Aerosol-generating device

Abstract

The utility model belongs to the technical field of electronic atomization, and provides an aerosol generating device which comprises a shell, and an opening is formed in the first end of the shell; the atomization assembly is provided with a containing cavity used for containing an aerosol generating base material, and the opening is communicated with the containing cavity; the airflow channel comprises a partial gap between the shell and the atomization assembly, and the airflow channel is communicated with the opening; the airflow sensor is separated from the airflow channel through a thin film, and a sealed cavity is formed between the airflow sensor and the thin film. According to the aerosol generating device, the thin film is arranged between the airflow sensor and the airflow channel for separation, the sealed cavity is formed between the airflow sensor and the thin film, the thin film is adsorbed and deforms during suction, the sensing film of the airflow sensor in the sealed cavity deforms accordingly, and the sensitivity of the airflow sensor is improved; and the induction to the suction action is more sensitive.

Description

Technical Field

[0001] The present application belongs to the field of electronic atomization technology, and more specifically, relates to an aerosol generating device. Background Art

[0002] In electronic atomizer devices, an airflow sensor is typically installed in the air intake duct. It controls the atomizer's operation by sensing airflow changes. With this structure, the airflow sensor's sensing membrane is directly connected to the outside air, making it susceptible to interference from external airflow. The airflow sensor cannot directly sense the internal negative pressure generated by the user's inhalation, resulting in low sensitivity. Utility Model Content

[0003] An object of the embodiments of the present application is to provide an aerosol generating device that is sensitive to the puffing action.

[0004] To achieve the above objectives, the technical solution adopted in this application is to provide an aerosol generating device, comprising:

[0005] a housing having an opening at a first end;

[0006] an atomizing assembly disposed in the housing, wherein a receiving cavity for accommodating an aerosol-generating substrate is provided in the atomizing assembly, and the opening is in communication with the receiving cavity;

[0007] an air flow channel, comprising a portion of the gap between the housing and the atomizing assembly, the air flow channel being in communication with the opening;

[0008] The airflow sensor is separated from the airflow channel by a film, and a sealed cavity is formed between the airflow sensor and the film.

[0009] In one embodiment, the air flow channel is provided with a tapered opening with a gradually decreasing width, and the atomizing assembly is coaxially provided with a accommodating cavity directly below the tapered opening, the accommodating cavity forms a part of the air flow channel, and the film is partially or completely accommodated in the accommodating cavity.

[0010] In one embodiment, the central axis of the tapered opening and the central axis of the accommodating cavity are located on the same axis, and the airflow sensor is arranged opposite to the tapered opening.

[0011] In one embodiment, the film is bent toward the tapered opening.

[0012] In one embodiment, the longitudinal cross-section of the film is Ω-shaped.

[0013] In one embodiment, the air flow channel includes a first air flow channel and a second air flow channel, and the second end of the first air flow channel and the second end of the second air flow channel merge at the air outlet of the atomizer assembly.

[0014] In one embodiment, a first seal is connected to the bottom of the atomizer assembly, the periphery of the film is connected to the inner wall of the first seal, the film, the inner wall of the first seal and the airflow sensor form the sealed cavity, and the airflow sensor is at least partially accommodated in the first seal.

[0015] In one embodiment, a second seal is provided on the outer side of the airflow sensor, the axial ends of the second seal are open, the outer circumferential wall of the second seal is in sealing contact with the inner circumferential wall of the first seal, and the inner circumferential wall of the second seal is in sealing contact with the outer circumferential wall of the airflow sensor.

[0016] In one embodiment, the first sealing member is provided with a through hole for the electrode pin of the atomizing assembly to pass through.

[0017] In one embodiment, the atomization assembly includes a heating tube, a first bracket and a second bracket, the shell is sleeved on the outside of the heating tube, the two ends of the heating tube are respectively fixed to the first bracket and the second bracket, and the two ends of the shell are respectively fixed to the first bracket and the first seal; the tapered mouth and the accommodating cavity are both formed in the second bracket, and a first air flow channel is formed between the inner wall of the shell and the outer wall of the heating tube, the gap between the first bracket and the aerosol-forming article forms the entrance of the first air flow channel, and the first air flow channel and the second air flow channel intersect and communicate at the bottom of the second bracket.

[0018] In one embodiment, an annular groove is provided on the upper end surface of the first sealing member, the bottom end of the housing is inserted into the annular groove, and the groove wall of the annular groove is in sealing cooperation with the housing.

[0019] In one embodiment, the second bracket includes a bracket tube and a base connected to the bottom of the bracket tube, the top of the bracket tube is connected and fixed to the heating tube, the tapered mouth is provided in the bracket tube, and the accommodating cavity extends from the base to the bracket tube.

[0020] In one embodiment, the air outlet is provided on the side wall of the bracket tube, the first air flow channel and the second air flow channel are connected through the air outlet, a convex ring is provided on the outer side wall of the base, and the first sealing member is sealingly sleeved on the outer side of the base and elastically sealed against the bottom surface of the convex ring.

[0021] The beneficial effect of the aerosol generating device provided by the present application is that, compared with the prior art, the aerosol generating device of the present application is provided with a thin film separating the airflow sensor and the airflow channel, and a sealed cavity is formed between the airflow sensor and the film. When inhaling, the film is adsorbed and deformed, causing the air pressure in the sealed cavity to change, and the sensing film of the airflow sensor sealed in the sealed cavity also deforms accordingly, thereby triggering the sensing function of the airflow sensor. With this structure, the sensitivity of the airflow sensor is improved, and it is more sensitive to the inhalation action. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0023] Figure 1 A three-dimensional diagram of an aerosol generating system provided in an embodiment of the present application;

[0024] Figure 2 for Figure 1 a cross-sectional view of the aerosol generating system shown;

[0025] Figure 3 A three-dimensional diagram of an aerosol generating device provided in an embodiment of the present application;

[0026] Figure 4 for Figure 3 a cross-sectional view of the aerosol generating device shown;

[0027] Figure 5 for Figure 3 a partial cross-sectional view of the aerosol generating device shown;

[0028] Figure 6 for Figure 3 a perspective view of a first sealing member in the aerosol generating device;

[0029] Figure 7 for Figure 3 Exploded view of the aerosol generating device shown.

[0030] Among them, the reference numerals in the figures are:

[0031] 1-Aerosol generating system; 2-Aerosol generating device; 10-Aerosol-forming article; 11-Aerosol-generating substrate; 12-Mouthpiece; 100-Airflow channel; 101-First airflow channel; 102-Second airflow channel; 103-Sealing cavity; 104-Tapered opening; 105-Accommodating cavity; 106-Air inlet; 107-Air outlet; 108-Constant diameter section; 20-Housing; 30-Atomizing assembly; 40-Airflow sensor; 50-Thin film; 60-First sealing member; 70-Second sealing member; 201-First end; 202-second end; 21-convex ring; 210-vent groove; 211-third fixing groove; 310-accommodating chamber; 31-first bracket; 32-second bracket; 33-heating tube; 310-protrusion; 311-second fixing groove; 320-bracket tube; 3201-convex strip; 3202-first fixing groove; 3203-limiting step; 321-base; 3210-convex ring; 330-electrode pin; 41-electrode pin; 61-through hole; 62-annular groove; 63-second sealing rib; 71-first sealing rib; 72-notch. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0033] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0034] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0036] Please also refer to Figures 1 to 3 , the aerosol generating system 1 provided in an embodiment of the present application is now described. The aerosol generating system 1 includes an aerosol-forming product 10 and an aerosol generating device 2. The aerosol-forming product 10 includes an aerosol-generating substrate 11 and a mouthpiece portion 12 for enabling a user to inhale air through the aerosol-generating substrate 11. The aerosol-forming product 10 is generally cylindrical and has an elongated shape. The aerosol-generating substrate 11 is generally cylindrical and has an elongated shape. The aerosol-generating substrate 11 can be a solid aerosol-generating substrate, or include both solid and liquid components. The aerosol generating device 2 includes a shell 20, an atomizing assembly 30, an airflow channel 100, and an airflow sensor 40. The shell 20 has a longitudinal axis and has an opening at a first end 201, and the other end opposite the shell 20 is a second end 202. The top end of the shell 20 is the first end 201 and the bottom end is the second end 202 . The first end and the second end described in other components may refer to the position and direction of the first end 201 and the second end 202 in the shell 20 .

[0037] See Figures 2 to 4 The atomizer assembly 30 is disposed within the housing 20. A receiving chamber 310 for accommodating the aerosol-generating substrate 11 is defined within the atomizer assembly 30. The opening at the first end of the housing 20 communicates with the receiving chamber 310. The receiving chamber 310 is configured to allow the aerosol-generating substrate 11 to contact the heating element of the atomizer assembly 30, thereby heating and volatilizing the aerosol-generating substrate 11.

[0038] The airflow channel 100 comprises part of the gap between the housing 20 and the atomizer assembly 30 and is connected to the opening at the top of the housing 20. The airflow channel 100 is configured to allow air drawn into the housing 20 to combine with the volatilized aerosol-generating substrate 11 to form an aerosol, and the aerosol can be inhaled into the user's mouth through the mouthpiece portion 12.

[0039] The airflow sensor 40 is separated from the airflow channel 100 by a film 50, forming a sealed cavity 103 between the airflow sensor 40 and the film 50. The sensing membrane of the airflow sensor 40 is located within the sealed cavity 103, with the film 50 positioned between the airflow channel 100 and the airflow sensor 40. During suction, the film 50 is attracted and deforms, causing the air pressure within the sealed cavity 103 to change, which in turn causes the sensing membrane of the airflow sensor 40 to deform, triggering the sensing function of the airflow sensor 40. This improves the sensitivity of the airflow sensor 40.

[0040] Compared with the prior art, the aerosol generating device 2 provided in the present application has a film 50 provided between the airflow sensor 40 and the airflow channel 100 to separate them, and a sealed cavity 103 is formed between the airflow sensor 40 and the film 50. During inhalation, the film 50 is adsorbed and deformed, causing the air pressure in the sealed cavity 103 to change, and the sensing film of the airflow sensor 40 sealed in the sealed cavity 103 also deforms accordingly, thereby triggering the sensing function of the airflow sensor 40. With this structure, the sensitivity of the airflow sensor 40 is improved, and it is more sensitive to the inhalation action.

[0041] See Figure 2 、 Figure 4 and Figure 5 The airflow channel 100 is provided with a tapered opening 104 having a gradually decreasing width. The atomizer assembly 30 is provided with a receiving chamber 105 directly below the tapered opening 104. The receiving chamber 105 constitutes a portion of the airflow channel 100 and is coaxially arranged with the tapered opening 104. A portion or all of the film 50 is accommodated in the receiving chamber 105.

[0042] The central axis of the tapered opening 104 and the central axis of the receiving cavity 310 are coaxial, and the airflow sensor 40 is disposed opposite the tapered opening 104. In other words, the tapered opening 104, the receiving cavity 310 and the airflow sensor 40 are coaxially arranged.

[0043] The air flow channel 100 includes a first air flow channel 101 and a second air flow channel 102. The second end of the first air flow channel 101 and the second end of the second air flow channel 102 converge at an air outlet 107 of the atomizer assembly 30. The air outlet 107 of the atomizer assembly 30 is located near the bottom and is connected to the accommodating chamber 105. The accommodating chamber 105 constitutes a part of the second air flow channel 102.

[0044] The film 50 is configured to bend toward the tapered opening 104. The cross-sectional area of the film 50 gradually decreases from bottom to top, meaning that the film 50 bends and concaves toward the tapered opening 104 of the second airflow channel 102, forming a shape that is smaller at the top and larger at the bottom. During inhalation, this curved film 50 is more likely to bend and deform toward the tapered opening 104, which easily creates negative pressure within the sealed cavity 103. This also makes the sensing membrane of the airflow sensor 40 within the sealed cavity 103 more susceptible to deformation, effectively improving the sensitivity of the airflow sensor 40.

[0045] The longitudinal cross-section of the film 50 is Ω-shaped, that is, the film 50 includes a first part and a second part connected to each other, the first part is in an inverted U-shape and is accommodated in the accommodating cavity 105, and the second part extends out of the accommodating cavity 105 and is connected to the inner side wall of the first sealing member 60. The second part is less curved, and the connection between the first part and the second part is smoothly transitioned. The second part is bent obliquely downward near the connection with the first part toward the center axis of the film 50.

[0046] A first sealing member 60 is connected to the bottom of the atomizer assembly 30, and the periphery of the film 50 is connected to the inner wall of the first sealing member 60. The airflow sensor 40 is at least partially housed within the first sealing member 60. The film 50, the first sealing member 60, and the airflow sensor 40 together form a sealed cavity 103 that seals the airflow sensor 40. The sensing membrane of the airflow sensor 40 is located within the sealed cavity 103. The second airflow channel 102 is arranged near the center of the bottom of the atomizer assembly 30. The airflow sensor 40 is positioned directly opposite the inlet at the bottom of the second airflow channel 102 of the atomizer assembly 30, and the film 50 is located between the inlet and the airflow sensor 40.

[0047] The aerosol generating device 2 is a heating-not-burning device. The atomizing component 30 is open at both ends of the axis. The aerosol-forming product 10 can be inserted from the entrance at the top thereof and contact the heating unit. The heating unit in the atomizing component 30 can be a heating plate with a cylindrical structure or a heating cylinder surrounded by multiple heating plates, or a heating wire wound around the outer periphery of the cylinder to form a circumferential heating structure. The heating unit can also include an internal heating element and an external heating element. The external heating element can be in the form of a heating cylinder, and the internal heating element can be in the form of one or more heating needles or heating strips passing through the center of the aerosol generating substrate. Since the film 50 is elastic, the film 50 is between the second airflow channel 102 and the airflow sensor 40. When inhaled, the film 50 is adsorbed and deformed, the air pressure in the sealed cavity 103 changes, and the sensing membrane of the airflow sensor 40 is deformed accordingly, thereby triggering the sensing function of the airflow sensor 40, which can improve the sensitivity of the airflow sensor 40.

[0048] The first sealing member 60 and the film 50 can be integrally formed. The film 50 can also be a separate component, with the periphery of the film 50 connected to the inner circumferential wall of the first sealing member 60. The film 50, the inner circumferential wall of the first sealing member 60, and the airflow sensor 40 together form a sealed cavity, within which the sensing membrane of the airflow sensor 40 is located.

[0049] A constant diameter section 108 is also provided between the tapered opening 104 and the accommodating chamber 105. The tapered opening 104, the accommodating chamber 105, the film 50, the first sealing member 60, and the airflow sensor 40 are all coaxially arranged. The tapered opening 104 is larger at the top and smaller at the bottom. The diameter of the bottom of the tapered opening 104 is equal to the diameter of the constant diameter section 108, while the diameter of the accommodating chamber 105 is greater than the diameter of the constant diameter section 108. By providing the tapered opening 104 at the bottom of the second airflow channel 102, the airflow velocity at the tapered opening 104 is relatively high during suction, making it easier for the film 50 to be adsorbed, thereby making it easier for the air pressure within the sealed chamber 103 to change, further improving the sensitivity of the airflow sensor 40.

[0050] See Figure 4 and Figure 5 A second sealing member 70 is sleeved around the outer periphery of the airflow sensor 40. The second sealing member 70 is open at both axial ends. The outer peripheral wall of the second sealing member 70 is in sealing contact with the inner peripheral wall of the first sealing member 60, and the second sealing member 70 is at least partially contained within the first sealing member 60. The inner peripheral wall of the second sealing member 70 is in sealing contact with the outer peripheral wall of the airflow sensor 40, that is, the airflow sensor 40 is sealed within the first sealing member 60 by means of the second sealing member 70. The second sealing member 70 also forms a sealing structure with the first sealing member 60. In this way, a sealed cavity 103 with stable airtightness is formed between the film 50 and the first sealing member 60, preventing external airflow or debris from entering the sealed cavity 103. The first sealing member 60 and / or the second sealing member 70 can be made of sealing silicone.

[0051] See also Figure 4 、 Figure 5 、 Figure 7 The sidewall of the second sealing member 70 is provided with a notch 72 through which the electrode pins 41 of the airflow sensor 40 extend. It is understood that a corresponding number of perforations may also be provided on the sidewall of the second sealing member 70 near the bottom for the electrode pins 41 to extend. The electrode pins 41 of the airflow sensor 40 are electrically connected to the circuit board within the aerosol generating device 2. A first sealing rib 71 is provided on the outer peripheral wall of the second sealing member 70, and the first sealing rib 71 is in sealing contact with the inner peripheral wall of the first sealing member 60. A sealing rib may also be provided on the inner peripheral wall of the second sealing member 70, and the sealing rib is in sealing contact with the outer peripheral wall of the airflow sensor 40.

[0052] See also Figure 3 、 Figure 6 The first sealing member 60 defines through-holes 61 for the electrode pins 330 of the atomizer assembly 30 to pass through. The number of through-holes 61 is equal to the number of electrode pins 330, and the positions of the two are arranged in a one-to-one correspondence. After passing through the through-holes 61, the electrode pins 330 of the atomizer assembly 30 are connected to the power supply assembly of the aerosol generating device 2, thereby powering the heating unit of the atomizer assembly 30.

[0053] See Figure 2 、 Figure 4 、 Figure 5 and Figure 7 The atomization assembly 30 includes a first bracket 31, a second bracket 32 and a heating tube 33. The heating tube 33 forms a receiving chamber 310, and the shell 20 is sleeved on the outside of the heating tube 33. A first airflow channel 101 is formed between the inner wall of the shell 20 and the outer wall of the heating tube 33, that is, the first airflow channel 101 is formed between the tube wall of the shell 20 and the tube wall of the heating tube 33. The gap between the first bracket 31 and the aerosol-forming product 10 forms an air inlet 106 of the first airflow channel 101. The first bracket 31 and the second bracket 32 are both hollow structures with openings at both ends in the axial direction. The first bracket 31 is fixedly connected to the top of the heating tube 33 and the shell 20, and the second bracket 32 is fixedly connected to the bottom end of the heating tube 33. The receiving chamber 105 and the tapered opening 104 are both formed in the second bracket 32. An air outlet 107 is provided at the bottom of the second bracket 32, and both the air inlet 106 and the air outlet 107 are connected to the first air flow channel 101; the air outlet 107 is connected to the second air flow channel 102, so that the outside air enters the first air flow channel 101 from the air inlet 106, flows downward from the upper end of the heating tube 33 along the tube wall of the heating tube 33 to the lower end of the heating tube 33, then turns 180 degrees and enters the second air flow channel 102 to form a U-shaped airway, bringing out the gas in the aerosol generating substrate 11.

[0054] See Figure 4 、 Figure 6 The upper end surface of the first sealing member 60 is provided with an annular groove 62, into which the bottom end of the housing 20 is inserted, and the groove wall of the annular groove 62 is in sealing engagement with the housing 20. A second sealing rib 63 is protruded from the groove wall of the annular groove 62, and the second sealing rib 63 is in sealing contact with the housing 20, thus forming a stable sealing structure.

[0055] See Figures 2 to 5 Specifically, the heating tube 33 can be made of, but not limited to, ceramic material, and a temperature sensor can be provided on the outer wall of the heating tube 33 to facilitate control of the heating temperature. A plurality of electrode pins 330 are welded to the outer wall of the heating tube 33, and the electrode pins 330 pass through the first seal 60 and are electrically connected to the circuit board of the aerosol generating device 2. After the aerosol-forming product 10 is inserted into the heating tube 33 and inhaled, the airflow sensor 40 senses the inhalation action, and the heating tube 33 can heat it, so that the plant core in the aerosol generating substrate 11 is heated to a degree sufficient to emit aerosol. A first fixing groove 3202 is provided at the top of the second bracket 32, and the bottom end of the heating tube 33 is inserted into the first fixing groove 3202. The heating tube 33 is interference fit with the first fixing groove 3202, and the heating tube 33 is fixedly connected to the second bracket 32.

[0056] See Figures 2 to 4 The inner sidewall of the first bracket 31 is provided with a plurality of protrusions 310 at circumferential intervals. This allows a gap between the aerosol-forming article 10 and the first bracket 31 after insertion. The gap between the aerosol-forming article 10 and the first bracket 31 forms the air inlet 106. The inner sidewall of the first bracket 31 is provided with four arcuate protrusions at circumferential intervals. The arcuate protrusions extend along the axis of the first bracket 31 and are shaped to be larger in the middle and smaller on both sides. The surfaces that contact the aerosol-generating substrate 11 are arcuate surfaces. The bottom end of the first bracket 31 is provided with a second fixing groove 311 that adapts to the heating tube 33. The top end of the heating tube 33 is inserted into the second fixing groove 311. The heating tube 33 and the second fixing groove 311 have an interference fit, and the heating tube 33 is fixedly connected to the first bracket 31.

[0057] See Figure 4 、 Figure 5 and Figure 7 The shell 20 is a tubular body with both ends open in the axial direction. Specifically, it can be made of a pipe with good thermal insulation properties. A convex ring 21 is provided on the inner side wall of the shell 20 near the top. In this way, the shell 20 forms a third fixing groove 211 at the top that adapts to the first bracket 31. The first bracket 31 and the third fixing groove 211 have an interference fit, and the first bracket 31 is connected and fixed to the shell 20. The top surface of the convex ring 21 is provided with an L-shaped ventilation groove 210. The ventilation groove 210 includes a first section extending radially and a second section extending axially. In this way, the outside air passes through the air inlet 106 and then enters the first air flow channel 101 through the ventilation groove 210 of the convex ring 21.

[0058] The second bracket 32 includes a bracket tube 320 and a base 321 connected to each other. The bracket tube 320 and the base 321 are both hollow structures. The bracket tube 320 and the base 321 are integrally formed and coaxially arranged, and the base 321 is located at the bottom of the bracket tube 320. The top of the bracket tube 320 is fixed to the heating tube 33 by clamping, the tapered mouth 104 is provided in the bracket tube 320 near the bottom, and the equal diameter section 108 is located at the bottom of the bracket tube 320. The accommodating chamber 105 extends from the base 321 to the bracket tube 320, that is, the inner circumferential wall of the base 321 and the inner circumferential wall of the bottom end of the bracket tube 320 together form the accommodating chamber 105.

[0059] At least one air outlet 107 is provided on one end of the side wall of the support tube 320 near the base 321. The support tube 320 is provided with a plurality of air outlets 107 arranged in pairs, with two corresponding air outlets 107 symmetrically provided on the side wall of the support tube 320. The first air flow channel 101 and the second air flow channel 102 are connected through each air outlet 107. Figure 2 、 Figure 3 and Figure 5During inhalation, outside air enters from the first bracket 31, then flows downward from the air inlet 106 of the shell 20 along the first air flow channel 101, flows through the air outlets 107 to the accommodating cavity 105, then enters the equal-diameter section 108 and the tapered opening 104 in sequence, and finally enters from the bottom of the aerosol generating article. After the heating tube 33 heats the aerosol generating substrate 11, the air inhaled into the shell 20 combines with the volatilized aerosol generating substrate 11 to form an aerosol, which is then inhaled into the user's mouth through the mouthpiece portion 12 at the top.

[0060] See Figure 2 、 Figure 4 、 Figure 5 and Figure 7 The inner sidewall of the support tube 320 is provided with a plurality of ridges 3201 at annular intervals. When the aerosol-generating substrate 11 is inserted into the heating tube 33 and extends into the support tube 320, the aerosol-generating substrate 11 contacts the surface of each ridge 3201. The ridges 3201 are relatively thin, and the provision of the ridges 3201 can reduce the contact area between the aerosol-generating substrate 11 and the support tube 320, thereby reducing the difficulty of inserting the aerosol-generating substrate 11 into the atomizer assembly 30. That is, only a small amount of force is required to insert the aerosol-generating substrate 11 into the atomizer assembly 30. The inner sidewall of the support tube 320 forms a limiting step 3203. When the aerosol-generating substrate 11 is inserted into the support tube 320, the deepest position it can be inserted is the top surface of the limiting step 3203. The inner diameter of the limiting step 3203 is equal to the maximum upper diameter of the top of the tapered opening 104, that is, the top of the tapered opening 104 extends to the top surface of the limiting step 3203.

[0061] See Figure 2 、 Figure 5 、 Figure 7 The outer wall of the base 321 is provided with a raised ring 3210, the outer diameter of which is smaller than the inner diameter of the housing 20. The first seal 60 is sealedly sleeved on the outer side of the base 321. The first seal 60 elastically seals against the bottom surface of the raised ring 3210, thus forming a sealed fit between the first seal 60 and the base 321. The first seal 60 also seals against the housing 20, preventing outside air from flowing into the housing 20 from between the first seal 60 and the housing 20. The airflow in the first airflow channel 101 cannot flow from between the base 321 and the first seal 60 to the space provided with the film 50, thereby ensuring the sealing performance of the two joints. The outer periphery of the raised ring 3210 of the base 321 is provided with a notch 72 to avoid the electrode pin 330 of the heating tube 33. The electrode pin 330 of the heating tube 33 passes through the notch 72 and the through hole 61 of the first seal 60 and is electrically connected to the circuit board.

[0062] The aerosol generating device 2 also includes a housing (not shown), in which the atomizing assembly 30, the airflow sensor 40, the first sealing member 60, and the second sealing member 70 are all housed. It is understood that a portion of the first bracket 31 in the atomizing assembly 30 may also extend out of the housing. An electrically connected circuit board and battery are also provided in the housing. Multiple electrode pins 330 are welded to the outer wall of the heating tube 33. The electrode pins 41 of the airflow sensor 40 and the electrode pins 330 of the heating tube 33 are both electrically connected to the circuit board.

[0063] It can be understood that the aerosol generating device 2 can also be other types of atomizing devices, not limited to the above-mentioned heating without burning devices. For example, the atomizing component 30 can adopt a structure with a liquid storage tank, and the structure of the heating unit of the atomizing component 30 can be changed accordingly. The film 50 and the airflow sensor 40 described in the above embodiment are arranged at the bottom of the second airflow channel of the atomizing component, which can also achieve the purpose of improving the sensitivity of the airflow sensor.

[0064] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. An aerosol generating device, characterized in that: include: a housing (20), wherein the housing (20) has an opening at a first end (201); An atomizing assembly (30) is disposed in the housing (20), wherein a receiving chamber (310) for receiving an aerosol-generating substrate (11) is provided in the atomizing assembly (30), and the opening is in communication with the receiving chamber (310); an air flow channel (100), comprising a partial gap between the housing (20) and the atomizing assembly (30), the air flow channel (100) being in communication with the opening; An airflow sensor (40) is provided, wherein the airflow sensor (40) is separated from the airflow channel (100) by a film (50), and a sealed cavity (103) is formed between the airflow sensor (40) and the film (50).

2. The aerosol generating device according to claim 1, wherein: The air flow channel (100) is provided with a tapered opening (104) with a gradually decreasing width, and the atomizing assembly (30) is coaxially provided with a receiving cavity (105) directly below the tapered opening (104), wherein the receiving cavity (105) forms a part of the air flow channel (100), and the film (50) is partially or completely accommodated in the receiving cavity (105).

3. The aerosol generating device according to claim 2, wherein: The central axis of the tapered opening (104) and the central axis of the accommodating cavity (310) are located on the same axis, and the airflow sensor (40) is arranged facing the tapered opening (104).

4. The aerosol generating device according to claim 2, wherein: The film (50) bends in a direction close to the tapered opening (104).

5. The aerosol generating device according to claim 3, wherein: The longitudinal section of the film (50) is Ω-shaped.

6. The aerosol generating device according to claim 2, wherein: The airflow channel (100) comprises a first airflow channel (101) and a second airflow channel (102), wherein the second end of the first airflow channel (101) and the second end of the second airflow channel (102) converge at an air outlet (107) of the atomizing assembly (30).

7. The aerosol generating device according to claim 6, wherein: The bottom of the atomizing assembly (30) is connected to a first sealing member (60), the periphery of the film (50) is connected to the inner wall surface of the first sealing member (60), the film (50), the inner wall surface of the first sealing member (60) and the airflow sensor (40) form the sealed cavity (103), and the airflow sensor (40) is at least partially accommodated in the first sealing member (60).

8. The aerosol generating device according to claim 7, wherein: A second sealing member (70) is sleeved on the outer side of the airflow sensor (40), and the second sealing member (70) is open at both axial ends. The outer peripheral wall of the second sealing member (70) is in sealing contact with the inner peripheral wall of the first sealing member (60), and the inner peripheral wall of the second sealing member (70) is in sealing contact with the outer peripheral wall of the airflow sensor (40).

9. The aerosol generating device according to claim 7, wherein: The first sealing member (60) is provided with a through hole for the electrode pin (330) of the atomizing assembly (30) to pass through.

10. The aerosol generating device according to claim 7, wherein: The atomizing assembly (30) comprises a heating tube (33), a first bracket (31) and a second bracket (32); the shell (20) is sleeved on the outside of the heating tube (33); the two ends of the heating tube (33) are respectively fixed to the first bracket (31) and the second bracket (32); the two ends of the shell (20) are respectively fixed to the first bracket (31) and the first sealing member (60); the tapered opening (104) and the accommodating cavity (105) are both formed in the second bracket (32); a first airflow channel (101) is formed between the inner wall of the shell (20) and the outer wall of the heating tube (33); a gap between the first bracket (31) and the aerosol-forming article (10) forms an inlet of the first airflow channel (101); the first airflow channel (101) and the second airflow channel (102) intersect and communicate at the bottom of the second bracket (32).

11. The aerosol generating device according to claim 10, wherein: The upper end surface of the first sealing member (60) is provided with an annular groove (62), the bottom end of the housing (20) is inserted into the annular groove (62), and the groove wall of the annular groove (62) is sealed with the housing (20).

12. The aerosol generating device according to claim 10, wherein: The second bracket (32) comprises a bracket tube (320) and a base (321) connected to the bottom of the bracket tube (320); the top end of the bracket tube (320) is connected and fixed to the heating tube (33); the tapered opening (104) is provided in the bracket tube (320); and the accommodating cavity (105) extends from the base (321) to the bracket tube (320).

13. The aerosol generating device according to claim 12, wherein: The side wall of the bracket tube (320) is provided with the air outlet (107), the first air flow channel (101) and the second air flow channel (102) are connected through the air outlet (107), the outer wall of the base (321) is provided with a convex ring (3210), and the first sealing member (60) is sealingly sleeved on the outer side of the base (321) and elastically sealed against the bottom surface of the convex ring (3210).

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