Nozzle and atomization device

Abstract

The invention provides a nozzle and an atomization device. The nozzle is provided with a diversion cavity; an inlet and an outlet are formed in the side wall of the diversion cavity; an atomizing medium enters the nozzle from the inlet and is sprayed out from the outlet through the flow guide cavity. Wherein the outlet comprises at least four collision runners; the at least four collision runners are provided with multi-stage collision areas; therefore, jet flow ejected from each colliding flow channel can pass through the multiple stages of colliding areas to be collided for multiple times, the initial kinetic energy of the ejection column ejected from the outlet is fully utilized to crush the atomization medium to form aerosol, the energy utilization efficiency is improved, and the atomization effect of the nozzle is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of atomization, and particularly relates to a nozzle and an atomization device. Background Art

[0002] Soft atomization technology does not require the use of propellants, and compared with traditional sprays or dry powder inhalers, it has a lighter jet force, a more gentle speed, and a small atomization particle size. These characteristics make the aerosol formed by atomization easier to reach the lungs of users.

[0003] The high-pressure microfluidic nozzle is a key component for realizing soft atomization. However, for the existing high-pressure microfluidic nozzles, their energy utilization rate is relatively low and the atomization effect is not ideal. Summary of the Invention

[0004] The nozzle and the atomization device provided in this application aim to solve the problems in the related art that the energy utilization rate of the nozzle is relatively low and the atomization effect is not ideal.

[0005] To solve the above technical problems, a technical solution adopted in this application is: to provide a nozzle, the nozzle has a diversion cavity; the side wall of the diversion cavity has an inlet and an outlet; wherein, the outlet includes at least four counterflow channels; at least four of the counterflow channels have a multi-stage collision area.

[0006] In an embodiment, the nozzle has an axis, and the at least four counterflow channels are distributed on both sides of the axis, and all the counterflow channels on the same side of the axis have a first-stage collision area, so that the first jets flowing out of all the counterflow channels on the same side of the axis collide with each other in the first-stage collision area and then converge into a second jet; the at least four counterflow channels also have a second-stage collision area, so that the second jets formed after converging on both sides of the axis collide with each other in the second-stage collision area and then converge into a third jet.

[0007] In an embodiment, among all the counterflow channels on the same side of the axis, the jet angle of the counterflow channels gradually decreases in the direction away from the axis.

[0008] In an embodiment, among all the counterflow channels on the same side of the axis, the jet angle of the counterflow channel closest to the axis is less than 75°; the jet angle of the counterflow channel farthest from the axis is greater than 30°.

[0009] In an embodiment, among all the counterflow channels on the same side of the axis, the width of the counterflow channels gradually decreases in the direction away from the axis.

[0010] In an embodiment, the width of the counterflow channel is greater than or equal to 4 μm and less than or equal to 20 μm.

[0011] In one embodiment, the at least four impinging channels are arranged axially symmetrically with respect to the axis, and the extension line of each impinging channel along its extending direction intersects the axis; the second-stage impinging zone is located on the axis.

[0012] In one embodiment, the nozzle has an axis, the total number of the at least four impinging channels is odd, one of the impinging channels is arranged on the axis, and all the other impinging channels are symmetrically distributed on both sides of the axis.

[0013] In one embodiment, the outlet further includes a confinement channel; the guiding cavity is communicated with the confinement channel through the impinging channels, and at least one stage of the multi-stage impinging zone is located in the confinement channel.

[0014] In one embodiment, all the multi-stage impinging zones are located in the confinement channel.

[0015] In one embodiment, the last stage of the multi-stage impinging zone is tangent to the liquid outlet port of the confinement channel far from the impinging channels.

[0016] In one embodiment, the height of the confinement channel is greater than or equal to the height of the impinging channels.

[0017] In one embodiment, the width of the confinement channel is greater than or equal to the distance between the outer side surfaces of the liquid outlet ports of the two outermost impinging channels.

[0018] To solve the above technical problems, the second technical solution provided by this application is: to provide an atomization device, including the nozzle according to any one of the above.

[0019] Advantages of this application: Different from the prior art, this application provides a nozzle, which has a guiding cavity; the side wall of the guiding cavity has an inlet and an outlet; the atomization medium enters the nozzle from the inlet and is ejected from the outlet through the guiding cavity. Among them, the outlet includes at least four impinging channels; the at least four impinging channels have a multi-stage impinging zone; in this way, the jet ejected from each impinging channel can pass through the multi-stage impinging zone to perform multiple impingements, so as to make full use of the initial kinetic energy of the jet ejected from the outlet to break the atomization medium to form an aerosol, improving the energy utilization efficiency and thus improving the atomization effect of the nozzle. Description of the Drawings

[0020] Figure 1 is a schematic diagram of the overall structure of the nozzle provided by an embodiment of this application;

[0021] Figure 2 is an exploded view of the nozzle provided by an embodiment of this application;

[0022] Figure 3 is a perspective view of the nozzle in the Y direction provided by an embodiment of the present application;

[0023] Figure 4 is Figure 3 an enlarged view of the position P in

[0024] Figure 5 a schematic cross-sectional view of the nozzle at the fluid outlet;

[0025] Figure 6 is a jet impingement diagram of the nozzle in the related art;

[0026] Figure 7 is provided by an embodiment of the present application Figure 2 a jet impingement diagram of the shown nozzle;

[0027] Figures 8 - 9 is a simulation diagram of the aerosol morphology when the hydraulic pressures at the inlets of the first test piece are 24 Mpa and 48 Mpa respectively;

[0028] Figure 10 is a simulation diagram of the aerosol morphology when the hydraulic pressure at the inlet of the second test piece is 24 Mpa;

[0029] Figure 11 is a perspective view of the nozzle in the Y direction provided by another embodiment of the present application;

[0030] Figure 12 is Figure 12 a schematic cross-sectional view of the nozzle at the fluid outlet of

[0031] Figure 13 a partial schematic view of the first substrate provided by another embodiment of the present application.

[0032] Explanation of the reference numerals in the drawings:

[0033] 2 - nozzle; 21 - first substrate; 211 - groove structure; 2111 - diversion groove; 2112 - impingement groove; 2113 - notch; 22 - second substrate; 23 - diversion cavity; 24 - inlet; 25 - outlet; 26 - impingement flow channel; 261 - first impingement flow channel; 262 - second impingement flow channel; 263 - first-stage impingement area; 264 - second-stage impingement area; 27 - constraint flow channel. Detailed implementation manners

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0035] The terms "first", "second", and "third" in the present application 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", "second", and "third" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined. All directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally further include steps or units not listed, or may optionally further include other steps or units inherent to these processes, methods, products, or devices.

[0036] Referring to "embodiments" herein means that the specific features, structures, or characteristics described in connection with the embodiments may be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein may be combined with other embodiments.

[0037] For existing high-pressure nozzles, their atomization effects are not very ideal. For example, unidirectional flow nozzles are difficult to meet the requirement that the median particle size for inhaled drug delivery is less than 5 microns. Although the high-pressure microfluidic nozzle structure (soft atomization high-pressure nozzle) in some technologies can meet the requirements of inhaled drug delivery, as the atomization flow rate increases, the atomization angle will continuously increase. And an overly large atomization angle will cause the atomization medium to impact the outlet structure of the nozzle and interfere with the structure near the outlet of the atomization device, resulting in residue of the atomization medium during the atomization process, thereby causing waste of the atomization medium and a decrease in the utilization rate of the atomization medium. Moreover, for a high atomization flow rate, the nozzle often requires a higher pressure. Among them, the atomization angle refers to the cone formed by the atomized liquid ejected from the nozzle expanding around the axis of the nozzle, and its cone apex angle is the atomization angle of the liquid nozzle.

[0038] Based on this, an embodiment of the present application provides a nozzle, which effectively improves the atomization effect of the nozzle, reduces the atomization angle, and reduces the residue of the atomization medium.

[0039] The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0040] The present application provides an atomization device. The atomization device is used to atomize the provided atomization medium to form an aerosol for users to inhale. The atomization device can be used in fields such as medical atomization, recreational inhalation, and beauty atomization. The atomization medium may include a liquid matrix, such as oils, liquid medicines, etc. added with active ingredients. The device includes a nozzle 2, and the nozzle 2 forms an aerosol through the atomization medium flow provided by the atomization device that generates a liquid flow. For the specific structure and function of the nozzle 2, reference can be made to the relevant description of the nozzle 2 in the following embodiments.

[0041] As Figures 1 - 3 , Figure 1 is a schematic diagram of the overall structure of the nozzle provided by an embodiment of the present application; Figure 2 is a disassembled schematic diagram of the nozzle provided by an embodiment of the present application; Figure 3 is a perspective view of the nozzle along the Y direction provided by an embodiment of the present application. An embodiment of the present application provides a nozzle 2, which can be a cuboid, cube, cylinder, cone, etc. The nozzle 2 has a diversion cavity 23, an inlet 24, and an outlet 25. The diversion cavity 23 mainly serves to connect the inlet 24 and the outlet 25. When the nozzle 2 works, the atomization medium flows into the diversion cavity 23 from the inlet 24 and flows out of the diversion cavity 23 through the outlet 25.

[0042] In one embodiment, as Figure 2 , the nozzle 2 includes a first substrate 21 and a second substrate 22. Each of the first substrate 21 and the second substrate 22 has an installation side, and they can be connected to each other to install the first substrate 21 and the second substrate 22 together. At least one of the first substrate 21 and the second substrate 22 has a groove structure 211. The first substrate 21 and the second substrate 22 cooperate to form the diversion cavity 23, the inlet 24, and the outlet 25. In some embodiments, the first substrate 21 and the second substrate 22 can be made of materials such as ceramics and glass.

[0043] Specifically, in one embodiment, the groove structure 211 is formed on the surface of the first substrate 21 facing the second substrate 22. The groove structure 211 includes a diversion channel 2111. The diversion channel 2111 is recessed downward by a certain depth in a direction away from the second substrate 22. In some embodiments, the depth D of the diversion channel 2111 is less than the thickness of the first substrate 21. In other embodiments, the depth D of the diversion channel 2111 may be equal to the thickness of the first substrate 21, that is, the diversion channel 2111 penetrates through the first substrate 21; in this case, the nozzle 2 may further include a third substrate, and the second substrate 22 and the third substrate respectively enclose the diversion channel 2111 from both sides of the first substrate 21.

[0044] Combined with Figures 2 to 4 , Figure 4 is Figure 2 an enlarged view of point P in. The diversion channel 2111 has opposite first and second sidewalls. The first sidewall has a plurality of collision grooves 2112, and the second sidewall has a plurality of notches 2113. The second substrate 22 covers the diversion channel 2111, the collision grooves 2112, and the notches 2113 respectively, thereby forming a diversion cavity 23, a collision flow channel 26, and an inlet 24 respectively. The diversion cavity 23 communicates with the collision flow channel 26 and the inlet 24. The nozzle 2 is used as a liquid atomizer. Correspondingly, the nozzle 2 includes a plurality of inlets 24, and each inlet 24 is separated from each other by a partition column therebetween. The partition column causes the atomization medium flowing into the diversion cavity 23 to form multiple beams of flow, so as to play a certain role in anti-blocking and filtering.

[0045] In some embodiments, downstream of the inlet 24, one or more stages of filter structures (not shown in the figure), such as dense raised small cylinders, etc., may also be provided in the diversion cavity 23. The filter structure on the one hand helps to reduce the impurity particles in the atomization medium from further flowing to the outlet 25 and blocking the outlet 25, and on the other hand also helps to further divide the beams of flow in the diversion cavity 23. Among them, the downstream of the inlet 24 refers to other positions on the nozzle 2 that the atomization medium passes through after flowing through the inlet 24 along the flow path of the atomization medium in the nozzle 2.

[0046] The nozzle 2 has a diversion cavity 23, and the sidewall of the diversion cavity 23 has an inlet 24 and an outlet 25. Among them, the outlet 25 includes at least four collision flow channels 26; all the collision flow channels 26 of the nozzle 2 have multiple-stage collision zones. Combined with Figure 5 , Figure 5It is a schematic cross-sectional view of the nozzle at the fluid outlet. The multi-stage collision zone means that the jets flowing out from each collision channel 26 do not all converge at one place. Instead, the jets flowing out from some of the collision channels 26 first converge with the jets flowing out from other collision channels 26 in the first-stage collision zone to form a first jet, and the first jet formed by the convergence of the first jets flowing out from other collision channels 26 will converge again in the second-stage collision zone and collide to form a second jet; the second jet formed by the convergence of the second jets formed by the convergence of the second jets with other first jets will converge again in the third-stage collision zone and collide to form a third jet... and so on. It can be understood that every time the jets flowing out from the same collision channel 26 collide with the jets flowing out from other collision channels 26, the area where the collision occurs forms a stage of the collision zone; the number of stages of the collision zone is the same as the number of times the jets flowing out from each collision channel 26 collide.

[0047] In this way, after the atomizing medium passes through the inlet 24, it reaches the diversion cavity 23 of the nozzle 2. At least four collision channels 26 of the outlet 25 divide the atomizing medium into multiple columns of jets, and each column of jets will pass through the multi-stage collision zone and undergo multi-stage collisions, causing the jets to split into droplets. By means of multi-stage collisions, it is beneficial to further improve the atomization effect and reduce the median particle size.

[0048] For the convenience of understanding and explanation, all the following embodiments of the present application take the example that all the collision channels 26 of the nozzle 2 have two-stage collision zones: the first-stage collision zone and the second-stage collision zone for illustration.

[0049] In the embodiments of the present application, the number of outlets 25 is equal to the number of collision channels 26.

[0050] The diversion cavity 23 should be as wide as possible and then contract through a large-angle contraction section near the outlet 25, so that the contraction section will be shorter, which is beneficial to reducing the flow resistance.

[0051] In some embodiments, such as Figure 5 , the number of collision channels 26 in the nozzle 2 is greater than or equal to four. The nozzle 2 has an axis M, and at least four collision channels 26 are distributed on both sides of the axis M. Among them, the axis M can be the central axis of the nozzle 2 along its length or width direction. Each side of the axis M includes at least two collision channels 26. All the collision channels 26 located on the same side of the axis M have a first-stage collision zone 263, so that the first jets flowing out from all the collision channels 26 located on the same side of the axis M collide with each other in the first-stage collision zone 263 and then converge into a second jet. All the collision channels 26 in the nozzle 2 also have a second-stage collision zone 264, so that the second jets formed after converging on both sides of the axis M collide with each other in the second-stage collision zone 264 and then converge into a third jet. Among them, the second-stage collision zone 264 is located on the axis M. By means of two collisions, the initial kinetic energy of the jets can be fully utilized to improve the atomization effect.

[0052] As described above, at least four impinging flow channels 26 are provided at the outlet 25 of the nozzle 2, and the at least four impinging flow channels 26 have multiple impinging zones. In this way, the atomizing medium enters through the hydraulic pressure from the inlet 24, and after flowing through the entire diversion cavity 23, the liquid will flow out through the outlet 25. In practical applications, depending on the pressure applied to the atomizing medium, the atomizing medium will be ejected through the outlet 25 at a certain ejection speed. The atomizing medium in the diversion cavity 23 is respectively ejected from the diversion cavity 23 through at least four impinging flow channels 26 and converges in the impinging zone. Among them, two jets collide with each other in the first-stage impinging zone 263, and the other two jets also collide with each other in the first-stage impinging zone 263 at the same time. The atomizing medium collides at the first-stage impinging zone 263 formed by at least four impinging flow channels 26 to form at least two jets. The at least two jets after collision collide in the second-stage impinging zone 264... and so on in a cycle, using the kinetic energy of the jets to achieve the fragmentation of the liquid column to form an aerosol. Multiple impingements can make full use of the initial kinetic energy of the jets to improve the energy utilization efficiency, thereby improving the atomizing effect of the nozzle 2.

[0053] Among them, in combination with Figure 5 , among all the impinging flow channels 26 located on the same side of the axis M, the ejection angle β of the impinging flow channel 26 gradually decreases from the direction away from the axis M. For example, among the two impinging flow channels 26 located on the left side of the axis M, the ejection angle β1 of the first impinging flow channel 261 closest to the axis M is greater than the ejection angle β2 of the second impinging flow channel 262. The ejection angle β is the angle between the extension line of the impinging flow channel 26 along its extending direction and the edge of the nozzle 2.

[0054] The above settings can make all the impinging flow channels 26 located on the same side of the axis M approach each other and collide in the same impinging zone for the first atomization, and converge into a second jet, and then collide again with the second jet on the other side in the second impinging zone for the second atomization, thereby improving the atomizing effect and the energy utilization rate of the atomizing medium.

[0055] Among them, among all the impinging flow channels 26 located on the same side of the axis M, the ejection angle β2 of the impinging flow channel 26 closest to the axis M is less than 75°; the ejection angle β1 of the impinging flow channel 26 farthest from the axis M is greater than 30°. For example, β1 can be 30°, 40° or 45°, etc. β2 can be 75°, 60° or 45°, etc. In this angle range, it can be ensured that all the impinging flow channels 26 located on the same side of the axis M can collide in the first-stage impinging zone 263 to atomize the atomizing medium flowing out of each impinging flow channel 26 by collision, thereby improving the atomizing effect and utilization rate of the atomizing medium.

[0056] It can be understood that the ejection angle β of each impinging flow channel 26 located on the same side of the axis M is greater than or equal to 30° and less than or equal to 75°; for example, it can be 30°, 40°, 50°, 60°, 75°, etc.

[0057] As Figure 5 。In one embodiment, the number of the counterflow channels 26 on both sides of the axis M can be the same, and the counterflow channels 26 on both sides of the axis M are arranged axially symmetrically with respect to the axis M. The extension lines of the two counterflow channels 26 arranged axially symmetrically with respect to the axis M intersect at the axis M in their respective extending directions, and the intersection point is Qi; the included angle between the corresponding extension lines is called the counterflow angle αi. i is a natural number greater than or equal to 2.

[0058] Combined with Figure 5 It can be understood that for all the counterflow channels 26 on the same side of the axis M, as the distance between the counterflow channel 26 and the axis M gradually increases, the counterflow angle α corresponding to the counterflow channel 26 and another symmetrically arranged counterflow channel 26 also gradually increases. For example, α2 > α1. In some embodiments, the counterflow angle corresponding to each counterflow channel 26 is greater than or equal to 30° and less than or equal to 120°; for example, it can be 30°, 50°, 60°, 90°, 120°, etc.

[0059] Specifically, for all the counterflow channels 26 on the same side of the axis M, according to the distance between each counterflow channel 26 and the axis M, the linear distance from the intersection point Qi corresponding to each counterflow channel 26 to the end face where the counterflow channel 26 intersects the edge of the nozzle 2 is defined as Hi; the positional relationship of all the counterflow channels 26 of the nozzle 2 should satisfy Hi > Hj and αi < αj (2 ≤ i < j). Under this condition, the atomization effect can be effectively improved.

[0060] Combined with Figure 1 and Figure 5The outlet 25 includes four impinging flow channels 26, with two impinging flow channels 261 provided on each side of the axis M. Along the direction away from the axis M, they are respectively referred to as the first impinging flow channel 261 and the second impinging flow channel 262. The injection angle of the first impinging flow channel 261 is β1; the included angle corresponding to the intersection point Q1 of the extension line of the first impinging flow channel 261 along its extension direction and the extension line of the first impinging flow channel 261 on the other side of the axis M is α1, and the linear distance from the intersection point Q1 to the straight line of the end face where the impinging flow channel 261 intersects with the edge of the nozzle 2 is H1. The injection angle of the second impinging flow channel 262 is β2; the included angle corresponding to the intersection point Q2 of the extension line of the second impinging flow channel 262 along its extension direction and the extension line of the second impinging flow channel 262 on the other side of the axis M is α2; the linear distance from the intersection point Q2 to the straight line of the end face where the impinging flow channel 262 intersects with the edge of the nozzle 2 is H2. Among them, α2 > α1, β1 > β2, H1 > H2, preferably 1 / 3H1 ≤ H2 ≤ 2 / 3H1. At this time, the first impinging flow channel 261 and the second impinging flow channel 262 on the same side of the axis M will collide in the first-stage impinging zone 263, and then the two jets will converge into one jet, that is, at this time, the four jets will become two jets after one collision, and then these two jets will collide in the second-stage impinging zone 264. Through two collisions, the initial kinetic energy of the jet column can be fully utilized to improve the atomization effect.

[0061] Among them, the distance between the second-stage impinging zone 264 and the first-stage impinging zone 263 cannot be too large. Because after the first-stage collision, the jet column formed by the convergence will become unstable. When the distance of the second-stage impinging zone 264 is too far, the speed during the second-stage collision will drop severely, and even the jet after the first-stage collision will split, and the jet will be atomized into aerosol, and there will be no jet collision in the second-stage impinging zone 264, but an interference phenomenon of aerosol.

[0062] For this reason, in some embodiments, α1 can be greater than or equal to 40 degrees and less than or equal to 80 degrees, and α2 can be greater than or equal to 80 degrees and less than or equal to 120 degrees. Preferably, α1 can be greater than or equal to 50 degrees and less than or equal to 70 degrees, and α2 can be greater than or equal to 80 degrees and less than or equal to 100 degrees. More preferably, α1 can be greater than or equal to 55 degrees and less than or equal to 65 degrees, and θ2 can be greater than or equal to 85 degrees and less than or equal to 95 degrees. In Figure 5 it, α1 is 60 degrees and α2 is 90 degrees.

[0063] Through long-term research by the inventors of the present application, it is found that the width of the impinging flow channel 26 determines the flow rate of the corresponding impinging flow channel 26. The wider the width of the impinging flow channel 26, the greater the flow rate. The magnitude of the flow rate in turn determines the kinetic energy and momentum of the flow. The greater the flow rate, the greater the kinetic energy and momentum of the flow. After impinging and merging, the jet flow tends to flow in the direction of the larger flow rate. Therefore, multiple impinging flow channels 26 are required to achieve secondary collision atomization. In view of this, the spray pattern can be adjusted by adjusting the widths of multiple impinging flow channels 26 located on the same side of the axis M.

[0064] In one embodiment, for all the impinging flow channels 26 located on the same side of the axis M, as the distance of the impinging flow channel 26 from the axis M gradually increases, the width of the impinging flow channel 26 gradually decreases. In this way, the atomization angle θ can be reduced and the residue of the atomizing medium can be decreased. As Figure 5 shown. The width L2 of the second impinging flow channel 262 located on the same side of the axis M is smaller than the width L1 of the first impinging flow channel 261. The second impinging flow channel 262 is close to one side edge of the nozzle 2. In this way, the impact force of the atomizing medium after being pressurized on this side edge of the nozzle 2 in the second impinging flow channel 262 is small, reducing the risk of damage to the edge of the nozzle 2.

[0065] In some embodiments, for the impinging flow channels 26 with an impinging angle α greater than or equal to 80 degrees and less than or equal to 100 degrees, their widths are greater than the widths of the impinging flow channels 26 corresponding to other impinging angles α of different magnitudes. This can ensure the atomization effect and reduce the particle size of the aerosol.

[0066] In one embodiment, the width of the impinging flow channel 26 is approximately equal to 4 μm and less than or equal to 20 μm, such as 4 μm, 10 μm, 15 μm, 20 μm, etc. In this way, it can ensure that the atomizing medium flowing out of the impinging flow channel 26 has a certain kinetic energy to collide with each other to achieve atomization, and can reduce the risk of an overly large atomization angle θ caused by a relatively large atomization flow rate.

[0067] In one embodiment, the total number of impinging flow channels 26 on the nozzle 2 is odd. One impinging flow channel 26 is arranged on the axis M, and all the other impinging flow channels 26 are symmetrically distributed on both sides of the axis M. In this way, it can ensure that the atomizing medium flowing out of the impinging flow channel 26 arranged on the axis M can also collide with the atomizing medium flowing out of other impinging flow channels 26 in the impinging area to atomize and form an aerosol, improving the atomization efficiency and effect.

[0068] Among them, the impinging flow channel 26 arranged on the axis M mainly collides with other jets in the last-stage impinging area to form an aerosol. When the number of impinging flow channels 26 is even (2n), the impinging flow channels 26 are respectively arranged on both sides of the axis M, that is, no impinging flow channel 26 is arranged on the axis M.

[0069] Among them, the counter-flow channels 26 located on the axis M can also be arranged axially symmetrically with respect to the axis M.

[0070] The width of the counter-flow channels 26 is approximately equal to 1 μm and less than or equal to 30 μm, such as 1 μm, 5 μm, 10 μm, 15 μm, 20 μm, 30 μm, etc. And / or, the depths of the diversion cavity 23, the inlet 24, and the outlet 25 in the Y direction are all approximately equal to 3 μm and less than or equal to 100 μm, such as 3 μm, 10 μm, 20 μm, 30 μm, 60 μm, 100 μm, etc. Among them, when the depths of the diversion cavity 23, the inlet 24, and the outlet 25 in the Y direction are the same, it is convenient for the production of the nozzle 2, reduces the production cost, and improves the efficiency.

[0071] In one embodiment, the inlet 24 and the outlet 25 are respectively located on opposite sides of the diversion cavity 23; the number of inlets 24 is single or multiple.

[0072] In one embodiment, the diversion cavity 23, the inlet 24, and the outlet 25 are all axially symmetric structures.

[0073] The inventors of the present application have found through research that if parameters such as the size and spacing of each counter-flow channel 26 are reasonably controlled, such as the number of counter-flow channels 26, the width of the counter-flow channels 26, the collision angle α, etc., the energy utilization efficiency can be improved through multi-stage collision, thereby improving the atomization effect.

[0074] As Figure 6 and Figure 7 shown, Figure 6 is the jet collision diagram of the nozzle in the related art; Figure 7 is the jet collision diagram of the nozzle provided in one embodiment of the present application Figure 1 shown. The present application also conducts an experimental comparison between the nozzle in the related art and the nozzle 2 provided in the embodiment of the present application.

[0075] As Figure 8 and Figure 9 , are the simulation diagrams of the aerosol morphology when the hydraulic pressures at the inlets of the first test piece are 24 Mpa and 48 Mpa respectively; Figure 10 is the simulation diagram of the aerosol morphology when the hydraulic pressure at the inlet of the second test piece is 24 Mpa. Among them, Figure 8 (a) is the plane section diagram of the first test piece with Y = 0, Figure 8 (b) is the plane section diagram of the first test piece with X = 0, Figure 8 (c) is the plane section diagram of the first test piece from the top to 5 mm at the outlet. Figure 9 (a) is the plane section diagram of the first test piece with Y = 0, Figure 9 (b) is the plane section diagram of the first test piece with X = 0, Figure 9(c) is a planar sectional view from the top of the first experimental piece to 5 mm from the outlet; Figure 10 (a) is a planar sectional view of the second experimental piece with Y equal to zero, Figure 10 (b) is a planar sectional view of the second experimental piece with X equal to zero, Figure 10 (c) is a planar sectional view from the top of the second experimental piece to 5 mm from the outlet.

[0076] The nozzle in the related art only includes two impinging flow channels and has a first-stage impinging zone, denoted as the first experimental piece. The nozzle 2 provided in the embodiment of the present application includes four impinging flow channels 26. The four impinging flow channels 26 have three impinging zones. Among them, there are two first-stage impinging zones 263 and one second-stage impinging zone 264, denoted as the second experimental piece. Test conditions: When the hydraulic pressure at the inlet 24 of the nozzle 2 is 24 Mpa and 48 Mpa respectively, according to the laboratory standard test equipment. The test results are as Figures 8 - 10 and shown in Table 1.

[0077] Table 1 shows the flow rates of the first experimental piece and the second experimental piece under different pressures.

[0078]

[0079] As can be seen from Table 1 above, compared with the nozzle provided in the related art, the nozzle 2 provided in the embodiment of the present application has a larger liquid flow rate under the same pressure. In this way, it can effectively achieve a high flow rate of the nozzle 2 and ensure that the pressure is within a certain range, solving the problem of a large pressure under a high flow rate. From the comparison Figure 8 and Figure 10 it can be seen that the angle of the atomization angle θ of the nozzle 2 provided in the embodiment of the present application is smaller; thus, the risk of the atomization medium remaining near the outlet of the atomization device of the nozzle 2 can be effectively reduced, the waste of the atomization medium can be reduced, and the probability of the atomization medium entering the user's lungs can be increased.

[0080] In summary, through multi-stage impingement, the energy utilization rate can be improved and the atomization effect can be enhanced. At the same time, by adjusting the flow resistance of each impinging flow channel 26 (that is, by adjusting the width of the impinging flow channel 26 at the outlet 25, the number of impinging flow channels 26, the angle of the impinging angle α, etc.), the atomization angle θ can be effectively reduced, thereby reducing the residue of the atomization medium and improving the utilization rate of the atomization medium.

[0081] In another embodiment, refer to Figure 11 and Figure 12 , Figure 11 is a perspective view of the nozzle provided in another embodiment of the present application in the Y direction; Figure 12 is Figure 11Schematic cross-sectional view of the nozzle at the fluid outlet. The outlet 25 of the nozzle 2 includes a confinement channel 27 and a plurality of impinging channels 26. The structure and function of the plurality of impinging channels 26 are as described above. The diversion cavity 23 communicates with the confinement channel 27 through the impinging channels 26, and at least one impinging zone of the multi-stage impinging zones of the plurality of impinging channels 26 is located within the confinement channel 27. Thus, the jets impinging in the multi-stage impinging zones via the impinging channels 26, at least part of the jets impinging in the multi-stage impinging zones, will interfere with the side wall of the confinement channel 27 within the confinement channel 27, so as to limit, through the side wall of the confinement channel 27, the plume shape of the aerosol formed by the atomization of the atomizing medium from deforming in the direction perpendicular to the plane of the impinging zone when the jets impinge, thereby reducing the atomization angle θ, reducing the risk of the atomizing medium staying due to impinging on other structures of the atomizing device, improving the utilization rate of the atomizing medium, and ensuring the atomization effect. The plane of the impinging zone is the Figure 1 plane where Y = 0 of the shown nozzle 2.

[0082] The width of the diversion cavity 23 is greater than the width of the confinement channel 27. Thus, the space of the diversion cavity 23 can accommodate sufficient atomizing medium to form impingement at the impinging channels 26 at the outlet 25.

[0083] In some embodiments, such as Figure 12 , all of the multi-stage impinging zones of the plurality of impinging channels 26 are located within the confinement channel 27. Thus, the confinement channel 27 can limit the deformation of the plume shape of the aerosol formed by the atomization of the atomizing medium in the direction perpendicular to the impinging surface (Y = 0) during impingement, so as to reduce the atomization angle θ and reduce the risk of the atomizing medium staying due to impinging on other structures at the outlet of the atomizing device.

[0084] In some embodiments, such as Figure 12 . The last impinging zone of the multi-stage impinging zones is tangent to the liquid outlet port of the confinement channel 27 away from the impinging channels 26. The last impinging zone refers to the region where the liquids ejected from the plurality of impinging channels 26 collide for the last time. Tangency may mean that the side of the last impinging zone facing away from the diversion cavity 23 is tangent to the liquid outlet port of the confinement channel 27 away from the impinging channels 26.

[0085] In some embodiments, such as Figure 12, the restricted flow channel 27 is a single flow channel, that is, the number of restricted flow channels 27 is one, and the number of impinging flow channels 26 is four; the extending paths of the four impinging flow channels 26 are all linear, and the liquid outlet ports of the four impinging flow channels 26 are flush; the extension lines of the outer sides of the four impinging flow channels 26 converge at the liquid outlet port of the restricted flow channel 27. In this way, the jets passing through the impinging flow channels 26 collide at the liquid outlet port of the restricted flow channel 27. When the side wall of the restricted flow channel 27 interferes with the moment of jet collision, the plume shape of the aerosol formed by atomizing the atomizing medium is deformed in the direction perpendicular to the plane of the collision area, reducing the atomization angle θ, reducing the risk of the atomizing medium staying due to hitting other structures of the atomizing device, improving the utilization rate of the atomizing medium, and ensuring the atomization effect.

[0086] In some embodiments, such as Figure 13 , Figure 13 is a partial schematic view of the first substrate provided by another embodiment of the present application. The height M1 of the restricted flow channel 27 is greater than or equal to the height M2 of the impinging flow channel 26. Preferably, the height M1 of the restricted flow channel 27 is the same as the height M2 of the impinging flow channel 26, so that the restricted flow channel 27 and the impinging flow channel 26 can be formed by the same process and the same mask, reducing the production process cost and production steps of the nozzle 2. At the same time, the jet after collision in the restricted flow channel 27 is also more likely to interfere with the side wall of the restricted flow channel 27 to reduce the atomization angle θ.

[0087] In some embodiments, such as Figure 6 , the width W1 of the restricted flow channel 27 is greater than or equal to the distance W2 between the outer sides of the liquid outlet ports of the two outermost impinging flow channels 26. In this way, the interference between the jet and the side wall of the nozzle 2 in the X = 0 direction can be reduced, the influence on the atomization effect can be reduced, and the atomization effect can be ensured.

[0088] In some embodiments, the restricted flow channel 27 is of a constricted type, an expanded type or a parallel type. In practical applications, the angle of the atomizing jet can be adjusted by changing the shape of the restricted flow channel 27 to achieve the required application effect.

[0089] The present application provides a nozzle 2, which has a diversion cavity 23; the side wall of the diversion cavity 23 has an inlet 24 and an outlet 25; wherein, the outlet 25 includes at least four impinging flow channels 26; the at least four impinging flow channels 26 have multiple impinging zones. In this way, the atomizing medium enters through the inlet 24 by hydraulic pressure, and after flowing through the entire diversion cavity 23, the liquid will flow out through the outlet 25. In practical applications, depending on the pressure applied to the atomizing medium, the atomizing medium will be ejected through the outlet 25 at a certain ejection speed. The atomizing medium in the diversion cavity 23 is ejected from the diversion cavity 23 through at least four impinging flow channels 26 respectively, and converges in the impinging zone. Among them, two jets impinge on each other in the first-stage impinging zone 263, and the other two jets also impinge on each other in the first-stage impinging zone 263 at the same time. The atomizing medium forms at least two jets when impinging at the first-stage impinging zone 263 formed by at least four impinging flow channels 26, and the at least two jets after impingement impinge on each other in the second-stage impinging zone 264... and so on in a cycle, so as to utilize the kinetic energy of the jets to achieve the fragmentation of the liquid column to form an aerosol. Multiple impingements can make full use of the initial kinetic energy of the jets to improve the energy utilization efficiency, thereby improving the atomization effect of the nozzle 2. At the same time, although the formed aerosol will interfere with the side wall of the confinement flow channel 27, it does not significantly reduce the fog output, that is, there is no large amount of atomizing medium remaining in the confinement flow channel 27.

[0090] The above is only the implementation mode of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of the present application by the same token.

Claims

1. A nozzle, characterized in that, The nozzle has a diversion cavity; the side wall of the diversion cavity has an inlet and an outlet; wherein, the outlet includes at least four impinging flow channels; the at least four impinging flow channels have multiple impinging zones.

2. The nozzle according to claim 1, characterized in that, The nozzle has an axis, the at least four impinging flow channels are distributed on both sides of the axis, and all the impinging flow channels on the same side of the axis have a first impinging zone, so that the first jets flowing out of all the impinging flow channels on the same side of the axis collide with each other in the first impinging zone and then converge into a second jet; the at least four impinging flow channels also have a second impinging zone, so that the second jets formed after converging on both sides of the axis collide with each other in the second impinging zone and then converge into a third jet.

3. The nozzle according to claim 2, characterized in that, Among all the impinging flow channels on the same side of the axis, the injection angle of the impinging flow channels gradually decreases in the direction away from the axis.

4. The nozzle according to claim 3, characterized in that, Among all the impinging flow channels on the same side of the axis, the injection angle of the impinging flow channel closest to the axis is less than 75°; the injection angle of the impinging flow channel farthest from the axis is greater than 30°.

5. The nozzle according to claim 3, characterized in that, Among all the impinging flow channels on the same side of the axis, the width of the impinging flow channels gradually decreases in the direction away from the axis.

6. The nozzle according to claim 5, characterized in that, The width of the impinging flow channels is greater than or equal to 4 μm and less than or equal to 20 μm.

7. The nozzle according to claim 3, characterized in that, The at least four impinging flow channels are arranged axially symmetrically with respect to the axis; and the extension lines of two impinging flow channels arranged axially symmetrically with respect to the axis intersect on the axis; the second impinging zone is located on the axis.

8. The nozzle according to claim 1, characterized in that, The nozzle has an axis, the total number of the at least four impinging flow channels is odd, one of the impinging flow channels is arranged on the axis, and all the other impinging flow channels are symmetrically distributed on both sides of the axis.

9. The nozzle according to any one of claims 1 - 8, characterized in that, The outlet further includes a constraint flow channel; the diversion cavity is communicated with the constraint flow channel through the impinging flow channels, and at least one impinging zone in the multiple impinging zones is located in the constraint flow channel.

10. The nozzle according to claim 9, characterized in that, All the multiple impinging zones are located in the constraint flow channel.

11. The nozzle according to claim 10, characterized in that, The last impinging zone of the multiple impinging zones is tangent to the liquid outlet port of the constraint flow channel away from the impinging flow channels.

12. The nozzle according to claim 9, characterized in that, The height of the constraint flow channel is greater than or equal to the height of the impinging flow channels.

13. The nozzle according to claim 9, characterized in that, The width of the constraint flow channel is greater than or equal to the distance between the outer side surfaces of the liquid outlet ports of the two outermost impinging flow channels.

14. An atomization device, characterized in that, Including the nozzle according to any one of claims 1-13.

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