CN113729308A

CN113729308A - Suction nozzle assembly, heater and aerosol generating device

Info

Publication number: CN113729308A
Application number: CN202111205556.0A
Authority: CN
Inventors: 张春华
Original assignee: Beijing Wenzhi Technology Co Ltd
Current assignee: Beijing Wenzhi Technology Co Ltd
Priority date: 2021-10-15
Filing date: 2021-10-15
Publication date: 2021-12-03

Abstract

The present invention relates to a nozzle assembly for detachable connection with a heater to form an aerosol-generating device, a heater and an aerosol-generating device, the nozzle assembly comprising: a housing having first and second opposing open ends forming a first air flow passage therebetween; the base is connected with the second opening end of the shell, an air inlet pipe extending in the direction far away from the second opening end is arranged on the base, and the air inlet pipe is provided with a second air flow channel communicated with the first air flow channel; the base is also provided with a magnetic part with attraction force with the heater; when the suction nozzle component is connected with the heater, at least part of the air inlet pipe is tightly inserted in the heater, and the magnetic part is attracted with the heater by magnetic force. The suction nozzle component and the heater are connected in different forms through the air inlet pipe and the magnetic part, so that the suction nozzle component and the heater cannot be easily displaced relatively.

Description

Suction nozzle assembly, heater and aerosol generating device

Technical Field

The invention relates to the technical field of atomization, in particular to a suction nozzle assembly, a heater and an aerosol generating device.

Background

The aerosol is formed by taking solid or liquid as dispersoid and taking gas as dispersion medium, and can be absorbed by human body through respiratory system, therefore, some atomization media such as medical products or cigarette cream can be heated by the aerosol generating device to form aerosol, thereby providing for user to use.

Taking a heating non-combustion smoking set on the existing market as an example, as aerosol generated by burning of the traditional smoking set is harmful to human bodies, the heating non-combustion smoking set generates aerosol in a heating and baking mode as a substitute of the traditional smoking set, and compared with the traditional smoking set, harmful components generated by burning and thermal degradation can be reduced. Existing heated non-combustible smoking articles typically include a mouthpiece component and a heating component through which aerosol generated within the heating component is drawn by the smoker or escapes through an outlet of the mouthpiece component. The suction nozzle device and the heating device are generally connected in a threaded manner to be convenient to disassemble, but the threaded connection is easy to cause thread abrasion and the like to cause connection failure, so that aerosol generated in the heating device leaks from the connection part of the suction nozzle device and the heating device, and the service life of the heating non-combustion smoking set is also shortened.

Disclosure of Invention

In view of the above, it is necessary to provide a nozzle assembly, a heater and an aerosol generating apparatus in order to solve the problem of unstable connection of the nozzle device and the heating device.

A mouthpiece assembly for detachable connection with a heater to form an aerosol-generating device, comprising: a housing having first and second opposing open ends forming a first air flow passage therebetween; the base is connected with the second opening end of the shell, an air inlet pipe extending in the direction far away from the second opening end is arranged on the base, and the air inlet pipe is provided with a second air flow channel communicated with the first air flow channel; the base is arranged at one end of the air inlet pipe and is provided with a magnetic part with attraction force with the heater; when the suction nozzle component is connected with the heater, at least part of the air inlet pipe is tightly inserted in the heater, and the magnetic part is attracted with the heater by magnetic force.

Through set up the intake pipe and the magnetic part of protrusion in the base on the suction nozzle subassembly, when suction nozzle subassembly and heater connection, the intake pipe is inserted and is established formation relation of connection in the heater, and magnetic part and heater magnetism actuation have simultaneously guaranteed the stability of being connected between suction nozzle subassembly and the heater, and easily dismantle low cost.

In one embodiment, the magnetic part and the air inlet pipe are positioned on two sides of the central axis of the base, and the distance from the central axis of the magnetic part to the central axis of the base is not greater than the distance from the central axis of the air inlet pipe to the central axis of the base.

In one embodiment, the surface of the air inlet pipe for matching with the heater is provided with a protrusion along the circumferential direction.

In one embodiment, the magnetic bearing further comprises a support, the support is located between the base and the shell, an oil storage cavity is defined between the base and the support, an oil filling hole communicated with the oil storage cavity is formed in the base, and the magnetic part is matched with the oil filling hole.

A heater for use in a detachable connection with a mouthpiece assembly configured to form an aerosol-generating device, comprising: a body having an opening to connect with a nozzle assembly; the heating pipe is positioned in the main body and communicated with the opening of the main body; and the suction piece is positioned in the main body, is arranged on two sides of the central axis of the main body in parallel with the heating pipe and is magnetically connected with the suction nozzle component.

In one embodiment, the distance from the central axis of the suction member to the central axis of the main body is not greater than the distance from the central axis of the heating pipe to the central axis of the main body.

In one embodiment, the heating pipe comprises a heating pipe body, and is characterized by further comprising a connecting piece, wherein the connecting piece is located in the heating pipe body and above the heating pipe, the connecting piece comprises a bottom plate, an avoiding hole communicated with the opening of the heating pipe body is formed in the position, corresponding to the heating pipe, on the bottom plate, and the attraction piece is arranged on the bottom plate.

In one embodiment, the lower surface of the bottom plate is provided with a fixing part, the central line of the fixing part coincides with the central line of the avoiding hole, and the fixing part is communicated with the avoiding hole.

In one embodiment, the heating tube further comprises a sealing element, one end of the sealing element is arranged around the fixing part, and the other end of the sealing element is arranged around the heating tube.

An aerosol-generating device comprising: the nozzle assembly of any of the above and the heater of any of the above; the suction nozzle assembly comprises a base, an air inlet pipe and a magnetic part are arranged on the base at a set interval, the heater comprises a main body, and a heating pipe and a suction part are arranged in the main body; when the suction nozzle component and the heater are in an assembled state, at least part of the air inlet pipe is directly inserted into the heating pipe, and the magnetic part is connected with the attraction part in a magnetic attraction mode.

Above-mentioned aerosol generation device sets up on the suction nozzle subassembly can directly stretch into in the heating pipe and with the heating pipe between have the intake pipe of mutual cooperation relation, sets up the magnetic part and the piece of inhaling that have mutual magnetic attraction effort simultaneously on suction nozzle subassembly and aerosol generation device for aerosol generation device has good connection stability on the whole.

Drawings

Fig. 1 is a schematic structural view of an aerosol-generating device according to an embodiment of the present invention in a disassembled state.

Figure 2 is a cross-sectional view of an aerosol-generating device in an embodiment of the invention in a disassembled state.

Figure 3 is a cross-sectional view of an aerosol-generating device in an assembled state according to an embodiment of the invention.

Detailed Description

This invention can be embodied in many different forms than those herein described and many modifications may be made by those skilled in the art without departing from the spirit of the invention.

In the description of the present invention, the terms "vertical", "horizontal", "upper", "lower", "left", "right", "center", "front", "rear", "length", and the like are used to indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, only for the convenience of description of the present invention and for simplicity of description. The first feature may be directly on or directly under the second feature or may be indirectly on or directly under the second feature via intervening media.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise specifically stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can be either fixedly connected or detachably connected, mechanically connected or electrically connected. When an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Referring to fig. 1, fig. 1 is an exploded view of an aerosol-generating device according to an embodiment of the present invention, which includes a heater 100 and a nozzle assembly 200, wherein the heater 100 is detachable with respect to the nozzle assembly 200. The heater 100 is arranged to heat a product 300 comprising an aerosol-forming substrate to cause the product 300 to release an aerosol; the aerosol generated within the heater 100 is drawn by the user through the nozzle assembly 200 connected thereto or escapes from the nozzle assembly 200 to be smelled by the user.

Products 300 containing aerosol-forming substrates such as cigarettes, tobacco derivatives and the like; or other products that can generate an aerosol upon heating, such as solid air fresheners, medical solutions/ointments, and the like.

The aerosol generated during the heat-baking process of the product 300 comprising the aerosol-forming substrate is relatively hot and the mouthpiece assembly 200 also acts as a smoking tool and at the same time cools the hot aerosol passing through.

Referring to fig. 1, the nozzle assembly 200 includes a housing 210 and a base 230 connected in sequence, and when the nozzle assembly 200 is connected to the heater 100, the base 230 is received in the positioning cavity 105 of the heater 100 to enable the nozzle assembly 200 to be quickly assembled with the heater 100, and the base 230 is coarsely positioned in the front-rear and left-right directions. Aerosol generated by the heater 100 flows through the base 230 into the housing 210 for inhalation by a user.

Referring to fig. 2, fig. 2 is a sectional view illustrating a heater 100 and a nozzle assembly 200 in a disassembled state according to an embodiment of the present invention. The housing 210 has a first opening end 211 and a second opening end 212 opposite to each other, the first opening end 211 is provided with a smoke outlet 213, and the second opening end 212 is connected to the base 230. The first open end 211 and the second open end 212 define a first gas flow path 201 therebetween for aerosol to flow through. The base 230 communicates with the first air flow path 201 of the housing 210. The base 230 has an inlet end 231 and an outlet end 232, the inlet end 231 is used for interfacing with an aerosol outlet port in the heater 100, and the outlet end 232 is connected to the housing 210 and communicates with the second open end 212.

The base 230 has a substantially profile-shaped cross-section, wherein the profile-shaped vertical portion is a circumferential sidewall of the base 230, and the profile-shaped horizontal portion is an air intake end 231 of the base 230.

Referring to fig. 2, an intake pipe 241 is disposed on the intake end 231, and the intake pipe 241 is disposed to extend from the lower end surface of the intake end 231 in a direction away from the housing 210. The heating pipe 101 is provided in the heater 100 at a position corresponding to the position of the inlet pipe 241. When the nozzle assembly 200 is mounted on the heater 100, the air inlet pipe 241 at least partially extends into the heating pipe 101 directly and forms a close fit with the inner wall of the heating pipe 101, so that the nozzle assembly 200 and the heater 100 form a stable connection. As will be described further below.

Referring to fig. 1 and 2, the outer surface of the inlet pipe 241 is provided with a protrusion 243 in a circumferential direction. The protrusion 243 is disposed on the surface of the inlet pipe 241, so as to ensure that the protrusion 243 is tightly attached to the inner wall of the heating pipe 101 when the inlet pipe 241 extends into the heating pipe 101. In the present embodiment, the protrusion 243 is provided at the lower end of the intake pipe 241, i.e., at a position close to the intake port of the intake pipe 241; the projection 243 may also be provided in the entire length direction of the intake pipe 241.

The protrusion 243 has elasticity, and may be made of a material having elastic restoring force, such as a silicone material. The protrusion 243 may be a ring-shaped structure disposed circumferentially around the air inlet pipe 241 or a spiral-shaped structure disposed circumferentially around the air inlet pipe 241.

When the air inlet pipe 241 and the heating pipe 101 are assembled, the protrusion 243 on the outer surface of the air inlet pipe 241 is elastically deformed, and after the assembly is completed, the protrusion 243 is tightly abutted to the inner wall of the heating pipe 101 in the process of recovering the elastic deformation, so that a gap between the air inlet pipe 241 and the heating pipe 101 is sealed, and aerosol at the outlet of the heating pipe 101 can completely flow into the air inlet pipe 241 and cannot escape. Compared with the direct opening on the base 230 and the butt joint with the outlet of the heating pipe 101, the air inlet pipe 241 extends into the heating pipe 101, so that the aerosol leakage is avoided, and the suction nozzle assembly 200 and the heater 100 can be stably connected.

The air inlet pipe 241 and the base 230 are integrally formed. In other embodiments, the air inlet pipe 241 and the base 230 may be a combined structure formed by separate elements and connected by other connecting methods such as adhesive bonding.

In the present embodiment, the intake pipe 241 is located on the left side of the center line of the base 230.

Referring to fig. 2, the inlet 231 is provided with a magnetic member 245. The magnetic member 245 is located at the right side of the center line of the base 230. The heater 100 may be provided with a suction member 103 having a magnetic attraction function with the magnetic member 245, corresponding to the position of the magnetic member 245. When the nozzle assembly 200 is mounted to the heater 100, the magnetic member 245 and the attraction member 103 are magnetically coupled to each other to secure coupling stability of the nozzle assembly 200 to the heater 100. As will be described further below.

The shape of the end surface of the magnetic member 245 for magnetic attraction can be selected from regular figures such as circle, rectangle or ellipse, etc. to reduce the manufacturing cost.

Referring to fig. 2, the distance between the central axis of the magnetic member 245 and the central axis of the base 230 is smaller than or equal to the distance between the central axis of the air inlet pipe 241 and the central axis of the base 230. The aerosol airflow generated in the heater 100 has an impact force, which is assumed to be F for convenience of description, and a distance between the central axis of the magnetic member 245 and the central axis of the base 230 is assumed to be L, and a moment applied to the magnetic member 245 is assumed to be M. When the impact force F is constant, the smaller the value of L, the smaller the moment applied. For the same object, the larger the moment, the easier the rotation state is to change; on the contrary, the rotation state is not easy to change and is kept in a stable state, so that the impact resistance is strong. Similarly, to ensure that the suction nozzle assembly 200 has stable states on both the left and right sides, the air inlet pipe 241 on the left side of the center line of the base 230 may be disposed at a position offset from the center line of the base 230 within a predetermined distance. Because the air inlet pipe 241 is tightly matched with the heating pipe 101, the distance between the central axis of the air inlet pipe 241 and the central axis of the base 230 can be slightly larger than that of the magnetic part 245, and the whole suction nozzle assembly 200 is ensured to have stronger impact resistance.

The suction nozzle assembly 200 has a relatively strong impact resistance, so that the suction nozzle assembly 200 is prevented from being displaced relative to the heater 100 when being impacted by high-temperature aerosol airflow, and the problem of low saturation of the aerosol coming out from the smoke outlet 213 due to the escape of the aerosol is avoided.

The housing 210 and the base 230 may be integrally formed, or may be two separate elements connected together. In the present embodiment, the housing 210 and the base 230 are independent elements, and are connected by means of engagement or the like. For example, the second open end 212 of the housing 210 is disposed at the air outlet end 232 of the base 230, i.e., the inner surface of the second open end 212 is attached to the outer surface of the air outlet end 232.

Referring to fig. 2, the nozzle assembly 200 further includes a bracket 250, wherein the bracket 250 is disposed between the housing 210 and the base 230 and is connected to the base 230 and the housing 250. The stent 250 has a structure with a cross-sectional shape approximating a "pi". The vertical sides of the "Π" -shaped configuration may be considered as circumferential side walls 251 of stent 250 and the horizontal sides of the "Π" -shaped configuration may be considered as spacer plates 252 of stent 250. The circumferential side wall 251 and the partition 252 enclose a cavity 253 which is open at one end. The partition 252 is provided with a through hole 254, and the through hole 254 communicates with the cavity 253. The partition 252 extends a set length toward the surface of the cavity 253 to form a hollow atomization tube 255. The central axis of the atomizing pipe 255 coincides with the central axis of the through-hole 254.

Referring to fig. 2, the oil guiding member 260 is connected to the atomizing pipe 255, the atomizing pipe 255 is provided with at least one oil outlet 257 in the circumferential direction, and at least a part of the oil guiding member 260 is exposed to the hollow area of the atomizing pipe 255 through the oil outlet 257. The oil guide 260 is made of porous material, such as microporous ceramic, microporous glass, cotton or fiber.

Referring to fig. 2, the lower end surface of the circumferential side wall 251 of the bracket 250 abuts against the inner end surface of the air inlet 231 of the base 230. The atomizing pipe 255 extends into the intake pipe 241. The outer surface of the atomizing tube 255 is attached to the inner surface of the inlet tube 241. Thus, a closed liquid storage cavity 205 is defined among the bracket 250, the base 230 and the atomizing pipe 255, and the liquid storage cavity 205 is used for storing tobacco tar or other liquid which can be atomized by high-temperature aerosol. When the liquid in the liquid storage cavity 205 soaks into the oil guide member 260 and is atomized under the action of the high-temperature aerosol, the liquid can flow out through the smoke outlet 213 along with the aerosol. Can help to improve the smell of the aerosol and simultaneously help to cool the high-temperature aerosol. A peg may be provided at the smoke outlet 213 to prevent dust or other contaminants from entering the nozzle assembly 200.

Sealing members such as sealing rings can be additionally arranged at the joint of the outer surface of the atomizing pipe 255 and the inner surface of the air inlet pipe 241, so that liquid in the liquid storage cavity 205 is prevented from seeping out due to gaps between the atomizing pipe 255 and the air inlet pipe 241.

Referring to fig. 2, the air inlet 231 of the base 230 is provided with an oil hole 233. The oil fill port 233 communicates with the reservoir chamber 205 to fill the reservoir chamber 205 with liquid. The center line of the oil hole 233 coincides with the center line of the magnetic member 245. The magnetic member 245 is fitted to the oil hole 233, and an additional space for accommodating the magnetic member 245 may not be required. The magnetic member 245 seals the oil filling hole 233 while having a corresponding coupling relation with the suction member 103 in the heater 100. In correspondence with the oil filler hole 233, the magnetic member 245 is substantially "T" -shaped, the vertical portion of the "T" being housed inside the oil filler hole 233; the horizontal portion of the "T" shape abuts against the end surface of the base 230 to facilitate its removal from the oil hole 233.

Referring to fig. 2, the heater 100 includes a main body 110 and a heating pipe 101, the heating pipe 101 is disposed in the main body 110, and the nozzle assembly 200 is connected to the main body 110. The heating tube 101 is used to receive a product containing an aerosol-forming substrate and heat bake it to produce an aerosol which flows from the heating tube 101 to a mouthpiece assembly 200 connected to the body 110.

Referring to fig. 2, a connecting member 130 is disposed at one end of the main body 110 for connecting the nozzle assembly 200, and the connecting member 130 is disposed in the main body 110 and close to the opening of the main body 110. The connecting member 130 is detachably connected to the main body 110 by means of a snap-fit. Inside the body 110, the connecting member 130 is located above the heating tube 101. The link 130 includes a circumferential wall 131 and a bottom plate 132, the bottom plate 132 is fixedly covered on a bottom end of the circumferential wall 131, and the cross-sectional shape of the link 130 is substantially "shaped". The circumferential wall 131 and the bottom plate 132 enclose the positioning cavity 105 for receiving the base 230 as described above. The shape of the inner sidewall of the connecting member 130 enclosing the positioning cavity 105 is matched with the shape of the base 230.

Referring to fig. 2, the bottom plate 132 of the connecting member 130 is provided with an avoiding hole 133. The central axis of the relief hole 133 coincides with the central axis of the heating pipe 101. The relief hole 133 provides an assembly passage for the connection of the inlet pipe 241 and the heating pipe 101. When the nozzle assembly 200 is mounted to the heater 100, one end of the air inlet pipe 241 provided on the base 230 of the nozzle assembly 200 extends into the heating pipe 101 through the escape hole 133. The bore size of the escape hole 133 is not smaller than the outer diameter size of the intake pipe 241.

Referring to fig. 2, the bottom plate 132 of the connecting member 130 is further provided with a fixing portion 135. The fixing portion 135 extends from the lower surface of the bottom plate 132 to a direction away from the bottom plate 132 by a predetermined length. The fixing portion 135 has an open hollow structure, such as a cylindrical structure, a center line of the fixing portion 135 and a center line of the avoiding hole 133 are located on the same straight line, and an inner diameter of the fixing portion 135 is the same as an aperture of the avoiding hole 133. When the nozzle assembly 200 is assembled with the heater 100, one end of the air inlet pipe 241 provided on the base 230 sequentially passes through the avoiding hole 133 and the fixing portion 135 and extends into the heating pipe 101.

Referring to fig. 2, the heater 100 further includes a sealing member 140. The sealing member 140 is, for example, a sealing ring having a predetermined length and is characterized by elastic deformation. The fixing portion 135 extends at least partially into the sealing member 140, and an end of the heating tube 101 adjacent to the connecting member 130 extends into the sealing member 140. That is, after the air inlet pipe 241 is assembled in the heating pipe 101, since the sealing member 140 forms a closed flow path with the heating pipe 101 and the fixing portion 135, the aerosol generated in the heating pipe 101 does not leak from the outlet of the heating pipe 101 or the like in the process of flowing into the mouthpiece assembly 200. In addition, the protrusion 243 arranged on the outer surface of the air inlet pipe 241 is tightly abutted to the inner wall of the heating pipe 101, so that aerosol leakage is avoided, and the concentration of the aerosol entering the suction nozzle assembly 200 is ensured.

Referring to fig. 2, the bottom plate 132 of the connecting member 130 is further provided with an attraction member 103 having a magnetic attraction effect with the magnetic member 245, and the attraction member 103 is located on the bottom plate 132 and vertically corresponds to the magnetic member 245. The engaging member 103 may be made of a magnetic material. The action surface of the engaging member 103 is adapted to the shape of the end surface of the magnetic member 245, and a regular pattern is selected. In conformity with the air inlet pipe 241 and the magnetic member 245 provided on the base 230, the distance from the central axis of the suction member 103 to the central axis of the main body 110 is not greater than the distance from the central axis of the heating pipe 101 to the central axis of the main body 110.

Referring to fig. 2, the bottom plate 132 is provided with a groove 137 for accommodating the engaging member 103, corresponding to the engaging member 103. The notched end of the recess 137 is chamfered so that the magnetic member 245 is coupled to the attraction member 103 in quick alignment.

Referring to fig. 3, when the heater 100 and the nozzle assembly 200 are assembled, the base 230 of the nozzle assembly 200 is accommodated in the positioning cavity 105, one end of the air inlet pipe 241 on the base 230 is inserted into the heating pipe 101, and the protrusions 243 on the peripheral surface of the air inlet pipe 241 are tightly fitted with the inner wall of the heating pipe 101, so that the air inlet pipe 241 not only has the function of stably connecting the nozzle assembly 200 and the heater 100, but also serves as an aerosol circulation channel to allow aerosol generated in the heating pipe 101 to enter the nozzle assembly 200. Meanwhile, the magnetic member 245 and the attraction member 103 attract each other, so that the heater 100 and the nozzle assembly 200 are stably coupled. On the other hand, the air inlet pipe 241 and the base 230 are integrally formed, so that the process is simple; the magnetic part 245 and the attraction part 103 only need to be paired, so that the cost is reduced.

Referring to figure 2, an energiser unit 150 is also provided within the body 110, the energiser unit 150 being arranged to energise the heating tube 101 to generate heat for baking a product containing an aerosol-forming substrate. The energy supply assembly 150 includes a rechargeable battery 151 and a PCB control board connected to each other, and the rechargeable battery 151 is disposed side by side at a position close to the heating pipe 101. The chargeable and dischargeable battery 151 is electrically connected to the heating pipe 101, and supplies power to or cuts off power from the heating pipe 101 under the control of the PCB control board.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A mouthpiece assembly for detachable connection with a heater to form an aerosol-generating device, comprising:

a housing having first and second opposing open ends forming a first air flow passage therebetween;

the base is connected with the second opening end of the shell, an air inlet pipe extending in the direction far away from the second opening end is arranged on the base, and the air inlet pipe is provided with a second air flow channel communicated with the first air flow channel;

the base is arranged at one end of the air inlet pipe and is provided with a magnetic part with attraction force with the heater; when the suction nozzle component is connected with the heater, at least part of the air inlet pipe is tightly inserted in the heater, and the magnetic part is attracted with the heater by magnetic force.

2. The suction nozzle assembly as set forth in claim 1 wherein said magnetic member and said air inlet tube are located on opposite sides of a central axis of said base, said central axis of said magnetic member being spaced from said central axis of said base no greater than a distance from said central axis of said air inlet tube to said central axis of said base.

3. The suction nozzle assembly as set forth in claim 1 wherein the surface of the air inlet conduit for engaging the heater is circumferentially convex.

4. The suction nozzle assembly as set forth in claim 1, further comprising a bracket, wherein the bracket is disposed between the base and the housing, an oil storage chamber is defined between the base and the bracket, an oil hole communicating with the oil storage chamber is formed in the base, and the magnetic member is engaged with the oil hole.

5. A heater for use in a nozzle assembly configured to be removably connected to form an aerosol-generating device, comprising:

a body having an opening to connect with a nozzle assembly;

the heating pipe is positioned in the main body and communicated with the opening of the main body;

and the suction piece is positioned in the main body, is arranged on two sides of the central axis of the main body in parallel with the heating pipe and is magnetically connected with the suction nozzle component.

6. The heater of claim 5, wherein a distance from a central axis of the engaging member to a central axis of the main body is no greater than a distance from a central axis of the heating tube to a central axis of the main body.

7. The heater of claim 5, further comprising a connecting member, wherein the connecting member is located in the main body and above the heating pipe, the connecting member includes a bottom plate, a avoiding hole communicated with the opening of the main body is formed in a position, corresponding to the heating pipe, on the bottom plate, and the suction member is disposed on the bottom plate.

8. The heater of claim 7, wherein the bottom plate has a fixing portion on a lower surface thereof, a center line of the fixing portion coincides with a center line of the avoiding hole, and the fixing portion communicates with the avoiding hole.

9. The heater of claim 8, further comprising a sealing member, one end of the sealing member surrounding the fixing portion and the other end of the sealing member surrounding the heating tube.

10. An aerosol-generating device, comprising: a nozzle assembly as defined in any one of claims 1 to 4 and a heater as defined in any one of claims 5 to 9; the suction nozzle assembly comprises a base, an air inlet pipe and a magnetic part are arranged on the base at a set interval, the heater comprises a main body, and a heating pipe and a suction part are arranged in the main body; when the suction nozzle assembly and the heater are in an assembled state, the air inlet pipe is at least partially inserted into the heating pipe, and the magnetic part is connected with the attraction part in a magnetic attraction mode.