Dry and wet dual-purpose cooling tower

Abstract

The utility model provides a wet and dry dual-purpose cooling tower which comprises a shell, a fin coil arranged in the shell, a supercooling heat exchange coil communicated with the fin coil, a spraying device for spraying spraying water to the supercooling heat exchange coil and an exhaust device for introducing air into the shell, and the fin coil is arranged above the supercooling heat exchange coil; the supercooling heat exchange coil pipe comprises a connecting pipe connected with the finned coil pipe, a liquid storage bent pipe connected with the connecting pipe and a supercooling coil pipe communicated with the liquid storage bent pipe, and fins are arranged on the supercooling coil pipe. A refrigerant enters the finned coil, then flows into the supercooling coil, is cooled and then is discharged, so that refrigerant liquid with a better cooling effect is obtained; the spraying device is arranged to cool the supercooling coil pipe and better cool the refrigerant liquid, and the exhaust device is arranged to introduce external air to cool the refrigerant in the fin coil pipe and the supercooling coil pipe; the liquid storage bent pipe is arranged, so that a consistent liquid level is conveniently formed, and meanwhile, gas is prevented from entering the supercooling coil pipe.

Description

Technical Field

[0001] The utility model relates to the field of cooling towers, and is particularly applicable to a dry-wet dual-purpose cooling tower. Background Technique

[0002] In modern society, the application of refrigeration technology has been involved in all sectors of the national economy and people's daily lives. As one of the main heat exchange equipment in industries such as refrigeration and chemical engineering, the cooling tower has a very wide range of applications. In refrigeration and air-conditioning systems, air-cooled condensers, air-cooled coolers, evaporative condensers, and closed cooling towers are more commonly used. Air-cooled condensers / coolers have a very broad market foundation due to their technical characteristics such as compact structure, power saving, and no pollution to the air. However, air-cooled condensers are greatly affected by the ambient temperature. Especially in summer, when the ambient temperature is high, the condensation / cooling efficiency drops sharply, affecting the normal use of the condenser / cooler. For evaporative condensers (evaporative coolers), since water must be used as the evaporation medium to absorb heat, they have relatively high requirements for the sufficiency of water sources. Moreover, due to the use of water, various problems such as fouling on the surface of the coil, freezing of water in winter, and ice hanging blocking the wind and affecting heat transfer occur. Now, a cooling tower that can achieve dry operation in winter and good condensation and cooling effects in summer is developed. Summary of the Invention

[0003] The purpose of the utility model is to solve the above problems and provide a dry-wet dual-purpose cooling tower.

[0004] To achieve the above-mentioned utility model purpose, the utility model provides a dry-wet dual-purpose cooling tower, which includes a shell, a finned coil arranged in the shell, a subcooling heat exchange coil communicated with the finned coil, a spraying device for spraying spray water to the subcooling heat exchange coil, and an exhaust device for introducing wind into the shell. The finned coil is arranged above the subcooling heat exchange coil; the subcooling heat exchange coil includes a connecting pipe connected to the finned coil, a liquid storage elbow connected to the connecting pipe, and a subcooling coil communicated with the liquid storage elbow. Fins are arranged on the subcooling coil.

[0005] Further specifically, the subcooling coil is set to be oval, the fins are arranged along the long axis direction of the oval subcooling coil, and the fins extend along the axial direction of the subcooling coil. The long axis direction of the oval subcooling coil is vertical.

[0006] Further specifically, a plurality of subcooling coils are arranged, and the plurality of subcooling coils are arranged in a staggered manner.

[0007] Further specifically, a plurality of round holes are formed in the fins, and the plurality of round holes are evenly arranged on the fins.

[0008] Further specifically, the diameter of the round holes is 5-20 mm.

[0009] More specifically, the sizes of several of the round holes are the same.

[0010] More specifically, the axial directions of several of the subcooling coils are inclined in the horizontal direction towards the liquid flow direction.

[0011] More specifically, the liquid trap is arranged in a U shape, and the connection end of the liquid trap and the subcooling coil is higher than the connection end of the liquid trap and the connecting pipe, and the lowest end of the liquid trap is lower than the connection end of the liquid trap and the connecting pipe.

[0012] More specifically, a water collector is arranged between the finned coil and the subcooled heat exchange coil.

[0013] More specifically, the exhaust device includes an air inlet arranged at the bottom of the housing, an air outlet arranged at the top of the housing, and a fan arranged at the air outlet, and the air inlet is located below the subcooling coil.

[0014] The utility model mainly designs a dry-wet dual-purpose cooling tower, arranges a finned coil and a subcooling coil. After the refrigerant enters the finned coil, it then flows into the subcooling coil and is discharged after being cooled to obtain a refrigerant liquid with better cooling effect; a spraying device is arranged to spray spray water on the subcooling coil to cool the subcooling coil and better cool the refrigerant liquid, an exhaust device is arranged to introduce external air to cool the refrigerant in the finned coil and the subcooling coil; a connecting pipe is arranged to facilitate the collection and redistribution of the refrigerant, and a liquid trap is arranged to facilitate the formation of a consistent liquid level and prevent gas from entering the subcooling coil at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The following will refer to the accompanying drawings to describe the exemplary embodiments of the present application in detail. It should be understood that the embodiments described below are only used to explain the present application and do not limit the scope of the present application. In the accompanying drawings:

[0016] Figure 1 is the front view structural schematic diagram of the utility model Figure 1 ;

[0017] Figure 2 is the front view structural schematic diagram of the utility model Figure 2 ;

[0018] Figure 3 is the side view structural schematic diagram of the utility model Figure 1 ;

[0019] Figure 4 is the side view structural schematic diagram of the utility model Figure 2 ;

[0020] Figure 5 is the front view structural schematic diagram of the subcooled heat exchange coil of the utility model;

[0021] Figure 6 is the Figure 5 A - A cross - sectional view of the present utility model;

[0022] Figure 7 is the front - view structural schematic diagram of the elliptical finned coil of the present utility model;

[0023] In the figure: 1, housing; 2, finned coil; 3, sub - cooled heat - exchange coil; 31, connecting pipe; 32, liquid - retaining elbow; 33, sub - cooled coil; 34, fin; 35, round hole; 41, air inlet; 42, air outlet; 43, fan; 51, water storage tank; 52, circulation pump; 53, spray pipe; 54, spray head; 6, water eliminator; →: the conveying direction of the wind. Specific embodiments

[0024] To make the purpose, technical solutions and advantages of the implementation of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be described in more detail below with reference to the accompanying drawings in the embodiments of the present utility model. In the drawings, the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions throughout. The described embodiments are some, but not all, of the embodiments of the present utility model. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present utility model and should not be construed as limiting the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the protection scope of the present utility model.

[0025] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present utility model. The embodiments of the present utility model will be described in detail below with reference to the drawings.

[0026] It should be understood that the drawings are only used for exemplary illustration of the present application.

[0027] A dry - wet dual - use cooling tower, as Figures 1-7 shown, includes a housing 1, a finned coil 2 disposed in the housing 1, a sub - cooled heat - exchange coil 3 communicated with the finned coil 2, a spraying device for spraying spray water to the sub - cooled heat - exchange coil 3, and an exhaust device for introducing wind into the housing 1.

[0028] As Figures 1-4As shown in the figure, the exhaust device includes an air inlet 41 provided at the bottom of the housing 1, an air outlet 42 provided at the top of the housing 1, and a fan 43 provided at the air outlet 42. The air inlet 41 is located below the subcooling heat exchange coil 3 to ensure that the external air will surely pass through the subcooling heat exchange coil 3. Under the action of the fan 43, air is sucked into the housing 1 from the air inlet 41, and the air passes through the subcooling heat exchange coil 3 and the finned coil 2 in sequence and then flows out from the air outlet 42. To prevent large particles or other substances from entering the housing 1, an air inlet grille is provided on the air inlet 41.

[0029] As Figures 1-4 As shown in the figure, the spraying device includes a water storage tank 51 provided at the bottom of the housing 1, a circulation pump 52 that sucks water from the water storage tank 51, a spraying pipeline 53 communicated with the circulation pump 52, and a spray head 54 communicated with the spraying pipeline 53. The circulation pump 52 transports the water in the water storage tank 51 to the spraying pipeline 53 and sprays it onto the subcooling heat exchange coil 3 through the spray head 54 provided on the spraying pipeline 53. A number of spray heads 54 are provided and are evenly distributed on the spraying pipeline 53 above the subcooling heat exchange coil 3. The sprayed water on the subcooling heat exchange coil 3 will drip back into the water storage tank 51 again to complete the recovery and recycling. The spray head 54 is provided above the subcooling heat exchange coil 3 and below the finned coil 2 to ensure that water can be sprayed on the subcooling heat exchange coil 3 but cannot contact the finned coil 2. To better prevent water from contacting the finned coil 2, a water collector 6 is provided between the finned coil 2 and the subcooling heat exchange coil 3.

[0030] The finned coil 2 is provided above the subcooling heat exchange coil 3. The high-temperature and high-pressure refrigerant gas enters from the right-side heat working medium inlet of the finned coil 2 and exchanges heat fully with the external air close to the wet-bulb temperature to form a saturated refrigerant liquid, and then flows out from the heat working medium outlet of the finned coil 2 and enters the subcooling heat exchange coil 3. It exchanges heat fully with the external air in the subcooling heat exchange coil 3 or is subcooled by cooling water, and then forms a subcooled refrigerant liquid and flows out of the cooling tower.

[0031] The main heat exchange of the refrigerant is carried out in the finned coil 2. The purpose of selecting the finned coil 2 as the main heat exchange component is to enable it to stop the operation of the water pump when the ambient temperature is lower than 20°C and use the low-temperature air in the environment to condense the refrigerant; when the ambient temperature is relatively low, only the air needs to exchange heat with the finned coil 2 to achieve the condensation of the refrigerant, which can save water consumption and the electric energy consumption of the water pump.

[0032] As Figure 2As shown, the finned coil 2 can be arranged in any way, such as a V-shaped arrangement, or there can be other arrangements, such as flat horizontal, inverted V, etc. In this solution, the finned coil 2 is arranged in a V-shape. Since the heat exchange of the refrigerant mainly occurs inside the finned coil 2, it is necessary for the finned coil 2 to have good heat exchange with the air. However, if there are gaps between the finned coils 2 arranged, the air will flow out through the gaps and cannot fully exchange heat with the refrigerant inside the finned coil 2. Therefore, when the finned coil 2 is arranged in a V-shape, the finned coils 2 on both sides are completely connected to form a closed structure, ensuring that when the air flows out towards the air outlet 42, it must pass through the finned coil 2. The finned coil 2 is a nested tube with a triangular arrangement, and the spacing can be from 1.5 mm to 7 mm. The finned coil 2 and the subcooling heat exchange coil 3 are in close contact in a form of expansion joint, or a wound fin tube or a rolled fin tube can also be used.

[0033] As Figures 5-7 As shown, the saturated refrigerant liquid flows into the subcooling heat exchange coil 3 for further cooling. The subcooling heat exchange coil 3 includes a connecting pipe 31 connected to the finned coil 2, a liquid storage elbow 32 connected to the connecting pipe 31, and a subcooling coil 33 communicated with the liquid storage elbow 32. The axis of the subcooling coil 33 is inclined horizontally according to the liquid flow direction, which is convenient for better subcooling heat exchange and better discharging the refrigerant liquid in the pipe at the same time. The subcooling coil 33 is set to be oval or circular. Fins 34 are provided on the subcooling coil 33, and the fins 34 are integrally provided with the subcooling coil 33. When the subcooling coil 33 is set to be oval, the fins 34 are arranged in the long axis direction of the oval subcooling coil 33, and the fins 34 extend along the axis of the subcooling coil 33. The long axis direction of the oval subcooling coil 33 is vertical. The tube type of the subcooling coil 33 can also be a round tube, but the heat transfer efficiency will be slightly lower. The subcooling coil 33 is designed to allow the heat working medium to be further subcooled. Therefore, in this solution, the subcooling coil 33 is set to be an oval finned coil.

[0034] As Figures 5-7 As shown, a plurality of the subcooling coils 33 are provided, and the plurality of subcooling coils 33 are arranged in a staggered manner. Further, the subcooling coils 33 are arranged in a closely attached manner with upper and lower dislocation. The subcooling coils 33 can only be arranged in one layer. The upper and lower dislocation arrangement forms two layers, but in this solution, this is defined as one layer. The main reason for arranging in one layer is that being too thick will increase the resistance of the air, resulting in a reduction in the actual ventilation efficiency of the fan 43, an increase in the fan 43 selection, and non-energy-saving.

[0035] In spring, summer, and autumn, when the temperature is relatively low, only the air-cooling mode is generally used to cool the refrigerant. However, in the hot summer, the spraying and air-cooling collaborative mode is adopted. There is sufficient evaporation heat absorption of water on the surface of the subcooling coil 33, and the temperature of the sprayed water is close to the wet-bulb temperature of the local area. Therefore, the saturated refrigerant liquid in the subcooling coil 33 can be further cooled into a subcooled refrigerant liquid. The use of an elliptical finned coil is to increase the heat transfer area, enabling the sprayed water to better form a uniform water film on its surface. There are two effects. First, it expands the heat transfer area of the elliptical finned coil, enabling the saturated refrigerant liquid in the elliptical finned coil to better exchange heat and be subcooled, reducing from a saturated temperature of 35°C to a subcooled liquid of about 25°C. Second, the water film area on the surface of the elliptical finned coil is larger, enabling better contact between the water on its surface and the wind, enhancing the evaporation heat absorption of the water film.

[0036] As Figures 5-7 shown, in order to allow cross-flow air to appear between the elliptical finned coils, a number of round holes 35 are opened on the fin 34. The number of round holes 35 is evenly arranged on the fin 34. The diameter of the round holes 35 is set to 5 - 20 mm. The number of the round holes 35 is the same size. Of course, the round holes 35 can also be set to different sizes, but it may cause uneven air flow. Therefore, in this solution, the number of round holes 35 is the same size. Since the wind enters the device from the four surrounding sides at the bottom of the housing 1, the air volume near the elliptical finned coils around the housing 1 is larger. By opening the round holes 35, the wind can better flow between each elliptical finned coil, making the air distribution more uniform. At the same time, the opened round holes 35 can also make the wind better turbulent, breaking the water film on the outer surface of the elliptical finned coil and enhancing the heat transfer between the wind, water, and the surface of the fin 34.

[0037] As Figure 5 shown, the liquid trap 32 is set to a U shape, and the connection end of the liquid trap 32 and the subcooling coil 33 is higher than the connection end of the liquid trap 32 and the connecting pipe 31. Specifically, the liquid trap 32 includes two parts. The part connected to the connecting pipe is the first part, set to a U shape. The part connected to the subcooling coil is the second part, set to an arc shape, and the arc-shaped part is set to arch upward. The U-shaped liquid trap and the arc-shaped liquid trap are connected together to form the liquid trap 32.

[0038] The high-pressure refrigerant saturated refrigerant liquid flows out from the finned coil 2 arranged in a V shape, flows into the connecting pipe 31 of the subcooling heat exchange coil 3 to gather and redistribute the liquid, and then enters the liquid trap 32. The main functions of the liquid trap are twofold: First, the liquid seal of the liquid trap 32 prevents gas from entering the subcooling coil 33, allowing the main heat exchange to occur in the finned coil 2. Since heat exchange is accompanied by a large amount of heat dissipation, and the finned coil 2 is a pure heat exchange with clean air without water participation, scale will not form on the surface of the finned coil 2. In the section of the subcooling coil 33, only the saturated refrigerant liquid exchanges heat with the sprayed water outside the tube wall through the heat exchange tube wall, which is a sensible heat exchange with a small amount of heat exchange and a low heat exchange temperature. Therefore, scale formation due to a large amount of water evaporation will not occur on the outer surface of the subcooling coil 33, which can better prevent the heat exchange efficiency from decreasing due to scale formation on the surface of the subcooling coil 33. Second, forming the liquid trap 32 can better make a consistent liquid storage liquid level form in the connecting pipe 31, enabling the refrigerant saturated liquid to flow into the subcooling coil 33 more evenly and the liquid distribution to be more uniform.

[0039] Taking the refrigerant as an example, the working principle of a dry-wet dual-purpose cooling tower will be elaborated in detail:

[0040] Summer operation:

[0041] In summer, due to the relatively high ambient temperature, the cooling tower adopts a mode of coordinated spraying and air cooling.

[0042] The fan 43 is turned on, and the air enters the cooling tower from the air inlets 41 on both sides of the bottom of the housing 1, passes through the subcooling heat exchange coil 3 and the finned coil 2 in sequence, and finally is discharged from the cooling tower through the air outlet 42.

[0043] The sprayed water is sucked from the water storage tank 51 by the circulating pump 52 into the spraying pipeline 53, and then sprayed out through the nozzles 54, evenly sprayed onto the subcooling heat exchange coil 3, and finally re-gathered in the water storage tank 51. The function of the water collector 6 is to collect the water droplets flying away with the high-speed air and prevent them from flowing towards the finned coil 2.

[0044] The high-temperature and high-pressure refrigerant enters from the right-side inlet of the finned coil 2, condenses from the high-temperature and high-pressure refrigerant gas into the saturated liquid in the saturated stage in the finned coil 2, flows out from the left-side outlet of the finned coil 2 into the subcooling heat exchange coil 3, and is further subcooled by the water close to the wet-bulb temperature in the subcooling heat exchange coil 3 and becomes the subcooled refrigerant liquid and flows out of the cooling tower.

[0045] The functions of the sprayed water are mainly as follows:

[0046] 1. By the principle of heat absorption through evaporation, the high-temperature air entering from the air inlet 41 is cooled. Taking Guangzhou as an example, the dry-bulb temperature in summer is 34.1°C and the wet-bulb temperature is 26.2°C. Thus, it can be considered that the incoming air temperature in summer is 34.1°C. After passing through the water spray area, the air temperature drops to close to the wet-bulb temperature of 26.2°C, which can greatly increase the heat transfer temperature difference. In the hottest month, the condensation temperature of this cooling tower can still be controlled to 37 - 38°C, meeting the condensation temperature standard of the shell-and-tube water-cooled condenser.

[0047] 2. Due to the evaporation of the sprayed water, its temperature is generally 1 - 2 degrees higher than the wet-bulb temperature. Such water at 27 - 28°C can still further absorb heat from the subcooling heat exchange coil 3, causing the refrigerant to be further cooled into a subcooled refrigerant liquid.

[0048] 3. The water curtain generated by the sprayed water can clean the air entering the cooling tower and remove dust.

[0049] Operation in spring, autumn and winter:

[0050] The ambient temperature is relatively low in spring, autumn and winter. When the ambient temperature is lower than 20°C, the circulation pump 52 can be turned off and only the air-cooling mode is adopted. The fan 43 is turned on, and the air enters the cooling tower from the air inlets 41 on both sides at the bottom of the housing 1, passes through the subcooling heat exchange coil 3 and the finned coil 2 in sequence, and finally is discharged from the air outlet 42. The high-temperature and high-pressure refrigerant enters from the right-side inlet of the finned coil 2, is condensed from the high-temperature and high-pressure refrigerant gas into a saturated liquid in the saturated stage in the finned coil 2, flows into the subcooling heat exchange coil 3 from the left-side outlet of the finned coil 2, and is further subcooled by absorbing heat in the subcooling heat exchange coil 3 and then flows out of the cooling tower as a subcooled refrigerant liquid.

[0051] Since the incoming air temperature is lower than 20°C and the main heat exchange component of the cooling tower in this solution is the finned coil 2, the condensation temperature can be fully controlled to not higher than 35°C, achieving the use effect of the evaporative condenser. Some existing cooling towers on the market have smooth tube groups as their main heat exchange equipment, and their heat exchange area is only the surface area of the heat exchange tubes, with limited heat exchange area. They can only operate dry in winter and can only operate dry when the ambient temperature is below 0°C. However, in principle, this solution can operate normally without water when the ambient temperature is lower than 20°C. Closing the water circulation can prevent various problems caused by water freezing, such as ice blocking the air inlet 41, ice freezing in the water storage tank 51, ice freezing in the circulation pump 52, ice freezing in the spray pipeline 53, etc. At the same time, it can make full use of the natural cold source at low ambient temperature to cool the refrigerant, reduce the consumption of water resources, stop using the water pump, and reduce power consumption.

[0052] The cooling tower shell adopting this solution can achieve the following effects:

[0053] 1. It can achieve dry operation of the cooling tower in spring, autumn, and winter, make full use of natural cold air resources, respond to the call for low carbon, save energy and reduce emissions, reduce the water consumption of the cooling tower, and at the same time avoid a series of problems caused by water icing at low temperatures in winter.

[0054] 2. Since the subcooled heat exchange coil 3 is in contact with water during the subcooling stage and its temperature is generally lower than 35°C, it is not easy to scale on the surface of its heat exchange tubes. Even if scaling occurs later, since there is only a row of tubes arranged in a staggered manner and it is modularly designed and can be disassembled, it can be very conveniently disassembled and cleaned.

[0055] 3. In summer, when the ambient temperature reaches 34 - 35°C, its use effect is equivalent to that of a shell-and-tube water-cooled condenser. When the ambient temperature is lower than 22°C, its use effect can even be better than that of an evaporative condenser.

[0056] 4. It adopts a frame-type and modular design, and the shell 1 and each component can be conveniently disassembled, and the entire cooling tower can be conveniently cleaned.

[0057] 5. The cooling tower involved in this solution has strong adaptability and can be used in both the north and south, and the east and west of the country.

[0058] 6. The cooling tower involved in this solution can achieve waterless operation in winter.

[0059] 7. The cooling tower involved in this solution expands the application scenarios of air-cooled condensers / coolers and solves the problem that the cooling effect of air-cooled condensers / coolers is poor due to hot summers in our country.

[0060] The preferred embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0061] In addition, it should be noted that, in the case of no contradiction, the various specific technical features described in the above specific embodiments can be combined in any appropriate way. To avoid unnecessary repetition, the present invention will not separately describe various possible combination methods.

[0062] In addition, any combination can be made between various different embodiments of the present invention as long as it does not violate the idea of the present invention, and it should also be regarded as the content disclosed by the present invention.

Claims

1. A wet-dry dual-purpose cooling tower, characterized in that: It includes a housing (1), a finned coil (2) arranged inside the housing (1), a subcooling heat exchange coil (3) communicated with the finned coil (2), a spraying device for spraying spray water onto the subcooling heat exchange coil (3), and an exhaust device for introducing air into the housing (1). The finned coil (2) is arranged above the subcooling heat exchange coil (3). The subcooling heat exchange coil (3) includes a connecting pipe (31) connected to the finned coil (2), a liquid storage elbow (32) connected to the connecting pipe (31), and a subcooling coil (33) communicated with the liquid storage elbow (32). Fins (34) are arranged on the subcooling coil (33).

2. The dry-wet dual-purpose cooling tower according to claim 1, wherein: The subcooling coil (33) is arranged in an oval shape. The fins (34) are arranged in the major axis direction of the oval subcooling coil (33), and the fins (34) are arranged along the axial direction of the subcooling coil (33). The major axis direction of the oval subcooling coil (33) is vertical.

3. The wet-dry type cooling tower according to claim 2, wherein: A plurality of the subcooling coils (33) are arranged, and the plurality of subcooling coils (33) are arranged in a staggered manner.

4. The dry-wet dual-use cooling tower according to claim 1, characterized in that: A plurality of round holes (35) are formed in the fins (34), and the plurality of round holes (35) are evenly arranged on the fins (34).

5. The wet-dry type cooling tower according to claim 4, characterized in that: The diameter of the round holes (35) is 5 - 20 mm.

6. The wet-dry dual-purpose cooling tower according to claim 5, wherein: The plurality of round holes (35) are of the same size.

7. The wet and dry dual-purpose cooling tower according to claim 1, wherein: The axial directions of the plurality of subcooling coils (33) are inclined horizontally towards the liquid flow direction.

8. The dry-wet dual-purpose cooling tower according to claim 1, wherein: The liquid storage elbow (32) is arranged in a U shape, and the connection end of the liquid storage elbow (32) with the subcooling coil (33) is higher than the connection end of the liquid storage elbow (32) with the connecting pipe (31). The lowest point of the liquid storage elbow (32) is lower than the connection end of the liquid storage elbow (32) with the connecting pipe (31).

9. The wet-dry dual-purpose cooling tower according to claim 1, characterized in that: A water collector (6) is arranged between the finned coil (2) and the subcooling heat exchange coil (3).

10. The dry-wet dual-purpose cooling tower according to claim 1, wherein: The exhaust device includes an air inlet (41) arranged at the bottom of the housing (1), an air outlet (42) arranged at the top of the housing (1), and a fan (43) arranged at the air outlet (42). The air inlet (41) is located below the subcooling heat exchange coil (3).

Images