CN216558392U - Closed cooling tower - Google Patents

Abstract

The utility model belongs to the technical field of cooling towers, and particularly relates to a closed cooling tower which comprises a shell, a water tank, a heat dissipation device and a spraying device, wherein the shell is provided with a water inlet and a water outlet; the top of the shell is provided with two air outlets, the bottom of the shell is provided with two air inlets, the two air outlets and the two air inlets are mutually communicated, the shell is respectively provided with a water inlet and a water outlet, the water inlet and the water outlet are respectively communicated with the water inlet end and the water outlet end of the heat dissipation device, the top of the shell is also provided with four spraying water inlets, the four spraying water inlets are respectively communicated with a spraying device, the spraying device surrounds the heat dissipation device, the water tank is arranged at the bottom of the shell, the bottom of the other side wall of the shell is also provided with two spraying water outlets, the water tank is communicated with the inner sides of the two spraying water outlets, and the two spraying water outlets are communicated with the four spraying water inlets through a backflow device; spray set among this device can cover heat abstractor comprehensively, carries out the full aspect to heat abstractor and sprays, effectively cools off the circulating water, improves the cooling effect.

Description

closed cooling tower

technical field

The utility model belongs to the technical field of cooling towers, in particular to a closed cooling tower.

Background technique

The closed cooling tower is a deformation and development of the traditional cooling tower. It is actually a combination of an evaporative cooling tower, a cooler and a wet cooling tower. It is a horizontal evaporative cooling tower. The process fluid flows through the tube and the air flows outside the tube, and the two do not touch each other. After the water in the reservoir at the bottom of the tower is extracted by the circulating pump, it is sent to the outside of the pipe to be sprayed evenly. It is not in contact with process fluid hot water or refrigerant and air outside the tube, and it becomes a closed cooling tower, which enhances the effect of heat and mass transfer by spraying water.

Closed cooling towers are suitable for various cooling systems that require high circulating water quality, and have application prospects in power, chemical, steel, food and many industrial sectors. On the other hand, compared with the air-cooled heat exchanger, the evaporative cooling tower utilizes the latent heat of evaporation of the water on the lower side of the tube to significantly enhance the heat and mass transfer on the air side, which also has obvious advantages.

The cooling process of the existing closed cooling tower usually uses a spray device to spray the water body on the cooling coil, so as to realize the cooling of the circulating water in the cooling coil; however, the spray in the existing closed cooling tower The design of the shower device is not reasonable, and it cannot effectively spray the cooling coil in an all-round way, resulting in the inability of the cooling coil to achieve all-round heat exchange, resulting in low heat exchange efficiency and insufficient heat dissipation of the circulating water.

Utility model content

The purpose of the present utility model is to provide a closed cooling tower, which aims to solve the problem that the structure design of the spray device in the closed cooling tower in the prior art is unreasonable, resulting in the inability of circulating water to conduct good heat dissipation and reducing the cooling effect. technical problem.

In order to achieve the above purpose, the embodiment of the present invention provides a closed cooling tower, which includes a shell, a water tank, a heat sink and a spray device; the top of the shell is provided with two penetrating two ends in the vertical direction. an air outlet, the bottom of the casing is provided with two air inlets that penetrate both ends in the vertical direction, the two air outlets and the two air inlets are connected to each other, and the heat dissipation device is arranged on the casing In the body, the same side wall of the casing is respectively provided with a water inlet and a water outlet that penetrate both ends of the side surface, and the water inlet and the water outlet are respectively communicated with the water inlet and outlet of the heat sink, The top of the casing is also provided with four spray water inlets that run through both ends in the vertical direction, and the inner sides of the four spray water inlets are all communicated with the spray device, and the spray device surrounds the surrounding area. In the heat dissipation device, the water tank is arranged at the bottom of the casing and is used to collect the water mist sprayed by the spray device, and the bottom of the other side wall of the casing is also provided with two penetrating direction of the side wall. The spray drains at both ends, the water tank is communicated with the inside of the two spray drains, and the outside of the two spray drains and the outside of the four spray inlets are communicated through a return device .

Optionally, the heat dissipation device includes a first heat dissipation coil, a second heat dissipation coil and a heat dissipation connection pipe; the first heat dissipation coil and the second heat dissipation coil are fixedly connected to the shell through a fixing frame. Inside the body, the heat dissipation connecting pipe communicates with the first heat dissipation coil and the second heat dissipation coil, the first heat dissipation coil is provided with the water inlet end, and the water inlet is connected to the first heat dissipation coil. The water inlet end provided on the coil is in communication, the second cooling coil is provided with the water outlet, and the water outlet is communicated with the water outlet provided on the second cooling coil.

Optionally, the first heat dissipation coil and the second heat dissipation coil are arranged in an upper and lower layered state.

Optionally, the spray device includes a main water supply pipe, a first branch pipe, a second branch pipe and a third branch pipe; the main water supply pipe is communicated with the inner sides of the four spray water inlets, and the first branch pipe A branch pipe, the second branch pipe and the third branch pipe are all communicated with the main water supply pipe, and the first branch pipe, the second branch pipe and the third branch pipe are sequentially distributed in sequence In the vertical direction of the main water supply pipe, the first branch pipe is located at the top of the first heat dissipation coil, and the second branch pipe is located on the first heat dissipation coil and the second heat dissipation plate between pipes, the third shunt pipe is located at the bottom of the second heat dissipation coil, and the spray range of the first shunt pipe, the second shunt pipe and the third shunt pipe surrounds the first shunt pipe A cooling coil and the second cooling coil.

Optionally, a plurality of rotating nozzles are installed on the first branch pipe, the second branch pipe and the third branch pipe, and the spray direction of each of the rotating nozzles on the first branch pipe is towards the top of the first heat dissipation coil, the spray direction of each of the rotating nozzles on the second shunt pipe is toward the bottom of the first heat dissipation coil and the top of the second heat dissipation coil, The spraying direction of each of the rotating spray heads located on the third shunt pipe is toward the bottom of the second cooling coil.

Optionally, the rotating nozzles located on the first branch pipe, the second branch pipe and the third branch pipe are equally spaced.

Optionally, the return device includes two return pipes and two return pumps; one end of the two return pipes is respectively connected with the outer sides of the two spray water outlets, and the other ends of the two return pipes are connected with the four return pipes respectively. The outside of the spray water inlet is communicated, and the two return pumps are respectively arranged on the two return pipes for pumping water back.

Optionally, the closed cooling tower further includes a water inlet connection pipe; the water inlet connection pipe is fixedly connected to the outer side wall of the shell, and one end of the water inlet connection pipe is communicated with the water inlet , the other end of the water inlet connection pipe is communicated with external equipment.

Optionally, the closed cooling tower further includes a water outlet connection pipe; the water outlet connection pipe is fixedly connected to the outer side wall of the casing, and one end of the water outlet connection pipe is communicated with the water outlet. The other end of the water outlet connecting pipe is communicated with external equipment.

Optionally, the closed cooling tower further includes two dustproof covers; the two dustproof covers are respectively fixedly connected to the tops of the inner sides of the two air outlets.

The above-mentioned one or more technical solutions in the enclosed cooling tower provided by the embodiment of the present invention have at least one of the following technical effects: when the enclosed cooling tower of the present invention is in use, the circulating water introduced by the external equipment flows from the water inlet. Enter into the cooling device in the casing, and a spraying device is installed in the casing. Since the spraying device surrounds the cooling device, the spraying device can evenly spray the water pre-stored in the water tank on the cooling device. The circulating water of the device can transfer heat to the water in the shell, achieve good heat exchange, and effectively dissipate heat from the circulating water. The water is discharged from one spray outlet and the water is drawn back to the four spray inlets through the return device, so that the uninterrupted operation of the spray device is realized, the cooling device is always sprayed, and finally the circulating water is discharged from the water outlet back to the external equipment. Continue to work, the spray device in the device can fully cover the heat dissipation device, spray the heat dissipation device in all directions, effectively cool the circulating water, and improve the cooling effect.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only for the present utility model. For some novel embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is a partial cross-sectional view of a closed cooling tower provided by an embodiment of the present invention.

FIG. 2 is a schematic structural diagram of a closed cooling tower provided by an embodiment of the present invention.

3 is a schematic structural diagram of a heat dissipation device of a closed cooling tower provided by an embodiment of the present invention.

4 is a schematic structural diagram of a rotary nozzle of a closed cooling tower provided by an embodiment of the present invention.

Among them, each reference sign in the figure:

10. Shell; 11. Air outlet; 12. Air inlet;

13. Water inlet; 14. Water outlet; 15. Spray water inlet;

16. Spray outlet; 20. Water tank; 30. Heat sink;

31. The first cooling coil; 32. The second cooling coil; 33. The cooling connecting pipe;

40. Spray device; 41. Main water supply pipe; 42. First shunt pipe;

43, the second shunt pipe; 44, the third shunt pipe; 50, the rotating nozzle;

60, return device; 61, return pipeline; 62, return pump;

70, water inlet connection pipe; 80, water outlet connection pipe; 90, dust cover;

311, the water inlet; 321, the water outlet.

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to be used to explain the embodiments of the present invention, but should not be construed as a limitation of the present invention.

In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical" The orientation or positional relationship indicated by "straight", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the embodiments of the present invention and simplified description, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more, unless otherwise expressly and specifically defined.

In the embodiments of the present utility model, unless otherwise explicitly specified and limited, terms such as "installation", "connected", "connected", "fixed" should be understood in a broad sense, for example, it may be a fixed connection or a Detachable connection or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium, internal communication between two elements or interaction between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific situations.

In an embodiment of the present invention, as shown in FIGS. 1 to 2 , a closed cooling tower is provided, which includes a casing 10 , a water tank 20 , a heat sink 30 and a spraying device 40 ; the top of the casing 10 is There are two air outlets 11 extending through both ends in the vertical direction. The bottom of the casing 10 is provided with two air inlets 12 extending through both ends in the vertical direction. The two air outlets 11 and the two The air inlets 12 are connected with each other, the heat dissipation device 30 is arranged in the casing 10, and the same side wall of the casing 10 is respectively provided with a water inlet 13 and a water outlet 14 that penetrate both ends of the side surface, so The water inlet 13 and the water outlet 14 are respectively communicated with the water inlet end 311 and the water outlet end 321 of the heat dissipation device 30, and the top of the housing 10 is also provided with four sprays running through both ends in the vertical direction. The water inlets 15 and the inner sides of the four spray water inlets 15 are all communicated with the spray device 40 , and the spray device 40 surrounds the heat sink 30 . The bottom is also used to collect the water mist sprayed by the spray device 40. The bottom of the other side wall of the casing 10 is also provided with two spray drains 16 that penetrate both ends of the side wall in the direction. The water tank 20 It communicates with the inner sides of the two spray water outlets 16 , and the outer sides of the two spray water outlets 16 communicate with the outer sides of the four spray water inlets 15 through a return device 60 .

Specifically, when the closed cooling tower of the present invention is in use, the circulating water introduced by the external equipment enters the heat dissipation device 30 in the casing 10 from the water inlet 13, and the casing 10 is equipped with a spray device 40. The spray device 40 surrounds the heat sink 30, then the spray device 40 can evenly spray the water pre-stored in the water tank 20 on the heat sink 30, so that the circulating water through the heat sink 30 can transfer heat to the shell The water in the water tank 10 realizes good heat exchange and effectively dissipates the circulating water. The water mist sprayed by the spray device 40 finally drips into the water tank 20, and the water in the water tank 20 is discharged from the two spray water outlets 16. And through the return device 60, the water is drawn back into the four spray water inlets 15, so that the uninterrupted operation of the spray device 40 is realized, and the cooling device 30 is always sprayed, and finally the circulating water is discharged from the water outlet 14 back to the external equipment. Continuing to work, the spraying device 40 in the device can fully cover the cooling device 30, spray the cooling device 30 in all directions, effectively cool the circulating water, and improve the cooling effect.

In another embodiment of the present invention, as shown in FIGS. 1 to 3 , the heat dissipation device 30 includes a first heat dissipation coil 31 , a second heat dissipation coil 32 and a heat dissipation connecting pipe 33 ; the first heat dissipation coil Both the pipe 31 and the second heat dissipation coil 32 are fixedly connected to the housing 10 through a fixing frame, and the heat dissipation connection pipe 33 communicates with the first heat dissipation coil 31 and the second heat dissipation coil 32, The first cooling coil 31 is provided with the water inlet end 311, the water inlet 13 is communicated with the water inlet 311 opened on the first cooling coil 31, and the second cooling coil is The water outlet 321 is opened on the 32 , and the water outlet 14 communicates with the water outlet 321 opened on the second cooling coil 32 . Specifically, if the water inlet 13 is communicated with the water inlet end 311 provided on the first heat dissipation coil 31, the circulating water introduced by the external equipment will enter the first heat dissipation coil 31, and the first heat dissipation coil 31 has a plurality of the first heat dissipation pipe, then the spray device 40 sprays the plurality of first heat dissipation pipes at the same time, which is conducive to the rapid heat dissipation of the circulating water. , the second heat dissipation coil 32 also has a plurality of second heat dissipation pipes, so the spray device 40 sprays the plurality of second heat dissipation pipes at the same time, which is conducive to the rapid heat dissipation of the circulating water and improves the cooling effect of the circulating water.

In another embodiment of the present invention, as shown in FIGS. 1 to 3 , the first heat dissipation coil 31 and the second heat dissipation coil 32 are arranged in an upper and lower layered state. Specifically, some parts of the spray device 40 can extend between the first heat dissipation coil 31 and the second heat dissipation coil 32, which is beneficial to spray the first heat dissipation coil 31 and the second heat dissipation coil 32 at the same time. Increase cooling rate.

In another embodiment of the present invention, as shown in FIGS. 1-3 , the spray device 40 includes a main water supply pipe 41, a first branch pipe 42, a second branch pipe 43 and a third branch pipe 44; The main water supply pipe 41 communicates with the inner sides of the four spray inlets 15 , and the first branch pipe 42 , the second branch pipe 43 and the third branch pipe 44 are all connected to the main water supply pipe 41 . The first branch pipe 42, the second branch pipe 43 and the third branch pipe 44 are sequentially distributed in the vertical direction of the main water supply pipe 41, and the first branch pipe 42 is located in the vertical direction of the main water supply pipe 41. On the top of the first heat dissipation coil 31, the second branch pipe 43 is located between the first heat dissipation coil 31 and the second heat dissipation coil 32, and the third branch pipe 44 is located on the first heat dissipation coil 31 and the second heat dissipation coil 32. The bottom of the two cooling coils 32, the spraying range of the first shunt pipe 42, the second shunt pipe 43 and the third shunt pipe 44 surrounds the first cooling coil 31 and the second cooling pipe Coil 32. Specifically, the first shunt pipe 42 is located at the top of the first cooling coil 31, so when the first shunt pipe 42 is sprayed, the top of the first cooling coil 31 can be cooled, and the second shunt pipe 43 is located at the top of the first cooling coil 31. Between the first heat dissipation coil 31 and the second heat dissipation coil 32, when the second shunt pipe 43 is sprayed, the bottom of the first heat dissipation coil 31 and the top of the second heat dissipation coil 32 can be cooled. , the third shunt pipe 44 is located at the bottom of the second heat dissipation coil 32, then when the third shunt pipe 44 is sprayed, it can cool the bottom of the third heat dissipation coil. In this way, the first shunt pipe 42, the first The spraying range of the second branch pipe 43 and the third branch pipe 44 surrounds the first heat dissipation coil 31 and the second heat dissipation coil 32 , so that the first heat dissipation coil 31 and the second heat dissipation coil 32 can be fully covered. Ground spray to improve cooling effect.

In another embodiment of the present invention, as shown in FIGS. 1 to 4 , several rotating nozzles 50 are installed on the first branch pipe 42 , the second branch pipe 43 and the third branch pipe 44 . , the spray direction of each of the rotating nozzles 50 on the first branch pipe 42 is toward the top of the first cooling coil 31 , and the spray direction of each of the rotating nozzles 50 on the second branch pipe 43 The spray direction is toward the bottom of the first heat dissipation coil 31 and the top of the second heat dissipation coil 32 , and the spray direction of each of the rotating spray heads 50 located on the third branch pipe 44 is toward the first heat dissipation coil 31 . Two cooling coils 32 at the bottom. Specifically, the first branch pipe 42 , the second branch pipe 43 and the third branch pipe 44 are each equipped with a plurality of rotating nozzles 50 , then the first branch pipe 42 , the second branch pipe 43 and the third branch pipe 44 spray out The water body will be output through multiple rotating nozzles 50, so that the water body will be atomized by multiple rotating nozzles 50, and the water body will become water mist after atomization, which can more comprehensively cover the first cooling coil 31 and the first cooling coil 31 and the first cooling coil 31. On the second cooling coil 32, the cooling effect is more effectively improved.

In another embodiment of the present invention, as shown in FIGS. 1 to 2 and 4 , each of the The rotating spray heads 50 are evenly distributed. Specifically, the plurality of rotating nozzles 50 located on the first branch pipe 42 , the second branch pipe 43 and the third branch pipe 44 are evenly distributed, which is beneficial to ensure uniform cooling effect.

In another embodiment of the present invention, as shown in FIGS. 1 to 3 , the return device 60 includes two return pipes 61 and two return pumps 62 ; The outside of the spray water outlet 16 is communicated with, and the other ends of the two return pipes 61 are connected with the outside of the four spray water inlets 15 respectively. The two return pumps 62 are respectively arranged on the two return pipes 61 to use In pumped water return. Specifically, the water in the housing 10 is discharged from the two spray water outlets 16 after the first round of spraying, and the two spray water outlets 16 are respectively connected to the two return pipes 61 , which are both installed on the two return pipes 61 . There is a return pump 62. When the return pump 62 is started, the water in the two return pipes 61 will be pumped to the four spray inlets 15, so that the second round of spray can be performed, and the first cooling plate can be continuously sprayed. The pipe 31 and the second cooling coil 32 are squeezed by circulating water for cooling.

In another embodiment of the present invention, as shown in FIGS. 1 to 2 , the closed cooling tower further includes a water inlet connection pipe 70 ; the water inlet connection pipe 70 is fixedly connected to the outer side of the casing 10 . On the wall, one end of the water inlet connection pipe 70 is communicated with the water inlet 13, and the other end of the water inlet connection pipe 70 is communicated with external equipment. Specifically, the water inlet 13 and the external equipment are communicated through the water inlet connection pipe 70, which can prevent water leakage.

In another embodiment of the present invention, as shown in FIGS. 1 to 2 , the closed cooling tower further includes a water outlet connection pipe 80 ; the water outlet connection pipe 80 is fixedly connected to the outer side wall of the shell 10 . , and one end of the water outlet connection pipe 80 is communicated with the water outlet 14 , and the other end of the water outlet connection pipe 80 is communicated with external equipment. Specifically, the water outlet 14 and the external equipment are communicated through the water outlet connection pipe 80, which can prevent water leakage.

In another embodiment of the present invention, as shown in Figures 1-2, the enclosed cooling tower further includes two dust covers 90; the two dust covers 90 are fixedly connected to the two The top inside the air outlet 11. Specifically, a dust cover 90 is installed on the top of the inner side of the two air outlets 11 , and the two dust covers 90 can prevent dust from entering the housing 10 and causing pollution to components or water sources.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection of the utility model.

Claims (10)

1. A closed cooling tower, characterized in that: comprises a shell, a water tank, a heat dissipation device and a spraying device; the top of the shell is provided with two air outlets which penetrate through two ends of the shell in the vertical direction, the bottom of the shell is provided with two air inlets which penetrate through two ends of the shell in the vertical direction, the two air outlets and the two air inlets are communicated with each other, the heat dissipation device is arranged in the shell, the same side wall of the shell is respectively provided with a water inlet and a water outlet which penetrate through two ends of the side surface of the shell, the water inlet and the water outlet are respectively communicated with the water inlet end and the water outlet end of the heat dissipation device, the top of the shell is also provided with four spraying water inlets which penetrate through two ends of the shell in the vertical direction, the inner sides of the four spraying water inlets are respectively communicated with the spraying device, the spraying device surrounds the heat dissipation device, the water tank is arranged at the bottom of the shell and is used for collecting water mist sprayed by the spraying device, and the bottom of the other side wall of the shell is also provided with two spraying water outlets which penetrate through two ends of the side wall of the shell in the side wall direction, the water tank is communicated with the inner sides of the two spraying water outlets, and the outer sides of the two spraying water outlets are communicated with the outer sides of the four spraying water inlets through a backflow device.

2. The enclosed cooling tower of claim 1, wherein: the heat dissipation device comprises a first heat dissipation coil, a second heat dissipation coil and a heat dissipation connecting pipe; first heat dissipation coil with second heat dissipation coil all through mount fixed connection in the casing, heat dissipation connecting pipe intercommunication first heat dissipation coil with second heat dissipation coil, seted up on the first heat dissipation coil the end of intaking, the water inlet with set up on the first heat dissipation coil the end intercommunication of intaking, set up on the second heat dissipation coil the play water end, the delivery port with set up on the second heat dissipation coil the play water end intercommunication.

3. The enclosed cooling tower of claim 2, wherein: the first heat dissipation coil and the second heat dissipation coil are arranged in an up-down layered state.

4. The enclosed cooling tower of claim 2, wherein: the spraying device comprises a main water supply pipe, a first shunt pipe, a second shunt pipe and a third shunt pipe; the utility model provides a cooling water supply pipe, including water inlet, water supply pipe, first shunt tubes, second shunt tubes and third shunt tubes all with the utility model provides a cooling water supply pipe, first shunt tubes second shunt tubes with third shunt tubes distributes in proper order in the vertical direction of utility model, first shunt tubes is located first heat dissipation coil's top, second shunt tubes is located first heat dissipation coil with between the second heat dissipation coil, third shunt tubes is located the bottom of second heat dissipation coil, first shunt tubes second shunt tubes with the range of spraying of third shunt tubes surrounds first heat dissipation coil with second heat dissipation coil.

5. The enclosed cooling tower of claim 4, wherein: the first shunt tube, the second shunt tube and the third shunt tube are all provided with a plurality of rotary nozzles, the spray direction of each rotary nozzle on the first shunt tube faces to the top of the first heat dissipation coil, the spray direction of each rotary nozzle on the second shunt tube faces to the bottom of the first heat dissipation coil and the top of the second heat dissipation coil, and the spray direction of each rotary nozzle on the third shunt tube faces to the bottom of the second heat dissipation coil.

6. The enclosed cooling tower of claim 5, wherein: the rotary spray heads positioned on the first shunt pipe, the second shunt pipe and the third shunt pipe are distributed at equal intervals.

7. The enclosed cooling tower according to any one of claims 1 to 6, wherein: the reflux device comprises two reflux pipelines and two reflux pumps; one end of each of the two backflow pipelines is communicated with the outer sides of the spraying water outlets respectively, the other ends of the two backflow pipelines are communicated with the outer sides of the four spraying water inlets respectively, and the two backflow pumps are arranged on the two backflow pipelines respectively and used for pumping water and refluxing.

8. The enclosed cooling tower according to any one of claims 1 to 6, wherein: the closed cooling tower also comprises a water inlet connecting pipe; the water inlet connecting pipe is fixedly connected to the outer side wall of the shell, one end of the water inlet connecting pipe is communicated with the water inlet, and the other end of the water inlet connecting pipe is communicated with external equipment.

9. The enclosed cooling tower according to any one of claims 1 to 6, wherein: the closed cooling tower also comprises a water outlet connecting pipe; the water outlet connecting pipe is fixedly connected to the outer side wall of the shell, one end of the water outlet connecting pipe is communicated with the water outlet, and the other end of the water outlet connecting pipe is communicated with external equipment.

10. The enclosed cooling tower according to any one of claims 1 to 6, wherein: the closed cooling tower also comprises two dustproof covers; and the two dust covers are respectively and fixedly connected to the tops of the inner sides of the two air outlets.

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