Aerosol generation device and heating assembly therefor

Abstract

The present application relates to an aerosol generating device and a heating assembly thereof, the heating assembly comprising a heating element, the heating element comprising a substrate and a heating layer disposed on the substrate, the substrate comprising a first end and a second end opposite to the first end; the heating assembly further comprising two fixing structures, each of the two fixing structures being connected to the first end and the second end respectively, and the thermal conductivity of each of the two fixing structures being lower than that of the substrate. In the present application, since the thermal conductivity of the fixing structures is lower than or equal to that of the substrate, and each of the fixing structures is manufactured separately from the substrate, when the heating assembly is assembled, the heat on the heating element can be effectively reduced from being transferred outwardly through the first end and the second end of the substrate.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of heating non-combustion appliances, more particularly, to an aerosol generating device and a heating assembly thereof. BACKGROUND

[0002] An aerosol generating device is an electronic device for generating an aerosol by heating but not combusting an aerosol generating substrate (a solid substrate such as a plant leaf product such as tobacco). The core component of the aerosol generating device is a heating assembly that heats the aerosol generating substrate to a temperature at which the aerosol generating substrate can generate an aerosol but is not combusted, thereby allowing the aerosol generating substrate to generate an aerosol required by a user without combustion.

[0003] In the related art, both ends of the heating assembly are directly fixed to the support, and the heat of the heating element assembly is directly conducted outward from the support, resulting in a large heat loss and a high energy consumption of the heating element assembly. SUMMARY

[0004] The present application aims to provide an improved aerosol generating device and a heating assembly thereof.

[0005] The technical solution adopted by the present application to solve the technical problem is as follows: a heating assembly for an aerosol generating device, comprising:

[0006] a heating element comprising a base and a heating layer provided on the base, the base comprising a first end and a second end opposite to the first end; and

[0007] two fixing structures connected to the first end and the second end respectively, each fixing structure having a thermal conductivity lower than or equal to that of the base, and each fixing structure being separately made from the base.

[0008] In some embodiments, the base is in a cylindrical shape.

[0009] In some embodiments, each fixing structure is in a cylindrical shape.

[0010] In some embodiments, the two fixing structures are connected to the first end and the second end respectively along an axial direction.

[0011] In some embodiments, the two fixing structures are connected to the first end and the second end respectively by sleeving.

[0012] In some embodiments, end faces of the two fixing structures are connected to end faces of the first end and the second end respectively.

[0013] In some embodiments, the end faces of the two fixing structures are respectively welded with the end faces of the first end and the second end.

[0014] In some embodiments, the heat generating layer comprises a resistive film layer.

[0015] In some embodiments, the heat generating layer comprises two heat generating layers, the two heat generating layers are in a spiral shape and are arranged along the axial direction of the base body to respectively heat the first end and the second end.

[0016] In some embodiments, the heating assembly further comprises two supports, the two supports are respectively connected with the two fixing structures.

[0017] In some embodiments, the two supports and the two fixing structures are in a cylindrical shape, the two fixing structures are respectively embedded in the two supports along the axial direction.

[0018] In some embodiments, the two fixing structures each comprise a cylindrical sleeve segment and a cylindrical recess segment connected with the sleeve segment along the axial direction, the recess segments of the two fixing structures are respectively embedded in the two supports along the axial direction.

[0019] In some embodiments, the base body is made of a metal material, and the heat generating element further comprises an insulating layer arranged between the base body and the heat generating layer.

[0020] In some embodiments, the heat generating element further comprises a protective layer covering the outer surface of the heat generating layer.

[0021] The application further provides an aerosol generating device comprising the heating assembly.

[0022] The application has the following beneficial effects: since the thermal conductivity of the fixing structure is lower than or equal to the thermal conductivity of the base body, and each fixing structure is separately made from the base body, when the heating assembly is assembled and matched, the heat on the heat generating element can be effectively reduced from being transferred to the outside through the first end and the second end of the base body. BRIEF DESCRIPTION OF DRAWINGS

[0023] The application will be further described below with reference to the drawings and embodiments, wherein:

[0024] Figure 1 is a schematic view of the aerosol generating device in some embodiments of the application;

[0025] Figure 2 is Figure 1 is a schematic view of the heating assembly of the aerosol generating device shown in the figure;

[0026] Figure 3 is Figure 2A sectional view of the heating assembly shown;

[0027] Figure 4 is Figure 2 A partial enlarged view of the fixing structure of the heating assembly shown;

[0028] Figure 5 is Figure 2 An exploded structural view of the heating element of the heating assembly shown;

[0029] Figure 6 is a sectional view of the heating assembly in another embodiment of the present application;

[0030] Figure 7 is Figure 6 An exploded structural view of the heating element of the heating assembly shown. DETAILED DESCRIPTION

[0031] In order to have a clearer understanding of the technical features, objectives and effects of the present application, the specific embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0032] In the description of the present application, it should be understood that the terms "longitudinal", "axial", "length", "width", "upper", "lower", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship commonly used when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0033] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "plurality" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0034] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] Figure 1 An aerosol generating device 1 and an aerosol generating substrate 2 detachably inserted into one end of the aerosol generating device 1 in some embodiments of the present application are shown. The aerosol generating device 1 can be in a square column shape in some embodiments to facilitate a user to hold it, and it can perform low-temperature baking heating on the aerosol generating substrate 2 inserted therein to release aerosol extract in the aerosol generating substrate 2 in a non-combustion state. The aerosol generating substrate 2 can be in a cylindrical shape in some embodiments, and it can include a processed plant leaf solid aerosol generating substrate. Understandably, the aerosol generating device 1 is not limited to a square column shape, and it can also be in a cylindrical shape, an elliptical column shape, or other shapes in other embodiments.

[0036] The aerosol generating device 1 can include a heating assembly 10 and a housing 20 for carrying the heating assembly 10 in some embodiments. The heating assembly 10 can be in a cylindrical shape in some embodiments, and the aerosol generating substrate 2 can be detachably inserted therein to perform heating baking on the aerosol generating substrate 2 from the periphery. The aerosol generating device 1 can also include a battery (not shown) disposed in the housing 20 in some embodiments. The battery is electrically connected to the heating assembly 10 to supply power to the heating assembly 10.

[0037] Referring to Figure 2 and Figure 4 The heating assembly 10 can include a heating element 11, two fixing structures 12 respectively connected to a base body 111 of the heating element 11 in an axial direction, and two cylindrical supports 13 in some embodiments. The two fixing structures 12 can be respectively embedded in the two supports 13 in an axial direction in some embodiments. The two fixing structures 12 are made of a material with small heat capacity and low thermal conductivity, such as PEEK or ceramic material. The thermal conductivity of each fixing structure 12 is lower than that of the base body 111 of the heating element 11. The two fixing structures 12 can be used to fix the heating element 11 and also can reduce the heat transfer of the base body 111 outward. In some embodiments, the base body 111 and the fixing structure 12 can also be made of stainless steel. Since the base body 111 and the fixing structure 12 are manufactured separately, the assembly fit can reduce heat transfer compared to integral molding. In addition, the thickness of the fixing structure 12 can be greater than the thickness of the base body 111.

[0038] As Figure 5As shown, the heating element 11 can be cylindrical in some embodiments, which can include a base 111 made of a metal material, an insulation layer 112 disposed on the outer surface of the base 111, a heating layer 113 disposed on the outer surface of the insulation layer 112, and a protective layer 114 covering the outer surface of the heating layer 113. The base 111 is used to improve the uniformity of the temperature distribution field of the heating element 11, and the heating layer 113 is used to heat the aerosol generating substrate when powered on. The insulation layer 112 can be formed by one of dip coating, sintering, magnetron sputtering, and spraying in some embodiments, which covers the outer surface of the base 111 and is used to prevent the base 111 from conducting with the heating layer 113. The protective layer 114 can reduce the erosion of oxygen and impurities on the heating layer 113, and prolong the service life of the heating layer 113. In some embodiments, the insulation layer 112 can be a ceramic film formed by a flow casting process, and the heating layer 113 is printed on the insulation layer 112, and then the ceramic film and the heating layer 113 are sintered on the base 111. The protective layer 114 can be a glass glaze layer in some embodiments.

[0039] It can be understood that the base 111 is not limited to be cylindrical, but can also be square cylindrical, regular polygonal cylindrical, or other cylindrical shapes. It can also be understood that the base 111 is not limited to be cylindrical, but can also be in other shapes such as a sheet. It can be understood that when the base 111 is made of a non-metal material such as a heat-conducting ceramic, the insulation layer 112 can also not be provided.

[0040] The base 111 can include a first end 1101 and a second end 1102 opposite to the first end 1101 in some embodiments, and the two fixing structures 12 are respectively connected to the first end 1101 and the second end 1102 along the axial direction.

[0041] The heating layer 113 can include two in some embodiments, which can be spiral-shaped resistive film layers, and the two heating layers 113 are arranged along the axial direction of the base 111 to heat the first end 1101 and the second end 1102, respectively.

[0042] The fixing structure 12 can be in a cylindrical shape in some embodiments, and can be made of a material with low heat capacity and low thermal conductivity. In some embodiments, the fixing structure can include two sleeve segments 121 in a cylindrical shape and two recess segments 122 axially connected to the two sleeve segments respectively. The two sleeve segments 121 are axially sleeved on the first end 1101 and the second end 1102 of the base 111 respectively, and the inner diameter of the sleeve segment 121 matches the outer diameter of the base 111. The two recess segments 122 are axially embedded on the two supports 13 respectively. It can be understood that the fixing structure 12 is not limited to a cylindrical shape, and can also be in a square tube shape, a regular polygon tube shape, or other tube shapes. It can also be understood that the fixing structure 12 is not limited to a tube shape, and can also be in a sheet shape or other shapes.

[0043] Figure 6 A heating assembly 10a in another embodiment of the present application is shown. The heating assembly 10a can include a heating element 11a, two fixing structures 12a axially connected to the base 111a of the heating element 11a respectively, and two cylindrical supports 13a in some embodiments. The two fixing structures 12a can be axially embedded in the two supports 13a respectively in some embodiments. The two fixing structures are made of a material with low heat capacity and low thermal conductivity. The thermal conductivity of each fixing structure 12a is lower than that of the base 111a of the heating element 11a. The two fixing structures 12a can be used to fix the heating element 11a, and can also reduce the heat transfer of the base 111a outward. In some embodiments, the base 111a and the fixing structure 12a can also be made of stainless steel. Since the base 111a and the fixing structure 12a are manufactured separately, the heat transfer can be reduced compared to integrated manufacturing and assembly.

[0044] For reference Figure 7In some embodiments, the heating element 11a can be in a cylindrical shape, which can include a base 111a in a cylindrical shape and made of a metal material, an insulation layer 112a disposed on the outer surface of the base 111a, a heating layer 113a disposed on the outer surface of the insulation layer 112a, and a protective layer 114a covering the outer surface of the heating layer 113a. The base 111a is used to improve the uniformity of the temperature distribution field of the heating element 11a, and the heating layer 113a is used to heat the aerosol generating substrate when powered on. In some embodiments, the insulation layer 112a can be formed by one of dip coating, sintering, magnetron sputtering, and spraying, and covers the outer surface of the base 111a to prevent the base 111a from being in conduction with the heating layer 113a. The protective layer 114a can reduce the erosion of oxygen and impurities on the heating layer 113a, thereby prolonging the service life of the heating layer 113a. In some embodiments, the insulation layer 112a can be a ceramic film formed by a flow casting process, the heating layer 113a is printed on the ceramic film after the ceramic film is wound on the base 111a with the heating layer 113a on the side opposite to the base 111a, and then the ceramic film and the heating layer 113a are sintered on the base 111a. In some embodiments, the protective layer 114a can be a glass glaze layer.

[0045] It can be understood that the base 111a is not limited to a cylindrical shape, but can also be in other cylindrical shapes such as a square tube shape or a regular polygon tube shape. It can also be understood that the base 111a is not limited to a cylindrical shape, but can also be in other shapes such as a sheet shape. It can be understood that when the base 111a is made of a non-metal material such as a heat-conducting ceramic, the insulation layer 112a can also not be provided.

[0046] In some embodiments, the heating layer 113a can include two heating layers 113a, which can be in a spiral shape and arranged along the axial direction of the base 111a to heat the first end 1101a and the second end 1102a of the base 111a, respectively. It can be understood that the heating layer 113a can also be in other shapes.

[0047] The heating assembly 10a can be an alternative to the heating assembly 10, which is different from the first embodiment in that the base 111a can include a first end 1101a and a second end 1102a opposite to the first end 1101a in some embodiments, and the end faces of the two fixing structures 12a are respectively connected to the end faces of the first end 1101a and the second end 1102a. In other embodiments, the end faces of the two fixing structures 12a can be respectively welded to the end faces of the first end 1101a and the second end 1102a.

[0048] It can be understood that the above embodiments only express the preferred embodiments of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the patent scope of the present application; it should be pointed out that for ordinary skilled in the art, the above technical features can be freely combined without departing from the concept of the present application, and several modifications and improvements can be made, which belong to the protection scope of the present application; therefore, any equivalent transformation and modification made with the patent claim scope of the present application shall belong to the coverage of the patent claim of the present application.

Claims

1. A heating assembly for an aerosol generating device, characterized in that, include: A heating element, the heating element comprising a substrate and a heating layer disposed on the substrate, the substrate comprising a first end and a second end opposite to the first end; as well as Two fixed structures are connected to the first end and the second end respectively. The thermal conductivity of each fixed structure is lower than or equal to the thermal conductivity of the substrate, and each fixed structure is made separately from the substrate. Two brackets, and the two fixing structures are respectively embedded in the two brackets along the axial direction; The two fixing structures each include a sleeve section and a recessed section axially connected to the sleeve section. The two sleeve sections are respectively axially sleeved on the first end and the second end of the base. The recessed sections of the two fixing structures are respectively axially embedded in the two brackets.

2. The heating assembly according to claim 1, characterized in that, The substrate is cylindrical.

3. The heating assembly according to claim 2, characterized in that, Each fixed structure is cylindrical.

4. The heating assembly according to claim 3, characterized in that, The two fixed structures are respectively connected to the first end and the second end along the axial direction.

5. The heating assembly according to claim 4, characterized in that, The two fixed structures are respectively connected to the first end and the second end.

6. The heating assembly according to claim 4, characterized in that, The end faces of the two fixed structures are respectively connected to the end faces of the first end and the second end.

7. The heating assembly according to claim 6, characterized in that, The end faces of the two fixed structures are welded to the end faces of the first end and the second end, respectively.

8. The heating assembly according to claim 1, characterized in that, The heating layer includes a resistive film layer.

9. The heating assembly according to claim 1, characterized in that, The heating layer comprises two layers, which are spirally arranged and spaced apart along the axial direction of the substrate to heat the first end and the second end respectively.

10. The heating assembly according to claim 1, characterized in that, The two supports and the two fixing structures are all cylindrical, and the sleeve section and the recessed section are both cylindrical.

11. The heating assembly according to claim 1, characterized in that, The substrate is made of a metallic material, and the heating element further includes an insulating layer disposed between the substrate and the heating layer.

12. The heating assembly according to claim 11, characterized in that, The heating element also includes a protective layer covering the outer surface of the heating layer.

13. An aerosol generating device, characterized in that, Includes the heating assembly as described in any one of claims 1 to 12.

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