Nozzle device and cooling tower

Abstract

The present disclosure relates to a nozzle device and a cooling tower. The nozzle device comprises a shell, a spiral blade and a water dispersing element. The shell comprises a water inlet section, a vortex generating section and a water outlet section arranged in sequence in the height direction. The spiral blade is fixedly arranged on the inner wall of the vortex generating section, and forms a spiral flow channel in the vortex generating section. The spiral blade is used to make the cooling water entering from the water inlet section flow along the spiral flow channel to form a vortex. The water dispersing element is arranged on the lower side of the shell, and is used to disperse the cooling water discharged from the water outlet section. The spiral flow channel is formed by the fixedly arranged spiral blade, the flow path of the water flow in the shell is changed from direct falling to layer-by-layer rotating flow along the spiral flow channel, the water flow obtains radial kinetic energy, and is less affected by water pressure fluctuations, thereby improving the stability of large-scale spraying. The rotating water curtain can be further refined and diffused by the water dispersing element, and small and dense water droplets can be sprayed in a large range, thereby improving the uniform spraying in a large range.

Description

Technical Field

[0001] This disclosure relates to the field of cooling tower technology, and more particularly to a nozzle device and a cooling tower. Background Technology

[0002] The function of the spray heads in the cooling tower's water distribution pan is to evenly distribute cooling water into the packing material below the pan, achieving heat exchange between water and air. Improving the performance of the spray heads directly affects the performance of the cooling tower. Current spray heads cannot achieve stable, wide-area spraying effectively, and this technical problem urgently needs improvement. Utility Model Content

[0003] This application provides a nozzle device and a cooling tower to improve the stability of the large-area spraying of the nozzle device.

[0004] The first aspect of this disclosure provides a nozzle device, comprising:

[0005] The shell includes an inlet section for water intake, a vortex generating section for generating vortices, and an outlet section for discharging water, arranged sequentially in the height direction.

[0006] Helical blades are fixedly installed on the inner wall of the vortex generating section, forming a helical flow channel within the vortex generating section. The helical blades are used to cause the cooling water entering from the inlet section to flow along the helical flow channel, forming a vortex; and

[0007] The water diffuser is located on the lower side of the housing and is used to disperse the cooling water discharged from the outlet section.

[0008] In some embodiments, the outer edges of the helical blades are connected to the inner wall of the vortex generating section.

[0009] In some embodiments, the vortex generating section is a cylindrical structure, and the radial dimension of the helical blades in the vortex generating section is smaller than the radius of the vortex generating section so that the helical blades form a core gap in the axial region of the vortex generating section. A portion of the cooling water flows along the helical channel, and another portion of the cooling water falls through the core gap.

[0010] In some embodiments, the thickness of the helical blades gradually decreases in the direction close to the core gap.

[0011] In some embodiments, the helical blades are configured such that the helical angle of the helical flow channel is greater than or equal to 10° and less than or equal to 35°.

[0012] In some embodiments, the water diffuser includes an inner ring water diffuser and an outer ring water diffuser, the outer ring water diffuser being located radially outside the inner ring water diffuser, and an annular gap being formed between the outer ring water diffuser and the inner ring water diffuser.

[0013] In some embodiments, the outer ring water diffuser includes a first disk and a plurality of outer diversion teeth. The central region of the first disk has a through hole, the inner ring water diffuser is disposed at the through hole, and the plurality of outer diversion teeth are spaced apart on the surface of the first disk.

[0014] In some embodiments, the tooth tip of the portion of the external diverter tooth away from the through hole has a serrated structure; and / or, the tooth tip of the portion of the external diverter tooth near the through hole has a blade-like structure.

[0015] In some embodiments, the inner ring water diffuser includes a plurality of inner diversion teeth and a second disk, with the plurality of inner diversion teeth being spaced apart on the surface of the second disk.

[0016] In some embodiments, the tooth tip of the portion of the inner diverter tooth near the outer ring water diffuser has a serrated structure; and / or, the tooth tip of the portion of the inner diverter tooth away from the outer ring water diffuser has a blade-like structure.

[0017] In some embodiments, the inner and outer ring water diffusers each have a plurality of toothed structures spaced apart in the circumferential direction, with the inner ring water diffuser having a greater number of toothed structures than the outer ring water diffuser.

[0018] In some embodiments, the water outlet section has a cylindrical structure and the end of the water outlet section near the water diffuser is flared.

[0019] In some embodiments, the diameter of the water outlet section first decreases and then increases from one end of the water outlet section away from the water diffuser to the other end of the water outlet section.

[0020] In some embodiments, the housing includes a plurality of slots disposed in the water inlet section, the plurality of slots penetrating the housing wall of the water inlet section.

[0021] In some embodiments, the water inlet section is a cylindrical structure, and the plurality of slots include a plurality of first slots extending along the axial direction of the water inlet section and a plurality of second slots extending along the circumferential direction of the water inlet section, wherein the first slots and the second slots are spaced apart in the axial direction of the water inlet section.

[0022] A second aspect of this application provides a cooling tower including a nozzle device as described above and an air duct assembly.

[0023] Based on the technical solution provided in this application, the nozzle device includes a housing, spiral blades, and a water distributor. The housing includes an inlet section for water intake, a vortex generating section for generating vortices, and an outlet section for water discharge, arranged sequentially in the height direction. The spiral blades are fixedly disposed on the inner wall of the vortex generating section, forming a spiral flow channel within the vortex generating section. The spiral blades are used to cause the cooling water entering from the inlet section to flow along the spiral flow channel to form a vortex. The water distributor is disposed on the lower side of the housing and is used to disperse the cooling water discharged from the outlet section. Instead of relying on rotating components to increase centrifugal force, a spiral flow channel is formed by fixed spiral blades, changing the flow path of water within the shell. The water is transformed from a direct drop to a layer-by-layer rotating flow along the spiral channel, giving the water radial kinetic energy. It is also less affected by water pressure fluctuations. Even in the case of unstable water pressure, the cooling water entering the shell still needs to flow along the spiral channel, thus achieving an effective conversion of gravitational potential energy into radial kinetic energy, forming a rotating water curtain. This improves the stability of the spray nozzle device over a wide area. The rotating water curtain can also be further refined and diffused by the water distribution components, spraying fine and dense water droplets over a large area, improving the uniformity of spraying over a wide area. Attached Figure Description

[0024] The accompanying drawings, which are included to provide a further understanding of this disclosure and form part of this disclosure, illustrate exemplary embodiments of the present disclosure and are used to explain the disclosure, but do not constitute an undue limitation of the disclosure. In the drawings:

[0025] Figure 1 This is a schematic diagram of the overall structure of the nozzle device in some embodiments of this disclosure.

[0026] Figure 2 for Figure 1 Cross-sectional view.

[0027] Figure 3 This is a cross-sectional view of the water inlet section of a nozzle device according to some embodiments of this disclosure.

[0028] Figure 4 This is a top view of the water distribution component of a nozzle device according to some embodiments of this disclosure.

[0029] Figure 5 This is a perspective view of the water distribution component of a nozzle device according to some embodiments of the present disclosure.

[0030] Figure 6 This is a cross-sectional view of the water distribution component of a nozzle device according to some embodiments of this disclosure.

[0031] Figure 7 This is a perspective view of the external flow-diverting teeth of the nozzle device according to some embodiments of this disclosure.

[0032] Figure 8This is a perspective view of the internal flow-diverting teeth of the nozzle device according to some embodiments of this disclosure.

[0033] Explanation of reference numerals in the attached figures

[0034] 1. Shell; 11. Inlet section; 12. Vortex generation section; 13. Outlet section; 14. First hole; 15. Second hole;

[0035] 2. Spiral blades;

[0036] 3. Water distribution component; 31. First disc; 32. Outer diversion teeth; 33. Through hole; 34. Inner diversion teeth; 35. Second disc;

[0037] 4. Chuck;

[0038] 5. Supporting ribs. Detailed Implementation

[0039] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are in no way intended to limit the present disclosure or its application or use. The present disclosure may be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that the present disclosure will be thorough and complete, and will fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless specifically stated otherwise, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0040] The terms "first," "second," and similar words used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "contains" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "above," "below," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, this relative positional relationship may also change accordingly.

[0041] In this disclosure, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may be not directly connected to the other devices but have an intermediary device.

[0042] All terms used in this disclosure (including technical or scientific terms) have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as a dictionary, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0043] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0044] Based on the embodiments disclosed above, in the absence of explicit denial or conflict, the technical features of one embodiment may be advantageously combined with one or more other embodiments.

[0045] The inventors discovered through research that the common method for expanding the spray range of cooling water is to provide centrifugal force to the cooling water during its flow, creating a rotating water curtain. To achieve this, a rotating component is typically incorporated into the spray head. The rotating component is rotated by the impact of the falling cooling water, thus providing centrifugal force and expanding the spray range. However, this method requires a certain water pressure. For example, when the water pressure is relatively stable, the falling speed of the cooling water also remains within a stable range, resulting in a stable impact force on the rotating component. Therefore, the rotating component rotates at a relatively stable speed, and the force exerted on the water flow is also relatively stable, resulting in a relatively stable spray range. However, when the water pressure fluctuates significantly, the impact force on the rotating component changes considerably, leading to significant variations in the spray range and preventing the achievement of a stable, large-area spray. Furthermore, this technique of expanding the spray range using a rotating component also suffers from high frictional losses and high maintenance costs.

[0046] To overcome these shortcomings, refer to Figures 1-3 This application provides a nozzle device, comprising:

[0047] The housing 1 includes an inlet section 11 for water intake, a vortex generating section 12 for generating vortices, and an outlet section 13 for discharging water, which are arranged sequentially in the height direction.

[0048] The spiral blade 2 is fixedly installed on the inner wall of the vortex generating section 12. The spiral blade 2 forms a spiral flow channel within the vortex generating section 12, and is used to cause the cooling water entering from the inlet section 11 to flow along the spiral flow channel to form a vortex; and

[0049] The water diffuser 3 is located on the lower side of the housing 1 and is used to disperse the cooling water discharged from the water outlet section 13.

[0050] Specifically, the shell 1 extends roughly vertically, and the spiral blades 2 extend radially from the inner wall of the vortex generating section 12 towards its center. In other words, the spiral blades 2 fill most of the cross-section of the vortex generating section 12. When the cooling water entering the shell 1 falls under gravity, it flows layer by layer along the surface of the spiral blades 2 towards their ends. During this process, some of the water's gravitational potential energy is converted into radial kinetic energy, giving the water a certain radial velocity as it flows out from the ends of the spiral blades 2, forming a rotating water curtain and thus increasing the spray range of the cooling water. Furthermore, the rotating water curtain collides with the water diffuser 3 during its descent, causing splashing at the diffuser 3 and rupturing the water film to form uniform and fine droplets, enhancing the uniform water distribution effect and expanding the spray range.

[0051] In this embodiment, instead of relying on rotating components to increase centrifugal force, a spiral flow channel is formed by fixed spiral blades 2, changing the flow path of water within the shell 1 from direct falling to a layer-by-layer rotating flow along the spiral flow channel. This allows the water to gain radial kinetic energy and is less affected by water pressure fluctuations. Even in the case of unstable water pressure, the cooling water entering the shell 1 still needs to flow along the spiral flow channel, thus achieving an effective conversion of gravitational potential energy into radial kinetic energy, forming a rotating water curtain. This improves the stability of the large-area spraying of the nozzle device. The rotating water curtain can also be further refined and diffused by the water distribution component 3, spraying fine and dense water droplets over a large area, improving the uniformity of the large-area spraying.

[0052] Furthermore, it is worth noting that since there is also a water outlet section 13 on the lower side of the flow generation section 12, and the end of the spiral channel does not extend to the water outlet section, the rotating water curtain flowing out from the spiral channel will also collide with the inner wall of the water outlet section 13 to form splash, which to some extent increases the uniform water distribution effect and the spray range.

[0053] In some embodiments, the outer edges of the helical blades 2 are all connected to the inner wall of the vortex generating section 12.

[0054] Specifically, the spiral blade 2 is a single integrally formed structural component and is constructed in a spiral shape. The entire outer edge of the spiral blade 2 along its extension path is connected to the inner wall of the vortex generating section 12. This ensures that there is no gap between the spiral blade 2 and the inner wall of the vortex generating section 12. In other words, when the water flows along the spiral channel, it will not overflow from the outer edge of the spiral channel, thereby concentrating the water flow within the spiral channel, enhancing the effect of the spiral blade 2 on the water flow, increasing the radial kinetic energy of the water flow, and thus improving the spray range.

[0055] In some embodiments, the helical blade 2 is constructed as a plurality of sector-shaped elements, each of which is sector-shaped in cross-section. The plurality of sector-shaped elements are arranged at intervals in the vertical direction. Adjacent sector-shaped elements are offset at a certain angle in the circumferential direction, and adjacent sector-shaped elements overlap end-to-end in the circumferential direction. It is understood that this can also form a helical flow channel. Unlike the helical flow channel constructed from a single helical blade in the above embodiments, in this embodiment, the helical flow channel is discontinuous. When water flows out at the end of one sector-shaped element, it needs to fall a certain distance in the vertical direction before contacting the beginning of the adjacent next-layer sector-shaped element, thus flowing in a layer-by-layer rotating manner, allowing the water to gain radial kinetic energy flow and forming a rotating water curtain.

[0056] refer to Figure 2 In some embodiments, the vortex generating section 12 has a cylindrical structure. The radial dimension of the helical blade 2 in the vortex generating section 12 is smaller than the radius of the vortex generating section 12 so that the helical blade 2 forms a core gap in the axial region of the vortex generating section 12. A portion of the cooling water flows along the helical channel, and another portion of the cooling water falls through the core gap.

[0057] Specifically, the core gap of the spiral channel is not filled, but rather left unfilled, allowing most of the cooling water to flow along the spiral channel while a small portion falls directly down the core gap. The advantage of this design is that the small portion of water, as it falls through the core gap, is driven by the water flowing along the spiral channel, gaining radial kinetic energy and forming a small vortex. Furthermore, this portion of water gains greater vertical kinetic energy than the water flowing along the spiral channel, allowing for more efficient use of gravitational potential energy to impact the water distribution component 3, thus enhancing the uniform water distribution effect.

[0058] In some embodiments, the thickness of the helical blade 2 gradually decreases in the direction close to the core gap.

[0059] Understandably, the edge of the helical blade 2 near the core gap is constructed in a shape similar to a cutting edge. This reduces the friction on the water flow falling along the core gap and promotes the formation of a stable vortex in the water flow at the core gap.

[0060] In some embodiments, the helical blade 2 is configured such that the helical angle of the helical flow channel is greater than or equal to 10° and less than or equal to 35°.

[0061] Specifically, the helical inclination angle needs to be constructed within a reasonable range to balance the kinetic energy of the water flow in the vertical and radial directions. If the inclination angle is too large, it means the helical flow channel is too steep, which will result in excessive vertical kinetic energy and insufficient radial kinetic energy, making it impossible to obtain a large spray range. If the inclination angle is too small, the opposite effect will be achieved, resulting in insufficient uniform water distribution. Therefore, a helical inclination angle greater than or equal to 10° and less than or equal to 35° can achieve a better uniform water distribution effect and a larger spray range.

[0062] In some embodiments, the helical blade 2 is configured such that the helical angle of the helical flow channel is greater than or equal to 15° and less than or equal to 30° to obtain better results.

[0063] In some embodiments, the helical blade 2 is configured such that the helix angle of the helical flow channel is 25° for better results.

[0064] refer to Figure 4 In some embodiments, the water distribution element 3 includes an inner ring water distribution element and an outer ring water distribution element, the outer ring water distribution element is located radially outside the inner ring water distribution element, and there is an annular gap between the outer ring water distribution element and the inner ring water distribution element.

[0065] Specifically, the water distribution element 3 is constructed as a double-ring structure. The inner ring water distribution element is mainly used to disperse the water curtain near the core gap, while the outer ring water distribution element is mainly used to disperse the more dispersed water curtain on the periphery. Furthermore, as the rotating water curtain flowing out of the outlet section 13 moves towards the water distribution element 3, the water curtain corresponding to the position of the annular gap can pass directly through it, while the remaining water curtain will collide with the inner and outer ring water distribution elements and splash, thus enhancing the uniformity of water distribution.

[0066] In some embodiments, the outer ring water diffuser includes a first disk 31 and a plurality of outer diverter teeth 32. The central region of the first disk 31 has a through hole 33. The inner ring water diffuser is disposed at the through hole 33. The plurality of outer diverter teeth 32 are spaced apart on the surface of the first disk 31.

[0067] Specifically, from the inner edge of the first disk 31 (near the through hole 33) to the outer edge of the first disk 31 (away from the through hole 33), the height of the first disk 31 gradually decreases. In other words, the surface of the first disk 31 is inclined, which helps water droplets on the surface of the first disk 31 to drip down along the inclined surface. The outer diversion teeth 32 are evenly spaced in the circumferential direction. The outer diversion teeth 32 can cut the outer water curtain into small water droplets, enhancing the uniform water distribution effect.

[0068] refer to Figure 7 In some embodiments, the tip of the outer diverting tooth 32 near the through hole 33 has a blade-like structure. This blade-like structure allows the water curtain to be cut, forming numerous fan-shaped water curtains covering different radii.

[0069] In some embodiments, the portion of the external diverting tooth 32 away from the through hole 33 has a serrated tooth tip. The serrated structure promotes the rupture of the water film, forming small water droplets. In particular, in embodiments where both a serrated and blade-like structure are provided, the serrated structure can further cut the fan-shaped water curtain into smaller droplets, enhancing the uniform water distribution effect.

[0070] refer to Figure 4 and 5 In some embodiments, the inner ring water diffuser includes a plurality of inner diversion teeth 34 and a second disk 35, with the plurality of inner diversion teeth 34 spaced apart on the surface of the second disk 35.

[0071] The first disk 31, the second disk 35, and the through hole 33 are arranged coaxially, and the size of the second disk 35 is smaller than the size of the through hole 33. This ensures that the size of the annular gap formed by the first disk 31 and the second disk 35 is uniform in the entire circumferential direction, thereby ensuring the uniformity of drainage in all directions. Furthermore, the water curtain discharged from the outlet section 13 can be roughly divided into three parts radially from the inside to the outside: an inner water curtain, a middle water curtain, and an outer water curtain. The inner water curtain roughly corresponds to the position of the second disc 35 on the falling path. This part of the water flows onto the second disc 35, and a portion of it is also cut and dispersed by multiple inner diverting teeth 34, thus forming small and dispersed water droplets on the surface of the second disc 35. This part of the water droplets flows through the annular gap between two adjacent inner diverting teeth 34 and falls through the annular gap. The middle water curtain roughly corresponds to the position of the annular gap on the falling path. This part of the water can directly pass through the annular gap and fall. The outer water curtain roughly corresponds to the first disc 31 on the falling path. This part of the water falls onto the first disc 31 and falls along the inclined surface of the first disc 31. In this process, a portion of the inner ring water curtain falls onto the second disc 35 or directly onto the inner diverter tooth 34, where it will splash. These splashed water droplets will bounce onto the first disc 31 and flow down along the inclined surface of the first disc 31. The inner ring water distribution component and the outer ring water distribution component work together to achieve a better uniform water distribution effect.

[0072] As a feasible alternative, in some embodiments, the second disc 35 in the inner ring water diffuser is replaced by an annular bracket. The ends of the multiple inner diverter teeth 34 near the outer ring water diffuser are connected and fixed by the annular bracket. Unlike the above embodiments, in this embodiment, the bottom of the area between adjacent inner diverter teeth 34 is not filled by structural components, but is open in the direction of water flow. This allows the inner ring water curtain to be cut and dispersed by the inner diverter teeth 34 and fall directly through the gaps between adjacent inner diverter teeth 34, instead of being guided to the annular gap and then falling from the annular gap. This improves the smoothness of water flow through the inner ring water diffuser, and this solution can increase the drainage volume in the central area and enhance the versatility of the sprinkler device's water distribution effect to suit the working needs of different working scenarios.

[0073] refer to Figure 8 In some embodiments, the tip of the inner diverter tooth 34, located away from the outer ring water diffuser, has a blade-like structure. This blade-like structure can cut the water curtain located in the core gap into numerous fan-shaped water curtains covering different radii.

[0074] In some embodiments, the tip of the inner diverting tooth 34 near the outer ring water diffuser has a serrated structure. The serrated structure promotes the rupture of the water film, forming small water droplets. In particular, in embodiments where both a serrated and blade-like structure are provided, the serrated structure can further cut the fan-shaped water curtain into smaller droplets, enhancing the uniform water distribution effect.

[0075] In some embodiments, the number of inner diversion teeth 34 is greater than the number of outer diversion teeth 32.

[0076] Both the inner and outer diversion teeth 34 are evenly spaced in the circumferential direction. This means the angle between two adjacent inner diversion teeth 34 in the circumferential direction is smaller than the angle between two adjacent outer diversion teeth 32. The gap between two adjacent diversion teeth forms a fan-shaped flow window. For ease of description, the area between two adjacent inner diversion teeth 34 is called the inner ring window, and the area between two adjacent outer diversion teeth 32 is called the outer ring window. The angle of the inner ring window is defined as the angle between two adjacent inner diversion teeth 34 in the circumferential direction, and the angle of the outer ring window is defined as the angle between two adjacent outer diversion teeth 32 in the circumferential direction. The smaller the window angle, the denser the diversion teeth are arranged, and the smaller the gap between them, resulting in more cuts to the water flow. However, a too-dense and close arrangement can cause the water droplets generated from cutting the water curtain to re-aggregate. Furthermore, it is necessary to provide a channel for the water droplets generated from cutting the water curtain to drain away. Therefore, a suitable window angle needs to be set to ensure that the water curtain is sufficiently cut and dispersed while also providing enough channel for the generated water droplets.

[0077] Therefore, in order to achieve a better water distribution effect, in some embodiments, the angle of the outer ring window is made larger than that of the inner ring window. This is because in addition to allowing water to pass through the outer ring water diffuser itself, the outer ring window also allows some water droplets splashed by the inner ring water diffuser to flow and drip along the inclined surface of the first disk 31, thereby ensuring the smooth drainage of the outer ring window.

[0078] In some embodiments, the angle of the inner window is configured to be 10° to 20°, and the angle of the outer window is 15° to 20° to achieve a better water distribution effect. Advantageously, the angle of the inner window is configured to be 10°, and the angle of the outer window is configured to be 17°.

[0079] In some embodiments, the inner diversion tooth 34 is configured to be 8 mm high, and the outer diversion tooth is configured to be 4 mm high. That is, the inner ring of the water diffuser 3 is higher than the outer ring, so that the water can flow smoothly through the outer ring after passing through the inner ring.

[0080] refer to Figure 2 and 5 In some embodiments, the nozzle device further includes a support rib 5. The upper end of the support rib 5 is fixedly connected to the outer wall of the housing 1, and the lower part of the support rib 5 is fixedly connected to the inner ring water diffuser and the outer ring water diffuser. This stabilizes the water diffuser 3 as a whole on the lower side of the housing 1, reduces the shaking caused by water flow impacting the water diffuser 3, and improves the stability of water distribution.

[0081] In some embodiments, the support rib 5 is an L-shaped member, comprising a first arm and a second arm. The first arm is fixedly connected to the outer wall of the housing 1. The second arm connects to the first arm at the outer edge of the first disk 31 and extends toward the central region of the first disk 31. Figure 4 As shown, from a top-down view, the second arm obstructs a portion of the annular gap between the outer and inner ring water diffusers. This arrangement improves the stability of the water diffuser 3. To reduce the interference of the second arm on the water flow, the width of the second arm is constructed to be less than or equal to 2 mm.

[0082] refer to Figures 4-6 In some embodiments, a snap-fit ​​6 is also included. Specifically, both the first disc 31 and the second disc 35 are fixed to the support rib 5 by the snap-fit ​​6, thereby further improving the stability of the water distribution component 3.

[0083] refer to Figure 2 In some embodiments, the water outlet section 13 has a cylindrical structure and the end of the water outlet section 13 near the water diffuser 3 is flared.

[0084] With this configuration, the water flow discharged from the spiral channel has radial kinetic energy, which allows the water flow to diffuse along the inner wall of the flared section. The Bernoulli effect is used to convert centrifugal force into radial kinetic energy, thus promoting the formation of a rotating water curtain.

[0085] refer to Figure 2 In some embodiments, the diameter of the water outlet section 13 first decreases and then increases from one end of the water outlet section 13 away from the water diffuser 3 to the other end of the water outlet section 13.

[0086] In this embodiment, the water outlet section includes a converging section and a expanding section. The upper end of the converging section is connected to the vortex generating section 12, and the lower end of the converging section is connected to the upper end of the expanding section. The diameter of the converging section gradually decreases from its upper end to its lower end, while the diameter of the expanding section gradually increases from its upper end to its lower end.

[0087] The water flow discharged from the spiral channel is first affected by the converging section. As the diameter of the converging section gradually decreases, the flow velocity increases and the centrifugal force of the rotating water curtain is enhanced when the water flows along the inner wall of the converging section. Subsequently, in the expanding section, based on the Bernoulli effect, the centrifugal force is converted into radial diffusion kinetic energy, causing the water flow to form a uniformly rotating water curtain.

[0088] To achieve better diffusion, in some embodiments, the shrinkage ratio of the tapered section (i.e., the ratio of the diameter of the lower end of the tapered section to the diameter of the upper end of the tapered section) is 1:3.

[0089] To achieve better diffusion, in some embodiments, the expansion angle of the diffuser section is 60°. The expansion angle of the diffuser section is defined as the angle between the tangent at the lower end of the diffuser section and the end face where the lower end of the diffuser section is located. When the nozzle device is arranged vertically, that is, when the axis of the vortex generating section 12 is parallel to the direction of gravity, the end face where the lower end of the diffuser section is located is a horizontal plane.

[0090] refer to Figures 1-2 In some embodiments, the housing 1 includes a plurality of slots disposed in the water inlet section 11, the plurality of slots penetrating the housing wall of the water inlet section 11.

[0091] Specifically, the nozzle device is used to cooperate with the water distribution plate. The water distribution plate is roughly a box structure with mounting holes at the bottom. The diameter of the mounting holes is adapted to the size of the water inlet section 11. The water inlet section 11 of the housing 1 is located in the water distribution plate, while the vortex generating section 12 and the water outlet section 13 are located outside the water distribution plate. When the cooling water in the water distribution plate accumulates to the height of the slot, the cooling water can enter the water inlet section 11 through the slot, thus achieving water intake.

[0092] refer to Figure 3 In some embodiments, the inlet section 11 has a cylindrical structure. The plurality of slots include a plurality of first slots 14 extending along the axial direction of the inlet section 11 and a plurality of second slots 15 extending along the circumferential direction of the inlet section 11. The first slots 14 and second slots 15 are spaced apart along the axial direction of the inlet section 11.

[0093] Specifically, the axial direction of the water inlet section 11 is parallel to the vertical direction, and multiple first holes 14 are evenly distributed in the circumferential direction to increase the water inlet area, so that water can enter from multiple positions in the circumferential direction of the water inlet section 11. Furthermore, by separating the first holes 14 and the second holes 15 in the vertical direction, the number of holes used for water inlet can be different when the water level in the water distribution plate is different, thereby achieving better flow control of the nozzle.

[0094] In some embodiments, multiple second holes 15 are located at different heights in the vertical direction to achieve different water inflow rates. For example, when the water level in the distribution pan is low, water can only enter through the lower second hole 15, resulting in a lower water flow rate from the sprinkler head. When the water level in the distribution pan is high, water can enter through second holes 15 at different heights, thereby increasing the sprinkler head flow rate.

[0095] In some embodiments, the first orifice 14 is configured to be higher than the second orifice 15 to achieve better flow regulation.

[0096] refer to Figures 1-3 In some embodiments, the nozzle assembly further includes a chuck 4. The chuck 4 is disposed on the outer wall of the housing 1 and located at the junction of the water inlet section 11 and the vortex generating section 12. The chuck 4 is fixedly connected to the housing 1, and the size of the chuck 4 is larger than the diameter of the mounting hole at the bottom of the water distribution plate. When the nozzle assembly is installed on the water distribution plate, the chuck 4 is located inside the water distribution plate. The chuck 4 can effectively block the mounting hole, reducing the amount of water flowing out of the gap in the mounting hole, thus ensuring that the water in the water distribution plate can only be discharged through the slots on the water inlet section 11. The chuck 4 also serves to support and stabilize the housing 1, improving the stability of the nozzle assembly installed on the water distribution plate.

[0097] Finally, it is worth emphasizing that none of the nozzle devices provided in the various embodiments of this application contain rotating parts, yet they can still achieve stable, large-area spraying, thus improving the service life of the nozzles and reducing maintenance costs.

[0098] This application also provides a cooling tower including the nozzle device described above. Based on this cooling tower, a wider and more uniform spraying effect on the packing material can be improved, thereby enhancing the performance of the cooling tower.

[0099] The duct assembly, indoor air conditioning unit, and air conditioning unit provided in this disclosure have been described in detail above. Specific embodiments have been used to illustrate the principles and implementation methods of this disclosure. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core ideas of this disclosure. It should be noted that those skilled in the art can make various improvements and modifications to this disclosure without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this disclosure.

Claims

1. A showerhead apparatus, comprising: include: The shell (1) includes an inlet section (11) for water intake, a vortex generating section (12) for generating vortices and an outlet section (13) for discharging water, arranged sequentially in the height direction. The spiral blade (2) is fixedly disposed on the inner wall of the vortex generating section (12). The spiral blade (2) forms a spiral flow channel in the vortex generating section (12). The spiral blade (2) is used to make the cooling water entering from the water inlet section (11) flow along the spiral flow channel to form a vortex. as well as A water diffuser (3) is disposed on the lower side of the housing (1) and is used to disperse the cooling water discharged from the outlet section (13).

2. The showerhead assembly of claim 1, wherein, The outer edges of the spiral blades (2) are all connected to the inner wall of the vortex generating section (12).

3. The showerhead apparatus of claim 1, wherein The vortex generating section (12) is a cylindrical structure. The radial dimension of the spiral blade (2) of the vortex generating section (12) is smaller than the radius of the vortex generating section (12) so that the spiral blade (2) forms a core gap in the axial region of the vortex generating section (12). A portion of the cooling water flows along the spiral channel, and another portion of the cooling water falls through the core gap.

4. The showerhead apparatus of claim 3, wherein, The thickness of the helical blade (2) gradually decreases in the direction close to the core gap.

5. The showerhead assembly of claim 1, wherein, The helical blade (2) is configured such that the helical angle of the helical flow channel is greater than or equal to 10° and less than or equal to 35°.

6. The showerhead assembly of claim 1, wherein, The water distribution component (3) includes an inner ring water distribution component and an outer ring water distribution component. The outer ring water distribution component is located radially outside the inner ring water distribution component, and there is an annular gap between the outer ring water distribution component and the inner ring water distribution component.

7. The showerhead assembly of claim 6, wherein, The outer ring water distribution component includes a first disc (31) and a plurality of outer diversion teeth (32). The central region of the first disc (31) has a through hole (33). The inner ring water distribution component is disposed at the through hole (33). The plurality of outer diversion teeth (32) are distributed at intervals on the surface of the first disc (31).

8. The showerhead assembly of claim 7, wherein, The portion of the external diverting tooth (32) away from the through hole (33) has a serrated tooth tip; and / or, the portion of the external diverting tooth (32) near the through hole (33) has a blade-like tooth tip.

9. The showerhead assembly of claim 6, wherein, The inner ring water distribution component includes a plurality of inner diversion teeth (34) and a second disk (35), with the plurality of inner diversion teeth (34) spaced apart on the surface of the second disk (35).

10. The showerhead assembly of claim 9, wherein, The portion of the inner diverter tooth (34) near the outer ring water diffuser has a serrated tooth tip; and / or, the portion of the inner diverter tooth (34) away from the outer ring water diffuser has a blade-like tooth tip.

11. The showerhead assembly of claim 6, wherein, The inner ring water diffuser and the outer ring water diffuser each have multiple tooth-like structures spaced apart in the circumferential direction, and the number of tooth-like structures in the inner ring water diffuser is greater than the number of tooth-like structures in the outer ring water diffuser.

12. The showerhead assembly of any of claims 1-11, wherein, The water outlet section (13) has a cylindrical structure and the end of the water outlet section (13) near the water diffuser (3) is flared.

13. The showerhead assembly of claim 2, wherein, From one end of the water outlet section (13) away from the water diffuser (3) to the other end of the water outlet section (13), the diameter of the water outlet section (13) first decreases and then increases.

14. The showerhead assembly of any of claims 1-11, wherein, The housing (1) includes a plurality of slots disposed in the water inlet section (11), the plurality of slots penetrating the housing wall of the water inlet section (11).

15. The showerhead assembly of claim 14, wherein, The water inlet section (11) has a cylindrical structure, and the plurality of the slots include a plurality of first slots (14) extending along the axial direction of the water inlet section (11) and a plurality of second slots (15) extending along the circumferential direction of the water inlet section (11). The first slots (14) and the second slots (15) are spaced apart in the axial direction of the water inlet section (11).

16. A cooling tower characterized by, Includes the nozzle device as described in any one of claims 1 to 15.

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