Indirect evaporation cooling tower

Abstract

The utility model relates to the field of cooling towers, in particular to an indirect evaporation cooling tower which comprises a tower body, a water inlet is arranged on the upper portion of the tower body, and a water storage tank is arranged at the bottom in the tower body. A first air inlet is formed in the tower body, a second air inlet is formed in the tower body corresponding to the top of the first air inlet, an air outlet is formed in the top of the tower body, and a fan is arranged at the top of the tower body; a filler layer is arranged in the tower body, the top of the filler layer is arranged below the water inlet, and the filler layer is arranged at the top of the first air inlet; a spraying mechanism is arranged on the tower body; a surface air cooler is arranged on the side wall surface of the tower body; the tower body is provided with an air inlet window, and when the air inlet window is in an open state, air enters the tower body through the first air inlet and the second air inlet; when the air inlet window is in a closed state, gas enters the tower body through the second air inlet; the lower portion of the packing layer is provided with a notch which is in the shape of a regular quadrangular frustum pyramid, so that the diameter of the packing layer corresponding to the second air inlet is sequentially reduced from top to bottom, and through the technical scheme, the cooling device has the advantage of improving cooling efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to a cooling tower, especially an indirect evaporative cooling tower. BACKGROUND

[0002] The evaporative cooling tower is a kind of equipment for cooling liquid.In the existing evaporative cooling tower, the liquid to be cooled enters the cooling tower through pipeline, and the cooling water in the cooling tower is sprayed to cool the liquid, and with long-term cooling, the temperature of the spray water in the cooling tower gradually rises, so external air is introduced into the cooling tower, and the spray water and the liquid to be cooled are cooled after the external air is cooled by the filler layer.

[0003] However, when the flow of the liquid to be cooled increases sharply, the cooling efficiency is low by relying on the air cooling and water cooling of the existing cooling tower, and the cooling cannot be completed quickly, so a cooling tower that can still cool quickly when the flow of liquid increases sharply needs to be developed. SUMMARY

[0004] The utility model provides a kind of indirect evaporative cooling tower, solve the technical problem that the cooling efficiency of existing cooling tower is low and cooling effect is poor when liquid flow increases sharply, provide the following technical scheme:

[0005] An indirect evaporative cooling tower includes a tower body, a water inlet is provided on the side wall surface of the upper part of the tower body, a water storage tank is provided on the inner bottom of the tower body, and a water outlet is provided on the bottom of the water storage tank;

[0006] The four surfaces of the tower body corresponding to the top of the water storage tank are each provided with a first air inlet, the four surfaces of the tower body corresponding to the top of the first air inlet are each provided with a second air inlet, an air outlet is provided on the top of the tower body, and a fan is provided on the top of the tower body corresponding to the air outlet;

[0007] A filler layer is provided in the tower body, the top of the filler layer is arranged below the water inlet, and the bottom of the filler layer is arranged on the top of the first air inlet;A spraying mechanism for spraying cooling water to the filler layer is provided on the tower body.

[0008] The feature is that a surface cooler is provided on the side wall surface of the tower body corresponding to each second air inlet, and an air inlet window is provided on the tower body corresponding to each first air inlet, when the air inlet window is in an open state, gas enters the tower body through the first air inlet and the second air inlet, and when the air inlet window is in a closed state, gas enters the tower body through the second air inlet.

[0009] The lower part of the filler layer is provided with a notch, the notch is provided in the shape of a regular quadrangular pyramid platform, so that the diameter of the filler layer corresponding to the second air inlet decreases from top to bottom.

[0010] By adopting the technical scheme, when hot water enters the tower body through the water inlet, the air inlet window and the surface cooler are closed, at this time, external air enters the tower body through the second air inlet, at this time, the external air is cooled by the cooperation of the spraying mechanism and the filler layer, the cooled air moves upward under the suction of the fan, and then the hot water to be cooled is cooled by heat exchange, the preliminarily cooled hot water is cooled again by the spraying cooling water of the spraying mechanism and the filler layer, and finally falls into the water storage tank for use.

[0011] When the amount of hot water to be cooled increases, the air inlet fan can be turned on and the surface cooler can be turned off, at this time, the cooling efficiency is improved by increasing the amount of air entering the tower body, thereby improving the cooling effect of the hot water in the tower body; or the air inlet fan can be turned off and the surface cooler can be turned on, at this time, the air entering the tower body is cooled by the surface cooler, at this time, the temperature of the air used to cool the hot water is lower, thereby increasing the cooling efficiency of the hot water in the tower body, thereby improving the cooling effect.

[0012] When neither the air inlet fan nor the surface cooler can complete the cooling of the hot water, both the air inlet fan and the surface cooler are turned on, which not only increases the amount of air entering the tower body, but also reduces the temperature of the air entering the tower body, thereby increasing the cooling efficiency of the hot water in the tower body, thereby improving the cooling effect.

[0013] Therefore, the cooling tower can improve the cooling efficiency when facing a large amount of hot water, and can effectively ensure the cooling effect.

[0014] Further, the water outlet is communicated with a first water outlet pipe, the other end of the first water outlet pipe extends out of the tower body; a water collector is arranged above the first water outlet pipe in the tower body.

[0015] A first water inlet pipe is arranged in the tower body, the diameter of the first water inlet pipe is consistent with the diameter of the water inlet, one end of the first water inlet pipe is fixedly arranged on the side wall surface of the tower body away from the water inlet, and the other end of the first water inlet pipe extends out of the tower body through the water inlet.

[0016] A plurality of first spraying heads are arranged on the section of the first water inlet pipe in the tower body.

[0017] By adopting the above technical scheme, the water droplets carried away by the air flow in the tower body can be recovered by the water collector, thereby effectively preventing water loss, thereby achieving water saving.

[0018] By arranging the first spraying head, the hot water to be cooled is uniformly sprayed in the tower body, which can increase the contact area of the hot water and the cooling water, thereby improving the cooling efficiency, thereby improving the cooling effect.

[0019] Further, one side of each of the surface coolers corresponds to one of the spraying mechanisms; each of the spraying mechanisms comprises a second water outlet pipe, a spraying pump and a second water inlet pipe; each of the second water outlet pipes is in communication with the water storage tank, and the other end of each of the second water outlet pipes is in communication with a water inlet of the corresponding spraying pump; the water outlet of each of the spraying pumps is in communication with the corresponding second water inlet pipe; the other end of each of the second water inlet pipes is in communication with a third water outlet pipe; the other end of each of the third water outlet pipes extends into the tower body and is fixedly arranged on the inner wall surface of the tower body; each of the third water outlet pipes is arranged below the first water inlet pipe; and a plurality of second spraying heads are arranged on the section of each of the third water outlet pipes located in the tower body.

[0020] Further, each of the surface coolers comprises a cooling medium inlet pipe, a heat exchange pipe and a cooling medium outlet pipe; one end of each of the cooling medium inlet pipes is in communication with the corresponding heat exchange pipe; and the other end of each of the heat exchange pipes is in communication with the corresponding cooling medium outlet pipe.

[0021] Further, each of the second water inlet pipes is in communication with a first branch pipe and a second branch pipe; the other end of each of the first branch pipes is in communication with the corresponding cooling medium inlet pipe; and the other end of each of the second branch pipes is in communication with the corresponding cooling medium outlet pipe.

[0022] Through the above technical solution, when the water temperature in the spraying mechanism is high, the water enters the surface cooler through the first branch pipe, is then cooled by the cold water in the surface cooler, and the cooled water returns to the second water inlet pipe through the second branch pipe, thereby improving the cooling efficiency of the spraying mechanism and the cooling effect.

[0023] Further, each of the second water outlet pipes is provided with a first manual valve, and the section of each of the second water inlet pipes between the first branch pipe and the second branch pipe is provided with a second manual valve.

[0024] Further, each of the cooling medium inlet pipes and the cooling medium outlet pipes is provided with a third manual valve, and each of the first branch pipes and the second branch pipes is provided with a fourth manual valve.

[0025] Through the above technical solution, the flow of water can be adjusted according to the cooling demand in the tower body through the third manual valve and the fourth manual valve, so as to avoid waste and save costs while improving the cooling effect.

[0026] In summary, the present application has the following beneficial effects:

[0027] 1、through the setting of the surface cooler and the air inlet window, when hot water enters the tower body through the water inlet, the air inlet window and the surface cooler are closed, at this time the external air enters the tower body through the second air inlet, at this time the external air is cooled through the cooperation of the spraying mechanism and the filler layer, the cooled air moves upward under the suction of the fan, and then cools the hot water to be cooled through heat exchange, the preliminarily cooled hot water is cooled again by the spraying mechanism and the filler layer, and finally falls into the water storage tank for use;

[0028] When the amount of hot water to be cooled increases, the air inlet fan can be turned on and the surface cooler can be turned off, at this time the cooling efficiency is improved by increasing the amount of air entering the tower body, thereby improving the cooling effect of the hot water in the tower body; the air inlet fan can also be turned off and the surface cooler can be turned on, at this time the air entering the tower body is cooled by the surface cooler, at this time the temperature of the air used to cool the hot water is lower, thereby increasing the cooling efficiency of the hot water in the tower body, thereby improving the cooling effect;

[0029] When the air inlet fan or the surface cooler cannot complete the cooling of the hot water, the air inlet fan and the surface cooler are turned on at this time, which not only increases the amount of air entering the tower body, but also reduces the temperature of the air entering the tower body, thereby increasing the cooling efficiency of the hot water in the tower body, thereby improving the cooling effect; therefore, the cooling tower can improve the cooling efficiency when facing large flow of hot water, and can effectively ensure the cooling effect;

[0030] 2、through the setting of the water collector, the water droplets carried by the air flow in the tower body can be recovered, thereby effectively avoiding water loss, thereby achieving water saving; through the setting of the first spraying head, the hot water to be cooled is uniformly sprayed in the tower body, which can increase the contact area of the hot water and the cooling water, thereby improving the cooling efficiency, thereby improving the cooling effect;

[0031] 3、through the setting of the first branch pipe and the second branch pipe, when the water temperature in the spraying mechanism is high, it enters the surface cooler through the first branch pipe, and is cooled by the cold water in the surface cooler, the cooled water returns to the second water inlet pipe through the second branch pipe, thereby improving the cooling efficiency of the spraying mechanism, thereby improving the cooling effect;

[0032] 4、through the setting of the third manual valve and the fourth manual valve, the flow of water can be adjusted according to the cooling demand in the tower body, thereby avoiding waste and saving cost under the condition of improving the cooling effect. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is a sectional view of an indirect evaporative cooling tower;

[0034] Figure 2 is a structural schematic view of the first air inlet and the second air inlet in an indirect evaporative cooling tower;

[0035] Figure 3 is a structural schematic diagram of a cooling coil in an indirect evaporative cooling tower;

[0036] Figure 4 is a connection schematic diagram of a cooling coil and a spraying mechanism in an indirect evaporative cooling tower;

[0037] Figure 5 is Figure 1 is a partial enlarged view of the ordinal number A;

[0038] In the figure: 1, tower body; 2, water storage tank; 3, first air inlet; 4, second air inlet; 5, fan; 6, filler layer; 7, spraying mechanism; 701, second water outlet pipe; 702, spraying pump; 703, second water inlet pipe; 8, cooling coil; 801, cooling medium inlet pipe; 802, heat exchange pipe; 803, cooling medium outlet pipe; 9, air inlet window; 10, notch; 11, first water outlet pipe; 12, water collector; 13, first water inlet pipe; 14, first spraying head; 15, third water outlet pipe; 16, second spraying head; 17, first branch pipe; 18, second branch pipe; 19, first manual valve; 20, second manual valve; 21, third manual valve; 22, fourth manual valve. DETAILED DESCRIPTION

[0039] The application will be further described below in conjunction with the drawings.

[0040] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application will be further described below in conjunction with specific embodiments.

[0041] In a specific embodiment, reference is made to Figures 1-5The utility model relates to an indirect evaporative cooling tower, including tower body 1, the side wall surface of upper portion of tower body 1 is provided with water inlet, the bottom of tower body 1 is provided with water storage tank 2, and the bottom of water storage tank 2 is provided with water outlet, the top of water storage tank 2 is provided with first air inlet 3 in the four faces of tower body 1 correspondingly, and the top of first air inlet 3 is provided with second air inlet 4 in the four faces of tower body 1 correspondingly, and the top of tower body 1 is provided with air outlet, and the top of tower body 1 is provided with fan 5 in air outlet correspondingly, and the specific structure and installation mode of fan 5 all belong to prior art, and here do not make too much repetition, and fan 5 selects the model that can suck the gas in tower body 1 to the outside of tower body 1, and here do not make too much repetition, be provided with filler layer 6 in tower body 1, and the top of filler layer 6 is arranged below water inlet, and the bottom of filler layer 6 is arranged at the top of first air inlet 3, be provided with the spray mechanism 7 for spraying cooling water to filler layer 6 on tower body 1, and the side wall surface of each second air inlet 4 is provided with surface cooler 8 in tower body 1 correspondingly, and the top of each first air inlet 3 is provided with air inlet window 9 in tower body 1 correspondingly, when air inlet window 9 is in the open state, gas enters tower body 1 through first air inlet 3 and second air inlet 4, when air inlet window 9 is in the closed state, gas enters tower body 1 through second air inlet 4, in this specific embodiment, air inlet window 9 adopts PVC lattice window, and the specific structure, opening and closing of PVC lattice window all belong to prior art, and here do not make too much repetition, and the lower part of filler layer 6 is provided with notch 10, and notch 10 is arranged in the shape of regular square pyramid platform, so that the diameter of filler layer 6 corresponding to second air inlet 4 decreases from top to bottom in turn.

[0042] When hot water enters tower body 1 through water inlet, close air inlet window 9 and surface cooler 8, at this time, external wind body enters tower body 1 through second air inlet 4, at this time, the external wind body is cooled by the cooperation of spray mechanism 7 and filler layer 6, and the cooled wind body moves upward under the suction of fan 5, and then cools the hot water to be cooled by heat exchange, and the preliminarily cooled hot water is cooled again by the spray cooling water of spray mechanism 7 and filler layer 6, and finally falls into water storage tank 2 for use.

[0043] When the water volume of hot water to be cooled increases, air inlet fan can be selected to be opened, and surface cooler 8 is closed, at this time, the cooling efficiency is improved by increasing the air volume entering tower body 1, so that the cooling effect of hot water in tower body 1 is improved, or air inlet fan can be selected to be closed, and surface cooler 8 is opened, at this time, the external wind body is cooled by surface cooler 8 and then enters tower body 1 through second air inlet 4, at this time, the wind body for cooling hot water is lower in temperature, so that the cooling efficiency of hot water in tower body 1 is improved, and the cooling effect is improved.

[0044] When the inlet fan or the surface cooler 8 cannot complete the cooling of the hot water, the inlet fan and the surface cooler 8 are both turned on, which not only increases the amount of air entering the tower body 1, but also reduces the temperature of the air entering the tower body 1, thereby accelerating the cooling efficiency of the hot water in the tower body 1, thereby improving the cooling effect.

[0045] Therefore, the cooling tower can improve the cooling efficiency when facing a large amount of hot water, and effectively ensure the cooling effect.

[0046] As shown in Figure 1 , the water outlet is communicated with a first water outlet pipe 11, the other end of the first water outlet pipe 11 extends out of the tower body 1; a water collector 12 is arranged in the tower body 1 above the first water outlet pipe 11; the water collector 12 can recover the water droplets carried away by the air flow in the tower body 1, thereby effectively preventing water loss, thereby achieving water saving;

[0047] As shown in Figure 1 , a first water inlet pipe 13 is arranged in the tower body 1, the diameter of the first water inlet pipe 13 is consistent with the diameter of the water inlet, one end of the first water inlet pipe 13 is fixedly arranged on the side wall of the tower body 1 away from the water inlet, the other end of the first water inlet pipe 13 extends out of the tower body 1 through the water inlet; a plurality of first spray heads 14 are arranged on the section of the first water inlet pipe 13 located in the tower body 1; the first spray heads 14 uniformly spray the hot water to be cooled in the tower body 1, which can increase the contact area of the hot water and the cooling water, thereby improving the cooling efficiency, thereby improving the cooling effect.

[0048] One side of each surface cooler 8 corresponds to one spraying mechanism 7; each spraying mechanism 7 includes a second water outlet pipe 701, a spraying pump 702 and a second water inlet pipe 703; each second water outlet pipe 701 is in communication with the water storage tank 2, the other end of each second water outlet pipe 701 is in communication with the water inlet of the corresponding spraying pump 702, the water outlet of each spraying pump 702 is in communication with the corresponding second water inlet pipe 703, the other end of each second water inlet pipe 703 is communicated with a third water outlet pipe 15, the other end of each third water outlet pipe 15 extends into the tower body 1 and is fixedly arranged on the inner wall of the tower body 1, each third water outlet pipe 15 is arranged below the first water inlet pipe 13, a plurality of second spray heads 16 are arranged on the section of each third water outlet pipe 15 located in the tower body 1; the two third water outlet pipes 15 arranged oppositely in the tower body 1 are arranged side by side in the tower body 1.

[0049] As shown in Figure 1 , 3As shown, each surface cooler 8 comprises a cooling medium inlet pipe 801, a heat exchange pipe 802 and a cooling medium outlet pipe 803, one end of each cooling medium inlet pipe 801 is communicated with the corresponding heat exchange pipe 802, the other end of each heat exchange pipe 802 is communicated with the corresponding cooling medium outlet pipe 803, there are a plurality of heat exchange pipes 802 in each surface cooler 8, and the two ends of each heat exchange pipe 802 are communicated with the cooling medium inlet pipe 801 and the cooling medium outlet pipe 803 respectively; the specific structure and mounting mode of the surface cooler 8 are prior art, and will not be described in detail here; the surface cooler 8 can be selected as a type with fins arranged on the outer periphery of the heat exchange pipe 8, and will not be described in detail here.

[0050] Each second water inlet pipe 703 is communicated with a first branch pipe 17 and a second branch pipe 18, the other end of each first branch pipe 17 is in communication with the corresponding cooling medium inlet pipe 801, and the other end of each second branch pipe 18 is in communication with the corresponding cooling medium outlet pipe 803; when the water in the spraying mechanism 7 is at a high temperature, it enters the surface cooler 8 through the first branch pipe 17, and is then cooled by the cold water in the surface cooler 8, and the cooled water returns to the second water inlet pipe 703 through the second branch pipe 18, thereby improving the cooling efficiency of the spraying mechanism 7 and improving the cooling effect.

[0051] As shown in Figure 1 Each second water outlet pipe 701 is provided with a first manual valve 19, and the section of each second water inlet pipe 703 between the first branch pipe 17 and the second branch pipe 18 is provided with a second manual valve 20; each cooling medium inlet pipe 801 and cooling medium outlet pipe 803 is provided with a third manual valve 21; each first branch pipe 17 and second branch pipe 18 is provided with a fourth manual valve 22; the flow of water can be adjusted according to the cooling demand in the tower body 1 to avoid waste and save costs while improving the cooling effect.

[0052] Operation process: hot water enters the tower body 1 through the first water inlet pipe 13 and is sprayed in the tower body 1 through the first spraying head 14;

[0053] At this time, the wind in the external environment enters the tower body 1 through the second air inlet 4, and the wind moves upward under the suction of the fan 5, in this process, the second spraying head 16 sprays cooling water to the filler layer 6, thereby reducing the temperature of the wind, when the cooled wind is sucked by the fan 5 to above the filler layer 6, the hot water is cooled by heat exchange, and the cooled water falls into the water storage tank 2, and the cooling water is discharged for use when used;

[0054] With the increase of the water quantity of the hot water to be cooled, one of the air inlet window 9 or the surface cooler 8 can be opened, when the air inlet fan is selected to be opened, the first air inlet 3 can be manually opened, the fan 5 in the external environment enters the tower body 1 through the first air inlet 3, and then the cooling efficiency of the hot water is accelerated; when the surface cooler 8 is selected to be opened, the cooling water is delivered into the cooling medium inlet pipe 801, at this time, the wind body in the external environment exchanges heat with the cooling water in the heat exchange pipe 802 when passing through the surface cooler 8, and then the temperature of the wind body entering the tower body 1 is reduced, so that the cooling efficiency of the hot water is accelerated;

[0055] When the water quantity of the hot water to be cooled continues to increase to the point that one of the air inlet window 9 or the surface cooler 8 cannot effectively cool, at this time, the air inlet fan and the surface cooler 8 are both in the opened state, so that the cooling efficiency is accelerated, and the cooling effect is quickly realized.

[0056] In the description of the utility model, it is necessary to explain that, unless there is definite provision and limitation, the terms "installation", "setting", "connection" and the like should be understood in a broad sense, for example, "connection" can be fixed connection, can also be detachable connection, or integral connection, can be mechanical connection, can also be electrical connection, can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific conditions.

[0057] The utility model has been described above in combination with specific embodiments, but those skilled in the art should know that these descriptions are all exemplary, and are not the limitation of the protection scope of the utility model. Those skilled in the art can make various modifications and changes to the utility model according to the spirit and principle of the utility model, and these modifications and changes are also within the scope of the utility model.

Claims

1. Indirectly evaporative cooling tower, comprising tower body, water inlet is arranged on the side wall surface of the upper part of the tower body, water storage tank is arranged on the inner bottom of the tower body, water outlet is arranged on the bottom of the water storage tank; First air inlet is arranged on the four surfaces of the tower body corresponding to the top of the water storage tank, second air inlet is arranged on the four surfaces of the tower body corresponding to the top of the first air inlet, air outlet is arranged on the top of the tower body, fan is arranged on the top of the tower body corresponding to the air outlet; Packing layer is arranged in the tower body, the top of the packing layer is arranged below the water inlet, the bottom of the packing layer is arranged on the top of the first air inlet; Spraying mechanism for spraying cooling water to the packing layer is arranged on the tower body; characterized in that Table cooler is arranged on the side wall surface of the tower body corresponding to each second air inlet; Air inlet window is arranged on the tower body corresponding to each first air inlet, when the air inlet window is in the open state, gas enters the tower body through the first air inlet and the second air inlet; When the air inlet window is in the closed state, gas enters the tower body through the second air inlet; The lower part of the packing layer is provided with a notch, the notch is arranged in the shape of a regular quadrangular truncated pyramid, so that the diameter of the packing layer corresponding to the second air inlet decreases from top to bottom.

2. An indirect evaporative cooling tower as claimed in claim 1, wherein, The water outlet is communicated with a first water outlet pipe, the other end of the first water outlet pipe extends out of the tower body; Water collector is arranged in the tower body corresponding to the upper part of the first water outlet pipe; First water inlet pipe is arranged in the tower body, the diameter of the first water inlet pipe is consistent with the diameter of the water inlet, one end of the first water inlet pipe is fixedly arranged on the side wall surface of the tower body away from the water inlet, the other end of the first water inlet pipe extends out of the tower body through the water inlet; A plurality of first spray heads are arranged on the section of the first water inlet pipe located in the tower body.

3. An indirect evaporative cooling tower as claimed in claim 2, wherein, One side of each table cooler corresponds to one spraying mechanism; Each spraying mechanism comprises a second water outlet pipe, a spraying pump and a second water inlet pipe; Each second water outlet pipe is in communication with the water storage tank, the other end of each second water outlet pipe is in communication with the water inlet of the corresponding spraying pump, the water outlet of each spraying pump is in communication with the corresponding second water inlet pipe, the other end of each second water inlet pipe is communicated with a third water outlet pipe, the other end of each third water outlet pipe extends into the tower body and is fixedly arranged on the inner wall surface of the tower body, each third water outlet pipe is arranged below the first water inlet pipe, a plurality of second spray heads are arranged on the section of each third water outlet pipe located in the tower body. The two third water outlet pipes arranged oppositely in the tower body are arranged side by side in the tower body.

4. An indirect evaporative cooling tower as claimed in claim 3, wherein, Each table cooler comprises a cooling medium inlet pipe, a heat exchange pipe and a cooling medium outlet pipe, one end of each cooling medium inlet pipe is in communication with the corresponding heat exchange pipe, the other end of each heat exchange pipe is in communication with the corresponding cooling medium outlet pipe.

5. An indirect evaporative cooling tower as claimed in claim 4, wherein, A first branch pipe and a second branch pipe are communicated with each of the second water inlet pipes, the other end of each first branch pipe is communicated with the corresponding cooling medium inlet pipe, and the other end of each second branch pipe is communicated with the corresponding cooling medium outlet pipe.

6. An indirect evaporative cooling tower as claimed in claim 5, wherein, A first manual valve is arranged on each second water outlet pipe, and a second manual valve is arranged on the section of each second water inlet pipe between the first branch pipe and the second branch pipe.

7. An indirect evaporative cooling tower as claimed in claim 5, wherein, A third manual valve is arranged on each cooling medium inlet pipe and cooling medium outlet pipe, and a fourth manual valve is arranged on each first branch pipe and second branch pipe.

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