Heating assembly and aerosol generating device

Abstract

The utility model provides a heating assembly and an aerosol generating device, and the heating assembly comprises a sensing body which is internally provided with a heating cavity and a containing cavity which are sequentially arranged in the axial direction from the near end to the far end; at least part of the air heater is contained in the containing cavity; the first magnetic field generator is configured to generate a changing first magnetic field, so that a first local area, close to the near end, of the susceptor is penetrated by the changing first magnetic field to generate heat; the second magnetic field generator is configured to generate a changing second magnetic field, so that a second local area, close to the far end, of the susceptor is penetrated by the changing second magnetic field to generate heat; the second magnetic field generator is independent of the first magnetic field generator, and the second magnetic field generator and the heating cavity are arranged at intervals in the axial direction. The magnetic field generator and the heating cavity are arranged at intervals in the axial direction, so that the distance is kept between the bottom of the aerosol generating product and the heat source, the problem that the bottom of the aerosol generating product is prone to being overheated and scorched is solved, and the suction experience of a user is improved.

Description

Technical Field

[0001] The present application relates to the technical field of aerosol generation, and in particular to a heating component and an aerosol generating device. Background Art

[0002] Smoking articles such as cigarettes and cigars burn tobacco to produce smoke during use. Attempts have been made to provide alternatives to these tobacco-burning articles by creating products that release compounds without burning. Examples of such products are aerosol generating devices, which release compounds by heating tobacco rather than burning it.

[0003] A known aerosol generating device is provided with a honeycomb structure with honeycomb holes. The honeycomb holes serve as air passages for air to pass through the honeycomb structure. When the air flows through the honeycomb holes, the air can be heated to form a hot air flow, which in turn heats the aerosol generating product. Usually, the distance between the bottom of the aerosol generating product and the honeycomb structure is small, which causes the problem that the bottom of the aerosol generating product is easily overheated and burnt, reducing the user's smoking experience. Utility Model Content

[0004] The present application provides a heating component and an aerosol generating device to solve the problem that the bottom of an aerosol generating product is easily overheated and burnt.

[0005] In one aspect, the present application provides a heating assembly, comprising:

[0006] The sensor is configured as a tubular structure having a proximal end and a distal end opposite to each other, and a heating cavity and a receiving cavity are sequentially arranged in an axial direction from the proximal end toward the distal end.

[0007] an air heater, at least partially received in the receiving chamber;

[0008] A first magnetic field generator is configured to generate a changing first magnetic field, so that a first local area of ​​the susceptor close to the proximal end is penetrated by the changing first magnetic field and generates heat, thereby heating the aerosol generating product received in the heating chamber;

[0009] a second magnetic field generator configured to generate a changing second magnetic field so that a second local area of ​​the susceptor close to the distal end is penetrated by the changing second magnetic field and generates heat; at least a portion of the heat generated in the second local area can be transferred to the air heater to heat the air flowing through the air heater, thereby forming a hot air flow and heating the aerosol generating product received in the heating chamber;

[0010] The second magnetic field generator is independent of the first magnetic field generator, and the second magnetic field generator and the heating chamber are spaced apart along the axial direction.

[0011] In one example, the first magnetic field generator and the receiving cavity are spaced apart along the axial direction.

[0012] In one example, taking the end surface of the receiving cavity facing the proximal end as a reference surface, the spacing distance between the first magnetic field generator and the reference surface along the axial direction is greater than the spacing distance between the second magnetic field generator and the reference surface along the axial direction.

[0013] In one example, a partition is provided between the heating chamber and the receiving chamber.

[0014] In one example, the spacer includes a protrusion formed on the inner surface of the tubular structure.

[0015] In one example, the second magnetic field generator and the spacing portion are spaced apart from each other along the axial direction.

[0016] In one example, a first temperature detection unit and a second temperature detection unit are further included, wherein the first temperature detection unit is disposed in the first local area, and the second temperature detection unit is disposed in the second local area.

[0017] In one example, a bracket is further included for supporting the first magnetic field generator and the second magnetic field generator.

[0018] In one example, a heat insulating member is further included which is disposed between the bracket and the susceptor.

[0019] On the other hand, the present application provides an aerosol generating device, comprising a battery core for providing power and the heating component.

[0020] The heating assembly and aerosol generating device provided in the present application, by arranging the magnetic field generator and the heating chamber in an axial direction, keep the bottom of the aerosol generating product away from the heat source, thereby avoiding the problem of the bottom of the aerosol generating product being easily overheated and scorched, and improving the user's smoking experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute a scale limitation.

[0022] Figure 1 is a schematic diagram of an aerosol generating device provided in an embodiment of the present application;

[0023] Figure 2 is a schematic diagram of a heating assembly provided in an embodiment of the present application;

[0024] Figure 3 is an exploded schematic diagram of a heating assembly provided in an embodiment of the present application;

[0025] Figure 4 is a cross-sectional schematic diagram of a heating assembly provided in an embodiment of the present application;

[0026] Figure 5 is a cross-sectional schematic diagram of some components of a heating assembly provided in an embodiment of the present application;

[0027] Figure 6 is a cross-sectional schematic diagram of a receptor provided in an embodiment of the present application;

[0028] Figure 7 It is a cross-sectional schematic diagram of the air heater provided in the embodiment of the present application. DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of the present application, the present application is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween. The terms "upper", "lower", "left", "right", "inside", "outside" and similar expressions used in this specification are for illustrative purposes only.

[0030] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification and in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0031] like Figure 1 As shown, an aerosol generating device provided in an embodiment of the present application is configured to heat an aerosol generating article 20 to generate an inhalable aerosol.

[0032] In one example, the aerosol-generating article 20 includes a tobacco-containing material or a non-tobacco material. The aerosol-generating article 20 preferably adopts a solid matrix, and may include one or more of powder, particles, shredded strips, ribbons or sheets of one or more of herb leaves, tobacco leaves, homogenized tobacco, and expanded tobacco; or, the aerosol-generating article 20 may contain additional tobacco or non-tobacco volatile flavor compounds to be released when the aerosol-generating article 20 is heated. In some optional implementations, the aerosol-generating article 20 may be prepared to have the shape of a conventional cigarette or cigar.

[0033] In one example, the aerosol-generating article 20 may be contained in a smoking article. During operation, the smoking article containing the aerosol-generating article 20 may be completely contained within the aerosol-generating device; in this case, the user may draw on the mouthpiece of the aerosol-generating device. Alternatively, during operation, the smoking article containing the aerosol-generating article 20 may be partially contained in the aerosol-generating device; in this case, the user may draw directly on the mouthpiece of the smoking article.

[0034] A heating assembly 12 is disposed in the housing 11 of the aerosol generating device 10 , and the heating assembly 12 is used to heat the aerosol generating product 20 received in the heating chamber, so as to generate an inhalable aerosol.

[0035] The battery cell 13 provides power for operating the aerosol generating device 10. For example, the battery cell 13 can provide power to the heating component 12 for heating. In addition, the battery cell 13 can provide power required to operate other components in the aerosol generating device. The battery cell 13 can be a rechargeable battery or a disposable battery. The battery cell 13 can be, but is not limited to, a lithium iron phosphate (LiFePO4) battery. For example, the battery cell 13 can be a lithium cobalt oxide (LiCoO2) battery or a lithium titanate battery.

[0036] The circuit 14 includes, but is not limited to, a temperature detection unit, a control unit (such as a microcontroller MCU), etc., to achieve overall control of the aerosol generating device. The circuit 14 not only controls the operation of the battery cell 13 and the heating component 12, but also controls the operation of other components in the aerosol generating device. For example, the circuit 14 obtains the temperature information of the heating component 12 detected by the temperature detection unit, and controls the power provided by the battery cell 13 to the heating component 12 according to the information.

[0037] Figure 2-Figure 4 It is a schematic diagram of a heating component provided in an embodiment of the present application.

[0038] like Figure 2-Figure 4As shown, the heating assembly 12 includes a susceptor 121 , an air heater 122 , a first magnetic field generator 123 , a second magnetic field generator 124 , a first temperature detection unit 125 , a second temperature detection unit 126 , a bracket 127 and a heat insulating member 128 .

[0039] Please combine Figure 5-Figure 6 It is understood that the susceptor 121 is configured as a tubular structure, such as a cylindrical, prism or other cylindrical shape, preferably a cylindrical shape. The susceptor 121 includes a proximal end 121a and a distal end 121b opposite to each other. A heating chamber 121c and a receiving chamber 121d are formed in the susceptor 121, which are arranged in sequence along the axial direction from the proximal end 121a to the distal end 121b. A spacer 121e is provided between the heating chamber 121c and the receiving chamber 121d.

[0040] The heating chamber 121c is connected to the receiving chamber 121d. The length of the heating chamber 121c along the axial direction from the proximal end 121a to the distal end 121b is greater than the length of the receiving chamber 121d along the axial direction from the proximal end 121a to the distal end 121b. The length of the heating chamber 121c along the axial direction from the proximal end 121a to the distal end 121b is between 15 mm and 60 mm, and the diameter of the heating chamber 121c is between 5 mm and 15 mm. Through reasonable size design, the heating chamber 121c can be applied to short or long aerosol generating products.

[0041] At least part of the aerosol generating article 20 is removably received in the heating chamber 121c through the opening of the proximal end 121a. The air heater 122 can be at least partially received in the receiving chamber 121d through the opening of the distal end 121b; in the example shown in the figure, the air heater 122 is completely received in the receiving chamber 121d.

[0042] The bottom of the aerosol generating product 20 can be supported on the spacer 121e, and the spacer 121e can limit the air heater 122. The spacer 121e can prevent the bottom of the aerosol generating product 20 from contacting the air heater 122, that is, the bottom of the aerosol generating product 20 and the air heater 122 are kept apart to prevent the bottom of the aerosol generating product 20 from being easily overheated and burnt. In one example, the spacer 121e includes a protrusion formed on the inner surface of the susceptor 121, and the protrusion is formed by a part of the wall surface of the susceptor 121 protruding inwardly, that is, the protrusion is integrally formed on the susceptor 121, such as the protruding ring shown in the figure. In other examples, the spacer 121e can be a component embedded in the susceptor 121, which is not specifically limited.

[0043] The susceptor 121 can be made of at least one of the following materials: aluminum, iron, nickel, copper, bronze, cobalt, ordinary carbon steel, stainless steel, ferritic stainless steel, martensitic stainless steel or austenitic stainless steel. In this way, the susceptor 121 can be penetrated by the changing magnetic field to generate heat, thereby heating the aerosol generating article 20 received in the heating chamber 121c from the outside.

[0044] The air heater 122 is configured to be in a columnar shape, preferably a cylindrical shape. The air heater 122 has an upper end and a lower end that are separated from each other in the axial direction, and a plurality of air passages 122a penetrate the upper end and the lower end of the air heater 122 in the axial direction of the air heater 122. Adjacent air passages 122a may be completely isolated or connected. The cross-section of the air passage 122a may be in a circular, hexagonal, quadrilateral, triangular or other shapes, preferably a circular shape. With such a configuration, the air heater 122 is in the form of a honeycomb structure.

[0045] When the air heater 122 is completely contained in the containing cavity 121d, external air can flow in from the opening of the distal end 121b of the sensor 121, and then flow into the heating cavity 121c through the air channel 122a, that is, flow into the bottom of the aerosol generating product 20 received in the heating cavity 121c.

[0046] The air heater 122 may be made of at least one of the following materials: graphite; and at least one of oxides such as silicon oxide, aluminum oxide, iron oxide, and calcium oxide, for example, 7-85 wt% of graphite, 15-53% of oxides such as at least one of oxides such as silicon oxide, aluminum oxide, iron oxide, and calcium oxide. In this way, the air heater 122 can receive heat from the susceptor 121, thereby heating the air flowing through the air channel 122a, thereby forming a hot air flow and heating the aerosol generating article 20 received in the heating chamber 121c.

[0047] The first magnetic field generator 123 is independent of the second magnetic field generator 124, that is, the circuit 14 can provide an alternating current to the first magnetic field generator 123 based on the direct current provided by the battery cell 13 to make the first magnetic field generator 123 generate a changing first magnetic field, or provide another alternating current to the second magnetic field generator 124 to make the second magnetic field generator 124 generate a changing second magnetic field.

[0048] The first magnetic field generator 123 or the second magnetic field generator 124 is configured as a spirally wound tubular induction coil. The tubular induction coil can be sleeved or wrapped around the periphery of the bracket 127. The tubular induction coil can be wound by a relatively long wire material, and the wire material can have an elliptical, circular, square, rectangular, triangular or other polygonal cross section. The tubular induction coil has a lead (not shown) for electrical connection with the battery core 13.

[0049] The first local area of ​​the sensor 121 close to the proximal end 121a, for example Figure 6 The S1 area shown is within the range of the changing first magnetic field generated by the first magnetic field generator 123, so that the first local area of ​​the sensor 121 close to the proximal end 121a can be penetrated by the changing first magnetic field and generate heat, thereby heating the aerosol generating product 20 received in the heating chamber 121c from the periphery, effectively shortening the waiting time for the user to inhale the aerosol and ensuring the amount of aerosol during the first few puffs.

[0050] The second local area of ​​the sensor 121 close to the distal end 121b, for example Figure 6 The S2 region shown is within the range of the second magnetic field generated by the second magnetic field generator 124, so that the second local region of the susceptor 121 near the distal end 121b can be penetrated by the second magnetic field and generate heat; wherein, at least part of the heat generated in the second local region can be transferred to the air heater 122 to heat the air flowing through the air channel 122a, thereby forming a hot air flow and heating the aerosol generating product 20 received in the heating chamber 121c. In this way, on the one hand, the aerosol generating product 20 can be baked more fully and evenly, and on the other hand, it helps to improve the user's puffing experience.

[0051] In the above implementation, the first magnetic field generator 123 and the receiving chamber 121d are spaced apart in the axial direction, and the second magnetic field generator 124 and the heating chamber 121c are spaced apart in the axial direction. In this way, the temperature field center of the first local area of ​​the susceptor 121 near the proximal end 121a is kept at a certain distance from the bottom of the aerosol generating product 20, and the temperature field center of the second local area of ​​the susceptor 121 near the distal end 121b is also kept at a certain distance from the bottom of the aerosol generating product 20, thereby avoiding the problem that the bottom of the aerosol generating product is easily overheated and burnt.

[0052] In the above implementation, the end surface of the receiving cavity 121d facing the proximal end 121a is used as a reference surface, and the spacing distance between the first magnetic field generator 123 and the reference surface along the axial direction is greater than the spacing distance between the second magnetic field generator 124 and the reference surface along the axial direction.

[0053] like Figure 5 As shown, the distance between the first magnetic field generator 123 and the reference surface in the axial direction is d1, and the distance between the second magnetic field generator 124 and the reference surface in the axial direction is d2, and d1 is greater than d2. In this way, the problem of the bottom of the aerosol generating product being easily overheated and burnt can be further avoided.

[0054] Similarly, the spacing distance between the first magnetic field generator 123 and the spacing portion 121 e along the axial direction is greater than the spacing distance between the second magnetic field generator 124 and the spacing portion 121 e along the axial direction.

[0055] The first temperature detection unit 125 is arranged at the first local area of ​​the sensor 121 near the proximal end 121a to detect the temperature of the first local area of ​​the sensor 121 near the proximal end 121a; the second temperature detection unit 126 is arranged at the second local area of ​​the sensor 121 near the distal end 121b to detect the temperature of the second local area of ​​the sensor 121 near the distal end 121b. It can be understood that the first temperature detection unit 125 should be arranged at the center of the temperature field of the first local area of ​​the sensor 121 near the proximal end 121a, so as to better detect the temperature of the first local area of ​​the sensor 121 near the proximal end 121a; generally, the first temperature detection unit 125 is on the same horizontal plane as the center position of the first magnetic field generator 123 in the axial direction. The second temperature detection unit 126 is similar to this, that is, the second temperature detection unit 126 is on the same horizontal plane as the center position of the second magnetic field generator 124 in the axial direction.

[0056] The control unit in the circuit 14 can control the battery cell 13 to individually provide alternating current to the first magnetic field generator 123 based on the temperature information detected by the first temperature detection unit 125; it can also control the battery cell 13 to individually provide alternating current to the second magnetic field generator 124 based on the temperature information detected by the second temperature detection unit 126.

[0057] The bracket 127 is used to support the first magnetic field generator 123 and the second magnetic field generator 124. The bracket 127 is made of a high temperature resistant material, such as PEEK material. In the example shown in the figure, the bracket 127 is generally a tubular structure, the sensor 121 is arranged in the bracket 127, and the first magnetic field generator 123 and the second magnetic field generator 124 are both induction coils wound on the outer surface of the bracket 127.

[0058] The heat insulating member 128 is disposed between the bracket 127 and the sensor 121. The heat insulating member 128 is used to reduce the heat transfer to the outside. In the example shown in the figure, the heat insulating member 128 is a sleeve made of aerogel and wrapped on the sensor 121. The heat insulating member 128 is provided with an opening, and the first temperature detection unit 125 and the second temperature detection unit 126 are suitable for passing through the opening.

[0059] It should be noted that the preferred embodiments of the present application are given in the specification and drawings of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described in the specification. These embodiments are not used as additional limitations on the content of the present application. The purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. In addition, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all regarded as the scope of the description of the present application; further, for ordinary technicians in this field, they can be improved or transformed according to the above description, and all these improvements and transformations should belong to the scope of protection of the claims attached to the present application.

Claims

1. A heating component, characterized in that: include: The sensor is configured as a tubular structure having a proximal end and a distal end opposite to each other, and a heating cavity and a receiving cavity are sequentially arranged in an axial direction from the proximal end toward the distal end. an air heater, at least partially received in the receiving cavity; A first magnetic field generator is configured to generate a changing first magnetic field, so that a first local area of ​​the susceptor close to the proximal end is penetrated by the changing first magnetic field and generates heat, thereby heating the aerosol generating product received in the heating chamber; a second magnetic field generator configured to generate a changing second magnetic field so that a second local area of ​​the susceptor close to the distal end is penetrated by the changing second magnetic field and generates heat; at least a portion of the heat generated in the second local area can be transferred to the air heater to heat the air flowing through the air heater, thereby forming a hot air flow and heating the aerosol generating product received in the heating chamber; The second magnetic field generator is independent of the first magnetic field generator, and the second magnetic field generator and the heating chamber are spaced apart along the axial direction.

2. The heating assembly according to claim 1, characterized in that The first magnetic field generator and the receiving cavity are spaced apart along the axial direction.

3. The heating assembly according to claim 2, characterized in that Taking the end surface of the receiving cavity facing the proximal end as a reference surface, the spacing distance between the first magnetic field generator and the reference surface along the axial direction is greater than the spacing distance between the second magnetic field generator and the reference surface along the axial direction.

4. The heating assembly according to claim 1, characterized in that A partition is arranged between the heating chamber and the receiving chamber.

5. The heating assembly according to claim 4, characterized in that The spacer includes a protrusion formed on the inner surface of the tubular structure.

6. The heating assembly according to claim 4, characterized in that The second magnetic field generator and the spacing portion are spaced apart from each other along the axial direction.

7. The heating assembly according to claim 1, characterized in that It also includes a first temperature detection unit and a second temperature detection unit, wherein the first temperature detection unit is disposed in the first local area, and the second temperature detection unit is disposed in the second local area.

8. The heating assembly according to claim 1, characterized in that A bracket is also included for supporting the first magnetic field generator and the second magnetic field generator.

9. The heating assembly according to claim 8, characterized in that It also includes a heat insulating member arranged between the bracket and the sensor.

10. An aerosol generating device, characterized in that: It comprises a battery core for providing electric power and a heating component as claimed in any one of claims 1 to 9.

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