CN220000851U

CN220000851U - Atomizer and electronic atomizing device

Info

Publication number: CN220000851U
Application number: CN202320995334.1U
Authority: CN
Inventors: 彭争战; 乐雷
Original assignee: Shenzhen Innokin Technology Co Ltd
Current assignee: Shenzhen Innokin Technology Co Ltd
Priority date: 2023-04-27
Filing date: 2023-04-27
Publication date: 2023-11-14
Anticipated expiration: 2033-04-27

Abstract

The utility model relates to the technical field of electronic atomization, and provides an atomizer and an electronic atomization device, wherein the atomizer comprises a shell, an atomization core and an air return assembly, an inner pipe part is arranged in the shell, a liquid storage cavity is formed between the inner pipe part and the shell, and an air outlet channel is formed in the inner pipe part; the atomizing core includes liquid guide and atomizing core shell, wear to be equipped with return vent and inlet port on the atomizing core shell, the inlet port is close to the passageway of giving vent to anger more than the inlet port, in the atomizing core shell was located to the liquid guide, still be equipped with connecting portion on the atomizing core shell, the return air subassembly includes the sleeve pipe, air duct and capillary structure, sleeve pipe one end is connected with inner tube portion, the sleeve pipe other end is connected with connecting portion, the sleeve pipe forms the interval space with the periphery wall of return vent department on the atomizing core shell, the air duct is installed on the sleeve pipe, capillary structure forms in the return air subassembly, and communicate return vent and stock solution chamber, reduce or eliminate the resistance of returning air through setting up the return air subassembly, reduce the risk that the liquid guide takes place lack of liquid dry combustion method and promote user's suction taste.

Description

Atomizer and electronic atomizing device

Technical Field

The utility model relates to the technical field of electronic atomization, in particular to an atomizer and an electronic atomization device.

Background

Electronic nebulizers generally include a nebulizer, which generally includes an air inlet channel, an air outlet channel, a liquid storage chamber for storing a nebulized liquid, and a nebulizing core in communication with the liquid storage chamber, and the nebulizing core generally includes a liquid guide and a heating element that are connected to each other. When the electronic atomization device works, atomized liquid in the liquid storage cavity is guided to the position of the heating body by the liquid guide body, aerosol is generated after the heating body heats the atomized liquid, and the aerosol flows out through the air outlet channel to be sucked by a user. The heating element can be in the form of metal heating wire, metal heating sheet, conductive ceramic heating element, and the liquid-guiding material can be cotton, porous ceramic, etc.

In the related art, after the atomized liquid in the liquid storage cavity is reduced due to guiding liquid, the internal pressure of the liquid storage cavity is reduced to form a certain negative pressure relative to the space in the air outlet channel communicated with the outside, and the negative pressure can increase the resistance of the atomized liquid in the subsequent guiding liquid guiding process, so that the user can smoothly guide the liquid guiding process for the subsequent atomized liquid, ensure that the user can suck the atomized liquid normally, and return air to the liquid storage cavity, namely, the outside air enters the liquid storage cavity through the micro-pores of the liquid guiding process, so that the air pressure in the liquid storage cavity is improved, and the negative pressure relative to the outside environment in the liquid storage cavity is reduced. The external environment herein refers to the space in the gas channel and the outside communicating with the gas channel.

However, in the air return process of the atomizer, air guided to the liquid storage cavity needs to permeate into the liquid storage cavity through liquid guiding, namely, a liquid guiding path of atomized liquid in the liquid storage cavity for guiding the liquid guiding and an air return path of external air in the liquid storage cavity through the liquid guiding are identical, and the flowing directions of the liquid guiding path and the air return path are opposite, so that the atomized liquid in the liquid storage cavity is prevented from guiding the liquid guiding by pressure generated by air to be fed into the liquid storage cavity to a liquid inlet of the liquid storage cavity wall, gravity of the atomized liquid in the liquid guiding and the pressure generated by the atomized liquid in the liquid guiding to the liquid inlet also prevent the air from entering the liquid storage cavity, the air cannot smoothly enter the liquid storage cavity, the atomized liquid at the liquid guiding position is difficult to be timely supplemented after being consumed, and a dry burning phenomenon is generated, the sucking taste of a user is reduced, and a heating element burns out the liquid guiding body when the dry burning phenomenon is serious.

Disclosure of Invention

The utility model aims to provide an atomizer and an electronic atomization device, which can reduce or eliminate resistance of air return by arranging an air return component, reduce the risk of liquid-lack dry combustion of liquid guide and improve the suction taste of a user.

To achieve the above object, the present utility model provides an atomizer comprising:

the shell is internally provided with an inner pipe part, a liquid storage cavity is formed by enclosing between the outer wall of the inner pipe part and the inner wall of the shell, an air outlet channel is formed by enclosing the inner wall of the inner pipe part, and an air outlet communicated with the air outlet channel is formed in the shell;

the atomization core is arranged in the shell and is connected with one end, far away from the air outlet, of the inner pipe part, the atomization core comprises a liquid guide and a hollow atomization core shell, at least one air return hole and at least one liquid inlet hole are formed in the atomization core shell in a penetrating mode, the air return hole is closer to the air outlet channel than the liquid inlet hole, the liquid guide is arranged in a hollow space of the atomization core shell and is in contact connection with the air return hole and the inner side wall of the atomization core shell at the liquid inlet hole, the air return hole and the liquid inlet hole are respectively communicated with the liquid guide and the liquid storage cavity, and a connecting part is arranged on the outer wall, between the air return hole and the liquid inlet hole, of the atomization core shell; and

an air return assembly, the air return assembly comprising:

one end of the sleeve is connected to the peripheral wall of the inner pipe part, the other end of the sleeve extends towards the direction far away from the air outlet and is in sealing connection with the connecting part, and the inner wall of the sleeve and the peripheral wall of the atomizing core shell, which comprises the air return hole, are oppositely arranged at intervals to form an interval space;

The air duct is at least one, one end of the air duct is arranged on the sleeve and is communicated with the interval space, and the other end of the air duct extends to one end of the liquid storage cavity close to the air outlet; and

the capillary structure is at least one and is formed in the air return assembly and communicated with the air return hole and the liquid storage cavity.

Further, the capillary structure is formed in the whole inner tube space of the air duct; or,

the capillary structure is formed in part of the space in the air duct.

Further, the interval of the capillary structure is a first interval, when the capillary structure is formed in a part of the space in the air duct, at least one air duct with a second interval is formed in the air duct, the first interval is smaller than the second interval, and the first interval is smaller than the minimum interval of the interval space along the radial direction of the atomizing core shell.

Further, when the capillary structure is formed in the end, far away from the sleeve, of the air duct, the air duct is formed in the end, close to the sleeve, of the air duct, the air return hole, the interval space, the air duct, the capillary structure and the liquid storage cavity are sequentially communicated and form an air return path.

Further, the capillary structure is a capillary gap, the width of the capillary gap along the radial direction of the air duct is the first interval, the first interval is 0.1mm-1mm, and the length of the capillary gap along the axial direction of the air duct is more than or equal to 3mm.

Further, the capillary structure is a capillary channel, and the air return assembly further comprises:

the separation piece is arranged on the periphery of the inner pipe in a sealing manner, the peripheral wall of the separation piece is in sealing abutting connection with the inner side wall of the shell, a liquid-free space is formed between the separation piece and the inner wall of one end of the liquid storage cavity, which is close to the air outlet, at least one capillary channel is arranged on the separation piece in a penetrating manner along the axial direction of the separation piece, and the capillary channel is communicated with the liquid-free space and the liquid storage cavity;

one end of the air duct, which is close to the air outlet, is connected with the separating piece, and the air duct is communicated with the liquid-free space.

Further, the capillary structure is a capillary channel, the air return assembly further comprises at least one air return pipe, the air return pipe is connected to one end of the air guide pipe, which is close to the air outlet, the capillary channel is at least partially formed in the air return pipe, and the capillary channel is communicated with the air guide pipe and the liquid storage cavity.

Further, the capillary structure is a capillary channel, the air return assembly further comprises an air return cap which is sleeved on the periphery of the inner pipe part and is connected with the inner wall of the top of the shell, one end part of the air duct, which is close to the air outlet, is installed in the air return cap, the air return cap is provided with at least one capillary channel, and the capillary channel extends from the outer side wall of the air return cap towards the axis direction of the air return cap and is communicated with the air duct and the liquid storage cavity.

Further, the aperture of the capillary channel is 0.2mm-2mm, the aperture of the capillary channel is smaller than the radial interval of the air duct along the air duct, and the aperture of the capillary channel is smaller than the radial minimum interval of the interval space along the atomizing core shell, wherein:

when the capillary channel is formed on the separator, a length of the capillary channel in an axial direction of the separator is 3mm or more; or,

when the capillary channel is formed on the air return pipe, the length of the capillary channel along the axial direction of the air return pipe is more than or equal to 3mm; or,

when the capillary channel is formed on the air return cap, the length of the capillary channel along the radial direction of the air return cap is more than or equal to 3mm.

To achieve the above object, the present utility model provides an electronic atomizing device including the atomizer described in the above embodiment.

The atomizer and the electronic atomization device provided by the utility model have the beneficial effects that:

the atomizer provided by the embodiment of the utility model comprises a shell, an atomizing core and an air return assembly, wherein an inner pipe part is arranged in the shell, a liquid storage cavity is formed by enclosing between the outer wall of the inner pipe part and the inner wall of the shell, an air outlet channel is formed by enclosing the inner wall of the inner pipe part, and an air outlet communicated with the air outlet channel is arranged on the shell; the atomizing core is located in the shell and is connected with the one end that the gas outlet was kept away from to interior pipe portion, the atomizing core includes liquid guide and hollow atomizing core shell, wear to be equipped with at least one return air hole and at least one feed liquor hole on the atomizing core shell, the feed liquor hole compares the feed liquor hole and is close to the passageway of giving vent to anger, the liquid guide is built-in the cavity space of atomizing core shell, and with return air hole department and the inside wall contact connection of the atomizing core shell of feed liquor hole department, the return air hole is equipped with connecting portion on the outer wall that the atomizing core shell is located between return air hole and the feed liquor hole with feed liquor hole respectively intercommunication liquid and stock solution chamber. The air return assembly comprises a sleeve, at least one air duct and at least one capillary structure, one end of the sleeve is connected to the peripheral wall of the inner pipe, the other end of the sleeve extends towards the direction away from the air outlet and is in sealing connection with the connecting part, the relative interval between the inner peripheral wall of the sleeve and the peripheral wall of the atomizing core shell, which comprises an air return hole, is arranged to form an interval space, one end of the air duct is arranged on the sleeve, the space in the pipe of the air duct is communicated with the interval space, the other end of the air duct extends to one end, close to the air outlet, of the liquid storage cavity, the capillary structure is formed in the air return assembly, and the capillary structure is communicated with the air return hole and the liquid storage cavity. At this time, because the gas return hole is closer to the gas outlet channel than the liquid inlet hole, namely, the gas return hole is closer to the position above the atomizer than the liquid inlet hole in the axial direction of the atomizing core shell, the pressure of liquid in the liquid storage cavity received by the gas return hole is smaller than the hydraulic pressure in the liquid storage cavity received by the liquid inlet hole, namely, the liquid pressure difference exists between the gas return hole and the liquid inlet hole. Therefore, compared with the liquid inlet hole, the outside air is easier to enter the interval space formed between the inner peripheral wall of the sleeve and the outer peripheral wall of the atomization core shell, which is provided with the air return hole, and then enters the liquid storage cavity through the air guide pipe and at least one capillary structure formed in the air return assembly.

Because the connecting portion is arranged on the outer wall of the atomizing core shell between the air return hole and the liquid inlet, and the other end of the sleeve extends towards the direction away from the air outlet and is in sealing connection with the connecting portion, atomized liquid in the liquid storage cavity cannot flow into the interval space from the other end of the sleeve, and therefore, after external air enters the interval space from the air return hole, the external air cannot be blocked by the atomized liquid, and accordingly, the atomized liquid can enter the air guide pipe communicated with the interval space in an unobstructed manner. Moreover, because the capillary structure is formed in the air return assembly, when the atomized liquid in the liquid storage cavity flows into the liquid guide from the liquid inlet hole, the atomized liquid can also want to flow into the air guide pipe and the interval space from the other end of the air guide pipe (namely, the end of the air guide pipe far away from the sleeve) through at least one capillary structure formed in the air return assembly, but the atomized liquid flowing into the capillary structure cannot completely fill the whole capillary structure due to the air resistance of the capillary structure. In this way, the atomized liquid cannot reach the air duct and the interval space in the air return assembly from the other end of the air duct due to the air resistance of the capillary structure, in addition, because the air return hole is positioned closer to the air outlet channel than the liquid inlet hole, that is, the air return hole is positioned at a higher position than the liquid inlet hole in the axial direction of the atomized core shell, the pressure of the liquid in the liquid storage cavity received by the air return hole is smaller than the liquid pressure in the liquid storage cavity received by the liquid inlet hole, and therefore, the external air can smoothly pass through the air return hole, and then pass through the sleeve pipe comprising the interval space, the air duct and at least one capillary structure formed in the air return assembly to enter the liquid storage cavity; in contrast, since the pressure of the liquid received at the liquid inlet is greater than the hydraulic pressure received at the air return hole, only a small portion of the gas or even no gas enters the liquid storage cavity through the liquid inlet, and when the atomized liquid in the liquid storage cavity is introduced into the liquid guide body through the liquid inlet, the gas resistance of the atomized liquid is small or even no gas resistance is received, so that the atomized liquid can more smoothly flow into the liquid guide body through the liquid inlet. From the above, the liquid guiding path for guiding the atomized liquid in the liquid storage cavity through the liquid inlet hole and the air guiding path for guiding the liquid through the air return hole, the interval space, the air guide pipe and at least one capillary structure formed in the air return assembly, wherein the air return path for returning the air to the liquid storage cavity is two mutually independent different paths, the liquid pressure difference exists between the air return hole and the liquid inlet hole, the liquid pressure received at the liquid inlet hole is larger than the liquid pressure received at the air return hole, so that the atomized liquid can break through the resistance of the air to be fed into the liquid storage cavity more easily and is guided into the liquid guiding body, the outside air can continuously enter the liquid storage cavity through the air return hole, the interval space, the air guide pipe and at least one capillary structure formed in the air return component, so that the air pressure in the liquid storage cavity can be continuously in a state of keeping air pressure balance with the external air pressure in the air outlet channel, atomized liquid in the liquid storage cavity can be continuously led in the liquid guide through the liquid inlet hole, the problem that atomized liquid in the liquid guide is difficult to be timely supplemented after being consumed is avoided, the risk of damage caused by long-time liquid shortage and dry combustion of the liquid guide is reduced, the service life of the liquid guide and the taste of suction are prolonged, and the whole service life of the atomizer is prolonged.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of a atomizer according to an embodiment of the present utility model;

FIG. 2 is a top view of the atomizer of FIG. 1;

FIG. 3 is a cross-sectional view of the first embodiment of the atomizer of FIG. 2 taken along the direction A-A;

FIG. 4 is an enlarged view of a portion B of FIG. 3;

FIG. 5 is a schematic perspective view of a atomized core casing according to an embodiment of the present utility model;

FIG. 6 is a cross-sectional view of a atomizer according to a second embodiment of the utility model;

FIG. 7 is an enlarged view of a portion C of FIG. 6;

FIG. 8 is a cross-sectional view of a atomizer according to a third embodiment of the utility model;

FIG. 9 is an enlarged view of a portion D of FIG. 8;

fig. 10 is a cross-sectional view of a atomizer according to a fourth embodiment of the utility model.

Reference numerals illustrate:

100-outer shell, 110-inner pipe part, 120-liquid storage cavity, 130-air outlet channel and 140-air outlet;

200-atomizing cores, 210-liquid guiding, 220-atomizing core shells, 221-air return holes, 222-liquid inlet holes and 223-connecting parts;

300-air return component, 310-sleeve, 320-air guide pipe, 311-interval space, 312-wall surface, 330-capillary structure, 331-capillary gap, 340-air guide channel, 350-partition piece, 352-installation through hole, 353-flange, 360-air return pipe, 370-air return cap, 351, 361, 371-capillary channel;

1000-liquid free space;

401-outer side walls, 402-bottom;

l1-first pitch, L2-second pitch.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "size," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may include one or more features, either explicitly or implicitly. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In addition, if "and/or", "and/or" and/or "are used throughout, the meaning includes three parallel schemes, for example," a and/or B ", including a scheme, or B scheme, or a scheme where a and B meet simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The embodiment of the utility model provides an atomizer which can be particularly used in the fields of medical treatment, electronic cigarettes and the like. In a specific embodiment, the atomizer can be used as an electronic cigarette for atomizing tobacco tar and generating aerosol for use by a smoker, as exemplified in the following embodiments. Of course, in other embodiments, the nebulizer may also be applied to medical devices for treating upper and lower respiratory diseases to nebulize medical drugs, which is not limited in the present utility model.

As shown in connection with fig. 1 to 3, 6, 8 and 10, the atomizer includes a housing 100, an atomizing core 200, and an air return assembly 300.

The inside of the shell 100 is provided with an inner pipe 110, a liquid storage cavity 120 for storing atomized liquid is formed between the outer wall of the inner pipe 110 and the inner wall of the shell 100, an air outlet channel 130 is formed in the inner periphery of the inner pipe 110, and an air outlet 140 communicated with the air outlet channel 130 is arranged on the shell 100.

The atomizing core 200 is provided in the housing 100, and the atomizing core 200 is connected to an end of the inner pipe 110 remote from the air outlet 140. The atomizing core 200 comprises a liquid guiding body 210 and a hollow atomizing core shell 220, wherein at least one air return hole 221 and at least one liquid inlet hole 222 are formed in the atomizing core shell 220 in a penetrating manner, the air return hole 221 is closer to the air outlet channel 130 than the liquid inlet hole 222, the liquid guiding body 210 is arranged in the hollow space of the atomizing core shell 220 and is in contact connection with the air return hole 221 and the inner side wall of the atomizing core shell 220 at the liquid inlet hole 222, the air return hole 221 and the liquid inlet hole 222 are respectively communicated with the liquid guiding body 210 and the liquid storage cavity 120, and a connecting part 223 is arranged on the outer wall of the atomizing core shell between the air return hole and the liquid inlet hole.

The air return assembly 300 includes a sleeve 310 and at least one air duct 320, wherein one end of the sleeve 310 is connected to the outer peripheral wall of the inner tube 110, the other end of the sleeve 310 extends away from the air outlet 140, and the other end of the sleeve 310 is connected to the connecting portion 223 in a sealing manner, and the inner peripheral wall of the sleeve 310 and the outer peripheral wall of the atomizing core 220 including the air return hole 221 are disposed at opposite intervals to form a space 311. One end of the air duct 320 is mounted on the sleeve 310, and the space inside the air duct 320 is communicated with the space 311, and the other end of the air duct 320 extends to one end of the liquid storage chamber 120 near the air outlet 140. Wherein, at least one capillary structure 330 is formed in the air return assembly 300, and the capillary structure 330 communicates the air return hole 221 with the liquid storage cavity 120.

In the embodiment of the present application, the inner tube 110 is disposed in the outer shell 100, and when the embodiment is implemented, the outer shell 100 and the inner tube 110 may be in an integrally formed structure or a split structure. The air outlet 140 is formed on the housing 100, the air outlet 140 is communicated with the air outlet channel 130 formed by the inner periphery of the inner tube 110, and the aerosol generated after the atomized liquid is heated and atomized sequentially passes through the air outlet channel 130 and the air outlet 140 to be led out to the outside for the user to inhale.

The fact that the air return hole 221 is closer to the air outlet channel 130 than the liquid inlet hole 222 means that the air return hole 221 and the liquid inlet hole 222 are arranged at intervals along the axial direction of the atomization core shell 220, the air return hole 221 is arranged above the liquid inlet hole 222, one end of the liquid inlet hole 222 close to the air outlet 140 is arranged above the liquid inlet hole 222, namely, the position of the air return hole 221 and the position of the liquid inlet hole 222 have a height difference in the liquid storage cavity 120, and therefore the pressure of liquid in the liquid storage cavity 120 received by the air return hole 221 is smaller than the pressure in the liquid storage cavity 120 received by the liquid inlet hole 222, namely, a liquid pressure difference exists between the air return hole 221 and the liquid inlet hole 222. Therefore, compared to the liquid inlet 222, the external air more easily enters the space 311 formed between the inner wall of the sleeve 310 and the outer wall of the atomizing core 220 including the air return hole 221 from the air return hole 221, and then enters the liquid storage chamber 120 through the air duct 320 and the at least one capillary structure 330 formed in the air return assembly 300. At the liquid inlet 222, the pressure of the liquid in the liquid storage chamber 120 received at the liquid inlet 222 is greater than the pressure of the liquid received at the air return hole, so that the atomized liquid in the liquid storage chamber 120 can be more easily introduced into the liquid guide 210 through the liquid inlet 222. In the embodiment of the present application, the number of the air return holes 221 may be one or more, the number of the liquid inlet holes 222 may be one, and the number of the air return holes 221 and the number of the liquid inlet holes 222 may be equal or unequal, which is not limited herein.

The liquid guide 210 arranged in the hollow space of the atomization core shell 220 is in contact connection with the inner side wall of the atomization core shell 220 at and around the air return hole 221 on the atomization core shell 220 and the inner side wall of the atomization core shell 220 at and around the liquid inlet 222 on the atomization core shell 220, so that the liquid guide 210 can completely shield the air return hole 221 and the liquid inlet 222, and the air return hole 221 can be communicated with the liquid guide 210 and the liquid storage cavity 120, and the liquid inlet 222 can also be communicated with the liquid guide 210 and the liquid storage cavity 120.

Preferably, in the embodiment of the present application, the liquid guide 210 is closely contacted with the inner sidewall of the atomizing core shell 220 at the air return hole 221 and the liquid inlet hole 222, so that leakage of the atomized liquid can be prevented. More preferably, in the embodiment of the present application, the outer periphery of the liquid guide 210 may be in contact with the inner side wall of the atomizing core shell 220, and since the liquid guide 210 has a certain liquid storage function, when the outer periphery of the liquid guide 210 and the inner side wall of the atomizing core shell 220 are in contact with each other, the effect of preventing the dry combustion of the atomizing core 200 in the state of no or little liquid in the liquid storage cavity 120 can be achieved. Further, when the outer circumference of the entire liquid guide 210 is in close contact with the inner sidewall of the atomizing core housing 220, the leakage of the atomizing core 200 can be prevented.

In the embodiment of the present application, one end of the sleeve 310 is the end of the sleeve 310 close to the air outlet 140, namely, the upper end of the sleeve 310; the other end of the sleeve 310 is the end of the sleeve 310 away from the air outlet 140, i.e., the lower end of the sleeve 310. One end of the sleeve 310 will be referred to as an upper end portion of the sleeve 310, and the other end of the sleeve 310 will be referred to as a lower end portion of the sleeve 310. The upper end portion of the sleeve 310 is sealed to the outer peripheral wall of the inner tube portion 110, and preferably the upper end portion of the sleeve 310 is sealed to the outer peripheral wall of the lower end portion of the inner tube portion 110. The lower end portion of the sleeve 310 extends in a direction away from the air outlet 140, and a space 311 is formed between the inner peripheral wall of the lower end portion of the sleeve 310 and the outer peripheral wall of the atomizing core housing 220 including the air return hole 221. In the present embodiment, the lower end portion of the sleeve 310 is hermetically connected to the connection portion 223, so that the external gas can directly enter the space 311 from the gas return hole 221; further, the sealing connection of the lower end portion of the sleeve 310 to the connection portion 223 can prevent the atomized liquid in the liquid storage chamber 120 from entering the space 311 from the lower end portion of the sleeve 310.

In the embodiment of the present application, referring to fig. 3 and 5, the connection portion 223 may be an annular structure protruding on the atomizing core shell 220 and located at the peripheral wall between the air return hole 221 and the liquid inlet hole 222, and the lower end portion of the sleeve 310 is connected with the connection portion 223 of the annular structure in a sealing manner; alternatively, the connection portion 223 may be a connection groove (not shown) concavely provided on the outer peripheral wall of the atomizing core 220, the inner cylinder wall of the lower end portion of the sleeve 310 may be provided with a flange corresponding to the connection groove of the atomizing core 220, and the flange may be inserted into the connection groove of the atomizing core 220, so as to realize the sealing connection between the sleeve 310 and the connection groove of the atomizing core 220. The advantage of providing the connection portion 223 is that when the lower end portion of the sleeve 310 is in sealing connection with the connection portion 223 at the outer peripheral wall of the atomizing core housing 220, the atomized liquid in the liquid storage chamber 120 does not flow into the space 311 from the lower end portion of the sleeve 310, so that when the external air enters the space 311 from the air return hole 221, the external air is not blocked by the atomized liquid, and thus can enter the air guide tube 320 which is in communication with the space 311 without obstruction. Of course, in other embodiments of the present application, the present application is not limited as long as the sealing connection between the lower end portion of the sleeve 310 and the connection portion 223 can be achieved, so that the atomized liquid cannot enter into the space 311 from below the sleeve 310.

In the embodiment of the present application, one end of the air duct 320 is the end of the air duct 320 close to the sleeve 310, namely the lower end of the air duct 320; the other end of the air duct 320 is the end of the air duct 320 far away from the sleeve 310, namely the upper end of the air duct 320. The lower end portion of the air duct 320 is attached to the sleeve 310, and for example, as shown in fig. 3 and 4, the lower end portion of the air duct 320 is inserted into a wall surface 312 of the sleeve 310 extending toward the inner wall of the housing 100 in the radial direction of the sleeve 310. The lower end of the air duct 320 is connected to the space 311, that is, the lower end of the air duct 320 is inserted through the wall surface 312 of the sleeve 310, so that the space inside the air duct 320 is connected to the space 311. The upper end of the air duct 320 extends to an end of the liquid storage chamber 120 near the air outlet 140. It should be noted that, the number of the air ducts 320 may be one or more, and when the number of the air ducts 320 is plural, the plurality of air ducts 320 are inserted in the wall surface 312 of the sleeve 310 at intervals along the circumferential direction of the sleeve 310.

It should be noted that, after the atomized liquid is injected into the liquid storage cavity 120, the space in the liquid storage cavity 120 is not completely filled with the atomized liquid, that is, a liquid-free space 1000 is formed between the liquid surface of the atomized liquid and the top of the liquid storage cavity 120. The function of the liquid-free space 1000 is to store a part of air, so that the liquid-free space 1000 has certain air pressure, and when the atomizer is in an unused state, the air pressure in the liquid-free space 1000, the air pressure in the air outlet channel 130 and the external atmospheric pressure basically keep static balance, so that the problem of leakage of the atomized liquid in the liquid storage cavity 120 can be prevented; when the atomizer is in use, the flow rate of the gas increases due to the suction of the user in the gas outlet channel 130, so that the air pressure of the gas in the gas outlet channel 130 is reduced, a pressure difference is generated between the reduced air pressure in the gas outlet channel 130 and the air pressure in the liquid-free space 1000, and a negative pressure is formed, under the action of the negative pressure, the atomized liquid in the liquid storage cavity 120 is continuously introduced into the liquid guide 210 through the liquid inlet 222, so that the atomized core 200 is heated and atomized to generate smoke and is supplied to a suction person who is sucking. On the contrary, if the liquid-free space 1000 is not provided, that is, the liquid storage cavity 120 is filled with atomized liquid, at this time, the inside of the whole liquid storage cavity 120 is in a vacuum state, when the atomizer is in a use state, no matter how the air pressure in the air outlet channel 130 changes, because the air pressure in the whole liquid storage cavity 120 is zero, that is, the air pressure in the air outlet channel 130 does not generate negative pressure relative to the liquid storage cavity 120, the atomized liquid in the liquid storage cavity 120 is not led into the liquid guide 210 through the liquid inlet 222, so that the liquid guide 210 has the problem of liquid shortage and dry combustion.

Thus, in the embodiment of the present application, it is preferable that the upper end portion of the air duct 320 extends to the end of the liquid storage chamber 120 near the air outlet 140, and the upper end portion of the air duct 320 is disposed in the liquid-free space 1000, in order that the upper end portion of the air duct 320 is disposed above the liquid level of the atomized liquid in the liquid storage chamber 120, that is, the upper end portion of the air duct 320 is directly communicated with the liquid-free space 1000. Then, after the outside air enters from the air return hole 221, the outside air directly enters the liquid-free space 1000 along the upper end portion of the air duct 320 and the space 311, thereby increasing the air pressure of the air in the liquid-free space 1000 and increasing the air pressure in the liquid storage chamber 120. In addition, the upper end of the air duct 320 is disposed in the liquid-free space 1000, and since there is no atomized liquid in the liquid-free space 1000, the atomized liquid in the liquid storage chamber 120 can be prevented from flowing into the air duct 320, so that the external air can flow into the liquid-free space 1000 more smoothly, and the air pressure of the air in the liquid-free space 1000 can be increased more rapidly.

Capillary structure 330 is formed within air return assembly 300, for example, capillary structure 330 is formed within air duct 320 of air return assembly 300. Of course, in other embodiments of the present application, the capillary structure 330 may be formed in the space 311, but since the lower end portion of the sleeve 310 is connected with the connecting portion 223 in a sealing manner, no atomized liquid flows into the space 311, in which case, if the capillary structure 330 is formed in the space 311, the external air slows down the flow rate from the air return hole 211 into the air guide tube 320 due to the capillary structure 330. Of course, the number of the capillary structures 330 in the embodiment of the present application may be plural, for example: the upper and lower ends of the air duct 320 are respectively formed with a capillary structure 330, etc., which is not limited thereto.

The capillary structure 330 has the function that after the external air enters the capillary structure 330, capillary air resistance can be formed in the capillary structure 330, at this time, the atomized liquid in the liquid storage cavity 120 cannot flow in the capillary structure 330 due to the blocking of the capillary air resistance, and the capillary air resistance formed in the capillary structure 330 cannot influence the flow of the gas, i.e. the external air can still flow in the capillary structure 330. In other words, the capillary structure 330 is a "vent-to-liquid" structure, so that the external air can enter the liquid storage chamber 120 through the air return hole 221, the space 311, the air guide pipe 320, and at least one capillary structure 330 in the air return assembly 300, thereby returning air into the liquid storage chamber 120.

It should be noted that, in the technical field of electronic atomization, the term "back air" refers to that when the total pressure of the gas and the liquid in the liquid storage cavity 120 is smaller than the external gas pressure in the air outlet channel 130 connected to the outside, the air in the liquid storage cavity 120 generates a negative pressure with respect to the air outlet channel 130, and as the pressure in the liquid storage cavity 120 is continuously reduced, the negative pressure is continuously increased, and when the negative pressure reaches a certain threshold value, the pressure of the external gas breaks through the pressure in the liquid storage cavity 120 and enters into the liquid storage cavity 120 through the opening on the side wall of the atomization core shell 220, that is, the external gas enters into the liquid storage cavity 120. The pressure in the reservoir 120 includes the pressure of the gas against the atomized liquid, the pressure of the atomized liquid against the sidewall of the atomizing core 220, and the gravity of the atomized liquid itself. After the external air returns to the liquid storage cavity 120, the pressure in the liquid storage cavity 120 is increased again, so that the air pressure outside the liquid storage cavity 120 and the pressure in the liquid storage cavity 120 are restored to the balance state again, and the atomized liquid in the liquid storage cavity 120 can flow out again.

Because the capillary structure 330 is formed in the air return assembly 300, when the atomized liquid in the liquid storage chamber 120 flows into the liquid guide 210 from the liquid inlet 222, the atomized liquid may also flow into the air guide 320 and the space 311 from the upper end of the air guide 320 through the at least one capillary structure 330 formed in the air return assembly 300, but the atomized liquid flowing into the capillary structure 330 is not completely filled in the whole capillary structure 330 due to the air resistance of the capillary structure 330. In this way, the atomized liquid cannot reach the air duct 320 and the space 310 from the upper end portion of the air duct 320 due to the air resistance of the capillary structure 330, and in addition, since the air return hole 221 is located closer to the air outlet channel 130 than the liquid inlet hole 222, that is, the air return hole 221 is located higher than the liquid inlet hole 222 in the axial direction of the atomized core 220, the pressure of the liquid in the liquid storage cavity 120 received at the air return hole 221 is smaller than the liquid pressure in the liquid storage cavity 120 received at the liquid inlet hole 222, so that the external air can smoothly pass through the air return hole 2221, the sleeve 310 including the space 311, the air duct 320 and the at least one capillary structure 330 formed in the air return assembly 300 and enter the liquid storage cavity 120; in contrast, since the pressure of the liquid received at the liquid inlet 222 is greater than the hydraulic pressure received at the return air hole 221, only a small portion of the gas or even no gas enters the liquid storage chamber 120 through the liquid inlet 222, and when the atomized liquid in the liquid storage chamber 120 is introduced into the liquid guide 210 through the liquid inlet 222, the atomized liquid receives little or no gas resistance, and thus can flow into the liquid guide 210 through the liquid inlet 222 more smoothly. As can be seen from the above, the atomized liquid in the liquid storage cavity 120 is introduced into the liquid guide 210 through the liquid inlet 222, the liquid guide path and the external air are introduced into the liquid guide 210 through the air return hole 221, the spacing space 311, the air guide pipe 320 and at least one capillary structure 330 formed in the air return assembly 300, and the air return path of the air return to the liquid storage cavity 120 is two different paths independent of each other, and a liquid pressure difference exists between the air return hole 221 and the liquid inlet 222, and the liquid pressure received at the liquid inlet 222 is greater than the liquid pressure received at the air return hole 221, so that the atomized liquid can break through the resistance of the air to be introduced into the liquid guide 210 through the air return hole 221, the spacing space 311, the air guide pipe 320 and at least one capillary structure 330 formed in the air return assembly 300 more smoothly, and continuously enter into the liquid storage cavity 120, so that the air pressure in the liquid storage cavity 120 can be kept in a state of being balanced with the external air pressure in the air outlet channel 130, and further the atomized liquid in the liquid storage cavity 120 can be ensured to pass through the liquid guide hole 221, the liquid guide 210 is prevented from being damaged, and the whole life of the atomized liquid guide 210 is prolonged, and the life of the atomized liquid guide 210 is prolonged.

Further, since the lower end portion of the sleeve 310 is hermetically connected to the connection portion 223, the atomized liquid in the liquid storage chamber 120 does not enter the space 311 and the air duct 320 from the lower end portion of the sleeve 310. Thus, in the embodiment of the present application, it is preferable that the capillary structure 330 is provided in the air duct 320, so that the atomized liquid can be prevented from entering the space 311 from the air duct 320. In this case, the capillary structure 330 may be arranged in several ways, one is that the capillary structure 330 is formed in the whole space inside the tube of the air duct 320, and the other is that the capillary structure 330 is formed in a part of the space inside the tube of the air duct 320. When the capillary structure 330 is formed in a part of the space inside the tube of the air duct 320, the capillary structure 330 may be provided at the upper end portion of the air duct 320 (fig. 3) or may be provided at the lower end portion of the air duct 320 (not shown). The capillary structure 330 may be provided at an upper end portion of the air duct 320 and a lower end portion (not shown) of the air duct 320, and is not limited thereto.

Further, referring to fig. 4, when the capillary structure 330 is formed in a portion of the space inside the tube of the air duct 320, at least one air duct 340 having a second distance L2 is further formed in the air duct 320, the first distance L1 of the capillary structure 330 is smaller than the second distance L2 of the air duct 340, and the first distance L1 is smaller than the minimum distance of the space 311 in the radial direction of the atomizing core 220. That is, the capillary structure 330 and the air guide channel 340 in the present embodiment are disposed in the air guide tube 320 and the space 311.

More preferably, in the embodiment of the present application, as shown in fig. 3 and 4, a capillary structure 330 is formed in the upper end portion of the air duct 320. In this case, an air guide passage 340 is formed in the lower end portion of the air guide tube 320, and the air guide passage 340 communicates with the space 311. In this structure, the external air cannot enter the air guide tube 320 through the capillary structure 330 formed at the upper end portion of the air guide tube 320, and even if a small amount of liquid enters, the external air stays in the capillary structure 330 and does not continue into the air guide channel 340. At this time, the air return hole 221, the space 311, the air guide channel 340, the capillary structure 330 and the liquid storage chamber 120 are sequentially communicated to form an air return path. Thus, when the external air flows from the space 311 through the air guide channel 340 and the capillary structure 330 in the air guide tube 320 and enters the liquid storage chamber 120, since no atomized liquid or only a small amount of atomized liquid stays in the space 311 and the air guide tube 320, the external air is not subjected to the resistance of the atomized liquid or is subjected to the resistance of the small atomized liquid in the space 311 and the air guide tube 320, the flow rate of the external air in the space 311 and the air guide tube 320 is increased, and the external air can smoothly flow through the space 311 and the air guide tube 320 and enter the liquid storage chamber 120, so that the air pressure in the liquid storage chamber 120 is increased.

Further, the upper end portion of the air duct 320 may be extended into the liquid-free space 1000, so that the atomized liquid in the liquid storage chamber 120 can be further prevented from flowing into the air duct 340 from the upper end portion of the air duct 320. In this case, the air return hole 221, the space 311, the air guide channel 340, the capillary structure 330 and the liquid-free space 1000 in the liquid storage cavity 120 are sequentially communicated and form an air return path, that is, the external air can return air to the liquid-free space 1000 in the liquid storage cavity 120 along the air return path, so that the air pressure of the air in the liquid storage cavity 120 is increased.

Further, referring to fig. 4, capillary structure 330 is a capillary gap 331. The width of the capillary gap 331 along the radial direction of the air duct 320 is a first interval L1, the first interval L1 is 0.1mm-1mm, and by reasonably designing the size of the capillary gap 331 to be 0.1mm-1mm, after external air enters the capillary gap 331 through the air return hole 221, capillary air resistance can be formed in the capillary gap 331, so that atomized liquid can be prevented from entering the air duct 340 through the capillary air resistance formed in the capillary gap 331. As for the specific size and specific length of the capillary gap 331, it is possible to set the specific size and specific length according to the degree of the consistency of the atomized liquid, for example, when the consistency of the atomized liquid is relatively large, the width of the capillary gap 331 may be set to be slightly larger; when the concentration of the atomized liquid is smaller, the width of the capillary gap 331 can be set to be smaller, so long as capillary air resistance can be formed in the capillary gap 331, so that the effect that the outside air passes through and the atomized liquid cannot pass through can be met.

In addition, in order to enable the capillary air lock formed in the capillary gap 331 to block the atomized liquid, in this embodiment, the length of the capillary gap 331 along the axial direction of the air duct 320 is 3mm or more. If the length of the capillary gap 331 is less than 3mm, the atomized liquid may break through the capillary air resistance of the capillary gap 331 and be introduced into the air guide channel 340.

As can be seen from the above embodiments, the capillary structure 330 can be disposed in the air duct 320, and thus, in other embodiments of the present application, when the capillary structure 330 is not formed in the air duct 320, the following arrangements of the capillary structure 330 are also possible:

in some structural designs, as shown in fig. 6 and 7, the air return assembly 300 further includes a partition member 350, the partition member 350 is sealed and sleeved on the outer periphery of the inner tube portion 110, and the outer peripheral wall of the partition member 350 is in sealing abutment with the inner side wall of the housing 100, so that a liquid-free space 1000 is formed between the partition member 350 and the inner wall of the end, close to the air outlet 140, of the liquid storage cavity 120. At this time, the capillary structure 330 is a capillary channel 351, at least one capillary channel 351 is arranged on the partition 350 along the axial direction of the partition 350, and the capillary channel 351 is communicated with the liquid-free space 1000 and the liquid storage cavity 120. One end of the air duct 320 near the air outlet 140 is connected to the partition 350, and the air duct 320 is connected to the liquid-free space 1000.

In this embodiment, the partition 350 has an annular structure, and the partition 350 having an annular structure is sleeved on the outer periphery of the inner tube 110. One end of the partition 350, which is away from the air outlet 140, is provided with a mounting through hole 352 in a penetrating manner along the axial direction of the partition 350, the mounting through hole 352 is arranged at a part of the partition 350 between the capillary channel 351 and the inner peripheral wall of the partition 350, and the upper end part of the air duct 320 is inserted into the mounting through hole 352 in a sealing manner, so that the upper end part of the air duct 320 is communicated with the liquid-free space 1000.

Further, flanges 353 are provided on both the outer circumference and the inner circumference of the end face of the partition 350 near the air outlet 140, and the end face of the flange 353 far from the partition 350 and near the air outlet 140 is in sealing abutment against the top inner wall of the housing 100, so that a liquid-free space 1000 is formed between the end face of the partition 350 near the air outlet 140, the top inner wall of the housing 100 and the inner tube 110, and the liquid-free space 1000 is communicated with the outside through the air duct 320, the space 311, the air return hole 221 and the air outlet channel 130. The effect of this no liquid space 1000 is, because no liquid space 1000 is linked together with the external world, when promptly through injecting into the atomized liquid to stock solution intracavity 120, can guarantee to keep relatively balanced between the atmospheric pressure in stock solution intracavity 120 and the atmospheric pressure of external world to can avoid the circumstances that the atmospheric pressure increases to appear in stock solution intracavity 120 because of the volume of atomized liquid increases gradually. If the liquid-free space 1000 is not communicated with the outside, the air pressure in the liquid storage cavity 120 is greater than the air pressure of the outside, so that atomized liquid can be injected into the liquid storage cavity 120 only by a larger external force, and even can not be injected into the liquid storage cavity 120. Conversely, under the circumstance that the atomized liquid gradually decreases, the air pressure in the liquid storage cavity 120 also decreases, because the liquid-free space 1000 is communicated with the outside, in order to keep the air pressure in the liquid storage cavity 120 balanced with the outside air pressure, the outside air enters the capillary structure 330 and the air guide channel 340 through the air return hole 221 and enters the liquid-free space 1000, and then enters the capillary channel 351 and the liquid storage cavity 120, so that the purpose of returning air into the liquid storage cavity 120 is achieved, and the air pressure in the liquid storage cavity 120 can be basically leveled with the outside air pressure after returning air.

Further, the pore diameter of the capillary passage 351 is 0.2mm to 2mm, where the pore diameter of the capillary passage 351 is the size of the capillary passage 351 in the radial direction of the separator 350, that is, the first pitch L1 in fig. 7. In the embodiment of the application, by reasonably designing the aperture of the capillary channel 351 to be 0.2mm-2mm, atomized liquid in the liquid storage cavity 120 can not enter the liquid-free space 1000 which is communicated with the capillary channel 351 under the air resistance action of the capillary channel 351, and meanwhile, external air can enter the liquid storage cavity 120 through the air return hole 221, the interval space 311 and the air guide channel 340 (as shown in fig. 7, the air guide channel 340 is formed in the pipe space of the air guide pipe 320), the liquid-free space 1000 and the capillary channel 351, so that the arrangement of the capillary channel 351 can prevent atomized liquid from entering the air guide channel 340 through the capillary channel 351 and the liquid-free space 1000, and can enable external air to return air to the liquid storage cavity 120 through the capillary channel 351. It should be noted that, the aperture of the capillary channel 351 (i.e., the first pitch L1) is smaller than the pitch of the air duct 320 along its own radial direction (i.e., the second pitch L2), and the aperture of the capillary channel 351 is also smaller than the minimum pitch of the spacing space 311 along the radial direction of the atomizing core housing 220.

In this embodiment, the specific size and specific length of the capillary channel 351 can be set according to the concentration degree of the atomized liquid, for example, when the concentration degree of the atomized liquid is relatively large, the aperture of the capillary channel 351 can be set to be a little larger; when the concentration of the atomized liquid is smaller, the pore diameter of the capillary channel 351 can be set to be smaller, so long as capillary air resistance can be formed in the capillary channel 351 to meet the effect that the outside air passes through and the atomized liquid cannot pass through, and the pore diameter of the capillary channel 351 is not limited in the application.

Further, in order to enable the capillary air lock formed by the capillary channel 351 to block the atomized liquid, in this embodiment, the length of the capillary channel 351 along the axial direction of the atomizing core housing 220 is 3mm or more, and if the length of the capillary channel 351 is less than 3mm, the atomized liquid may break through the capillary air lock and be introduced into the liquid-free space 1000 and the air guide channel 340.

In other structural designs, as shown in fig. 8 and 9, the air return assembly 300 further includes at least one air return pipe 360, the air return pipe 360 is connected to an end of the air guide pipe 320 near the air outlet 140 (i.e. an upper end portion of the air guide pipe 320), the capillary structure 330 is a capillary channel 361, and the capillary channel 361 is at least partially formed in the air return pipe 360, and the capillary channel 361 communicates the air guide pipe 320 with the liquid storage cavity 120.

In the embodiment of the present application, when the upper end of the air duct 320 is a closed port or the upper end of the air duct 320 is connected with the top inner wall of the liquid storage cavity 120 in a sealing manner, the air return pipe 360 is connected to the side wall of the upper end of the air duct 320, and the space in the air return pipe 360 is communicated with the space in the air duct 320. It should be noted that, the air return pipes 360 may be straight pipes, bent pipes or other irregular pipes, and the number of the air return pipes 360 and the number of the air guide pipes 320 may be set to be equal, or may also be set to be unequal, for example: one air duct 320 may have 2 or more air return ducts 360 connected thereto, and the like, and is not limited thereto.

There may be two arrangements in which the capillary passage 361 is at least partially formed in the muffler 360, one in which the capillary passage 361 is formed in the entire intra-tube space in the muffler 360 and the other in which the capillary passage 361 is formed in a part of the intra-tube space in the muffler 360. In the embodiment of the present application, it is preferable that the capillary passage 361 is formed in the entire space inside the air return pipe 360, so that the atomized liquid can be prevented from flowing from the air return pipe 360 into the air guide pipe 320.

Further, as shown in FIG. 9, the distance between the capillary channels 361 in the radial direction of the air return pipe 360 (i.e., the first distance L1) is 0.2mm-2mm, and the length of the capillary channels 361 in the axial direction of the air return pipe 360 is 3mm or more. The capillary passage 361 in the embodiment of the present application has the same effect as the capillary passage 351 at the partition 350 in the above embodiment, and detailed description is omitted herein with specific reference to the above description.

In still other structural designs, as shown in fig. 10, the air return assembly 300 further includes an air return cap 370, the air return cap 370 is sleeved on the outer periphery of the inner tube 110 and is connected with the top inner wall of the housing 100, one end portion of the air duct 320 close to the air outlet 140 is installed in the air return cap 370, the capillary structure 330 is a capillary channel 371, at least one capillary channel 371 is provided on the air return cap 370, the capillary channel 371 extends from the outer side wall 401 of the air return cap 370 towards the axial center direction of the air return cap 370, and the capillary channel 371 communicates the air duct 320 with the liquid storage cavity 120.

In the embodiment of the present application, when the air-return cap 370 is sleeved on the outer periphery of the inner tube 110 and is connected to the top inner wall of the casing 100, the inner peripheral wall of the air-return cap 370 may be connected to the outer peripheral wall of the inner tube 110, or the inner peripheral wall of the air-return cap 370 may be disposed at a distance from the outer peripheral wall of the inner tube 110, which is not limited herein. The end of the air duct 320 near the air outlet 140 is mounted in the air return cap 370, and the end of the air duct 320 near the air outlet 140 is referred to as the upper end of the air duct 320, that is, the upper end of the air duct 320 is mounted in the air return cap 370, and at least one capillary channel 371 is provided in the air return cap 370. For example, as shown in fig. 10, capillary channel 371 extends from outer side wall 401 of air-return cap 370 into air-return cap 370 toward the axial direction of air-return cap 370, while the upper end portion of air-guide tube 320 is inserted into air-return cap 370 from bottom surface 402 of air-return cap 370 at the end facing away from air-outlet 140, and the upper end portion of air-guide tube 320 communicates with capillary channel 371, and since capillary channel 371 communicates with liquid reservoir 120, capillary channel 371 communicates with air-guide tube 320 with liquid reservoir 120. It should be noted that, capillary channel 371 may be disposed in air-back cap 370 along the radial direction of air-back cap 370, or capillary channel 371 may be disposed in air-back cap 370 obliquely with respect to the radial direction of air-back cap 370. In embodiments of the present application, the number of capillary channels 371 may be one or more. Preferably, the number of capillary channels 371 and the number of air ducts 320 may be set equal; of course, in other embodiments of the present application, the number of capillary channels 371 and the number of air ducts 320 may also be set to be unequal, and is not limited herein.

Further, the pitch of capillary channel 371 in the axial direction of air return cap 370 is 0.2mm-2mm, and the length of capillary channel 371 in the radial direction of air return cap 370 is 3mm or more. Capillary channel 371 in the embodiments of the present application has the same effect as capillary channel 351 at separator 350 in the above embodiments, and is not described in detail herein with reference to the above description.

It should be noted that, when the capillary structure 330 is disposed on the partition 350 or the air return pipe 360 or the air return cap 370, the capillary structure 330 may be disposed in the air guide pipe 320, for example, a section of the capillary structure 330 is disposed at the upper end of the air guide pipe 320, so as to further prevent a small amount of atomized liquid from flowing into the air guide pipe 320 from the capillary structure 330 disposed on the partition 350 or the air return pipe 360 or the air return cap 370. Of course, in normal circumstances, the atomized liquid in the liquid storage cavity 120 will not flow into the capillary structure 330 due to the capillary air resistance of the capillary structure 330, so in the embodiment of the application, as long as the capillary structure 330 is disposed on the partition 350, the air return pipe 360 or the air return cap 370, the whole space in the air guide pipe 320 is preferably formed with the air guide channel 340, so that the external air entering the air guide channel 340 formed in the air guide pipe 320 via the space 311 can enter the liquid storage cavity 120 smoothly and rapidly.

Correspondingly, the embodiment of the application also provides an electronic atomization device, which comprises the atomizer in any embodiment. The electronic atomization device further comprises a battery assembly (not shown), wherein the battery assembly is electrically connected with the heating element in the atomizer and is used for providing current for the heating element so that the heating element can generate heat after being electrified and heat atomized liquid which is atomized and conducted to the heating element.

In some specific application scenarios, the battery assembly of the embodiment may be a power supply of a lithium battery or the like, and in addition, the electronic atomization device of the embodiment may further include a control circuit board, wherein the control circuit board is electrically connected with the battery assembly and the heating element respectively, and when in use, the control circuit board can control the battery assembly to supply power to the heating element, so that the heating element is electrified and heats to atomize the atomized liquid conducted to the heating element into aerosol which can be sucked by a user.

In this embodiment, the electronic atomization device of the present embodiment may be specifically an electronic cigarette, and the electronic atomization device of the present embodiment has the same technical effects as the above-mentioned atomizer due to the improvement of the above-mentioned atomizer, and will not be described herein.

It should be noted that, please refer to the prior art for other contents of the atomizer and the electronic atomization device disclosed in the embodiments of the present application, and the description thereof is omitted herein.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims

1. An atomizer, comprising:

An air return assembly, the air return assembly comprising:

2. The nebulizer of claim 1, wherein the capillary structure is formed within the entire intra-tube space of the airway tube; or,

the capillary structure is formed in part of the space in the air duct.

3. The atomizer of claim 2 wherein said capillary structure is spaced apart by a first spacing, and when said capillary structure is formed in a portion of said air duct interior space, at least one air duct is also formed in said air duct with a second spacing, said first spacing being less than said second spacing, and said first spacing being less than a minimum spacing of said spacing space in a radial direction of said atomizing core housing.

4. A nebulizer as claimed in claim 3, wherein when the capillary structure is formed in an end of the air duct away from the sleeve, the air duct is formed in an end of the air duct close to the sleeve, and the air return hole, the space, the air duct, the capillary structure and the liquid storage chamber are sequentially communicated and form an air return path.

5. A nebulizer as claimed in claim 3, wherein the capillary structure is a capillary gap, a width of the capillary gap in a radial direction of the air duct is the first pitch, the first pitch is 0.1mm-1mm, and a length of the capillary gap in an axial direction of the air duct is 3mm or more.

6. The nebulizer of claim 1, wherein the capillary structure is a capillary channel, the air return assembly further comprising:

the separation piece is arranged on the periphery of the inner pipe in a sealing manner, the peripheral wall of the separation piece is in sealing abutting connection with the inner side wall of the outer shell, a liquid-free space is formed between the separation piece and the inner wall of one end of the liquid storage cavity, which is close to the air outlet, at least one capillary channel is penetrated on the separation piece along the axial direction of the separation piece, the capillary channel is communicated with the liquid-free space and the liquid storage cavity, and the length of the capillary channel along the axial direction of the separation piece is more than or equal to 3mm;

7. The atomizer of claim 1 wherein said capillary structure is a capillary channel, said air return assembly further comprising an air return tube, at least one of said air return tubes being connected to an end of said air duct adjacent said air outlet, said capillary channel being at least partially formed in said air return tube, said capillary channel communicating said air duct with said liquid storage chamber, said capillary channel having a length of 3mm or more along an axial direction of said air return tube.

8. The atomizer of claim 1 wherein said capillary structure is a capillary channel, said air return assembly further comprises an air return cap, said air return cap is sleeved on the outer periphery of said inner tube and connected to the top inner wall of said housing, said air duct is mounted in said air return cap near one end of said air outlet, and said air return cap is provided with at least one capillary channel extending from the outer side wall of said air return cap toward the axial direction of said air return cap and communicating said air duct with said liquid storage chamber, and said capillary channel has a length of 3mm or more along the radial direction of said air return cap.

9. A nebulizer as claimed in any one of claims 6 to 8, wherein the capillary passage has a pore diameter of 0.2mm-2mm, the capillary passage has a pore diameter smaller than the interval of the air duct in its own radial direction, and the capillary passage has a pore diameter smaller than the minimum interval of the interval space in the radial direction of the nebulizing core housing.

10. An electronic atomizing device, characterized in that it comprises an atomizer according to any one of claims 1 to 9.