Atomization assembly, atomizer and aerosol generating device

Abstract

The application discloses an atomization assembly, an atomizer and an aerosol generating device. The atomizer comprises a housing, a liquid storage cavity is formed in the housing for storing a liquid substrate; an atomization assembly for atomizing the liquid substrate to form an aerosol, the atomization assembly comprises a heating element and a porous body for transferring the liquid substrate, the porous body has a liquid suction surface in fluid communication with the liquid storage cavity and an atomization surface for carrying the heating element; and a sealing element, at least a portion of the sealing element surrounds the porous body; wherein a surface of the porous body is recessed to form at least one air passage, at least a portion of the air passage extends from the liquid suction surface towards the atomization surface, and an air flow path for air to enter the liquid storage cavity is defined between the sealing element and the air passage. The above atomizer effectively improves the problem of poor liquid guiding in the liquid storage cavity caused by negative pressure due to the air passage arranged on the atomization assembly.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the field of aerosol generating devices, and in particular to an atomizer and an aerosol generating device. BACKGROUND

[0002] An aerosol generating device includes an atomizer and a power supply device, the atomizer is internally provided with an atomization assembly, and the atomization assembly atomizes a liquid substrate to form an aerosol by being driven by the power supply device. As an example of conventional technology, the atomization assembly includes a liquid guide body of a porous material and a heating element, which can be integrally formed or assembled together. The liquid guide body is used to transfer the liquid substrate in a liquid storage cavity to the heating element, and the heating element is used to heat and evaporate the liquid substrate to generate an aerosol. During the atomization process, as the liquid substrate is consumed, a negative pressure is formed inside the liquid storage cavity. The pressure difference between the inside of the liquid storage cavity and the ambient atmosphere weakens or prevents the transfer of the liquid substrate in the porous material, which reduces or even stops the liquid guiding rate of the liquid guide body. As a result, the atomization rate of the atomization assembly and the liquid guiding rate cannot be balanced, and the lack of liquid substrate can cause the temperature near the heating element to be locally too high, which can easily generate undesirable substance components inside the atomizer and other adverse effects, affecting the user experience.

[0003] As an example of the prior art, the existing atomizer usually provides a gas guide hole on a sealing member of the liquid storage cavity, which provides a path for the ambient atmosphere to enter the liquid storage cavity. This type of air inlet process is easily affected by various adverse factors, such as the sealing member being easily squeezed and deformed during assembly to close the gas guide hole. As another adverse factor, the gas guide hole is far away from the heating element, and it is difficult to find a balance point between the liquid guiding rate and the atomization rate, especially for liquid substrates with low fluidity or high viscosity. The liquid substrate is distributed around the gas outlet port of the gas guide hole, which hinders the escape of air bubbles in the liquid storage cavity. SUMMARY

[0004] To solve the problem of poor liquid guiding in the atomizer of the prior art, embodiments of the present application provide an atomizer, which includes a housing, a liquid storage cavity formed in the housing for storing a liquid substrate, an atomization assembly for atomizing the liquid substrate to form an aerosol, the atomization assembly including a heating element and a porous body for transferring the liquid substrate, the porous body having a liquid absorbing surface in fluid communication with the liquid storage cavity and an atomization surface for carrying the heating element, and a sealing member, at least a portion of the sealing member surrounding the porous body, wherein a surface of the porous body is recessed to form at least one air passage, at least a portion of the air passage extending from the liquid absorbing surface toward the atomization surface, and the sealing member and the air passage defining an air flow path for air to enter the liquid storage cavity.

[0005] Preferably, in the above technical solution, the air passage comprises a first section extending on the liquid suction surface.

[0006] Preferably, in the above technical solution, the porous body comprises a plurality of side surfaces connected between the liquid suction surface and the atomization surface; the air passage comprises a second section extending on the side surface, the second section being communicated with the first section.

[0007] Preferably, in the above technical solution, the first section extends on the liquid suction surface to form a terminal end, the sealing member covers a portion of the liquid suction surface and does not cover the terminal end.

[0008] Preferably, in the above technical solution, the first section is branched on the liquid suction surface to form two grooves communicated with the first section.

[0009] Preferably, in the above technical solution, the sealing member covers at least a portion of the side surface and does not completely cover the second section.

[0010] Preferably, in the above technical solution, the depth of the first section is greater than the depth of the second section, or the width of the first section is greater than the width of the second section.

[0011] Preferably, in the above technical solution, the air passage further comprises a connecting section located on the liquid suction surface; the connecting section connects the first section and the second section.

[0012] Preferably, in the above technical solution, the connecting section extends at least partially along the length direction of the liquid suction surface, and the first section extends at least partially along the width direction of the liquid suction surface.

[0013] Preferably, in the above technical solution, the air passage comprises a first air passage and a second air passage formed on the surface of the porous body and separated from each other.

[0014] Preferably, in the above technical solution, the first air passage and the second air passage are centrally symmetrical with respect to the porous body.

[0015] Preferably, in the above technical solution, the atomizer further comprises a bottom cover fixedly connected to one end of the shell, and a separation member arranged between the atomization assembly and the bottom cover; an atomization cavity is defined between the separation member and the atomization assembly, and at least one liquid storage area is defined between the separation member and the bottom cover.

[0016] Preferably, in the above technical solution, the separation member is provided with at least one liquid guide opening for communicating the atomization cavity and the liquid storage area.

[0017] Preferably, in the above technical solution, the shell is further provided with an air outlet channel for outputting the aerosol; the air outlet channel extends longitudinally along the shell and is in fluid communication with the liquid guide opening.

[0018] Preferably, in the above technical solution, the liquid storage cavity has an opening for connecting the liquid absorption surface and the liquid storage cavity, and a projection of the opening on the liquid absorption surface is smaller than an area of the liquid absorption surface.

[0019] The present application also provides an aerosol generating device, which comprises the above-described atomizer and a power supply device for providing electric drive for the atomizer.

[0020] The present application also provides an atomization assembly for atomizing a liquid substrate to form an aerosol, characterized in that the atomization assembly comprises a heating element and a porous body for delivering the liquid substrate; the porous body has a liquid absorption surface in fluid communication with the liquid storage cavity, an atomization surface for carrying the heating element, and a plurality of side surfaces connected between the liquid absorption surface and the atomization surface; wherein the surface of the porous body is recessed to form at least one air passage, the air passage comprises a first section extending on the liquid absorption surface and a second section extending on the side surface from the liquid absorption surface towards the atomization surface, and the second section is in communication with the first section.

[0021] The present application has the beneficial effect that, since the surface of the porous body of the atomization assembly is recessed to form at least one air passage, at least a part of the air passage extends from the liquid absorption surface of the porous body towards the atomization surface, and a path formed between the air passage and the sealing member can be used for air to enter the liquid storage cavity, thereby preventing the formation of negative pressure in the liquid storage cavity. At the same time, the air passage provided on the surface of the porous body can prevent the sealing member from being squeezed and deformed to close the air guide hole during assembly. At the same time, the air passage is provided on the porous body, which is relatively close to the heating element, and even if the liquid substrate has high viscosity, the air outlet port of the air passage can also deliver the liquid substrate from the porous body to the atomization surface for atomization, without hindering air from entering the liquid storage cavity. BRIEF DESCRIPTION OF DRAWINGS

[0022] One or more embodiments are illustrated by way of example in the figures that form a part of this patent document, these example are not intended to limit the embodiments, elements having the same reference numbers in the figures indicate like elements unless otherwise expressly stated, the figures in the drawings do not constitute a proportional limitation.

[0023] Figure 1 is a schematic structural diagram of an aerosol generating device provided by an embodiment of the present application;

[0024] Figure 2 is a perspective view of an atomizer provided by an embodiment of the present application;

[0025] Figure 3is a cross-sectional view of an atomizer provided by an embodiment of the present application;

[0026] Figure 4 is an exploded view of the atomizer from one perspective provided by an embodiment of the present application;

[0027] Figure 5 is an exploded view of the atomizer from another perspective provided by an embodiment of the present application;

[0028] Figure 6 is a perspective view of a mouthpiece of the atomizer provided by an embodiment of the present application;

[0029] Figure 7 is a perspective view of a sealing member provided by an embodiment of the present application;

[0030] Figure 8 is an assembled perspective view of part of the atomizer provided by an embodiment of the present application;

[0031] Figure 9 is a perspective view of a porous body from one perspective provided by an embodiment of the present application;

[0032] Figure 10 is a perspective view of the porous body from another perspective provided by an embodiment of the present application;

[0033] Figure 11 is a perspective view of the porous body and the sealing member provided by an embodiment of the present application after assembly. DETAILED DESCRIPTION

[0034] In order to facilitate the understanding of the present application, the present application will be described in more detail below in conjunction with the drawings and specific embodiments.

[0035] It should be noted that all directional indications, such as upper, lower, left, right, front, back, horizontal, vertical, etc., in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly. The "connection" can be direct connection or indirect connection, and the "setting", "set in", and "provided in" can be direct setting or indirect setting.

[0036] In addition, the descriptions such as "first", "second", etc. in the present application are only for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features.

[0037] The present application provides an aerosol generating device, with reference to Figure 1As shown, the aerosol generating device comprises an atomizer 100 and a power supply device 200. The atomizer 100 stores a liquid substrate and atomizes the liquid substrate to form an aerosol. The power supply device 200 provides power for the atomizer 100. The atomizer 100 and the power supply device 200 can be fixedly connected or detachably connected. The atomizer 100 and the power supply device 200 can be detachably connected, such as magnetically connected, buckled, or the like. The specific connection mode is not limited. The atomizer 100 and the power supply device 200 are magnetically connected according to the embodiment of the present application. The first connecting end of the atomizer 100 is provided with a magnet or a magnetic element. The magnetic element comprises a ferromagnetic material. The second connecting end of the power supply device 200 is provided with a matching magnetic element or a magnet. The power supply device 200 can be divided into two parts along the longitudinal direction. The first part 201 can accommodate at least part of the surface of the atomizer 100. The second part 202 can accommodate a battery, a control module, a charging module, and other components of the power supply device.

[0038] Reference Figures 2 to 6 As shown, the atomizer 100 comprises a hollow shell 10. The two ends of the shell 10 are open. One end is connected with a mouthpiece 11. The other end can fixedly install other components of the atomizer. Specifically, the mouthpiece 11 is sleeved on at least part of the surface of the shell 10. The top end of the mouthpiece 11 is provided with a mouthpiece port 110 for outputting the aerosol to the outside of the atomizer 100. The opposite two outer sides of the shell 10 are provided with a fixing buckle 12. The inner side of the mouthpiece 11 is provided with a matching clamping groove. The mouthpiece 11 is fixedly connected with the shell 10 through the clamping groove 13 and the buckle 12. The shell 10 and the mouthpiece 11 are further provided with a sealing ring 13. The sealing ring 13 is arranged above the buckle 12, so that the two are sealingly connected.

[0039] The inner cavity of the shell 10 is divided into a liquid storage cavity 16 by at least two walls. The walls include a first wall 151 and a second wall 152 arranged oppositely and enclosing the inner wall of the shell 10 to form a liquid storage member 17. The open end of the liquid storage member 17 towards the suction port 110 is covered by a sealing cover 60, and the sealing cover 60 is provided with at least one exhaust hole 61. When the sealing cover 60 is assembled, the gas in the liquid storage cavity 16 will not be instantaneously compressed, thereby avoiding leakage of the liquid matrix from the other end of the liquid storage member 17. The suction nozzle 10 extends inwardly from the suction port 110 and is provided with a receiving portion 18 abutting the outer surface of the sealing cover 60. The receiving portion 18 has a grid structure inside, and the bottom end surface of the receiving portion 18 abuts the upper surface of the sealing cover 60. The bottom end surface of the receiving portion 18 is provided with a sealing column 181 which can just seal the exhaust hole 61. The upper surface of the sealing cover 60 is also provided with four fixing protrusions 62. Every two fixing protrusions 62 are distributed at the side edge of the sealing cover 60, and the fixing protrusions 62 longitudinally abut the two side surfaces of the receiving portion 18 of the suction nozzle 11, so that the suction nozzle 11 is fixedly connected to the upper end of the liquid storage member 17.

[0040] Two gas outlet channels 14 are symmetrically arranged on both sides of the liquid storage member 17, and the upper end of the gas outlet channel 14 communicates with the suction port 110. Specifically, the two gas outlet channels 14 are composed of two parts, namely a first gas outlet channel 141 and a second gas outlet channel 142. The first gas outlet channel 141 communicates with the second gas outlet channel 142 along the longitudinal direction of the shell 10, and the gas outlet end of the second gas outlet channel 142 communicates with the suction port 110. The first wall 151 and the second wall 152 respectively enclose the two side inner walls of the shell 10 to form the first gas outlet channel 141, and the two side outer surfaces of the receiving portion 18 and the two side inner walls of the suction nozzle 11 respectively enclose the second gas outlet channel 142.

[0041] The other end of the liquid storage member 17 opposite to the suction port 110 is provided with an opening 171, and the end of the liquid storage member 17 is formed with a groove 19, and the end surface of the groove 19 is in liquid communication with the opening 171. Further, the groove 19 is used to fix the atomization assembly 20, and the atomization assembly 20 can atomize the liquid matrix flowing out of the inside of the liquid storage cavity 16 to form an aerosol. Specifically, the atomization assembly 20 includes a porous body 21 and a heating element 22 for heating the liquid matrix sucked by the porous body 21. As an implementable example, the porous body 21 can be made of a hard porous material with a capillary structure inside, such as porous ceramic, porous glass, porous metal, porous high polymer polymeric material or shaped hard fiber, etc. The porous body 21 has a porous capillary structure inside which can absorb part of the liquid matrix and transfer the liquid matrix.

[0042] In the preferred embodiment of the present application, the porous body 21 is preferably a porous ceramic material, which is generally formed by sintering components such as aggregate, binder, pore-forming agent, etc. at high temperature, and has a large number of pore structures inside that are connected to each other and to the surface of the material, so that the liquid substrate can seep into the interior through the surface of the porous body and be atomized by the heating element 22 to form an aerosol. The heating element 22 can be a heating coating, a heating sheet, or a heating net. The heating coating can include, but is not limited to, a resistance heating film layer material, an electromagnetic induction heating coating, an infrared induction heating coating, etc. The heating sheet or the heating net can be fixed on the surface of the porous body or partially embedded in the interior of the porous body. As a preferred embodiment, the heating element 22 is preferably a conductive circuit formed on the surface of the porous body 21 by mixing a raw material powder with a printing aid to form a slurry and then sintering after printing, which has the effects of high atomization efficiency, less heat loss, preventing dry burning or greatly reducing dry burning, etc. The heating element 22 can be made of stainless steel, nickel-chromium alloy, iron-chromium-aluminum alloy, titanium, etc. in some embodiments.

[0043] The present application provides an embodiment of the porous body 21, as shown in Figures 4 to 11 The porous body 21 is generally block-shaped and includes six surfaces, of which the liquid suction surface 211 is arranged towards the opening 171, the atomization surface 212 is arranged opposite to the liquid suction surface 211, and the four side surfaces 24, including the first side surface 241, the second side surface 242, and the third side surface 243 and the fourth side surface 244, are connected between the liquid suction surface 211 and the atomization surface 212. The heating element 22 is formed on the atomization surface 212. The liquid substrate flowing out of the liquid storage cavity 16 flows into the liquid suction surface 211 through the opening 171, and is transmitted to the atomization surface 212 through the interior of the porous body 21, and is atomized by the heating element 22 to form an aerosol.

[0044] A sealing member 30 is further arranged between the porous body 21 and the liquid storage member 17, which is accommodated in the groove 19 and positioned between the inner wall of the groove 19 and the outer surface of the porous body 21. The sealing member 30 at least surrounds part of the outer surface of the porous body 21, which can prevent the liquid substrate from seeping downward. The sealing member 30 is preferably made of flexible silicone material and is generally sleeve-shaped, which is sleeved on the outer surface of the porous body 21. A notch 31 is further arranged on the upper surface of the sealing member 30, which has the same size as the opening 171, so that the liquid substrate in the liquid storage cavity 16 can be smoothly guided into the liquid suction surface 211. Two reinforcing ribs are arranged on the outer surface of the sealing member 30, including the first reinforcing rib 321 and the second reinforcing rib 322. The first reinforcing rib 321 is arranged around the opening 171, and the second reinforcing rib 322 is arranged close to the upper end surface of the groove 19, so as to enhance the sealing fit between the sealing member 30 and the liquid storage member 17.

[0045] The open end of the shell 10 opposite the nozzle 110 is fixedly connected with a bottom cover 40, the bottom cover 40 including a base 41 covering the open end of the shell 10, and a side wall 42 arranged around the inner wall surface of the shell 10. The upper end surface of the base 41 and the side wall 42 form a first flange 421, facilitating fixed connection between the end portions of the shell 10. The base 41 is fixedly connected with positive and negative electrodes 70, the positive and negative electrodes 70 penetrating the base 41 and extending longitudinally along the shell 10 to electrically connect with the two ends of the heating element 22. The atomizer 100 is electrically connected with the power supply device 200 through the positive and negative electrodes 70, so that the power supply device 200 provides electrical driving for the atomization assembly 20. An air inlet 90 for external air to enter is arranged between the positive and negative electrodes 70. The air inlet 90 includes a first air inlet 91 and a second air inlet 92, arranged near the end portions of the side wall 42 respectively, and the air outlet end of the air inlet 90 is arranged higher than the surrounding plane.

[0046] The entire side wall 42 encloses an open containing cavity 43, and the open end of the containing cavity 43 is provided with a partition 50. Specifically, the partition 50 is generally boat-shaped, including a support portion 51 with two side end portions protruding, the support portion 51 being at least partially sleeved on the outside of the side wall 42 of the bottom cover 40, the side wall 42 of the bottom cover 40 being provided with a second flange 421, and the lower end surface of the main body portion 51 being longitudinally abutted with the upper end surface of the second flange 421. The support portion 51 is arranged around the inner wall surface of the shell 10, and a reinforcing rib 511 is arranged on the outer surface of the support portion 51 to further seal and fixedly connect to the inner wall surface of the shell 10. The partition 50 further includes a main body portion 52 arranged at least partially opposite the atomization surface 212, and the region between the main body portion 52 and the atomization surface 212 is the atomization cavity 23. The main body portion 52 is provided with an air passage hole 53 communicating with the air inlet 90, the air passage hole 53 being located substantially in the middle of the main body portion 52 and arranged opposite the atomization surface 212. Since the first air inlet 91 and the second air inlet 92 are arranged near the end portions of the side wall 42, that is, the projection of the air inlet 90 along a direction perpendicular to the longitudinal direction of the shell 10 is completely offset from the projection of the air passage hole 53 along a direction perpendicular to the longitudinal direction of the shell 10. Moreover, the air outlet end of the air passage hole 53 and the air outlet ends of the first air inlet 91 and the second air inlet 92 are all arranged higher than the surrounding plane, so that the condensate formed by the aerosol in the atomization cavity 23 or the leaked liquid substrate is difficult to directly enter the air inlet 90 through the air passage hole 53, preventing liquid from leaking outside the atomizer 100.

[0047] Further, the projection area of the main body 52 on the bottom cover 40 along the longitudinal direction of the shell 10 is greater than the projection area of the atomization surface 212 on the bottom cover 40 along the longitudinal direction of the shell 10. The two ends of the main body 52 are connected to the support part 51 through two partition plates 54, respectively. Due to the protruding arrangement of the two sides of the support part 51, the partition plates 54 are arranged obliquely, and a plurality of drainage openings 55 are formed between adjacent partition plates 54 and between the inner wall surface of the support part 51 and the partition plates 54. The two end surfaces of the main body 52 are provided with inclined surfaces, which facilitate the liquid on the main body 52 to enter the drainage openings 55. Part of the wall surface of the partition plate 54 of the partition 50 is arranged in abutment with the inner wall surface of the bottom cover 40, and the first liquid collection area 561 is formed between the partition plates 54. At the same time, the area between the partition 50 and the base 41 of the bottom cover 40 forms the second liquid collection area 562. Along the longitudinal direction of the shell 10, the partition plates 54 on both sides of the partition 50 are opposite to the gas outlet channels 14 on both sides of the shell 10, and the condensed liquid or part of the liquid matrix formed in the gas outlet channels 14 can be affected by gravity and enter the partition plates 54 or the drainage openings 55 on both sides of the partition 50, and then enter the first liquid collection area 561 or the second liquid collection area 562, thereby greatly improving the leakage-proof performance of the entire atomizer 100.

[0048] Further, since the liquid storage cavity 16 is basically a sealed cavity, except that the liquid matrix can enter the atomization assembly 20 through the opening 171. As the liquid matrix inside the liquid storage cavity 16 is consumed, the proportion of space occupied by the gas increases, thereby generating negative pressure, causing the liquid matrix to fail to smoothly enter the atomization assembly 20 from the opening 171.

[0049] Based on the above reasons, the application provides an embodiment of an atomization assembly, which comprises a porous body 21 and a heating element 22. An air passage 80 is arranged on the porous body 21, one end of the air passage 80 is connected to an atomization cavity 23, and the other end is connected to a liquid storage cavity 16. Since the atomization cavity 23 is in communication with an air inlet 90, when a negative pressure is formed inside the liquid storage cavity 16, air can be supplied through the air passage 80, so that the liquid guiding is smooth. Specifically, a first section 801 of the air passage 80 is located on a liquid absorbing surface 211 of the porous body 21, the first section 801 extends on the liquid absorbing surface 211 to form a terminal end 8011, a sealing member 30 covers part of the liquid absorbing surface 211, but does not cover the terminal end 8011 of the first section 801, so that the terminal end 802 of the first section 801 is in a fluid communication state with the liquid storage cavity 16. A second section 802 of the air passage 80 is located on at least one side surface 24 of the porous body 21, one end of the second section 802 is in communication with the first section 801, and the second section 802 extends on the side surface 24 and can extend to the atomization surface 212. Since at least part of the outer surface of the side surface 24 is covered by the sealing member 30, the second section 802 of the air passage 80 extends as much as possible in the longitudinal direction, so that the other end of the second section 802 is at least partially uncovered by the sealing member 30 and is in fluid communication with the atomization cavity 23, so as to facilitate the air in the atomization cavity 23 to enter the air passage 80. Since the air passage 80 is defined by the groove formed on the surface of the porous body 21 and extends on at least two surfaces of the porous body 21, the first section 801 is connected to the liquid storage cavity 16, and the second section 802 is connected to the external air through the atomization cavity 23, even if the sealing member 30 on the surface of the porous body 21 is tightly attached to the outer surface of the porous body 21, the air passage 80 will not be closed and will not hinder the air flow into the liquid storage cavity 16. On the other hand, the air outlet end of the air passage 80, i.e., the terminal end 802 of the first section 801, is located on the liquid absorbing surface 211 and is close to the atomization surface 212, so that even if the liquid matrix has a large viscosity or flows slowly, the liquid matrix in the air passage 80 can be continuously transferred to the atomization surface 212 for atomization, and the air flow into the liquid storage cavity 16 will not be affected. Alternatively, when the relative position relationship between the liquid absorbing surface 211 and the atomization surface 212 of the porous body 21 changes, the air passage 80 can extend longitudinally on one of the side surfaces 24 of the porous body 21 and be connected to the liquid absorbing surface 211, that is, only one end of the air passage 80 on the surface of the porous body 21 needs to be in fluid communication with the liquid storage cavity 16, and the other end needs to be in communication with the external air flow.

[0050] In the preferred embodiments provided in the present application, the ventilation groove 80 includes a first ventilation groove 81 and a second ventilation groove 82 which are separated from each other, and the first ventilation groove 81 is arranged opposite to the second ventilation groove 82 and is symmetric about the center of the porous body 21. Specifically, the second section 812 of the first ventilation groove 81 and the second section 822 of the second ventilation groove 82 are arranged on the opposite two side surfaces 24 of the porous body 21, respectively. The second section 812 of the first ventilation groove 81 and the first section 822 of the second ventilation groove 82 are arranged in parallel and longitudinally extend to communicate the atomization surface 212 and the liquid suction surface 211. The first section 811 of the first ventilation groove 81 is arranged on the liquid suction surface 211, extends from the two sides of the air outlet end of the second section 812 along the length direction of the liquid suction surface 211 to form an intermediate section 813, and then extends along the width direction of the liquid suction surface 211 for a certain length to form the first section 811. Symmetrically, the first section 821 of the second ventilation groove 82 is arranged on the other side of the liquid suction surface 211. Specifically, the first section 821 of the second ventilation groove 82 is formed by extending from the two sides of the air outlet end of the second section 822 along the length direction of the liquid suction surface 211 to form an intermediate section 823, and then extending along the width direction of the liquid suction surface 211 for a certain length. That is, the air outlet end of the second section 812 of the first ventilation groove 81 is divided into two first sections 811, and the air outlet end of the second section 822 of the second ventilation groove 82 is divided into two first sections 821, so that four ventilation grooves 80 are formed on the entire liquid suction surface 211 to communicate with the liquid storage cavity 16, which can greatly improve the ventilation volume. Further, the width or depth of the first section 811 of the first ventilation groove 81 is greater than that of the second section 812, and the width or depth of the first section 821 of the second ventilation groove 82 is greater than that of the second section 823, so that the air supplement is smooth. The ventilation grooves 80 are arranged on the multiple side surfaces 24 and the liquid suction surface 211 of the porous body 21, and when the sealing member 30 excessively affects the ventilation capacity of one or part of the ventilation grooves 80, the ventilation capacity of the other ventilation grooves 80 is not affected, and the ventilation capacity of the entire liquid storage cavity 16 of the atomizer 100 is not affected. Understandably, the design of the ventilation grooves 80 on each surface of the porous body 21 can be designed according to the demand of the ventilation volume of the specific atomizer. When the ventilation volume needs to be increased, several ventilation grooves 80 can be arranged on the liquid suction surface 211, and when only a small amount of ventilation volume is needed, only the ventilation grooves 80 need to be arranged on the liquid suction surface 211.

[0051] The embodiments provided in the present application provide the implementation of the ventilation groove 80 of the block-shaped porous body 21. When the shape of the porous body 21 changes, the path shape of the ventilation groove 80 also changes, and only the ventilation groove 80 needs to be ensured to communicate the atomization cavity 23 and the liquid storage cavity 16. A communication through groove can also be arranged between the atomization surface 212 and the liquid suction surface 211 to form the ventilation groove 80. In order to avoid liquid leakage, the width of the ventilation groove 80 is small, and multiple ventilation grooves 80 can be designed to meet the demand of the ventilation volume.

[0052] It has to be noted that the application relates to all possible technical equivalents, which are within the scope of the application, but are not described in greater detail in the present application.

Claims

1. An atomizer characterized by, The atomizer comprises: a housing, a liquid storage cavity formed in the housing for storing a liquid medium; an atomization assembly for atomizing the liquid medium to form an aerosol, the atomization assembly comprising a heating element and a porous body for delivering the liquid medium, the porous body having a liquid absorbing surface in fluid communication with the liquid storage cavity and an atomization surface for carrying the heating element; a seal, at least a portion of the seal surrounding the porous body; wherein a surface of the porous body is recessed to form at least one air passage, at least a portion of the air passage extending from the liquid absorbing surface towards the atomization surface, the seal and the air passage defining an air flow path for air to enter the liquid storage cavity; wherein the air passage comprises a first section extending on the liquid absorbing surface; the porous body comprises a plurality of side surfaces connected between the liquid absorbing surface and the atomization surface, the air passage comprises a second section extending on the side surfaces, the second section being in communication with the first section; the first section extends on the liquid absorbing surface to form a terminal end, the seal covers a portion of the liquid absorbing surface and does not cover the terminal end. the first section is split on the liquid absorbing surface to form two grooves in communication with the first section.

2. The atomizer of claim 1, wherein, the seal covers at least a portion of the side surfaces and does not completely cover the second section.

3. The atomizer of claim 1, wherein, the second section starts from the liquid absorbing surface and ends at the atomization surface.

4. The atomizer of claim 1, wherein, a depth of the first section is greater than a depth of the second section, or a width of the first section is greater than a width of the second section.

5. The atomizer of claim 1, wherein, the air passage further comprises a connecting section on the liquid absorbing surface; the connecting section connects the first section and the second section.

6. The atomizer of claim 1, wherein, the connecting section extends at least partially along a length direction of the liquid absorbing surface, and the first section extends at least partially along a width direction of the liquid absorbing surface.

7. The atomizer of claim 6, wherein, the air passage comprises a first air passage and a second air passage formed on the surface of the porous body and separated from each other.

8. The atomizer of claim 1, wherein, the first air passage and the second air passage are centrally symmetrical on the porous body.

9. The atomizer of claim 8, wherein, The atomizer further comprises a bottom cover fixedly connected to one end of the housing, and a partition arranged between the atomization assembly and the bottom cover; the partition and the atomization assembly define a forming atomization cavity, and the partition and the bottom cover define at least one liquid storage area.

10. The atomizer of claim 1, wherein, The partition is provided with at least one liquid guide opening for communicating the atomization cavity and the liquid storage area.

11. The atomizer of claim 10, wherein, The housing is further provided with an air outlet channel for outputting the aerosol; the air outlet channel extends longitudinally along the housing and is in fluid communication with the liquid guide opening.

12. The atomizer of claim 11, wherein, The liquid storage cavity has an opening for communicating the liquid absorbing surface and the liquid storage cavity, and a projection of the opening on the liquid absorbing surface is smaller than an area of the liquid absorbing surface.

13. The atomizer of claim 1, wherein, The atomizer comprises:

14. An aerosol-generating device comprising: a housing, a liquid storage cavity formed in the housing for storing a liquid medium; an atomization assembly for atomizing the liquid medium to form an aerosol, the atomization assembly comprising a heating element and a porous body for delivering the liquid medium, the porous body having a liquid absorbing surface in fluid communication with the liquid storage cavity and an atomization surface for carrying the heating element; a seal, at least a portion of the seal surrounding the porous body; wherein a surface of the porous body is recessed to form at least one air passage, at least a portion of the air passage extending from the liquid absorbing surface towards the atomization surface, the seal and the air passage defining an air flow path for air to enter the liquid storage cavity; wherein the air passage comprises a first section extending on the liquid absorbing surface; the porous body comprises a plurality of side surfaces connected between the liquid absorbing surface and the atomization surface, the air passage comprises a second section extending on the side surfaces, the second section being in communication with the first section; the first section extends on the liquid absorbing surface to form a terminal end, the seal covers a portion of the liquid absorbing surface and does not cover the terminal end. the first section is split on the liquid absorbing surface to form two grooves in communication with the first section. the seal covers at least a portion of the side surfaces and does not completely cover the second section. the second section starts from the liquid absorbing surface and ends at the atomization surface. a depth of the first section is greater than a depth of the second section, or a width of the first section is greater than a width of the second section. the air passage further comprises a connecting section on the liquid absorbing surface; the connecting section connects the first section and the second section. the connecting section extends at least partially along a length direction of the liquid absorbing surface, and the first section extends at least partially along a width direction of the liquid absorbing surface. the air passage comprises a first air passage and a second air passage formed on the surface of the porous body and separated from each other. the first air passage and the second air passage are centrally symmetrical on the porous body. The atomizer further comprises a bottom cover fixedly connected to one end of the housing, and a partition arranged between the atomization assembly and the bottom cover; the partition and the atomization assembly define a forming atomization cavity, and the partition and the bottom cover define at least one liquid storage area. The partition is provided with at least one liquid guide opening for communicating the atomization cavity and the liquid storage area. The housing is further provided with an air outlet channel for outputting the aerosol; the air outlet channel extends longitudinally along the housing and is in fluid communication with the liquid guide opening. The liquid storage cavity has an opening for communicating the liquid absorbing surface and the liquid storage cavity, and a projection of the opening on the liquid absorbing surface is smaller than an area of the liquid absorbing surface. The atomizer comprises: a housing, a liquid storage cavity formed in the housing for storing a liquid medium; an atomization assembly for atomizing the liquid medium to form an aerosol, the atomization assembly comprising a heating element and a porous body for delivering the liquid medium, the porous body having a liquid absorbing surface in fluid communication with the liquid storage cavity and an atomization surface for carrying the heating element; a seal, at least a portion of the seal surrounding the porous body; wherein a surface of the porous body is recessed to form at least one air passage, at least a portion of the air passage extending from the liquid absorbing surface towards the atomization surface, the seal and the air passage defining an air flow path for air to enter the liquid storage cavity; wherein the air passage comprises a first section extending on the liquid absorbing surface; the porous body comprises a plurality of side surfaces connected between the liquid absorbing surface and the atomization surface, the air passage comprises a second section extending on the side surfaces, the second section being in communication with the first section; the first section extends on the liquid absorbing surface to form a terminal end, the seal covers a portion of the liquid absorbing surface and does not cover the terminal end. the first section is split on the liquid absorbing surface to form two grooves in communication with the first section. the seal covers at least a portion of the side surfaces and does not completely cover the second section. the second section starts from the liquid absorbing surface and ends at the atomization surface. a depth of the first section is greater than a depth of the second section, or a width of the first section is greater than a width of the second section. the air passage further comprises a connecting section on the liquid absorbing surface; the connecting section connects the first section and the second section. the connecting section extends at least partially along a length direction of the liquid absorbing surface, and the first section extends at least partially along a width direction of the liquid absorbing surface. the air passage comprises a first air passage and a second air passage formed on the surface of the porous body and separated from each other. the first air passage and the second air passage are centrally symmetrical on the porous body. The atomizer further comprises a bottom cover fixedly connected to one end of the housing, and a partition arranged between the atomization assembly and the bottom cover; the partition and the atomization assembly define a forming atomization cavity, and the partition and the bottom cover define at least one liquid storage area. The partition is provided with at least one liquid guide opening for communicating the atomization cavity and the liquid storage area. The housing is further provided with an air outlet channel for outputting the aerosol; the air outlet channel extends longitudinally along the housing and is in fluid communication with the liquid guide opening. The liquid storage cavity has an opening for communicating the liquid absorbing surface and the liquid storage cavity, and a projection of the opening on the liquid absorbing surface is smaller than an area of the liquid absorbing surface. The atomizer comprises:

15. An atomising assembly for use in atomising a liquid substrate to form an aerosol, characterised in that, The atomization assembly comprises a heating element and a porous body for delivering a liquid substrate, the porous body having a liquid absorbing surface in fluid communication with a liquid storage cavity, an atomization surface for carrying the heating element, and a plurality of side surfaces connected between the liquid absorbing surface and the atomization surface; wherein a surface of the porous body is recessed to form at least one air passage, the air passage comprising a first section extending on the liquid absorbing surface and a second section extending on the side surfaces from the liquid absorbing surface towards the atomization surface, the second section being in communication with the first section. The second section starts from the liquid absorbing surface and ends at the atomization surface.

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