium alloy substrate (e.g., nickel-chromium alloy wire) or an iron-chromium-aluminum alloy substrate (e.g., iron-chromium-aluminum alloy wire). In this embodiment, the radial dimension of the heating element 1122 may be 0.15 mm to 0.8 mm. The metal wire can be bent or wound into various shapes, such as spiral, mesh, M-shaped, or N-shaped, and the heating element after bending or winding may, as a whole, exhibit columnar, spiral segmented, mesh-like, and other three-dimensional or planar shapes having bent sections.

[0039] In this embodiment, the heat-generating section 1120 further includes an antioxidant layer 1123, which is formed between the heat-generating substrate 1122 and the infrared radiation layer 1124. Specifically, the antioxidant layer 1123 may be an oxide film, and the heat-generating substrate 1122 undergoes high-temperature heat treatment to generate a single layer of dense oxide film on its surface, which forms the antioxidant layer 1123. Naturally, as can be understood, in some other embodiments, the antioxidant layer 1123 is not limited to including an oxide film formed by itself, but may be an antioxidant coating applied to the outer surface of the heat-generating substrate 1122. By forming the antioxidant layer 1123, it is possible to ensure that the heat-generating substrate 1122 is not oxidized, or hardly oxidized, when heated in an air environment. This improves the stability of the heat-generating substrate 1122, and furthermore, it eliminates the need to vacuum the first containment chamber 1113 or fill it with reducing gas, simplifying the assembly process of the entire heat-generating structure 11 and saving manufacturing costs. In this embodiment, the thickness of the antioxidant layer 1123 can be selected from 1 μm to 150 μm. If the thickness of the antioxidant layer 1123 is less than 1 μm, the heat-generating substrate 1122 is easily oxidized. If the thickness of the antioxidant layer 1123 is greater than 150 μm, it seriously affects the heat conduction between the heat-generating substrate 1122 and the infrared radiation layer 1124.

[0040] In this embodiment, the infrared radiation layer 1124 may be an infrared layer. The infrared layer may be formed on the side of the antioxidant layer 1123 away from the heat-generating substrate 1122 by high-temperature heat treatment of the infrared layer-forming substrate. In this embodiment, the infrared layer-forming substrate may be silicon carbide, spinel, or a composite substrate thereof. Naturally, as can be understood, in some other embodiments, the infrared radiation layer 1124 is not limited to an infrared layer. In some other embodiments, the infrared radiation layer 1124 may be a composite infrared layer. In this embodiment, the infrared layer may be formed on the side of the antioxidant layer 1123 away from the heat-generating substrate 1122 by methods such as dip coating, spray coating, or brush coating. The thickness of the infrared radiation layer 1124 may be 10 μm to 300 μm, and when the thickness of the infrared radiation layer 1124 is 10 μm to 300 μm, the infrared effect is better, and consequently, the atomization efficiency and mouthfeel of the aerosol-forming substrate 200 are better. Naturally, as can be understood, in some other embodiments, the thickness of the infrared radiation layer 1124 is not limited to 10 μm to 300 μm.

[0041] In this embodiment, unlike existing electronic cigarette heating elements, the maximum operating temperature range of the heating element 112 may be 500°C to 1300°C. That is, throughout the entire operating period of the heating element 112, its maximum operating temperature may be any one of the temperatures between 500°C and 1300°C, and may be specifically determined according to the needs of temperature control. On the other hand, heating elements in the prior art generally have a maximum operating temperature limited to 400°C or less.

[0042] Specifically, as shown in Figure 8, in this embodiment, the heating process of the heating element 112 includes a first stage and a second stage. In the first stage, the temperature of the heating element rises from the initial temperature to a first temperature. In the second stage, the temperature of the heating element gradually decreases from the first temperature, with the first temperature being between 500°C and 1300°C. That is, the first temperature may be 500°C or 1300°C, or any one value between 500°C and 1300°C. The duration of the first stage does not exceed 20 seconds, and the duration of the second stage does not exceed 360 seconds. The first stage may also be a preheating stage, and its maximum temperature may be between 700°C and 1300°C. At this temperature, the aerosol-forming substrate can be preheated in a very short time, and furthermore, the amount of aerosol vapor and mouthfeel for the first approximately three puffs when the user inhales can be ensured. Specifically, when energized, the heating element 112 can rapidly heat up from room temperature to a first temperature, for a duration not exceeding 20 seconds, and in some cases shortened to 3-5 seconds. The second stage may be the suction stage, when the aerosol-forming substrate is preheated and successfully generates an aerosol for the user to draw in, for a duration generally not exceeding 360 seconds, 240 seconds in Figure 8, during which the temperature gradually decreases from around the first temperature. Naturally, as can be understood, in some other embodiments, the division of the heating process of the heating element 112 is not limited to two stages; for example, the suction stage may be further divided into an intermediate suction stage and an end-suction stage, with corresponding heating temperatures set for each. Due to the presence of the gap 1114, the surface temperature of the housing 111 can be controlled to 350°C or less, and the atomization temperature of the entire aerosol-forming substrate can be controlled to 300-350°C, thereby achieving precise atomization of the aerosol-forming substrate mainly in the 2-5 μm infrared wavelength band. In the second stage, the temperature of the heating element is controlled to gradually decrease from the first temperature, which is advantageous because the wavelength of the infrared radiation emitted from the heating element gradually increases, resulting in stronger penetration. On the other hand, by controlling the temperature of the heating element to decrease during the suction stage, the heat conduction effect of the housing on the aerosol-forming substrate is reduced, preventing the aerosol-forming substrate near the tube wall from becoming too hot and causing burnt odors or other unpleasant smells.

[0043] In this embodiment, the temperature measuring unit 20 is installed on the inner or outer wall of the housing 111 and is used to detect the temperature of the housing 111, and includes a first temperature sensor or a second temperature sensor. Referring to Figure 13, the first temperature sensor is installed on the outer wall of the housing of the central heating structure and includes a thin-film temperature sensor (resistive thermometer) or thermistor formed on the housing by methods such as screen printing or PVD (Physical Vapor Deposition). Because thin-film temperature sensors are extremely thin, flexible, and easily deformable, they can adhere relatively smoothly to the housing wall and do not affect the insertion of the aerosol-forming substrate. As can be seen, in some other embodiments, if the thin-film temperature sensor contains a material that is easily oxidized and corroded, the oxidation and corrosion can be prevented and its service life extended by electroplating one or more of the materials gold, nickel, and glass to form a protective layer.

[0044] The second temperature sensor is installed on the inner wall of the housing of the central heating structure and includes a thermocouple. Since the thermocouple is separated from the aerosol-forming substrate by the housing 111, it is not affected by friction from inserting and removing the aerosol-forming substrate, and corrosion from residues generated by atomization, thus providing a higher service life and stability for the thermocouple. Thermocouple measurement does not require an additional external power supply, is easy to use, and can directly measure temperature and convert it into a detection signal.

[0045] Specifically, in this embodiment, the temperature measurement unit 20 may employ a thermocouple, a thermometer, an NTC (negative temperature coefficient thermistor), a PTC (positive temperature coefficient thermistor), etc. Naturally, as can be understood, in some other embodiments, the temperature measurement unit 20 is not limited to the above temperature sensor, but may employ other sensors or temperature measuring elements for detection, as long as the temperature of the housing can be accurately measured.

[0046] Furthermore, as shown in Figure 5, in this embodiment, the temperature measurement module 31 is connected to the temperature measurement unit 20 and is used to obtain a temperature signal of the housing 111 by monitoring the temperature of the temperature measurement unit 20 in real time. In this embodiment, if the temperature measurement unit 20 employs a thermocouple, the temperature measurement module 31 may employ a thermocouple detection IC. Specifically, the thermocouple detection IC is connected to the temperature measurement unit 20 and is used to generate and output a corresponding temperature signal based on the detection signal generated from the temperature measurement unit 20.

[0047] Furthermore, in this embodiment, the adjustment signal generation module 32 may include, but is not limited to, a single-chip microcontroller, a chip, etc., and is used to generate an adjustment signal using a preset algorithm based on a temperature signal and a target temperature. The target temperature may be a preset target temperature of the housing or a target temperature of the heating element. If the target temperature of the housing is adopted, the adjustment signal is generated based on the target temperature of the housing and the measured actual temperature of the housing. If the target temperature of the heating element is adopted, the actual temperature of the heating element is obtained based on the actual temperature of the housing, and then the adjustment signal is generated based on the actual temperature of the heating element and the target temperature of the heating element. The preset algorithm may be, but is not limited to, a PID algorithm, a neural network, or a fuzzy control algorithm. The generated adjustment signal may be a PWM signal, and the output power of the power control module 33 is adjusted by adjusting the duty cycle of the PWM signal.

[0048] Furthermore, the adjustment signal generation module 32 can effectively adjust the temperature changes of the first and second stages of the heating process of the heating element, further adjust the heating temperature of the aerosol-forming substrate, and control its atomization effect. In addition, within a first predetermined range after the completion of the first stage, it can provide a prompt to the user to inhale using methods such as sound, vibration, or flashing of an indicator lamp to improve the user experience, and within a second predetermined range after the completion of the second stage, it can control the heating of the heating element to stop. The first and second predetermined ranges are determined according to the temperature control needs and can be set between 1 and 3 seconds.

[0049] Optionally, the adjustment signal generation module 32 is further used to detect the number of suctions, that is, it determines whether the temperature drop of the temperature signal exceeds a threshold within a predetermined time range. If YES, it increments the recorded number of suctions by 1; if NO, it does not change the recorded number of suctions. When the aerosol generator is started, if the recorded number of suctions is 0, and the temperature signal drops uncontrollably within a predetermined time range t, and the drop is greater than the threshold, it is determined that a suction operation has occurred, and the recorded number of suctions is incremented by 1.

[0050] Furthermore, in this embodiment, the power control module 33 is connected to the heating element 112 and is used to adjust the temperature of the heating element by controlling the heating power of the heating element based on an adjustment signal. The power control module 33 receives an adjustment signal and adjusts the power supplied to the heating element 112 based on the control of the adjustment signal generation module 32, thereby adjusting the temperature of the heating element by controlling its heating power. Specifically, referring to Figure 8, the power control module 33 is used to raise the temperature of the heating element from the initial temperature to a first temperature by controlling the heating power of the heating element based on the adjustment signal, and in the second stage, to gradually lower the temperature of the heating element from the first temperature by controlling the heating power of the heating element based on the adjustment signal. The first temperature is between 500°C and 1300°C, that is, the first temperature may be 500°C or 1300°C, or any one value between 500°C and 1300°C, the duration of the first stage does not exceed 20 seconds, and the duration of the second stage does not exceed 360 seconds. Naturally, as can be understood, in some other embodiments, the second stage may be further divided into an intermediate suction stage and an end-suction stage.

[0051] In this embodiment, the second temperature sensor is connected to the temperature measurement module 31 and is used to generate a detection signal based on the temperature of the housing, and the temperature measurement module 31 is used to generate and output a temperature signal based on the detection signal. As shown in Figure 6, when the temperature measurement unit 20 is the second temperature sensor, i.e., a thermocouple, the temperature measurement module 31 includes a thermocouple detection IC (U6). The fourth pin of the thermocouple detection IC is connected to VDD and grounded via capacitor C25, the second pin of the thermocouple detection IC is connected to the second end of the thermocouple, the third pin of the thermocouple detection IC is connected to the first end of the thermocouple, the fifth pin of the thermocouple detection IC is connected to the 26th pin (not shown) of the adjustment signal generation module 32, and the seventh pin of the thermocouple detection IC is connected to the 27th pin (not shown) of the adjustment signal generation module 32. In this embodiment, the adjustment signal generation module 32 detects the temperature of the thermocouple in real time using a thermocouple detection IC, thereby enabling real-time detection of the temperature of the heating element. Furthermore, based on the temperature change of the thermocouple within a predetermined time range, it determines whether the user performed a suction operation and detects the number of suction operations.

[0052] As shown in Figure 6, in this embodiment, the power control module 33 includes an NMOS transistor Q5 and a PMOS transistor Q3. The source of the NMOS transistor Q5 is grounded, and the gate of the NMOS transistor Q5 is connected to the 12th pin (not shown) of the adjustment signal generation module 32 to receive a PWM signal. The drain of the NMOS transistor Q5 is connected to the gate of the PMOS transistor Q3, and the source of the PMOS transistor Q3 is connected to a battery (BAT). The drain of the PMOS transistor Q3 is connected to the positive terminal of the heating element 112, and the negative terminal of the heating element 112 is grounded. In this embodiment, the NMOS transistor Q5 controls the power supplied from the battery to the heating element 112 by driving the PMOS transistor Q3 on / off based on the PWM signal output from the adjustment signal generation module 32. The longer the on time of the PMOS transistor Q3, the greater the heating power of the heating element 112, and the higher the temperature of the heating element 112, the shorter the wavelength of the generated infrared radiation. Furthermore, the power control module 33 further includes a second resistor R25 and a third resistor R21 for circuit protection, the gate of the NMOS transistor Q5 is grounded via the second resistor R25, and the third resistor R21 is connected between the drain and gate of the PMOS transistor Q3.

[0053] In this embodiment, the first temperature sensor is connected in series with the first resistor and the temperature measuring switch and is used to detect the temperature of the housing, and the temperature measuring switch is used to adjust the power supplied to the first temperature sensor by being turned on or off based on the input drive signal. If the temperature measuring unit 20 employs a thin-film temperature sensor or a thermistor as the first temperature sensor, the temperature measuring module 31 may be implemented by a temperature measuring circuit, the temperature measuring circuit may be implemented by a resistor, and the temperature measuring switch may be implemented by a transistor. Specifically, as shown in Figure 7, the positive terminal of the thin-film temperature sensor is connected to the second terminal of the first resistor R26, the second terminal of the first resistor R26 is further connected to the fourth pin (not shown) of the adjustment signal generation module 32, the first terminal of the first resistor R26 is connected to the sixth pin (not shown) of the adjustment signal generation module 32, the first terminal of the first resistor R26 is further connected to the emitter of transistor Q7, the collector of transistor Q7 is connected to the positive terminal (BAT+) of the battery, and the base of transistor Q7 is connected to the third pin (not shown) of the adjustment signal generation module 32. The adjustment signal generation module 32 controls the on / off state of transistor Q7 by outputting a drive signal to transistor Q7, thereby adjusting and controlling the power supplied to the thin-film temperature sensor / thermistor using transistor Q7.

[0054] In this embodiment, the adjustment signal generation module 32 collects the voltage across the first resistor R26, subtracts the voltage across the first resistor R26 from the power supply voltage (BAT) to obtain the voltage across the thin film temperature sensor / thermistor, divides the voltage across the first resistor R26 by the resistance value of the first resistor R26 to obtain the current flowing through the first resistor R26 (the current flowing through the first resistor R26 is equal to the current flowing through the thin film temperature sensor / thermistor), and finally obtains the resistance value of the thin film temperature sensor / thermistor, thereby realizing temperature detection of the thin film temperature sensor / thermistor.

[0055] Figures 9 to 12 show an aerosol generator 100 according to a second embodiment of the present invention, in which the housing 111 includes a first tube 111a and a second tube 111b, and the first tube 111a has a hollow structure with through ends. The first tube 111a may be cylindrical, and its inner diameter may be slightly larger than the outer diameter of the aerosol-forming substrate. Inside the first tube 111a, a second housing chamber 1115 may be formed to house the aerosol-forming substrate and to form a heating space for heating the dielectric portion of the aerosol-forming substrate. The axial length of the first tube 111a may be greater than the axial length of the second tube 111b. The second pipe 111b may be fitted onto the outer circumference of the first pipe 111a, or it may be cylindrical in shape, and the radial dimension of the second pipe 111b may be larger than the radial dimension of the first pipe 111a, that is, there may be a gap between the second pipe 111b and the first pipe 111a, and this gap can form a first housing chamber 1113, which is used to house the heating element 112. The heating element 112 is provided on the outer circumference of the first pipe 111a and is installed at a distance from the outer wall of the first pipe 111a. In some embodiments, the heating element 112 is wound around the outer circumference of the first tube 111a, and there is a gap 1114 between the inner wall of the second tube 111b and the outer wall of the first tube 111a (i.e., the heating element 112 and the housing 111 are installed at least partially spaced apart), and a predetermined temperature difference can be formed between the inner wall of the first containment chamber 1113 and the heating element 112, thereby providing thermal insulation. In some embodiments, a reflective layer may be installed on the inner wall of the second tube 111b to enhance heating efficiency by reflecting heat from the heating element 112 and radiating it to the aerosol-forming substrate 200.

[0056] In some other embodiments, the heating element 112 is not limited to being installed at a distance from the first pipe 111a or the second pipe 111b. In some other embodiments, the heating element 112 may be installed at a distance from the first pipe 111a in part, and the radial dimension of some segments of the heating element 1120 may be approximately equal to the outer diameter of the first pipe 111a, which can serve as a limiting effect. In some embodiments, the heating element 112 may be installed at a distance from the second pipe 111b in part, and the radial dimension of some segments of the heating element 1120 may be approximately equal to the radial dimension of the second pipe 111b.

[0057] As shown in Figure 11, in this embodiment, the temperature measuring unit 20 is installed on the heating structure 11, and may be installed at a distance from the heating element 112. Furthermore, in this embodiment, as shown in Figure 12, the temperature measuring unit 20 may be installed in close proximity to the opening 1110 of the housing 111. Here, proximity means using the midpoint of the length of the housing 111 as a reference, with the shorter the distance to one end of the opening 1110, the closer the unit is, and the longer the distance to one end of the opening 1110, the further away it is. Specifically, the temperature measuring unit 20 may be installed on the inner wall or outer wall of the housing 111. Since the operating temperature of the optical-infrared heating element 112 is 500°C to 1300°C, there is a gap 1114 between the heating element 112 and the housing 111. Because of the presence of this gap 1114, the surface temperature of the housing 111 can be controlled to 350°C or less. Therefore, if the temperature measuring unit 20 is installed on the inner wall or outer wall of the housing 111, the sensitivity of temperature detection will be higher.

[0058] Furthermore, the temperature measurement unit 20 includes a first temperature sensor or a second temperature sensor. The first temperature sensor is installed on the inner wall of the first tube 111a and includes a thin-film temperature sensor (resistance thermometer) or a thermistor formed on the housing by methods such as screen printing or PVD (Physical Vapor Deposition). The second temperature sensor is installed on the outer wall of the first tube 111a and includes a thermocouple.

[0059] One embodiment of a temperature control method applied to an aerosol generator of the present invention includes the following steps. Step S1: The temperature signal of the housing 111 is acquired. Since the housing 111 is in close contact with the aerosol-forming substrate, heat can be transferred between them by thermal conduction. By acquiring test data or historical data when the aerosol-forming substrate atomizes and generates aerosols, the temperature conversion relationship between the temperature of the aerosol-forming substrate and the temperature of the housing 111, and the temperature conversion relationship between the temperature of the aerosol-forming substrate and the temperature of the heating element can be acquired. Therefore, the actual temperature of the heating element and the actual temperature of the aerosol-forming substrate can be derived based on the actual temperature of the housing 111 and the conversion relationship. The temperature measurement unit 20 acquires the actual temperature of the housing 111 in real time, allowing the temperature of the heating element to be adjusted, and further adjusting the temperature of the aerosol-forming substrate to control its atomization effect.

[0060] Step S2 A regulating signal is generated using a preset algorithm based on the temperature signal and the target temperature. Specifically, the target temperature may be the target temperature of the housing or the target temperature of the heating element. After determining the substrate target temperature of the aerosol-forming substrate, the target temperature of the heating element or the target temperature of the housing 111 can be determined. Therefore, if the target temperature of the housing is adopted, the regulating signal generation module performs a series of calculations using a preset algorithm, such as a PID algorithm, a neural network, or a fuzzy control algorithm, based on the target temperature of the housing and the measured actual temperature of the housing, to obtain the regulating signal. If the target temperature of the heating element is adopted, the regulating signal generation module obtains the actual temperature of the heating element based on the actual temperature of the housing, and then generates a regulating signal based on the actual temperature of the heating element and the target temperature of the heating element.

[0061] Step S3: The temperature of the heating element 112 is adjusted by controlling its heating power based on the adjustment signal. Specifically, the adjustment signal of the input power control module is a PWM signal, and by adjusting the duty cycle of the PWM signal, the heating power of the heating element 112 is dynamically adjusted. By adjusting the temperature of the heating element and controlling the wavelength of infrared radiation, the temperature of the aerosol-forming substrate is dynamically adjusted, thereby achieving the target atomization effect.

[0062] According to Planck's law, the higher the temperature of the heating element 112, the shorter the wavelength of the generated infrared radiation, the weaker its transmittance, and the greater the energy emitted. Therefore, the wavelength of the infrared radiation can be controlled by adjusting the heating power of the heating element 112. When the wavelength range of the infrared radiation matches the absorption range of the aerosol-forming substrate, the heat radiation transfer effect can be increased. When the wavelength range of the infrared radiation deviates from the absorption range of the aerosol-forming substrate, the heat radiation transfer effect can be decreased, thereby adjusting the temperature of the aerosol-forming substrate.

[0063] Furthermore, step S3 includes, in the first stage, raising the temperature of the heating element from an initial temperature to a first temperature by controlling the heating power of the heating element based on an adjustment signal using a power control module, and in the second stage, gradually lowering the temperature of the heating element from the first temperature by controlling the heating power of the heating element based on an adjustment signal using a power control module. The first temperature is between 500°C and 1300°C, i.e., the first temperature may be 500°C or 1300°C, or any one value between 500°C and 1300°C, the duration of the first stage does not exceed 20 seconds, and the duration of the second stage does not exceed 360 seconds.

[0064] The first stage may be a preheating stage, and its maximum temperature may be 700°C to 1300°C, at which time the aerosol-forming substrate can be preheated by infrared heat in a very short time, and furthermore, the amount of smoke and mouthfeel of the aerosol for the first approximately three puffs when the user inhales can be ensured. Specifically, when energized, the heating element 112 can rapidly heat up from room temperature to around 1000°C, and the duration of this does not exceed 20 seconds. The second stage may be an inhalation stage after the aerosol-forming substrate has been preheated, when the aerosol is normally generated and inhaled by the user, and the duration of this stage does not exceed 360 seconds, during which the temperature of the heating element gradually decreases from around 1000°C. Naturally, as can be understood, in some other embodiments, the division of the heating process of the heating element 112 is not limited to two stages, and for example, the inhalation stage may be further divided into an inhalation mid-stage and an inhalation final stage, with corresponding heating temperatures set for each.

[0065] Furthermore, this embodiment further includes step S4, in which a prompt to the user to inhale is given within a first predetermined range after the first stage is completed, and heating is stopped within a second predetermined range after the second stage is completed. Specifically, the user experience is enhanced by prompting the user to inhale within the first predetermined range after the preheating stage is completed, and the prompt to the user may be in the form of voice, vibration or flashing of an indicator lamp, so as to be understandable. Within the second predetermined range after the inhalation stage is completed, power supply to the heating element is stopped and the heating of the heating element is stopped. The first and second predetermined ranges are determined according to the temperature control needs and can be set between 1 and 3 seconds.

[0066] Furthermore, this embodiment further includes step S5, which determines whether the temperature drop of the temperature signal exceeds a threshold within a predetermined time range, and if YES, increases the recorded number of inhalations by 1, and if NO, does not change the recorded number of inhalations. When a user inhales, the airflow formed by the inhalation passes through the heat-generating structure (i.e., the airflow passes through the temperature measuring unit), causing the temperature of the temperature measuring unit 20 to drop suddenly and uncontrollably. When the aerosol generator is started, if the recorded number of inhalations is 0, and the temperature signal drops uncontrollably within a predetermined time range t, and the drop is greater than a threshold, it is determined that an inhalation operation has been performed, and the recorded number of inhalations is increased by 1. The value of t is specifically determined by analyzing test data or historical data related to the user's inhalation.

[0067] By implementing the temperature control method applied to the aerosol generator disclosed in the embodiments of the present invention, the temperature of the heating element can be controlled by detecting the temperature of the housing, thereby adjusting the temperature of the aerosol-forming substrate to stabilize within a target range. This prevents the substrate temperature from being too high, causing scorching or carbonization, and the substrate temperature from being too low, resulting in insufficient atomization. This improves the stability of atomization of the aerosol-forming substrate, enhances mouthfeel, and improves the user experience. Furthermore, the method further includes a suction detection function.

[0068] As should be understood, the above embodiments represent only preferred embodiments of the present invention, and while their descriptions are more specific and detailed, they are not intended to limit the scope of the invention. It should be noted that those skilled in the art can freely combine the above technical features without departing from the concept of the invention, and can make various modifications and improvements, all of which fall within the scope of the invention. Accordingly, equivalent modifications and changes made based on the claims of the invention should all fall within the scope of the claims of the invention.

Claims

1. A temperature control method applied to an aerosol generator, The aerosol generator comprises a heating element and a housing, the heating element is used to generate infrared radiation to heat an aerosol-forming substrate by electric heating, the heating element and the housing are installed at least partially separated, the housing transmits the infrared radiation, and the temperature control method is The steps include acquiring a temperature signal from the housing, The steps include generating an adjustment signal using a preset algorithm based on the temperature signal and the target temperature, A temperature control method applied to an aerosol generator, characterized by comprising the step of adjusting the temperature of the heating element by controlling the heating power of the heating element based on the adjustment signal.

2. Adjusting the temperature of the heating element by controlling the heating power of the heating element based on the adjustment signal is, In the first stage, the heating power of the heating element is controlled based on the adjustment signal, and the temperature of the heating element is raised from the initial temperature to a first temperature. A temperature control method applicable to the aerosol generator according to claim 1, characterized in that, in the second stage, the heating power of the heating element is controlled based on the adjustment signal to gradually lower the temperature of the heating element from the first temperature.

3. A temperature control method applicable to the aerosol generator according to claim 2, characterized in that the first temperature is between 500°C and 1300°C.

4. A temperature control method applicable to an aerosol generator according to claim 2, characterized in that, within a first predetermined range after the first stage is completed, a prompt is made to the user to inhale, and heating is stopped within a second predetermined range after the second stage is completed.

5. A temperature control method applicable to an aerosol generator according to claim 2, characterized in that the duration of the first stage does not exceed 20 seconds, and the duration of the second stage does not exceed 360 seconds.

6. A temperature control method applicable to an aerosol generator according to claim 1, further comprising determining whether the temperature drop of the temperature signal exceeds a threshold within a predetermined time range, increasing the recorded number of inhalations by 1 if YES, and not changing the recorded number of inhalations if NO.

7. A temperature control system applied to an aerosol generator, Applicable to an aerosol generator, the aerosol generator comprises a heating element and a housing, the heating element is used to generate infrared radiation to heat an aerosol-forming substrate by electric heating, the heating element and the housing wall are installed at least partially separated, and the housing transmits the infrared radiation. The temperature control system comprises a temperature measurement unit, a temperature measurement module, a control signal generation module, and a power control module. The temperature measuring unit is installed on the inner or outer wall of the housing and is used to detect the temperature of the housing. The temperature measurement module is used to obtain a temperature signal for the housing by monitoring the temperature of the temperature measurement unit in real time. The adjustment signal generation module is used to generate an adjustment signal using a preset algorithm based on the temperature signal and the target temperature. A temperature control system applied to an aerosol generator, characterized in that the power control module is used to adjust the temperature of the heating element by controlling the heating power of the heating element based on the adjustment signal.

8. The power control module further, In the first stage, the heating power of the heating element is controlled based on the adjustment signal, and the temperature of the heating element is raised from the initial temperature to a first temperature. A temperature control system applied to an aerosol generator according to claim 7, characterized in that, in the second stage, it is used to control the heating power of the heating element based on the adjustment signal and to gradually lower the temperature of the heating element from the first temperature.

9. The first temperature is between 500°C and 1300°C. A temperature control system applicable to an aerosol generator according to claim 8, characterized in that the duration of the first stage does not exceed 20 seconds, and the duration of the second stage does not exceed 360 seconds.

10. The temperature measuring unit includes a first temperature sensor or a second temperature sensor. The first temperature sensor includes a thin-film temperature sensor or a thermistor. The temperature control system applied to the aerosol generator according to claim 7, characterized in that the second temperature sensor includes a thermocouple.

11. The first temperature sensor is connected in series with the first resistor and the temperature measuring switch. The first temperature sensor is used to detect the temperature of the housing. A temperature control system applied to an aerosol generator according to claim 10, characterized in that the temperature measuring switch is used to adjust the power supplied to the first temperature sensor by being turned on or off based on an input drive signal.

12. The second temperature sensor is connected to the temperature measurement module, The second temperature sensor is used to generate a detection signal based on the temperature of the housing. The temperature control system applied to the aerosol generator according to claim 10, characterized in that the temperature measurement module is used to generate and output the temperature signal based on the detection signal.

13. The power control module includes a second resistor, a third resistor, an NMOS transistor, and a PMOS transistor. The gate of the NMOS transistor is connected to the adjustment signal generation module, receives the adjustment signal, and is grounded via the second resistor, and the source of the NMOS transistor is grounded. The gate of the PMOS transistor is connected to the drain of the NMOS transistor, the drain of the PMOS transistor is connected to the input voltage, and the source of the PMOS transistor is connected to the heating element, thereby adjusting the heating power of the heating element based on the adjustment signal. The temperature control system applied to the aerosol generator according to claim 7, characterized in that the third resistor is connected between the drain and gate of the PMOS transistor.

14. A temperature control system applicable to an aerosol generator according to claim 7, characterized in that the heating element is located within the housing and comprises a heating substrate and an infrared radiation layer covering the outside of the heating substrate, and is used to excite the infrared radiation layer after energization to generate infrared radiation, and at least a portion of the housing is used to insert an aerosol-forming substrate.

15. The temperature measuring unit includes a first temperature sensor or a second temperature sensor. The first temperature sensor includes a thin-film temperature sensor or a thermistor and is installed on the outer wall of the housing. The temperature control system applied to the aerosol generator according to claim 14, characterized in that the second temperature sensor includes a thermocouple and is installed on the inner wall of the housing.

16. A temperature control system applicable to the aerosol generator according to claim 7, characterized in that the heating element is installed at intervals around the outer circumference of the housing, the inside of the housing is hollow, and a second containment chamber for containing an aerosol-forming substrate is formed therein.

17. The housing includes a first tubular body and a second tubular body fitted onto the outer circumference of the first tubular body. A gap is provided between the first pipe and the second pipe, and the gap forms a first housing chamber for housing the heating element. The heating element is provided on the outer circumference of the first tube and is installed at a distance from the outer wall of the first tube, and a second containment chamber for heating the aerosol-forming substrate is formed inside the first tube. The temperature control system applied to the aerosol generator according to claim 7, characterized in that the heating element includes a heating substrate and an infrared radiation layer covering the outside of the heating substrate, and is used to excite the infrared radiation layer after energization to generate infrared radiation.

18. The temperature measuring unit includes a first temperature sensor or a second temperature sensor. The first temperature sensor includes a thin-film temperature sensor or a thermistor and is installed on the inner wall of the first tube. A temperature control system applicable to the aerosol generator according to claim 17, characterized in that the second temperature sensor includes a thermocouple and is installed on the outer wall of the first tube.

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