Aerosol generating device and heating assembly

Abstract

The utility model relates to an aerosol generating device and a heating assembly, the heating assembly comprises: a tubular ceramic substrate capable of transmitting infrared light, the inner side of which defines an accommodating cavity for accommodating an aerosol generating substrate; the protective layer is coated on the ceramic substrate, the thickness of the protective layer is smaller than that of the pipe wall of the ceramic substrate, and the thermal conductivity of the protective layer is lower than that of the ceramic substrate; the heating layer is arranged on the ceramic substrate and can heat the aerosol generating substrate by radiating infrared light waves, and at least part of the heating layer is located between the protective layer and the ceramic substrate. According to the heating layer of the heating assembly, the protective layer with the thermal conductivity lower than that of the ceramic substrate is arranged on the ceramic substrate, so that the strength of the ceramic substrate can be enhanced, it is guaranteed that the ceramic substrate has enough falling-cracking-preventing strength, the heat capacity of the ceramic substrate is further reduced, the purpose of rapid heating is achieved, energy efficiency is improved, the ceramic substrate is thinned, and the service life of the ceramic substrate is prolonged. The transmission efficiency of infrared light waves can be increased, and the energy efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to the field of atomization, in particular to an aerosol generating device and a heating component. Background Art

[0002] In related art, aerosol generating devices using infrared heating technology utilize a heating element made of a tubular quartz substrate with a heating layer disposed on the quartz substrate's wall. This heating element heats the aerosol-generating matrix through infrared radiation and / or thermal conduction, generating aerosol. However, this quartz substrate-based heating element consumes a high amount of energy. Utility Model Content

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

[0004] The technical solution adopted by the utility model to solve the technical problem is to construct a heating component, including:

[0005] A tubular ceramic substrate that is transparent to infrared light and defines a cavity inside for accommodating the aerosol generating matrix;

[0006] a protective layer coated on the ceramic substrate, wherein the thickness of the protective layer is less than the wall thickness of the ceramic substrate, and the thermal conductivity of the protective layer is lower than the thermal conductivity of the ceramic substrate;

[0007] The heating layer is arranged on the tube wall of the ceramic substrate and can heat the aerosol generating matrix by radiating infrared light waves; the heating layer is at least partially located between the protective layer and the ceramic substrate.

[0008] In some embodiments, the transmittance of the ceramic substrate to infrared light with a wavelength of 0-6.5 μm is greater than or equal to 50%;

[0009] And / or, the thickness of the protective layer is 10-50 μm, and the thickness of the tube wall of the ceramic substrate is equal to or less than 1 mm.

[0010] In some embodiments, the ratio of the thermal conductivity of the ceramic substrate to the thermal conductivity of the protective layer is greater than or equal to 6; or, the thermal conductivity of the ceramic substrate is greater than or equal to 10 W / mK; or, the thermal conductivity of the protective layer is less than or equal to 1.5 W / mK.

[0011] In some embodiments, the thermal expansion coefficient of the ceramic matrix is ​​greater than or equal to 5pp; and / or the bending strength of the ceramic matrix is ​​greater than or equal to 100 MPa.

[0012] In some embodiments, the infrared emissivity of the protective layer to a wavelength of 1-10 μm is less than or equal to 0.5.

[0013] In some embodiments, the ceramic substrate includes a first end surface and a second end surface disposed opposite to each other in the axial direction, and an outer side surface disposed between the first end surface and the second end surface;

[0014] The protective layer covers the outer side surface and covers the first end surface and / or the second end surface.

[0015] In some embodiments, the heating layer includes an infrared film and a heating film;

[0016] 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 coated on the periphery of the heating film and the infrared film;

[0017] Alternatively, the heating layer includes an infrared film and a heating film, 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 coated on the periphery of the heating film;

[0018] Alternatively, the heating layer includes an infrared heating film that actively generates heat and radiates infrared light when powered on, the infrared heating film is arranged on the outer side or inner side of the ceramic substrate, and the protective layer is coated on the infrared heating film.

[0019] The utility model also constructs an aerosol generating device, comprising a housing, and the heating component of the utility model arranged in the housing;

[0020] The shell is provided with an inserting port, which is communicated with the accommodating cavity of the heating component and is used for inserting the aerosol generating matrix.

[0021] In some embodiments, the aerosol generating device further comprises a first heat insulating structure provided at one end of the heating component, wherein the first heat insulating structure is provided at one end of the heating component facing the plug port.

[0022] In some embodiments, the first thermal insulation structure includes a hollow tubular sleeve portion and a partition portion; the sleeve portion is docked or sleeved on the heating component, and the partition portion is arranged on one side of the sleeve portion and extends toward the plug-in port.

[0023] In some embodiments, the first thermal insulation structure is thermal insulation ceramic, and its thermal conductivity is less than 5W / mK.

[0024] In some embodiments, the aerosol generating device further comprises aerogel or gas-phase glue arranged on the first thermal insulation structure, and the aerogel or gas-phase glue is located on a side of the partition portion away from the accommodating cavity.

[0025] In some embodiments, the aerosol generating device further comprises a sealing ring, which is disposed on the aerogel or aerosol glue and faces one side of the plug-in port.

[0026] In some embodiments, the insulation assembly includes a second insulation structure,

[0027] The second heat insulation structure is arranged at an end of the heating component away from the plug port.

[0028] In some embodiments, the insulation assembly includes a third insulation structure,

[0029] The third heat insulation structure is arranged on the outer periphery of the heating component.

[0030] In some embodiments, the aerosol generating device includes a reflective structure, and the reflective structure is sleeved on the periphery of the heating component;

[0031] And / or, the third heat insulation structure includes a gap provided on the periphery of the heat generating component;

[0032] And / or, the third thermal insulation structure includes at least two thermal insulation layers arranged on the periphery of the heating component, and the thermal insulation layers are aerogel and / or vapor phase glue.

[0033] The implementation of the aerosol generating device and heating component of the utility model has the following beneficial effects: the heating component is provided with a heating layer that radiates infrared light waves on an infrared-transparent ceramic substrate, and the heating layer is at least partially provided between the protective layer and the ceramic substrate, and a protective layer is provided on the ceramic substrate with a thickness less than the thickness of the ceramic substrate tube wall and a thermal conductivity lower than the thermal conductivity of the ceramic substrate, thereby enhancing the strength of the ceramic substrate (especially the strength of the ceramic substrate with a smaller thickness), ensuring that the ceramic substrate has sufficient strength to prevent falling and cracking, and further reducing the heat capacity of the ceramic substrate, thereby achieving the purpose of rapid heating and improving energy efficiency. The thinning of the ceramic substrate can also increase the transmission efficiency of infrared light waves, further improving energy efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0035] Figure 1 It is a structural diagram of the aerosol generating device in the first embodiment of the present utility model;

[0036] Figure 2 yes Figure 1 Schematic diagram of the local structure of the aerosol generating device and the assembly of the aerosol generating matrix;

[0037] Figure 3 yes Figure 2 A schematic diagram of the structure of the heating component of the aerosol generating device shown;

[0038] Figure 4 yes Figure 3 a cross-sectional view of a heating component of the aerosol generating device;

[0039] Figure 5 yes Figure 4 An enlarged schematic diagram of the local structure of the heating component of the aerosol generating device shown;

[0040] Figure 6 This is a schematic structural diagram of a heating component of an aerosol generating device in a second embodiment of the present invention;

[0041] Figure 7 yes Figure 6 a cross-sectional view of a heating component of the aerosol generating device;

[0042] Figure 8 This is a schematic structural diagram of a heating component of an aerosol generating device in a third embodiment of the present invention;

[0043] Figure 9 yes Figure 8 a cross-sectional view of a heating component of the aerosol generating device;

[0044] Figure 10 yes Figure 9 An enlarged schematic diagram of a local structure of a heating component of an aerosol generating device is shown;

[0045] Figure 11 This is a schematic structural diagram of an aerosol generating device in a fourth embodiment of the present invention;

[0046] Figure 12 Figure 11 a cross-sectional view of the aerosol generating device shown;

[0047] Figure 13 is a cross-sectional view of an aerosol generating device in a fifth embodiment of the present invention;

[0048] Figure 14 yes Figure 13 A partial structural cross-sectional view of the aerosol generating device shown;

[0049] Figure 15 This is a cross-sectional view of the local structure of the aerosol generating device and the assembly of the aerosol generating substrate in the sixth embodiment of the present invention. DETAILED DESCRIPTION

[0050] In order to provide a clearer understanding of the technical features, objectives, and effects of the present invention, a specific embodiment of the present invention is now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "upper," "inner," "outer," etc. are based on the directions or positional relationships shown in the accompanying drawings and are constructed and operated in specific directions. These directions are merely for the purpose of facilitating the description of the present invention and do not require that the devices or components referred to have specific directions. Therefore, they should not be construed as limitations on the present invention.

[0051] It should also be noted that, unless otherwise clearly specified and limited, terms such as "installation", "connection", and "setting" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intervening elements. The terms "first", "second", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of such features. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0052] Figure 1 and Figure 2 The first embodiment of the aerosol-generating device of the present invention is shown. The aerosol-generating device 100 heats the aerosol-generating substrate 200 using a heat-without-combustion method. Specifically, the aerosol-generating device 100 heats the aerosol-generating substrate 200 via infrared radiation. In this embodiment, the aerosol-generating substrate 200 can be cylindrical or tubular, and can be a solid material in the form of strips, sheets, granules, or integrally formed from leaves and / or stems of plants (e.g., tobacco). Fragrance components can also be added to this solid material.

[0053] In this embodiment, the aerosol generating device 100 may include a housing 10, a fixing assembly 20, and a heating assembly 30. The housing 10 is used to accommodate the fixing assembly 20, which can be used to fix the heating assembly 30. The heating assembly 30 is disposed in the fixing assembly 20 and is then fixed to the housing 10 by the fixing assembly 20. The heating assembly 30 can be sleeved around the periphery of the aerosol generating matrix 200 and can heat the aerosol generating matrix 200 by radiating infrared light waves, so that the aerosol generating matrix 200 generates an aerosol for the user to inhale. In this embodiment, the aerosol generating device 100 may also include a power supply assembly, which can be electrically connected to the heating assembly 30 to supply power to the heating assembly 30.

[0054] In this embodiment, the housing 10 may be substantially cylindrical and hollow inside. The housing 10 may be provided with an insertion port 11 for partially inserting the aerosol generating matrix 200 into the heating element 30 .

[0055] In the present embodiment, the fixing assembly 20 may include a fixing base 21 and a fixing sleeve 22. The fixing base 21 is used to fix the heating component 30. The heating component 30 can be inserted into the fixing base 21 and fixed by interference fit with the fixing base 21. In some other embodiments, it may not be limited to being fixed with the fixing base 21 by interference fit, and may also be fixed by screwing or clamping. An air flow channel 211 may be provided on the fixing base 21, and the air flow channel 211 may extend along the axial direction of the fixing base 21 and then be connected to the outside. External gas can enter the heating component 30 through the air flow channel 211 and bring out the aerosol generated by the aerosol generating matrix 200. The fixing sleeve 22 is sleeved on the fixing base 21 and on the outer periphery of the heating component 30. It can be coaxially arranged with the fixing base 21, and the inner side is a hollow structure. An opening 221 is provided at one end away from the fixing base 21, which is coaxial with and connected to the plug-in port 11. At least part of the aerosol generating matrix 200 can be inserted into the heating component 30 through the plug-in port 11 and the opening 221.

[0056] like Figures 3 to 5As shown, in this embodiment, the heating component 30 may include a ceramic substrate 31, a heating layer 32 and a protective layer 33. The ceramic substrate 31 is tubular and can be transmitted by infrared light. The heating layer 32 is arranged on the tube wall of the ceramic substrate 31, and the protective layer 33 is arranged outside the heating layer 32. The heating layer 32 is at least partially located between the protective layer 33 and the ceramic substrate 31, and is used to radiate infrared light waves. The infrared light waves can pass through the ceramic substrate 31 to heat the aerosol generating matrix 200. The protective layer 33 can be arranged on the outer periphery of the ceramic substrate 31, and its thermal conductivity is lower than that of the ceramic substrate 31. On the one hand, the protective layer 33 can enhance the strength of the ceramic substrate 31 (in actual application, in order to pursue high transmittance of infrared light and low heat capacity of the ceramic substrate, it is necessary to appropriately reduce the thickness of the tube wall of the ceramic substrate), ensure that the ceramic substrate 31 has sufficient strength to prevent falling and cracking, and can also reduce the heat capacity of the ceramic substrate 31, so as to achieve the purpose of rapid heating and improve energy efficiency. On the other hand, by providing the protective layer 33, the ceramic substrate can be appropriately thinned, thereby increasing the transmittance efficiency of the ceramic substrate 31 to infrared light waves, further improving energy efficiency; furthermore, it is also beneficial to control the tube wall temperature of the ceramic substrate 31, which is beneficial to controlling the temperature within an appropriate temperature, such as 48 degrees Celsius, and is also beneficial to the miniaturization design of the heating component 30, and further beneficial to the miniaturization and low-energy consumption design of the entire aerosol generating device 100.

[0057] In this embodiment, the ceramic substrate 31 is generally tubular and can be transparent. The ceramic substrate 31 is a through-hole structure, with its inner side defining a housing cavity 310 that can be used to accommodate at least a portion of the aerosol-generating matrix 200. In this embodiment, the thickness of the ceramic substrate 31 is less than that of a quartz tube in the prior art. Specifically, the wall thickness of the ceramic substrate 31 is less than or equal to 1 mm. Furthermore, it can be less than or equal to 0.8 mm, for example, 0.8 mm, 0.7 mm, 0.6 mm, 0.5 mm, or 0.4 mm. In other words, the wall thickness of the ceramic substrate 31 can be thinned, thereby increasing the transmittance of infrared light waves, reducing heat capacity, and thus improving energy efficiency. However, the thinner the tube wall of the ceramic substrate 31 is, the better. If it is too thin, the heat capacity will be too small, resulting in insufficient baking of the aerosol generating matrix 200, and some flavors cannot be effectively released, affecting the taste. Therefore, the tube wall thickness of the ceramic substrate 31 is preferably 0.4mm-0.8mm (including the endpoint values).

[0058] In some embodiments, the ceramic base 31 may include a first end face 311, a second end face 312, an outer side face 313, and an inner side face 314. The first end face 311 and the second end face 312 are disposed opposite each other, and the second end face 312 and the first end face 311 may be disposed opposite each other along the axial direction of the ceramic base 31; that is, the first end face 311 is disposed near the plug port 11. In some embodiments, the first end face 311 and the second end face 312 may be annular end faces. The outer side face 313 and the inner side face 314 are disposed between the first end face 311 and the second end face 312, and the outer side face 313 and the inner side face 314 are disposed opposite each other.

[0059] In this embodiment, the transmittance of the ceramic substrate 31 to infrared light with a wavelength of 0-6.5 μm is greater than or equal to 50%. After heating, the ceramic substrate 31 itself can radiate infrared light waves, and the wavelength of the infrared light waves radiated is mainly 8-11 μm (more than 50%).

[0060] In this embodiment, the ratio of the thermal conductivity of the ceramic substrate 31 to the thermal conductivity of the protective layer 33 is greater than or equal to 6. Specifically, the thermal conductivity of the ceramic substrate 31 is greater than or equal to 10 W / mK, thereby facilitating rapid heat transfer to the aerosol generating substrate 200 and thereby improving the heating efficiency of the aerosol generating substrate 200. Furthermore, in some embodiments, the ceramic substrate 31 may be made of a ceramic material with a relatively high thermal conductivity, such as greater than or equal to 30 W / mK. In some embodiments, the ceramic material selected for the ceramic substrate 31 may include aluminum oxide, spinel, yttrium oxide, zirconium oxide, magnesium oxide, beryllium oxide, gallium arsenide, zinc sulfide, zinc selenide, magnesium fluoride, calcium fluoride, and the like. For example, the ceramic substrate 31 may be made of aluminum oxide, wherein the aluminum oxide has a purity of greater than or equal to 99% and a density of greater than or equal to 99% (density = measured density / true density*100%).

[0061] In this embodiment, the flexural strength of the ceramic substrate 31 is greater than or equal to 100 MPa. It should be noted that flexural strength refers to the maximum stress a material can withstand when subjected to a bending load, either before it breaks or when a specified bending moment is reached. The thickness of the ceramic substrate 31 can be appropriately reduced to reduce heat capacity, increase the heating rate, and thus reduce energy consumption.

[0062] In this embodiment, the thermal expansion coefficient of the ceramic substrate 31 is greater than or equal to 5pp. By selecting the ceramic substrate 31 with a thermal expansion coefficient greater than or equal to 5pp, it is more conducive to the thermal expansion matching of the ceramic substrate 31 and the heating layer 32 and / or the protective layer 33, thereby improving the high-temperature reliability of the ceramic substrate 31 and / or the protective layer 33.

[0063] In this embodiment, the heating layer 32 is a membrane structure, which can be coated on the surface of the ceramic base 31. Specifically, the heating layer 32 may include an infrared film 321 and a heating film 322. The infrared film 321 is arranged on the outer side 313 of the ceramic base 31. Specifically, the infrared film 321 can be coated, coated or printed on the outer side of the ceramic base 31. The infrared film 321 evenly covers the entire outer side of the ceramic base 31. The heating film 322 can be arranged on the infrared film 321 in this embodiment, and can be formed on the infrared film 321 by coating or printing. The heating film 322 can be arranged longitudinally, and can extend along the circumference of the ceramic base 31, and can be a strip-shaped track. In some embodiments, the heating layer 32 also includes a conductive film 323. There can be two conductive films 323. The two conductive films 323 can be arranged on the infrared film 321 at intervals and respectively connected to the two ends of the heating film 322. In some embodiments, the conductive film 323 can be printed and superimposed on the heating film 322. The length of the overlapping area between the conductive film 323 and the heating film 322 is 0.2 mm to 0.7 mm, preferably 0.5 mm, to ensure reliable electrical contact. In some embodiments, the infrared film 321, the heating film 322, and the conductive film 323 can be formed using existing technologies. In other embodiments, the infrared film 321 is not limited to being disposed on the outer side surface 313 of the ceramic substrate 31. In other embodiments, it can also be disposed on the inner side surface 314 of the ceramic substrate 31.

[0064] In other embodiments, the infrared film 321 and the heating film 322 are not limited to being independent film structures. The heating layer 32 may also be a conventional infrared heating film that actively generates heat and radiates infrared light when powered. The infrared heating film may be disposed on the outer side 313 and the inner side 314 of the ceramic substrate 31. In other embodiments, the infrared film 321 and the heating film 322 may be independent flexible structures that are wrapped around the outer side 313 of the ceramic substrate 31.

[0065] In this embodiment, the protective layer 33 may cover the outer side surface 313 and may cover the first end surface 311 and / or the second end surface 312. The protective layer 33 may be coated on the periphery of the heating layer 32. In some embodiments, the protective layer 33 may completely cover the first end surface 311, the second end surface 312 and the entire outer side surface 313. In some other embodiments, the protective layer 33 may also be provided only on the first end surface 311 or only on the second end surface 312. In some other embodiments, the protective layer 33 may also be provided only on the outer side surface 313. In addition to enhancing the strength of the ceramic substrate 31, the provision of the protective layer 33 can also prevent the heating layer 32 from being corroded, thereby enhancing the corrosion resistance of the heating component 30, and can prevent fouling, which is beneficial to the cleaning of the heating component 30. By setting the protective layer 33 on the first end face 311 and / or the second end face 312, a heat insulation effect can be achieved, blocking or slowing down the heat conduction and conduction efficiency from the two end faces, thereby reducing heat loss, improving energy efficiency, simplifying the manufacturing process of the heating component 30, and reducing the additional insulation structure requirements at the end of the ceramic base 31.

[0066] In this embodiment, the protective layer 33 is thinner than the ceramic base 31 . Furthermore, the thickness of the protective layer 33 can be selected to be 10-50 μm, which is beneficial to the miniaturization design of the entire heating component 30 .

[0067] In this embodiment, the protective layer 33 can be an integral structure with the tube wall of the ceramic substrate 31. Specifically, the material that can be selected for the protective layer 33 is glass glaze, which can be formed into an integral structure with the ceramic substrate 31 through calcination. It should be noted that glaze is a continuous glassy layer attached to the surface of the ceramic body, or a mixed layer of glass and crystals. It is made by grinding mineral raw materials (quartz) and raw materials in a certain proportion to make a glaze slurry, applying it to the surface of the body, and calcining it at a certain temperature. In some other embodiments, the protective layer 33 is not limited to glass glaze.

[0068] In this embodiment, the thermal conductivity of the protective layer 33 is less than or equal to 1.5 W / mK. This means that the thermal conductivity of the protective layer 33 is significantly lower than that of the ceramic substrate 31. Furthermore, the protective layer 33 has a low infrared transmittance, thereby reducing the outward transmission of infrared light waves. Furthermore, in some embodiments, the infrared emissivity of the protective layer 33 for wavelengths between 1 and 10 μm is less than or equal to 0.5, thereby reducing energy consumption.

[0069] In this embodiment, the heating component 30 may further include a conductive structure 34, which may be connected to the heating layer 32 and may provide external electrical energy to the heating layer 32. Specifically, in some embodiments, there may be two conductive structures 34, and the two conductive structures 34 may be connected to the two conductive films 323 of the heating layer 32 in a one-to-one correspondence. In some embodiments, the conductive structure 34 may be a conductive wire, specifically, a silver wire or a copper wire. In other embodiments, the conductive structure 34 is not limited to a conductive wire, and may be a conductive sheet or a conductive column.

[0070] The working principle of the heating component 30 is to apply voltage to the two ends of the conductive structure 34 away from the conductive film 323, that is, to connect the conductive structure 34 to the power supply component. The heating film 322 of the heating layer 32 generates heat under the action of the current, and the heat is conducted to the infrared film 321. The infrared film 321 radiates infrared light waves. The infrared light waves pass through the ceramic matrix 31 and are absorbed by the aerosol generating matrix 200, thereby heating the aerosol generating matrix 200. In addition, the heating film 322 can also conduct heat directly to the ceramic matrix 31, and conduct the heat to the aerosol generating matrix 200 through the ceramic matrix 31 to heat the aerosol generating matrix 200.

[0071] Figures 6 and 7 The second embodiment of the aerosol generating device of the present invention is shown. The difference between the second embodiment and the first embodiment is that the infrared film 321 and the heating film 322 can be completely covered by the protective layer 33 .

[0072] Figures 8 to 10 The third embodiment of the aerosol-generating device of the present invention is shown. It differs from the first embodiment in that the infrared film 321 can be disposed on the inner side 314 of the ceramic substrate 31. The heating film 322 is not limited to being disposed on the infrared film 321; it can be disposed on the outer side 313 of the ceramic substrate. The protective layer 33 can cover the outer periphery of the heating film 322. The operating principle of the heating component 30 can be that electrical energy is connected to the heating film 322 through the conductive structure 34. Under the action of the current, the heating film 322 generates heat. The heat is transferred to the ceramic substrate 31 and then to the infrared film 321. The infrared film 321 generates infrared radiation waves, which are transferred to the aerosol-generating substrate 200, thereby heating the aerosol-generating substrate 200.

[0073] Figures 11 to 12A fourth embodiment of the aerosol generating device of the present invention is shown. It differs from the first embodiment in that it further includes an independently provided thermal insulation component 40 that is detachably connected to the ceramic substrate 31. The thermal insulation component 40 is provided at both ends of the heating component 30 and at the periphery of the heating component 30. In other embodiments, the thermal insulation component 40 may be provided only at one end of the heating component 30 or only at the periphery of the heating component 30. The thermal insulation component 40 can be used to reduce the transfer of heat from the heating component 30 to the housing 10, thereby improving energy efficiency.

[0074] In this embodiment, the thermal insulation assembly 40 may include a first thermal insulation structure 40a, which may be disposed at an end of the heating assembly 30 facing the plug port 11. Specifically, the first thermal insulation structure 40a may be disposed in the fixing assembly 20 and may be annular, and may be sleeved on an end of the heating assembly 30 facing the opening 221. The first thermal insulation structure 40a may be coaxially disposed with the ceramic substrate 31 and the opening 221, and may be in communication with the opening 221 and the ceramic substrate 31. The provision of the first thermal insulation structure 40a not only protects the ceramic substrate 31 but also provides thermal insulation. The reason why the first thermal insulation structure 40a is set at the end of the heating component 30 facing the plug port 11 is because the temperature of the first end face 311 of the heating component 30 is generally higher than the temperature of the second end face 312, and the difference in the preheating stage is generally 10-50°C. By setting the first thermal insulation structure 40a, the heat conduction to the fixed component 20 or even the outer shell 10 can be blocked or reduced, thereby reducing heat loss and improving energy efficiency.

[0075] In this embodiment, the first thermal insulation structure 40a may include a sleeve portion 41 and a partition portion 42. The sleeve portion 41 and the partition portion 42 may both be hollow tubular structures, and the cross-section may be roughly circular. The sleeve portion 41 may be sleeved on the heating component 30, and its outer diameter may be larger than the outer diameter of the heating component 30. In some other embodiments, the sleeve portion 41 may also be docked with the heating component 30. The partition portion 42 may be provided on the sleeve portion 41 and extend toward the plug-in port 11 to isolate external debris from the heating component 30 and prevent debris from entering the heating component 30. The external debris may be debris generated by friction during the installation of other components in the fixing component 20.

[0076] In this embodiment, the first thermal insulation structure 40a is a thermal insulation ceramic having a thermal conductivity of less than 5 W / mK. Furthermore, in some embodiments, the thermal conductivity of the first thermal insulation structure 40a can be less than or equal to 2.5 W / mK. In some embodiments, the material of the first thermal insulation structure 40a can be zirconia ceramic. Zirconia ceramic is chosen because during rapid preheating, the temperature of the section of the ceramic substrate 31 facing the opening 221 may reach a maximum of approximately 400°C, and the temperature of the first end surface 311 may also reach approximately 350°C. Other organic materials (such as PEEK, plastic, rubber, etc.) have relatively poor high temperature resistance, while zirconia ceramic has better high temperature resistance and can directly contact the first end surface 311.

[0077] In this embodiment, the thermal insulation component 40 may further include a second thermal insulation structure 40b, which may be arranged at the end of the heating component 30 away from the plug port 11, that is, close to the second end face 312. The second thermal insulation structure 40b may be annular, specifically, it may be circular, which may be accommodated in the fixing seat 21, and coaxially arranged with the ceramic matrix 31 to be in direct contact with the end face of the heating component 30. In some embodiments, the high temperature resistance of the second thermal insulation structure 40b may be lower than that of the first thermal insulation structure 40a. In some embodiments, the second thermal insulation structure 40b may be a colloid structure, such as silica gel. Furthermore, the second thermal insulation structure 40b may be selected as a vapor phase glue (silicone made by a vapor phase method), which can withstand a temperature greater than 320°C.

[0078] In some embodiments, the thermal insulation component 40 further includes a third thermal insulation structure 40c, which is arranged around the heating component 30 and is a thermal insulation structure with lower high temperature resistance. The third thermal insulation structure 40c can be arranged around the heating component 30. The third thermal insulation structure 40c is arranged between the outer wall of the heating component 30 and the inner wall of the fixing component 20. Specifically, in some embodiments, the third thermal insulation structure 40c can be a gap. The reason for adopting the third thermal insulation structure 40c with lower high temperature resistance is that the protective layer 33 on the outer side of the ceramic matrix 31 forms a first line of thermal insulation, which reduces the high temperature resistance requirements of the heating component 30 for the surrounding thermal insulation structure. In some other embodiments, the third thermal insulation structure 40c may not be limited to a gap.

[0079] In some embodiments, the thermal insulation component 40 also includes aerogel or vapor-phase glue. The aerogel or vapor-phase glue forms a fourth thermal insulation structure 40d; the aerogel or vapor-phase glue is arranged on the side of the partition portion 42 away from the accommodating cavity 310, and is supported by the sleeve portion 41 of the first thermal insulation structure 40a. In some other embodiments, the fourth thermal insulation structure 40d can also be a gap. In some embodiments, the aerogel can be a porous structure, which can reduce the pressure by increasing the pressure area of ​​the first thermal insulation structure 40a and the aerogel, protect the aerogel, avoid deformation and breakage of the aerogel under pressure, and prevent aerogel dust from entering the ceramic matrix 31. The first thermal insulation structure 40a is separated between the ceramic matrix 31 and the aerogel, and the barrier of the partition portion 42 of the first thermal insulation structure 40a can further prevent aerogel debris from entering the interior of the heating component 30.

[0080] It should be noted that aerogel refers to a nano-scale porous solid material formed by using a sol-gel method, whereby gas replaces the liquid phase in the gel using a specific drying method. Aerogel has a thermal conductivity of 0.02w / mk, primarily for insulation, and its thermal conductivity is lower than that of air (0.025w / mk). Gas-phase silica gel (abbreviated as aerogel), also known as pure silica gel, has a highly transparent appearance, a tensile strength of 7.8-10.0Mpa, an elongation of 500-1000%, and a tear strength of 29.4-49kN / m. The thermal conductivity of aerogel is 0.2w / mk, primarily for sealing, and can also provide insulation, but the insulation effect is inferior to that of aerogel.

[0081] In some embodiments, the aerosol-generating device 100 further includes a sealing ring 50, which is disposed on the side of the first thermal insulation structure 40a facing the insertion port 11 and is in close contact with the end wall of the fixing sleeve 22. In some embodiments, the sealing ring 50 may be a rubber ring. The sealing ring 50 can be separated from the heating element 30 by the partition portion 42 of the first thermal insulation structure 40a, thereby preventing debris generated by the sealing ring 50 from entering the heating element 30.

[0082] Figure 13 and Figure 14 The fifth embodiment of the aerosol generating device of the present invention is shown. It differs from the fourth embodiment in that the first thermal insulation structure 40a can be omitted, the fourth thermal insulation structure 40d and the second thermal insulation structure 40b can be aerogel, and the thickness of the fourth thermal insulation structure 40d is greater than that of the second thermal insulation structure 40b. Specifically, the thickness of the fourth thermal insulation structure 40d is greater than or equal to 2 mm. The thickness of the second thermal insulation structure 40b is less than or equal to 0.5 mm. The provision of the fourth thermal insulation structure 40d and the second thermal insulation structure 40b blocks or slows down the heat conduction from the first end surface 311 and the second end surface 312, thereby reducing heat loss, improving energy efficiency, and lowering the energy consumption of the aerosol generating substrate 200.

[0083] In this embodiment, the aerosol generating device 100 may further include a reflective structure 60. The reflective structure 60 may be a through-hole structure, such as a reflective cover. The reflective structure 60 may be sleeved around the periphery of the heating element 30 to reflect infrared light waves toward the ceramic substrate 31. In other embodiments, the reflective structure 60 is not limited to a reflective cover, but may also be a reflective coating that may be applied to the outer surface of the heating element 30.

[0084] In this embodiment, the reflective structure 60 not only has a reflective effect, but also has a heat insulating effect, forming a third heat insulating structure 40c. In this embodiment, the third heat insulating structure 40c can be provided in the gap between the heating component 30 and the reflective structure 60. In other embodiments, the third heat insulating structure 40c can also be at least two layers of aerogel insulation layers provided between the reflective structure 60 and the fixing component 20.

[0085] In a preferred embodiment, a protective layer 33 may be provided on the periphery of the ceramic substrate 31, and the periphery of the protective layer 33 may be a third thermal insulation structure 40c. The third thermal insulation structure 40c includes, from the inside to the outside, an air layer formed by the gap, a reflective structure 60, and at least two layers of stacked aerogel or gas phase glue.

[0086] Figure 15 The sixth embodiment of the aerosol generating device of the present invention is shown. The difference between the sixth embodiment and the fifth embodiment is that the fourth thermal insulation structure 40d can be aerogel and the second thermal insulation structure 40b can be gas-phase glue.

[0087] 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. A heating component, characterized in that: include: A ceramic base (31) is tubular and infrared-transmissive, with an inner side defining a receiving cavity (310) for receiving the aerosol-generating matrix (200); A protective layer (33) is coated on the ceramic substrate (31), wherein the thickness of the protective layer (33) is less than the wall thickness of the ceramic substrate (31), and the thermal conductivity of the protective layer (33) is lower than the thermal conductivity of the ceramic substrate (31); A heating layer (32) is provided on the tube wall of the ceramic substrate (31) and can heat the aerosol generating matrix (200) by radiating infrared light waves; the heating layer (32) is at least partially located between the protective layer (33) and the ceramic substrate (31).

2. The heating component according to claim 1, characterized in that The transmittance of the ceramic matrix (31) to infrared light with a wavelength of 0-6.5 μm is greater than or equal to 50%.

3. The heating component according to claim 1, characterized in that The thickness of the protective layer (33) is 10-50 μm, and the wall thickness of the ceramic substrate (31) is less than or equal to 1 mm.

4. The heating component according to claim 1, characterized in that The ratio of the thermal conductivity of the ceramic matrix (31) to the thermal conductivity of the protective layer (33) is greater than or equal to 6; Or, the thermal conductivity of the ceramic substrate (31) is greater than or equal to 10w / mk; Alternatively, the thermal conductivity of the protective layer (33) is less than or equal to 1.5 W / mK.

5. The heating component according to claim 1, characterized in that The thermal expansion coefficient of the ceramic matrix (31) is greater than or equal to 5pp, and / or the bending strength of the ceramic matrix (31) is greater than or equal to 100 MPa.

6. The heating component according to claim 1, characterized in that The protective layer (33) has an infrared emissivity of less than or equal to 0.5 for a wavelength of 1-10 μm.

7. The heating component according to claim 1, characterized in that The ceramic base (31) comprises a first end surface (311) and a second end surface (312) arranged opposite to each other in the axial direction, and an outer side surface (313) arranged between the first end surface (311) and the second end surface (312); The protective layer (33) covers the outer side surface (313) and covers the first end surface (311) and / or the second end surface (312).

8. The heating component according to claim 1, characterized in that The heating layer (32) comprises an infrared film (321) and a heating film (322), wherein the infrared film (321) is arranged on the outer side surface (313) of the ceramic substrate (31), the heating film (322) is arranged on the infrared film (321), and the protective layer (33) is coated on the outer periphery of the heating film (322) and the infrared film (321); Alternatively, the heating layer (32) includes an infrared film (321) and a heating film (322), the infrared film (321) is arranged on the inner side (314) of the ceramic base (31), the heating film (322) is arranged on the outer side (313) of the ceramic base (31), and the protective layer (33) is coated on the periphery of the heating film (322); Alternatively, the heating layer (32) includes an infrared heating film that actively generates heat and radiates infrared light when powered on, the infrared heating film is arranged on the outer side (313) or the inner side (314) of the ceramic substrate (31), and the protective layer (33) is coated on the infrared heating film.

9. An aerosol generating device, characterized in that: It comprises a housing (10), and a heating component (30) according to any one of claims 1 to 8 arranged in the housing (10); The housing (10) is provided with an insertion port (11); the insertion port (11) is in communication with the accommodating cavity (310) of the heating component (30) and is used for inserting an aerosol generating matrix.

10. The aerosol generating device according to claim 9, characterized in that The aerosol generating device further comprises a first heat insulating structure (40a) arranged at one end of the heating component (30), wherein the first heat insulating structure (40a) is arranged at one end of the heating component (30) facing the plug port (11).

11. The aerosol generating device according to claim 10, characterized in that The first heat-insulating structure (40a) comprises a hollow tubular sleeve portion (41) and a partition portion (42); the sleeve portion (41) is docked or sleeved on the heating component (30), and the partition portion (42) is arranged on one side of the sleeve portion (41) and extends toward the plug-in port (11).

12. The aerosol generating device according to claim 11, characterized in that The first heat-insulating structure (40a) is heat-insulating ceramic, and its thermal conductivity is less than 5w / mk.

13. The aerosol generating device according to claim 11, characterized in that The aerosol generating device further comprises an aerogel or a vapor-phase glue arranged on the first heat-insulating structure (40a), wherein the aerogel or the vapor-phase glue is located on a side of the partition portion (42) away from the accommodating cavity (310).

14. The aerosol generating device according to claim 13, wherein: The aerosol generating device further comprises a sealing ring (50), which is arranged on the aerogel or gas-phase glue and faces one side of the plug-in port (11).

15. The aerosol generating device according to claim 10, wherein: The aerosol generating device comprises a second heat insulating structure (40b), The second heat insulation structure (40b) is arranged at an end of the heating component (30) away from the plug port (11).

16. The aerosol generating device according to claim 10, wherein: The aerosol generating device comprises a third heat insulation structure (40c), The third heat insulation structure (40c) is arranged on the outer periphery of the heating component (30).

17. The aerosol generating device according to claim 16, wherein: The aerosol generating device comprises a reflective structure (60), wherein the reflective structure (60) is sleeved on the outer periphery of the heating component (30); And / or, the third heat insulation structure (40c) includes a gap provided on the periphery of the heating component (30); And / or, the third thermal insulation structure (40c) comprises at least two thermal insulation layers stacked on each other and arranged on the periphery of the heating component (30), and the thermal insulation layers are aerogel and / or vapor phase glue.

Images