Water-saving closed cooling tower

Abstract

The invention discloses a water-saving closed cooling tower, and relates to the technical field of cooling, the water-saving closed cooling tower comprises a tower body, an air guide pipe and a reversing assembly, the tower body is internally provided with a heat exchange cavity, a filling cavity, a water collection cavity and an air induction cavity in sequence from top to bottom, and the tower body is provided with an air outlet communicated with the heat exchange cavity; the air guide pipe sequentially penetrates through the heat exchange cavity, the filling cavity and the water collecting cavity and communicates with the air inducing cavity, a plurality of first air guide openings communicating with the heat exchange cavity and a plurality of second air guide openings communicating with the filling cavity are formed in the air guide pipe, and the end, away from the air inducing cavity, of the air guide pipe is closed. The reversing assembly comprises a plurality of first wind shields in one-to-one correspondence with the positions of the second air guide ports, the first wind shields are slidably mounted on the air guide pipe, the air cooling capacity of the cooling tower is improved, the critical temperature of air cooling is increased, then the proportion duration of spraying mode operation is prolonged, and the water saving capacity is improved.

Description

Technical Field

[0001] This invention relates to the field of cooling technology, and more specifically, to a water-saving closed-loop cooling tower. Background Technology

[0002] Closed-circuit cooling towers are widely used for circulating liquid cooling in industrial equipment such as power plants. There are three main types of closed-circuit cooling towers: dry, wet, and combined dry-wet. Dry cooling towers cool the circulating liquid through air cooling, while wet cooling towers cool the circulating liquid through spraying. Combined dry-wet cooling towers combine the advantages of dry and wet cooling towers. They operate in air-cooled mode during low-temperature seasons and in a combination of air-cooled and sprayed modes during high-temperature seasons, resulting in a more stable cooling effect.

[0003] Water-saving capacity is one of the important indicators for evaluating wet and dry combined cooling towers. This is especially true for wet and dry combined cooling towers used in arid regions, where water-saving capacity needs to be improved. In low-temperature environments, wet and dry combined cooling towers use air cooling to lower the temperature. When the ambient temperature rises to a critical value, air cooling is insufficient to complete the cooling work, so spraying is required to enhance the cooling intensity in conjunction with air cooling. Running the spraying mode will cause water to evaporate, thus consuming water. The stronger the air cooling capacity of the wet and dry combined cooling tower, the higher the critical temperature, and the lower the proportion of spraying mode operation, thus the stronger the water-saving capacity. Conversely, the weaker the air cooling capacity of the wet and dry combined cooling tower, the lower the critical temperature, and the higher the proportion of spraying mode operation, resulting in weaker water-saving capacity. Therefore, the air cooling capacity directly affects the overall water-saving capacity of the cooling tower.

[0004] Traditional dry-wet combined cooling towers utilize air cooling systems that operate in the heat exchange zone of the circulating coolant and the packing zone of the spray water. Air vents are installed on one side of the tower to correspond to the heat exchange zone and the packing zone, respectively. In both air-cooling and spray modes, airflow enters the heat exchange zone and the packing zone through the air vents, cooling the circulating coolant and the spray water. In dry-wet cooling mode, only the airflow needs to pass through the heat exchange zone to cool the circulating coolant; the packing zone is a non-working area, and the airflow passing through it does not participate in cooling the circulating coolant. This results in significant airflow loss during air cooling, leading to a higher proportion of operation in spray mode and reduced water-saving capacity.

[0005] In conclusion, how to reduce the loss of airflow during cooling is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a water-saving closed-loop cooling tower that improves the air cooling capacity of the cooling tower, increases the critical temperature of air cooling, thereby increasing the proportion of operation time in spray mode and improving water saving capacity.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A water-saving closed-loop cooling tower includes:

[0009] The tower body has, from top to bottom, a heat exchange chamber, a filling chamber, a water collection chamber, and an exhaust chamber. The tower body is provided with an exhaust port that communicates with the heat exchange chamber, and the exhaust chamber is connected to the outside.

[0010] The air duct passes sequentially through the heat exchange chamber, the filling chamber, and the water collection chamber, and communicates with the air intake chamber. The air duct is provided with a plurality of first air inlets communicating with the heat exchange chamber and a plurality of second air inlets communicating with the filling chamber. The end of the air duct away from the air intake chamber is closed.

[0011] The reversing assembly includes a plurality of first baffles that correspond one-to-one with the positions of the second air inlets, and the plurality of first baffles are slidably installed on the air duct.

[0012] Furthermore, the heat exchange chamber is provided with a heat exchange tube, the filling chamber is provided with a filling material, and an exhaust fan is installed at the exhaust port.

[0013] Furthermore, the cross-section of the air-expelling cavity is conical, an air-expelling fan is provided inside the air-expelling cavity and is arranged coaxially with the air guide pipe, and the tower body is provided with a plurality of air inlets communicating with the air-expelling cavity, and the plurality of air inlets are distributed in a circumferential array along the axis of the air guide pipe.

[0014] Furthermore, the tower body is provided with a spraying assembly, which includes a plurality of nozzles located at the top of the heat exchange tube.

[0015] Furthermore, the spraying assembly further includes:

[0016] A water pump is installed on the tower body, and the water inlet of the water pump is connected to the water collection chamber;

[0017] A water supply pipe, the two ends of which are respectively connected to the nozzle and the outlet of the water pump.

[0018] Furthermore, the spraying assembly further includes:

[0019] A filter plate is placed on top of the water collection chamber and installed on the tower body.

[0020] Furthermore, the tower body is provided with a connecting cavity, which is located between the heat exchange cavity and the filling cavity. The air guide pipe is provided with a plurality of third air guide ports communicating with the connecting cavity. The reversing assembly also includes a plurality of second baffles corresponding one-to-one with the positions of the third air guide ports.

[0021] Furthermore, the commutation assembly further includes:

[0022] A connector is disposed inside the air duct and is used to connect the first baffle plate and the second baffle plate. When the first baffle plate is in the state of closing the second air vent, the third air vent is in the state of communicating with the filling cavity. When the second baffle plate is in the state of closing the third air vent, the second air vent is in the state of communicating with the connecting cavity.

[0023] Furthermore, the commutation assembly further includes:

[0024] A drive unit is installed on the tower body and is used to control the rotation of the connector along the axis of the air guide pipe.

[0025] Furthermore, at the exhaust port, a plurality of grid plates are hinged in a parallel manner along the axis of the air guide pipe. The grid plates are hinged to the tower body, and the minimum distance between two adjacent grid plates is less than the width of the grid plate. A limiting member is installed on the tower body to limit the maximum rotation angle of the grid plates.

[0026] The water-saving closed-loop cooling tower provided by this invention, in use, has a heat exchange chamber, a filling chamber, a water collection chamber, and an exhaust chamber arranged sequentially from top to bottom inside the tower body. An exhaust port communicating with the heat exchange chamber is provided on the tower body, and an air guide pipe is provided inside the tower body. The air guide pipe passes sequentially through the heat exchange chamber, the filling chamber, and the water collection chamber, and communicates with the exhaust chamber. The air guide pipe has several first air guide ports communicating with the heat exchange chamber and several second air guide ports communicating with the filling chamber. The end of the air guide pipe away from the exhaust chamber is closed. That is to say, the air guide pipe introduces the cold air entering from the exhaust chamber into the heat exchange chamber through the first air guide ports to achieve the heat exchange and cooling function. Hot air is promptly discharged through the exhaust vents. The reversing assembly includes several first baffles that correspond one-to-one with the positions of the second air vents. These first baffles are slidably installed on the air duct. When only air is used for heat dissipation, the first baffles block the airflow at the positions of the second air vents, so that air can only enter the heat exchange chamber through the first air vents. This avoids obstructing the airflow in the non-working state of the filling chamber, increases the airflow intensity through the heat exchange chamber, thereby improving the air cooling effect, raising the critical temperature for switching the spray mode, reducing the duration of the spray mode, and thus improving the water-saving capacity of the cooling tower. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the hybrid mode provided by the present invention;

[0029] Figure 2 This is a schematic diagram of the air-cooled mode provided by the present invention;

[0030] Figure 3 This is a schematic diagram of the structure of the air guide plate provided by the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of the heat exchange tube provided by the present invention;

[0032] Figure 5 This is a schematic diagram of the filling cavity provided by the present invention;

[0033] Figure 6 This is a structural schematic diagram of the tower body cross-section provided by the present invention;

[0034] Figure 7 This is a partially enlarged structural schematic diagram of the grid plate provided by the present invention.

[0035] Figures 1-7 In the accompanying drawings, the reference numerals include:

[0036] 1. Tower body;

[0037] 2. Heat exchange chamber; 201. Heat exchange tube; 202. Liquid tank; 203. Water inlet pipe; 204. Water outlet pipe; 205. Fin plate;

[0038] 3. Connecting cavity; 301. Enclosure panel;

[0039] 4. Filling cavity; 401. Top mesh plate; 402. Bottom mesh plate; 403. Filler material; 404. Partition plate;

[0040] 5. Water collection chamber;

[0041] 6. Exhaust chamber; 601. Exhaust fan; 602. Air inlet;

[0042] 7. Exhaust vent;

[0043] 8. Air duct; 801. First air vent; 802. Second air vent; 803. Third air vent;

[0044] 9. Reversing assembly; 901. First wind deflector; 902. Second wind deflector; 903. Connector; 904. Drive unit; 905. Rotating shaft;

[0045] 10. Spraying assembly; 1001. Sprayer head; 1002. Water supply pipe; 1003. Water pump; 1004. Filter plate;

[0046] 11. Grid plate; 1101. Limiting component; 1102. Limiting block. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] The core of this invention is to provide a water-saving closed-loop cooling tower that improves the cooling tower's air-cooling capacity, increases the critical temperature for air cooling, and thereby increases the proportion of time spent in spray mode operation, thus improving water-saving capacity.

[0049] Please refer to Figure 2 A water-saving closed-loop cooling tower includes a tower body 1, an air duct 8, and a reversing assembly 9. The tower body 1 has a heat exchange chamber 2, a filling chamber 4, a water collection chamber 5, and an air intake chamber 6 arranged sequentially from top to bottom. The tower body 1 has an exhaust port 7 communicating with the heat exchange chamber 2. The air duct 8 passes through the heat exchange chamber 2, the filling chamber 4, and the water collection chamber 5 in sequence and communicates with the air intake chamber 6. The air duct 8 has a plurality of first air guide ports 801 communicating with the heat exchange chamber 2 and a plurality of second air guide ports 802 communicating with the filling chamber 4. The end of the air duct 8 away from the air intake chamber 6 is closed. The reversing assembly 9 includes a plurality of first baffle plates 901 corresponding one-to-one with the positions of the second air guide ports 802. The plurality of first baffle plates 901 are slidably installed on the air duct 8.

[0050] It should be noted that in the embodiments of the present invention, the tower body 1 is cylindrical or other shapes, and the bottom of the tower body 1 is supported by an annular support.

[0051] Optionally, in some embodiments, the air duct 8 is arranged coaxially with the tower body 1, and the air duct 8 can be made of any rigid material, such as metal, PVC, PE, etc.

[0052] Optionally, in some embodiments, the number of first air vents 801 can be set as needed, and the sum of the opening angles of a plurality of first air vents 801 is greater than 350 degrees.

[0053] Optionally, in some embodiments, a rear exhaust fan is installed at the exhaust vent 7, which can help enhance airflow.

[0054] Optionally, in some embodiments, the first baffle plate 901 can slide along the axial direction of the air guide 8 or slide around the circumference of the air guide 8, both of which can achieve the closing and opening of the second air guide 802.

[0055] In the above embodiment, a slide rail is installed inside the air duct 8 along the moving direction of the first wind deflector 901, and the first wind deflector 901 is slidably installed in the slide rail to improve the smoothness of the first wind deflector 901 when it slides.

[0056] In the above embodiments, the position of the first wind deflector 901 can be controlled manually or by using electrical components.

[0057] In use, the tower body 1 contains, from top to bottom, a heat exchange chamber 2, a filling chamber 4, a water collection chamber 5, and an air intake chamber 6. The tower body 1 has an exhaust port 7 communicating with the heat exchange chamber 2, and an air guide pipe 8 is installed inside the tower body 1. The air guide pipe 8 passes sequentially through the heat exchange chamber 2, the filling chamber 4, and the water collection chamber 5, and communicates with the air intake chamber 6. The air guide pipe 8 has several first air guide ports 801 communicating with the heat exchange chamber 2 and several second air guide ports 802 communicating with the filling chamber 4. The end of the air guide pipe 8 away from the air intake chamber 6 is closed. That is, the air guide pipe 8 introduces the cold air entering the air intake chamber 6 into the heat exchange chamber 2 through the first air guide ports 801 to achieve heat exchange and cooling. Air is discharged promptly through the exhaust vent 7. The reversing component 9 includes several first baffles 901 that correspond one-to-one with the positions of the second air vents 802. The several first baffles 901 are slidably installed on the air duct 8. When only air is used for heat dissipation, the several first baffles 901 block the positions of the second air vents 802 one-to-one. Therefore, air can only enter the heat exchange chamber 2 through the first air vents 801, avoiding the obstruction of airflow in the non-working filling chamber 4, increasing the airflow intensity through the heat exchange chamber 2, thereby improving the air cooling effect, increasing the critical temperature for switching the spray mode, reducing the proportion of spray mode duration, and thus improving the water-saving capacity of the cooling tower.

[0058] Please refer to Figure 1 In some embodiments, the heat exchange chamber 2 is provided with a heat exchange tube 201, which is connected to the required heat exchange equipment to achieve the purpose of heat exchange. The filling chamber 4 is provided with a filler material 403, which is used to cool the water after heat exchange.

[0059] Optionally, in some embodiments, several sets of annular heat exchange tubes 201 are arranged vertically, with each set of annular heat exchange tubes 201 concentrically distributed in the horizontal direction, so that there are gaps between the annular heat exchange tubes 201 to improve the airflow within them.

[0060] Optionally, in some embodiments, the annular heat exchange tube 201 is made of copper alloy.

[0061] Optionally, in some embodiments, a liquid tank 202 is also included, which has two independent cavities. The two independent cavities are respectively provided with an inlet pipe 203 and an outlet pipe 204. The beginning and end of the annular heat exchange tube 201 are respectively connected to the two independent cavities of the liquid tank 202, and the inlet pipe 203 and the outlet pipe 204 are respectively connected to the pipeline of the circulating cooling medium.

[0062] Optionally, in some embodiments, temperature sensors are installed on both the inlet pipe 203 and the outlet pipe 204. The cooling range is determined by monitoring the temperature difference of the cooling medium by the two temperature sensors, and the timing of switching the cooling mode can be determined based on the judgment data.

[0063] Optionally, in some embodiments, a plurality of radially extending ribs 205 are distributed around the annular heat exchange tube 201. The ribs 205 fix all the annular heat exchange tubes 201 and are fixedly connected to the heat exchange tubes 201 to achieve overall fixation of the heat exchange tube group 201.

[0064] Optionally, in some embodiments, the filling cavity 4 is filled with a filler material 403, which is a drip-type filler. After the spray water enters the heat exchange tube 201, it falls through the filler material 403 in a drip manner to achieve cooling of the spray water.

[0065] Optionally, in some embodiments, the upper and lower filling cavity 4 are provided with parallel distributed upper mesh plate 401 and lower mesh plate 402. The upper mesh plate 401 and lower mesh plate 402 are both annular in shape, and the upper mesh plate 401 and lower mesh plate 402 are evenly distributed with a number of water passage holes so that the sprayed water can drip down fully.

[0066] Optionally, in some embodiments, multiple partitions 404 are fixedly arranged in a ring between the upper mesh plate 401 and the lower mesh plate 402. The partitions 404 divide the filling cavity 4 between the upper mesh plate 401 and the lower mesh plate 402 into multiple independent areas. Filler material 403 is provided in the area between the partitions 404. The split structure facilitates the installation and maintenance of filler material 403.

[0067] Optionally, in some embodiments, baffles are provided at the outer diameter edges on both sides of the upper mesh plate 401 and the lower mesh plate 402, and the two baffles, the upper mesh plate 401 and the lower mesh plate 402 form a filling cavity 4.

[0068] Please refer to Figure 1In some embodiments, the cross-section of the air intake cavity 6 is conical, and an air intake fan 601 is provided inside the air intake cavity 6 and is arranged coaxially with the air duct 8. When the air is cooled, the air intake fan 601 is turned on to draw in the cold air from the outside. The conical shape of the air intake cavity 6 can reduce the resistance when the air flows. The tower body 1 is provided with a number of air inlets 602 that are connected to the air intake cavity 6. The number of air inlets 602 are arranged in a circular array along the axis of the air duct 8.

[0069] Optionally, in some embodiments, a filter structure is provided at the air inlet 602 to filter the incoming air and prevent damage to the exhaust fan 601.

[0070] In the above embodiments, the filter structure is filter cotton or filter screen, which can prevent foreign objects or living things from entering the interior.

[0071] Please refer to Figure 1 In some embodiments, the tower body 1 is provided with a spraying assembly 10, which includes a plurality of nozzles 1001 at the top of the heat exchange tube 201. The nozzles 1001 evenly disperse the sprayed water onto the heat exchange tube 201.

[0072] Optionally, in some embodiments, the tower body 1 is also provided with a rotating shaft 905, which is a hollow shaft. Several water distribution pipes are connected to the rotating shaft 905, and several nozzles 1001 are installed at the ends of the water distribution pipes. The tower body 1 is also provided with a motor that drives the rotating shaft 905 to rotate. Therefore, in use, the rotating motor controls the rotating shaft 905 to rotate, thereby driving several nozzles 1001 to rotate along the axis of the tower body 1, further improving the uniformity of the spray water and improving the heat exchange and cooling effect on the heat exchange tube 201.

[0073] Please refer to Figure 1 In some embodiments, the spraying assembly 10 further includes a water pump 1003 and a water supply pipe 1002. The water pump 1003 is installed on the tower body 1, and the inlet of the water pump 1003 is connected to the water collection chamber 5. The two ends of the water supply pipe 1002 are connected to the nozzle 1001 and the outlet of the water pump 1003, respectively. That is to say, the spray water in the water collection chamber 5 can be reused by the water pump 1003, and the water pump 1003 can also provide pressure to the high-pressure jet of the nozzle 1001.

[0074] Optionally, in some embodiments, the water pump 1003 may be a high-pressure water pump 1003, and the water supply pipe 1002 may be located outside the tower body 1.

[0075] Please refer to Figure 1 In some embodiments, the spraying assembly 10 further includes a filter plate 1004, which is placed on top of the water collection chamber 5 and installed on the tower body 1. The filter plate 1004 filters the spray water after heat exchange to avoid affecting the water pump 1003.

[0076] Optionally, in some embodiments, the water collection cavity 5 is formed by a groove at the bottom of the tower body 1, specifically, by an annular groove plate provided at the bottom of the tower body 1.

[0077] Please refer to Figure 1 In some embodiments, the tower body 1 is also provided with a connecting cavity 3, which is located between the heat exchange cavity 2 and the filling cavity 4. The air duct 8 is provided with a number of third air vents 803 that communicate with the connecting cavity 3. The reversing component 9 also includes a number of second baffles 902 that correspond one-to-one with the positions of the third air vents 803. Therefore, in use, the connecting cavity 3 allows air to enter the connecting cavity 3 through the third air vents 803, and then contact the heat exchange tube 201 upwards through the connecting cavity 3, thereby achieving air cooling of the heat exchange tube 201 in more directions and improving the heat exchange efficiency.

[0078] Optionally, in some embodiments, a surrounding plate 301 is provided on the side of the connecting cavity 3 away from the air duct 8 to enclose the connecting cavity 3, so as to guide the airflow upward through the heat exchange tube 201 and improve the heat exchange efficiency.

[0079] In the above embodiment, the enclosure is a plate-shaped structure, and the enclosure is inclined towards the air guide duct 8 so that the enclosure guides the air towards the heat exchange pipe 201, thereby improving the airflow through the heat exchange pipe 201.

[0080] In other embodiments, an air guide plate may be installed on the air duct 8. The air guide plate is located at the bottom of the third air duct 803. The air guide plate is used to guide the air towards the heat exchange tube 201, thereby improving the airflow through the heat exchange tube 201.

[0081] Please refer to Figure 1 In some embodiments, the reversing assembly 9 further includes a connector 903 disposed within the air duct 8. The connector 903 is used to connect the first baffle plate 901 and the second baffle plate 902. When the first baffle plate 901 is in the state of closing the second air vent 802, the third air vent 803 is in the state of communicating with the filling cavity 4. When the second baffle plate 902 is in the state of closing the third air vent 803, the second air vent 802 is in the state of communicating with the connecting cavity 3. That is to say, the connecting cavity 3 is only connected to the air duct 8 during the air cooling process. At the same time, during the air cooling process, the air will not pass through the filling cavity 4, thereby reducing air loss. In this mode, the airflow is introduced bidirectionally from the inner side and bottom of the heat exchange cavity 2, increasing the airflow through the heat exchange cavity 2, thereby improving its heat exchange efficiency.

[0082] Optionally, in some embodiments, the connector 903 includes a rotating shaft 905 coaxially arranged with the tower body 1, and a plurality of connecting rods mounted on the rotating shaft 905, which are respectively connected to a plurality of corresponding wind baffles to realize the adjustment of the position of the wind baffles.

[0083] In other embodiments, the wind deflector is formed of a cylindrical structure with connecting holes on the wind deflector corresponding to several air guides. Therefore, by rotating the wind deflector, the opening and closing of several air guides can be controlled.

[0084] Please refer to Figure 1 In some embodiments, the reversing assembly 9 further includes a drive element 904, which is installed on the tower body 1. The drive element 904 is used to control the connection element 903 to rotate along the axis of the air duct 8. In other words, the automatic control of the closure of the air duct is achieved through the drive element 904.

[0085] Optionally, in some embodiments, the drive element 904 is a motor, which is used to control the rotation of the shaft 905. It also includes a control system, and the motor and temperature sensor are electrically connected to the control system, so that the tower body 1 can automatically control the switching of the air vents in different modes.

[0086] Please refer to Figure 1 In some embodiments, several grid plates 11 are hinged at the exhaust port 7 in a parallel manner along the axis of the air guide duct 8. The grid plates 11 are hinged to the tower body 1. By rotating the grid plates 11, the external wind direction can be guided, so that the external wind can circulate along the outer wall of the tower body 1, and prevent the external wind from entering the tower body 1 through the exhaust port 7 and affecting the internal airflow discharge.

[0087] Optionally, in some embodiments, the minimum spacing between two adjacent grid plates 11 is less than the width of the grid plate 11.

[0088] Optionally, in some embodiments, a limiting block 1102 is installed at the end of the grid plate 11 near the tower body 1, and a limiting member 1101 for limiting the maximum rotation angle of the grid plate 11 is installed on the tower body 1 to limit the maximum rotation angle of the grid plate 11.

[0089] In other words, the key point of this invention is that: the tower body 1 is provided with an exhaust port 7 communicating with the heat exchange chamber 2, and an air guide pipe 8 is provided inside the tower body 1. The air guide pipe 8 passes through the heat exchange chamber 2, the filling chamber 4, and the water collection chamber 5 in sequence, and communicates with the air intake chamber 6. The air guide pipe 8 is provided with several first air guide ports 801 communicating with the heat exchange chamber 2 and several second air guide ports 802 communicating with the filling chamber 4. The end of the air guide pipe 8 away from the air intake chamber 6 is closed. That is to say, the air guide pipe 8 introduces the cold air entering the air intake chamber 6 into the heat exchange chamber 2 through the first air guide ports 801 to achieve the heat exchange and cooling function. The hot air after heat exchange is discharged in time through the exhaust port 7. The reversing component 9 includes several first baffles 901 that correspond one-to-one with the positions of the second air vents 802. The several first baffles 901 are slidably installed on the air duct 8. When only air is used for heat dissipation, the several first baffles 901 block the positions of the second air vents 802 one-to-one. Therefore, the air can only enter the heat exchange chamber 2 through the first air vents 801, avoiding the obstruction of airflow in the filling chamber 4 when it is not in operation, increasing the airflow intensity through the heat exchange chamber 2, thereby improving the air cooling effect, increasing the critical temperature for switching the spray mode, reducing the proportion of spray mode duration, and thus improving the water-saving capacity of the cooling tower.

[0090] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0091] The present invention provides a detailed description of a water-saving closed-loop cooling tower. Specific examples have been used to illustrate the principles and implementation methods of the invention. The descriptions of these embodiments are merely illustrative and are intended to aid in understanding the method and core concepts of the invention. It should be noted that those skilled in the art can make various improvements and modifications to the invention without departing from its principles, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A water-saving closed-loop cooling tower, characterized in that, include: The tower body (1) is provided with a heat exchange chamber (2), a filling chamber (4), a water collection chamber (5) and an air duct (6) arranged from top to bottom. The tower body (1) is provided with an exhaust port (7) that communicates with the heat exchange chamber (2). The air duct (6) communicates with the outside. The air duct (8) passes through the heat exchange chamber (2), the filling chamber (4) and the water collection chamber (5) in sequence, and is connected to the air intake chamber (6). The air duct (8) is provided with a number of first air inlets (801) connected to the heat exchange chamber (2) and a number of second air inlets (802) connected to the filling chamber (4). The end of the air duct (8) away from the air intake chamber (6) is closed. The reversing assembly (9) includes a plurality of first baffles (901) that correspond one-to-one with the positions of the second air duct (802), and the plurality of first baffles (901) are slidably installed on the air duct (8).

2. The water-saving closed-loop cooling tower according to claim 1, characterized in that, The heat exchange chamber (2) is provided with a heat exchange tube (201), the filling chamber (4) is provided with a filling material (403), and an exhaust fan is installed at the exhaust port (7).

3. The water-saving closed-loop cooling tower according to claim 1, characterized in that, The cross-section of the air duct (6) is conical. The air duct (6) is equipped with an air duct fan (601) and is arranged coaxially with the air duct (8). The tower body (1) is provided with several air inlets (602) that are connected to the air duct (6). The several air inlets (602) are arranged in a circular array along the axis of the air duct (8).

4. The water-saving closed-loop cooling tower according to claim 2, characterized in that, The tower body (1) is provided with a spraying assembly (10), which includes a plurality of nozzles (1001) located at the top of the heat exchange tube (201).

5. The water-saving closed-loop cooling tower according to claim 4, characterized in that, The spraying assembly (10) also includes: A water pump (1003) is installed on the tower body (1), and the inlet of the water pump (1003) is connected to the water collection chamber (5); Water supply pipe (1002), the two ends of which are connected to the nozzle (1001) and the outlet of the water pump (1003), respectively.

6. The water-saving closed-loop cooling tower according to claim 5, characterized in that, The spraying assembly (10) also includes: A filter plate (1004) is placed on top of the water collection chamber (5) and installed on the tower body (1).

7. The water-saving closed-loop cooling tower according to any one of claims 1-6, characterized in that, The tower body (1) is also provided with a connecting cavity (3), which is located between the heat exchange cavity (2) and the filling cavity (4). The air duct (8) is provided with a number of third air ducts (803) that communicate with the connecting cavity (3). The reversing assembly (9) also includes a number of second baffles (902) that correspond one-to-one with the positions of the third air ducts (803).

8. The water-saving closed-loop cooling tower according to claim 7, characterized in that, The commutation assembly (9) also includes: Connector (903), the connector (903) is disposed in the air guide pipe (8), the connector (903) is used to connect the first wind baffle (901) and the second wind baffle (902). When the first wind baffle (901) is in the state of closing the second air guide port (802), the third air guide port (803) is in the state of communicating with the filling cavity (4). When the second wind baffle (902) is in the state of closing the third air guide port (803), the second air guide port (802) is in the state of communicating with the connecting cavity (3).

9. The water-saving closed-loop cooling tower according to claim 8, characterized in that, The commutation assembly (9) also includes: A drive unit (904) is installed on the tower body (1) and is used to control the connection (903) to rotate along the axis of the air duct (8).

10. The water-saving closed-loop cooling tower according to claim 9, characterized in that, At the exhaust port (7), several grid plates (11) are hinged in parallel to the axis of the air guide pipe (8). The grid plates (11) are hinged to the tower body (1). The minimum distance between two adjacent grid plates (11) is less than the width of the grid plate (11). A limiting member (1101) is installed on the tower body (1) to limit the maximum rotation angle of the grid plates (11).

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