Heating assembly and aerosol generating device

Abstract

Provided in the present application are a heating assembly and an aerosol generating device. The heating assembly comprises an accommodating structure, at least one heating film and a power supply assembly, wherein the accommodating structure is provided with a near-end opening, and is configured to accommodate an aerosol-generated product through the near-end opening and radiate infrared rays when heated. so as to heat the aerosol-generated product; the at least one heating film is linearly arranged on the accommodating structure, and is configured to heat the accommodating structure when powered on; at least part of each heating film extends in the lengthwise direction of the accommodating structure; the power supply assembly comprises a first electrode and a second electrode; and two ends of each heating film are electrically connected to the first electrode and the second electrode, respectively, so as to supply power to the at least one heating film. The heating assembly effectively improves the heating efficiency, and has better heating uniformity, thereby avoiding the problem of the aerosol-generated product being scorched due to local high temperature of the aerosol-generated product.

Description

CROSS REFERENCE TO RELATED APPLICATIONS

[0001] The present disclosure claims priority to China Patent Applicant No. 202211131838.5, filed on September 16, 2022, the contents of which are herein incorporated by reference in their entireties.TECHNICAL FIELD

[0002] Embodiments of the present disclosure relate to the technical field of electronic atomization, and in particular to a heating assembly and an aerosol generating device.BACKGROUND

[0003] Heat-Not-Burning (HNB) aerosol generating devices are increasingly favored and valued for their advantages of safety, convenience, health benefits, environmental friendliness, and the like.

[0004] The current HNB aerosol generating device generally includes a heating assembly and a power source assembly. The heating assembly is configured to heat and atomize an aerosol generating substance when the heating assembly is powered, thereby generating an aerosol. The power source assembly is connected to the heating assembly and is configured to supply power to the heating assembly.

[0005] However, the current heating assemblies have a relatively low heating efficiency, a relatively large temperature difference between an interior of the aerosol generating substance and an exterior of the aerosol generating substance, and a relatively poor heating uniformity. Besides, during the current heating assemblies heating the aerosol generating substance, a high-temperature region is located at a central region of a heating element, resulting in a slower aerosol generation rate and a failure in designing an intended temperature field and making other high-temperature regions become difficult to be designed at asymmetric positions.SUMMARY OF THE DISCLOSURE

[0006] Some embodiments of the present disclosure provide a heating assembly and an aerosol generating device to address problems of a relatively low heating efficiency, a relatively large temperature difference between an interior of an aerosol generating substance and an exterior of the aerosol generating substance, and a relatively poor heating uniformity in current heating assemblies.

[0007] To address the technical problems above, some embodiments of the present disclosure provide a heating assembly. The heating assembly includes an accommodating structure, at least one heating film, and a power supply assembly. The accommodating structure includes a near-end opening. The accommodating structure is configured to accommodate an aerosol generating substance through the near-end opening and radiate an infrared ray to heat the aerosol generating substance in a case where the accommodating structure is heated. The at least one heating film is linearly disposed on the accommodating structure and is configured to heat the accommodating structure in a case where the at least one heating film is powered. At least a part of each of the at least one heating film extends along a length direction of the accommodating structure. The power supply assembly includes a first electrode and a second electrode. An end of each of the at least one heating film is electrically connected to the first electrode and the other end of each of the at least one heating film is electrically connected to the second electrode, enabling both the first electrode and the second electrode to supply power to the at least one heating film.

[0008] In some embodiments, the heating film includes a plurality of heating lines. At least two of the plurality of heating lines are connected in parallel. At least a part of each of the plurality of heating lines extends along the length direction of the accommodating structure.

[0009] In some embodiments, at least a part of the plurality of heating lines are curved lines.

[0010] In some embodiments, the curved lines are U-shaped or S-shaped.

[0011] In some embodiments, each of the plurality of heating lines extends along the length direction of the accommodating structure. Each of the plurality of heating lines includes a first end and a second end. The first end of a part of the plurality of heating lines is electrically connected to the first electrode. The second end of the part of the plurality of heating lines is electrically connected to the second end of a remaining part of the plurality of heating lines. The first end of the remaining part of the plurality of heating lines is electrically connected to the second electrode.

[0012] In some embodiments, the heating film further includes a first electrically connecting part extending along a circumferential direction of the accommodating structure. The second end of each of the plurality of heating lines is electrically connected to the first electrically connecting part.

[0013] In some embodiments, the heating film further includes a second electrically connecting part and / or a third electrically connecting part. The first end of each of the part of the plurality of heating lines is electrically connected to the second electrically connecting part, enabling the first end of the part of the plurality of heating lines to be electrically connected to the first electrode through the second electrically connecting part. The first end of each of the remaining part of the plurality of heating lines is electrically connected to the third electrically connecting part, enabling the first end of the remaining part of the plurality of heating lines to be electrically connected to the second electrode through the third electrically connecting part.

[0014] In some embodiments, the heating film further includes a first heating line, a second heating line, a third heating line, and a fourth heating line. The first heating line and the second heating line are connected in parallel between the first electrode and the first electrically connecting part. The third heating line and the fourth heating line are connected in parallel between the second electrode and the first electrically connecting part.

[0015] In some embodiments, each of the plurality of heating lines is U-curved.

[0016] In some embodiments, the plurality of heating lines are symmetrically disposed with respect to a central axis along a width direction of the heating film. Any adjacent two of the plurality of heating lines are symmetrically arranged along another central axis therebetween.

[0017] In some embodiments, an end of each of the plurality of heating lines is electrically connected to the first electrode. The other end of each of the plurality of heating lines is electrically connected to the second electrode.

[0018] In some embodiments, each of the plurality of heating lines includes a first part, a second part, and a third part that are sequentially connected to each other. Each of the first part and the third part extends along the length direction of the accommodating structure. One of the first part and the third part is electrically connected to the first electrode. The other one of the first part and the third part is electrically connected to the second electrode. The second part extends along a circumferential direction of the accommodating structure.

[0019] In some embodiments, the heating film includes a first heating line and a second heating line that are connected in parallel. A first part of the first heating line is a curved line. Each of a second part and a third part of the first heating line is a straight line. Each of a first part, a second part, and a third part of the second heating line is a straight line.

[0020] In some embodiments, a length of the second heating line is greater than a length of the first heating line. The second heating line surrounds a periphery of the first heating line.

[0021] In some embodiments, the first electrode and the second electrode are disposed on a same end of the accommodating structure.

[0022] In some embodiments, the at least one heating film is configured to have different power densities on both sides of a midpoint along the length direction of the accommodating structure.

[0023] In some embodiments, a surface of the accommodating structure is divided into a first region and a second region by a plane that is perpendicular to the length direction of the accommodating structure and penetrates through the midpoint. The second region is located at a side of the first region away from the near-end opening. A power density of the at least one heating film in the first region is greater than a power density of the at least one heating film in the second region.

[0024] To address the technical problems above, some embodiments of the present disclosure provide an aerosol generating device. The aerosol generating device includes the heating assembly mentioned above and a power source assembly. The power source assembly is electrically connected to the heating assembly and is configured to supply power to the heating assembly.

[0025] Different from the related art, some technical effects of the present disclosure may be the following. Some embodiments of the present disclosure provide a heating assembly and an aerosol generating device. The heating assembly includes an accommodating structure and at least one heating film. The at least one heating film is disposed on the accommodating structure and at least a part of each heating film extends along the length direction of the accommodating structure. In this way, the at least one heating film is configured to heat the accommodating structure when the at least one heating film is powered, thereby enabling the accommodating structure to be heated to radiate the infrared ray. The infrared ray is configured to heat and atomize the aerosol generating substance accommodated in the accommodating structure. Since the infrared ray has a certain degree of penetrability and does not require medium, heating the aerosol generating substance through the infrared ray offers a high heating efficiency, effectively improving a preheating efficiency of the aerosol generating substance, reducing a temperature difference between an interior of the aerosol generating substance and an exterior of the aerosol generating substance, ensuring an uniform roasting of the aerosol generating substance, and reducing a risk of the aerosol generating substance being scorched due to a localized high temperature. In addition, the power source assembly that includes the first electrode and the second electrode is disposed. One end of each heating film is electrically connected to the first electrode and the other end of each heating film is electrically connected to the second electrode, which enables the power source assembly to supply power to each heating film and achieves a one-end heating.BRIEF DESCRIPTION OF THE DRAWINGS

[0026] FIG. 1 is a schematic structural view of an aerosol generating system according to some embodiments of the present disclosure. FIG. 2 is a schematic structural view of an aerosol generating device according to some embodiments of the present disclosure. FIG. 3 is a schematic cross-sectional view of a heating assembly according to a first embodiment of the present disclosure. FIG. 4 is a schematic perspective view of a heating assembly according to some embodiments of the present disclosure. FIG. 5 is an exploded schematic view of FIG. 4. FIG. 6 is a schematic cross-sectional view of a heating assembly according to some embodiments of the present disclosure. FIG. 7 is a schematic structural view illustrating that an aerosol generating substance is accommodated in an accommodating structure according to some embodiments of the present disclosure. FIG. 8 is a schematic structural view illustrating that an aerosol generating substance is accommodated in an accommodating structure according to some other embodiments of the present disclosure. FIG. 9 is a schematic view illustrating that both a heating film and a power supply assembly shown in FIG. 4 unfold along a circumferential direction of an accommodating structure. FIG. 10 is a schematic view illustrating that both a heating film and a power supply assembly unfold along a circumferential direction of an accommodating structure according to some other embodiments of the present disclosure. FIG. 11 is a schematic perspective view of a heating assembly according to some other embodiments of the present disclosure. FIG. 12 is an exploded schematic view of FIG. 11. FIG. 13 is a schematic view illustrating that both a heating film and a power supply assembly shown in FIG. 11 unfold along a circumferential direction of an accommodating structure. FIG. 14 is a schematic cross-sectional view of a heating assembly according to a second embodiment of the present disclosure. FIG. 15 is a schematic cross-sectional view of a heating assembly according to some other embodiments of the present disclosure. FIG. 16 is a schematic cross-sectional view of a heating assembly according to a third embodiment of the present disclosure.

[0027] Reference signs: 1, aerosol generating device; 2, aerosol generating substance; 10, heating assembly; 20, power source assembly; 11, accommodating structure; 111, substrate; 110, accommodating chamber; a, first end; b, second end; 112, radiating layer; 113, first insulting layer; 114, second insulating layer; 12, heating film; 121a, first heating line; 121b, second heating line; 121, heating line; 122, first electrically connecting part; 123, second electrically connecting part; 124, third electrically connecting part; 125, first part; 126, second part; 127, third part; 13, power supply assembly; 131, first electrode; 132, second electrode; M, midline plane; A, first region; B, second region.DETAILED DESCRIPTION

[0028] The technical solutions in some embodiments of the present disclosure will be described clearly and comprehensively with reference to figures in some embodiments of the present disclosure. Obviously, the described embodiments are merely some embodiments of the present disclosure, not all embodiments of the present disclosure. Based on the embodiments of the present disclosure, any other embodiments derived by those skilled in the art without creative efforts fall within the scope of the present disclosure.

[0029] The terms "first", "second", "third", and etc. in the present disclosure are used merely for descriptive purposes and should not be construed to indicate or imply relative importance or specify the quantity of the referenced technical features. Consequently, features defined by "first", "second", "third", or etc., may explicitly or implicitly include at least one of such features. The term "plurality" refers to at least two, such as two or three, unless explicitly stated otherwise. In the embodiments of the present disclosure, all directional indications (such as up, down, left, right, front, back, and etc.) are used merely to explain the relative positional relationship, movement, and etc., between components in a specific orientation (as shown in the figures). When the specific orientation changes, the directional indications will accordingly change as well. Besides, the terms "comprising", "including", and "having", as well as their variations, are intended to cover inclusive rather than exclusive arrangements. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0030] References to the term "embodiment" herein means that the specific features, structures, or characteristics described in connection with the embodiment may be included in at least one embodiment of the present disclosure. The term "embodiment" used in various locations of the specification does not necessarily refer to the same embodiment, nor does it imply a mutually exclusive independent or alternative embodiment. Those skilled in the art explicitly or implicitly understand that the embodiments described herein may be combined with other embodiments.

[0031] The present disclosure is described in detail below with reference to the figures and the embodiments.

[0032] As shown in FIG. 1, FIG. 1 is a schematic structural view of an aerosol generating system according to some embodiments of the present disclosure.

[0033] In some embodiment, an aerosol generating system is provided. The aerosol generating system includes an aerosol generating device 1 and an aerosol generating substance 2 accommodated in the aerosol generating device 1. The aerosol generating device 1 is configured to heat and atomize the aerosol generating substance 2 to generate an aerosol for a user to inhale. The aerosol generating device 1 may be applicable in fields such as medical, cosmetic, health care, electronic atomization, and etc. Specific structures and functions of the aerosol generating device 1 may refer to the following embodiments. The aerosol generating substance 2 may be a solid substance, including one or more powders, granules, fragments, strips, or sheets of plant leaves, such as tobacco, vanilla leaves, tea leaves, mint leaves, or the like. In some embodiments, the solid substrate may include an additional volatile aromatic compound that is able to be released when the solid substrate is heated. In some embodiments, the aerosol generating substance may be a liquid substance or a paste substance, such as oils, medicinal liquids, or the like, which contains aromatic components.

[0034] As shown in FIG. 2, FIG. 2 is a schematic structural view of an aerosol generating device according to some embodiments of the present disclosure.

[0035] In some embodiments, an aerosol generating device 1 is provided. The aerosol generating device 1 includes a heating assembly 10 and a power source assembly 20. The heating assembly 10 is configured to accommodate the aerosol generating substance 2 and atomize the aerosol generating substance 2 to generate an aerosol when the heating assembly 10 is powered. Specific structures and functions of the heating assembly 10 may refer to the heating assembly 10 in any one of the following embodiments. The power source assembly 20 is electrically connected to the heating assembly 10 and is configured to supply power to the heating assembly 10. In some embodiments, the power source assembly 20 may be a lithium-ion battery.

[0036] As shown in FIGS. 3 and 4, FIG. 3 is a schematic cross-sectional view of a heating assembly according to a first embodiment of the present disclosure, and FIG. 4 is a schematic perspective view of a heating assembly according to some embodiments of the present disclosure. In the first embodiment, a heating assembly 10 is provided. The heating assembly 10 includes an accommodating structure 11, at least one heating film 12, and a power supply assembly 13.

[0037] As shown in FIG. 4, the power supply assembly 13 includes a first electrode 131 and a second electrode 132. An end of the at least one heating film 12 is electrically connected to the first electrode 131 and the other end of the at least one heating film 12 is electrically connected to the second electrode 132, which enables both the first electrode 131 and the second electrode 132 to supply power to the at least one heating film 12, thereby enabling the at least one heating film 12 to be heated at one end. That is, the at least one heating film 12 share the first electrode 131 and the second electrode 132 for power supply. The at least one heating film 12 has a same supply power.

[0038] The first electrode 131 and the second electrode 132 of the power supply assembly 13 may be disposed on a same end of the accommodating structure 11 and both extend along a circumferential direction of the accommodating structure 11. In some embodiments, the first electrode 131 and the second electrode 132 may both be disposed on an end of the accommodating structure 11 away from a near-end opening of the accommodating structure 11. A material of each of the first electrode 131 and the second electrode 132 may include a metal with high conductivity, such as silver, gold, copper, or alloys thereof, etc.

[0039] As shown in FIG. 3, the accommodating structure 11 includes a substrate 111 and a radiating layer 112. The substrate 111 is in shape of a hollow tube. The substrate 111 defines an accommodating chamber 110, the near-end opening, and a far-end opening. The near-end opening and far-end opening are both communicated with the accommodating chamber 110 and are arranged in opposite to each other along a length direction C of the substrate 111. The accommodating chamber 110 is configured to accommodate the aerosol generating substance 2. The aerosol generating substance 2 is enabled to be received in or be removed from the accommodating chamber 110 along the length direction C of the accommodating chamber 110 through the near-end opening. The near-end opening is an end of the heating assembly 10 that is closer to a mouthpiece. In some embodiments, the substrate 111 has a hollow tubular structure that encircles or defines the accommodating chamber 110. In some embodiments, an outer diameter of the substrate 111 is constant along the length direction C thereof. In some embodiments, the substrate 111 may be in shape of a hollow cylinder.

[0040] In some embodiments, the substrate 111 may be made of an insulating material. For example, the substrate 111 may be a quartz tube, a ceramic tube, or a mica tube, etc. In some embodiments, the substrate 111 is a transparent quartz tube that facilitates a transmission of the infrared ray. Alternatively, the substrate 111 may be made of a non-insulating material, such as metals like stainless steel or aluminum, etc.

[0041] The radiating layer 112 is disposed on an inner surface of a sidewall of the substrate 111 and is configured to radiate the infrared ray when the radiating layer 112 is heated. The infrared ray is further configured to heat and atomize the aerosol generating substance 2 in the accommodating chamber 110. Since the infrared ray has a certain degree of penetrability and does not require medium, heating the aerosol generating substance 2 through the infrared ray as mentioned above offers a high heating efficiency, effectively improving a preheating efficiency of the aerosol generating substance 2, reducing a temperature difference between an interior of the aerosol generating substance 2 and an exterior of the aerosol generating substance 2, ensuring an uniform roasting of the aerosol generating substance 2, and reducing a risk of the aerosol generating substance 2 being scorched due to a localized high temperature. In addition, since the radiating layer 112 is disposed on the inner surface of the substrate 111, the radiating layer 112 directly radiates the infrared ray to the aerosol generating substance 2 without passing through the substrate 111, thereby enhancing an infrared utilization efficiency.

[0042] The radiating layer 112 may be formed on the entire inner surface of the sidewall of the substrate 111 through methods such as screen printing, sputtering, coating, or printing, etc. In some embodiments, the radiating layer 112 may be an infrared layer that is made of a material with high infrared emissivity, such as at least one of a perovskite system, a spinel system, a carbide, a silicide, a nitride, an oxide, or a rare-earth material, etc.

[0043] As shown in FIGS. 3-5, FIG. 5 is an exploded schematic view of FIG. 4. The at least one heating film 12 covers the accommodating structure 11 linearly. In some embodiments, the at least one heating film 12 is disposed on a side of the substrate 111 away from the radiating layer 112 and is spaced apart from a surface of the accommodating structure 11 along the circumferential direction of the accommodating structure 11. When the at least one heating film 12 is powered, the at least one heating film 12 is configured to generate thermal energy to heat the radiating layer 112, enabling the radiating layer 112 to be heated to radiate the infrared ray. In some embodiments, the at least one heating film 12 includes a resistance material that releases Joule heat after being powered. For example, the at least one heating film 12 may be a thick-film printed resistive layer, a thin-film printed resistive layer, or a nano-resistive layer, etc.

[0044] As shown in FIG. 3, when the substrate 111 is an insulating substrate 111, the at least one heating film 12 is disposed on the surface of the side of the substrate 111 away from the radiating layer 112. The thermal energy generated by the at least one heating film 12 is conducted through the substrate 111 to the radiating layer 112. It can be understood that in some embodiments, the at least one heating film 12 is directly disposed on the surface of the accommodating structure 11. That is, the at least one heating film 12 is directly in contact with the surface of the accommodating structure 11. In some embodiments, when the substrate 111 is a non-insulating substrate 111, a material of the substrate 111 includes a metal, such as a stainless steel. As shown in FIG. 6, FIG. 6 is a schematic cross-sectional view of a heating assembly according to some embodiments of the present disclosure. A first insulating layer 113 that resists a high temperature is disposed on the surface of the substrate 111 away the radiating layer 112. In some embodiments, the at least one heating film 12 is disposed on a surface of the first insulating layer 113 away from the substrate 111 to reduce a risk of short circuit between the at least one heating film 12 and the substrate 111. In this case, the thermal energy generated by the at least one heating film 12 is conducted sequentially through the first insulating layer 113 and the substrate 111 to the radiating layer 112. It can be understood that in some embodiments, the at least one heating film 12 is disposed on the accommodating structure 11 through the first insulating layer 113. That is, the at least one heating film 12 is indirectly in contact with the surface of the accommodating structure 11. In some embodiments, the first insulating layer 113 is an enamel layer.

[0045] In some embodiments, to enhance a heat utilization efficiency of the heating assembly 10 and further improve a heating efficiency of the aerosol generating substance 2, as shown in FIG. 7, FIG. 7 is a schematic structural view illustrating that an aerosol generating substance is accommodated in an accommodating structure according to some embodiments of the present disclosure. When the aerosol generating substance 2 is accommodated in the accommodating chamber 110, the aerosol generating substance 2 is directly in contact with an inner surface of a sidewall of the accommodating structure 11, e.g., a surface of the radiating layer 112. Thus, in addition to heating the aerosol generating substance 2 through radiating the infrared ray to the interior of the aerosol generating substance 2, the thermal energy generated by the at least one heating film 12 may be conducted through the accommodating structure 11, e.g., the radiating layer 112, to the aerosol generating substance 2, thereby further enhancing the heat utilization efficiency, speeding up an atomization process, and increasing an aerosol generation rate.

[0046] In some embodiments, as shown in FIG. 8, FIG. 8 is a schematic structural view illustrating that an aerosol generating substance is accommodated in an accommodating structure according to some other embodiments of the present disclosure. When the aerosol generating substance 2 is accommodated in the accommodating chamber 110, the aerosol generating substance 2 may be spaced apart from the inner surface of the sidewall of the accommodating structure 11, e.g., the radiating layer 112, to reduce a risk of scratching or damaging the radiating layer 112. It can be understood that in some embodiments, the aerosol generating substance 2 is heated mainly through radiating the infrared ray. Furthermore, a surface of the at least one heating film 12 and / or a surface of the radiating layer 112 may be coated with a protective layer. The protective layer may be an enamel layer. A thickness of the radiating layer 112 may range from 10 to 100 micrometers. In some embodiments, the thickness of the radiating layer 112 is in a range of 20 to 40 micrometers. In this case, the radiating layer 112 may be formed through a thick-film printing. A material of the radiating layer 112 may include at least one of a black silicon, a cordierite, a transition metal oxide-based spinel, a rare earth oxide, an ion co-doped perovskite, a silicon carbide, a zircon, and a boron nitride, etc. Alternatively, the thickness of the radiating layer 112 may range from 1 to 10 micrometers. In some embodiments, the thickness of the radiating layer 112 is in a range of 1 to 5 micrometers. In this case, the radiating layer 112 is formed through a thin-film coating. The material of the radiating layer 112 may include a chromium carbide (CrC) film, a titanium carbo-nitride (TiCN) film, or a diamond-like carbon (DLC) film.

[0047] As shown in FIG. 9, FIG. 9 is a schematic view illustrating that both a heating film and a power supply assembly shown in FIG. 4 unfold along a circumferential direction of an accommodating structure. In some embodiments, the number of the at least one heating film 12 is one. The one heating film 12 includes a plurality of heating lines 121 connected in parallel. At least two of the plurality of heating lines 121 are connected in parallel. Each of the plurality of heating lines 121 has a linear shape. At least a part of each heating line 121 extends along the length direction C of the accommodating structure 11. It can be understood that a length of the linear heating line 121 is greater than a width of the linear heating line 121.

[0048] As shown in FIG. 9, at least a part of the plurality of heating lines 121 are curved lines. The curved lines may be S-shaped. Alternatively, as shown in FIG. 10, FIG. 10 is a schematic view illustrating that both a heating film 12 and a power supply assembly 13 unfold along a circumferential direction of an accommodating structure 11 according to some other embodiments of the present disclosure. The curved lines may be U-shaped. In some other embodiments, each heating line 121 may have in another irregular curved shape, such as a combination of a S-shaped curve and a U-shaped curve, which is not limited herein.

[0049] In some embodiments, as shown in FIG. 9, each of the plurality of heating lines 121 extends along the length direction C of the accommodating structure 11. Each of the plurality of heating lines 121 has a first end and a second end. The first end of a part of the plurality of heating lines 121, referred to as a first group of heating lines below, is electrically connected to the first electrode 131. The second end of each heating line 121 in the first group of heating lines is electrically connected to the second end of a remaining part of the plurality of heating lines 121, referred to as a second group of heating lines. The first end of each heating line 121 in the second group of heating lines is electrically connected to the second electrode 132, such that the plurality of heating lines 121 in the first group of heating lines are connected in parallel, the plurality of heating lines 121 in the second group of heating lines are connected in parallel, and the first group of heating lines and second group of heating lines are connected in series.

[0050] In some embodiments, each heating line 121 is an S-shaped curve extending along the length direction C of the accommodating structure 11. In some embodiments, each heating line 121 is a U-shaped curve extending along the length direction C of the accommodating structure 11. The plurality of heating lines 121 are symmetrically disposed with respect to a central axis L of the at least one heating film 12. Any adjacent two of the plurality of heating lines 121 are symmetrically arranged along another central axis therebetween. The central axis L is a central axis of the at least one heating film 12 when the at least one heating film 12 is unfolded along a width direction D.

[0051] In some embodiments, the heating assembly 10 further includes a first electrically connecting part 122, a second electrically connecting part 123, and a third electrically connecting part 124. The first electrically connecting part 122 is disposed at an end of the accommodating structure 11 that is close to the near-end opening. The second end of each of the plurality of heating lines 121 is electrically connected to the first electrically connecting part 122, thereby electrically connecting the second end of each of the plurality of heating lines 121 through the first electrically connecting part 122 and enabling the first group of heating lines and the second group of heating lines to be connected in series.

[0052] The first end of each of the plurality of heating lines 121 in the first group of heating lines is electrically connected to the second electrically connecting part 123, enabling the plurality of heating lines 121 in the first group of heating lines to be electrically connected to the first electrode 131 through the second electrically connecting part 123. The first end of each of the plurality of heating lines 121 in the second group of heating lines is electrically connected to the third electrically connecting part 124, enabling the plurality of heating lines 121 in the second group of heating lines to be electrically connected to the second electrode 132 through the third electrically connecting part 124. In this way, the power is supplied to the at least one heating film 12 through the first electrode 131 and the second electrode 132.

[0053] In some embodiments, the heating film 12 includes four heating lines 121, i.e., a first heating line, a second heating line, a third heating line, and a fourth heating line. The first heating line and the second heating line are connected in parallel between the first electrode 131 and the first electrically connecting part 122. The third heating line and the fourth heating line are connected in parallel between the second electrode 132 and the first electrically connecting part 122. In other words, the four heating lines 121 of the heating film 12 are first connected in parallel in pairs and then connected in series.

[0054] In some embodiments, the at least one heating film 12 is configured to have different power densities on both sides of a midpoint along the length direction C of the accommodating structure 11. That is, the thermal energy generated by the at least one heating film 12 causes a high-temperature region inside the accommodating chamber 110 of the accommodating structure 11 to be not located at a central region along the length direction C of the accommodating chamber 110, thereby enabling a temperature field of the accommodating structure 11 to be designed as intended and facilitating the design of other high-temperature regions at asymmetric positions.

[0055] As shown in FIGS. 4-9, a surface of the accommodating structure 11 is divided into a first region A and a second region B by a plane M that is substantially perpendicular to the length direction C of the accommodating structure 11 and penetrates through the midpoint. The second region B is located at a side of the first region A away from the near-end opening. A part of each heating line 121 of each heating film 12 is located in the first region A. A remaining part of each heating line 121 of each heating film 12 is located in the second region B. A resistance density of a unit area of the at least one heating film 12 in the first region A is different from a resistance density of a unit area of the at least one heating film 12 in the second region B. In this way, when the at least one heating film 12 is powered, a heating power of the accommodating structure 11 in the first region A is ensured to be different from a heating power of the accommodating structure 11 in the second region B, thereby defining the first region A and the second region B that have different temperatures in the accommodating structure 11. In addition, as mentioned above, the first region A and the second region B are divided by the midline plane M, ensuring the high-temperature region to be deviated from the midpoint of the length direction C of the accommodating chamber 110 and facilitating the design of other high-temperature regions at asymmetric positions.

[0056] In some embodiments, to increase a heating speed of the heating assembly 10 near the near-end opening to increase the aerosol generation rate, the resistance density of the unit area of the at least one heating film 12 in the first region A is set to be greater than the resistance density of the unit area of the at least one heating film 12 in the second region B. In this way, since the at least one heating film 12 in the first region A and the at least one heating film 12 in the second region B are generally connected in series, a power density of a region with a higher resistance density is greater when the at least one heating film 12 is powered. That is, a heating power density of the first region A is greater than a heating power density of the second region B. Correspondingly, an overlap area between the inner surface of the substrate 111 in the first region A and the at least one heating film 12 is larger than an overlap area between the radiating layer 112 in the second region B and the at least one heating film 12. A temperature of the radiating layer 112 in the first region A is higher than a temperature of the radiating layer 112 in the second region B. The radiating layer 112 in the first region A radiates more infrared rays than the radiating layer 112 in the second region B. In this way, an intended design effect of the temperature in the first region A being higher than the temperature in the second region B is achieved. That is, an intended design effect of the high-temperature region of the heating assembly 10 being located in the first region A is achieved, effectively improving the atomization efficiency of the aerosol generating substance 2 corresponding to the first region A and increasing the aerosol generation rate.

[0057] In some embodiments, as shown in FIG. 9, each heating line 121 of the at least one heating film 12 has the same material and thickness. To design different temperature regions as intended, resistance densities of different regions may be controlled through adjusting a width of multiple heating portions in different regions and a length of the at least one heating film 12 along the length direction C of the accommodating structure 11. For example, when each heating line 121 in the at least one heating film 12 has the same width, along the length direction C of the accommodating structure 11, a length of the at least one heating film 12 in the first region A is set to be smaller than a length of the at least one heating film 12 in the second region B, and different cross-sectional areas. In this way, the resistance density of the unit area of the at least one heating film 12 in the first region A is set to be greater than the resistance density of the unit area of the at least one heating film 12 in the second region B. The width of the at least one heating line 121 refers to a size of the at least one heating line 121 along the width direction D.

[0058] In some other embodiments, as shown in FIGS. 11-13, FIG. 11 is a schematic perspective view of a heating assembly according to some other embodiments of the present disclosure, FIG. 12 is an exploded schematic view of FIG. 11, and FIG. 13 is a schematic view illustrating that both a heating film and a power supply assembly shown in FIG. 11 unfold along a circumferential direction of an accommodating structure. Different from the embodiments corresponding to FIG. 4-10, one end of each heating line 121 is electrically connected to the first electrode 131 and the other end of each heating line 121 is electrically connected to the second electrode 132.

[0059] In some embodiments, as shown in FIG. 13, each heating line 121 includes a first part 125, a second part 126, and a third part 127 that are sequentially connected to each other. Each of the first part 125 and the third part 127 extends along the length direction C of the accommodating structure 11. One of the first part 125 and the third part 127 is electrically connected to the first electrode 131. The other one of the first part 125 and the third part 127 is electrically connected to the second electrode 132. The second part 126 extends along the circumferential direction of the accommodating structure 11. A corner is formed at a connection between the first part 125 and the second part 126. Another corner is further formed at a connection between the second part 126 and the third part 127. Both corners may be chamfered.

[0060] In some embodiments, the first part 125 of each heating line 121 extends from the second region B to the first region A. The second part 126 of each heating line 121 is located in the first region A of the accommodating structure 11. The third part 127 of each heating line 121 extends from the first region A to the second region B to be electrically connected to the second electrode 132.

[0061] In some embodiments, as shown in FIGS. 12 and 13, the heating film 12 may include a first heating line 121a and a second heating line 121b connected in parallel. The first part 125 of the first heating line 121a may be a curved line, such as a U-shaped curve. The second part 126 and the third part 127 of the first heating line 121a are both straight lines. The first part 125, the second part 126, and the third part 127 of the second heating line 121b are all straight lines. In some embodiments, a length of the second heating line 121b is greater than a length of the first heating line 121a. The second heating line 121b surrounds a periphery of the first heating line 121a.

[0062] In some embodiments, one end of each heating line 121 may be directly connected to the first electrode 131 and the other end of each heating line 121 may be directly connected to the second electrode 132, such that the second electrically connecting part 123 and / or the third electrically connecting part 124 are no longer required.

[0063] In some other embodiments, the resistance density of each heating line 121 in different regions can alternatively be controlled through adjusting a material or a thickness of each heating line 121 in corresponding regions. The material or the thickness of each heating line 121 is not limited herein, as long as the resistance density of the at least one heating film 12 in the first region A is different from the resistance density of the at least one heating film 12 in the second region B.

[0064] Those skilled in the art can understand that the above-mentioned accommodating structure 11 may further be divided into multiple regions by another plane perpendicular to the length direction C of the accommodating structure 11 or by more than one plane parallel to the another plane. The at least one heating film 12 in at least two regions of the multiple regions may have different widths along the length direction C of the accommodating structure 11, thereby forming regions with different temperatures. The high-temperature region in the multiple regions with different temperatures deviates from the midpoint of the length direction C of the accommodating structure 11.

[0065] The heating assembly 10 provided by some embodiments of the present disclosure heats the aerosol generating substance 2 through radiating the infrared ray. Compared to technical solutions using a resistance heating or an electromagnetic heating, since the infrared ray has a certain degree of penetrability and does not require medium, heating the aerosol generating substance 2 through the infrared ray offers the relatively high heating efficiency, effectively improving the preheating efficiency of the aerosol generating substance 2, reducing the temperature difference between the interior of the aerosol generating substance 2 and the exterior of the aerosol generating substance 2, ensuring the uniform roasting of the aerosol generating substance 2, and reducing the risk of the aerosol generating substance 2 being scorched due to the localized high temperature. In addition, the at least one heating film 12 is configured to form the high-temperature region that deviates from the midpoint of the length direction C of the accommodating chamber 110 in the accommodating chamber 110 of the accommodating structure 11, thereby enabling the temperature field of the accommodating structure 11 to be designed as intended and facilitating the design of other high-temperature regions at asymmetric positions. Besides, through controlling the length of the plurality of heating lines 121 in different regions of the at least one heating film 12, the resistance density in each region of the at least one heating film 12 may be controlled, thereby further controlling the power density of the at least one heating film 12 in each region. As a result, when the at least one heating film 12 is powered, heating power of at least two heating regions may be different, which forms multiple regions with different temperatures, thereby allowing for a purposeful design of a position of the high-temperature region in the accommodating structure 11 that is suitable for the atomization of the aerosol generating substance 2 and increasing the aerosol generation rate. Furthermore, the resistance density of the at least one heating film 12 in the first region A is ensured to be greater than the resistance density of the at least one heating film 12 in the second region B, which enables the temperature of the first region A in the accommodating structure 11 to be higher than the temperature of the second region B in the accommodating structure 11, thereby effectively improving the atomization efficiency of the first region A and increasing the aerosol generation rate.

[0066] In a second embodiment, as shown in FIG. 14, FIG. 14 is a schematic cross-sectional view of a heating assembly according to the second embodiment of the present disclosure. The second embodiment provides a second type of heating assembly 10. The second type of heating assembly 10 is different from the heating assembly 10 provided by the first embodiment in that the radiating layer 112 is disposed on an outer surface of the side wall of the substrate 111.

[0067] In the second embodiment, as shown in FIG. 14, when the radiating layer 112 is an insulating radiating layer 112, the at least one heating film 12 is disposed on a surface of a side of the radiating layer 112 away from the substrate 111. When the at least one heating film 12 is powered, the thermal energy generated by the at least one heating film 12 is directly conducted to the radiating layer 112. The radiating layer 112 is heated to generate the infrared ray. The infrared ray penetrates the substrate 111 that is transparent and enters the accommodating chamber 110 to heat the aerosol generating substance 2 accommodated in the accommodating chamber 110. In the second embodiment, the aerosol generating substance 2 may be directly in contact with the transparent substrate 111, enabling the thermal energy from the substrate 111 to be directly conducted to the aerosol generating substance 2 for heating. Alternatively, the aerosol generating substance 2 may be spaced apart from the substrate 111.

[0068] When the radiating layer 112 is made of a non-insulating material, as shown in FIG. 15, FIG. 15 is a schematic cross-sectional view of a heating assembly according to some other embodiments of the present disclosure. To avoid a short circuit of the at least one heating film 12, a second insulating layer 114 is disposed on a surface of the radiating layer 112 away from the substrate 111. The second insulating layer 114 is disposed between the radiating layer 112 and the at least one heating film 12.

[0069] In a third embodiment, as shown in FIG. 16, FIG. 16 is a schematic cross-sectional view of a heating assembly according to the third embodiment of the present disclosure. The third embodiment provides yet another type of heating assembly 10. The yet another type of heating assembly 10 is different from the heating assembly 10 provided in the above embodiments in that the accommodating structure 11 includes the substrate 111.

[0070] The substrate 111 is in shape of a hollow tube. The substrate 111 includes a main body and an infrared radiation material dispersed within the main body. The main body defines the accommodating chamber 110 and the near-end opening communicated with the accommodating chamber 110, to accommodate the aerosol generating substance 2. When the substrate 111 is heated, the substrate 111 radiates the infrared ray to heat the aerosol generating substance 2. It can be understood that in the third embodiment, the substrate 111 itself radiates the infrared ray when the substrate 111 is heated, and no additional infrared layer is disposed on the surface of the substrate 111. In some embodiments, the substrate 111 may be a quartz tube.

[0071] In some embodiments, to increase the amount of infrared ray being radiated and the heating speed, a radiating infrared layer may further be disposed on the surface of the substrate 111, which may refer to the embodiments above and will not be repeated herein.

[0072] The above are only some embodiments of the present disclosure and may not limit the scope of the present disclosure. Any equivalent transformation in structures or process based on the description and drawings of the present disclosure, or a direct or indirect application of the description and drawings of the present disclosure in other related technical fields, may fall within the scope of the present disclosure for the same reason.

Claims

1. A heating assembly, comprising: an accommodating structure, comprising a near-end opening, and configured to accommodate an aerosol generating substance through the near-end opening and radiate an infrared ray to heat the aerosol generating substance in a case where the accommodating structure is heated; at least one heating film, linearly disposed on the accommodating structure, and configured to heat the accommodating structure in a case where the at least one heating film is powered, wherein at least a part of each of the at least one heating film extends along a length direction of the accommodating structure; and a power supply assembly, comprising a first electrode and a second electrode, wherein an end of each of the at least one heating film is electrically connected to the first electrode and the other end of each of the at least one heating film is electrically connected to the second electrode, enabling both the first electrode and the second electrode to supply power to the at least one heating film.

2. The heating assembly as claimed in claim 1, wherein the heating film comprises a plurality of heating lines, at least two of the plurality of heating lines are connected in parallel, and at least a part of each of the plurality of heating lines extends along the length direction of the accommodating structure.

3. The heating assembly as claimed in claim 2, wherein at least a part of the plurality of heating lines are curved lines.

4. The heating assembly as claimed in claim 3, wherein the curved lines are U-shaped or S-shaped.

5. The heating assembly as claimed in claim 3, wherein each of the plurality of heating lines extends along the length direction of the accommodating structure, each of the plurality of heating lines comprises a first end and a second end, the first end of a part of the plurality of heating lines is electrically connected to the first electrode, the second end of the part of the plurality of heating lines is electrically connected to the second end of a remaining part of the plurality of heating lines, and the first end of the remaining part of the plurality of heating lines is electrically connected to the second electrode.

6. The heating assembly as claimed in claim 5, wherein the heating film further comprises a first electrically connecting part extending along a circumferential direction of the accommodating structure, and the second end of each of the plurality of heating lines is electrically connected to the first electrically connecting part.

7. The heating assembly as claimed in claim 6, wherein the heating film further comprises: a second electrically connecting part, wherein the first end of each of the part of the plurality of heating lines is electrically connected to the second electrically connecting part, enabling the first end of the part of the plurality of heating lines to be electrically connected to the first electrode through the second electrically connecting part; and / or a third electrically connecting part, wherein the first end of each of the remaining part of the plurality of heating lines is electrically connected to the third electrically connecting part, enabling the first end of the remaining part of the plurality of heating lines to be electrically connected to the second electrode through the third electrically connecting part.

8. The heating assembly as claimed in claim 7, wherein the heating film further comprises a first heating line, a second heating line, a third heating line, and a fourth heating line; the first heating line and the second heating line are connected in parallel between the first electrode and the first electrically connecting part, and the third heating line and the fourth heating line are connected in parallel between the second electrode and the first electrically connecting part.

9. The heating assembly as claimed in claim 8, wherein each of the plurality of heating lines is U-curved.

10. The heating assembly as claimed in claim 9, wherein the plurality of heating lines are symmetrically disposed with respect to a central axis along a width direction of the heating film, and any adjacent two of the plurality of heating lines are symmetrically arranged along another central axis therebetween.

11. The heating assembly as claimed in claim 3, wherein an end of each of the plurality of heating lines is electrically connected to the first electrode, and the other end of each of the plurality of heating lines is electrically connected to the second electrode.

12. The heating assembly as claimed in claim 11, wherein each of the plurality of heating lines comprises a first part, a second part, and a third part that are sequentially connected to each other; each of the first part and the third part extends along the length direction of the accommodating structure, one of the first part and the third part is electrically connected to the first electrode, the other one of the first part and the third part is electrically connected to the second electrode, and the second part extends along a circumferential direction of the accommodating structure.

13. The heating assembly as claimed in claim 11, wherein the heating film comprises a first heating line and a second heating line that are connected in parallel; a first part of the first heating line is a curved line, each of a second part and a third part of the first heating line is a straight line; and each of a first part, a second part, and a third part of the second heating line is a straight line.

14. The heating assembly as claimed in claim 13, wherein a length of the second heating line is greater than a length of the first heating line, and the second heating line surrounds a periphery of the first heating line.

15. The heating assembly as claimed in claim 1, wherein the first electrode and the second electrode are disposed on a same end of the accommodating structure.

16. The heating assembly as claimed in claim 1, wherein the at least one heating film is configured to have different power densities on both sides of a midpoint along the length direction of the accommodating structure.

17. The heating assembly as claimed in claim 16, wherein a surface of the accommodating structure is divided into a first region and a second region by a plane that is perpendicular to the length direction of the accommodating structure and penetrates through the midpoint, and the second region is located at a side of the first region away from the near-end opening; and a power density of the at least one heating film in the first region is greater than a power density of the at least one heating film in the second region.

18. An aerosol generating device, comprising: the heating assembly as claimed in any one of claims 1-17; and a power source assembly, electrically connected to the heating assembly and configured to supply power to the heating assembly.

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