A closed cooling tower in which a coil is placed outside the air flow

Abstract

The application relates to a closed cooling tower with a coil pipe outside air flow, and relates to the technical field of closed cooling towers, which comprises a tower body, a filler and a coil pipe, the tower body is provided with a ventilation assembly and a spraying assembly, the ventilation assembly comprises a fan arranged on the tower body and located above the filler, ventilation holes for ventilating air to the filler are arranged on the tower body and above the coil pipe, and a water distribution tray is arranged on the tower body and between the ventilation holes and the coil pipe and is provided with a plurality of water distribution holes for adding cooling water to the coil pipe. According to the application, the coil pipe is arranged outside the air moving path, so that the probability of air blockage caused by the coil pipe is reduced, the air flow rate is accelerated, and the cooling efficiency of the cooling tower is improved; meanwhile, the water distribution tray blocks the adsorption of moisture on the coil pipe after the fan is started, so that the probability of the formation of dirt after the evaporation of moisture on the coil pipe is greatly reduced, and the cooling efficiency of the cooling tower is further improved.

Description

Technical Field

[0001] This application relates to the technical field of closed-circuit cooling towers, and more particularly to a closed-circuit cooling tower in which the coils are located outside the airflow. Background Technology

[0002] Closed-circuit cooling towers (also called evaporative air coolers or closed-loop cooling towers) are commonly used cooling equipment in production. They typically place a tubular heat exchanger inside the tower, and the cooling effect is achieved through heat exchange between circulating air, sprayed water, and circulating water. Because it is a closed-loop system, it can ensure that the water quality is not polluted, effectively protecting the efficient operation of the main equipment and extending its service life.

[0003] The principle of a cooling tower is that air enters the tower body through the air inlet louvers and moves upward. The air first provides initial cooling to the material in the coil. Then, the air moves through the coil to the packing material, while water is sprayed onto the packing material. The packing material disperses the cooling water into a mist, and the air moves to the packing material to cool and exchange heat with the cooling water. A small portion of the water evaporates and the air moves upward, carrying away heat in the form of latent heat. The remaining cooling water falls downward and comes into contact with the coil to exchange heat, thus continuing to cool the material in the coil. Finally, the cooling water flows to the bottom of the tower for reuse.

[0004] Because air has to pass through the coil and packing in sequence, the resistance to the air is doubled, resulting in very high resistance. This reduces the airflow rate. Furthermore, the air blowing onto the coil causes moisture on the coil to evaporate, making it easy for scale to form on the outer wall of the coil. This reduces the efficiency of heat exchange with the material inside the coil, thereby reducing the cooling efficiency of the cooling tower. Summary of the Invention

[0005] To improve the cooling efficiency of a cooling tower, this application provides a closed-loop cooling tower with the coils located outside the airflow.

[0006] This application provides a closed-loop cooling tower with the coil located outside the airflow, employing the following technical solution: A closed-loop cooling tower with coils positioned outside the airflow includes a tower body, packing material disposed on the tower body, and coils, wherein the packing material is located above the coils. The tower body is provided with a ventilation assembly and a spray assembly for ventilating and spraying the packing material. The ventilation assembly includes: A fan is provided on the tower body and above the packing. A ventilation hole for introducing air into the packing is provided on the tower body and above the coil. The water distribution plate is installed on the tower body and located between the ventilation holes and the coil, and has multiple water distribution holes for adding cooling water to the coil.

[0007] By adopting the above technical solution, when the fan starts, air enters the packing through the ventilation holes. At the same time, the spray assembly starts and sprays cooling water onto the packing. The packing disperses the cooling water into a mist, and the air exchanges heat with the misty cooling water to cool it. Some of the water evaporates and the air moves upward and is then removed by the fan to dissipate heat, while the rest of the cooling water flows downward into the water distribution plate to collect. Then, the cooling water flows through the water distribution holes to the coil to cool the material inside the coil. Finally, the cooling water flows downward to the bottom of the tower for recycling.

[0008] By placing the coils outside the airflow path, the probability of the coils obstructing the airflow is reduced, the airflow rate is accelerated, and the cooling efficiency of the cooling tower is improved. Simultaneously, by allowing outside air to enter and exchange heat with the cooling water, compared to the prior art where air exchanges heat with the coils before exchanging heat with the cooling water, this application lowers the temperature of the air when it comes into contact with the cooling water, thereby improving the cooling effect on the cooling water. Moreover, the cooling water cooling effect is better than air cooling the coils, thus improving the cooling efficiency of the cooling tower. Furthermore, the water distribution plate prevents the adsorption of moisture on the coils after the fan starts, greatly reducing the probability of scale buildup after moisture evaporation, further improving the cooling efficiency of the cooling tower.

[0009] Optionally, the spray assembly includes: A spray pump, wherein the spray pump is mounted on the tower body and communicates with the tower body; A spray plate is installed inside the tower body, above the packing and below the fan. The spray plate has clearance holes and clearance rings. The vertical projection of the fan is located inside the clearance rings. The lower surface of the spray plate has multiple first spray holes that are connected to the spray pump and spray mist-like cooling water downwards. The lower surface and inner wall of the clearance ring have multiple second and third spray holes that are connected to the spray pump and spray mist-like cooling water. The second and third spray holes are inclined downwards and their bottom ends are oriented towards the side close to the axis of the clearance ring.

[0010] By adopting the above technical solution, the spray pump starts, and cooling water is sprayed through the first spray hole onto the packing material located directly below the spray plate and the portion of the packing material located below the avoidance ring. At the same time, cooling water is sprayed downwards and toward one side of the axis of the avoidance ring through the second and third spray holes, thereby achieving spraying of the packing material below the avoidance ring and directly below the fan. Therefore, the first, second, and third spray holes work together to spray cooling water onto all the packing material, while air moves out through the inside of the avoidance ring. Thus, while achieving the spraying of cooling water onto the packing material, the obstruction effect on the air is reduced, thereby improving the cooling efficiency of the cooling tower.

[0011] Optionally, the water distribution plate is provided with a variable component, the variable component including: The mounting rod is mounted on the water distribution plate and has a gap between it and the bottom wall of the water distribution plate. A sliding plate is vertically slidably installed on the inner side wall of the water distribution plate and has a sliding hole that engages with the mounting rod. When the mounting rod engages with the sliding hole, the sliding plate divides the water distribution plate into two independent chambers, the first chamber being located above the second chamber. When the sliding plate moves downward and disengages from the mounting rod, the sliding hole allows cooling water in the first chamber to flow into the second chamber and push the sliding plate upward.

[0012] By adopting the above technical solution, cooling water flows downward into the first chamber, and then flows into the second chamber through the sliding hole. Next, the cooling water in the second chamber is added to the coil through the water distribution hole. The cooling water level in the second chamber rises, pushing the sliding plate upward, so that the mounting rod slides and installs into the sliding hole to seal it. Therefore, the cooling water level in the first chamber rises rapidly. Under the action of gravity, the cooling water in the first chamber pushes the sliding plate downward. The sliding plate pushes the cooling water through the water distribution hole and sprays it onto the coil, causing the scale on the coil to fall off, thereby further reducing the probability of scale accumulation on the coil and improving the cooling efficiency of the cooling tower.

[0013] Optionally, multiple mounting rods are provided, and a filter screen for filtering cooling water is detachably installed on the top of the multiple mounting rods via mounting screws. The sliding plate is located below the filter screen and moves upward after being pushed by the cooling water to impact the filter screen.

[0014] By adopting the above technical solution, the filter screen filters impurities entering the water distribution plate, thereby further reducing the probability of impurities falling onto the coil and forming scale. At the same time, the inclined filter screen allows impurities to be collected to one side, and the sliding plate impacts the filter screen under the pushing action of the cooling water, thereby further improving the filter screen's impurity collection effect and reducing the probability of impurities clogging the filter screen, thus further improving the cooling efficiency of the cooling tower.

[0015] Optionally, an impact block made of elastic material for impacting the filter screen may be detachably mounted on the upper surface of the sliding plate.

[0016] By adopting the above technical solution, the sliding plate pushes the impact block to impact the filter screen. After the impact block is squeezed and deformed, it will generate a downward thrust on the sliding plate, thereby further improving the squeezing effect of the sliding plate on the cooling water, improving the cleaning effect of the cooling water on the scale on the coil, and further improving the cooling efficiency of the cooling tower.

[0017] Optionally, a filter plate for filtration can be detachably installed on the ventilation hole.

[0018] By adopting the above technical solution, the incoming air is filtered, thereby reducing the amount of impurities entering the packing and reducing the atomization effect of the packing on the cooling water. It also reduces the probability of impurities falling onto the coils and forming scale, thereby further improving the cooling efficiency of the cooling tower.

[0019] Optionally, the tower body has a movable hole, and the tower body is provided with a support bar for placing the water distribution plate. A rotating plate is rotatably provided on the tower body, which abuts against the tower body and is used to block the movable hole. The rotating plate is threadedly connected to a rotating screw that is threadedly connected to the tower body.

[0020] By adopting the above technical solution, the rotating screw is turned to disengage from the tower body, the rotating plate is turned to open the moving hole, and then the water distribution plate is removed to clean the impurities on the filter screen. The water distribution plate is placed on the support bar for positioning, the rotating plate is closed, and the rotating screw is turned to connect to the tower body for positioning. This makes it convenient to clean the filter screen and disassemble and assemble the water distribution plate, and further improves the cooling efficiency of the cooling tower.

[0021] Optionally, the top of the tower body is provided with an installation hole for installing the fan, and the tower body is provided with a water-blocking mechanism to prevent rainwater from entering the fan. The water-blocking mechanism includes: A water baffle plate, which is detachably mounted on the tower body via a connecting assembly and is used to prevent rainwater from entering the fan. A rotating assembly, which is rotatably disposed on the lower surface of the baffle plate and is used to guide the air passing through the fan and is connected to the fan to provide power.

[0022] By adopting the above technical solution, the baffle plate prevents rainwater from entering the mounting hole and contacting the fan. The rotation of the fan drives the rotating component to rotate, which causes the air to move outward from the mounting hole. The removed air also prevents rainwater from entering the mounting hole through the gap between the baffle plate and the tower body and contacting the fan. At the same time, it makes it easier for the air blown out of the mounting hole, reducing the baffle plate's obstruction effect on the air blown out of the fan. Thus, while preventing rainwater from entering the fan, the baffle plate also reduces its obstruction effect on the air moving out. Therefore, the cooling tower can still operate normally in rainy weather, thereby improving the cooling efficiency of the cooling tower.

[0023] Optionally, the rotating assembly includes: A rotating pipe is rotatably mounted on the lower surface of the baffle plate and is detachably connected to the fan. A guide plate is mounted on a rotating tube and has multiple inclined flow channels formed by stamping a sheet metal. The height of the flow channels near the axis of the rotating tube is lower than the height of the channels away from the rotating tube.

[0024] By adopting the above technical solution, the rotating pipe is connected to the fan. When the fan is started, the rotating pipe rotates, which in turn drives the rotating disk to rotate. At the same time, the inclined guide channel allows air to move out of the mounting hole more quickly, further accelerating the air flow rate and reducing the degree to which the baffle plate obstructs the air flow. This achieves the goal of preventing rainwater from contacting the fan, while also reducing the baffle plate's obstruction effect on the air and improving the cooling efficiency of the cooling tower.

[0025] Optionally, the connection component includes: A connecting rod is provided on the lower surface of the baffle plate and is inserted into the top of the tower body for positioning. A connecting plate is mounted on the connecting rod and positioned against the tower body. A connecting screw is threaded through a connecting plate and connected to the tower body for positioning.

[0026] By adopting the above technical solution, the plug-in rod is plugged into the tower body, and the connecting plate is positioned against the tower body. At the same time, the rotating pipe is plugged into the fan. Then, the connecting screw is screwed into the tower body, thereby connecting the rotating pipe to the fan and installing the baffle. When disassembly is required, the connecting screw is screwed to disengage from the tower body. When the baffle is removed, the plug-in rod is disengaged from the tower head, and the rotating pipe is disengaged from the fan. This improves the convenience of baffle installation and removal, and connection and disassembly of the rotating pipe to the fan.

[0027] In summary, this application includes at least one of the following beneficial technical effects: By placing the coils outside the airflow path, the probability of the coils obstructing airflow is reduced, the airflow rate is accelerated, and the cooling efficiency of the cooling tower is improved. At the same time, the entry of outside air allows for heat exchange and cooling of the cooling water, thereby improving the cooling effect on the cooling water and thus increasing the cooling efficiency of the cooling tower. In addition, the water distribution plate prevents the adsorption of moisture on the coils after the fan starts, which greatly reduces the probability of scale buildup after moisture evaporates from the coils, further improving the cooling efficiency of the cooling tower. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of this application; Figure 2 yes Figure 1 A cross-sectional schematic diagram of AA in the middle; Figure 3This is a structural schematic diagram of the water distribution plate and the variable component in this application, wherein the water distribution plate is shown in cross section. Figure 4 This is a schematic diagram of the water-blocking mechanism in this application.

[0029] Reference numerals: 1. Tower body; 11. Packing material; 12. Coil; 13. Mounting hole; 14. Ventilation hole; 15. Support bar; 16. Guide rod; 17. Insertion block; 18. Filter plate; 2. Ventilation assembly; 21. Fan; 22. Water distribution plate; 23. Water distribution hole; 3. Variation assembly; 31. Mounting rod; 32. Sliding plate; 33. Filter screen; 34. Sliding hole; 35. First chamber; 36. Second chamber; 4. Spray assembly; 41. Spray pump; 42. Spray plate; 43. Spray pipe; 44. Clearance hole; 45. Clearance ring; 46. First spray hole; 47. Second spray hole; 48. Third spray hole; 5. Water blocking mechanism; 51. Water blocking plate; 52. Rotating assembly; 53. Rotating pipe; 54. Guide plate; 55. Flow channel; 56. Guide protrusion; 6. Connecting assembly; 61. Connecting rod; 62. Connecting plate; 63. Connecting screw; 64. Fixing block. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0031] This application discloses a closed cooling tower with the coils located outside the airflow.

[0032] Reference Figure 1 and Figure 2 A closed cooling tower with the coil outside the airflow includes a tower body 1, packing 11 and coil 12 installed on the inner wall of the tower body 1. The packing 11 is located above the coil 12. The tower body 1 is also equipped with a ventilation component 2 and a spray component 4. After the ventilation component 2 is started, it is used for ventilation of the tower body 1, while after the spray component 4 is started, it is used to spray cooling water onto the packing 11. The cooling water is dispersed into a mist on the packing 11.

[0033] The tower body 1 has a rectangular parallelepiped structure and a circular mounting hole 13 at the top. The axis of the mounting hole 13 coincides with the line connecting the centers of the upper and lower surfaces of the tower body 1. The ventilation assembly 2 includes a fan 21 and a water distribution plate 22. The fan 21 is vertical and fixedly installed on the mounting hole 13. When the fan 21 is started, the air moves vertically upward. Ventilation holes 14 are provided on the outer wall of the tower body 1 above the coil 12. Multiple ventilation holes 14 are arranged in a circular array around the axis of the mounting hole 13 below the packing 11. A mounting frame is fixedly installed on the outer wall of the tower body 1 at each ventilation hole 14. The mounting frame is U-shaped and open at the top. A filter plate 18 is inserted and installed on the mounting frame from top to bottom. The filter plate 18 blocks the ventilation hole 14 and filters impurities in the air. The filter plate 18 can also be removed for cleaning.

[0034] Reference Figure 2 and Figure 3 The water distribution plate 22 is installed on the inner wall of the tower body 1, below the ventilation hole 14 and above the coil 12. A movable hole is provided on the side wall of the tower body 1. A ring-shaped support bar 15 is fixedly installed on the inner wall of the tower body 1, and the water distribution plate 22 is placed on the support bar 15. The water distribution plate 22 can be removed through the movable hole. A rotating plate that blocks the movable hole is rotatably installed on the outer wall of the tower body 1. The end of the rotating plate away from the rotating plate is threadedly connected to a rotating screw that is threadedly connected to the tower body 1. After turning the rotating screw to disengage from the tower body 1, the rotating plate can be rotated and the water distribution plate 22 can be removed. Multiple water distribution holes 23 are provided on the lower surface of the water distribution plate 22. The multiple water distribution holes 23 are set one by one with the multiple pipes of the coil 12. The water distribution holes 23 are used to add cooling water to the coil 12.

[0035] A variable component 3 is provided on the water distribution plate 22. The variable component 3 includes a mounting rod 31 and a sliding plate 32. The mounting rod 31 is fixedly installed on the inner side wall of the water distribution plate 22. Four mounting rods 31 are arranged in a circumferential array around the axis of the water distribution plate 22. The tops of the four mounting rods 31 form an inclined placement surface. There is a gap between the bottom of the four mounting rods 31 and the inner bottom wall of the water distribution plate 22. A filter screen 33 is detachably installed on the top of the four mounting rods 31 through mounting screws. The placement surface makes the filter screen 33 tilted. The filter screen 33 filters the cooling water, causing the impurities on the filter screen 33 to move to one side.

[0036] The sidewall of the sliding plate 32 contacts the inner wall of the water distribution plate 22, and a guide rod 16 for guiding the movement of the sliding plate 32 is fixedly installed on the inner wall of the water distribution plate 22, so that the sliding plate 32 slides vertically on the inner wall of the water distribution plate 22. The sliding plate 32 is made of a lightweight material, such as plastic. The sliding plate 32 has four sliding holes 34 that are inserted and engaged with four mounting rods 31. When the four mounting rods 31 are inserted and engaged with the four sliding holes 34, the sliding plate 32 divides the water distribution plate 22 into two independent chambers, namely a first chamber 35 and a second chamber 36. The first chamber 35 is located above the second chamber 36. The first chamber 35 is used to receive the cooling water passing through the packing 11. An impact block for impacting and vibrating the filter screen 33 is detachably installed on the upper surface of the sliding plate 32 by screws. The impact block is made of an elastic material, such as plastic.

[0037] Reference Figure 2 and Figure 3 The cooling water in the first chamber 35 pushes the sliding plate 32 downward, and the sliding plate 32 pushes the cooling water out through the water distribution hole 23, thereby increasing the impact effect on the scale on the coil 12 and reducing the probability of scale accumulation on the coil 12. Moreover, after the sliding plate 32 moves downward, the sliding hole 34 is disengaged from the four mounting rods 31, and the cooling water in the first chamber 35 flows into the second chamber 36 through the four sliding holes 34. Part of the cooling water flows out through the water distribution hole 23, while part of the cooling water accumulates in the water distribution plate 22, thereby causing the sliding plate 32 to move upward. The upward movement of the sliding plate 32 drives the impact block to move upward and impact the filter screen 33 to form vibration, thereby causing the impurities on the filter screen 33 to move to one side, accelerating the rate at which the cooling water passes through the filter screen 33. Moreover, after the impact block is deformed, it also generates a downward thrust on the sliding plate 32.

[0038] After the fan 21 is started, the outside air of the tower body 1 moves to the packing 11 through the ventilation hole 14, thereby introducing air into the packing 11. At the same time, the spray assembly 4 sprays cooling water toward the packing 11. The packing 11 disperses the cooling water into a mist, and the air comes into contact with the mist of cooling water to exchange heat and cool down. Some water evaporates and air rises into the fan 21. Finally, the evaporated water and air escape into the air around the tower body 1 through the mounting hole 13. The remaining cooling water flows into the first chamber 35 after being cooled by the packing 11, and the filter screen 33 filters the cooling water.

[0039] Cooling water in the first chamber 35 flows into the second chamber 36 through the sliding hole 34. Part of the cooling water in the second chamber 36 is added to the coil 12 through the water distribution hole 23, while the other part of the cooling water accumulates in the second chamber 36, thereby pushing the sliding plate 32 upward, so that the four mounting rods 31 are inserted and installed into the sliding hole 34. At this time, the cooling water in the first chamber 35 increases sharply. The cooling water in the first chamber 35 pushes the sliding plate 32 downward, so that the mounting rods 31 are disengaged from the sliding hole 34. The cooling water in the first chamber 35 flows into the second chamber 36 through the sliding hole 34, and then repeats the cycle, thereby increasing the treatment effect on the scale on the coil 12, reducing the probability of scale accumulation on the coil 12, and improving the cooling efficiency of the cooling tower.

[0040] Reference Figure 1 and Figure 2 The spray assembly 4 includes a spray pump 41 and a spray plate 42. The spray pump 41 is fixedly installed on the outer wall of the tower body 1 and communicates with the bottom of the tower body 1 located below the coil 12. The spray plate 42 is fixedly installed on the inner wall of the tower body 1 and is located above the packing 11 and below the fan 21. A spray pipe 43 communicating with the spray pump 41 is fixedly installed on the spray plate 42. A circular clearance hole 44 is formed on the inner wall of the spray plate 42. A clearance ring 45 is fixedly installed in the clearance hole 44, and the vertical projection of the fan 21 is located inside the clearance ring 45.

[0041] Multiple first spray holes 46 are evenly distributed along the axial and radial directions of the spray plate 42 on its lower surface, while multiple second spray holes 47 are evenly distributed along the axial and radial directions of the avoidance ring 45 on its lower surface, and multiple third spray holes 48 are evenly distributed along the axial and radial directions of the avoidance ring 45 on its inner wall. All three spray holes 46, 47, and 48 spray mist-like cooling water. The first spray holes 46 spray a portion of the packing material 11 directly below the spray plate 42 and below the avoidance ring 45, while the second and third spray holes 47 and 48 work together to spray the packing material 11 below the avoidance ring 45 and below the fan 21.

[0042] Reference Figure 2 and Figure 4 The tower body 1 is provided with a water-blocking mechanism 5 to prevent rainwater from entering the fan 21. The water-blocking mechanism 5 includes a water-blocking plate 51 and a rotating component 52. The water-blocking plate 51 is detachably connected to the top of the tower body 1 through a connecting component 6. The water-blocking plate 51 is disc-shaped and its axis coincides with the axis of the mounting hole 13. The outer circular surface of the water-blocking plate 51 is located outside the mounting hole 13. The water-blocking plate 51 is used to prevent rainwater from entering the mounting hole 13 and contacting the fan 21.

[0043] The connecting assembly 6 includes a connecting rod 61, a connecting plate 62, and a connecting screw 63. Multiple connecting assemblies 6 are arranged in a circumferential array around the axis of the baffle plate 51 and are located outside the mounting holes 13. The connecting rod 61 is fixedly installed on the lower surface of the baffle plate 51 and is set vertically downward. A fixing block 64 is fixedly installed on the upper surface of the tower body 1. The connecting rod 61 is inserted into the upper surface of the fixing block 64 for positioning. The connecting plate 62 is fixedly installed on the side wall of the connecting rod 61 and abuts against the upper surface of the fixing block 64 for positioning. The connecting screw 63 passes through the connecting plate 62 and is threaded to the fixing block 64 for positioning. At the same time, the baffle plate 51 can be removed by turning the connecting screw 63, thereby realizing the installation and removal of the baffle plate 51.

[0044] Reference Figure 2 and Figure 4 The rotating assembly 52 is rotatably mounted on the lower surface of the baffle plate 51 and is used to guide the air passing through the fan 21 and is connected to the fan 21 to provide power. The rotating assembly 52 includes a rotating tube 53 and a guide plate 54. The rotating tube 53 is coaxially rotatably mounted on the lower surface of the baffle plate 51, and the guide plate 54 is coaxially fixedly mounted on the outer wall of the rotating tube 53. The guide plate 54 is made of stamped metal sheet and has a frustum-shaped shell structure. The guide plate 54 has multiple flow channels 55 and multiple guide ridges 56 arranged around the circumference of the rotating tube 53. Each guide ridge 56 is located between two adjacent flow channels 55. The flow channels 55 are inclined and the height of the end near the axis of the rotating tube 53 is lower than the height of the end away from the axis of the rotating tube 53.

[0045] A plug-in block 17 is fixedly installed at the bottom of the rotating tube 53. When the connecting rod 61 is plugged into the fixed block 64, the plug-in block 17 is plugged into the rotating shaft of the fan 21, thereby connecting the fan 21 and the rotating tube 53. When the fan 21 starts running, it drives the rotating tube 53 and the guide plate 54 to rotate. The rotation of the guide plate 54 is used to exhaust the air passing through the mounting hole 13. Then the air is output through the gap between the baffle plate 51 and the tower body 1. Therefore, the output air will also block the entry of rainwater. At the same time, the baffle plate 51 is used to block the rainwater, thereby preventing the rainwater from entering the mounting hole 13 and contacting the fan 21.

[0046] The working principle of this application embodiment is as follows: When the fan 21 starts, the guide plate 54 rotates. Outside air is filtered through the filter plate 18 and then moves to the packing 11 through the ventilation hole 14. At the same time, the spray pump 41 starts, and cooling water is sprayed onto the packing 11 and dispersed into a mist. Thus, the air comes into contact with the misty cooling water for heat exchange and cooling. Some of the cooling water evaporates and the air passes through the fan 21 and is dispersed into the air around the tower 1 under the guidance of the guide plate 54. The remaining cooling water flows downward and flows into the first chamber 35 after being filtered through the filter screen 33. Then, the cooling water flows into the second chamber 36 through the sliding hole 34. The cooling water is added to the coil 12 through the water distribution hole 23 to cool the coil 12. Finally, the cooling water flows to the bottom of the tower 1 for storage and reuse, so that the coil 12 is located outside the air flow range. Therefore, the coil 12 reduces the obstruction effect of the coil 12 on the air movement and also reduces the probability of scale buildup on the coil 12, thus improving the cooling efficiency of the cooling tower.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A closed-loop cooling tower with the coil located outside the airflow, comprising a tower body (1), packing (11) disposed on the tower body (1), and a coil (12), wherein the packing (11) is located above the coil (12), characterized in that: The tower body (1) is provided with a ventilation assembly (2) and a spray assembly (4) for ventilating and spraying the packing (11). The ventilation assembly (2) includes: A fan (21) is installed on the tower body (1) and above the packing (11). A ventilation hole (14) for introducing air into the packing (11) is provided on the tower body (1) and above the coil (12). Water distribution plate (22), the water distribution plate (22) is set on the tower body (1) and located between the ventilation hole (14) and the coil (12) and has multiple water distribution holes (23) for adding cooling water to the coil (12). The water distribution plate (22) is provided with a variable component (3), the variable component (3) including: Mounting rod (31), which is mounted on water distribution plate (22) and forms a gap with the bottom wall of water distribution plate (22); A sliding plate (32) is vertically slidably installed on the inner side wall of the water distribution plate (22) and has a sliding hole (34) that slides and cooperates with the mounting rod (31). When the mounting rod (31) slides and cooperates with the sliding hole (34) to block, the sliding plate (32) divides the water distribution plate (22) into a first chamber (35) and a second chamber (36) that are independent of each other. The first chamber (35) is located above the second chamber (36). When the sliding plate (32) moves down and disengages from the mounting rod (31), the sliding hole (34) allows the cooling water in the first chamber (35) to flow into the second chamber (36) and push the sliding plate (32) up. The mounting rod (31) is provided in multiple ways. The top of the multiple mounting rods (31) is detachably mounted with a filter screen (33) that filters the cooling water and is in an inclined state via mounting screws. The sliding plate (32) is located below the filter screen (33) and moves upward after being pushed by the cooling water to impact the filter screen (33).

2. A closed-loop cooling tower with coils placed outside the airflow according to claim 1, characterized in that: The spray assembly (4) includes: Spray pump (41), the spray pump (41) is installed on the tower body (1) and communicates with the inside of the tower body (1); Spray plate (42) is set inside the tower body (1) and above the packing (11) and below the fan (21). The spray plate (42) has a clearance hole (44) and a clearance ring (45) is set on the clearance hole (44). The vertical projection of the fan (21) is located inside the clearance ring (45). The lower surface of the spray plate (42) has a plurality of first spray holes (46) that are connected to the spray pump (41) and spray mist-like cooling water downwards. The lower surface and inner wall of the clearance ring (45) have a plurality of second spray holes (47) and third spray holes (48) that are connected to the spray pump (41) and spray mist-like cooling water. The second spray holes (47) and third spray holes (48) are respectively set downwards at an angle and the bottom end is set towards the side close to the axis of the clearance ring (45).

3. A closed-loop cooling tower with coils placed outside the airflow according to claim 1, characterized in that: The upper surface of the sliding plate (32) is detachably fitted with an impact block made of elastic material for impacting the filter screen (33).

4. A closed-loop cooling tower with coils placed outside the airflow according to claim 1, characterized in that: A filter plate (18) for filtration can be detachably installed on the ventilation hole (14).

5. A closed-loop cooling tower with coils placed outside the airflow according to claim 1, characterized in that: The tower body (1) has a movable hole, and a support bar (15) is provided on the tower body (1) for placing the water distribution plate (22). A rotating plate is rotatably provided on the tower body (1) and abuts against the tower body (1) for sealing the movable hole. The rotating plate is threadedly connected to a rotating screw threadedly connected to the tower body (1).

6. A closed-loop cooling tower with coils placed outside the airflow according to claim 1, characterized in that: The top of the tower body (1) is provided with an installation hole (13) for installing the fan (21). The tower body (1) is provided with a water-blocking mechanism (5) to prevent rainwater from entering the fan (21). The water-blocking mechanism (5) includes: A water baffle (51) is detachably mounted on the tower body (1) via a connecting assembly (6) and is used to block rainwater from entering the fan (21). Rotating assembly (52), which is rotatably disposed on the lower surface of the baffle plate (51) and is used to guide the air passing through the fan (21) and is connected to the fan (21) to provide power.

7. A closed-loop cooling tower with coils placed outside the airflow according to claim 6, characterized in that: The rotating assembly (52) includes: Rotating pipe (53), which is rotatably mounted on the lower surface of baffle plate (51) and detachably connected to fan (21); The guide plate (54) is set on the rotating tube (53) and has multiple inclined guide channels (55) formed by stamping the plate. The height of the guide channel (55) near the axis of the rotating tube (53) is lower than the height of the end away from the rotating tube (53).

8. A closed-loop cooling tower with coils placed outside the airflow according to claim 7, characterized in that: The connection component (6) includes: Connecting rod (61), the connecting rod (61) is set on the lower surface of the baffle plate (51) and inserted into the top of the tower body (1) for positioning; A connecting plate (62) is mounted on a connecting rod (61) and abuts against the tower body (1) for positioning. A connecting screw (63) is threaded through a connecting plate (62) and connected to the tower body (1) for positioning.

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