An atomizer

Abstract

The application discloses an atomizer, which comprises an atomizing cup for storing a medicine liquid, the atomizing cup is internally provided with an atomizing assembly, the atomizing cup is provided with a gas pumping port and a mist outlet, the atomizer further comprises a screening element connected to the atomizing cup, the screening element is internally provided with a containing cavity, and the containing cavity is communicated with an inlet and an outlet, the inlet is communicated with the mist outlet, at least one continuous spiral channel extending spirally around an axis of the containing cavity is arranged in the containing cavity, and the continuous spiral channel is communicated with the inlet and the outlet, so that the particle size of aerosol particles is graded under the action of centrifugal force. The continuous spiral channel provides a smooth spiral motion path for the aerosol particles, the centrifugal force screening mechanism is used to improve the particle separation effect, and the wall surface of the continuous spiral channel is smoothly transitioned, the airflow is in a rotational laminar flow state in the channel, and the working noise is obviously reduced.

Description

Technical Field

[0001] This application belongs to the field of medical device technology, specifically relating to a nebulizer. Background Technology

[0002] A nebulizer is a medical device that converts liquid medications into inhalable aerosol particles, widely used in the treatment of respiratory diseases. The particle size distribution of the aerosol particles is a key factor affecting the deposition location of the drug in the respiratory tract and its therapeutic effect. For example, particles with a diameter of 2–5 μm can be effectively deposited in the lower respiratory tract and alveolar region, while particles larger than 8 μm tend to deposit in the upper respiratory tract or oral cavity and cannot exert a therapeutic effect.

[0003] Existing atomizing cups produce a wide range of aerosol particle sizes after atomization. Therefore, some atomizers incorporate a screening mechanism to classify the particles, retaining large particles and allowing particles of the target size to pass. In existing technologies, the screening mechanism uses multiple stacked inclined baffles or fan-shaped blades. As the airflow carries particles upwards, they repeatedly impact the baffle surface. Large particles settle due to inertial impaction, while smaller particles continue to rise, bypassing the gaps between the baffles. This type of screening method is collision-based, relying on direct impact between particles and the solid wall surface for separation.

[0004] However, the collision separation efficiency of particles is significantly affected by fluctuations in airflow velocity. When the pump pressure is unstable, large particles may not be effectively retained due to insufficient kinetic energy, or small particles may excessively settle due to being carried by the airflow and impacting the wall, resulting in uncontrollable screening accuracy. Furthermore, the multi-layered baffle structure generates significant resistance when airflow passes through, accompanied by noticeable airflow disturbance noise, affecting the patient's user experience. Moreover, during the process of the retained and settled large particles of medication flowing back along the wall to the bottom of the cup, the returning droplets easily interact secondary with the rising aerosol airflow, entraining the already generated effective small particles and re-aggregating them into larger particles, reducing the yield of effective aerosol particles and causing medication waste. Summary of the Invention

[0005] This application provides an atomizer to solve the problems of insufficient particle size screening accuracy and significant airflow noise caused by abrupt changes in the airflow channel during the aerosol particle screening process of existing atomizers.

[0006] The technical solution adopted in this application is as follows: A nebulizer includes a nebulizing cup for storing a liquid medicine, an nebulizing component inside the nebulizing cup, a pump port and a mist outlet, and a filter element connected to the nebulizing cup. The filter element has a cavity inside, and an inlet and an outlet communicating with the cavity. The inlet communicates with the mist outlet. At least one continuous spiral channel extending spirally around the axis of the cavity and communicating with the inlet and outlet is provided inside the cavity, so that the aerosol particles can be classified by particle size under the action of centrifugal force.

[0007] The atomizing component includes an air pumping channel and a liquid suction channel. The liquid suction channel has a liquid outlet, which is located on the inner wall of the air pumping channel, so that the liquid collides with the high-speed airflow to form atomized particles.

[0008] The liquid outlet is inclined relative to the radial direction of the pump air channel so that the liquid ejected from the outlet has a tangential velocity component along the circumference of the pump air channel.

[0009] There is one liquid outlet; or, the liquid outlet includes a first liquid outlet and a second liquid outlet disposed opposite to each other on both sides of the pump air channel. The liquid outlet direction of the first liquid outlet and the second liquid outlet is inclined relative to the radial direction of the pump air channel, and the inclination direction of the first liquid outlet and the second liquid outlet is symmetrical about the central axis of the pump air channel, so that the liquid ejected from the first liquid outlet and the second liquid outlet respectively obtains a tangential velocity component along the circumference of the pump air channel and in the same direction.

[0010] The pump air channel includes a first channel and a second channel. The flow cross-sectional area of ​​the second channel is smaller than that of the first channel, and the liquid outlet is located on the inner wall of the second channel.

[0011] The air pump channel and the mist outlet are coaxially arranged, and the air outlet of the air pump channel faces the mist outlet.

[0012] The atomizing cup includes a cup body and a cup core placed inside the cup body. The cup core includes a first body and a second body sleeved outside the first body. At least a portion of the pumping channel is located inside the first body, and a liquid suction channel is formed between the first body and the second body.

[0013] The atomizing cup is also equipped with a flow divider, which is located between the atomizing component and the mist outlet. The flow divider has a flow divider rib facing the atomizing component. The width of the flow divider rib gradually decreases from the side away from the atomizing component to the side closer to the atomizing component, so as to form a flow divider slope on the outer surface of the flow divider rib.

[0014] The inlet and outlet are located at both ends of the screen along the first direction. The screen is also provided with an air inlet facing the second direction, which is perpendicular to the first direction.

[0015] The atomizing cup has a buffer chamber inside that communicates with the air inlet, and the buffer chamber has an exhaust port facing the mist outlet.

[0016] The inner wall of the cavity is provided with at least one guide vane, which extends spirally around the axis of the cavity to form a continuous spiral channel.

[0017] The guide blades form an axial flow channel at the center of the cavity, and a continuous spiral channel surrounds the outside of the axial flow channel.

[0018] The inlet and outlet are arranged on the screening component along the first direction, and the inner wall of the cavity is provided with a flow guiding structure, which is a groove or a rib, and the flow guiding structure extends along the first direction.

[0019] The filter element has a docking part that is inserted into the atomizing cup. The docking part forms a pairing interface. The edge of the pairing interface has a low section and a high section in the circumferential direction. The lower edge of the low section is lower than the lower edge of the high section. There is a guide section between the low section and the high section.

[0020] The filter element is detachably connected to the atomizing cup and is coaxially arranged with the atomizing cup.

[0021] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows: In this application, spirally extending guide blades are provided within the cavity of the screening component, forming at least one continuous spiral channel connecting the inlet and outlet, enabling particle size classification of aerosol particles under centrifugal force. The continuous spiral channel provides a smooth spiral path for the aerosol particles. As the airflow carries the particles forward along the spiral channel, particles of different sizes are subjected to varying centrifugal forces. Larger particles, due to their greater mass and the significant centrifugal force they experience, exhibit greater radial drift during rotation, rapidly migrating to the channel sidewall and impacting for deposition. Ultimately, under gravity, they flow back along the wall into the atomizing cup to re-enter the atomization cycle. Smaller particles, due to their smaller mass and weaker centrifugal force, have limited radial drift and are carried by the airflow to continue moving along the spiral channel and exiting from the outlet. Compared to separation methods based on direct collision, the centrifugal screening mechanism of this application reduces the influence of airflow velocity on particle separation. Even with pressure fluctuations in the pump source, the centrifugal force on larger particles remains much greater than that on smaller particles, maintaining a stable screening threshold and effectively solving the problem of uncontrollable screening accuracy caused by unstable pump pressure. Meanwhile, the smooth transition of the continuous spiral channel wall allows the airflow to rotate in a laminar flow state within the channel, avoiding the severe pressure pulsations caused by repeated impacts of the airflow against the baffles in traditional multi-layer inclined baffle structures, thus significantly reducing operating noise. Because large-diameter aerosol particles are thrown to the sidewalls of the cavity under centrifugal force, a central airflow and spiral flow of small-diameter aerosol particles are formed within the cavity, while large-diameter aerosol particles fall back from the edges. This spatially separates the transport and return of aerosol particles, preventing turbulence caused by large particles settling and dripping randomly, and also preventing large particles from being discharged from the outlet under the influence of the airflow, ensuring effective screening. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1This is a cross-sectional view of an atomizer according to one embodiment of this application, wherein hollow arrows indicate the flow pattern of pump air and solid arrows indicate the direction of liquid flow; Figure 2 for Figure 1 A magnified view of area A in the middle; Figure 3 This is a schematic diagram of the structure of the guide vane according to one embodiment of this application; Figure 4 This is a schematic diagram of the internal structure of the atomizing cup according to one embodiment of this application; Figure 5 for Figure 4 A magnified view of area B in the middle, where the arrows indicate the direction of the liquid outlet; Figure 6 This is a schematic diagram of the structure of an atomizer according to one embodiment of this application; Figure 7 This is a cross-sectional view of an atomizer according to one embodiment of this application, wherein the arrows indicate the airflow direction; Figure 8 This is a schematic diagram of the structure of the screening component according to one embodiment of this application; Figure 9 for Figure 8 A structural schematic diagram of the middle screening component from another perspective; Figure 10 This is a cross-sectional view of the screening component according to one embodiment of this application; Figure 11 This is a schematic diagram of the atomizing cup according to one embodiment of this application.

[0023] in: 1. Screening component; 11. Main body; 12. Connecting part; 13. Cavity; 131. Inlet; 132. Outlet; 14. Guide vane; 141. Continuous spiral channel; 142. Axial flow channel; 15. Air inlet; 151. Baffle; 16. Docking part; 161. Docking interface; 162. Low section; 163. High section; 164. Guide section; 165. Limiting groove; 17. Guide structure; 18. Guide slope; 2. Atomizing cup; 21. Cup body; 211. Separating rib; 212. Medicine chamber; 213. Liquid storage area; 22. Cup core; 221. First body; 222. Second body; 223. Raised rib; 224. Liquid outlet; 2241. First liquid outlet; 2242. Second liquid outlet; 23. Pumping channel; 231. First channel; 232. Second channel; 24. Liquid suction channel; 25. Mist outlet; 26. Exhaust port; 27. Fixing raised rib; 271. Locking groove; 28. Pumping port; 3. Diverter; 31. Diverter rib; 32. Fixing part. Detailed Implementation

[0024] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0026] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0027] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0028] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "a particular embodiment," "example," or "specific example," etc., indicate that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0029] like Figure 1As shown, an atomizer includes an atomizing cup 2 for storing liquid medicine. The atomizing cup 2 has an atomizing component inside. The atomizing cup 2 has a pump port 28 and a mist outlet 25. The atomizer also includes a filter element 1 connected to the atomizing cup 2. The filter element 1 is provided with an inlet 131 and an outlet 132. The inlet 131 is connected to the mist outlet 25. The filter element 1 has a cavity 13 inside. At least one continuous spiral channel 141 is provided in the cavity 13, which extends spirally around the axis of the cavity 13 and connects the inlet 131 and the outlet 132, so that the aerosol particles can be classified by particle size under the action of centrifugal force.

[0030] The continuous spiral channel 141 provides a smooth spiral motion path for the aerosol particles. As the airflow carries the particles forward along the spiral channel, particles of different sizes are subjected to centrifugal forces of varying magnitudes. Larger particles, due to their larger mass and the significant centrifugal force they experience, exhibit greater radial drift during rotation, rapidly migrating to the channel sidewall and impacting for deposition. Ultimately, under the influence of gravity, they flow back along the wall into the atomizing cup 2 to re-participate in the atomization cycle. Smaller particles, due to their smaller mass and weaker centrifugal force, have limited radial drift and are carried by the airflow to continue moving along the spiral channel and exiting from the outlet 132.

[0031] Compared to the direct collision separation method, the centrifugal force screening mechanism of this application reduces the influence of airflow velocity on particle separation effect. Even if there is a certain pressure fluctuation in the pump air source, the centrifugal force on large particles is still much greater than that on small particles, and the screening threshold remains stable, effectively solving the problem of uncontrollable screening accuracy caused by unstable pump pressure.

[0032] The wall of the continuous spiral channel 141 has a smooth transition, and the airflow is in a rotating laminar flow state in the channel, which avoids the severe pressure pulsation caused by the repeated impact of the airflow on the baffle 151 in the traditional multi-layer inclined baffle 151 structure, and significantly reduces the working noise.

[0033] Because large-diameter aerosol particles are thrown to the side wall of cavity 13 under centrifugal force, a central airflow and spiral flow of small-diameter aerosol particles are formed in cavity 13, and large-diameter aerosol particles fall back from the edge. This arrangement separates the transport and return of aerosol particles in space, avoiding turbulence caused by random dripping after large particles settle, and also preventing the possibility of large particles being discharged from outlet 132 under the influence of airflow, thus ensuring the screening effect.

[0034] It should be noted that this application does not limit the formation method of the continuous spiral channel 141. In a preferred embodiment, such as... Figure 1 As shown, a spirally extending guide blade 14 is provided in the cavity 13 of the screening component 1, and the guide blade 14 forms a continuous spiral channel 141.

[0035] It should be noted that this application does not limit the number of continuous spiral channels 141. In a preferred embodiment, such as... Figure 3 As shown, there are two guide blades 14, both of which extend spirally around the central axis of the cavity 13 in opposite directions (one counterclockwise and the other clockwise), thus forming two continuous spiral channels 141 within the cavity 13. The aerosol particles entering through the inlet 131 are diverted from the airflow and evenly distributed into the two channels, ensuring that the screening element 1 maintains stable particle size classification efficiency under high flow conditions, and avoiding the problem of increased particle escape rate due to channel overload in single-channel schemes at high flow rates.

[0036] Furthermore, the double-helix channel doubles the spiral screening path within the same axial length, extending particle residence time and radial drift process, thus improving screening efficiency. The two channels with opposite directions of rotation also ensure that the reflux liquid falls back along its own independent spiral trajectory, with the reflux paths staggered circumferentially and without interference, avoiding local accumulation and secondary entrainment of the reflux liquid.

[0037] Furthermore, the two guide vanes 14 form a cross support in the cross section, which enhances the structural stiffness and bending strength of the guide vanes 14 against the impact of high-speed airflow and suppresses the vibration and noise of the guide vanes 14 caused by airflow.

[0038] Of course, in other embodiments, the number of guide vanes 14 may also be one, that is, a continuous spiral channel 141 is formed in the cavity 13, which is not limited here.

[0039] Furthermore, the particle relaxation time and radial migration speed can be controlled by designing the spiral inner diameter and spiral angle of the guide blade 14, thereby adjusting the particle screening intensity.

[0040] Preferably, such as Figure 3 As shown, the guide vane 14 also forms an axial flow channel 142 at the center of the cavity, and a continuous spiral channel 141 surrounds the outside of the axial flow channel 142.

[0041] Specifically, the guide vanes 14 are fixed to the inner wall of the cavity 13, and their inner edges form an axial flow channel 142. The axial flow channel 142 is located in the central region of the cavity 13, and the continuous spiral channel 141 is located on the periphery, and they are arranged coaxially and stacked to form a double-layer flow channel structure with an outer spiral and an inner straight flow. The airflow in the outer continuous spiral channel 141 rotates and advances, generating centrifugal force for particle screening, while the airflow in the central region's axial flow channel 142 moves in a straight line along the axial direction, providing a low-resistance, short-path, and rapid escape channel for the small particles it carries, effectively reducing the overall flow resistance of the screening element 1. The presence of the axial flow channel 142 allows some small aerosol particles to directly reach the outlet 132 through the central region without going through a complete spiral path after entering the cavity 13, shortening the residence time of effective particles in the screening element 1.

[0042] Furthermore, the wall of the axial flow channel 142 (i.e. the inner edge of the guide blade 14) forms the inner boundary of the continuous spiral channel 141. During the migration of large particles towards the side wall of the cavity 13 under the action of centrifugal force, they are subjected to the radial pressure gradient flowing outward from the center of the axial flow channel 142. This pressure gradient is opposite to the direction of the centrifugal force on the large particles. Only large particles with a sufficiently large radial drift can cross this pressure gradient barrier and reach the wall of the cavity 13, thus further improving the selectivity of particle size classification.

[0043] Preferably, the tilt angle of the guide vane 14 is 35°-55°, more preferably 45°-55°; the pitch p is 10-20 mm; The outer diameter D of the guide vane 14 is preferably D=D1-2g, where D1 is the inner diameter of the cavity and g=0.3-1mm; the inner diameter (diameter of the central axial flow channel 142) is 3-5mm; The effective length L of a single guide vane 14 is not less than 20 mm, preferably 30-45 mm, wherein L is at least 1-1.5 times the inner diameter of the cavity; The height of the guide vane 14 is close to the height of the cavity 13, preferably 10-20 mm.

[0044] It should be noted that the processing method of the guide blade 14 in this embodiment is not limited. Preferably, the guide blade 14 and the screening component 1 are an integral structure, that is, the guide blade 14 is formed as a built-in feature of the screening component 1 in one piece, without the need for additional assembly processes, resulting in a compact structure and low cost. Of course, the guide blade 14 can also be formed separately and then fixed to the inner wall of the cavity 13 by means of bonding, welding or interference fit.

[0045] In another embodiment, a spiral groove extending spirally around the cavity axis is directly formed on the inner wall of the screening component. This spiral groove extends spirally from near the inlet to near the outlet, with its opening facing inwards. The groove itself constitutes a continuous spiral channel for the aerosol particles to spiral forward. Aerosol particles from the atomizing cup enter the cavity through the inlet and are guided into the spiral groove, rotating and rising along its spiral trajectory. During this process, the aerosol particles are classified by centrifugal force. Larger particles migrate towards the sidewall of the groove (i.e., the side away from the cavity axis) and collide with and deposit, flowing back along the groove wall. Smaller particles remain inside and are output with the airflow.

[0046] In this embodiment, the cross-sectional shape of the spiral groove can be any shape suitable for guiding airflow, such as semi-circular, rectangular, trapezoidal, or U-shaped. The depth and width of the groove are set according to the target flow rate and the particle size to be screened. The spiral groove and the outer shell of the screen are integrally injection molded, eliminating the need for additional blade parts, simplifying processing, and eliminating assembly gaps or connection reliability issues between the blades and the screen.

[0047] In another embodiment, the screening element includes a shell and an inner core disposed inside the shell, with an annular continuous spiral channel formed between the inner wall of the shell and the outer wall of the inner core. After the aerosol particles enter the continuous spiral channel from the inlet, they advance along the spiral path to achieve centrifugal screening.

[0048] Specifically, such as Figure 1 As shown, cavity 13 is a cylindrical inner cavity, with inlet 131 and outlet 132 arranged opposite each other along the axis at both ends of the cylindrical inner cavity. Meanwhile, as... Figure 1 As shown, the cavity 13 has an inwardly protruding constriction at one end where the outlet 132 is located. The outlet 132 is located in the constriction so that the cross-sectional size of the outlet 132 is smaller than the cross-sectional size of the cavity 13, so that the aerosol gathers here and is output, increasing the flow rate so that it can be better inhaled into the lower respiratory tract.

[0049] It should be noted that this application does not limit the relative position of the atomizing cup 2 and the filter element 1. In one embodiment, such as... Figure 1 , Figure 6 As shown, a portion of the filter element 1 is inserted into the atomizing cup 2, while a portion is exposed outside the atomizing cup 2. In other embodiments, the filter element 1 may be located entirely inside the atomizing cup 2 or entirely outside the atomizing cup 2.

[0050] This application does not limit the atomization method of the atomizing component. In a preferred embodiment, such as... Figure 1 , Figure 2As shown, the atomizing component includes a pumping air channel 23 and a liquid suction channel 24. The liquid suction channel 24 has a liquid outlet 224, which is opened on the inner wall of the pumping air channel 23 so that the liquid collides with the high-speed airflow to form aerosol particles.

[0051] With the liquid outlet 224 aligned with the air outlet of the pumping channel 23, the high-speed airflow within the pumping channel 23 sweeps across the surface of the liquid outlet 224, creating a localized low-pressure zone at the outlet 224 according to Bernoulli's principle. This creates a suction effect on the liquid within the suction channel 24, allowing the liquid to be automatically drawn in and released from the outlet 224 without the need for an external liquid pump. This achieves pneumatic self-priming atomization, simplifying the overall structure of the atomizer and reducing manufacturing costs. The high-speed airflow collides directly with the liquid released from the outlet 224 at the air outlet of the pumping channel 23. The high shear force of the airflow tears the liquid into tiny droplets, achieving efficient energy transfer between the gas and liquid phases over the shortest distance, significantly improving atomization efficiency.

[0052] Furthermore, once generated, the aerosol particles are immediately enveloped and constrained by a high-speed airflow. The particles are rapidly accelerated and stably transported along the airflow direction to the inlet 131 of the subsequent screening element 1. This avoids the problems of aerosol particles dispersing, colliding, agglomerating, or adhering to walls in open spaces, thus improving the conveying efficiency and effective output ratio of the aerosol particles. The pumping channel 23 simultaneously constrains and rectifies the airflow, making the flow direction of the high-speed airflow more concentrated. A stable airflow shear force field is formed at the liquid outlet 224, which is beneficial for generating initial aerosol particles with a concentrated particle size distribution, reducing the screening burden on the subsequent screening element 1.

[0053] Compared to the traditional vibratory atomization method, this solution eliminates the need for a precision vibratory plate and its associated drive circuitry and frequency control module. This significantly reduces component costs and assembly precision requirements, and eliminates the atomization efficiency degradation issue caused by drug crystallization or deposition on the vibratory plate surface. It offers stable long-term performance and easy maintenance. Furthermore, the atomization rate of pneumatic atomization can be flexibly adjusted via pump airflow, catering to both the low mist volume required by infants and the high mist volume needed by adults. In addition, the atomization process shares the same power source as the delivery airflow, requiring only an additional power supply and drive unit. This facilitates the miniaturization and portability of the entire atomizer, providing a solid foundation for portable atomizer design.

[0054] Preferably, the liquid outlet 224 is inclined relative to the radial direction of the pump air channel 23 so that the liquid ejected from the liquid outlet 224 has a tangential velocity component along the circumference of the pump air channel 23.

[0055] The outlet 224 is oriented at an angle to the radial direction of the pump channel 23, which makes the outlet 224 form a swirling structure. This allows the aerosol particles to have sufficient circumferential motion components before entering the cavity 13, effectively shortening the establishment length required for stable swirling in the subsequent continuous spiral channel 141 and improving the overall screening efficiency.

[0056] In this embodiment, the number of liquid outlets 224 is not limited. In one embodiment, there is one liquid outlet; in another preferred embodiment, such as... Figure 4 , Figure 5 As shown, the liquid outlet 224 includes a first liquid outlet 2241 and a second liquid outlet 2242 arranged radially opposite to each other on both sides of the pump air channel 23. The liquid outlet directions of the first liquid outlet 2241 and the second liquid outlet 2242 are both inclined relative to the radial direction of the pump air channel 23, and the inclination directions of the first liquid outlet 2241 and the second liquid outlet 2242 are symmetrical about the central axis of the pump air channel 23, so that the liquid ejected from the first liquid outlet 2241 and the second liquid outlet 2242 respectively obtain tangential velocity components along the circumference and in the same direction of the pump air channel 23.

[0057] The liquid flow on both sides collides with the high-speed airflow in the same direction of rotation (such as both clockwise or counterclockwise), forming a superposition of rotational momentum in the same direction on the cross-section of the pump channel 23, which significantly enhances the initial rotational intensity of the aerosol particle group. The two liquid outlets 224 are symmetrically arranged about the central axis, which keeps the liquid distribution and liquid input efficiency on the cross-section of the pump channel 23 symmetrical and uniform. This avoids the problems of fog field skew, uneven particle concentration distribution and spiral filter inflow bias caused by unilateral or asymmetrical liquid supply, which is conducive to maintaining the stability and consistency of particle size classification.

[0058] Two liquid streams rotating in the same direction converge and overlap in the central region of the pump channel 23. The rotational momentum is efficiently injected into the aerosol particle group during the atomization stage, so that the aerosol particles have a certain initial tangential velocity during the atomization stage, ensuring that large particles have sufficient radial drift to reach the wall of the cavity 13 and be captured.

[0059] Preferably, the orientation of the first liquid outlet 2241 and the second liquid outlet 2242 is the same as the rotation direction of the continuous spiral channel 141, so that the aerosol particles smoothly enter the cavity 13 in an attitude that matches the rotation direction of the continuous spiral channel 141, thereby reducing the flow resistance and improving the pump source energy utilization efficiency.

[0060] Specifically, with Figure 5 Taking the perspective shown as an example, from this perspective, the first liquid outlet 2241 is located at... Figure 5 The second outlet 2242 is located in the upper middle part. Figure 5In the lower middle view, the first liquid outlet 2241 faces to the left and the second liquid outlet 2242 faces to the right, so that the liquid ejected from the two liquid outlets 224 respectively obtains a counterclockwise tangential velocity component.

[0061] Furthermore, the first liquid outlet 2241 and the second liquid outlet 2242 can be oriented horizontally, with one deviating to the left from the radial direction of the pumping air channel 23 and the other deviating to the right from the radial direction of the pumping air channel 23. Specifically, when the first liquid outlet 2241 and the second liquid outlet 2242 are oriented towards the tangential direction of the pumping air channel 23, the sprayed liquid cannot come into contact with the airflow. Therefore, on the horizontal plane, the radial direction of the pumping air channel 23 is set to 0°, the tangential direction is set to 90°, and the angle α between the orientation of the first liquid outlet 2241 and the second liquid outlet 2242 and the radial direction of the pumping air channel 23 should be 0° < α < 90°.

[0062] Furthermore, the first liquid outlet 2241 and the second liquid outlet 2242, while offset from the radial direction of the pump channel 23 on the horizontal plane, can also be tilted towards the filter element 1. For example, if the filter element 1 is located above the atomizing cup 2 in space, the first liquid outlet 2241 and the second liquid outlet 2242 can both be tilted upwards so that the liquid sprayed out has not only tangential velocity but also an initial velocity along the axial direction of the pump channel 23, thereby accelerating the entry of aerosol particles into the filter element 1 and improving overall efficiency.

[0063] It is understandable that, regardless of whether there is one, two or more liquid outlets 224, as long as the direction of the liquid sprayed out is at an angle to the radial direction of the pump air channel 23, the mixed aerosol particles can obtain tangential velocity, thereby accelerating the generation of vortex.

[0064] Preferably, such as Figure 2 As shown, the pumping channel 23 includes a first channel 231 and a second channel 232. The flow cross-sectional area of ​​the second channel 232 is smaller than that of the first channel 231. The liquid outlet 224 is opened on the inner wall of the second channel 232.

[0065] Because the cross-sectional area of ​​the second channel 232 is smaller than that of the first channel 231, under a constant flow rate, the reduced cross-sectional area leads to an increase in flow velocity, thus creating a localized high-speed airflow region within the second channel 232. The outlet 224 is positioned on the inner wall of this smaller cross-sectional area of ​​the second channel 232, placing it precisely at a location with higher airflow velocity. Here, the shear force of the airflow on the liquid is strongest, causing the liquid to be broken into fine droplets in a very short time, resulting in finer and more concentrated initial atomized particles. Simultaneously, the acceleration of the airflow within the second channel 232 enhances the negative pressure suction at the outlet 224, making the liquid intake smoother. Even with low remaining liquid or high viscosity, a stable liquid supply flow rate can be maintained, expanding the applicability of the atomizer to various liquids.

[0066] In a preferred embodiment, such as Figure 2 , Figure 4 , Figure 5 As shown, the air pumping channel 23 is coaxially arranged with the mist outlet 25, and the air outlet of the air pumping channel 23 faces the mist outlet 25.

[0067] The pumping channel 23 and the mist outlet 25 are arranged coaxially, ensuring that the entire flow path of the aerosol particles from generation to output is straight. The aerosol particles do not need to undergo directional changes during flow, eliminating particle loss and flow channel blockage caused by inertial impaction of the inner wall. Furthermore, the outlet of the pumping channel 23 directly faces the mist outlet 25. After atomization, the generated aerosol particles are transported to the mist outlet 25 via the shortest path. The aerosol particles maintain a flow direction consistent with the mainstream direction, efficiently preserving particle kinetic energy and avoiding kinetic energy loss due to changes in flow direction. This increases the rate at which aerosol particles reach the mist outlet 25, allowing patients to obtain effective aerosol more quickly and shortening the effective inhalation time window for each treatment.

[0068] Furthermore, the atomizing cup 2 and the screening component 1 are coaxially arranged, and the geometric center lines of the cavity 13, inlet 131, outlet 132, atomizing cup 2, pumping channel 23, pumping port 28, and mist outlet 25 coincide. This ensures uniform force distribution of the aerosol particles in the radial direction, preventing flow deviation due to eccentricity. The particle concentration distribution at the inlet 131 cross-section remains circumferentially uniform, which is beneficial for the stable operation of centrifugal screening. Simultaneously, the coaxial layout makes the alignment relationship between the components clear and precise, simplifying the assembly process, improving production efficiency, and reducing the risk of inconsistent product performance due to assembly eccentricity.

[0069] In one embodiment, such as Figure 2As shown, the atomizing cup 2 includes a cup body 21 and a cup core 22 placed inside the cup body 21. The cup core 22 includes a first body 221 and a second body 222 sleeved on the outside of the first body 221. At least a portion of the pumping channel 23 is located inside the first body 221, and a liquid suction channel 24 is formed between the first body 221 and the second body 222.

[0070] The device employs a nested structure with a first body 221 and a second body 222 fitted together. The liquid suction channel 24 is formed in the gap between the outer wall of the first body 221 and the inner wall of the second body 222. At least a portion of the pumping channel 23 is located inside the first body 221. That is, the pumping channel 23 and the liquid suction channel 24 are arranged in an inner-outer-outer stacked manner in space, resulting in a compact overall structure. The radial and axial dimensions of the atomizing cup 2 are effectively reduced, which is beneficial for the miniaturization design of the atomizer. Furthermore, the liquid suction channel 24 surrounds the outer periphery of the pumping channel 23, and the liquid in the liquid suction channel 24 converges evenly to the liquid outlet 224 from all circumferential directions. The liquid supply path is short and symmetrical, ensuring sufficient liquid supply at the liquid outlet 224 even at high atomization rates.

[0071] It should be noted that this embodiment does not limit the assembly method of the first body 221 and the second body 222. In one example, the first body 221 and the second body 222 are separate structures, so that they can be processed independently and assembled by nesting. In another example, the first body 221 and the second body 222 are integrally formed structures, that is, the cup core 22 is an integral structure, to ensure the size of the liquid absorption channel 24 and avoid changes in the liquid absorption size due to assembly errors, thereby affecting the atomization effect.

[0072] Furthermore, this embodiment does not limit the assembly method of the cup body 21 and the cup core 22. The cup body 21 and the cup core 22 can be an integral structure or a separate structure. For example, the cup core 22 can be designed to be removed from the inside of the cup body 21 so that the user can clean or disinfect the cup core 22 separately.

[0073] Specifically, such as Figure 1 As shown, the cup body 21 has a liquid cavity 212 for holding the liquid medicine. The bottom wall of the liquid cavity 212 has a sloping structure to form a liquid storage area 213 at the lowest point. The cup core 22 is disposed in the liquid storage area 213. This allows the liquid medicine in the liquid cavity 212 to naturally converge into the liquid storage area 213 under the action of gravity, and ensures that the liquid medicine is connected to the suction channel 24 when the amount of liquid medicine in the liquid cavity 212 is small. There is a gap between the lower end of the second body 222 and the liquid storage area 213 to connect to the suction channel 24, so that the liquid medicine in the liquid storage area 213 can be sucked into the suction channel 24.

[0074] Specifically, such as Figure 1As shown, the cup core 22 is coaxially arranged with the cup body 21, that is, the liquid storage area 213 is located in the center of the cup body 21, and the liquid in the liquid chamber 212 can enter the liquid suction channel 24 from all sides and be sprayed out from all sides or the sides to the central pumping channel 23.

[0075] like Figure 2 , Figure 4 , Figure 5 As shown, the second body 222 has a rib 223 extending towards the interior of the pumping channel 23 at the outlet end of the liquid suction channel 24, and the liquid outlet 224 is located on the rib 223. The rib 223 not only facilitates the placement of the liquid outlet 224, but its extension into the pumping channel 23 also allows the rib 223 to further reduce the flow cross-sectional area of ​​the pumping channel 23 at this location, thereby increasing the airflow velocity and enabling more vigorous collision with the liquid to complete atomization. Specifically, as... Figure 2 , Figure 5 As shown, there are two ribs 223 arranged radially opposite each other on both sides of the pumping air channel 23, and each of the two ribs 223 has a liquid outlet 224. Of course, there can also be more than two ribs 223, evenly arranged circumferentially along the pumping air channel 23.

[0076] like Figure 1 As shown, the cup body 21 has internal partition ribs 211, which divide the interior of the cup body 21 into sections arranged along its axial direction. Figure 1 The container has two chambers arranged vertically, with the upper chamber forming the liquid medicine chamber 212 and the partition rib 211 forming the bottom wall of the liquid medicine chamber 212. The partition rib 211 is also provided with a direction along the axial direction of the cup body 21 away from the screening element 1 (…). Figure 1 The wall extends downwards and encloses part of the area of ​​the pumping air channel 23.

[0077] Specifically, such as Figure 1 , Figure 2 , Figure 5 As shown, the pumping air channel 23 is partially surrounded by a wall from bottom to top, partly located inside the first body 221, and partly formed by an opening that connects the inside and outside of the first body 221 (cup core 22). The mist outlet 25 is surrounded by a rib 223.

[0078] It is understandable that to ensure the collision effect between the high-pressure airflow and the liquid medicine, i.e., the atomization effect, a high-pressure airflow needs to be pumped into the air pumping channel 23. However, this application does not limit the source of the high-pressure airflow. In one embodiment, the atomizer can be equipped with a portable high-pressure gas cylinder, i.e., by connecting the high-pressure gas cylinder to the air pumping port 28 of the air pumping channel 23, the gas in the high-pressure gas cylinder can be used as the atomizing gas source. Furthermore, by designing the interface of the air pumping channel 23 as a standardized interface, the high-pressure gas cylinder can become a standardized disposable consumable. When the gas inside is used up, the user can purchase a replacement gas cylinder and continue to use the atomizer. In another embodiment, a power element, such as a fan, can also be set at the air pumping port 28 of the air pumping channel 23. By driving the power element to start working, outside air is drawn in and pressurized, causing it to collide with the liquid medicine to complete atomization.

[0079] As a preferred embodiment of this application, such as Figure 1 , Figure 8 As shown, the atomizing cup 2 is also provided with a flow divider 3. The flow divider 3 is located between the atomizing component and the mist outlet 25. The flow divider 3 has a flow divider rib 31 facing the atomizing component. The width of the flow divider rib 31 gradually decreases from the side away from the atomizing component to the side closer to the atomizing component, so as to form a flow divider slope on the outer surface of the flow divider rib 31.

[0080] The conical structure faces the high-speed aerosol flow from the atomizing component. The narrow profile of the front end of the flow divider 31 smoothly splits the airflow in the central area and guides it to the surrounding areas. This causes the aerosol particles to begin accelerating circumferential rotation before entering the cavity 13, resulting in earlier cyclone formation. This increases the rotational intensity of the airflow inside the entire atomizing cup 2, ensuring that the airflow at the inlet 131 of the subsequent screening component 1 already has a certain pre-swirl velocity. This shortens the flow channel length required to establish a stable centrifugal force field within the continuous spiral channel 141, thus improving screening efficiency. At the same time, the early formation of the spiral airflow causes the particles to be subjected to a strong radial centrifugal force at the inlet 131. This advances the radial drift start point of large particles, lengthens their drift path, and significantly increases the probability of them being intercepted by impacting the wall.

[0081] In addition, the conical configuration of the diverter rib 31, which is narrow at the front and wide at the back, forces the airflow in the central region to deflect the particles radially outward. Due to their greater inertia, large particles are less likely to quickly follow the airflow deflection and enter the central air column region, thereby effectively reducing the risk of large particulate mist escaping from the central low-pressure area without sufficient centrifugal screening.

[0082] like Figure 1 , Figure 8 As shown, the flow divider 31 can be a conical structure, a frustum structure, etc., as long as its cross-sectional width gradually increases from the atomizing component to the screening component 1, and there is no limitation here.

[0083] Furthermore, such as Figure 4 , Figure 5 , Figure 8 , Figure 9 As shown, the diverter 3 is fixed to the cup core 22, and has a fixing part 32 that extends to the outside of the cup core 22. The filter element 1 has a docking part 16 that extends into the atomizing cup 2, forming a mating interface 161. The diverter 3 extends into the mating interface 161, and one of the docking part 16 and the fixing part 32 is provided with a limiting groove 165, and the other can cooperate with the limiting groove 165 to limit the rotation of the diverter 3 relative to the filter element 1. Figure 1 , Figure 4 As shown, the flow divider 31 is coaxially arranged with the pump air channel 23 and the cavity 13. like Figure 1 , Figure 10 As shown, the end of the cavity 13 facing the atomizing component (the end where the inlet 131 is located) is oriented towards the atomizing component ( Figure 10 The flow gradually contracts from top to bottom to form a guide slope 18 on the inner wall of the cavity 13.

[0084] In this embodiment, the orientation of the two liquid outlets 224 in the previous embodiment is such that the aerosol particles initially form a swirling flow before entering the cavity 13.

[0085] As a preferred embodiment of this application, such as Figure 1 , Figure 6 , Figure 7 As shown, inlet 131 and outlet 132 are arranged at both ends of the filter element 1 along the first direction. The filter element 1 is also provided with an air inlet 15, which faces the second direction and is perpendicular to the first direction.

[0086] Specifically, the first direction is the axial direction of the atomizer, and the second direction is the radial direction of the atomizer.

[0087] Inlet 131 and outlet 132 are arranged along the first direction. The aerosol particles flow axially inside the screen 1 without directional turning loss. The air inlet 15 faces the second direction perpendicular to the first direction (i.e., radial air intake). Outside air enters the screen 1 from the direction perpendicular to the main airflow. The main propagation direction of the noise source is perpendicular to the direction of the air inlet 15, which effectively prolongs the path of the noise directly radiating outward. The noise generated by the high-speed airflow and the mechanical noise generated by the pump source need to undergo directional turning when propagating outward from the air inlet 15. The sound wave is reflected and interfered and attenuated during the turning process, which reduces the noise intensity transmitted to the outside.

[0088] Lateral air intake also allows outside air to enter from the side wall of the filter element 1 and mix with the aerosol particle flow from the nebulizer cup 2 in the cavity 13. The replenishment of outside air not only regulates the delivery concentration and flow rate of the aerosol particles, but also plays a certain role in neutralizing the airflow temperature in the spiral channel, keeping the output aerosol close to room temperature and improving the patient's inhalation comfort.

[0089] Specifically, such as Figure 1 , Figure 6 , Figure 7 As shown, the filter element 1 includes a main body 11 and a connecting portion 12 surrounding the outer periphery of the main body 11. A cavity 13 is disposed inside the main body 11, and the connecting portion 12 is used for fixed connection with the atomizing cup 2. An air inlet 15 is formed on the side wall of the connecting portion 12, and multiple inlets are evenly arranged along the circumference of the filter element 1.

[0090] Furthermore, such as Figure 6 As shown, a baffle 151 is provided at the air inlet 15. The baffle 151 can move relative to the filter element 1 to change the opening area of ​​the air inlet 15, thereby adjusting the air intake volume. For example, as Figure 6 As shown, the air inlet 15 extends circumferentially along the filter element 1, and the baffle 151 is capable of lateral translation to block at least a portion of the air inlet 15.

[0091] In a preferred embodiment, such as Figure 7 As shown, the atomizing cup 2 has a buffer chamber inside that communicates with the air inlet 15, and the buffer chamber has an exhaust port 26 facing the mist outlet 25.

[0092] The air entering through inlet 15 first enters the buffer chamber, which has a certain volume and acts as a pressure stabilizing chamber for the airflow. The airflow velocity decreases and pressure fluctuations are absorbed and homogenized within the buffer chamber, forming a stable airflow before being discharged through outlet 26. This effectively suppresses the disturbance of the air source pulsation on the flow field of the mist-forming and screening areas, ensuring stable screening accuracy. Outlet 26 is oriented towards mist outlet 25, ensuring that the airflow direction discharged from the buffer chamber is consistent with the mist delivery direction. The supplementary airflow flows in the same direction as the mist particles, rather than undergoing lateral shearing or reverse impact, avoiding interference with the movement of mist particles and damage to the already formed particle size stratification.

[0093] Furthermore, the mist-forming port of the atomizing component also faces the mist outlet 25. The aerosol particles generated by the mist-forming port and the supplementary airflow discharged from the buffer chamber exhaust port 26 are in the same direction in space. The two airflows converge in front of the mist outlet 25 to form a co-current flow. During the confluence process, the aerosol particles are further accelerated and entrained by the supplementary airflow, the axial velocity of the particles increases, the residence time in the spiral screening channel is shortened, and the probability of small particles being carried out of the screener increases, which is conducive to improving the yield of particles with effective particle size.

[0094] In a preferred embodiment, such as Figure 7 As shown, the liquid medicine chamber 212 inside the atomizing cup 2, which is used to hold the liquid medicine, constitutes a buffer chamber, and the external airflow enters the liquid medicine chamber 212 from the air inlet 15. Of course, a separate buffer chamber, independent of the liquid medicine chamber 212, can also be set in the atomizing cup 2 for airflow buffering, separated from the liquid medicine, to avoid the airflow disturbing the liquid medicine.

[0095] Specifically, such as Figure 7 , Figure 8 , Figure 9 As shown, the filter element 1 has a docking portion 16 extending into the interior of the atomizing cup 2, the docking portion 16 forming a mating interface 161, which surrounds the outer periphery of the cup core 22. An exhaust port 26 is formed between the docking portion 16 and the outer wall of the cup core 22. Figure 7 As shown, after the external airflow enters through the air inlet 15, it first flows downward into the buffer chamber (medicine chamber 212), then flows radially towards the center of the medicine chamber 212, and finally flows upward along the axial direction through the exhaust port 26 into the interior of the screening element 1.

[0096] In a preferred embodiment, such as Figure 1 , Figure 10 As shown, the inlet 131 and the outlet 132 are arranged along the first direction. The inner wall of the cavity 13 is provided with a flow guiding structure 17, which is a groove or a rib, and the flow guiding structure 17 extends along the first direction.

[0097] When large particles of liquid medicine separated by centrifugation flow back along the inner wall of cavity 13, the grooves or ribs form an axial guiding track, guiding the reflux droplets downward along a fixed path. This prevents the reflux liquid from randomly spreading on the wall surface and from unevenly accumulating in the circumferential direction, ensuring the regularity and stability of the reflux path. The presence of the guiding structure 17 also increases the surface area and roughness of the inner wall of cavity 13. When droplets impact the wall surface, the edges and surfaces of the guiding structure 17 provide more droplet capture sites, improving the wall surface's capture efficiency for large particles. At the same time, the captured droplets are quickly guided away by the guiding structure 17, freeing up clean wall space for subsequent impacting droplets.

[0098] The flow guiding structure 17 can be a groove structure or a rib structure. There are multiple flow guiding structures 17, which are evenly spaced along the circumference of the cavity 13.

[0099] Specifically, such as Figure 10 As shown, the end of the cavity 13 facing the atomizing component (the end where the inlet 131 is located) is oriented towards the atomizing component ( Figure 10 The flow gradually contracts from top to bottom to form a guide slope 18 on the inner wall of the cavity 13, and the guide structure 17 is disposed on the guide slope 18.

[0100] Furthermore, such as Figures 8 to 10 As shown, the filter element 1 has a docking part 16 that is inserted into the atomizing cup 2. The docking part 16 forms a pair interface 161. The opening edge of the pair interface 161 has a low section 162 and a high section 163 in the circumferential direction. The lower edge of the low section 162 is lower than the lower edge of the high section 163. A guide section 164 is provided between the low section 162 and the high section 163.

[0101] The circumferential height of the port 161 is uneven, forming a staggered configuration of a low section 162 and a high section 163. When large particles of liquid medicine that have been screened and trapped flow back down the inner wall of the cavity 13 of the screening element 1 to the port 161, the backflowing liquid will automatically converge towards the low section 162 under the action of gravity and preferentially drip or flow back into the atomizing cup 2 from here. The low section 162 plays a role in collecting and directionally discharging the backflowing liquid, preventing the backflowing liquid from dripping randomly along the entire circumference of the port 161. The guide section 164 between the low section 162 and the high section 163 forms a smooth height transition slope. The backflowing liquid slides from the high to the low position along the slope of the guide section 164, and the flow path is smooth and continuous, avoiding splashing or stagnation of droplets at the height change point.

[0102] Specifically, such as Figure 7 As shown, the docking part 16 surrounds the outer periphery of the cup core 22, and the mist outlet 25 is located at the top of the cup core 22. This makes the mist outlet located at the center of the cup core 22, while the return point is on the outer periphery of the cup core 22, so that the two fluids do not interfere with each other and prevent the return droplets from being blown back into the cavity 13 by the airflow.

[0103] like Figure 9 As shown, there are two lower segments 162, which are located on opposite sides of the docking portion 16 in the radial direction, and the higher segment 163 is located between the two lower segments 162.

[0104] In a preferred embodiment, such as Figure 9 As shown, the guide section 164 is provided with an arc-shaped surface to guide the liquid in the high section 163 to flow to the low section 162. Of course, the guide section 164 can also be an inclined surface, etc., which is not limited here.

[0105] Preferably, the filter element 1 is detachably connected to the atomizing cup 2 and is coaxially arranged with the atomizing cup 2.

[0106] The filter element 1 and the atomizing cup 2 are connected by a detachable structure, which allows users to easily remove the filter element 1 from the atomizing cup 2 to clean and disinfect the spiral channel inside the filter element 1. This effectively removes drug residues and microorganisms attached to the inner wall of the channel, avoiding channel blockage and bacterial growth caused by long-term use, and ensuring the hygiene, safety and service life of the atomizer.

[0107] The detachable structure also allows users to replace the filter element 1 with different spiral parameters (such as pitch, guide angle, number of heads, etc.) according to different treatment needs, realizing a modular design that allows the same nebulizer cup 2 body 11 to match multiple filter specifications, reducing the user's purchase cost.

[0108] Specifically, such as Figure 1 , Figure 6 , Figure 9 As shown, the filter element 1 includes a main body 11 and a connecting part 12 surrounding the outer periphery of the main body 11. A cavity 13 is disposed inside the main body 11, and the connecting part 12 is used for fixed connection with the atomizing cup 2. The fixing part 32 is provided with a downwardly folded flange surrounding the outer periphery of the atomizing cup 2. Fixing structures are respectively provided on the outer wall of the atomizing cup 2 and the inner side of the flange for fixing the two together.

[0109] For example, in one embodiment, such as Figure 11 As shown, the outer wall of the atomizing cup 2 is provided with a fixing rib 27. The width of the fixing rib 27 gradually decreases from one end to the other in its circumferential direction. A corresponding slide (not shown in the figure) is provided on the flange. The slide also has a structure where the width gradually decreases from one end to the other, so that after the user aligns one end of the fixing rib 27 with one end of the slide, the fixing rib 27 can slide into the slide by rotating the filter element 1 and the atomizing cup 2 relative to each other, and the two gradually tighten together with rotation, achieving fixation. Alternatively, the fixing rib 27 can be provided on the flange, and the slide can be provided on the atomizing cup 2 accordingly. To remove them, simply rotate in the opposite direction.

[0110] Preferably, such as Figure 11 As shown, one of the slide and the fixed rib 27 is also provided with a locking rib, and the other is provided in the locking groove 271. When the two are screwed together and locked, the locking rib is located in the locking groove 271, so that the atomizing cup 2 and the filter element 1 are locked.

[0111] Of course, in other embodiments, the atomizing cup 2 and the filter element 1 can also be fixed in other ways, such as threaded connection, snap-fit ​​connection, etc., which are not limited here.

[0112] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0113] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0114] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A nebulizer, comprising a nebulizing cup for storing a liquid medicine, the nebulizing cup having an atomizing assembly inside, the nebulizing cup having a pump port and a mist outlet, characterized in that, The atomizer also includes a filter element connected to the atomizing cup. The filter element has a cavity inside, and an inlet and an outlet communicating with the cavity. The inlet is connected with the mist outlet. The cavity is provided with at least one continuous spiral channel that extends spirally around the axis of the cavity and communicates with the inlet and the outlet, so that the aerosol particles can be classified by particle size under the action of centrifugal force.

2. The atomizer according to claim 1, characterized in that, The atomizing component includes a pumping air channel and a liquid suction channel. The liquid suction channel has a liquid outlet, which is located on the inner wall of the pumping air channel, so that the liquid collides with the high-speed airflow to form aerosol particles.

3. The atomizer according to claim 2, characterized in that, The liquid outlet is inclined relative to the radial direction of the pump air channel so that the liquid ejected from the outlet has a tangential velocity component along the circumference of the pump air channel.

4. The atomizer according to claim 3, characterized in that, The liquid outlet is one; or... The liquid outlet includes a first liquid outlet and a second liquid outlet disposed opposite to each other on both sides of the pump air channel. The liquid outlet directions of the first liquid outlet and the second liquid outlet are both inclined relative to the radial direction of the pump air channel, and the inclination directions of the first liquid outlet and the second liquid outlet are symmetrical about the central axis of the pump air channel, so that the liquid ejected from the first liquid outlet and the second liquid outlet respectively obtains a tangential velocity component along the circumference of the pump air channel and in the same direction.

5. The atomizer according to claim 2, characterized in that, The pumping channel includes a first channel and a second channel. The flow cross-sectional area of ​​the second channel is smaller than that of the first channel. The liquid outlet is located on the inner wall of the second channel.

6. The atomizer according to claim 2, characterized in that, The air pumping channel is coaxially arranged with the mist outlet, and the air outlet of the air pumping channel faces the mist outlet.

7. The atomizer according to claim 2, characterized in that, The atomizing cup includes a cup body and a cup core placed inside the cup body. The cup core includes a first body and a second body sleeved outside the first body. At least a portion of the pumping channel is located inside the first body, and the liquid suction channel is formed between the first body and the second body.

8. The atomizer according to claim 1, characterized in that, The atomizing cup is also provided with a flow divider, which is disposed between the atomizing component and the mist outlet. The flow divider has a flow divider rib facing the atomizing component. The width of the flow divider rib gradually decreases from the side away from the atomizing component to the side closer to the atomizing component, so as to form a flow divider slope on the outer surface of the flow divider rib.

9. The atomizer according to claim 1, characterized in that, The inlet and the outlet are disposed at both ends of the filter element along a first direction. The filter element also has an air inlet facing a second direction, which is perpendicular to the first direction.

10. The atomizer according to claim 9, characterized in that, The atomizing cup has a buffer chamber inside that communicates with the air inlet, and the buffer chamber has an exhaust port facing the mist outlet.

11. The atomizer according to claim 1, characterized in that, The inner wall of the cavity is provided with at least one guide vane, which extends spirally around the axis of the cavity to form the continuous spiral channel.

12. The atomizer according to claim 11, characterized in that, The guide vanes form an axial flow channel at the center of the cavity, and the continuous spiral channel surrounds the outside of the axial flow channel.

13. The atomizer according to claim 1, characterized in that, The inlet and the outlet are disposed on the screening member along the first direction, and the inner wall of the cavity is provided with a flow guiding structure, which is a groove or a rib, and the flow guiding structure extends along the first direction.

14. The atomizer according to claim 13, characterized in that, The filter element has a docking portion that is inserted into the atomizing cup. The docking portion forms a pair of interfaces. The opening edge of the pair of interfaces has a low segment and a high segment in the circumferential direction. The lower edge of the low segment is lower than the lower edge of the high segment. A guide segment is provided between the low segment and the high segment.

15. The atomizer according to claim 1, characterized in that, The filter element is detachably connected to the atomizing cup and is coaxially arranged with the atomizing cup.

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