A multi-scroll ventilation system

Abstract

The present application belongs to the technical field of ventilation equipment, and relates to a multi-vortex ventilation system, which comprises at least one vortex ventilation unit, each vortex ventilation unit comprising an exhaust assembly, an orifice plate assembly and at least one angular momentum air supply assembly. The orifice plate assembly is arranged directly below the exhaust assembly, and comprises a plate body. The angular momentum air supply assembly is arranged between the exhaust assembly and the orifice plate assembly, and comprises a plurality of air supply devices. The plurality of air supply devices are uniformly distributed along the circumference of the orifice plate assembly. The air supply direction of each air supply device forms a preset horizontal deflection angle with the perpendicular line connecting the center of the air supply device and the vertical center line of the orifice plate assembly, and the air supply direction of each air supply device forms a preset elevation angle with the horizontal plane where the air supply device is located. The scheme of the present application can effectively pull and transport water mist, has good overall water mist removal effect, and has strong control ability for large-area dispersed water mist.

Description

Technical Field

[0001] This invention belongs to the field of ventilation equipment technology and relates to a multi-vortex ventilation system. Background Technology

[0002] In environments where moisture dissipation is the primary concern, such as industrial plants, processes generate large amounts of hot, humid air, which forms a widely dispersed water mist within the space. Ventilation systems are typically used to regulate the indoor environment, ensuring the stable operation of production equipment and the safety of workers. As one of the most common environmental control methods in industrial plants, ventilation systems primarily dilute and remove humid air and water mist by organizing the exchange of indoor and outdoor air.

[0003] To address the problem of widespread water mist in high-humidity industrial plants, existing technologies typically employ mechanical ventilation. Specifically, multiple exhaust fans are installed on the roof or in elevated areas of the plant. The negative pressure flow generated by these fans draws humid air and water mist out of the plant.

[0004] However, the flow velocity in this type of confluence flow field decreases rapidly with distance, and the negative pressure control range is limited. At the same time, since water mist lacks significant upward momentum after generation, has a high density and a wide diffusion range, the negative pressure confluence formed by roof exhaust alone is insufficient to effectively traction and transport water mist within the plant, resulting in poor overall water mist removal and limited control over large-scale diffused water mist. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-vortex ventilation system to solve the technical problems of existing ventilation systems having difficulty in effectively traction and transporting water mist, poor overall water mist removal effect, and limited control capability for large-scale diffuse water mist.

[0006] To achieve the above objectives, the specific technical solution provided by the present invention is as follows: A multi-vortex ventilation system includes at least one vortex ventilation unit. Each vortex ventilation unit includes an exhaust assembly, an orifice plate assembly, and at least one angular momentum air supply assembly. The orifice plate assembly is located directly below the exhaust assembly and includes a plate body with a non-perforated area in the center and an open area surrounding the non-perforated area. The angular momentum air supply assembly is located between the exhaust assembly and the orifice plate assembly and includes multiple air supply devices. The multiple air supply devices are evenly distributed around the circumference of the orifice plate assembly. The air supply direction of each air supply device forms a preset horizontal deflection angle with the vertical line connecting the center of the air supply device and the vertical center line of the orifice plate assembly, and the air supply direction of each air supply device forms a preset elevation angle with the horizontal plane where the air supply device is located, so that the humid and hot air forms an upward vortex airflow after flowing through the orifice plate assembly.

[0007] Furthermore, the air supply device includes an air supply bracket, a condensate tray, an air supply fan, and a demisting mechanism. The air supply fan is mounted on the air supply bracket. The demisting mechanism includes a demisting cylinder located at the outlet of the air supply fan and multiple bending plates. The multiple bending plates are parallel to the axial direction of the demisting cylinder and are located inside the demisting cylinder, forming a tortuous airflow channel between adjacent bending plates. The condensate tray is connected to the demisting cylinder and is used to receive condensate from inside the demisting cylinder.

[0008] Furthermore, the air supply device also includes a flow equalization mechanism connected to the outlet of the demisting mechanism. The flow equalization mechanism includes a flow equalization cylinder, a honeycomb plate, and two layers of screens. The honeycomb plate and the two layers of screens are arranged sequentially along the axial direction of the flow equalization cylinder, and the honeycomb plate is located at one end close to the demisting mechanism.

[0009] Furthermore, the air supply bracket includes a mounting frame, a pitch adjustment mechanism, a horizontal deflection angle adjustment mechanism, and a height adjustment mechanism. The air supply fan is mounted on the mounting frame via the pitch adjustment mechanism, which is used to adjust the pitch angle of the air supply fan. The horizontal deflection angle adjustment mechanism and the height adjustment mechanism are used to adjust the horizontal deflection angle and height of the mounting frame and the air supply fan.

[0010] Furthermore, the pitch adjustment mechanism includes a connecting beam, a first support plate, a second support plate, a connector, and an adjusting component. The connecting beam is located at the bottom of the mounting frame. The first support plate and the second support plate are located at the bottom of the blower along the axial direction of the blower. The first support plate is connected to the connecting beam via the adjusting component, and the second support plate is connected to the connecting beam via the connector. The first support plate is located at one end of the outlet of the blower. The adjusting component includes an adjusting bolt, a fixing nut that mates with the adjusting bolt, and two adjusting nuts. The adjusting bolt passes upward sequentially through the bottom of the connecting beam and the first support plate. The fixing nut is located on the upper side of the connecting beam, and the two adjusting nuts are located on the upper and lower sides of the bottom of the first support plate, respectively. The connecting component includes a detachable bolt and a detachable nut that mates with the detachable bolt. The detachable bolt passes upward sequentially through the bottom of the connecting beam and the second support plate, and the detachable nut is located on the upper side of the bottom of the second support plate.

[0011] Furthermore, the height adjustment mechanism includes a height-adjustable nut and a height-adjustable lead screw that cooperates with the height-adjustable nut. The height-adjustable nut is fixedly installed, and the lower end of the height-adjustable lead screw is connected to the top of the mounting frame through the horizontal deflection angle adjustment mechanism. The horizontal deflection angle adjustment mechanism includes a rotating cylinder, a locking nut, and a locking bolt that cooperates with the locking nut; the rotating cylinder is coaxially sleeved on the lower end of the height adjusting screw and can rotate relative to the height adjusting screw; the rotating cylinder is connected to the top of the mounting frame; a through hole is provided on the peripheral wall of the rotating cylinder, and the locking nut is located in the through hole; the locking bolt is used to pass through the through hole and tighten the height adjusting screw.

[0012] Furthermore, the plate body has multiple air passages in the opening area, and the multiple air passages are arranged in a matrix; the shape of the air passages is rectangular, circular, rhomboid or regular polygonal; the opening ratio of the opening area is 20% to 40%.

[0013] Furthermore, the perforated plate assembly also includes multiple lifting legs and omnidirectional pulleys located at the bottom of the lifting legs; the lifting legs are located at the bottom of the plate body.

[0014] Furthermore, each of the vortex ventilation units includes two angular momentum air supply components, which are arranged vertically, with the lower angular momentum air supply component being arranged at the same height as the orifice plate component.

[0015] Furthermore, there are multiple vortex ventilation units, and the preset horizontal deflection angles of the corresponding air supply devices in two adjacent vortex ventilation units are complementary to form two vortex airflows in opposite directions; the polygon formed by multiple air supply devices in each vortex ventilation unit has a side length of L, and the distance between two adjacent vortex ventilation units is 0.2L to L.

[0016] The multi-vortex ventilation system of the present invention has the following advantages: When the multi-vortex ventilation system of this invention is in operation, the exhaust assembly is activated, forming a stable upward negative pressure flow field at the top of the plant. Multiple air supply devices simultaneously supply air, with the airflow delivered to the area where the perforated plate assembly is located at a preset horizontal deflection angle and a preset elevation angle. The airflow then rotates and converges above the perforated plate assembly, forming an initial rotational vortex. Under the coupling effect of the negative pressure convergence at the top, the initial rotational vortex at the bottom, and the boundary constraints of the perforated plate assembly, a columnar vortex airflow gradually forms, rotating around the central axis of the exhaust assembly. This vortex airflow exhibits continuous upward motion in the axial direction and a negative pressure gradient from the outside to the inside in the radial direction. This causes the originally dispersed and suspended water mist in the plant to be continuously drawn in, converging towards the center to the vortex core region, and then steadily rising along the vortex tube, ultimately being directionally drawn out and discharged by the exhaust assembly. Therefore, this invention, through the perforated plate assembly and angular momentum air supply assembly, can effectively traction and transport water mist within the plant, resulting in good overall water mist removal and strong control over large-area dispersed water mist. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the vortex ventilation unit of the present invention; Figure 2 This is a schematic diagram of the orifice plate assembly of the present invention; Figure 3 This is a schematic diagram of the air supply device of the present invention; Figure 4 This is a schematic diagram of the structure of the blower, demisting mechanism and flow equalization mechanism of the present invention; Figure 5 This is an exploded view of the defogging mechanism and the flow equalization mechanism of the present invention; Figure 6 This is an exploded view of the horizontal deflection angle adjustment mechanism and the height adjustment mechanism of the present invention; Figure 7 This is a schematic diagram showing the arrangement of multiple vortex ventilation units according to the present invention.

[0018] Figure label: 1. Exhaust assembly; 2. Perforated plate assembly; 21. Non-perforated area; 22. Perforated area; 221. Airflow hole; 23. Lifting support leg; 24. Universal caster; 3. Angular momentum air supply assembly; 31. Air supply device; 311. Air supply bracket; 3111. Mounting frame; 3112. Connecting beam; 3113. First support plate; 3114. Second support plate; 312. Condensate tray; 313. Air supply fan; 314. Demisting mechanism; 3141. Demisting... 3142. Fog cylinder body; 315. Bending plate; 316. Flow equalization mechanism; 3151. Flow equalization cylinder body; 3152. Honeycomb plate; 3153. Screen; 3161. Adjusting bolt; 3162. Fixing nut; 3163. Adjusting nut; 3164. Removable bolt; 3165. Removable nut; 3171. Height adjustable nut; 3172. Height adjusting screw; 3173. Rotary drum; 3174. Locking nut; 3175. Locking bolt. Detailed Implementation

[0019] The technical solutions of this application will now be described clearly and in detail with reference to the accompanying drawings. In the description of the embodiments of this application, unless otherwise stated, "multiple" refers to two or more. The terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0020] like Figures 1 to 3As shown, the present invention provides a multi-vortex ventilation system, including at least one vortex ventilation unit, typically located inside a factory building. Each vortex ventilation unit includes an exhaust assembly 1, an orifice plate assembly 2, and at least one angular momentum air supply assembly 3. The exhaust assembly 1 is located at the top of the factory building and is used to exhaust air to the outside of the factory building. The orifice plate assembly 2 is located directly below the exhaust assembly 1 and directly above a moisture emission source. The moisture emission source may be hot and humid air emitted from a conveyor belt and the accompanying water mist. The orifice plate assembly 2 includes a plate body having a non-perforated area 21 in the middle and an open area 22 surrounding the non-perforated area 21. The angular momentum air supply assembly 3 is located between the exhaust assembly 1 and the orifice plate assembly 2, and the angular momentum air supply assembly 3 includes multiple air supply devices 31. Multiple air supply devices 31 are evenly distributed along the circumference of the perforated plate assembly 2. The air supply direction of each air supply device 31 is at a preset horizontal deflection angle to the vertical line connecting the center of the air supply device 31 and the vertical center line of the perforated plate assembly 2, and the air supply direction of each air supply device 31 is at a preset elevation angle to the horizontal plane on which the air supply device 31 is located, so that the humid and hot air flows through the perforated plate assembly 2 to form an upward vortex airflow. The preset horizontal deflection angle ranges from 15° to 25°, and the preset elevation angle ranges from 0° to 20°. Within the above angle range, the vortex ventilation unit of this application can form a stable upward vortex airflow.

[0021] When the multi-vortex ventilation system of this embodiment of the invention is working, the exhaust component 1 is activated, forming a stable upward negative pressure flow field at the top of the plant. Multiple air supply devices 31 simultaneously supply air, and their airflow is delivered to the area where the perforated plate component 2 is located at a preset horizontal deflection angle and a preset elevation angle. The airflow then rotates and converges above the perforated plate component 2 to form an initial rotating vortex. Under the coupling effect of the negative pressure convergence at the top, the initial rotating vortex at the bottom, and the boundary constraints of the perforated plate component 2, a columnar vortex airflow rotating around the central axis of the exhaust component 1 is gradually formed. This vortex airflow exhibits continuous upward motion in the axial direction and a negative pressure gradient from the outside to the inside in the radial direction. This causes the originally diffused and suspended water mist in the plant to be continuously drawn in, converge towards the center to the vortex core region, and rise steadily along the vortex tube, ultimately being directionally drawn out and discharged by the exhaust component 1. Therefore, this invention, through the perforated plate component 2 and the angular momentum air supply component 3, can effectively traction and transport water mist in the plant, resulting in good overall water mist removal and strong control over large-area diffused water mist.

[0022] In some embodiments of the present invention, such as Figure 2As shown, to meet the bottom plane conditions required for vortex generation and reduce the obstruction effect of the bottom plane on the capture of hot and humid airflow, the plate has a non-perforated area 21 in the middle and an open area 22 on the outside. The non-perforated area 21 provides continuous bottom plane boundary conditions, allowing multiple air jets to form a stable rotating convergence flow on its surface, thereby promoting the generation of initial rotating vorticity. Preferably, the size of the non-perforated area 21 is not less than 0.7 times the diameter of the exhaust port to ensure stable planar constraints in the vortex generation region. The open area 22 is provided outside the non-perforated area 21 to expand the effective range of the bottom plane, enabling it to cover the rotating convergence region formed by the angular momentum air jets, thereby enhancing the rotating convergence effect of the airflow. Simultaneously, the open area 22 has multiple airflow holes 221, allowing hot and humid air to enter the entrainment region of the vortex airflow through the holes and be transported upwards, thereby improving the capture and removal efficiency of hot and humid air while ensuring the stability of vortex generation.

[0023] In some embodiments of the present invention, the exhaust assembly 1 is used to form a stable upward airflow within the factory building, providing conditions for the axial development of the columnar vortex airflow. The exhaust assembly 1 includes a variable frequency axial flow exhaust fan, an exhaust duct, and an exhaust flange. The variable frequency axial flow exhaust fan is fixed to the factory roof and flexibly connected to the exhaust duct, and the exhaust flange is connected to the end of the exhaust duct. The variable frequency axial flow exhaust fan can provide exhaust volumes of varying intensities to accommodate different water mist release intensities. The width of the exhaust flange is half the diameter of the exhaust duct to reduce the entrainment angle range when the exhaust converging airflow entrains ambient air, thus concentrating the upward airflow in the vertical direction.

[0024] In some embodiments of the present invention, such as Figures 3 to 5 As shown, the air supply device 31 includes an air supply bracket 311, a condensate tray 312, an air supply fan 313, and a demisting mechanism 314. The air supply fan 313 is mounted on the air supply bracket 311. The demisting mechanism 314 includes a demisting cylinder 3141 located at the outlet of the air supply fan 313 and multiple bending plates 3142. The multiple bending plates 3142 are parallel to the axial direction of the demisting cylinder 3141 and are located inside the demisting cylinder 3141, forming a tortuous airflow channel between adjacent bending plates 3142. The condensate tray 312 is connected to the demisting cylinder 3141 and is used to receive condensate from inside the demisting cylinder 3141.

[0025] In this embodiment, in addition to the mist at the moisture emission source, water mist also diffuses inside the factory. Therefore, an inertial collision-type demisting mechanism 314, consisting of a demisting cylinder 3141 and a bending plate 3142, is integrated into the air supply device 31, and a condensate tray 312 connected to it is configured. This allows for pre-physical demisting of the humid and hot air while the blower 313 is supplying air. The multiple directional bends of the bending plate 3142 create a tortuous airflow channel, enhancing the efficiency of inertial separation of mist droplets and improving the moisture removal capacity per unit air volume. The condensate tray 312 is reliably connected to the demisting cylinder 3141 and has a reasonable volume and drainage path, ensuring timely collection and discharge of condensate and preventing droplets from being re-entrained into the airflow. The synergistic effect of the above structures reduces the moisture load entering the vortex core area and the exhaust system, thereby alleviating condensation corrosion in the exhaust system, extending equipment life, and reducing overall ventilation energy consumption.

[0026] In some embodiments of the present invention, such as Figures 3 to 5 As shown, the air supply device 31 also includes a flow equalization mechanism 315 connected to the outlet of the demisting mechanism 314. The flow equalization mechanism 315 includes a flow equalization cylinder 3151, a honeycomb plate 3152 and two layers of screens 3153. The honeycomb plate 3152 and the two layers of screens 3153 are arranged sequentially along the axial direction of the flow equalization cylinder 3151 inside the flow equalization cylinder 3151, and the honeycomb plate 3152 is located at one end close to the demisting mechanism 314.

[0027] In this embodiment, a flow equalization mechanism 315, consisting of a flow equalization cylinder 3151, a honeycomb plate 3152, and two layers of screens 3153, is added downstream of the demisting mechanism 314. The honeycomb plate 3152 is located near the end of the demisting mechanism 314, so that the airflow first passes through the honeycomb plate 3152. Its long pipe structure can weaken the lateral pulsation and thus straighten the airflow, ensuring that the airflow direction is the same. Then, after passing through the two layers of screens 3153, the large-scale vortex structure can be split into smaller vortex structures, thereby reducing the turbulence of the airflow. The two layers of screens 3153 realize step-by-step rectification, ensuring that multiple airflows can be accurately coupled above the perforated plate assembly 2 to form a stable and symmetrical vortex structure.

[0028] In some embodiments of the present invention, such as Figure 3 As shown, the air supply bracket 311 includes a mounting frame 3111, a pitch adjustment mechanism, a horizontal deflection angle adjustment mechanism, and a height adjustment mechanism. The air supply fan 313 is mounted on the mounting frame 3111 via the pitch adjustment mechanism, which is used to adjust the pitch angle of the air supply fan 313. The horizontal deflection angle adjustment mechanism and the height adjustment mechanism are used to adjust the horizontal deflection angle and height of the mounting frame 3111 and the air supply fan 313.

[0029] In this embodiment, because the air supply bracket 311 integrates three independent adjustable degrees of freedom—pitch adjustment mechanism, horizontal deflection angle adjustment mechanism, and height adjustment mechanism—it can precisely control the vertical lift angle, horizontal deflection angle, and installation elevation of the air supply airflow. Since the three types of adjustment mechanisms are structurally decoupled and operate independently, the air supply geometry parameters can be quickly reconstructed without disassembling or replacing components. This solves the technical problem of accurately adapting the attitude of the air supply fan 313 to different sized factory buildings, different distributions of moisture sources, and different vortex coupling requirements, thus improving the engineering applicability and flow field control robustness of the multi-vortex ventilation system.

[0030] In some embodiments of the present invention, such as Figure 3 and Figure 4 As shown, the pitch adjustment mechanism includes a connecting beam 3112, a first support plate 3113, a second support plate 3114, a connector, and an adjusting component. The connecting beam 3112 is located at the bottom of the mounting frame 3111. The first support plate 3113 and the second support plate 3114 are located at the bottom of the blower 313 along the axial direction of the blower 313. The first support plate 3113 is connected to the connecting beam 3112 via the adjusting component, and the second support plate 3114 is connected to the connecting beam 3112 via the connector. The first support plate 3113 is located at one end of the outlet of the blower 313. The connecting beam 3112 can be a U-shaped steel. The adjusting component includes an adjusting bolt 3161, a fixing nut 3162 that mates with the adjusting bolt 3161, and two adjusting nuts 3163. The adjusting bolt 3161 passes upwards sequentially into the bottom of the connecting beam 3112 and the first support plate 3113. The fixing nut 3162 is located on the upper side of the connecting beam 3112, and the two adjusting nuts 3163 are located on the upper and lower sides of the bottom of the first support plate 3113, respectively. The connecting component includes a removable bolt 3164 and a removable nut 3165 that mates with the removable bolt 3164. The removable bolt 3164 passes upward sequentially into the bottom of the connecting beam 3112 and the second support plate 3114, and the removable nut 3165 is located on the upper side of the bottom of the second support plate 3114.

[0031] In this embodiment, the fixing nut 3162 fixes the adjusting bolt 3161 to the connecting beam 3112 and does not participate in the adjustment. When increasing the elevation angle of the blower 313, first loosen the detachable nut 3165 and the detachable bolt 3164 of the connecting piece, then loosen the adjusting nut 3163 on the upper part of the first support plate 3113, rotate the lower adjusting nut 3163 to make it move upward on the adjusting bolt 3161, thereby raising the first support plate 3113 and increasing the elevation angle of the blower 313. Tighten the adjusting nut 3163 on the upper part of the first support plate 3113 to fix it, and finally tighten the detachable nut 3165 and the detachable bolt 3164 on the second support plate 3114. Similarly, when it is necessary to reduce the elevation angle of the blower 313, the lower adjusting nut 3163 is rotated, causing it to move downwards on the adjusting bolt 3161, thereby lowering the first support plate 3113 and reducing the elevation angle of the blower 313. Tightening the adjusting nut 3163 on the upper part of the first support plate 3113 then secures it. Adjusting the elevation angle of the blower 313 increases vortex stability; preferably, the elevation angle of the blower 313 does not exceed 20°.

[0032] The pitch adjustment mechanism of this embodiment adopts a double-support structure consisting of a first support plate 3113 and a second support plate 3114. The first support plate 3113 is connected to the connecting beam 3112 via a composite bolt adjusting component containing a fixed nut 3162 and two adjusting nuts 3163. The pitch angle of the blower 313 can be infinitely finely adjusted and highly repeatable locked within a range of 20°. By adjusting the pitch angle of the blower 313, vortex stability can be increased. The axial displacement of the adjusting nut 3163 of the adjusting component is converted into the angular displacement of the blower 313, and the double adjusting nuts 3163 are locked, so that the blower 313 can maintain a stable pitch angle even under operating vibration environment, ensuring that the rise angle of the airflow is controllable in the long term.

[0033] In some embodiments of the present invention, such as Figure 3 and Figure 6 As shown, the height adjustment mechanism includes a height-adjustable nut 3171 and a height-adjustable lead screw 3172 that cooperates with the height-adjustable nut 3171. The height-adjustable nut 3171 is fixedly installed, and the lower end of the height-adjustable lead screw 3172 is connected to the top of the mounting frame 3111 through a horizontal deflection angle adjustment mechanism. The horizontal deflection angle adjustment mechanism includes a rotating cylinder 3173, a locking nut 3174, and a locking bolt 3175 that cooperates with the locking nut 3174. The rotating cylinder 3173 is coaxially sleeved on the lower end of the height-adjustable lead screw 3172 and can rotate relative to the height-adjustable lead screw 3172. The rotating cylinder 3173 is connected to the top of the mounting frame 3111. A through hole is provided on the peripheral wall of the rotating cylinder 3173, and the locking nut 3174 is located in the through hole. The locking bolt 3175 is used to pass through the through hole and tighten the height-adjustable lead screw 3172.

[0034] In this embodiment, the height adjustment mechanism and the horizontal deflection angle adjustment mechanism work together. When adjusting the height, the height-adjustable nut 3171 is fixedly set. By rotating the height adjustment screw 3172 and the mounting frame 3111, the height of the mounting frame 3111, the blower 313, and other structures can be adjusted to ensure that multiple air supply devices 31 are at the same height. When adjusting the horizontal deflection angle, first loosen the locking bolt 3175 to allow the rotating drum 3173 to rotate freely around the height adjustment screw 3172. Then, manually or with the help of an instrument such as a laser positioner, adjust the orientation of the rotating drum 3173 so that the mounting frame 3111, the blower 313, and other structures rotate to the appropriate angle. After the angle is in place, tighten the locking bolt 3175 to make the rotating drum 3173 and the height adjustment screw 3172 reliably frictionally locked. This coordinated adjustment process ensures the spatial phase consistency of multiple air supply devices 31 in the horizontal plane and their geometric alignment in the vertical direction, providing a key structural guarantee for the multi-vortex system to form a stable, uniform, and non-interfering columnar vortex airflow field within the plant.

[0035] In some embodiments of the present invention, such as Figure 2 As shown, the plate has multiple air passages 221 in the opening area 22, and these air passages 221 are arranged in a matrix. The air passages 221 are rectangular, circular, rhomboid, or regular polygonal in shape. The opening ratio of the opening area 22 is 20% to 40%.

[0036] In this embodiment, because the airflow holes 221 are arranged in a matrix and the opening ratio is controlled within the range of 20% to 40%, the airflow around the periphery of the humid and hot air is ensured while maintaining the constraint strength of the gas-blocking area on the bottom boundary of the vortex. Furthermore, since the airflow holes 221 are selected in regular shapes such as rectangles, circles, rhombuses, or regular polygons, strong edge separation and local turbulence that may be caused by irregular hole shapes are avoided, ensuring that the airflow retains good directionality and stability after passing through. These two factors work together to stably couple the angular momentum-driven airflow with the bottom rising airflow, thereby improving the reliability and continuity of the columnar vortex airflow generation and enhancing the ability to attract and directionally remove diffused water mist within the plant.

[0037] In some embodiments of the present invention, such as Figure 2 As shown, the perforated plate assembly 2 also includes multiple lifting legs 23 and universal pulleys 24 located at the bottom of the lifting legs 23. The lifting legs 23 are located at the bottom of the plate body.

[0038] In this embodiment, the adjustable-height lifting legs 23 allow for adaptation to moisture emission sources at different heights and to the clearance requirements of the factory structure, ensuring the vertical coupling between the perforated plate assembly 2 and the exhaust assembly 1. The universal casters 24 at the bottom of the lifting legs 23 enable free movement, precise positioning, and on-the-spot turning of the entire unit on the factory floor, improving on-site installation and commissioning efficiency. Since the lifting legs 23 and the universal casters 24 constitute a composite motion mechanism, a dynamic adjustment and on-demand arrangement engineering application mode is achieved without sacrificing structural stability, enhancing the system's adaptability to the changing process environment of industrial plants.

[0039] In some embodiments of the present invention, each of the vortex ventilation units includes two angular momentum air supply components 3, which are arranged in a vertical direction, with the lower angular momentum air supply component 3 being arranged at the same height as the orifice plate component 2.

[0040] In this embodiment, when the height of the exhaust vent from the orifice plate assembly 2 is less than 5 to 6 times the air supply diameter, only one layer of angular momentum air supply assembly 3 is needed. When the height of the exhaust vent from the orifice plate assembly 2 is greater than 5 to 6 times the air supply diameter, two layers of angular momentum air supply assembly 3 are required. Since at least two angular momentum air supply assemblies 3 are set vertically, a superimposed angular momentum input can be formed across the entire height range between the exhaust assembly 1 and the orifice plate assembly 2, extending the axial development length of the columnar vortex airflow. Because the lower layer of angular momentum air supply assembly 3 is set at the same height as the orifice plate assembly 2, the strongest tangential induction can be applied immediately after the humid and hot air escapes from the moisture emission source, establishing a highly stable vortex initiation structure and providing a strong induction basis for the upper layer of air supply. The synergy of these two factors enables the vortex airflow to have a longer stable vortex tube length, a more uniform axial negative pressure distribution, and a stronger water mist capture capability in tall factory buildings. This solves the problems of vortex attenuation and negative pressure discontinuity caused by single-layer air supply when the factory building has a large net height, and improves the overall control efficiency of the system for diffuse water mist in tall spaces.

[0041] In some embodiments of the present invention, such as Figure 7 As shown, there are multiple vortex ventilation units. The preset horizontal deflection angles of the corresponding air supply devices 31 in two adjacent vortex ventilation units are complementary, so as to form two vortex airflows in opposite directions. The polygon formed by the multiple air supply devices 31 in the vortex ventilation unit has a side length of L, and the distance between two adjacent vortex ventilation units is 0.2L to L.

[0042] Specifically, such as Figure 7As shown, for a multi-vortex ventilation system, multiple vortex ventilation units can be rationally arranged according to the length and width characteristics of the factory building to achieve zoned control and coordinated removal of water mist in a large space. In each vortex ventilation unit, the shape formed by multiple air supply devices 31 is generally a square, with a side length not exceeding 15m. The spacing between adjacent vortex ventilation units is greater than 0.2 times the side length of the angular momentum air supply devices 31 and less than that side length to reduce mutual interference between adjacent vortex flow fields. Preferably, the rotation directions of the columnar air vortex airflow in adjacent vortex ventilation units are opposite to avoid adverse effects of airflow coupling on flow field stability. In each vortex ventilation unit, the number of air supply devices 31 is generally four, evenly distributed circumferentially; they can also be arranged in a triangle or pentagon. Of course, in smaller spaces, such as a single room, only one vortex ventilation unit is needed to meet the ventilation requirements.

[0043] To verify the negative pressure control capability of the vortex flow field formed by this invention and its improvement on water mist removal, a numerical simulation analysis was conducted compared with the traditional top exhaust method. The diameters of the four angular momentum air supply components 3 are 0.7m, the diameter of the exhaust pipe is 1m, and the width of the exhaust flange is 0.5m. The simulation parameters were set as follows: angular momentum air supply jet velocity of 3.5m / s and exhaust velocity of 10m / s. The belt width is 1.7m, the side length of the perforated plate component 2 is 1.8m, the side length of the gas shielding area is 0.75m, and the opening ratio of the gas flow area is 23%. The overall computational domain size is 30m × 24m × 3.4m, comprising four vortex ventilation units, with the columnar air vortices of adjacent vortex ventilation units rotating in opposite directions.

[0044] Numerical simulations using Fluent showed that, under the influence of angular momentum supply airflow, upper exhaust airflow, and orifice plate assembly 2, a columnar vortex airflow forms between the exhaust port and the bottom plane. The space between these two points is under negative pressure, exhibiting a significant negative pressure gradient centered on the vortex tube. The negative pressure near the bottom plane is approximately -7.5 Pa. This -7.5 Pa negative pressure control distance is 3.6 times longer than that of a top exhaust system. In a traditional top exhaust system, the negative pressure near the bottom plane is only about -0.3 Pa.

[0045] As can be seen from the above analysis, the water mist on the belt can be controlled and captured by the negative pressure vortex after release, which has a better ventilation and removal effect of water mist compared with the traditional top exhaust system.

[0046] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A multi-vortex ventilation system, characterized in that, The system includes at least one vortex ventilation unit, each of which includes an exhaust assembly, an orifice plate assembly, and at least one angular momentum air supply assembly. The orifice plate assembly is located directly below the exhaust assembly and includes a plate body with a non-perforated area in the center and an open area surrounding the non-perforated area. The open area has an opening ratio of 20% to 40%. The angular momentum air supply assembly is located between the exhaust assembly and the orifice plate assembly and includes multiple air supply devices. The multiple air supply devices are evenly distributed around the circumference of the orifice plate assembly. The air supply direction of each air supply device forms a preset horizontal deflection angle with the vertical line connecting the center of the air supply device and the vertical center line of the orifice plate assembly, and the air supply direction of each air supply device forms a preset elevation angle with the horizontal plane where the air supply device is located, so that the humid and hot air forms an upward vortex airflow after flowing through the orifice plate assembly. The air supply device includes an air supply bracket, a condensate tray, a blower, and a demisting mechanism. The blower is mounted on the air supply bracket. The demisting mechanism includes a demisting cylinder located at the outlet of the blower and multiple bending plates. The multiple bending plates are parallel to the axial direction of the demisting cylinder and are located inside the demisting cylinder, with a tortuous airflow channel formed between adjacent bending plates. The condensate tray is connected to the demisting cylinder and is used to receive condensate from inside the demisting cylinder. The air supply device also includes a flow equalization mechanism connected to the outlet of the demisting mechanism. The flow equalization mechanism includes a flow equalization cylinder, a honeycomb plate and two layers of screens. The honeycomb plate and the two layers of screens are arranged sequentially along the axial direction of the flow equalization cylinder, and the honeycomb plate is located at one end close to the demisting mechanism. The vortex ventilation unit comprises multiple units, and the preset horizontal deflection angles of the corresponding air supply devices in two adjacent vortex ventilation units are complementary to form two vortex airflows in opposite directions; the polygon formed by multiple air supply devices in each vortex ventilation unit has a side length of L, and the distance between two adjacent vortex ventilation units is 0.2L to L.

2. The multi-vortex ventilation system according to claim 1, characterized in that, The air supply bracket includes a mounting frame, a pitch adjustment mechanism, a horizontal deflection angle adjustment mechanism, and a height adjustment mechanism. The air supply fan is mounted on the mounting frame via the pitch adjustment mechanism, which is used to adjust the pitch angle of the air supply fan. The horizontal deflection angle adjustment mechanism and the height adjustment mechanism are used to adjust the horizontal deflection angle and height of the mounting frame and the air supply fan.

3. The multi-vortex ventilation system according to claim 2, characterized in that, The pitch adjustment mechanism includes a connecting beam, a first support plate, a second support plate, a connector, and an adjusting component. The connecting beam is located at the bottom of the mounting frame. The first support plate and the second support plate are located at the bottom of the blower along the axial direction of the blower. The first support plate is connected to the connecting beam via the adjusting component, and the second support plate is connected to the connecting beam via the connector. The first support plate is located at one end of the outlet of the blower. The adjusting component includes an adjusting bolt, a fixing nut that mates with the adjusting bolt, and two adjusting nuts. The adjusting bolt passes upward sequentially through the bottom of the connecting beam and the first support plate. The fixing nut is located on the upper side of the connecting beam, and the two adjusting nuts are located on the upper and lower sides of the bottom of the first support plate, respectively. The connecting component includes a detachable bolt and a detachable nut that mates with the detachable bolt. The detachable bolt passes upward sequentially through the bottom of the connecting beam and the second support plate, and the detachable nut is located on the upper side of the bottom of the second support plate.

4. The multi-vortex ventilation system according to claim 2, characterized in that, The height adjustment mechanism includes a height-adjustable nut and a height-adjustable screw that cooperates with the height-adjustable nut. The height-adjustable nut is fixedly installed, and the lower end of the height-adjustable screw is connected to the top of the mounting frame through the horizontal deflection angle adjustment mechanism. The horizontal deflection angle adjustment mechanism includes a rotating cylinder, a locking nut, and a locking bolt that cooperates with the locking nut; the rotating cylinder is coaxially sleeved on the lower end of the height adjusting screw and can rotate relative to the height adjusting screw; the rotating cylinder is connected to the top of the mounting frame; a through hole is provided on the peripheral wall of the rotating cylinder, and the locking nut is located in the through hole; the locking bolt is used to pass through the through hole and tighten the height adjusting screw.

5. The multi-vortex ventilation system according to claim 1, characterized in that, The plate has multiple air passages in the opening area, and the multiple air passages are arranged in a matrix; the shape of the air passages is rectangular, circular, rhomboid or regular polygonal.

6. The multi-vortex ventilation system according to claim 1, characterized in that, The perforated plate assembly also includes multiple lifting legs and omnidirectional pulleys located at the bottom of the lifting legs; the lifting legs are located at the bottom of the plate body.

7. The multi-vortex ventilation system according to claim 1, characterized in that, Each of the vortex ventilation units includes two angular momentum air supply components, which are arranged vertically, with the lower angular momentum air supply component being at the same height as the orifice plate component.

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