Electronic atomization device and its power supply device

Abstract

The present invention relates to an electronic atomization device and its power supply device. The power supply device includes a housing, at least one air inlet hole is provided on the housing, and a muffling cavity is formed inside the housing, and a plurality of micropores connecting the at least one air inlet hole and the muffling cavity. When external air enters through the air inlet hole and then flows into the micropores, the high acoustic resistance characteristic of the micropores is utilized to achieve the effect of muffling, thereby reducing noise; the airflow flowing into the micropores then flows into the muffling cavity for mixing, which can reduce the flow velocity of the airflow, thereby further reducing noise.

Description

Technical Field

[0001] The present invention relates to the field of atomization, and more particularly to an electronic atomization device and its power supply device. Background Art

[0002] The electronic atomization devices in the prior art mainly consist of an atomizer and a power supply device. The power supply device is used to supply power to the atomizer. The atomizer can heat and atomize the liquid atomization matrix stored therein after being powered on to generate atomized gas for users to inhale. During suction, there is a problem of suction noise generated by the airflow in the intake airway of the atomizer. The faster the suction speed, the greater the noise. Therefore, how to reduce the suction noise and improve the user experience is an urgent problem to be solved. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an improved power supply device and an electronic atomization device having the power supply device in view of the above-mentioned defects of the prior art.

[0004] The technical solution adopted by the present invention to solve its technical problems is to construct a power supply device, including a housing, at least one intake hole is provided on the housing, a sound absorption cavity is formed inside the housing, and a plurality of micropores connecting the at least one intake hole and the sound absorption cavity are provided.

[0005] In some embodiments, the diameter of the micropores is 0.3 - 1 mm.

[0006] In some embodiments, the minimum cross-sectional area of the sound absorption cavity is greater than the total intake area of the plurality of micropores.

[0007] In some embodiments, the plurality of micropores include at least two first micropores and at least two second micropores respectively located on two opposite sides of the sound absorption cavity.

[0008] In some embodiments, the number of the first micropores is the same as or different from the number of the second micropores.

[0009] In some embodiments, the total intake area of the at least two first micropores is the same as the total intake area of the at least two second micropores.

[0010] In some embodiments, the projections of the at least two first micropores and the at least two second micropores along the intake direction at least partially overlap.

[0011] In some embodiments, there are two intake holes, and the two intake holes are respectively provided on two opposite sides of the housing.

[0012] In some embodiments, the first micropores and the second micropores are respectively located on the other two opposite sides of the housing.

[0013] In some embodiments, the two air inlets, the at least two first micro-holes, and the at least two second micro-holes are arranged staggeredly along the circumferential direction of the housing.

[0014] In some embodiments, the power supply device further includes an air flow sensor disposed in the housing, and an induction channel communicating the air flow sensor with the sound absorption cavity is further formed in the housing.

[0015] In some embodiments, the air inlet end of the induction channel is located on the side where the sound absorption cavity communicates with the micro-holes.

[0016] In some embodiments, the air inlet end of the induction channel extends into the sound absorption cavity, and the air inlet of the air inlet end of the induction channel is higher than the bottom surface of the sound absorption cavity.

[0017] In some embodiments, the power supply device further includes a bracket disposed in the housing, the sound absorption cavity is formed by the downward depression of the top surface of the bracket, and the plurality of micro-holes are respectively formed on two opposite sides of the bracket.

[0018] In some embodiments, an air passage communicating the at least one air inlet hole and the plurality of micro-holes is further formed in the housing.

[0019] In some embodiments, the air passage is annular.

[0020] In some embodiments, the air passage is formed by the inward depression of the outer surface of the bracket, and the plurality of micro-holes are formed by the inward depression of the inner surface of the air passage.

[0021] In some embodiments, the power supply device further includes a seal disposed between the outer surface of the bracket and the inner surface of the housing in a sealed manner.

[0022] The present invention further provides an electronic atomization device, including the power supply device according to any one of the above and an atomizer electrically connected to the power supply device.

[0023] In some embodiments, a gas guiding channel, an atomization cavity, and an air outlet channel are sequentially formed and communicated in the atomizer; the gas guiding channel is communicated with the sound absorption cavity.

[0024] Implementing the present invention has at least the following beneficial effects: The outside air enters through the air inlet hole and then flows into the micro-holes, and the high sound resistance characteristic of the micro-holes is used to achieve the sound absorption effect, thereby reducing noise; the air flow flowing into the micro-holes then flows into the sound absorption cavity to be mixed, which can reduce the flow rate of the air flow, thereby further reducing noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below in conjunction with the drawings and embodiments. In the drawings:

[0026] Figure 1 It is a schematic three-dimensional structure diagram of the electronic atomization device in the first embodiment of the present invention;

[0027] Figure 2 is Figure 1 a schematic exploded structure diagram of the electronic atomization device shown;

[0028] Figure 3 is Figure 1 a schematic longitudinal sectional structure diagram of the electronic atomization device shown;

[0029] Figure 4 is Figure 2 a schematic exploded structure diagram of the atomizer in;

[0030] Figure 5 is Figure 2 a schematic exploded structure diagram of the power supply device in;

[0031] Figure 6 is a schematic longitudinal sectional structure diagram of the power supply device in 2 when the housing is hidden;

[0032] Figure 7 is a schematic transverse sectional structure diagram of the power supply device in 2;

[0033] Figure 8 is a noise distribution diagram at the bottom of the atomizer;

[0034] Figure 9 is a vibration streamline distribution diagram at the bottom of the atomizer;

[0035] Figure 10 is a schematic three-dimensional structure diagram of the power supply device when the housing is hidden in the second embodiment of the present invention;

[0036] Figure 11 is when the electronic atomization device adopts Figure 10 a noise distribution diagram at the bottom of the atomizer of the power supply device shown;

[0037] Figure 12 is when the electronic atomization device adopts Figure 10 a vibration streamline distribution diagram at the bottom of the atomizer of the power supply device shown;

[0038] Figure 13 is a schematic three-dimensional structure diagram of the power supply device when the housing is hidden in the third embodiment of the present invention;

[0039] Figure 14 is when the electronic atomization device adopts Figure 13 a noise distribution diagram at the bottom of the atomizer of the power supply device shown;

[0040] Figure 15 is when the electronic atomization device adopts Figure 13The vibration streamline distribution diagram at the bottom of the atomizer of the power supply device shown. Detailed implementation manners

[0041] For a clearer understanding of the technical features, objectives, and effects of the present invention, the detailed implementation manners of the present invention will now be described with reference to the accompanying drawings. Many specific details are set forth in the following description in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship in which the product of the present invention is usually placed during use. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0043] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0044] In the present invention, unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0046] Figure 1 shows an electronic atomization device 1 in the first embodiment of the present invention. The electronic atomization device 1 can be used to inhale aerosol. In some embodiments, it can be in an elliptical column shape. It may include a power supply device 10 and an atomizer 20 detachably disposed above the power supply device 10 along the longitudinal direction. The atomizer 20 is used to accommodate a liquid matrix and heat and atomize the liquid matrix to generate aerosol, and the power supply device 10 is used to supply power to the atomizer 20. It can be understood that the electronic atomization device 1 is not limited to an elliptical column shape, and it can also be in a cylindrical shape, a square column shape, a flat column shape or other shapes, and the atomizer 20 and the power supply device 10 can also be connected together in a non-detachable manner.

[0047] As Figures 2 - 3 shows, in some embodiments, the atomizer 20 may include a housing 21, a base assembly 22, a heating assembly 23, an atomization seat 24 and an atomization sleeve 25. The housing 21 is used to accommodate the base assembly 22, the heating assembly 23, the atomization seat 24 and the atomization sleeve 25. A liquid storage cavity 210 for storing the liquid matrix and an air outlet channel 2110 for outputting the aerosol can be formed therein.

[0048] The housing 21 is generally in an elliptical cylindrical shape. An air outlet pipe 211 can be longitudinally disposed in the housing 21. The air outlet pipe 211 is connected to the inner side of the top wall of the housing 21 and can be coaxially disposed with the housing 21. An annular liquid storage cavity 210 is defined between the inner wall surface of the housing 21 and the outer wall surface of the air outlet pipe 211, and the inner wall surface of the air outlet pipe 211 defines the air outlet channel 2110. In this embodiment, the air outlet pipe 211 and the housing 21 are integrally formed, for example, they can be integrally formed by injection molding. In other embodiments, the air outlet pipe 211 and the housing 21 can also be formed separately and then assembled together.

[0049] The heating component 23 is received in the space formed between the base component 22 and the atomization base 24. In some embodiments, it may include a liquid absorber 231 for sucking the liquid matrix from the liquid storage cavity 210, a heating element for heating and atomizing the liquid matrix adsorbed in the liquid absorber 231 after being energized and heated, two electrode leads 232 electrically connected to the heating element, and a sealing sleeve 233 sleeved on the liquid absorber 231. The liquid absorber 231 may be a sintered porous body in some embodiments and may be made of hard capillary structures such as porous ceramics, porous glass ceramics, and porous glass. The liquid absorber 231 is supported on the base component 22, and there is a certain gap between the bottom surface of the liquid absorber 231 and the base component 22. This gap forms an atomization cavity 230 for realizing the mixing of the aerosol and air. The sealing sleeve 233 is sleeved on the upper part of the liquid absorber 231 and may be made of an elastic material such as silica gel, which can play the role of carrying the liquid absorber 231 and ensuring airtightness.

[0050] The atomization base 24 is sleeved on the heating component 23 and may be made of plastic. An air outlet hole 240 communicating the atomization cavity 230 with the air outlet channel 2110 and at least one liquid inlet hole 241 for guiding and communicating the liquid storage cavity 210 with the liquid absorber 231 are formed on the atomization base 24. In this embodiment, the air outlet hole 240 may be formed by extending downward from the middle of the top surface of the atomization base 24, and the lower end of the air outlet pipe 211 may be inserted into the air outlet hole 240. There are two liquid inlet holes 241 and they may be formed by extending downward from the top surface of the atomization base 24. The two liquid inlet holes 241 may be respectively located on both sides of the air outlet hole 240 along the length direction.

[0051] In some embodiments, at least one ventilation channel 245 may be formed on the atomizing base 24, and the at least one ventilation channel 245 communicates with the outside and the liquid storage cavity 210. When the air pressure in the liquid storage cavity 210 is too low, outside air can enter the liquid storage cavity 210 through the ventilation channel 245, thereby increasing the air pressure in the liquid storage cavity 210 to avoid the situation of poor liquid flow due to too low air pressure in the liquid storage cavity 210 and prevent dry burning. In this embodiment, there are two ventilation channels 245, and the two ventilation channels 245 are respectively formed on both sides of the atomizing base 24 along the length direction. Each ventilation channel 245 includes a first ventilation groove 242 extending longitudinally and a second ventilation groove 243 extending circumferentially. The first ventilation groove 242 can extend longitudinally downward from the outer side of the top of the atomizing base 24 to communicate with the second ventilation groove 243. The second ventilation groove 243 can be formed by inward depression of the outer peripheral surface of the atomizing base 24, and there can be multiple second ventilation grooves 243, and the multiple second ventilation grooves 243 can be arranged in parallel at intervals. The ventilation channel 245 may further include a third ventilation groove 244 connecting the multiple second ventilation grooves 243. The first ventilation groove 242, the second ventilation groove 243, and the third ventilation groove 244 can all be composed of thin grooves, which can make the ventilation channel 245 not obstruct the flow of gas, but can obstruct the flow of the liquid matrix, ensuring that the ventilation channel 245 has the function of ventilation and liquid blocking, and reducing the possibility of the atomizing matrix in the liquid storage cavity 210 leaking through the ventilation channel 245. In addition, the ventilation channel 245 also has a certain liquid storage function and can store a certain amount of condensate. Preferably, the first ventilation groove 242, the second ventilation groove 243, and the third ventilation groove 244 can all be composed of capillary grooves that can generate capillary force, and the condensate in the ventilation channel 245 can flow back to the liquid storage cavity 210 through the capillary force. In some embodiments, the cross-sectional area range of the first ventilation groove 242, the second ventilation groove 243, and the third ventilation groove 244 can be less than or equal to 1mm 2 , preferably less than or equal to 0.1mm 2 .

[0052] The atomizing sleeve 25 is sleeved on the atomizing base 24, and it can be made of an elastic material such as silica gel, and is used to seal the liquid storage cavity 210, which can prevent the liquid matrix in the liquid storage cavity 210 from leaking through the outer peripheral surface of the atomizing base 24 and prevent the liquid matrix in the liquid storage cavity 210 from leaking into the air outlet channel 2110.

[0053] In some embodiments, the base assembly 22 may include a base 221, an electrode post 222, a liquid absorption cotton 223, a shunt mesh 224, and a limiting member 225.

[0054] The base 221 is embedded in the lower opening of the housing 21 and can be snap-connected to the housing 21. The base 221 may include a base body 2213, a first support arm 2214 erected on the top surface of the base body 2213, and a second support arm 2215 erected on the top surface of the base body 2213 and disposed opposite to the first support arm 2214. The liquid absorber 231 is supported between the first support arm 2214 and the second support arm 2215. The base body 2213 is generally in the shape of an oval thin plate, and the atomizer 20 can be supported on the bracket 12 of the power supply device 10 via the base body 2213. The base body 2213 has a mating surface 2216 that contacts and mates with the bracket 12. In this embodiment, the mating surface 2216 is formed by the bottom outer peripheral surface of the base body 2213 and can be arc-shaped. At least one air guide hole 2210 communicating the atomization chamber 230 with the outside can be formed longitudinally on the base body 2213. In this embodiment, there are two air guide holes 2210. A circular ring-shaped air flow groove 2212 can be concavely formed in the middle of the bottom surface of the base body 2213. A protruding portion 2211 is formed in the middle of the air flow groove 2212. The two air guide holes 2210 can be formed by extending upward from the groove bottom surface of the air flow groove 2212 and can be respectively located on the radial two sides of the protruding portion 2211.

[0055] The electrode posts 222 can be longitudinally penetrated through the base body 2213. There can be two electrode posts 222, and the two electrode posts 222 are respectively electrically connected to the two electrode leads 232. The two electrode posts 222, the two air guide holes 2210, and the protruding portion 2211 can be located in the length direction of the base body 2213.

[0056] The absorbent cotton 223 is arranged on the base body 2213 and is used to absorb the condensate stored in the base body 2213, thereby further preventing the leakage of the condensate, further avoiding the influence of the liquid leakage on the performance of the power supply device 10, and improving the user experience.

[0057] The shunt net 224 can be arranged on the absorbent cotton 223 and can be made of a metal material such as stainless steel. A plurality of mesh holes 2240 are distributed on the shunt net 224. The plurality of mesh holes 2240 are located between the liquid absorber 231 and the base body 2213 and connect the atomization chamber 230 and the two air guide holes 2210. Herein, the air flow groove 2212, the air guide holes 2210, and the mesh holes 2240 are connected in sequence from bottom to top to form an air guide channel for external air to flow into the atomization chamber 230. Since the aperture of the mesh holes 2240 is small, a liquid film can be formed on each mesh hole 2240 for the liquid matrix, thereby preventing the leakage of the liquid matrix. In addition, even if a part of the liquid matrix leaks out from the shunt net 224, it can flow to the absorbent cotton 223 and be absorbed by the absorbent cotton 223.

[0058] The limiting member 225 is received between the first support arm 2214 and the second support arm 2215. It can be made of an elastic material such as silica gel and is used to press and fix the shunt mesh 224 and the absorbent cotton 223 on the seat body 2213.

[0059] In some embodiments, the atomizer 20 may further include a mouthpiece plug 26 detachably disposed at the air outlet of the air outlet passage 2110. The mouthpiece plug 26 can be made of an elastic material such as silica gel and is detachably plugged at the air outlet of the air outlet passage 2110. When the atomizer 20 is not in use, the mouthpiece plug 26 can be inserted to seal and block the upper air outlet of the air outlet passage 2110, which can prevent foreign objects from entering the atomizer 20 and also prevent the liquid matrix from leaking out from the air outlet. When in need of use, just pull out the mouthpiece plug 26.

[0060] As Figure 3 and Figures 5 - 7 As shown, in some embodiments, the power supply device 10 may include a housing 11 and a bracket 12, an elastic electrode 13, a battery 14, an air flow sensor 15 and a circuit board 16 received in the housing 11. The elastic electrode 13, the battery 14 and the air flow sensor 15 are electrically connected to the circuit board 16 respectively. When the user sucks, the air flow sensor 15 senses the air flow passing through, and the circuit board 16 controls the battery 14 to supply power to the heating component 23 of the atomizer 20.

[0061] The housing 11 is generally in an elliptical cylindrical shape. An accommodation cavity 111 for accommodating the atomizer 20 is formed in the upper part of the housing 11. The bracket 12 can be received in the lower part of the housing 11 and may include a support portion 125 located in the upper part and a main body portion 126 located in the lower part. The battery 14, the air flow sensor 15 and the circuit board 16 can all be installed on the main body portion 126. Among them, the battery 14 can be installed at the lower part of the main body portion 126, and the air flow sensor 15 and the circuit board 16 can be installed at the upper part of the main body portion 126. The elastic electrode 13 can be inserted into the support portion 125. Generally, there are two elastic electrodes 13. After the atomizer 20 is inserted into the accommodation cavity 111 and supported on the support portion 125, the two elastic electrodes 13 are respectively in contact conduction with the two electrode posts 222. In some embodiments, the power supply device 10 may further include a magnetic attraction member 17 embedded on the support portion 125 for magnetically connecting with the atomizer 20. In this embodiment, there are two magnetic attraction members 17, and the two magnetic attraction members 17 can be in a circular ring shape and respectively sleeved on the two elastic electrodes 13.

[0062] At least one air inlet hole 110 communicating with the outside is formed on the housing 11. An air passing channel 122, micropores 121, and a sound absorption cavity 120 that are successively communicated with the at least one air inlet hole 110 may be formed inside the housing 11. The air inlet hole 110, the air passing channel 122, the micropores 121, and the sound absorption cavity 120 are successively communicated to form an air inlet channel for outside air to flow into the atomizer 20. After the outside air enters from the air inlet hole 110, it flows into the micropores 121 through the air passing channel 122, mixes in the sound absorption cavity 120, then flows into the air guide hole 2210, and then flows into the atomization cavity 230. Since the aperture and the intake area of the micropores 121 are small, for example, the aperture is less than 1 mm, the high sound resistance characteristic of the micropores 121 is utilized to achieve the sound absorption effect, thereby reducing noise.

[0063] In this embodiment, there are two air inlet holes 110, which may be respectively formed on the two side walls of the housing 11 along the length direction. The air passing channel 122 is a circumferential air flow channel, which can reduce the noise of the air flow. Specifically, the air passing channel 122 may be formed by the inner concave of the outer peripheral surface of the support portion 125. There are multiple micropores 121, and the diameter range of each micropore 121 may be between 0.3 - 1.0 mm, which can achieve a better noise reduction effect and ensure smooth air intake at the same time. The multiple micropores 121 may extend transversely and may be formed on the support portion 125, and they may be formed by the inner concave of the inner surface of the air passing channel 122.

[0064] In some embodiments, the multiple micropores 121 may include at least one first micropore 1211 and at least one second micropore 1212 respectively formed on two opposite sides of the support portion 125. The first micropore 1211, the second micropore 1212, and the air inlet hole 110 may be arranged staggeredly along the circumferential direction of the housing 11. Preferably, there are multiple first micropores 1211 and multiple second micropores 1212, and the number of the first micropores 1211 and the second micropores 1212 may be the same or different. Further, the total intake area of the multiple first micropores 1211 is the same as the total intake area of the second micropores 1212, which is beneficial to reducing noise. In this embodiment, there are two first micropores 1211 and three second micropores 1212, and the first micropores 1211 and the second micropores 1212 are respectively formed on two sides of the bracket 12 along the width direction. Further, the projections of the two first micropores 1211 and the three second micropores 1212 in the transverse direction, that is, along the air intake direction, at least partially overlap, which can further improve the noise reduction effect.

[0065] The sound absorption cavity 120 can be formed by the downward depression of the top surface of the support portion 125, and the central axis of the sound absorption cavity 120 can coincide with the central axis of the support portion 125. The two airflows entering the sound absorption cavity 120 through the first micropores 1211 and the second micropores 1212 are mixed in the sound absorption cavity 120, which can reduce the flow rate of the airflows, thereby further reducing noise. Among them, the larger the volume of the sound absorption cavity 120, the better the sound absorption effect. Preferably, as long as it is ensured that the minimum cross-sectional area A in the sound absorption cavity 120 is larger than the total air intake area of the plurality of micropores 121, the flow rate of the airflows can be reduced to achieve the noise reduction effect. In this embodiment, the cross-section of the sound absorption cavity 120 is in the shape of an arc-shaped curved surface that is large at both ends and small in the middle, and the minimum cross-sectional area A of the sound absorption cavity 120 is located in the middle of its cross-section. The cross-sectional dimension in the middle of the sound absorption cavity 120 is small, which is convenient for leaving enough installation space for the magnetic attraction member 17 and the elastic electrode 13 on both sides of the middle cross-section of the sound absorption cavity 120.

[0066] An induction channel 123 that connects the air intake channel and the airflow sensor 15 is further formed in the housing 11. In this embodiment, the air intake end of the induction channel 123 can extend into the sound absorption cavity 120 and communicate with the sound absorption cavity 120. The air intake port of the air intake end of the induction channel 123 is higher than the bottom surface of the sound absorption cavity 120. In this way, even if there is liquid leakage into the sound absorption cavity 120, it can be avoided that the liquid leakage further flows to the airflow sensor 15, the circuit board 16, and the battery 14 through the induction channel 123, further improving the liquid leakage prevention effect. Preferably, the air intake end of the induction channel 123 can be located on the side where the sound absorption cavity 120 communicates with the micropores 121, and the air intake port of the induction channel 123 can be arranged close to the micropores 121, so as to ensure the sensitivity of the airflow sensor 15 during operation. Specifically, in this embodiment, the air intake port of the induction channel 123 is arranged close to the second micropore 1212, and the position of the air intake port of the induction channel 123 can be flush with the bottom surface of the second micropore 1212 or slightly lower than the bottom surface of the second micropore 1212.

[0067] In addition, the support portion 125 has a contact surface 1251 that contacts the mating surface 2216 at the bottom of the atomizer 20. The contact surface 1251 matches the shape of the mating surface 2216, thereby increasing the sealing performance and reducing the airflows leaking from the gap between the contact surface 1251 and the mating surface 2216, thereby reducing noise. In this embodiment, the inner peripheral surface at the upper end of the support portion 125 forms the contact surface 1251, and the contact surface 1251 matches the shape of the mating surface 2216 and is both arc-shaped.

[0068] In some embodiments, the power supply device 10 may further include a seal 18 hermetically disposed between the outer surface of the support portion 125 and the inner surface of the housing 11. The seal 18 may be made of an elastic material such as silica gel, and may be in a ring shape and sleeved on the support portion 125. The outer surface of the seal 18 may be in interference fit with the inner surface of the housing 11, and the sealing effect of the seal 18 may be improved by means of the interference fit. An annular seal groove 127 for sleeving the seal 18 may be formed by concave-convex processing on the outer peripheral surface of the support portion 125. The seal groove 127 may be located below the air passing channel 122 and may be disposed close to the air passing channel 122. By providing the seal 18, the air flow entering the air passing channel 122 through the air inlet hole 110 can be prevented from leaking below the seal 18, thereby further reducing the noise. It can be understood that in other embodiments, the seal 18 may also be disposed above the air passing channel 122 and may be disposed close to the air passing channel 122; or, in other embodiments, seals 18 may be provided both above and below the air passing channel 122.

[0069] Figure 10 The power supply device 10a in the second embodiment of the present invention is shown. The main difference from the first embodiment is that the sound absorption cavity 120a in this embodiment is a small sound absorption cavity, and its volume is smaller than that of the sound absorption cavity 120 in the first embodiment. Specifically, the cross-sectional shape of the sound absorption cavity 120a in this embodiment is rectangular, and the cross-sectional area of the sound absorption cavity 120a in the width direction is approximately the same as the minimum cross-sectional area A of the sound absorption cavity 120. In addition, the depth of the sound absorption cavity 120a is less than the depth of the sound absorption cavity 120, and the bottom surface of the sound absorption cavity 120a is flush with the air inlet position of the induction channel 123a.

[0070] Figure 13 The power supply device 10b in the third embodiment of the present invention is shown. The main difference from the first embodiment is that only one large hole 121b is provided on the single-side side wall of the bracket 12b in this embodiment, and the air flow flowing into the air passing channel 122 flows into the sound absorption cavity 120b through the large hole 121b. The large hole 121b has a larger air inlet area than the micro hole 121. Specifically, in this embodiment, the large hole 121b is a rectangular hole.

[0071] Figure 8 , Figure 11 , Figure 14The following are the noise distribution diagrams at the bottom of the atomizer when the electronic atomization device uses power supply device 10, power supply device 10a, and power supply device 10b respectively. It can be seen from these noise distribution diagrams that when using power supply device 10, the noise at the bottom of the atomizer is the smallest, and when using power supply device 10b, the noise at the bottom of the atomizer is the largest. In addition, when using power supply device 10, the area corresponding to the protruding part 2211 at the bottom of the atomizer is a stagnant flow area, where the flow velocity is almost zero and has little impact on the noise. When using power supply device 10 and power supply device 10a, due to the uneven distribution of the number of holes on both sides of the sound absorption cavity, the noise on the side of the air flow groove 2212 at the bottom of the atomizer corresponding to the two first micro-holes 1211 is relatively large. The noise can be further reduced by making the distribution of the number of micro-holes on both sides of the sound absorption cavity uniform, or the aperture of the three second micro-holes 1212 can be made smaller (considering the suction resistance, the aperture of the two first micro-holes 1211 can also be increased simultaneously), so that the total intake area of the three second micro-holes 1212 is equal to the total intake area of the two first micro-holes 1211 on the opposite side, thereby further reducing the noise.

[0072] Figure 9 、 Figure 12 、 Figure 15 The following are the vibration streamline distribution diagrams at the bottom of the atomizer when the electronic atomization device uses power supply device 10, power supply device 10a, and power supply device 10b respectively. It can be seen from these streamline distribution diagrams that the single-sided air intake structure with large holes of power supply device 10b intensifies the vibration of the thin plate structure at the bottom of the atomizer, so it is more likely to generate noise.

[0073] It can be understood that the above technical features can be combined and used arbitrarily without limitation.

[0074] The above embodiments only represent the preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent of the present invention; it should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can also be made, which all belong to the protection scope of the present invention; therefore, all equivalent transformations and modifications made to the scope of the claims of the present invention shall fall within the scope covered by the claims of the present invention.

Claims

1. A power supply device, characterized in that, it includes a housing (11), at least one air inlet hole (110) is provided on the housing (11), a sound absorption cavity (120) is formed in the housing (11), and a plurality of micropores (121) that connect the at least one air inlet hole (110) and the sound absorption cavity (120); the minimum cross-sectional area of the sound absorption cavity (120) is larger than the total air inlet area of the plurality of micropores (121); the power supply device further includes an air flow sensor (15) disposed in the housing (11), and an induction channel (123) that connects the air flow sensor (15) and the sound absorption cavity (120) is further formed in the housing (11).

2. The power supply device according to claim 1, characterized in that, the diameter of the micropores (121) is 0.3 - 1 mm.

3. The power supply device according to claim 1, characterized in that, the plurality of micropores (121) includes at least two first micropores (1211) and at least two second micropores (1212) respectively located on two opposite sides of the sound absorption cavity (120).

4. The power supply device according to claim 3, characterized in that, the number of the first micropores (1211) is the same as or different from the number of the second micropores (1212).

5. The power supply device according to claim 3, characterized in that, the total air inlet area of the at least two first micropores (1211) is the same as the total air inlet area of the at least two second micropores (1212).

6. The power supply device according to claim 3, characterized in that, the projections of the at least two first micropores (1211) and the at least two second micropores (1212) along the air inlet direction at least partially overlap.

7. The power supply device according to claim 3, characterized in that, there are two air inlet holes (110), and the two air inlet holes (110) are respectively arranged on two opposite sides of the housing (11).

8. The power supply device according to claim 7, characterized in that, the first micropores (1211) and the second micropores (1212) are respectively located on the other two opposite sides of the housing (11).

9. The power supply device according to claim 7, characterized in that, the two air inlet holes (110), the at least two first micropores (1211), and the at least two second micropores (1212) are arranged in a circumferentially staggered manner along the housing (11).

10. The power supply device according to claim 1, characterized in that, the air inlet end of the induction channel (123) is located on the side where the sound absorption cavity (120) is connected to the micropores (121).

11. The power supply device according to claim 1, characterized in that, the air inlet end of the induction channel (123) extends into the sound absorption cavity (120), and the air inlet position of the air inlet end of the induction channel (123) is higher than the bottom surface of the sound absorption cavity (120).

12. The power supply device according to any one of claims 1 - 11, characterized in that, The power supply device further includes a bracket (12) disposed in the housing (11), the sound-absorbing cavity (120) is formed by a downward recess on the top surface of the bracket (12), and the plurality of micropores (121) are respectively formed on two opposite sides of the bracket (12).

13. The power supply device according to claim 12, wherein, an air passage (122) communicating the at least one air inlet hole (110) and the plurality of micropores (121) is further formed in the housing (11).

14. The power supply device according to claim 13, wherein, the air passage (122) is annular.

15. The power supply device according to claim 13, wherein, the air passage (122) is formed by an inward recess on the outer surface of the bracket (12), and the plurality of micropores (121) are formed by an inward recess on the inner surface of the air passage (122).

16. The power supply device according to claim 12, wherein, the power supply device further includes a seal (18) hermetically disposed between the outer surface of the bracket (12) and the inner surface of the housing (11).

17. An electronic atomization device, wherein, it includes the power supply device according to any one of claims 1-16 and an atomizer electrically connected to the power supply device.

18. The electronic atomization device according to claim 17, wherein, a gas guide passage, an atomization cavity and an air outlet passage are sequentially formed and communicated in the atomizer; the gas guide passage is communicated with the sound-absorbing cavity.

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