Aerosol-generating device

Abstract

The utility model discloses an aerosol generating device. The aerosol generating device comprises a first shell, a second shell and a heating body, a first accommodating space is defined by the first shell, the second shell is arranged in the first accommodating space, a second accommodating space is defined by the second shell, and the heating body is arranged in the second accommodating space; at least part of the second shell is of a hollowed-out structure, the hollowed-out structure comprises at least one through hole, and the heat conductivity coefficient of the space defined by each through hole is smaller than that of the second shell, so that the hollowed-out structure of the second shell forms a heat insulation barrier, and it can be ensured that most of heat generated by the heating body is isolated in the second containing space; heat transferred to the first shell is reduced, the problem that hands are scalded by the first shell is prevented, and the user experience is improved. Due to the fact that most of heat generated by the heating body is isolated in the second containing space, energy consumption of the heating body can be effectively reduced. The total area of the through holes accounts for 20%-70% of the total area of the second shell, and it is ensured that the second shell has enough structural strength.

Description

Technical Field

[0001] The utility model relates to the technical field of aerosol generation, in particular to an aerosol generating device. Background Art

[0002] Aerosol-generating devices in related technologies use heat generated by a heating element to atomize the aerosol-generating matrix. Due to the small size of the aerosol-generating device, this heat is transferred to the device's outer casing via heat conduction. The outer casing of some products can reach a maximum temperature of around 60°C, causing users to burn their hands when handling the aerosol-generating device, resulting in a poor user experience. Utility Model Content

[0003] The technical problem to be solved by the present invention is to provide an improved aerosol generating device.

[0004] The technical solution adopted by the utility model to solve the technical problem is: providing an aerosol generating device, which includes a first shell, a second shell and a heating element;

[0005] The first housing defines a first receiving space, the second housing is disposed in the first receiving space, the second housing defines a second receiving space, and the heating element is disposed in the second receiving space;

[0006] The second shell is at least partially a hollow structure, which includes at least one through hole. The thermal conductivity of the space defined by each through hole is smaller than the thermal conductivity of the second shell, and the total area of ​​the through holes accounts for 20% to 70% of the total area of ​​the second shell.

[0007] In some embodiments, the hollow structure includes a plurality of through holes arranged at intervals, and each of the through holes passes through the inside and the outside of the second receiving space.

[0008] In some embodiments, at least some of the through holes are arranged in an array.

[0009] In some embodiments, the second housing is a plastic housing.

[0010] In some embodiments, at least a portion of the through-holes are filled with aerogel.

[0011] In some embodiments, the second shell includes a first end wall, a second end wall and a side wall, the side wall is connected between the first end wall and the second end wall, the first end wall, the second end wall and the side wall together form the second receiving space, and the side wall is at least partially a hollow structure.

[0012] In some embodiments, the heating element is a cylindrical structure, which includes a circumferential wall, a first end face and a second end face, the circumferential wall is located between the first end face and the second end face, the first end face faces the first end wall, and the second end face faces the second end wall; the aerosol generating device also includes at least one of a first thermal insulation structure, a second thermal insulation structure and a third thermal insulation structure; wherein, the first thermal insulation structure is arranged between the first end face and the first end wall, the second thermal insulation structure is arranged between the second end face and the second end wall, and the third thermal insulation structure is arranged between the circumferential wall and the side wall.

[0013] In some embodiments, the heating element includes a base and a heating layer; the base is tubular, and the inner side of the base defines a heating cavity for accommodating an aerosol generating matrix; the heating layer is arranged on the tube wall of the base.

[0014] In some embodiments, the heating element further includes a protective layer, which is coated on the substrate, and the thickness of the protective layer is less than the thickness of the tube wall of the substrate, the thermal conductivity of the protective layer is lower than the thermal conductivity of the substrate, and the heating layer is at least partially located between the protective layer and the substrate; and / or, the substrate is capable of allowing infrared light to pass through, and the heating layer is capable of heating the aerosol generating matrix by radiating infrared light waves.

[0015] In some embodiments, the heating layer includes an infrared film and a heating film; the infrared film is arranged on the outer side of the ceramic substrate; the heating film is arranged on the infrared film, and the protective layer is covered on the heating film and the outer periphery of the infrared film; or, the infrared film is arranged on the inner side of the ceramic substrate, the heating film is arranged on the outer side of the ceramic substrate, and the protective layer is covered on the outer periphery of the heating film; or, the heating layer includes an infrared heating film that actively generates heat and radiates infrared light when powered on, and the infrared heating film is arranged on the outer side or inner side of the ceramic substrate.

[0016] This utility model has at least the following beneficial effects: the hollow structure of the second housing forms a thermal barrier. The excellent thermal insulation properties of the hollow structure ensure that the majority of the heat generated by the heating element is isolated within the second housing space, reducing heat transfer to the first housing and preventing the first housing from becoming too hot, thereby improving the user experience. Furthermore, since the majority of the heat generated by the heating element is isolated within the second housing space, the energy consumption of the heating element can be effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0018] Figure 1Schematic diagram of the structure of the aerosol generating device of some embodiments of the present invention;

[0019] Figure 2 This is a schematic diagram of the partial structure of the aerosol generating device of the first embodiment of the present utility model;

[0020] Figure 3 yes Figure 2 A schematic diagram of a vertical cross-sectional structure of an aerosol generating device shown;

[0021] Figure 4 yes Figure 2 A schematic structural diagram of the second shell of the aerosol generating device shown;

[0022] Figure 5 yes Figure 2 A schematic diagram of the exploded structure of the aerosol generating device shown;

[0023] Figure 6 2 is a schematic structural diagram of the second housing of the aerosol generating device according to the second embodiment of the present invention;

[0024] Figure 7 This is a partial structural diagram of an aerosol generating device according to a second embodiment of the present invention;

[0025] Figure 8 yes Figure 7 A schematic diagram of a vertical cross-sectional structure of an aerosol generating device shown;

[0026] Figure 9 yes Figure 7 A schematic structural diagram of the second shell of the aerosol generating device shown;

[0027] Figure 10 It is a schematic diagram of the partial structure of the heating element of some embodiments of the present utility model. DETAILED DESCRIPTION

[0028] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings.

[0029] like Figure 1As shown, an aerosol generating device according to an embodiment of the present invention includes a first shell 11, a second shell 12 and a heating element 2. The first shell 11 defines a first receiving space, the second shell 12 is arranged in the first receiving space, the second shell 12 defines a second receiving space, and the heating element 2 is arranged in the second receiving space. The first shell 11 can be used as a component that is directly held by the user. The second shell 12 is mainly used to accommodate and fix the heating element 2. The aerosol generating device also includes a battery 3 arranged in the first receiving space, and the battery 3 is located on one side of the second shell 12 and is used to supply power to the heating element 2. The heating element 2 encloses a heating chamber 20. The aerosol generating matrix can be arranged in the heating chamber 20. When the aerosol generating matrix is ​​arranged in the heating chamber 20, the heating element 2 is located on the periphery of the aerosol generating matrix. The heating element 2 generates heat when powered on, and the heat is transferred from the periphery of the aerosol generating matrix to the interior of the aerosol generating matrix. After the aerosol generating matrix is ​​heated, an aerosol is generated for the user to inhale.

[0030] like Figures 2 to 4 As shown, the second shell 12 is at least partially a hollow structure. That is, the second shell 12 can be a completely hollow structure, or a solid structure that is partially hollow and partially non-hollow. The hollow structure includes at least one through hole 120, and the thermal conductivity of the space defined by each through hole 120 is less than the thermal conductivity of the second shell 12. For example, in some embodiments, the second shell 12 can be a plastic shell, and the plastic can include at least one of polyetheretherketone (PEEK) and polycarbonate (PC). Each through hole 120 is filled with aerogel. Since the thermal conductivity of plastic is about 0.2W / (m·k) and the thermal conductivity of aerogel is 0.018W / (m·k), the difference between the thermal conductivity of the two is about ten times. The thermal conductivity in the space defined by each through hole 120 is much smaller than the thermal conductivity of the second shell 12, and most of the heat generated at the heating element 2 is conducted along the high-temperature end of the second shell 12 to the low-temperature end of the second shell 12, that is, as shown in FIG. Figure 3 As shown, heat is conducted from top to bottom in the second shell 12 along the direction of the longitudinal axis Y of the second shell 12. Thus, the hollow structure forms a heat insulation barrier. The excellent heat insulation performance of the hollow structure can ensure that most of the heat generated by the heating element 2 is isolated in the second receiving space, reducing the heat transfer to the first shell 11. After testing, after adopting the second shell 12 with a hollow structure, the temperature of the user's hand-held part (first shell 11) can be controlled below 48°C, and there will be no problem of being hot, thereby improving the user experience. At the same time, since most of the heat generated by the heating element 2 is isolated in the second receiving space, the energy consumption of the heating element 2 can be effectively reduced.

[0031] Of course, the second housing 12 is not limited to a plastic housing and can also be a housing made of other materials. The space defined by each through hole 120 is not limited to being filled with aerogel and can also be filled with air. The thermal conductivity of air is 0.025 W / (m·k). Air has a low thermal conductivity and weak thermal conductivity, so an air insulation barrier can also be established in the space defined by each through hole 120.

[0032] Since the second housing 12 is primarily used to house and secure the heating element 2, to ensure sufficient structural strength of the second housing 12, the total area of ​​the through holes 120 accounts for 20% to 70% of the total area of ​​the second housing 12. The total area of ​​the through holes 120 refers to the sum of the areas of all through holes 120. The total area of ​​the second housing 12 refers to the sum of the solid area of ​​the second housing 12 and the area of ​​the through holes 120, that is, the outer surface area of ​​the second housing 12 without the hollow structure.

[0033] like Figure 2 、 Figure 4 and Figure 6 In the illustrated embodiment, the hollow structure includes a plurality of through holes 120 arranged at intervals, and each through hole 120 passes through the inside and outside of the second receiving space. A plurality of through holes 120 refers to two or more through holes 120. However, in some other embodiments, the number of the through hole 120 may also be one. Moreover, at least some of the through holes 120 may be arranged in an array. That is, all of the through holes 120 may be arranged in an array on the second shell 12, or only a part of the through holes 120 may be arranged in an array on the second shell 12. The through holes 120 are arranged in an array on the second shell 12, which means that the intervals between adjacent through holes 120 are equal along at least two different directions.

[0034] Specifically, if Figure 4 and Figure 6 In the illustrated embodiment, the hollow structure includes a plurality of first through holes 1201 and second through holes 1202, wherein the area of ​​the first through holes 1201 is smaller than that of the second through holes 1202. The first through holes 1201 are arranged in an array. Specifically, along the circumference of the second housing 12, the spacing between adjacent first through holes 1201 is equal; along the longitudinal axis Y, the spacing between adjacent first through holes 1201 is also equal.

[0035] like Figure 4 and Figure 6 In the embodiment shown, the shapes and areas of the first through holes 1201 are the same. The shapes and sizes of the two second through holes 1202 are different. Figure 4 As shown in FIG. 1 , in the first embodiment, the first through hole 1201 is a circular hole, and the second through hole 1202 is a square hole. Figure 6As shown in FIG. 1 , in the second embodiment, the first through hole 1201 and the second through hole 1202 are both square holes. Figure 9 As shown, in the third embodiment, the hollow structure includes multiple through-holes 120 of varying areas, forming a frame structure for the entire second housing 12. The through-holes 120 are not limited to circular or square holes. In other embodiments, the through-holes 120 may also be triangular, elliptical, prismatic, polygonal, or the like. The outline of each through-hole 120 may be a straight line, a curve, or a combination of straight lines and curves. The shapes or areas of the through-holes 120 may be partially identical, entirely identical, or completely different.

[0036] like Figure 2 、 Figure 3 、 Figure 5 、 Figure 7 and Figure 8 As shown, in some embodiments, the second housing 12 includes a first end wall 121, a second end wall 122, and a side wall 123, with the side wall 123 connected between the first end wall 121 and the second end wall 122. The first end wall 121, the second end wall 122, and the side wall 123 together enclose a second receiving space. The side wall 123 is at least partially hollow. That is, at least a portion of the side wall 123 can be entirely or partially hollow. In other words, all through holes 120 extend through the interior and exterior of the second receiving space in a direction perpendicular to the longitudinal axis Y.

[0037] like Figure 3 and Figure 5 As shown, in some embodiments, the heating element 2 is a cylindrical structure with two ends extending therethrough. Specifically, the heating element 2 includes a circumferential wall surface 23, a first end surface 21, and a second end surface 22. The circumferential wall surface 23 is located between the first end surface 21 and the second end surface 22. The first end surface 21 faces the first end wall 121, and the second end surface 22 faces the second end wall 122.

[0038] like Figure 3 、 Figure 5 and Figure 8As shown, in some embodiments, the aerosol generating device further includes at least one of a first thermal insulation structure 61, a second thermal insulation structure 62, and a third thermal insulation structure 63. That is, in different embodiments of the aerosol generating device, one, two, or all of the first thermal insulation structure 61, the second thermal insulation structure 62, and the third thermal insulation structure 63 may be present. The first thermal insulation structure 61 is disposed between the first end face 21 and the first end wall 121, the second thermal insulation structure 62 is disposed between the second end face 22 and the second end wall 122, and the third thermal insulation structure 63 is disposed between the circumferential wall surface 23 of the heating element 2 and the side wall 123 of the second shell 12. The first thermal insulation structure 61, the second thermal insulation structure 62, and the third thermal insulation structure 63 serve as thermal insulation structures between the heating element 2 and the second shell 12 in three different directions, thereby reducing heat conduction between the heating element 2 and the second shell 12 and isolating most of the heat generated by the heating element 2 within the second receiving space.

[0039] Furthermore, the first thermal insulation structure 61 may include a first thermal insulation layer 611 and a first thermal insulation member 612, and the first thermal insulation member 612 is located between the first end face 21 and the first thermal insulation layer 611. The first thermal insulation layer 611 includes at least one of an aerogel layer and an air layer. The first thermal insulation member 612 includes at least one of ceramics and gas-phase glue. Gas-phase silica gel (abbreviated as gas-phase glue) is also called pure silica gel: it has a highly transparent appearance, a tensile strength of 7.8-10.0 MPa, an elongation of 500-1000%, and a tear strength of 29.4-49 KN / m; the thermal conductivity of gas-phase glue is 0.2 w / (m·k), which can play both a sealing role and a thermal insulation role, but the thermal insulation effect is worse than that of aerogel. The second thermal insulation structure 62 includes at least one of ceramics and gas-phase glue. The third thermal insulation structure 63 includes at least one of an aerogel layer and an air layer.

[0040] like Figure 2 and Figure 3 In the illustrated embodiment, the second housing 12 further includes an air outlet pipe 124, which is connected to the first end wall 121. Its air inlet end is connected to the heating chamber 20 defined by the heating element 2 within the second receiving space, and its air outlet end is connected to the exterior of the housing. An aerosol-generating substrate can be inserted into the heating chamber 20 through the air outlet pipe 124. The aerosol-generating substrate in the heating chamber 20 is heated and atomized, and the resulting aerosol flows out of the air outlet end of the air outlet pipe 124 for inhalation by the user. In other words, the aerosol generated in the heating chamber 20 flows from bottom to top.

[0041] Because the aerosol generated within the heating chamber 20 flows from bottom to top, the upper end of the second shell 12 (near the first end wall 121) is the high-temperature end, while the lower end (near the second end wall 122) is the low-temperature end. The first thermal insulation structure 61, located near the high-temperature end of the second shell 12, can be made of insulating ceramic. The second thermal insulation structure 62, located near the low-temperature end of the second shell 12, can be made of vapor-phase adhesive.

[0042] like Figure 1 As shown, in some embodiments, the aerosol generating device further includes a bracket 4 disposed in the first receiving space. The bracket 4 can be used to install components such as a battery 3 and a circuit board 8. The bracket 4 is located on one side of the second shell 12, and the side wall 123 abuts against the bracket 4 and the inner wall surface of the first shell 11 respectively, and the hollow structure is covered by the bracket 4 and the inner wall surface of the first shell 11. That is, the through holes 120 of the hollow structure are not directly connected to the first receiving space defined by the first shell 11, thereby ensuring that the medium (air or aerogel) in the space defined by the through holes 120 is stationary and does not flow, reducing the heat loss to the outside in the second receiving space. As a result, the air insulation barrier or aerogel insulation barrier defined by the through holes 120 of the hollow structure can isolate the heat of the heating element 2 in the second receiving space, and most of the heat can only be transferred from the high-temperature end of the second shell 12 to its low-temperature end, reducing the heat conducted to the first shell 11 and reducing the energy consumption of the heating element 2.

[0043] like Figure 10 As shown, in other embodiments, the heating element 2 includes a substrate 24, a protective layer 25 and a heating layer 26. The substrate 24 can be a heat-conducting material such as ceramics and glass. The substrate 24 is tubular and can allow infrared light to pass through. The inner side of the substrate 24 defines a heating chamber 20 for accommodating the aerosol generating matrix. The heating layer 26 is arranged on the tube wall of the substrate 24 and is used to radiate infrared light waves. The infrared light waves can pass through the substrate 24 to heat the aerosol generating matrix. The protective layer 25 is coated on the substrate 24, and the thickness of the protective layer 25 is less than the thickness of the tube wall of the substrate 24. The thermal conductivity of the protective layer 25 is lower than the thermal conductivity of the substrate 24, which can enhance the strength of the substrate 24 (especially the strength of the substrate 24 with a smaller thickness), ensure that the substrate 24 has sufficient strength to prevent falling and cracking, and further reduce the heat capacity of the substrate 24, so as to achieve the purpose of rapid heating and improve energy efficiency. Furthermore, the provision of the protective layer 25 allows the substrate 24 to be thinner, thereby increasing the infrared light transmission efficiency of the substrate 24, further improving energy efficiency. This also facilitates controlling the wall temperature of the substrate 24, keeping the temperature within 48 degrees Celsius. This also facilitates miniaturization of the heating element 2, thereby facilitating a miniaturized design of the entire aerosol generating device. The heating layer 26 is at least partially located between the protective layer 25 and the substrate 24.

[0044] Further, if Figure 10 As shown, in some embodiments, the heating layer 26 is a film structure, and the heating layer 26 includes an infrared film 261 and a heating film 262. The infrared film 261 is provided on the outer side of the substrate 24; specifically, the infrared film 261 can be coated, wrapped or printed on the outer side of the substrate 24. The infrared film 261 evenly covers the entire outer side of the substrate 24. The heating film 262 can be provided on the infrared film 261 in this embodiment, and can be formed on the infrared film 261 by wrapping or printing. The heating film 262 can be provided in a longitudinal direction and can extend along the circumference of the substrate 24. The protective layer 25 is coated on the periphery of the heating film 262 and the infrared film 261;

[0045] Alternatively, in some other embodiments, the infrared film 261 may be disposed on the inner side of the base 24 , the heating film 262 may be disposed on the outer side of the base 24 , and the protective layer 25 may be coated on the outer periphery of the heating film 262 .

[0046] Alternatively, in some other embodiments, the infrared film 261 and the heating film 262 are not limited to being independent film structures. The heating layer 26 may also be a conventional infrared heating film that actively generates heat and radiates infrared light when powered on. The infrared heating film may be disposed on the outer side or the inner side of the substrate 24. The heating layer 26 includes an infrared heating film that actively generates heat and radiates infrared light when powered on, and the infrared heating film is disposed on the outer side or the inner side of the substrate 24.

[0047] It can be understood that the above embodiments only express the preferred implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the present invention. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, all of which fall within the scope of protection of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should fall within the scope of coverage of the claims of the present invention.

Claims

1. An aerosol generating device, characterized in that It comprises a first shell (11), a second shell (12) and a heating element (2); The first shell (11) defines a first receiving space, the second shell (12) is arranged in the first receiving space, the second shell (12) defines a second receiving space, and the heating element (2) is arranged in the second receiving space; The second shell (12) is at least partially a hollow structure, the hollow structure includes at least one through hole (120), the thermal conductivity of the space defined by each through hole (120) is smaller than the thermal conductivity of the second shell (12), and the total area of ​​the through holes (120) accounts for 20% to 70% of the total area of ​​the second shell (12).

2. The aerosol generating device according to claim 1, wherein The hollow structure comprises a plurality of through holes (120) arranged at intervals, and each through hole (120) passes through the inside and outside of the second receiving space.

3. The aerosol generating device according to claim 2, wherein: At least some of the through holes (120) are arranged in an array.

4. The aerosol generating device according to claim 1, wherein The second shell (12) is a plastic shell.

5. The aerosol generating device according to claim 1, wherein: At least part of the through holes (120) are filled with aerogel.

6. The aerosol generating device according to claim 1, wherein: The second shell (12) comprises a first end wall (121), a second end wall (122) and a side wall (123); the side wall (123) is connected between the first end wall (121) and the second end wall (122); the first end wall (121), the second end wall (122) and the side wall (123) together enclose the second receiving space; and the side wall (123) is at least partially a hollow structure.

7. The aerosol generating device according to claim 6, wherein: The heating element (2) has a cylindrical structure, comprising a circumferential wall surface (23), a first end surface (21), and a second end surface (22); the circumferential wall surface (23) is located between the first end surface (21) and the second end surface (22); the first end surface (21) faces the first end wall (121), and the second end surface (22) faces the second end wall (122); The aerosol generating device further includes at least one of a first thermal insulation structure (61), a second thermal insulation structure (62) and a third thermal insulation structure (63); wherein the first thermal insulation structure (61) is arranged between the first end face (21) and the first end wall (121), the second thermal insulation structure (62) is arranged between the second end face (22) and the second end wall (122), and the third thermal insulation structure (63) is arranged between the circumferential wall surface (23) and the side wall (123).

8. The aerosol generating device according to any one of claims 1 to 7, characterized in that: The heating element (2) includes a base (24) and a heating layer (26); The substrate (24) is tubular, and the inner side of the substrate (24) defines a heating chamber (20) for accommodating an aerosol-generating substrate; The heating layer (26) is arranged on the tube wall of the base (24).

9. The aerosol generating device according to claim 8, characterized in that The heating element (2) further comprises a protective layer (25), the protective layer (25) being coated on the base (24), the thickness of the protective layer (25) being smaller than the wall thickness of the base (24), the thermal conductivity of the protective layer (25) being lower than the thermal conductivity of the base (24), and the heating layer (26) being at least partially located between the protective layer (25) and the base (24); And / or, the base (24) is capable of transmitting infrared light, and the heating layer (26) is capable of heating the aerosol-generating matrix by radiating infrared light waves.

10. The aerosol generating device according to claim 9, characterized in that The heating layer (26) comprises an infrared film (261) and a heating film (262); the infrared film (261) is arranged on the outer side of the substrate (24); the heating film (262) is arranged on the infrared film (261), and the protective layer (25) is coated on the outer periphery of the heating film (262) and the infrared film (261); Alternatively, the infrared film (261) is arranged on the inner side of the base (24), the heating film (262) is arranged on the outer side of the base (24), and the protective layer (25) is coated on the outer periphery of the heating film (262); Alternatively, the heating layer (26) includes an infrared heating film that actively generates heat and radiates infrared light when powered on, and the infrared heating film is arranged on the outer side or the inner side of the base (24).

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