Aerosol generating device, aerosol generating system and control method of aerosol generating system

Abstract

The invention relates to the technical field of heat-not-burn aerosol generation, in particular to an aerosol generating device and an aerosol generating system.The aerosol generating device comprises a shell, a control unit, a power source, a heating body and a heating cavity, and the control unit can control a first heating unit and a second heating unit to convert electric energy of the power source into heat energy and emit heat; and / or the first heating unit or the second heating unit can be controlled to convert the electric energy of the power supply into heat energy and heat; the structure of the heating body enables the aerosol generating device to independently regulate and control the first heating unit and the second heating unit through the control unit when the aerosol generating device is in a temperature rise stage and a constant temperature stage, so that the problem that the current of a battery is too high in a short time when the current passing through a single resistor in a traditional aerosol generating device is very large is avoided; when the temperature is serious, the overheating condition occurs, so that the use safety is greatly improved; the control method is high in current output precision at the constant temperature stage, the power supply is more stable and safer, and the structure is prevented from being overheated.

Description

Technical Field

[0001] This patent relates to the technical field of heat-not-burn aerosol generation, and specifically to an aerosol generating device and an aerosol generating system and a control method thereof. Background Art

[0002] Tobacco products (e.g., cigarettes, cigars, etc.) burn tobacco to produce tobacco smoke during use. Traditional cigarettes are ignited by an open flame and then burned to produce tobacco smoke. During the high temperature and cracking process, tobacco releases thousands of harmful compounds, including volatile compounds in the gas and semi-volatile and non-volatile compounds in the particles, such as carbon monoxide, phenols, aldehydes, nicotine (nicotine), and tar. Heat-not-burn (HTB) smoking devices can effectively reduce the production of these harmful compounds and are healthier. Therefore, people are trying to replace these tobacco-burning products by creating products that release compounds without combustion.

[0003] Heat-not-burn devices release compounds by heating rather than burning materials. Regular tobacco shreds are used as a base, along with atomizers and flavorings to create a heat-not-burn tobacco product. This heat-not-burn tobacco is placed in a heat-not-burn device and heated to a temperature sufficient to form smoke but not to cause combustion, producing a similar effect to cigarettes. The heating material in a heat-not-burn device can be tobacco or other non-tobacco products, which may or may not contain nicotine.

[0004] The heating element is the core of a heat-not-burn device and serves as the heat source for heating the tobacco. Currently, existing technologies typically utilize a single resistor as the heating element. When a voltage is applied to the resistor, a current flows through the heating element according to Ohm's law, generating heat according to Joule's law. This heat is then used to heat the tobacco, producing smoke for the user to inhale. The temperature at which the tobacco is heated is a factor that requires precise control. The optimal temperature prevents overheating or underheating, ensuring that the smoke is inhalable.

[0005] However, in the initial stage of tobacco heating, the temperature of the heating element needs to be quickly increased. For traditional heating elements, the common practice is to reduce the resistance of the heating element so that the current flowing through it is higher at the same voltage, and the power is increased. During the constant temperature stage, when pulse voltage is used, the current of a single pulse may be too large. These methods can certainly achieve a relatively rapid temperature increase, but because the current passing through a single resistor is very large, the accuracy of current detection caused by the excessive current will be reduced, resulting in deviations in the temperature control results. At the same time, the battery current is too high in a short period of time, and in severe cases, overheating may occur, causing danger.

[0006] Therefore, there is an urgent need for a heating body that can be controlled individually to meet the heat requirements of the tobacco material at different heating stages and to improve the safety of the tobacco material during the heating process. Summary of the Invention

[0007] In order to overcome the defects of the prior art in which rapid temperature rise leads to reduced current detection accuracy and battery overheating during the temperature rise process, improve the safety of the heating process of the heat-not-burn device, and meet the temperature control and heat requirements of the heat-not-burn device in different heating stages, this patent provides the following technical solutions:

[0008] A first aspect: An aerosol generating device is provided, which includes: a shell, a control unit, a power supply, a heating body and a heating chamber, wherein the control unit, power supply, heating body and heating chamber are arranged in the shell; the heating chamber is used to accommodate the aerosol generating product to be heated; the heating body includes a first heating unit and a second heating unit, and during use, the first heating unit and the second heating unit convert the electrical energy of the power supply into thermal energy and generate heat under the control of the control unit; the control unit can control the first heating unit and the second heating unit to convert the electrical energy of the power supply into thermal energy and generate heat; and / or can control the first heating unit or the second heating unit to convert the electrical energy of the power supply into thermal energy and generate heat.

[0009] Furthermore, the shape of the heating chamber is selected from one or more of cylindrical, truncated cone and conical; the material of the heating body base is selected from one or more of alumina ceramics, zirconia ceramics, silicon nitride ceramics, silicon carbide ceramics and yttrium oxide ceramics.

[0010] Furthermore, the control unit includes a first control unit and a second control unit, the first control unit controls the voltage, current and temperature of the first heating unit, and the second control unit controls the voltage, current and temperature of the second heating unit.

[0011] Furthermore, the material of the first heating unit and the second heating unit is one or more materials selected from metal materials, metal alloys, graphite, carbon, conductive ceramics and composite materials of metal materials.

[0012] Furthermore, the control unit is connected to the first heating unit and the second heating unit by wire connection or common terminal connection; the common terminal connection is connected by accessing a common reference level.

[0013] Furthermore, the heating body includes a head, a middle section and a tail section, and the middle section is provided with a first heating unit and a second heating unit.

[0014] In a second aspect, an aerosol generating system is provided. The aerosol generating system includes the above-mentioned aerosol generating device and further includes an aerosol generating article.

[0015] In a third aspect, a control method for an aerosol generating system is provided. The control method is used for the above-mentioned aerosol generating system, including: S1: after the aerosol generating product is inserted into the aerosol generating device, the aerosol generating system starts the heating stage; S2: after the heating time, the aerosol generating system enters the constant temperature stage from the preheating stage.

[0016] Further, when the aerosol generating system is in the constant temperature stage, the voltage of the first heating unit is at a high level and the voltage of the second heating unit is at a low level; and / or the voltage of the first heating unit is at a low level and the voltage of the second heating unit is at a high level.

[0017] Furthermore, the heating time is 16-21s, 21-26s or 26-31s; in the heating stage, the first heating unit and the second heating unit are heated simultaneously; in the constant temperature stage, the first heating unit and the second heating unit are pulse-width modulated by the signal voltage.

[0018] This patent has the following beneficial effects:

[0019] 1. This patent relates to the field of heat-not-burn aerosol generation technology, specifically to an aerosol generating device, comprising: a housing, a control unit, a power supply, a heating element, and a heating chamber. The control unit is capable of controlling a first heating element and a second heating element to convert electrical energy from the power supply into thermal energy and generate heat; and / or is capable of controlling the first heating element or the second heating element to convert electrical energy from the power supply into thermal energy and generate heat. The heating elements of this structure are controlled by the control unit without interfering with each other during use, and use two independent voltage, current, and temperature detection and control systems to form a combined heating element.

[0020] 2. The structure of the heating element in this patent enables the first heating unit and the second heating unit to be independently controlled by the control unit when the aerosol generating device is in the heating stage and the constant temperature stage. This avoids the problem that when a single resistor in a traditional aerosol generating device passes a large current, the current detection accuracy is reduced due to the excessive current, resulting in deviations in the temperature control results. At the same time, the battery current is too high in a short period of time, which may cause overheating in serious cases and cause dangerous problems. This greatly improves the safety of use.

[0021] 3. This patent also provides an aerosol generating system including an aerosol generating device and proposes a control method with high current output accuracy, more stable and safe power supply, and avoidance of structural overheating in the constant temperature stage. The first heating unit and the second heating unit use pulse width modulation signal voltage to make the levels of the first heating unit and the second heating unit in opposite states at the same time point, and the sum of the duty cycle values of the two is less than or equal to 100%, thereby avoiding power supply overheating and improving the control accuracy of the control unit.

[0022] In the following embodiments, an "aerosol generating article" may refer to any smokeable article or any article that provides a smoking experience, regardless of whether it is based on tobacco, a tobacco derivative, expanded tobacco, reconstituted tobacco, or a tobacco substitute. For example, an aerosol generating article may include aerosol generating articles such as cigarettes, cigars, and cigarillos. As another example, an aerosol generating article may include a combustion aerosol generating article and an aerosol generating article.

[0023] Preferably, the aerosol-forming substrate is a solid aerosol-forming substrate. The aerosol-forming substrate may comprise both solid and liquid components. Preferably, the aerosol-forming substrate comprises nicotine. In some preferred embodiments, the aerosol-forming substrate comprises tobacco.

[0024] The aerosol-generating product preferably uses a solid matrix and may include one or more of powder, particles, shredded strips, ribbons or flakes of one or more of herb leaves, tobacco leaves, homogenized tobacco, and expanded tobacco; alternatively, the solid matrix may contain additional tobacco or non-tobacco volatile flavor compounds to be released when the matrix is heated.

[0025] Optionally, the solid aerosol-forming substrate may comprise tobacco volatile aroma compounds or non-tobacco volatile aroma compounds that are released upon heating the solid aerosol-forming substrate. The solid aerosol-forming substrate may also comprise one or more capsules comprising, for example, additional tobacco volatile aroma compounds or non-tobacco volatile aroma compounds, and such capsules may melt during heating of the solid aerosol-forming substrate.

[0026] Optionally, the solid aerosol-forming substrate may be disposed on or embedded in a thermally stable carrier. The carrier may be in the form of a powder, granules, pellets, chips, strips, bars, or sheets. The solid aerosol-forming substrate may be disposed on the surface of the carrier in the form of, for example, a sheet, foam, gel, or slurry. The solid aerosol-forming substrate may be placed over the entire surface of the carrier, or alternatively, may be arranged in a pattern to provide uneven flavor delivery during use.

[0027] The aerosol-forming substrate may be in the form of a plug comprising the aerosol-forming material circumscribed by paper or other wrapping material.Where the aerosol-forming substrate is in the form of a plug, the entire plug including any wrapping paper is considered to be the aerosol-forming substrate.

[0028] Preferably, the aerosol-forming substrate comprises a plug comprising a gathered sheet of homogenised tobacco material or other aerosol-forming material surrounded by a wrapper.

[0029] In this patent, aerosol former is used to describe any suitable known compound or mixture of compounds which, in use, promotes the formation of an aerosol and which is substantially resistant to thermal degradation at the operating temperature of the aerosol-generating article.

[0030] Suitable aerosol formers are known in the art and include, but are not limited to, polyols such as propylene glycol, triethylene glycol, 1,3-butylene glycol, and glycerol; esters of polyols such as glycerol monoacetate, glycerol diacetate, or glycerol triacetate; and aliphatic esters of mono-, di-, or polycarboxylic acids such as dimethyl dodecanedioate and dimethyl tetradecanedioate. Preferred aerosol formers are polyols or mixtures thereof such as propylene glycol, triethylene glycol, 1,3-butylene glycol, and most preferably glycerol.

[0031] The aerosol-forming substrate may comprise a single aerosol-forming agent. Alternatively, the aerosol-forming substrate may comprise a combination of two or more aerosol-forming agents.

[0032] Preferably, the aerosol-forming substrate has an aerosol-forming agent content of greater than 5% by dry weight. More preferably, the aerosol-forming substrate may have an aerosol-forming agent content of between about 5% and about 30% by dry weight. In one embodiment, the aerosol-forming substrate has an aerosol-forming agent content of about 20% by dry weight.

[0033] Aerosol-forming articles can have the appearance of traditional cigarettes. Cigarette articles, such as cigarettes, and their specifications are generally named based on the length of the cigarette, as described below. "Standard" generally refers to cigarettes with a length ranging from 68 mm to 75 mm, such as approximately 68 mm to approximately 72 mm. "Short" or "Mini" refers to cigarettes with a length of less than 68 mm. "Extra" generally refers to cigarettes with a length ranging from 75 mm to 91 mm, such as approximately 79 mm to approximately 88 mm. "Long" or "Extra" generally refers to cigarettes with a length ranging from 91 mm to 105 mm, such as approximately 94 mm to approximately 101 mm. "Extra" generally refers to cigarettes with a length ranging from approximately 110 mm to approximately 121 mm. Furthermore, cigarette articles are named based on the circumference of the cigarette, as described below. The term "standard" refers to a cigarette with an outer circumference of approximately 23mm to 25mm, "coarse" refers to a cigarette with an outer circumference of 25mm or more, "thin" refers to a cigarette with an outer circumference of approximately 22mm to 23mm, "slim" refers to a cigarette with an outer circumference of approximately 19mm to 22mm, "superfine" refers to a cigarette with an outer circumference of approximately 16mm to 19mm, and "fine" refers to a cigarette with a circumference of approximately 16mm or less. Thus, oversized and superfine cigarettes have, for example, a length of approximately 83mm and an outer circumference of approximately 17mm. Standard and oversized cigarettes, i.e., cigarettes with a length of 75mm to 91mm and an outer circumference of 23mm to 25mm, are popular with many consumers. Cigarettes of various sizes can also be manufactured with filters of different lengths. Typically, short filters are used for cigarettes with both short length and short circumference. Typically, filter lengths range from 15 mm for "short" and "standard" cigarettes to 30 mm for "extra long" and "super slim" cigarettes. The tipping paper in the longitudinal direction of the filter-tipped cigarette is longer than the filter, for example, 3 to 10 mm.

[0034] Preferably, the aerosol-forming article comprises an aerosol-forming substrate, a support element, an aerosol-cooling element, and a mouthpiece. Preferably, the aerosol-forming substrate, the support element, the aerosol-cooling element, and the mouthpiece are substantially cylindrical and have substantially comparable outer diameters. For example, they have an outer diameter of at least 5 mm. Preferably, they have an outer diameter of between about 5 mm and about 12 mm, such as between about 5 mm and about 10 mm, or between about 6 mm and about 8 mm. In a preferred embodiment, they have an outer diameter of 7.2 mm + / - 10%.

[0035] In the following embodiments, "aerosol generating material" may refer to a substance that generates smoke and / or aerosol or is used for smoking. For example, the aerosol generating substrate may include a tobacco substance. For example, the aerosol generating substrate may include tobacco leaves, tobacco stems, or substances processed therefrom. As a more specific example, the aerosol generating substrate may include pulverized tobacco leaves, pulverized reconstituted tobacco, expanded pipe tobacco, expanded stem cuts, and reconstituted tobacco leaves. However, the present disclosure is not limited thereto.

[0036] Preferably, the aerosol generating device is a smoking device which interacts with the aerosol-generating substrate of the aerosol-generating article to generate an aerosol which is directly inhalable into the user's lungs through the user's mouth.The aerosol generating device may be a holder for a smoking article.

[0037] The power source can be any suitable power source, such as a DC voltage source, such as a battery. In one embodiment, the power source is a lithium-ion battery. Alternatively, the power source can be a nickel metal hydride battery, a nickel cadmium battery, or a lithium-based battery, such as lithium cobalt, lithium iron phosphate, lithium titanate, or a lithium polymer battery.

[0038] The control element may be a simple switch. Alternatively, the control element may be an electrical circuit and may include one or more microprocessors or microcontrollers.

[0039] The aerosol generating system may include an aerosol generating device and one or more aerosol generating articles, wherein the aerosol generating device is equipped with a corresponding number of heating chambers to accommodate the aerosol generating articles.

[0040] Tobacco sheets can be made by roll-forming, slurry-making, and paper-making processes known in the art to form aerosol-forming substrates, including homogenized tobacco sheets for use in aerosol-generating articles.

[0041] In this patent, sheet refers to a laminar element having a width and length that are substantially greater than its thickness.

[0042] In this patent, the aerosol-forming substrate comprises a gathered textured sheet of homogenised tobacco material.

[0043] In this patent, textured sheet means a sheet that has been crimped, embossed, stamped, perforated or otherwise deformed.The aerosol-forming substrate may comprise a gathered textured sheet of homogenised tobacco material comprising a plurality of spaced apart indentations, protrusions, perforations or a combination thereof.

[0044] Preferably, the aerosol-forming substrate comprises a gathered, crimped sheet of homogenised tobacco material.The use of a textured sheet of homogenised tobacco material may advantageously facilitate gathering of the sheet of homogenised tobacco material to form the aerosol-forming substrate.

[0045] In this patent, a curled sheet is a sheet having a plurality of substantially parallel ridges or corrugations. Preferably, when the aerosol-generating article is assembled, the substantially parallel ridges or corrugations extend along or parallel to the longitudinal axis of the aerosol-generating article. This advantageously facilitates gathering of the curled sheet of homogenised tobacco material to form the aerosol-forming substrate.

[0046] However, it will be appreciated that the crimped sheet of homogenised tobacco material for inclusion in an aerosol-generating article may alternatively or additionally have a plurality of substantially parallel ridges or corrugations which are arranged at acute or obtuse angles to the longitudinal axis of the aerosol-generating article when the aerosol-generating article has been assembled.

[0047] GND is short for ground, also known as a common reference level. GND, as seen on circuit diagrams and circuit boards, is an essential component of electronic circuit boards. It serves two primary functions: first, it provides a return path for current, ensuring proper circuit operation; and second, it eliminates or shields electromagnetic interference, ensuring stable circuit operation. When electronic components are operating, current flows from the positive terminal of the power supply and, after passing through the component, needs to return to the negative terminal of the power supply. GND provides this return path. Furthermore, various interference signals may exist within the circuit, potentially affecting its proper operation. By connecting the common terminals of electronic components, GND forms an equipotential surface, effectively shielding these interference signals and ensuring circuit stability and reliability.

[0048] The single-point grounding principle is a common GND design method. It requires that only one physical point in the entire circuit system be defined as the ground reference point, and all other points requiring grounding are directly connected to this point. This effectively prevents interference signals generated by ground loops from affecting the circuit. Furthermore, depending on the specific needs and application scenarios of the circuit, engineers may also design different types of GNDs, such as analog ground AGND, digital ground DGND, and power ground PGND, to meet different circuit requirements.

[0049] The core of PWM control is to simulate the characteristics of analog circuits by using binary signals (high and low levels) and adjusting the proportion of time these signals are high (i.e., the duty cycle). In aerosol generating devices, PWM control is used to adjust the power supplied to the atomizer to control the temperature of the heater.

[0050] When the user takes a puff, the controller uses PWM control at a high duty cycle to supply power from the battery to the atomizer's heater, rapidly heating it to the target temperature range and generating aerosol. During the non-puffing period between puffs, the controller uses PWM control at a lower duty cycle to maintain the heater temperature within a predetermined range slightly below the target temperature range. This allows the heater to quickly reach the target temperature when the next puff is taken, ensuring a consistent amount of aerosol is generated with each puff.

[0051] PCBA is the abbreviation of Printed Circuit Board Assembly. It means that the blank printed circuit board (PCB) goes through the entire process of surface mount technology (SMT) or plug-in technology (DIP) to install electronic components (such as resistors, capacitors, inductors, chips, etc.) on the PCB, and then goes through a series of processes such as soldering and testing to finally form an electronic assembly with specific functions, which is referred to as PCBA.

[0052] A printed circuit board, often abbreviated PCB (Printed Circuit Board), is a crucial electronic component that supports and connects electronic components. Because it's manufactured using electronic printing technology, it's called a "printed" circuit board. Before the advent of printed circuit boards, electronic components relied on direct wires to form complete circuits.

[0053] SMT (Surface Mounted Technology) is a surface mounting technology that primarily utilizes placement machines to attach tiny components to PCBs. The production process includes PCB positioning, solder paste printing, placement by the placement machine, reflow oven processing, and final inspection. With technological advancements, SMT can also accommodate the placement of larger components, such as larger mechanical parts on motherboards. SMT assembly is highly sensitive to positioning and component size, and solder paste and printing quality also play a crucial role.

[0054] DIP (Dip In Place) stands for "plug-in-place," meaning components are inserted onto a PCB. This method is used when the components are large and unsuitable for surface-mount assembly, or when the manufacturer's production process cannot utilize surface-mount technology. There are two implementation methods: manual and robotic. The main production process includes adhesive backing (to prevent tin plating in undesirable areas), insertion, inspection, wave soldering, soldering (to remove contaminants left during the soldering process), and final inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the technical solutions of the embodiments of this patent, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of this patent and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0056] Figure 1 A diagram showing the positional relationship of the components of the aerosol generating device of this patent;

[0057] Figure 2 This is a structural diagram of the heating body in the first embodiment of this patent;

[0058] Figure 3 This is a graph showing the voltage variation over time of the first heating unit and the second heating unit during the heating stage of this patent;

[0059] Figure 4a This is a graph showing the voltage variation of the first heating unit over time during the constant temperature stage of this patent;

[0060] Figure 4b This is a graph showing the voltage variation of the second heating unit over time during the constant temperature stage of this patent;

[0061] Figure 5 This is a structural diagram of the heating body in the second embodiment of this patent.

[0062] The description of the accompanying drawings is as follows:

[0063] 100: heating element;

[0064] 110: head;

[0065] 120: middle section;

[0066] 121: first heating unit;

[0067] 122: second heating unit;

[0068] 130: tail;

[0069] 210: first conductor;

[0070] 220: second wire;

[0071] 230: Common terminal wire;

[0072] 240: third conductor;

[0073] 250: The fourth wire. DETAILED DESCRIPTION

[0074] The detailed features and advantages of this patent are described in detail below in the specific implementation method. The content is sufficient to enable any technical personnel in this field to understand the technical content of this patent and implement it accordingly. Based on the description, claims and drawings disclosed in this specification, technical personnel in this field can easily understand the relevant purposes and advantages of this patent.

[0075] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0076] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be an element centered thereon. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an element centered thereon at the same time. The orientation or positional relationship indicated by the terms "upper", "lower", "inner", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or is the orientation or positional relationship in which the product is usually placed when in use. It is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. The terms "first", "second", etc. are only used to distinguish descriptions and cannot be understood as indicating or implying relative importance.

[0077] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this patent pertains. The terms used herein in the specification of this patent are for the purpose of describing specific embodiments only and are not intended to limit this patent. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0078] In order to make the purpose, technical solutions and advantages of this patent clearer, the implementation methods of this patent will be further described in detail below with reference to the accompanying drawings.

[0079] Example 1

[0080] Please refer to Figure 1 An aerosol generating device includes a shell, a control unit, a power supply, a heating body 100 and a heating chamber, wherein the control unit, the power supply, the heating body 100 and the heating chamber are arranged in the shell, the power supply is used to provide energy to the heating body 100, and the control unit is used to control the power supply to provide energy to the heating body 100.

[0081] Specifically, the interior of the housing is a hollow structure, thereby forming an assembly space for necessary functional components such as electronic devices and heating devices.

[0082] Specifically, a light display screen is provided on the outer wall of the shell, and instructions are output by the control unit and fed back to the light display screen in real time.

[0083] Specifically, the power source is a lithium battery.

[0084] Specifically, the control unit and the power supply are arranged outside the heating chamber.

[0085] Specifically, the heating chamber has a cylindrical structure and is used to accommodate the aerosol-generating product to be heated. A heating body 100 is provided at the bottom of the heating chamber to generate heat to heat the aerosol-generating product.

[0086] Specifically, in this embodiment, the shape of the heating chamber is cylindrical, and the diameter of the heating chamber is slightly larger than or equal to the diameter of the aerosol generating article.

[0087] Specifically, the diameter of the aerosol-generating article is between 5.45 and 7.7 mm.

[0088] Specifically, before the aerosol-generating device heats the aerosol-generating article, the aerosol-generating article enters the heating chamber and the heated body 100 is inserted into the interior of the aerosol-generating article.

[0089] Specifically, the heating body 100 includes a head 110, a middle section 120 and a tail 130. The shape of the heating body 100 is needle-shaped. The head 110 of the heating body 100 is a sharp needle to facilitate insertion into the aerosol generating product. The tail 130 of the heating body 100 is connected to a wire for connecting to a power supply.

[0090] Specifically, the material of the head 110 and the tail 130 of the heating body 100 can be one or more of alumina ceramics, zirconia ceramics, silicon nitride ceramics, silicon carbide ceramics and yttrium oxide ceramics, but this patent is not limited thereto.

[0091] Specifically, the middle section 120 of the heating body 100 includes a first heating unit 121 and a second heating unit 122. In this embodiment, the first heating unit 121 is arranged at the upper part of the heating chamber, and the second heating unit 122 is arranged at the lower part of the heating chamber.

[0092] Specifically, in use, the first heating unit 121 and the second heating unit 122 convert the electric energy of the power supply into thermal energy and generate heat under the control of the control unit.

[0093] Specifically, the material of the first heating unit 121 and the second heating unit 122 can be selected from one or more of metal materials, metal alloys, graphite, carbon, conductive ceramics, and composite materials of metal materials. Suitable metal or alloy materials include silver, copper, gold, aluminum, zinc, nickel, calcium, tungsten, lithium, iron, cobalt, zirconium, titanium, nickel alloys, cobalt alloys, zirconium alloys, titanium alloys, nickel-chromium alloys, nickel-iron alloys, iron-chromium alloys, iron-chromium-aluminum alloys, iron-manganese-aluminum-based alloys, or stainless steel, but this patent is not limited thereto.

[0094] Specifically, the control unit can control the first heating unit 121 and the second heating unit 122 to convert the electrical energy of the power supply into thermal energy and generate heat; and / or the control unit can control the first heating unit 121 or the second heating unit 122 to convert the electrical energy of the power supply into thermal energy and generate heat.

[0095] Specifically, the control unit includes a PCBA circuit board, which contains a control circuit with a microelectronic controller as the core. It can receive instructions through buttons, transmit signals to the light display screen to display the status, and adjust the current, voltage and temperature at both ends of the first heating unit 121 and the second heating unit 122.

[0096] Specifically, the control unit includes a first control unit and a second control unit. The first control unit controls the voltage, current and temperature of the first heating unit 121 , and the second control unit controls the voltage, current and temperature of the second heating unit 122 .

[0097] Specifically, the first heating unit 121 and the second heating unit 122 are heated by resistance.

[0098] For details, please refer to Figure 2 The first heating unit 121 leads out a first wire 210 from the tail 130 of the heating body 100, and the second heating unit 122 leads out a second wire 220 from the tail 130 of the heating body 100. The control end of the first wire 210 and the control end of the second wire 220 are independent control ends.

[0099] In particular, the unleaded wire ends of the first heating unit 121 and the second heating unit 122 are connected to form a common end wire 230, and a common reference level (GND) is connected to the circuit of the common end wire 230. The common reference level can control the voltage and current of the first wire 210 and the second wire 220 respectively, thereby achieving the technical effect of independently controlling the first heating unit 121 and the second heating unit 122 without interfering with each other.

[0100] An aerosol generating system comprises the above-mentioned aerosol generating device and an aerosol generating product.

[0101] Specifically, the aerosol generating product includes a filter section, a cooling section, a support section and a tobacco section. The tobacco section is arranged at the distal lip end of the aerosol generating product. After the tobacco section enters the heating chamber, it is inserted by the heating body 100 and then heated.

[0102] A control method for an aerosol generating system, which is used for the above-mentioned aerosol generating system, comprises two steps:

[0103] S1: After the aerosol-generating article is inserted into the aerosol-generating device, the aerosol-generating system starts the heating phase.

[0104] Specifically, the tobacco segment of the obtained aerosol-generating product is pushed radially toward the bottom of the heating chamber until the heating body 100 is completely inserted into the aerosol-generating product. After the aerosol-generating product is inserted into the aerosol-generating device, the control unit controls the aerosol-generating device to enter a heating stage.

[0105] For details, please refer to Figure 3 After entering the heating stage, the first control unit and the second control unit control the power supply to simultaneously apply a DC voltage to the first heating unit 121 and the second heating unit 122, so that the first heating unit 121 and the second heating unit 122 pass current at the same time and generate heat, thereby achieving the purpose of quickly heating the aerosol generating product and ensuring the safety of the heating process.

[0106] S2: After the heating time, the aerosol generating system enters the constant temperature stage from the heating stage.

[0107] Specifically, after the temperature rise stage, the aerosol generating product has generated an inhalable aerosol. At this time, it is only necessary to maintain the temperature at which the aerosol generating product generates the aerosol without increasing the temperature. Therefore, the aerosol generating system enters the constant temperature stage from the temperature rise stage.

[0108] Specifically, the first heating unit 121 and the second heating unit 122 use pulse width modulation (PWM) signal voltages so that the voltages at both ends of the first heating unit 121 and the voltages at both ends of the second heating unit 122 are staggered at the same time.

[0109] As you can understand, a PWM signal is a special digital signal whose duty cycle (i.e., the ratio of the high-level time to the cycle time) determines the signal's average power. By adjusting the PWM signal's duty cycle, the heater temperature can be precisely controlled, thereby ensuring the amount and quality of aerosol generated. Reducing the duty cycle during non-puffing periods reduces power consumption and improves battery efficiency. By maintaining the heater temperature within a predetermined range, a uniform aerosol volume is achieved with each puff, enhancing the user experience.

[0110] It is understood that the present application adopts PWM control mode, which has a simple circuit structure and is easy to implement and control. The input control voltage of the frequency source is controlled by the PWM signal, which realizes automatic and rapid adjustment of the signal frequency, thereby improving the efficiency and accuracy of frequency regulation.

[0111] Specifically, the PWM voltage waveform is characterized in that the voltage is divided into a high level and a low level. Within a cycle T, the high level and the low level each occupy a certain time within the cycle. The ratio of the time occupied by the high level within the cycle T is called the duty cycle, and the value ranges from 0% to 100%.

[0112] Specifically, the control unit applies a PWM voltage of the same frequency to the first heating unit 121 and the second heating unit 122 at the same time, and makes the sum of the duty cycle values of the voltage of the first heating unit 121 and the voltage of the second heating unit 122 less than or equal to 100%, and the voltage of the first heating unit 121 and the voltage of the second heating unit 122 are high and low levels respectively at the same time point.

[0113] For details, please refer to Figure 4a and Figure 4b When the first control unit controls the first heating unit 121 to be at a high level, the second control unit controls the second heating unit 122 to be at a low level; and when the first control unit controls the first heating unit 121 to be at a low level, the second control unit controls the second heating unit 122 to be at a high level.

[0114] Specifically, such a voltage setting enables the power supply to output current only to the first heating unit 121 or the second heating unit 122 at a time point, thereby avoiding danger caused by overheating of the power supply. At the same time, the heat generated by the aerosol generating system under this control method is constant and approximately equal to the heat generated by a single heating unit.

[0115] Example 2

[0116] The difference between this embodiment and the first embodiment lies in the connection method between the first heating unit 121 and the second heating unit 122 .

[0117] For details, please refer to Figure 5 The first heating unit 121 extends a first wire 210 and a third wire 240 from the rear end 130 of the heating element 100, while the second heating unit 122 extends a second wire 220 and a fourth wire 250 from the rear end 130 of the heating element 100. The first heating unit 121 and the second heating unit 122 are not physically connected, so the first control unit controlling the first heating unit 121 and the second control unit controlling the second heating unit 122 are two independently controlled components. Therefore, the power, voltage, current, and temperature output by the first heating unit 121 and the second heating unit 122 are only related to the corresponding first and second control units.

[0118] It should be understood that the term "and / or" as used herein simply describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A alone, A and B together, or B alone. A and B can be singular or plural. Furthermore, the character " / " as used herein generally indicates an "or" relationship between the associated objects, but it may also indicate an "and / or" relationship. For specific understanding, please refer to the context.

[0119] In the present invention, "at least one" means one or more, and "plurality" means two or more. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or plural.

[0120] It should be understood that in various embodiments of the present invention, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0121] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present invention.

[0122] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described equipment, devices and units can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0123] In the several embodiments provided by the present invention, it should be understood that the disclosed devices, apparatuses, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, and can be electrical, mechanical, or other forms.

[0124] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0125] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0126] The terms and expressions used herein are for descriptive purposes only, and this application is not intended to be limited to these terms and expressions. The use of these terms and expressions does not exclude any equivalent features of the features illustrated and described (or portions thereof), and it should be recognized that various modifications that may exist are also intended to be included within the scope of the claims. Other modifications, variations, and substitutions are also possible. Accordingly, the claims should be deemed to cover all such equivalents.

[0127] Similarly, it should be pointed out that although the present application has been described with reference to the current specific embodiments, ordinary technicians in this technical field should realize that the above embodiments are only used to illustrate the present application, and various equivalent changes or substitutions can be made without departing from the spirit of the invention. Therefore, as long as the changes and modifications to the above embodiments are within the scope of the essential spirit of the present application, they will fall within the scope of the claims of the present application.

Claims

1. An aerosol generating device, characterized in that The aerosol generating device comprises: a housing, a control unit, a power supply, a heating body and a heating chamber, wherein: The control unit, the power supply, the heating body and the heating chamber are arranged in the housing; The heating chamber is used to accommodate the aerosol-generating product to be heated; The heating body comprises a first heating unit and a second heating unit, and in use, the first heating unit and the second heating unit convert the electrical energy of the power supply into thermal energy and generate heat under the control of the control unit; The control unit can control the first heating unit and the second heating unit to convert the electrical energy of the power supply into thermal energy and generate heat; and / or can control the first heating unit or the second heating unit to convert the electrical energy of the power supply into thermal energy and generate heat.

2. The aerosol generating device according to claim 1, wherein The shape of the heating chamber is one or more selected from the group consisting of cylindrical, truncated cone and conical; The material of the heating body substrate is one or more selected from alumina ceramics, zirconia ceramics, silicon nitride ceramics, silicon carbide ceramics and yttrium oxide ceramics.

3. The aerosol generating device according to claim 1, wherein The control unit includes a first control unit and a second control unit. The first control unit controls the voltage, current and temperature of the first heating unit. The second control unit controls the voltage, current and temperature of the second heating unit.

4. The aerosol generating device according to claim 1, wherein The material of the first heating unit and the second heating unit is one or more selected from metal materials, metal alloys, graphite, carbon, conductive ceramics and composite materials of metal materials.

5. The aerosol generating device according to claim 1, wherein: The control unit is connected to the first heating unit and the second heating unit by wire connection or common terminal connection; The common terminal is connected by accessing a common reference level connection.

6. The aerosol generating device according to claim 1, wherein: The heating body includes a head, a middle section and a tail section, and the middle section is provided with the first heating unit and the second heating unit.

7. An aerosol generating system, characterized in that: The aerosol generating system comprises the aerosol generating device according to any one of claims 1 to 6, and the aerosol generating system further comprises an aerosol generating article.

8. A method for controlling an aerosol generating system, characterized in that: The control method for the aerosol generating system according to claim 7 comprises: S1: After the aerosol-generating article is inserted into the aerosol-generating device, the aerosol-generating system starts the heating stage; S2: After the heating time, the aerosol generating system enters the constant temperature stage from the preheating stage.

9. The control method according to claim 8, characterized in that: When the aerosol generating system is in a constant temperature stage, the voltage of the first heating unit is at a high level and the voltage of the second heating unit is at a low level; and / or the voltage of the first heating unit is at a low level and the voltage of the second heating unit is at a high level.

10. The control method according to claim 8, characterized in that: The heating time is 16-21s, 21-26s or 26-31s; In the heating stage, the first heating unit and the second heating unit are heated simultaneously; In the constant temperature stage, the first heating unit and the second heating unit are pulse-width modulated signal voltages.

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