Anti-backflow assembly and heat-not-burn appliance

Abstract

The application relates to the technical field of heating non-combustion, and proposes an anti-backflow assembly and a heating non-combustion appliance. The anti-backflow assembly comprises a base and a one-way valve. The base comprises a cylinder body and an end plate. The first end of the cylinder body is provided with a mounting structure for mounting a heating assembly. The end plate covers the second end of the cylinder body. The end plate is provided with a first air hole and a second air hole. The first air hole is located on the radial inner side of the cylinder body, and the second air hole is located on the radial outer side of the cylinder body. The one-way valve is connected to the second air hole to prevent aerosol from flowing from the side of the end plate away from the cylinder body to the side of the end plate facing the cylinder body. In the anti-backflow assembly, the second air hole is connected with the one-way valve, so that the aerosol cannot flow from the side of the end plate away from the cylinder body to the side of the end plate facing the cylinder body, thereby solving the problem that the aerosol backflow corrodes the solder pad outside the heating tube.

Description

Technical Field

[0001] This application relates to the field of heat-not-burning technology, and in particular to an anti-backflow component and a heat-not-burning appliance. Background Technology

[0002] In related technologies, during the suction interval of heated non-combustible appliances, aerosols (such as flue gas) will flow back. The backflowing aerosols can easily corrode the solder pads on the outside of the heating element. Prolonged suction can cause the solder pads to fall off the heating element, making the heated non-combustible appliances unable to function properly. Utility Model Content

[0003] In view of this, embodiments of this application provide an anti-backflow component and a heating non-combustible appliance to solve the problem of aerosol backflow corroding the solder pads on the outside of the heating tube.

[0004] The first aspect of this application discloses an anti-backflow assembly, including a base and a one-way valve. The base includes a cylindrical body and an end plate. A first end of the cylindrical body is provided with a mounting structure for mounting a heating element. The end plate covers a second end of the cylindrical body. The end plate has a first vent and a second vent, the first vent being located radially inner to the cylindrical body and the second vent being located radially outer to the cylindrical body. The one-way valve is connected to the second vent to prevent aerosol from flowing from the side of the end plate away from the cylindrical body to the side of the end plate facing the cylindrical body.

[0005] The beneficial effects of the anti-backflow component provided in this application embodiment are as follows: During suction, the gas outside the cylinder first flows through the second vent from the side of the end plate facing the cylinder to the side of the end plate facing away from the cylinder. Then, the gas flows through the first vent from the side of the end plate facing away from the cylinder to the side of the end plate facing the cylinder. That is, the gas enters the cylinder and forms smoke, i.e., aerosol, together with the tobacco in the heated cigarette. During the suction interval, some aerosol flows through the first vent from the side of the end plate facing the cylinder to the side of the end plate facing away from the cylinder. Because the second vent is connected to a one-way valve, the aerosol cannot flow from the side of the end plate facing away from the cylinder to the side of the end plate facing the cylinder. This solves the problem of aerosol backflow corroding the solder pads on the outside of the heating element, prevents the solder pads from falling off the heating element due to corrosion, and improves the service life of the heated non-combustible appliance.

[0006] In some embodiments, the one-way valve is a Tesla valve.

[0007] In some embodiments, the Tesla valve is a tubular structure.

[0008] In some embodiments, the Tesla valve is located on the side of the end plate facing the cylinder.

[0009] In some embodiments, a plurality of second air holes are provided at circumferential intervals along the end plate, and each second air hole is connected to the one-way valve.

[0010] In some embodiments, the first air holes are provided at multiple intervals along the circumference of the end plate.

[0011] In some embodiments, the anti-backflow assembly further includes a rib, which is disposed on the side of the end plate facing away from the cylinder and extends circumferentially along the end plate. The rib has a notch at the position corresponding to the second air hole, and the notch connects the first air hole and the second air hole.

[0012] In some embodiments, the outer side of the rib in the radial direction of the end plate is provided with a positioning protrusion for positioning and engaging with a positioning recess on the microphone seat.

[0013] In some embodiments, the positioning protrusions are provided at multiple intervals along the circumference of the end plate.

[0014] In some embodiments, the mounting structure is a stepped structure.

[0015] In some embodiments, the inner wall surface of the cylinder is provided with a plurality of positioning ribs, the plurality of positioning ribs are spaced apart along the circumference of the cylinder and extend along the axial direction of the cylinder, and the end of the positioning rib near the mounting structure is provided with a guide slope.

[0016] The second aspect of this application provides a heat-not-burning appliance comprising a housing, a heating element, and an anti-backflow component as described in the first aspect, wherein the heating element and the anti-backflow component are located within the housing, and the heating element is mounted on the anti-backflow component.

[0017] The heating non-combustible appliance employs any one or more embodiments of the aforementioned anti-backflow component, and thus possesses the beneficial effects of the aforementioned embodiments, which will not be elaborated upon here.

[0018] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 These are schematic diagrams of the structure of the heating non-combustible appliance provided in some embodiments of this application;

[0021] Figure 2 yes Figure 1 A schematic diagram of the structure of the heated non-combustible appliance shown in direction AA;

[0022] Figure 3 yes Figure 2 An enlarged view of the heat-not-burning appliance shown at point B;

[0023] Figure 4 yes Figure 2 Schematic diagram of the anti-reflow component;

[0024] Figure 5 yes Figure 4 A schematic diagram of the anti-backflow component from another perspective;

[0025] Figure 6 yes Figure 3 Schematic diagram of the anti-backflow component and the heating component;

[0026] Figure 7 yes Figure 2 A schematic diagram of the structure of the heated non-combustible appliance in the CC direction is shown.

[0027] Figure 8 yes Figure 7 The diagram shows the structure of the heat-not-burn appliance at point D.

[0028] Figure 9 yes Figure 8 Schematic diagram of the anti-backflow assembly and microphone assembly;

[0029] Figure 10 This is a schematic diagram of the gas flow direction during suction in existing technology.

[0030] The markings in the diagram mean:

[0031] 100. Heating appliances that do not burn;

[0032] 10. Anti-backflow component;

[0033] 11. Base; 111. Cylinder body; 112. End plate; 1121. Outer ring section; 1122. Middle section;

[0034] 12. Check valve; 121. Main flow path; 122. Branch flow path;

[0035] 13. Installation structure;

[0036] 14. First pore;

[0037] 15. Second pore;

[0038] 16. Protruding rib; 161. Notch;

[0039] 17. Position the convex part;

[0040] 18. Positioning ribs; 181. Guide slope;

[0041] 19. Cable trays;

[0042] 20. Heating element; 21. Heating tube; 22. Heating element; 23. Solder pad; 24. Wire;

[0043] 30. Shell;

[0044] 40. Microphone assembly; 41. Microphone; 42. Microphone base; 421. Microphone deformable part; 422. Positioning recess;

[0045] 50. Power supply components;

[0046] 200. Cigarettes. Detailed Implementation

[0047] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0049] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0050] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0051] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0052] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0053] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0054] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0055] In related technologies, when a heated non-combustible device is used for suction, such as... Figure 10 As shown by the middle arrow, the gas outside the cylinder 111 first flows through the second vent 15 from the side of the end plate 112 facing the cylinder 111 to the side of the end plate 112 facing away from the cylinder 111. Then, the gas flows through the first vent 14 from the side of the end plate 112 facing away from the cylinder 111 to the side of the end plate 112 facing the cylinder 111. The gas enters the cylinder 111 and forms smoke, i.e., aerosol, together with the tobacco in the heated cigarette 200. During the suction interval, some aerosol will flow through the first vent 14 from the side of the end plate 112 facing the cylinder 111 to the side of the end plate 112 facing away from the cylinder 111, and can also flow through the second vent 15 from the side of the end plate 112 facing away from the cylinder 111 to the side of the end plate 112 facing the cylinder 111. The backflowing aerosol will corrode the solder pads on the outside of the heating tube 21. Prolonged suction will cause the solder pads to fall off the heating tube 21, resulting in the heating non-combustible appliance being unable to be used normally.

[0056] To address the problem of aerosol backflow corroding the solder pads on the outside of the heating element, this application proposes an anti-backflow component and a heating non-combustible appliance.

[0057] An embodiment of the first aspect of this application provides an anti-backflow component. Please refer to... Figure 3 , Figure 4 and Figure 6 The anti-backflow assembly 10 includes a base 11 and a one-way valve 12. The base 11 includes a cylinder 111 and an end plate 112. The first end of the cylinder 111 is provided with a mounting structure 13 for mounting the heating element 20. The end plate 112 covers the second end of the cylinder 111. The end plate 112 has a first vent 14 and a second vent 15. The first vent 14 is located on the radial inner side of the cylinder 111, and the second vent 15 is located on the radial outer side of the cylinder 111. The one-way valve 12 is connected to the second vent 15 to prevent aerosol from flowing from the side of the end plate 112 away from the cylinder 111 to the side of the end plate 112 facing the cylinder 111.

[0058] The first end and the second end of the cylinder 111 are the two ends of the cylinder 111 along its axial direction, respectively. This can be understood as the first end of the cylinder 111 being... Figure 3 The upper end of the cylinder 111, the second end of the cylinder 111 is Figure 3 The lower end of the cylinder 111; wherein, both the first end and the second end of the cylinder 111 are provided with openings. For example, the cylinder 111 is circular in shape.

[0059] The first end of the cylinder 111 is used to install the heating element 20, and the opening at the first end of the cylinder 111 is used to insert the cigarette stick 200. The end plate 112 covers the opening at the second end of the cylinder 111, and the cigarette stick 200 is inserted into the cylinder 111 from the first end of the cylinder 111 and abuts against the end plate 112.

[0060] It is understood that the end plate 112 can be integrally formed with the cylinder 111; or, the end plate 112 can also be fixedly connected to the cylinder 111 by welding, bonding, fastener connection, pressing, snap-fit, interference fit, etc.

[0061] The end plate 112 has a first vent 14 and a second vent 15. The first vent 14 is located radially inside the cylinder 111, and the second vent 15 is located radially outside the cylinder 111. This can be understood as the first vent 14 and the second vent 15 being located on opposite sides of the cylinder 111 in the radial direction. The shapes of the first vent 14 and the second vent 15 can be circular, elliptical, polygonal, or other shapes.

[0062] The diameter of the second pore 15 is larger than that of the first pore 14.

[0063] For example, the end plate 112 includes a middle portion 1122 and an outer ring portion 1121. A first air hole 14 is provided on the middle portion 1122, and a second air hole 15 is provided on the outer ring portion 1121. The cigarette stick 200 is inserted into the tube 111 from the first end of the tube and abuts against the middle portion 1122. The middle portion 1122 is the area enclosed by the outer ring portion 1121.

[0064] For example, the middle part 1122 can be circular, the outer ring part 1121 is an annulus, the outer diameter of the outer ring part 1121 is larger than the outer diameter of the cylinder 111, and the inner diameter of the outer ring part 1121 can be greater than, equal to or less than the inner diameter of the cylinder 111.

[0065] It is understandable that the outer ring portion 1121 and the middle portion 1122 can be arranged at the same level; or, the outer ring portion 1121 can be lower than the middle portion 1122; or, the outer ring portion 1121 can be higher than the middle portion 1122.

[0066] The one-way valve 12 is connected to the second vent 15. It can be understood that the one-way valve 12 can be located inside or outside the second vent 15. It should be noted that the one-way valve 12 can prevent aerosol from flowing from the side of the end plate 112 away from the cylinder 111 to the side of the end plate 112 facing the cylinder 111, but it can ensure that gas flows smoothly from the side of the end plate 112 facing the cylinder 111 to the side of the end plate 112 away from the cylinder 111.

[0067] Among them, the side of end plate 112 facing away from cylinder 111 is Figure 3 The lower side of the middle end plate 112, the side of the end plate 112 facing the cylinder 111 is Figure 3 The upper side of the middle plate 112.

[0068] For example, please refer to Figure 2 , Figure 5 and Figure 6 The heating element 20 includes a heating tube 21, a heating element 22, a solder pad 23, and a wire 24. The heating tube 21 is installed at the first end of the cylinder 111, the heating element 22 is attached to the outside of the heating tube 21, and the wire 24 is connected to the heating element 22 through the solder pad 23. The heating tube 21 can be a ceramic tube.

[0069] For example, the outer ring portion 1121 of the end plate 112 is provided with a wiring groove 19, through which the wire 24 passes and connects to the power supply component 50. It is understood that multiple wiring grooves 19 can be provided; for example, three wiring grooves 19 can be provided, corresponding to three wires 24, each wire 24 passing through one wiring groove 19. Alternatively, one wiring groove 19 can be provided, in which case the size of the wiring groove 19 should be designed to be larger to accommodate multiple wires 24 passing through one wiring groove 19. The shape of the wiring groove 19 is not limited in this embodiment; for example, the shape of the wiring groove 19 can be U-shaped, rectangular, trapezoidal, etc.

[0070] It should be noted that after the cable tray 19 is used for routing the cable, it needs to be sealed with sealant to ensure a tight seal during suction.

[0071] The beneficial effects of the anti-backflow component 10 provided in this application embodiment are: during suction, such as Figure 3 As shown by the middle arrow, the gas outside the cylinder 111 first flows through the second vent 15 from the side of the end plate 112 facing the cylinder 111 to the side of the end plate 112 facing away from the cylinder 111. Then, the gas flows through the first vent 14 from the side of the end plate 112 facing away from the cylinder 111 to the side of the end plate 112 facing the cylinder 111. That is, the gas enters the cylinder 111 and forms smoke, i.e., aerosol, together with the tobacco in the heated cigarette 200. During the suction interval, some aerosol flows through the first vent 14 from the side of the end plate 112 facing the cylinder 111 to the side of the end plate 112 facing away from the cylinder 111. Since the second vent 15 is connected to the one-way valve 12, the aerosol cannot flow from the side of the end plate 112 facing away from the cylinder 111 to the side of the end plate 112 facing the cylinder 111. This solves the problem of aerosol backflow corroding the solder pad 23 on the outside of the heating tube 21, and prevents the solder pad 23 from falling off the heating tube 21 due to corrosion, thereby improving the service life of the heating non-combustible appliance 100.

[0072] Please refer to Figure 3 and Figure 4 In some embodiments, the one-way valve 12 is a Tesla valve.

[0073] In the Tesla valve, when the flow is forward (from top to bottom), the fluid mainly flows through the main channel 121, with only a small amount entering the branch channel 122. Resistance is low, and the fluid flow is smooth. When the flow is reversed (from bottom to top), some fluid flows through the main channel 121, and some flows through the branch channel 122. The fluid exiting the branch channel 122 creates significant resistance to the fluid in the main channel 121. This process achieves unidirectional control of the Tesla valve.

[0074] For example, the diameter of the main channel 121 is equal to or approximately equal to the diameter of the second vent 15.

[0075] Based on the above technical solution, the Tesla valve achieves unidirectional flow by relying on geometric structure rather than mechanical parts, avoiding the failures caused by wear, aging or jamming of the mechanically structured one-way valve 12; moreover, the Tesla valve passively achieves unidirectional control without the need for sensors or drive devices, thus reducing costs.

[0076] In other embodiments, the one-way valve 12 can be a mechanical valve. For example, the lower end of the second vent 15 can be designed as a tapered opening, and a spring seat, a spring, and a sealing ball can be provided below the second vent 15. The spring is mounted on the mounting base, and the sealing ball is held against the tapered opening by the spring force. During suction, the gas pushes the sealing ball and compresses the spring, causing the second vent 15 to open. During the suction gap, the spring resets, causing the sealing ball to be held against the tapered opening again, thus achieving one-way control.

[0077] Please refer to Figure 3 and Figure 4 In some embodiments, the Tesla valve is a tubular structure.

[0078] Optionally, the Tesla valve includes a vertical pipe and multiple arc-shaped pipes connected to the vertical pipe. One end of the vertical pipe is connected to the orifice of the second vent 15, and the multiple arc-shaped pipes are staggered in the axial direction of the vertical pipe. For example, two arc-shaped pipes are provided on each of the radial sides of the vertical pipe. The cavity of the vertical pipe forms a main flow channel 121, and the cavity of the arc-shaped pipes forms a branch flow channel 122.

[0079] It is understandable that one end of the vertical pipe can be fixedly connected to the opening of the second air hole 15 by means of welding, bonding, snap-fitting, pressing, interference fit, etc.

[0080] It is understandable that the curved tube can be integrally formed with the vertical tube; or, the curved tube can be fixedly connected to the vertical tube by means of welding, bonding, snap-fitting, pressing, interference fit, etc.

[0081] Based on the above technical solutions, the tubular structure is relatively simple, easy to process, and occupies less space.

[0082] In other embodiments, the second vent 15 can be used as the main flow channel 121, and a branch flow channel 122 can be machined around the second vent 15 to form a Tesla valve structure.

[0083] Please refer to Figure 3 and Figure 4 In some embodiments, the Tesla valve is located on the side of the end plate 112 facing the cylinder 111, that is, the Tesla valve is located on the upper side of the end plate 112. The Tesla valve is arranged vertically.

[0084] For example, the Tesla valve is located on the side of the outer ring portion 1121 facing the cylinder 111. Since the space outside the cylinder 111 is relatively large, placing the Tesla valve on the side of the outer ring portion 1121 facing the cylinder 111 is advantageous for the Tesla valve's configuration.

[0085] In other embodiments, the Tesla valve may also be located on the side of the end plate 112 facing away from the cylinder 111, that is, the Tesla valve is located on the lower side of the end plate 112. To facilitate the installation of the Tesla valve, it can be arranged horizontally.

[0086] Please refer to Figure 3 and Figure 4 In some embodiments, multiple second air holes 15 are provided at circumferential intervals along the end plate 112, and each second air hole 15 is connected to a one-way valve 12.

[0087] It is understood that two, three, or four or more second air holes 15 can be spaced apart along the circumference of the end plate 112, and correspondingly, two, three, or four or more one-way valves 12 can be spaced apart along the circumference of the end plate 112; wherein, each second air hole 15 is connected to a one-way valve 12.

[0088] Optionally, a plurality of second vents 15 are evenly spaced along the circumference of the end plate 112 to ensure the uniformity of the gas entering the cylinder 111 during suction. For example, two second vents 15 are evenly spaced along the circumference of the end plate 112, and the two second vents 15 are symmetrically distributed on both sides of the cylinder 111.

[0089] Based on the above technical solution, by setting multiple second air holes 15 and multiple one-way valves 12, it is beneficial to better air intake during suction, and at the same time, it can ensure that the aerosol will not flow back to the outside of the cylinder 111 during the suction interval, thus avoiding corrosion of the welding pad 23.

[0090] In other embodiments, a second vent 15 is provided, and correspondingly, a one-way valve 12 is provided.

[0091] In some embodiments, a plurality of first vents 14 are provided at circumferential intervals along the end plate 112.

[0092] Optionally, a plurality of first air holes 14 are evenly spaced along the circumference of the end plate 112 to ensure the uniformity of the gas entering the cylinder 111 during suction.

[0093] It is understandable that the first vent 14 can be provided in one, two, or more than three layers along the radial direction of the end plate 112.

[0094] In other embodiments, the first vents 14 may be arranged randomly on the end plate 112.

[0095] Please refer to Figure 3 and Figure 5 In some embodiments, the anti-backflow assembly 10 further includes a rib 16, which is provided on the side of the end plate 112 facing away from the cylinder 111 and extends circumferentially along the end plate 112. The rib 16 has a notch 161 at the position corresponding to the second air hole 15, and the notch 161 connects the first air hole 14 and the second air hole 15.

[0096] The raised rib 16 is located on the side of the outer ring portion 1121 facing away from the cylinder 111. It can be understood that the raised rib 16 can be integrally formed with the outer ring portion 1121; or, the raised rib 16 can be fixedly connected to the outer ring portion 1121 by means of welding, bonding, snap-fitting, pressing, interference fit, etc.

[0097] For example, the rib 16 is an annular rib, and there are two second air holes 15. The annular rib has two notches 161. The two second air holes 15 are symmetrically arranged on the outer ring portion 1121, and the two notches 161 are symmetrically arranged on the rib 16. That is, the two second air holes 15 and the two notches 161 are arranged in a "I" shape, and the two notches 161 are located between the two second air holes 15.

[0098] The notch 161 connects the first vent 14 and the second vent 15, that is, the gas in the second vent 15 enters the first vent 14 through the notch 161, and then enters the cylinder 111.

[0099] Based on the above technical solution, the gas flowing out from the second vent 15 passes through the gap 161, which helps to generate a pressure drop and produce a certain negative pressure, thereby realizing the deformation of the microphone deformation part 421 and ensuring accurate counting.

[0100] Please refer to Figure 5 , Figure 8 and Figure 9 In some embodiments, on the radial side of the end plate 112, the outer side of the rib 16 is provided with a positioning protrusion 17 for positioning and engaging with the positioning recess 422 on the microphone seat 42.

[0101] It is understood that one positioning protrusion 17 can be provided, and correspondingly, one positioning recess 422 can be provided; or, multiple positioning protrusions 17 can be provided, and correspondingly, multiple positioning recesses 422 can be provided. For example, two positioning protrusions 17 are provided, and correspondingly, two positioning recesses 422 are provided.

[0102] When multiple positioning protrusions 17 are provided, the dimensions of the multiple positioning protrusions 17 can be the same or different.

[0103] Based on the above solution, the positioning protrusion 17 and the positioning recess 422 are positioned and engaged to ensure the stability of the base 11 installed on the microphone base 42.

[0104] In other embodiments, the positioning protrusion 17 may not be provided on the rib 16, but rather on the outer peripheral surface of the end plate 112.

[0105] Please refer to Figure 3 and Figure 4 In some embodiments, the mounting structure 13 is a stepped structure.

[0106] For example, the stepped structure is located inside the cylinder 111, and the end of the heating tube 21 of the heating component 20 is inserted into the cylinder 111 and abuts against the stepped structure. In this way, the heating component 20 has good stability after being installed on the cylinder 111.

[0107] Of course, in some embodiments, the mounting structure 13 can also be a groove structure, with the groove structure located on the end face of the cylinder 111, and the end of the heating tube 21 of the heating component 20 inserted into the groove structure.

[0108] Please refer to Figure 4 In some embodiments, the inner wall surface of the cylinder 111 is provided with a plurality of positioning ribs 18. The plurality of positioning ribs 18 are arranged at intervals along the circumference of the cylinder 111 and extend along the axial direction of the cylinder 111. The end of the positioning rib 18 near the mounting structure 13 is provided with a guide slope 181.

[0109] It is understandable that the guiding slope 181 can be a straight slope or an arc-shaped slope.

[0110] It is understood that the positioning rib 18 can be integrally formed with the cylinder 111; or, the positioning rib 18 can be fixed to the inner wall surface of the cylinder 111 by means of welding, bonding, snap-fitting, pressing, etc.

[0111] For example, a plurality of positioning ribs 18 are evenly spaced along the circumference of the cylinder 111.

[0112] Based on the above technical solution, the guide slope 181 facilitates the insertion of the cigarette stick 200 into the tube 111.

[0113] Please refer to Figure 1 and Figure 2 The second aspect of this application provides a heat-not-burning appliance 100, which includes a housing 30, a heating element 20 and an anti-backflow component 10 as described in the first aspect, wherein the heating element 20 and the anti-backflow component 10 are located within the housing 30 and the heating element 20 is mounted on the anti-backflow component 10.

[0114] After the heating element 20 heats up, it conducts heat to the cigarette 200 to achieve low-temperature baking of the cigarette 200, thereby generating aerosol.

[0115] Please refer to Figure 3 and Figure 6The anti-backflow component 10 can prevent aerosol backflow from corroding the pads 23 on the outside of the heating tube 21, thus preventing the pads 23 from falling off the heating tube 21 due to corrosion and improving the service life of the heating non-combustible appliance 100.

[0116] Optionally, please also refer to Figure 7 and Figure 8 The microphone assembly 40 includes a microphone 41 and a microphone base 42. The microphone 41 is mounted on the microphone base 42. The microphone base 42 includes a microphone deformation part 421. The microphone 41 is located on one side of the microphone deformation part 421 in the horizontal direction, or the microphone 41 is located below the microphone deformation part 421. The microphone 41 is used to detect the deformation of the microphone deformation part 421 and trigger the operation of the heated non-combustible appliance 100.

[0117] Optionally, the heated non-combustible appliance 100 further includes a power supply assembly 50 located within the housing 30, the power supply assembly 50 supplying power to the heating assembly 20 and the microphone assembly 40; wherein the anti-backflow assembly 10, the heating assembly 20, and the microphone assembly 40 are positioned above the power supply assembly 50. Exemplarily, the power supply assembly 50 includes a battery cell.

[0118] The heated non-combustible appliance 100 adopts any one or more embodiments of the aforementioned anti-backflow component 10, and thus has the beneficial effects of the aforementioned embodiments, which will not be described in detail here.

[0119] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A backflow prevention component, characterized in that: The device includes a base and a one-way valve. The base includes a cylindrical body and an end plate. The first end of the cylindrical body is provided with a mounting structure for mounting a heating element. The end plate covers the second end of the cylindrical body. The end plate has a first vent and a second vent. The first vent is located radially inside the cylindrical body, and the second vent is located radially outside the cylindrical body. The one-way valve is connected to the second vent to prevent aerosol from flowing from the side of the end plate away from the cylindrical body to the side of the end plate facing the cylindrical body.

2. The anti-backflow component as described in claim 1, characterized in that: The one-way valve is a Tesla valve.

3. The anti-backflow component as described in claim 2, characterized in that: The Tesla valve has a tubular structure.

4. The anti-backflow component as described in claim 3, characterized in that: The Tesla valve is located on the side of the end plate facing the cylinder.

5. The anti-backflow assembly as described in claim 1, characterized in that: The second air hole is provided at multiple intervals along the circumference of the end plate, and each second air hole is connected to the one-way valve.

6. The anti-backflow component as described in claim 1, characterized in that: The first air hole is provided in multiple circumferentially along the end plate.

7. The anti-backflow assembly as described in any one of claims 1-6, characterized in that: The anti-backflow assembly also includes a rib, which is located on the side of the end plate facing away from the cylinder and extends circumferentially along the end plate. The rib has a notch at the position corresponding to the second air hole, and the notch connects the first air hole and the second air hole.

8. The anti-backflow assembly as described in claim 7, characterized in that: In the radial direction of the end plate, the outer side of the rib is provided with a positioning protrusion for positioning and engaging with the positioning recess on the microphone seat.

9. The anti-backflow assembly as described in claim 8, characterized in that: The positioning protrusions are provided at multiple intervals along the circumference of the end plate.

10. The anti-backflow assembly as described in any one of claims 1-6, characterized in that: The installation structure is a stepped structure.

11. The anti-backflow assembly as described in any one of claims 1-6, characterized in that: The inner wall of the cylinder is provided with a plurality of positioning ribs, which are spaced apart along the circumference of the cylinder and extend along the axial direction of the cylinder. The end of the positioning rib near the mounting structure is provided with a guide slope.

12. A heating non-combustible appliance, characterized in that: It includes a housing, a heating element, and an anti-backflow component as described in any one of claims 1-11, wherein the heating element and the anti-backflow component are located within the housing, and the heating element is mounted on the anti-backflow component.

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