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 flow guide 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 a constraint flow channel and a plurality of collision flow channels; the flow guide cavity is communicated with the constraint flow channel through the collision flow channels, and at least part of the collision areas of the multiple collision flow channels are located in the constraint flow channel. Thus, when the atomizing medium passes through the multiple collision flow channels and at least part of the atomizing medium collides with the constraint flow channel, the constraint flow channel can limit deformation of the atomizing medium during collision, so that the atomizing angle is reduced, the risk that the atomizing medium is detained due to the fact that the atomizing medium collides with other structures is reduced, the utilization rate of the atomizing medium is increased, and the influence on the atomizing effect is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of soft 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 ejection 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 existing high-pressure microfluidic nozzles, the atomization angle is relatively large, and the atomization medium is likely to impact other structures at the nozzle outlet, resulting in the retention of the atomization medium and a low utilization rate of the atomization medium. Summary of the Invention

[0004] The nozzle and the atomization device provided in this application aim to solve the problem in the related art that the atomization angle of the nozzle is relatively large, the atomization medium is likely to impact other structures at the nozzle outlet, resulting in the retention of the atomization medium and a low utilization rate of the atomization medium.

[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 a constraint flow channel and a plurality of counter-flow channels; the diversion cavity is communicated with the constraint flow channel through the counter-flow channels, and at least a part of the collision area of the plurality of counter-flow channels is located in the constraint flow channel.

[0006] In one embodiment, the entire collision area of the plurality of counter-flow channels is located in the constraint flow channel.

[0007] In one embodiment, the distance between the outermost collision area of the plurality of counter-flow channels and the liquid outlet port of the constraint flow channel away from the counter-flow channels is less than 1.5 μm.

[0008] In one embodiment, the plurality of counter-flow channels have the same collision area, and the collision area is tangent to the liquid outlet port of the constraint flow channel away from the counter-flow channels.

[0009] In one embodiment, the constraint flow channel is a single flow channel, and the number of the counter-flow channels is two; both of the two counter-flow channels are linear, and the liquid outlet ports of the two counter-flow channels are flush; the extension lines of the outer sides of the two counter-flow channels converge at the liquid outlet port of the constraint flow channel.

[0010] In one embodiment, the depth of the constraint flow channel is greater than or equal to the depth of the counter-flow channel.

[0011] In one embodiment, the width of the constraint channel is greater than or equal to the distance between the outer sides of the liquid outlet ports of the two outermost counter-flow channels.

[0012] In one embodiment, the constraint channel is a single channel, and the number of the counter-flow channels is two; the width of the constraint channel is greater than or equal to twice the distance between the outer sides of the liquid outlet ports of the two counter-flow channels.

[0013] In one embodiment, the width of the counter-flow channel is greater than or equal to 1 μm and less than or equal to 30 μm; and / or, the depths of the diversion cavity, the inlet, and the outlet are all greater than or equal to 3 μm and less than or equal to 100 μm.

[0014] To solve the above technical problems, the second technical solution provided by this application is: to provide an atomization device including the nozzle described above.

[0015] Beneficial effects of this application: Different from the prior art, this application provides a nozzle which has a diversion cavity; the side wall of the diversion cavity has an inlet and an outlet; the atomization medium enters the nozzle from the inlet and is ejected from the outlet through the diversion cavity. Among them, the outlet includes a constraint channel and a plurality of counter-flow channels; the diversion cavity is communicated with the constraint channel through the counter-flow channels, and at least part of the collision area of the plurality of counter-flow channels is located in the constraint channel. In this way, when the atomization medium passes through the plurality of counter-flow channels and collides at least partially in the constraint channel, the constraint channel can constrain the deformation of the atomization medium during the collision, so as to reduce the atomization angle, reduce the risk that the atomization medium impacts other structures of the atomization device and the atomization medium stays on the atomization device, improve the utilization rate of the atomization medium, and reduce the influence on the atomization effect. Description of the Drawings

[0016] Figure 1 is a schematic diagram of the overall structure of the nozzle provided by an embodiment of this application;

[0017] Figure 2 is a disassembled schematic diagram of the nozzle provided by an embodiment of this application;

[0018] Figure 3 is a perspective view of the nozzle provided by an embodiment of this application in the Y direction;

[0019] Figure 4 is Figure 2 the enlarged view at P in

[0020] Figure 5 is a schematic cross-sectional view of the nozzle provided by an embodiment of this application at the fluid outlet in the transverse direction;

[0021] Figure 6 is a schematic diagram of the positional relationship between the collision area and the constraint channel provided by another embodiment of this application;

[0022] Figure 7 It is a schematic cross-sectional view of the nozzle provided by another embodiment of the present application at the fluid outlet;

[0023] Figure 8 It is a simulation diagram of the aerosol morphology when the hydraulic pressure at the inlet of the first test piece is 24 Mpa;

[0024] Figure 9 It is a simulation diagram of the aerosol morphology when the hydraulic pressure at the inlet of the second test piece is 24 Mpa.

[0025] Explanation of the reference numerals in the drawings:

[0026] 2 - nozzle; 21 - first substrate; 211 - groove structure; 2111 - diversion groove; 2112 - collision groove; 2113 - constraint groove; 2114 - notch; 22 - second substrate; 23 - diversion cavity; 24 - inlet; 25 - outlet; 26 - collision flow channel; 261 - collision area; 27 - constraint flow channel. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with 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. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0028] The terms "first", "second", and "third" in the present application are only for descriptive purposes and cannot be understood 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 clearly and 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 drawings). If the specific posture changes, the directional indications will also change accordingly. In addition, the terms "include" and "have" 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 optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products, or devices.

[0029] References to "embodiments" in this specification mean that specific features, structures, or characteristics described in connection with the embodiments can 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 each time, 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 can be combined with other embodiments.

[0030] 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 for inhaled drug delivery, as the atomization flow rate increases, the atomization angle will continuously increase. An overly large atomization angle will cause the atomization medium to impact the outlet structure of the nozzle and interfere with other structures near the outlet structure 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. Herein, the atomization angle refers to a cone formed by the atomized liquid ejected from the nozzle and expanding around the axis of the nozzle, and its cone apex angle is the atomization angle of the liquid nozzle.

[0031] Based on this, the embodiments of the present application provide a nozzle, which effectively improves the atomization effect of the nozzle, reduces the atomization angle, and reduces the residue of the atomization medium.

[0032] The present application provides an atomization device. The atomization device is used to atomize the provided atomization medium to form an aerosol for a user to inhale. The atomization device can be used in fields such as medical atomization, recreational inhalation, and beauty atomization. The atomization medium can include a liquid matrix, such as oils added with aroma components, liquid medicines, etc.

[0033] The device includes a nozzle 2, and the nozzle 2 forms an aerosol by means of 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.

[0034] 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 an exploded view of the nozzle provided by an embodiment of the present application; Figure 3This is a perspective view of the nozzle in 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. The diversion cavity 23 has 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 is working, the atomizing medium flows into the diversion cavity 23 from the inlet 24 and flows out of the diversion cavity 23 through the outlet 25.

[0035] In one embodiment, as Figure 2 , the nozzle 2 includes a first substrate 21 and a second substrate 22. The first substrate 21 and the second substrate 22 each have a mounting side, and they can be connected to each other to mount 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.

[0036] 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 groove 2111. The diversion groove 2111 is recessed downward by a certain depth in a direction away from the second substrate 22. In some embodiments, the depth of the diversion groove 2111 is less than the thickness of the first substrate 21. In other embodiments, the depth of the diversion groove 2111 can be equal to the thickness of the first substrate 21, that is, the diversion groove 2111 penetrates through the first substrate 21; in this case, the nozzle 2 can further include a third substrate, and the second substrate 22 and the third substrate respectively enclose the diversion groove 2111 from both sides of the first substrate 21.

[0037] Combined with Figures 2-4 , Figure 4 is Figure 2Enlarged view at position P in the figure. The flow guiding groove 2111 has opposite first side wall and second side wall. The first side wall has a constraint groove 2113 and a plurality of collision grooves 2112, and the second side wall has a plurality of notches 2114. The flow guiding groove 2111 communicates with the constraint groove 2113 through the collision grooves 2112, and the port of the constraint groove 2113 far from the collision groove 2112 extends to the edge of the first substrate 21. The second substrate 22 covers the flow guiding groove 2111, the collision grooves 2112, the constraint groove 2113 and the notches 2114 respectively, so as to form a flow guiding cavity 23, a collision flow channel 26, a constraint flow channel 27 and an inlet 24 respectively. The flow guiding cavity 23 communicates with the constraint flow channel 27 through the collision flow channel 26, and the flow guiding 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 can be separated from each other by a partition column therebetween. The partition column makes the atomizing medium flowing into the flow guiding cavity 23 form multiple beams of jet streams, so as to play a certain role in anti-blocking and filtering.

[0038] 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., can also be provided in the flow guiding cavity 23. On the one hand, the filter structure helps to reduce the impurity particles in the atomizing medium from further flowing to the outlet 25 and blocking the outlet 25, and on the other hand, it also helps to further divide the jet streams in the flow guiding cavity 23. Wherein, downstream of the inlet 24 refers to other positions on the nozzle 2 that the atomizing medium passes through after flowing through the inlet 24 along the flow path of the atomizing medium in the nozzle 2.

[0039] Combined Figure 3 and Figure 5 , Figure 5 is a schematic cross-sectional view of the nozzle provided by an embodiment of the present application at the fluid outlet. The outlet 25 includes a constraint flow channel 27 and a plurality of collision flow channels 26; the flow guiding cavity 23 communicates with the constraint flow channel 27 through the collision flow channels 26, and at least part of the collision area 261 of the plurality of collision flow channels 26 is located in the constraint flow channel 27. Thus, after the atomizing medium passes through the inlet 24, it reaches the flow guiding cavity 23 of the nozzle 2. The plurality of collision flow channels 26 of the outlet 25 divide the atomizing medium into multiple columns of jet streams, and each column of jet stream will pass through the collision area 261 and collide, so that the jet stream splits into droplets. By means of collision, it is beneficial to further improve the atomization effect and reduce the median particle size. At the same time, at least part of the jet streams colliding in the collision area 261 via the collision flow channels 26 will interfere with the side wall of the constraint flow channel 27 in the constraint flow channel 27, so as to limit the plume shape of the aerosol formed by atomizing the atomizing medium when the jet streams collide through the side wall of the constraint flow channel 27 and deform in the direction perpendicular to the plane of the collision area 261, thereby reducing the atomization angle θ, reducing the risk of retention of the atomizing medium when the atomizing medium impacts other structures of the atomizing device, improving the utilization rate of the atomizing medium, and ensuring the atomization effect. The plane of the collision area 261 isFigure 1 The nozzle 2 shown is in the plane where Y=0. The flow guiding cavity 23 should be as wide as possible, and the width of the flow guiding cavity 23 is greater than the width of the constraint flow channel 27. In this way, the space of the flow guiding cavity 23 accommodates enough atomized medium, forming pressure to collide with the collision flow channel 26 of the outlet 25. A large-angle contraction section is passed near the outlet 25, so that the contraction section will be shorter, which is conducive to reducing flow resistance.

[0040] In some embodiments, Figure 5 , all of the collision areas 261 of the plurality of collision flow channels 26 are located in the constraint flow channel 27. In this way, the constraint flow channel 27 can limit the deformation of the plume shape of the aerosol formed by the atomization medium during the collision in the direction perpendicular to the collision surface (Y=0), thereby reducing the atomization angle θ and reducing the risk of atomization medium being retained due to the aerosol hitting other structures at the outlet of the atomization device.

[0041] In some embodiments, in combination Figure 5 , the distance L0 between the outermost collision zone 261 of the plurality of collision channels 26 and the liquid outlet port of the constraint channel 27 away from the collision channel 26 is less than 1.5 μm. In this way, it can be ensured that the constraint channel 27 will not block the atomization path of the nozzle 2, reduce the risk of aerosol being ejected onto the side wall of the constraint channel 27, and facilitate the normal ejection of aerosol. It can be understood that each channel has at least two opposite ports, and the atomized medium flows into the corresponding channel from one of the ports and flows out of the channel through the other port. The port corresponding to the current channel from which the atomized medium flows out is called the liquid outlet port.

[0042] In some embodiments, Figure 6 , Figure 6 2 is a schematic diagram of the positional relationship between the collision zone and the constraint flow channel provided by another embodiment of the present application. Multiple collision flow channels 26 have the same collision zone 261, and the collision zone 261 is tangent to the liquid outlet port of the constraint flow channel 27 away from the collision flow channel 26. That is, multiple collision flow channels 26 collide in the same area, which is located in the constraint flow channel 27, and the area can be tangent to the liquid outlet port of the constraint flow channel 27 away from the collision flow channel 26 on the side away from the guide cavity 23.

[0043] In some embodiments, Figure 6, the constrained flow channel 27 is a single flow channel, that is, the number of constrained flow channels 27 is one, and the number of impinging flow channels 26 is two; the extending paths of the two impinging flow channels 26 are both linear, and the liquid outlet ports of the two impinging flow channels 26 are flush; the extension lines of the outer sides of the two impinging flow channels 26 converge at the liquid outlet port of the constrained flow channel 27. In this way, the jets passing through the impinging flow channels 26 collide at the liquid outlet port of the constrained flow channel 27. When the side wall of the constrained 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 impinging zone 261, 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. Among them, the liquid outlet port of the impinging flow channel 26 refers to the port at one end of the impinging flow channel 26 away from the diversion cavity 23. The liquid outlet port of the constrained flow channel 27 refers to the port at one end of the constrained flow channel 27 away from the impinging flow channel 26, which corresponds to the edge of the first substrate 21.

[0044] In some embodiments, please refer back to Figure 4 , the depth H1 of the constrained flow channel 27 is greater than or equal to the depth H2 of the impinging flow channel 26. Preferably, the depth H1 of the constrained flow channel 27 is the same as the depth H2 of the impinging flow channel 26; in this way, the constrained flow channel 27 and the impinging flow channel 26 can be formed using 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 constrained flow channel 27 is also more likely to interfere with the side wall of the constrained flow channel 27 to reduce the atomization angle θ.

[0045] In some embodiments, such as Figure 7 , Figure 7 is a schematic cross-sectional view of the nozzle provided by another embodiment of the present application at the fluid outlet. The width W1 of the constrained 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 Y = 0 plane can be reduced, the influence on the atomization effect can be reduced, and the atomization effect can be ensured. In some specific embodiments, the distance W2 between the outer sides of the liquid outlet ports of the two impinging flow channels 26 can be 20 μm to 80 μm; for example, W2 can be 20 μm, 25 μm, 30 μm, 50 μm, 60 μm, 80 μm, etc. The included angle θ1 between the liquid outlet directions of the two impinging flow channels 26 can be 60 to 150 degrees; preferably 90 degrees. Similarly, the available range of the length L of the constrained flow channel 27 can be obtained, that is, L = L0+(0.5*W2) / tan(0.5*θ1).

[0046] In some embodiments, the constrained flow channel 27 is a single flow channel, and the number of impinging flow channels 26 is two; the width of the constrained flow channel 27 is greater than or equal to twice the distance between the outer sides of the liquid outlet ports of the two impinging flow channels 26.

[0047] As described above, the atomization medium enters through the hydraulic pressure from the inlet 24. 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 atomization medium, the atomization medium will be ejected through the outlet 25 at a certain shooting speed. The atomization medium in the diversion cavity 23 forms multiple columns of jets and shoots out of the diversion cavity 23 through a plurality of counter-flow channels 26 respectively, and converges and collides in the collision area 261. The multiple columns of jets collide in the collision area 261, and the kinetic energy of the jets is used to break the liquid column to form an aerosol. Among them, by arranging a constraint flow channel 27 and a plurality of counter-flow channels 26 at the outlet 25 of the nozzle 2, at least part of the collision area 261 of the plurality of counter-flow channels 26 is located within the constraint flow channel 27. In this way, when the atomization medium passes through the plurality of counter-flow channels 26 and collides at least partially in the constraint flow channel 27, the plume shape of the aerosol formed by the atomization of the atomization medium will interfere with the side wall of the constraint flow channel 27. The side wall of the constraint flow channel 27 can limit the deformation of the atomization medium in the direction perpendicular to the plane of the collision area 261 during the collision, thereby reducing the atomization angle θ, reducing the risk of the aerosol hitting other structures of the atomization device and causing the atomization medium to remain on the atomization device, improving the utilization rate of the atomization medium, and ensuring the atomization effect.

[0048] In some embodiments, the constraint flow channel 27 is of a contraction type, an expansion type or a parallel type. In practical applications, the angle of the atomization jet can be adjusted by changing the shape of the constraint flow channel 27 to achieve the required application effect.

[0049] In some embodiments, such as Figure 7 , the width W3 of the counter-flow channel 26 is greater than or equal to 1 μm and less than or equal to 30 μm. For example, W3 can be 1 μm, 5 μm, 10 μm, 15 μm, 20 μm, 30 μm, etc. In this way, it can ensure that the atomization medium flowing out of the counter-flow channel 26 has a certain kinetic energy to collide with each other to achieve atomization, and can reduce the risk of the atomization angle θ being too large due to a large atomization flow rate.

[0050] The depth H2 of the counter-flow channel 26 can be greater than or 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. Preferably, the depth H2 of the counter-flow channel 26 can be greater than or equal to 5 μm and less than or equal to 10 μm; such as 5 μm, 6 μm, 7 μm, 8 μm or 9 μm. In some embodiments, the depths of the diversion cavity 23, the inlet 24, the counter-flow channel 26 and the constraint flow channel 27 can be the same; this facilitates the production of the nozzle 2, reduces the production cost and improves the efficiency. The depth refers to the dimension along the Y direction. Of course, in other embodiments, the depths of the diversion cavity 23, the inlet 24, the counter-flow channel 26 and the constraint flow channel 27 can also be different.

[0051] In some embodiments, the inlet 24 and the outlet 25 are respectively located on opposite sides of the diversion cavity 23, and the number of inlets 24 is single or multiple.

[0052] In some embodiments, the diversion cavity 23, the inlet 24 and the outlet 25 are all of symmetrical structure.

[0053] This application also conducts an experimental comparison between the nozzle in the related art and the nozzle 2 provided in the embodiments of this application.

[0054] Such as Figure 8 and Figure 9 , Figure 8 is the simulation diagram of the aerosol morphology when the hydraulic pressure at the inlet of the first test piece is 24 Mpa; Figure 9 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 sectional view of the first test piece with Y being zero, Figure 8 (b) is the plane sectional view of the first test piece with X being zero, Figure 8 (c) is the plane sectional view of the first test piece from the top to 1 cm at the outlet. Figure 9 (a) is the plane sectional view of the second test piece with Y being zero, Figure 9 (b) is the plane sectional view of the second test piece with X being zero, Figure 9 (c) is the plane sectional view of the second test piece from the top to 1 cm at the outlet 25. Among them, the X and Y axes are the same as the X and Y axes in Figure 2 .

[0055] The nozzle in the related art does not include the constraint flow channel 27, which is denoted as the first test piece. The nozzle 2 provided in the embodiments of this application includes the constraint flow channel 27, which is denoted as the second test piece. Test conditions: When the hydraulic pressure at the inlet 24 of the nozzle 2 is 24 Mpa, according to the laboratory standard test equipment. The test results are as shown in Figures 8-9 .

[0056] Comparing Figure 8 and Figure 9 in the plane sectional view of the aerosol at X = 0, it can be seen that for the nozzle 2 provided in the embodiments of this application, the angle of the atomization angle θ is significantly reduced; this is beneficial to reducing the risk of the atomization medium remaining on other appliances of the atomization device, reducing the waste of the atomization medium, and increasing the probability of the atomization medium entering the user's lungs, that is, improving the utilization rate of the atomization medium.

[0057] In summary, by providing the constraint flow channel 27 at the outlet 25 of the nozzle 2 to restrict the deformation of the atomization medium in the vertical plane of the collision area 261, the atomization angle θ can be effectively reduced, so that the nozzle 2 still has a small atomization angle θ under high-flow conditions, improving the circular shape of the atomization section, thereby reducing the residue of the atomization medium and increasing the utilization rate of the atomization medium.

[0058] 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; the atomization medium enters the nozzle 2 from the inlet 24 and is ejected from the outlet 25 through the diversion cavity 23. Among them, the outlet 25 includes a constraint flow channel 27 and a plurality of impinging flow channels 26; the diversion cavity 23 is communicated with the constraint flow channel 27 through the impinging flow channels 26, and at least part of the impinging area 261 of the plurality of impinging flow channels 26 is located in the constraint flow channel 27. Thus, the atomization medium enters from the inlet 24 through 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 atomization medium, the atomization medium will be ejected through the outlet 25 at a certain shooting speed. The atomization medium in the diversion cavity 23 forms multiple columns of jets and ejects from the diversion cavity 23 through the plurality of impinging flow channels 26, and converges and impinges in the impinging area 261. The multiple columns of jets impinge in the impinging area 261, and the kinetic energy of the jets is used to break the liquid column to form an aerosol. Among them, by providing a constraint flow channel 27 and a plurality of impinging flow channels 26 at the outlet 25 of the nozzle 2, at least part of the impinging area 261 of the plurality of impinging flow channels 26 is located in the constraint flow channel 27. Thus, when the atomization medium passes through the plurality of impinging flow channels 26 and at least partially impinges in the constraint flow channel 27, the plume shape of the aerosol formed by the atomization of the atomization medium will interfere with the side wall of the constraint flow channel 27, and the side wall of the constraint flow channel 27 can limit the deformation of the atomization medium in the direction perpendicular to the plane of the impinging area 261 during impingement, thereby reducing the atomization angle θ, reducing the risk that the aerosol impacts other structures of the atomization device and the atomization medium stays on the atomization device, improving the utilization rate of the atomization medium, and ensuring the atomization effect. At the same time, although the formed aerosol will interfere with the side wall of the constraint flow channel 27, it does not significantly reduce the fog output, that is, there is no large amount of atomization medium remaining in the constraint flow channel 27.

[0059] The above is only the implementation mode of the present application, and it 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 a constraint flow channel and a plurality of impinging flow channels; the diversion cavity is communicated with the constraint flow channel through the impinging flow channels, and at least part of the impinging area of the plurality of impinging flow channels is located in the constraint flow channel.

2. The nozzle according to claim 1, characterized in that, All of the impinging areas of the plurality of impinging flow channels are located in the constraint flow channel.

3. The nozzle according to claim 2, characterized in that, The distance between the outermost impinging area of the plurality of impinging flow channels and the liquid outlet port of the constraint flow channel away from the impinging flow channels is less than 1.5 μm.

4. The nozzle according to claim 3, characterized in that, The plurality of impinging flow channels have the same impinging area, and the impinging area is tangent to the liquid outlet port of the constraint flow channel away from the impinging flow channels.

5. The nozzle according to claim 4, characterized in that, The constraint flow channel is a single flow channel, and the number of the impinging flow channels is two; both of the two impinging flow channels are linear, and the liquid outlet ports of the two impinging flow channels are flush; the extension lines of the outer sides of the two impinging flow channels converge at the liquid outlet port of the constraint flow channel.

6. The nozzle according to claim 1, characterized in that, The depth of the constraint flow channel is greater than or equal to the depth of the impinging flow channel.

7. The nozzle according to claim 1, characterized in that, The width of the constraint flow channel is greater than or equal to the distance between the outer sides of the liquid outlet ports of the outermost two impinging flow channels.

8. The nozzle according to claim 7, characterized in that, The constraint flow channel is a single flow channel, and the number of the impinging flow channels is two; the width of the constraint flow channel is greater than or equal to twice the distance between the outer sides of the liquid outlet ports of the two impinging flow channels.

9. The nozzle according to any one of claims 1-8, characterized in that, The width of the impinging flow channel is greater than or equal to 1 μm and less than or equal to 30 μm; and / or, the depths of the diversion cavity, the inlet and the outlet are all greater than or equal to 3 μm and less than or equal to 100 μm.

10. An atomization device, characterized in that, Including the nozzle according to any one of claims 1-9.

Images