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

Abstract

The invention relates to the field of heating non-combustion tobacco, and provides an aerosol generating device, in which a control unit, a power supply, a heating cavity and a heating assembly are arranged in a shell, the heating assembly comprises a first heating unit, the first heating unit comprises an induction coil, and the heating assembly further comprises a second heating unit, in use, the second heating unit can directly generate heat under the control of the control unit to heat the aerosol generating product so as to perform compensation heating; the invention further comprises an aerosol generating system and a control method of the aerosol generating system, according to the aerosol generating system, a control logic is provided, after the aerosol generating product is inserted into the aerosol generating device, the aerosol generating system starts a preheating stage, and the two heating sources work at the same time; after the preheating time, the aerosol generating system enters the heated stage from the preheating stage, and the peripheral heating element is closed or the heating temperature of the peripheral heating element is reduced.

Description

Technical Field

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

[0002] With the increasing attention paid to the issues of smoking and health, new tobacco products have gradually gained market favor. Among them, heat-not-burn tobacco products are the ones that are closest to traditional cigarettes in terms of smoking quality and smoking habits. Compared with traditional combustible cigarettes, since heat-not-burn cigarettes do not burn, the harmful components released are significantly reduced compared to traditional cigarettes. Under the condition of similar smoking quality, the product safety is significantly improved. Currently, the heating methods adopted by heat-not-burn tobacco products include resistance heating, electromagnetic induction heating, air heating, photon heating, chemical heating, carbon heating, etc. The vast majority of existing products adopt resistance heating.

[0003] Directly heating tobacco with an electrothermal element will cause uneven heating of the tobacco. The tobacco in the low-temperature area cannot be heated, resulting in waste; in the local high-temperature area, spontaneous combustion is likely to occur at the local high-temperature part during smoking, affecting the smoking experience. The principle of electromagnetic induction heating is that the alternating current generated by the induction heating power supply passes through the inductor (i.e., the coil) to generate an alternating magnetic field. A ferromagnetic object placed in the alternating magnetic field cuts the alternating magnetic force lines, thereby generating an alternating current (i.e., eddy current) inside the object. The eddy current makes the atoms inside the object move at high speed and randomly, and the atoms collide and rub against each other to generate heat energy, thus achieving the effect of heating the object.

[0004] Currently, the mainstream decentralized electromagnetic heating appliances in the market adopt the technical principle of electromagnetic induction heating. The induction coil is arranged in the heating appliance, and the susceptor is placed inside the tobacco section. An alternating magnetic field is provided by the induction coil to make the susceptor generate eddy current heat. Due to the thin thickness (≤0.1 mm) and small volume of the susceptor, its heat storage capacity is limited. When the preheating time is short, the heat of the cigarette stick is insufficient, and the smoke in the first two puffs is small and the content is insufficient; when the preheating time is long, the waiting time for consumers is long and the experience is poor; at the same time, only the contact area between the cigarette stick and the susceptor is carbonized, and the overall utilization rate still needs to be improved. Therefore, how to further improve the smoke quality in the first two puffs and at the same time improve the tobacco utilization rate on the basis of shortening the preheating time is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0005] In order to further improve the smoke quality in the first two puffs and at the same time improve the tobacco utilization rate on the basis of shortening the preheating time, this patent provides the following technical solutions:

[0006] First aspect: Provide an aerosol generating device, the aerosol generating device comprising: a housing, a control unit, a power source, a heating chamber and a heating component, wherein the control unit, the power source, the heating chamber and the heating component are arranged in the housing; the heating chamber is configured to accommodate the aerosol generating article to be heated with a length of 1 / 5 to 1 / 2, 1 / 2 to 4 / 5 or 4 / 5 to 1; the heating component includes a first heating unit, the first heating unit includes an induction coil, and in use, the induction coil generates a fluctuating electromagnetic field under the control of the control unit so as to transmit the electric energy of the power source to a susceptor in the aerosol generating article and make it heat up; the heating component further includes a second heating unit, and in use, the second heating unit can directly generate heat under the control of the control unit to heat the aerosol generating article.

[0007] Further, the induction coil is selected from one or more of a spiral coil, a flat planar coil, a pancake coil, and a bent planar coil.

[0008] Further, the second heating unit is made of a non-ferromagnetic material, and the second heating unit is selected from one or more of ceramics, austenite, copper, aluminum, lead, tin, and zinc.

[0009] Further, the induction coil includes an independently controlled first induction coil and a second induction coil, and the ratio of the length of the first induction coil to the length of the second induction coil is 1:6 to 1:3, 1:3 to 3:5 or 3:5 to 1:1.

[0010] Further, the length of the second heating unit is equal to the length of the first induction coil. When the first induction coil is arranged above the second induction coil, the second heating unit is arranged at the upper part of the aerosol generating device; or when the first induction coil is arranged below the second induction coil, the second heating unit is arranged at the lower part of the aerosol generating device.

[0011] Further, the second heating unit is made of a ferromagnetic material, and the second heating unit generates heat after being induced by the first induction coil. The second heating unit is selected from one or more of iron, cobalt, and nickel.

[0012] Further, the heating method of the second heating unit is resistance heating or air heating.

[0013] Second aspect: Provide an aerosol generating system, the aerosol generating system includes the above-mentioned aerosol generating device, the aerosol generating system further includes an aerosol generating article, the aerosol generating article includes a filter section, a cooling section, a support section and a tobacco section, and a susceptor is arranged in the tobacco section.

[0014] Further, the shape of the cross-sectional area of the susceptor in the tobacco section is selected from one or more of an M-shaped, a V-shaped, a W-shaped, an L-shaped, a Z-shaped, and an X-shaped.

[0015] Third aspect: Provide a control method for an aerosol generating system. The control method is used for the above-mentioned aerosol generating system and includes: S1: After inserting the aerosol generating article into the aerosol generating device, the aerosol generating system starts the preheating stage; S2: After the preheating time, the aerosol generating system enters the heating stage from the preheating stage; the preheating time is 16 - 19 s, 19 - 22 s or 22 - 25 s; in the preheating stage, the first heating unit and the second heating unit heat simultaneously; in the heating stage, the second heating unit is turned off or the heating temperature of the second heating unit is reduced.

[0016] The present patent has the following beneficial effects:

[0017] 1. The present patent relates to the field of heated non-combustible tobacco, and provides an aerosol generating device. The control unit, power supply, heating chamber and heating assembly are arranged in the housing. The heating assembly includes a first heating unit, and the first heating unit includes an induction coil. The heating assembly further includes a second heating unit. During use, the second heating unit can directly generate heat under the control of the control unit to heat the aerosol generating article for supplementary heating. The dual heat source structure can make up for the problem of insufficient smoke volume in the first two puffs caused by insufficient heat of the susceptor in a single electromagnetic induction heating system.

[0018] 2. The present patent is provided with a first heating body and a second heating body. The first heating body and the susceptor form an electromagnetic induction heating system. The second heating body can be resistance heating or air heating. The second heating body has the characteristics of fast heating speed and high temperature rise; the temperature rise rate of the first heating body is relatively low, and it heats the tobacco by directly contacting the tobacco, playing a role in preheating the tobacco.

[0019] 3. The present patent further includes an aerosol generating system and a control method for an aerosol generating system. According to the aerosol generating system in the present patent, a control logic is proposed: In the first about 20 s, the electromagnetic heating system and the peripheral heating system, the two heating sources work simultaneously. After 20 s, with the accumulation of heat, the peripheral heating element is turned off or the heating temperature of the peripheral heating element is reduced, so as to reduce the battery energy consumption and avoid the bad smell generated by the baking of the heating cigarette paper due to the too high temperature of the peripheral heating element. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present patent, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present patent, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0021] Figure 1 It is a semi-sectional schematic diagram of the aerosol generating device in Embodiment 1;

[0022] Figure 2 It is a schematic cross-sectional view of the aerosol generating article in Example 1;

[0023] Figure 3 It is a schematic three-dimensional structure view of the tobacco section in Example 1;

[0024] Figure 4 It is a schematic half-sectional view of the aerosol generating system in Example 1;

[0025] Figure 5 It is a process flow chart of the control method in Example 1;

[0026] Figure 6 It is a schematic half-sectional view of the aerosol generating device in Example 2;

[0027] Figure 7 It is a schematic half-sectional view of the aerosol generating device in Example 3;

[0028] Figure 8 It is a schematic half-sectional view of the aerosol generating device in Example 4;

[0029] Figure 9 It is a schematic half-sectional view of the aerosol generating device in Example 5;

[0030] Figure 10 It is a schematic half-sectional view of the aerosol generating device in Example 6.

[0031] Among them, the reference numerals are explained as follows:

[0032] 100: aerosol generating device;

[0033] 110: housing;

[0034] 120: control unit;

[0035] 130: power supply;

[0036] 140: heating chamber;

[0037] 150: first heating unit;

[0038] 151: induction coil;

[0039] 152: first induction coil;

[0040] 153: second induction coil;

[0041] 160: second heating unit;

[0042] 161: first resistive heating element;

[0043] 162: second resistive heating element;

[0044] 163: The third resistive heating element;

[0045] 164: The fourth resistive heating element;

[0046] 165: The fifth resistive heating element;

[0047] 166: The air heating element;

[0048] 200: The aerosol generating article;

[0049] 210: The filter section;

[0050] 220: The cooling section;

[0051] 230: The support section;

[0052] 240: The tobacco section;

[0053] 241: The receptor. Detailed implementation manners

[0054] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The advantages and features of the present disclosure and the methods for realizing them can be clarified by the accompanying drawings and the embodiments described in detail later. However, the technical idea of the present disclosure is not limited to the embodiments described below and can be realized in various different forms. The following embodiments are only used to fully disclose the present disclosure so that those with ordinary knowledge in the technical field to which the present disclosure belongs can fully understand the scope of the present disclosure. The technical idea of the present disclosure is determined by the scope of the claims of the present disclosure.

[0055] When adding reference numerals to the components in the respective drawings, it should be noted that even for components shown in different drawings, the same reference numerals refer to the same components. And, in the process of describing the present disclosure, when it is considered that a detailed description of a related well-known technical configuration or function will obscure the gist of the present disclosure, its detailed description may be omitted.

[0056] Unless otherwise defined, all terms (including technical and scientific terms) used in this specification can be used as meanings commonly understood by those with ordinary knowledge in the technical field to which the present disclosure belongs. And, for terms commonly used and defined in the dictionary, without a clear special definition, they will not be interpreted abnormally or excessively. The terms used in this specification are only for the purpose of describing the embodiments and are not intended to limit the present disclosure. In this specification, unless otherwise specified, singular nouns also include plural forms.

[0057] The terms used in this patent are for the purpose of describing specific embodiments only and are not intended to limit this patent. The singular forms "a", "the", and "said" used in this patent and the appended claims are also intended to include the plural forms unless the context clearly dictates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0058] First, some terms used in various embodiments of the present disclosure will be clarified.

[0059] In the following embodiments, an "aerosol generating article" may refer to any article that can be smoked or any article that can provide a smoking experience, whether based on tobacco, tobacco derivatives, expanded tobacco, reconstituted tobacco, or tobacco substitutes. For example, aerosol generating articles may include aerosol generating articles such as cigarettes, cigars, and cigarillos. As another example, aerosol generating articles may include combustible aerosol generating articles and aerosol generating articles.

[0060] An aerosol-forming article may have the appearance of a traditional cigarette. Cigarette articles such as cigarette rods and their specifications are usually named according to the length of the cigarette rod, as described below. The so-called "standard" usually refers to a cigarette rod with a length in the range of 68 mm to 75 mm, for example, a length of about 68 mm to about 72 mm. The so-called "short" or "mini" refers to a cigarette rod with a length of less than 68 mm. The so-called "oversize" usually refers to a cigarette rod with a length in the range of 75 mm to 91 mm, for example, a length of about 79 mm to about 88 mm. The so-called "long" or "extra-long" usually refers to a cigarette rod with a length in the range of 91 mm to 105 mm, for example, a length of about 94 mm to about 101 mm. And the so-called "extra-extra-long" usually refers to a cigarette rod with a length in the range of about 110 mm to about 121 mm. In addition, cigarette articles are named according to the outer circumference of the cigarette rod, as described below. The so-called "standard" refers to a cigarette rod with an outer circumference of about 23 mm to 25 mm. The so-called "thick" refers to a cigarette rod with an outer circumference of more than 25 mm. The so-called "thin" refers to a cigarette rod with an outer circumference of about 22 mm to 23 mm. The so-called "slender" refers to a cigarette rod with an outer circumference of about 19 mm to 22 mm. The so-called "ultra-thin" refers to a cigarette rod with an outer circumference of about 16 mm to 19 mm. And the so-called "micro-thin" refers to a cigarette rod with an outer circumference of less than about 16 mm. Therefore, an oversize and ultra-thin cigarette rod has, for example, a length of about 83 mm and an outer circumference of about 17 mm. Standard and oversize cigarette rods, that is, cigarette rods with a length of 75 mm to 91 mm and an outer circumference of 23 mm to 25 mm, are favored by many customers. Cigarette articles of each specification can also be manufactured with filter tips of different lengths. Usually, short filter tips are used for cigarette articles of specifications with short lengths and outer circumferences. Usually, the filter tip length ranges from 15 mm used with cigarette articles of "short" and "standard" specifications to 30 mm used with cigarette articles of "extra-extra-long" and "ultra-thin" specifications. The length of the tipping paper in the length direction of the filter-tipped cigarette article is, for example, 3 mm to 10 mm longer than the filter tip length.

[0061] In the following embodiments, "aerosol generating material" may refer to a substance that produces smoke and / or aerosol or is used for smoking. For example, the aerosol generating material may include tobacco substances. For example, the aerosol generating material may include tobacco leaves, tobacco stems, or substances processed therefrom. As a more specific example, the aerosol generating material may include shredded tobacco leaves, shredded reconstituted tobacco, expanded flue-cured tobacco, expanded stem cuttings, and reconstituted tobacco leaves. However, the present disclosure is not limited thereto.

[0062] Preferably, the aerosol - forming substrate may have a length between about 5 mm and about 15 mm, such as between about 8 mm and about 12 mm. In one embodiment, the aerosol - forming substrate may have a length of about 1 mm. In a preferred embodiment, the aerosol - forming substrate has a length of about 12 mm.

[0063] In the following examples, an "aerosol generation device" refers to a device that interacts with an aerosol - forming substrate to generate an aerosol.

[0064] The aerosol generation device is used to illustrate a device that interacts with the aerosol - forming substrate of an aerosol - generating article to generate an aerosol. Preferably, the aerosol generation device is a smoking device that interacts with the aerosol - forming substrate of the aerosol - generating article to generate an aerosol that can be directly inhaled into a user's lungs through the user's mouth. The aerosol generation device can be a holder for a smoking article.

[0065] The term "aerosol generation system" refers to the combination of an aerosol generation device and an aerosol - generating article. In the aerosol generation system, the aerosol - generating article and the aerosol generation device cooperate to generate a breathable aerosol.

[0066] The aerosol - generating article is designed to engage with an electrically - operated aerosol generation device including an inductive heating source. The inductive heating source or inductor generates a fluctuating electromagnetic field to heat a susceptor located within the fluctuating electromagnetic field. In use, the aerosol - generating article is engaged with the aerosol generation device such that the susceptor is located within the fluctuating electromagnetic field generated by the inductor.

[0067] A susceptor refers to a material that can convert electromagnetic energy into heat. When located in a fluctuating electromagnetic field, the eddy currents induced in the susceptor cause heating of the susceptor. When an elongated susceptor is positioned in thermal contact with the aerosol - forming substrate, the aerosol - forming substrate is heated by the susceptor.

[0068] The length dimension of the susceptor is substantially greater than its width dimension or its thickness dimension, such as more than twice its width dimension or its thickness dimension. Thus, the susceptor can be described as an elongated susceptor. The susceptor can be arranged generally longitudinally within the aerosol - forming substrate. This means that the length dimension of the elongated susceptor is arranged to be approximately parallel to the longitudinal direction of the aerosol - forming substrate, such as within plus or minus 10 degrees of the longitudinal direction of the aerosol - forming substrate. In a preferred embodiment, the elongated susceptor can be located at a radially - central position within the aerosol - forming substrate and extends along the longitudinal axis of the aerosol - forming substrate.

[0069] The receptor is preferably needle-shaped, strip-shaped or leaf-shaped. Preferably, the receptor has a length between 5 mm and 15 mm, such as between 6 mm and 12 mm or between 8 mm and 10 mm. Preferably, the elongated receptor has substantially the same length as the aerosol-forming substrate. Preferably, the receptor may have a width of 1 mm to 5 mm and a thickness between 0.01 mm and 2 mm, such as a thickness of 0.5 mm to 2 mm. Preferred embodiments may have a thickness between 10 microns and 500 microns, more preferably between 10 microns and 100 microns. If the receptor has a constant cross-section, such as a circular cross-section, it has a preferred width or diameter of 1 mm to 5 mm.

[0070] In the following embodiments, the term "varying current" includes any current that varies over time to produce a varying magnetic field. In the following embodiments, the term "varying current" is intended to include alternating current. In the case where the varying current is alternating current, the alternating current generates an alternating magnetic field.

[0071] In the following embodiments, the term "length" refers to the major dimension in the longitudinal direction of an aerosol-generating device, or an aerosol-generating article, or a component of an aerosol-generating device or an aerosol-generating article.

[0072] In the following embodiments, as used herein, the term "cross-section" is used to describe the cross-section of an aerosol-generating device, or an aerosol-generating article, or a component of an aerosol-generating device or an aerosol-generating article, in a direction perpendicular to the longitudinal direction at a particular position along its length.

[0073] Example 1

[0074] Please refer to Figure 1 , which is the first embodiment of this patent. An aerosol-generating device 100 includes a housing 110, a control unit 120, a power source 130, a heating chamber 140, and a heating assembly, wherein the control unit 120, the power source 130, the heating chamber 140, and the heating assembly are disposed within the housing 110.

[0075] The power source 130 can be any suitable power source, such as a direct 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 a lithium cobalt, lithium iron phosphate, lithium titanate, or lithium polymer battery.

[0076] The control unit 120 can be a simple switch. Alternatively, the control element can be a circuit and can include one or more microprocessors or microcontrollers.

[0077] Specifically, the housing 110 is disposed at the outermost part of the aerosol generating device 100 and has a thin cylindrical shell structure. The heating chamber 140 is disposed at the center of the aerosol generating device 100 in the axial direction. The heating assembly is disposed between the heating chamber 140 and the housing 110. The control unit 120 is disposed below the heating chamber 140, and the power supply 130 is disposed below the control unit 120.

[0078] The aerosol generating device can generate a fluctuating electromagnetic field between about 1 MHz and 30 MHz, such as between 2 MHz and 10 MHz, such as between 5 MHz and 7 MHz, through the induction coil of the induction emitter.

[0079] Preferably, the aerosol generating device can generate a fluctuating electromagnetic field with a field strength (H field) between 1 kA / m and 5 kA / m, such as between 2 kA / m and 3 kA / m, such as about 2.5 kA / m.

[0080] Specifically, the heating chamber 140 is used to accommodate part of the aerosol generating article 200 to be heated. The length of the aerosol generating article 200 inserted into the heating chamber 140 accounts for 1 / 2 of the entire aerosol generating article 200.

[0081] Specifically, the heating assembly includes a first heating unit 150. The first heating unit 150 in this embodiment is a spiral induction coil 151 surrounding the outside of the heating chamber 140. The length of the induction coil 151 is equal to the length of the heating chamber 140. When the aerosol generating device 100 is in use, the control unit 120 controls the induction coil 151 to generate a fluctuating electromagnetic field, thereby transmitting the electrical energy of the power supply 130 to the susceptor 241 in the aerosol generating article 200 and causing the susceptor 241 to heat up.

[0082] The material of the induction coil 151 should be selected as a material with good electrical conductivity, such as metal, etc. In addition, in this patent, the material of the induction coil 151 should also have good elastic deformation ability, and metals such as spring steel, gold, and silver can be used.

[0083] A second heating unit 160 is further disposed between the first heating unit 150 and the heating chamber 140. The second heating unit 160 is used for heat compensation during the preheating stage of the aerosol generating article 200. The second heating unit 160 in this embodiment adopts a first resistive heating element 161. The first resistive heating element 161 is longitudinally wrapped around the outer wall of the heating chamber 140, and the length of the first resistive heating element 161 is basically equal to the length of the heating chamber 140.

[0084] Specifically, the first resistive heating element 161 can be longitudinally injection-molded on the heating chamber wall 140 without being exposed, but the present invention is not limited thereto. Specifically, the first resistive heating element 161 is made of a non-ferromagnetic material, and the first resistive heating element 161 can be ceramic, austenite, copper, aluminum, lead, tin, zinc, or an alloy thereof, preferably a ceramic resistive heating element.

[0085] Specifically, please refer to Figure 2 , the aerosol-generating article 200 adapted for this embodiment sequentially includes a filter section 210, a cooling section 220, a support section 230, and a tobacco section 240, wherein a susceptor 241 is provided inside the tobacco section 240.

[0086] Preferably, the filter section 210, the cooling section 220, the support section 230, and the tobacco section 240 are generally cylindrical and have generally comparable outer diameters. For example, they have an outer diameter of at least 5 mm. Preferably, they have an outer diameter 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%.

[0087] It may be possible to heat the preferred susceptor 241 to a temperature exceeding 250 degrees Celsius. Suitable susceptors 241 can include a non-metallic core having a metal layer disposed on the non-metallic core, such as metal traces formed on the surface of a ceramic core.

[0088] The susceptor 241 can have an outer protective layer, such as a ceramic protective layer or a glass protective layer that encapsulates the elongate susceptor 241, thereby forming a complete heating body. The susceptor 241 can include a protective coating formed of glass, ceramic, or an inert metal, and the protective coating is formed on the core of the susceptor 241 material.

[0089] The susceptor 241 is arranged in thermal contact with the aerosol-forming substrate. Therefore, when the susceptor 241 is heated, the aerosol-forming substrate is heated and an aerosol is formed. In one embodiment, the heating body including the susceptor 241 is inserted into the aerosol-forming substrate, and the aerosol-generating device can include a single or multiple elongate heating bodies.

[0090] Specifically, the shape of the cross-sectional area of the susceptor 241 in the tobacco section 240 is selected from an M-shaped, V-shaped, W-shaped, L-shaped, Z-shaped, X-shaped, preferably an M-shaped, please refer to Figure 3 .

[0091] Specifically, please refer to Figure 4, an aerosol generating system, including the aerosol generating device 100 and the aerosol generating article 200 in this embodiment. Before suction, the aerosol generating article 200 is inserted into the heating cavity 140 of the aerosol generating device 100. At this time, the susceptor 241 and the induction coil 151 form an electromagnetic induction heating system. The induction coil 151 is connected to the power supply 130, and the power supply 130 provides an alternating current for the induction coil 151. The alternating current flowing through the coil generates an alternating magnetic field passing through the susceptor 241, and this alternating magnetic field causes eddy current effects inside the susceptor 241 to generate heat, thereby heating the aerosol generating matrix in the tobacco section 240. The control unit 120 independently controls the first resistive heating element 161 and the electromagnetic induction heating system composed of the susceptor 241 and the induction coil 151 respectively.

[0092] Specifically, please refer to Figure 5 , a control method for an aerosol generating system, including two steps:

[0093] S1: After inserting the aerosol generating article 200 into the aerosol generating device 100, the aerosol generating system starts the preheating stage;

[0094] S2: After the preheating time, the aerosol generating system enters the heating stage from the preheating stage;

[0095] Specifically, in the preheating stage, the electromagnetic induction heating system composed of the induction coil 151 and the susceptor 241 and the first resistive heating element 161 work simultaneously. This can make up for the problem of insufficient smoke volume in the first two puffs before suction caused by insufficient heat of the susceptor 241 in a single electromagnetic induction heating system. With the heat source supplement of the first resistive heating element 161, the preheating time of the preheating stage is effectively shortened, and the preheating time in this embodiment is 20 s. After the preheating stage, it enters the heating stage. Among them, the electromagnetic induction heating system provides the main heat energy for the aerosol generating article 200, and the first resistive heating element 161 is turned off or the heating temperature of the first resistive heating element 161 is reduced after 20 s with the accumulation of heat. This can reduce the battery energy loss and avoid over-baking the paper of the aerosol generating article 200 by the first resistive heating element 161 at too high a temperature, thus generating bad odors.

[0096] Embodiment 2

[0097] Please refer to Figure 6 , which is the second implementation mode of this patent. The difference from the first implementation mode is that the second heating unit 160 in this embodiment uses a second resistive heating element 162. The second resistive heating element 162 is longitudinally wrapped around the outer wall of the heating cavity 140 and is arranged at the upper part of the outer wall of the heating cavity 140. The length of the second resistive heating element 162 accounts for 1 / 3 of the length of the heating cavity 140.

[0098] Embodiment 3

[0099] Please refer to Figure 7 which is the third embodiment of this patent. The difference from the first embodiment is that the second heating unit 160 in this embodiment uses a third resistive heating element 163. The third resistive heating element 163 is longitudinally wrapped around the outer wall of the heating chamber 140 and is arranged at the lower part of the outer wall of the heating chamber 140. The length of the third resistive heating element 163 accounts for 1 / 3 of the length of the heating chamber 140.

[0100] Embodiment 4

[0101] Please refer to Figure 8 which is the fourth embodiment of this patent. The difference from the first embodiment is that the first heating unit 150 in this embodiment includes a first induction coil 152 and a second induction coil 153 that surround the outside of the heating chamber 140. Both the first induction coil 152 and the second induction coil 153 are spiral coils, and the first induction coil 152 is arranged above the second induction coil 153. When the aerosol generating device 100 is in use, the control unit 120 controls the induction coil 151 to generate a fluctuating electromagnetic field so as to transmit the electric energy of the power supply 130 to the susceptor 241 in the aerosol generating article 200 and make the susceptor 241 heat up.

[0102] Specifically, the combined length of the first induction coil 152 and the second induction coil 153 is equal to the length of the heating chamber 140, and the ratio of the length of the first induction coil 152 to the length of the second induction coil 153 is 1:3.

[0103] The second heating unit 160 uses a fourth resistive heating element 164. The fourth resistive heating element 164 is longitudinally arranged on the outer wall of the heating chamber 140. The length of the fourth resistive heating element 164 is equal to the length of the first induction coil 152 and is arranged beside the first induction coil 152 at a corresponding position.

[0104] The fourth resistive heating element 164 is made of ferromagnetic material, and the second heating unit 160 is selected from one or more of iron, cobalt, and nickel. This patent is not limited thereto.

[0105] The susceptor can be made of any material that can be heated inductively to a temperature sufficient to generate an aerosol from the aerosol-forming substrate. Preferred susceptors include metals or carbon. Preferred susceptors may include ferromagnetic materials such as ferrites, ferromagnetic steels or stainless steels. Suitable susceptors may be aluminum or may include aluminum. Preferred susceptors may be made of 400 series stainless steel, such as grade 410, grade 420 or grade 430 stainless steel. When placed in an electromagnetic field with similar frequency and field strength values, different materials will consume different amounts of energy. Therefore, the parameters of the susceptor, such as material type, length, width and thickness, can be changed within a known electromagnetic field to provide the required energy consumption.

[0106] Specifically, an aerosol generating system includes the aerosol generating device 100 and the aerosol generating article 200 in this embodiment. Before puffing, the aerosol generating article 200 is inserted into the heating chamber 140 of the aerosol generating device 100. At this time, the first induction coil 152 and the fourth resistive heating element 164 form an electromagnetic induction heating system, while the second induction coil 153 and the susceptor 241 form an electromagnetic induction heating system. The first induction coil 152 and the second induction coil 153 are connected to the power supply 130. The power supply 130 provides an alternating current for the first induction coil 152 and the second induction coil 153. The alternating current flowing through the coils generates an alternating magnetic field that can pass through the magnetoresistive resistor of the fourth resistive heating element 164 and the susceptor 241. This alternating magnetic field generates eddy current effects inside the susceptor 241 and the fourth resistive heating element 164 to generate heat, thus forming a dual heat source structure.

[0107] Specifically, the fourth resistive heating element 164 generates heat under the magnetic induction of the first induction coil 152, thus serving as the second heat source for heating the tobacco section 240; after the susceptor 241 enters the second induction coil 153, it generates heat under the magnetic induction, thus serving as the first heat source for heating the tobacco section 240.

[0108] Specifically, a control method for an aerosol generating system includes two steps:

[0109] S1: After the aerosol generating article 200 is inserted into the aerosol generating device 100, the aerosol generating system enters the preheating stage;

[0110] S2: After the preheating time, the aerosol generating system enters the heating stage from the preheating stage;

[0111] Specifically, during the preheating stage, the electromagnetic induction heating system composed of the first induction coil 152 and the fourth resistance heating element 164 and the electromagnetic induction heating system composed of the second induction coil 153 and the susceptor 241 work simultaneously. This can compensate for the problem of insufficient smoke volume in the first two puffs before suction caused by insufficient heat of the susceptor 241 in a single electromagnetic induction heating system, and effectively shorten the preheating time of the preheating stage with the heat source supplement of the first induction coil 152 and the fourth resistance heating element 164, so that the preheating time in this embodiment is 20 s. After the preheating stage, it enters the heating stage. Among them, the electromagnetic induction heating system composed of the second induction coil 153 and the susceptor 241 provides the main heat energy for the aerosol-generating article 200, and the electromagnetic induction heating system composed of the first induction coil 152 and the fourth resistance heating element 164 shuts down or reduces the power output of the first induction coil 152 after 20 s as the heat accumulates. This can reduce the battery energy loss and avoid over-baking the paper of the aerosol-generating article 200 at too high a temperature, thus generating bad odors.

[0112] Embodiment 5

[0113] Please refer to Figure 9 , which is the fifth implementation mode of this patent. The difference from the fourth implementation mode is that in this embodiment, the first induction coil 152 is arranged below the second induction coil 153.

[0114] The second heating unit 160 uses a fifth resistance heating element 165. The fifth resistance heating element 165 is arranged along the longitudinal direction on the outer wall of the heating chamber 140, and the length of the fifth resistance heating element 165 is equal to the length of the first induction coil 152. In this embodiment, the fifth resistance heating element 165 and the first induction coil 152 are arranged together at the lower position.

[0115] Embodiment 6

[0116] Please refer to Figure 10 , which is the sixth implementation mode of this patent. The difference from the first implementation mode is that in this embodiment, the heating assembly further includes a second heating unit 160, and the second heating unit 160 is arranged below the heating chamber 140 and can provide a heat source for the bottom surface of the tobacco section 240. The second heating unit 160 uses an air heating element 166, and the structure of the air heating element 166 is a porous honeycomb hole structure, and the material is a graphite heating body.

[0117] At the same time, the first resistance heating element 161 that is longitudinally wrapped around the outer wall of the heating chamber 140 in Embodiment 1 does not exist in this embodiment, and the electromagnetic induction heating system composed of the susceptor 241 and the induction coil 151 and the air heating element 166 form a dual heat source structure.

[0118] Specifically, an aerosol generating system includes the aerosol generating device 100 and the aerosol generating article 200 in this embodiment. Before suction, the aerosol generating article 200 is inserted into the heating chamber 140 of the aerosol generating device 100. At this time, the susceptor 241 and the induction coil 151 form an electromagnetic induction heating system. The induction coil 151 is connected to the power supply 130, and the power supply 130 provides an alternating current for the induction coil 151. The alternating current flowing through the coil generates an alternating magnetic field passing through the susceptor 241, and this alternating magnetic field causes an eddy current effect inside the susceptor 241 to generate heat, thereby heating the aerosol generating matrix in the tobacco section 240. The control unit 120 independently controls the air heating element 166 and the electromagnetic induction heating system composed of the susceptor 241 and the induction coil 151 respectively.

[0119] Specifically, a control method for an aerosol generating system includes two steps:

[0120] S1: After inserting the aerosol generating article 200 into the aerosol generating device 100, the aerosol generating system starts the preheating stage;

[0121] S2: After the preheating time, the aerosol generating system enters the heating stage from the preheating stage;

[0122] Specifically, in the preheating stage, the electromagnetic induction heating system composed of the induction coil 151 and the susceptor 241 and the air heating element 166 work simultaneously. This can make up for the problem of insufficient smoke volume in the first two puffs before suction caused by insufficient heat of the susceptor 241 in a single electromagnetic induction heating system. With the heat source supplement of the air heating element 166, the preheating time of the preheating stage is effectively shortened, and the preheating time in this embodiment is 20 s. After passing through the preheating stage, it enters the heating stage. Among them, the electromagnetic induction heating system provides the main heat energy for the aerosol generating article 200, and the air heating element 166 is turned off or the heating temperature of the air heating element 166 is reduced as the heat accumulates after 20 s. This can reduce the battery energy loss and avoid over-baking the paper of the aerosol generating article 200 by the air heating element 166 at too high a temperature, thus generating bad odors.

[0123] Comparative Example 1

[0124] In this comparative example, the preheating time was adjusted to 10 s based on Example 1.

[0125] Comparative Example 2

[0126] In this comparative example, the preheating time was adjusted to 25 s based on Example 1.

[0127] Comparative Example 3

[0128] On the basis of Example 1, this comparative example adjusts the length of the second resistive heating element 162 to account for 1 / 4 of the length of the heating chamber 140.

[0129] Comparative Example 4

[0130] On the basis of Example 1, this comparative example adjusts the length of the second resistive heating element 162 to account for 1 / 3 of the length of the heating chamber 140.

[0131] Comparative Example 5

[0132] On the basis of Example 1, this comparative example adjusts the length of the second resistive heating element 162 to account for 1 / 2 of the length of the heating chamber 140.

[0133] The smoking evaluation experiments were conducted on Example 1 and Comparative Examples 1 and 2, and the results are recorded in Table 1, as shown in Table 1:

[0134] Table 1: Results of the smoking evaluation experiments on Example 1 and Comparative Examples 1 and 2

[0135]

[0136] The experimental results show that when the preheating time is 20 s, the smoke is full and there is no paper-burning smell, and the smoking experience is the best.

[0137] The baking state detection experiments were conducted on Example 1 and Comparative Examples 3 - 5, and the results are recorded in Table 2, as shown in Table 2:

[0138] Table 2: Results of the smoking evaluation experiments on Example 1 and Comparative Examples 1 and 2

[0139]

[0140]

[0141] As the length of the peripheral resistive sub-heat source increases, the overall heat increases, and the paper smell also begins to gradually appear. At the same time, under the same length and time, the smoke volume is larger in the upper half of the sub-heat source, and the ratio of the length of the second heating unit 160 to the length of the heating chamber 140 is preferably about 1 / 3.

[0142] In the specification of this patent, terms indicating directions, such as "front", "rear", "side", "top", "bottom", etc., are used to describe various example structural parts and components of this patent. However, these terms are used here only for the convenience of description and are determined based on the example orientations shown in the drawings. Since the embodiments disclosed in this patent can be arranged in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations, and are not necessarily limited to directions opposite or consistent with the direction of gravity.

[0143] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0144] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation. The orientation or positional relationship indicated by terms such as "upper", "lower", etc. is defined with reference to the coordinates of the drawings, and is only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of this patent. The terms "first", "second", etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0145] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this patent belongs. The terms used in the specification of this patent are only for the purpose of describing specific embodiments and are not intended to limit this patent. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0146] In addition, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this patent does not further describe various possible combination methods.

[0147] In addition, any combination can be made between various different embodiments of this patent, as long as it does not violate the idea of this patent, and it should also be regarded as the content disclosed by this patent.

Claims

1. An aerosol generating device, characterized in that: The aerosol generating device comprises: a housing, a control unit, a power supply, a heating chamber and a heating component, wherein: The control unit, the power supply, the heating chamber and the heating assembly are arranged in the housing; The heating chamber is used to accommodate at least a portion of the length of the aerosol-generating article to be heated; The heating assembly comprises a first heating unit, the first heating unit comprises an induction coil, in use, the induction coil generates a fluctuating electromagnetic field under the control of the control unit so as to transmit the electrical energy of the power source to the susceptor in the aerosol generating article and heat it; The heating assembly further comprises a second heating unit which, in use, can directly generate heat to heat the aerosol-generating article under the control of the control unit.

2. The aerosol generating device according to claim 1, characterized in that: The induction coil is selected from one or more of a spiral coil, a flat planar coil, a pancake coil, and a curved planar coil.

3. The aerosol generating device according to claim 1, characterized in that: The second heating unit is made of non-ferromagnetic material, and is selected from one or more of ceramic, austenite, copper, aluminum, lead, tin, and zinc; the structure of the second heating unit includes a complete circular cylindrical structure or an incomplete arc structure, the number of the incomplete arc structures is an even number, and the incomplete arc structures are symmetrically arranged.

4. The aerosol generating device according to claim 1, characterized in that: The induction coil includes a first induction coil and a second induction coil that are independently controlled, and a ratio of a length of the first induction coil to a length of the second induction coil is 1:6 to 1:3, 1:3 to 3:5, or 3:5 to 1:

1.

5. The aerosol generating device according to claim 4, characterized in that: The length of the second heating unit is equal to the length of the first induction coil, and when the first induction coil is arranged above the second induction coil, the second heating unit is arranged on the upper part of the aerosol generating device; Or when the first induction coil is disposed below the second induction coil, the second heating unit is disposed at a lower portion of the aerosol generating device.

6. The aerosol generating device according to claim 4, characterized in that: The second heating unit is made of ferromagnetic material, and the second heating unit generates heat after the first induction coil induces the second heating unit. The second heating unit is made of one or more selected from iron, cobalt, and nickel. The structure of the second heating unit includes a complete circular cylindrical structure or an incomplete arc structure, the number of the incomplete arc structures is an even number, and the incomplete arc structures are symmetrically arranged.

7. The aerosol generating device according to claim 1, characterized in that: The second heating unit is heated by resistance heating or air heating.

8. An aerosol generating system, characterized in that: The aerosol generating system comprises an aerosol generating device as claimed in any one of claims 1 to 7, and the aerosol generating system also comprises an aerosol generating product, the aerosol generating product comprises a filtering section, a cooling section, a supporting section and a tobacco section, and a receptor is provided in the tobacco section.

9. An aerosol generating system according to claim 8, characterized in that The shape of the cross-sectional area of ​​the receptor in the tobacco segment is selected from one or more of an M-shape, a V-shape, a W-shape, an L-shape, a Z-shape, and an X-shape.

10. A method for controlling an aerosol generating system, characterized in that: The control method is used for the aerosol generating system according to any one of claims 8 to 9, comprising: S1: After the aerosol generating article is inserted into the aerosol generating device, the aerosol generating system starts the preheating stage; S2: after the preheating time, the aerosol generating system enters the heating stage from the preheating stage; The preheating time is 16 to 19 seconds, 19 to 22 seconds or 22 to 25 seconds; In the preheating stage, the first heating unit and the second heating unit are heated simultaneously; In the heating stage, the second heating unit is turned off or the heating temperature of the second heating unit is lowered.

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