Mixed-flow peak composite wet air cooler and operation mode control method thereof

Abstract

According to the mixed-flow peak composite wet-type air cooler and the operation mode control method thereof, when the environment temperature is high and the cooling capacity needs to be enhanced, an anti-freezing shutter and a peak shutter are controlled to be opened, an induced draft fan, a peak spraying device and an evaporation coil spraying device are started, and therefore the cooling capacity of the mixed-flow peak composite wet-type air cooler is improved. The fresh air enters through the anti-freezing shutter and the peak shutter and exchanges heat with the evaporation coil and the peak device, spraying water circulates between the hot water pool and the cold water pool, and the peak operation mode is achieved. On one hand, the peak device cools circulating water, so that the initial spraying temperature of the cooled water is remarkably reduced when the cooled water is sprayed to the surface of the evaporation coil, the temperature difference between the spraying water and the evaporation coil is increased, and the surface heat exchange efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the technical field of heat exchange equipment, specifically relating to a mixed-flow peak composite wet air cooler and its operation mode control method. Background Technology

[0002] Wet air coolers are core heat exchange equipment used in industries such as power, chemical, and petroleum refining for cooling circulating water and various process media. Their core working principle is that water is sprayed onto the surface of the evaporator coils through a spray system, allowing the water to directly contact the forced-inlet air. Utilizing the physical property of water evaporation and heat absorption, the heat in the process media is quickly removed, ultimately achieving efficient cooling and ensuring the smooth progress of subsequent production processes. This equipment is widely used in industrial production due to its balance between cooling efficiency and equipment cost. However, under complex and variable actual operating conditions, it still faces many significant challenges. Especially in high-temperature environments or when the load reaches peak levels, the shortcomings of traditional wet air coolers in heat exchange efficiency become more pronounced.

[0003] As ambient temperature rises, the air's heat-carrying capacity decreases significantly. Meanwhile, industrial production often involves increased loads, further increasing the cooling demand for process media. Simultaneously, airflow velocity under high-temperature conditions is easily affected by ambient air pressure, leading to uneven airflow distribution within equipment and "gas-liquid short-circuiting" in some areas, further weakening the heat exchange effect.

[0004] This significant inadequacy in heat exchange efficiency directly results in the equipment's inability to meet peak cooling demands. The outlet temperature of the process medium exceeds the design threshold, and in some production scenarios, the medium temperature even exceeds the standard after cooling. This substantial decline in cooling efficiency not only affects the operational stability of subsequent equipment such as reactors and heat exchangers but may also trigger the system's safety protection mechanisms, leading to forced reductions in production load and intermittent production line shutdowns. More seriously, the prolonged flow of high-temperature media within pipelines accelerates pipeline corrosion and aging, increasing the risk of equipment leaks. This not only affects production continuity but may also trigger safety accidents and economic losses, posing multiple hidden dangers to the company's stable production. Summary of the Invention

[0005] This invention provides a mixed-flow peak-load composite wet air cooler and its operation mode control method to solve the problems mentioned in the background art, such as insufficient heat exchange efficiency and uneven airflow distribution leading to limited cooling capacity of wet air coolers in high-temperature environments or during peak loads.

[0006] The technical solution adopted in this invention is as follows: a mixed-flow peak-type composite wet air cooler, comprising a housing, with a partition installed inside the housing, dividing the internal space of the housing into two interconnected cavities, an evaporator coil installed in the upper cavity at the connection between the two cavities, so that when the airflow from the lower cavity enters the upper cavity, it can contact the evaporator coil; a first air inlet is provided on the side wall of the upper cavity, and a peak device is installed in the upper cavity near the first air inlet, forming a third chamber between the peak device and the evaporator coil, and a fourth chamber is formed inside the housing above the evaporator coil, the fourth chamber being interconnected with the third chamber; a cold water pool and a hot water pool are provided below the housing, and a peak spray device is provided between the hot water pool and the peak device, so that the water in the hot water pool is transported upward to the peak device through the peak spray device, and the cold water after heat exchange by the peak device can flow into the cold water pool.

[0007] An exhaust fan is installed on the top of the enclosure.

[0008] A water collector is installed inside the housing and above the evaporator coil. Below the water collector is an evaporator coil spraying device, which is used to transport water from the cold water pool to the evaporator coil and spray it onto the surface of the evaporator coil.

[0009] The first air inlet is located on the side wall of the housing and is equipped with a pointed louver; it also includes a second air inlet located on the side wall of the lower cavity, and the second air inlet is equipped with an antifreeze louver.

[0010] There are two sets of the second air inlet, located on both sides of the lower cavity.

[0011] The lower cavity near the second air inlet forms a first chamber, and the area of ​​the lower cavity below the evaporator coil forms a second chamber. The first chamber and the second chamber are interconnected.

[0012] The enclosure contains two sets of spike devices, which are located on both sides of the enclosure. There are also two sets of first air inlets, which are located on the side wall of the enclosure near the spike devices.

[0013] A guide pipe is connected below the spike device, and the guide pipe is connected to the cold water pool.

[0014] The hot water tank and the cold water tank are connected, and the water in the hot water tank can overflow into the cold water tank when the liquid level reaches a predetermined height.

[0015] It also includes a precooling device, which is installed inside the housing and above the evaporator coil. The precooling device is connected to the evaporator coil and is configured to allow the working medium to be precooled before entering the evaporator coil for further cooling.

[0016] This application also provides a method for controlling the operating mode of a mixed-flow, peak-split, composite wet air-cooled unit, which is applied to the aforementioned mixed-flow, peak-split, composite wet air-cooled unit. The operating mode control is based on ambient temperature and operating requirements, switching the operating state of the air-cooled unit. The air-cooled unit includes at least anti-freeze louvers, peak-split louvers, peak-split devices, peak-split spray devices, evaporator coils, evaporator coil spray devices, a hot water tank, a cold water tank, a pre-cooling device, and an induced draft fan. The control method includes:

[0017] When the ambient temperature is high and enhanced cooling capacity is required, control the opening of the antifreeze louvers and peak louvers, start the induced draft fan, peak spray device and evaporator coil spray device, so that fresh air enters through the antifreeze louvers and peak louvers respectively, and exchanges heat with the evaporator coil and peak device respectively. The spray water circulates between the hot water tank and the cold water tank to realize the peak operation mode.

[0018] When the ambient temperature decreases and the heat exchange capacity of the precooling device increases, the antifreeze louvers and peak louvers are opened, the induced draft fan and evaporator coil spray device are started, and the peak device and peak spray device are stopped, so that part of the fresh air can exchange heat with the evaporator coil, and another part of the fresh air forms a supplementary fresh air channel through the peak device and enters the precooling device to achieve the joint operation mode.

[0019] When the ambient temperature drops further, control the opening of the anti-freeze louvers and the peak louvers, start the induced draft fan, stop the peak device, the peak spray device and the evaporator coil spray device, and drain the spray water in the hot water tank and the cold water tank, so that the evaporator coil can participate in heat exchange in a dry heat exchange mode, and realize the water stop operation mode.

[0020] When the ambient temperature drops further and there is no need to cool the medium, the antifreeze louvers and peak louvers are closed, and the induced draft fan, peak spray device and evaporator coil spray device are stopped, so that the air cooler is in a closed and insulated state, and the antifreeze operation mode is achieved.

[0021] The beneficial effects of this invention are as follows:

[0022] 1. High Temperature and High Load Adaptability: This invention achieves a dual temperature control synergy for both spray water and operating medium by combining a peak-shaving device and a pre-cooling device. On one hand, the peak-shaving device cools the circulating water, significantly reducing its initial spray temperature when sprayed onto the evaporator coil surface, thereby increasing the temperature difference between the spray water and the evaporator coil and improving surface heat exchange efficiency. On the other hand, the pre-cooling device pre-cools the operating medium entering the evaporator coil, preventing high-temperature medium from directly entering the coil and causing excessive heat exchange load. The two cooling methods work together to significantly improve the heat exchange capacity under high temperature environments and peak loads, ensuring stable and compliant process medium outlet temperature and avoiding production interruptions or safety risks due to insufficient cooling.

[0023] 2. Airflow optimization and short-circuit prevention: This invention sets a first air inlet and a second air inlet at the upper and lower positions of the side wall of the box, respectively, so that the fresh air entering the box forms a dual airflow structure with vertical and horizontal flow. After entering, the air flows at different heights and participates in the heat exchange process. Structurally, it avoids the situation of airflow short-circuiting inside the box, making the airflow distribution inside the box more uniform, effectively reducing the generation of local insufficient heat exchange or heat exchange dead zones, thereby improving the overall heat exchange efficiency.

[0024] 3. Flexible switching between multiple operating conditions: The present invention is equipped with openable and closable louver structures at both the first and second air inlets. The corresponding air inlets can be selectively opened or closed according to the actual ambient temperature and operating conditions, thereby forming different operating modes. By adjusting the opening state of the louvers, the air intake path and air volume can be dynamically controlled, so that the equipment can meet the cooling requirements under different environmental conditions while avoiding unnecessary air volume and energy consumption. This balances cooling efficiency and energy consumption control, reducing the overall annual operating energy consumption and operating costs.

[0025] 4. Enhanced equipment safety: This invention can realize water outage mode and antifreeze mode according to actual environmental needs. In low temperature environment or non-operational conditions, it can effectively prevent the medium from freezing in the pipeline or heat exchange components, reduce the risk of equipment damage, and extend the service life of the equipment. At the same time, by setting up cold water pool and hot water pool, water of different temperature levels can participate in the corresponding heat exchange process, avoiding heat backflow or ineffective heat exchange, and ensuring the rationality and stability of the heat exchange process.

[0026] 5. This invention can automatically divert water to the cold water tank through overflow when there is too much water in the hot water tank, which simplifies the layout and maintenance of water circuits and reduces the difficulty of troubleshooting. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0028] Figure 2This is a schematic diagram of the structure of Embodiment 2 of the present invention.

[0029] in:

[0030] 1. Housing; 101. First chamber; 102. Second chamber; 103. Third chamber; 104. Fourth chamber; 2. Water collector; 3. Peak spray device; 4. Evaporator coil; 5. First air inlet; 6. Peak louver; 7. Anti-freeze louver; 8. Second air inlet; 9. Peak spray device; 10. Hot water tank; 11. Cold water tank; 12. Evaporator coil spray device; 13. Guide pipe; 14. Partition; 15. Exhaust fan; 16. Precooling device. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Example 1

[0033] like Figure 1 As shown, a mixed-flow peak composite wet air cooler includes a housing 1. Inside the housing 1, a partition 14 is installed. The partition 14 is horizontally arranged and has a hollow design in the middle. The partition 14 divides the internal space of the housing 1 into two interconnected cavities, an upper and a lower cavity. An evaporator coil 4 is installed in the upper cavity at the position where the two cavities connect, so that when the airflow in the lower cavity enters the upper cavity, it can contact the evaporator coil 4. Flanges are installed at both ends of the evaporator coil 4 for connecting to external pipelines to realize the introduction and export of the working medium.

[0034] A first air inlet 5 is provided on the side wall of the upper cavity. A peaking device 3 is installed in the upper cavity near the first air inlet 5. This allows air to enter the box 1 from the first air inlet 5 and directly contact the peaking device 3 to cool the flowing water on the peaking device 3. A third chamber 103 is formed between the peaking device 3 and the evaporator coil 4. A fourth chamber 104 is formed inside the box 1 and above the evaporator coil 4. The fourth chamber 104 is connected to the third chamber 103 and can be used to exhaust the hot and humid air after heat exchange by the peaking device 3 to the outside after passing through the third chamber 103 and the fourth chamber 104.

[0035] Below the housing 1, there are a cold water pool 11 and a hot water pool 10. A peak spray device 9 is provided between the hot water pool 10 and the peak device 3. The peak spray device 9 is used to transport the water in the hot water pool 10 upward to the peak device 3. The cold water after being heated by the peak device 3 can flow into the cold water pool 11. Inside the housing 1 and above the evaporator coil 4, there is a water collector 2. Below the water collector 2, there is an evaporator coil spray device 12. The evaporator coil spray device 12 is used to transport the water in the cold water pool 11 to the top of the evaporator coil 4 and spray it onto the surface of the evaporator coil 4. The peak spray device 9 mainly includes a water pump, water pipes, and nozzles. The water pump provides power to guide water from the hot water tank 10 into the water pipes, and finally sprays it out from the nozzles. The water flows downward through the peak device 3 and exchanges heat with the horizontally flowing air, thereby reducing the water temperature. After the water temperature is reduced, it flows into the cold water tank 11. Then, the cold water is lifted by the evaporator coil spray device 12 and sprayed onto the evaporator coil 4. The cooled cold water has a better cooling effect when it undergoes evaporative heat exchange. The structure of the evaporator coil spray device 12 is similar to that of the peak spray device 9, except that the water is sprayed onto different objects. The structure and principle of both are conventional designs in the prior art, and will not be described in detail here.

[0036] The top of the housing 1 is equipped with an exhaust fan 15, which draws fresh air from outside into the housing 1 for heat exchange before it is exhausted from the top of the housing 1.

[0037] The first air inlet 5 is located on the side wall of the housing 1, which is equipped with a pointed louver 6. It also includes a second air inlet 8 located on the side wall of the lower cavity. The second air inlet 8 is equipped with an antifreeze louver 7. Both the pointed louver 6 and the antifreeze louver 7 can be opened and closed manually or electrically. The second air inlet 8 is set at the lower side wall of the housing 1 so that the fresh air can enter the housing 1 in two ways, forming a dual airflow inside the housing 1. This prevents short circuits or heat exchange dead zones in the airflow inside the housing 1, which helps to improve the overall heat exchange efficiency.

[0038] There are two sets of second air inlets 8, located on both sides of the lower cavity of the housing 1. The number of air inlets in each set can be single or multiple depending on the size of the housing 1. Similarly, there are two sets of spike devices 3 inside the housing 1, and the number of spike devices 3 in each set can also be different depending on the size of the housing 1. The two sets of spike devices 3 are located on both sides inside the housing 1. There are two sets of first air inlets 5, respectively located on the side wall of the housing 1 near the location of the spike devices 3. This arrangement is to increase the air intake volume of the air cooler per unit time, thereby improving the heat exchange efficiency. It is understood that in other embodiments, first air inlets 5 and second air inlets 8 can be opened on the top and bottom of the housing 1 on all four sides, which can further increase the air intake volume per unit time.

[0039] The lower cavity near the second air inlet 8 forms a first chamber 101, and the area of ​​the lower cavity below the evaporator coil 4 forms a second chamber 102. The first chamber 101 and the second chamber 102 are interconnected.

[0040] The peaking device 3 is connected to a guide pipe 13 below it. The guide pipe 13 is connected to the cold water pool 11. It is used to allow the water cooled by the peaking device 3 to enter the guide pipe 13 and then flow into the cold water pool 11, so as to avoid splashing and disorderly flow caused by the water falling freely.

[0041] The hot water tank 10 is connected to the cold water tank 11, and the water in the hot water tank 10 can overflow into the cold water tank 11 when the liquid level reaches a predetermined height. Specifically, in this example, the hot water tank 10 is located inside the cold water tank 11 at the upper position. When the water volume in the hot water tank 10 exceeds the threshold, the water can flow directly into the cold water tank 11. Alternatively, in other embodiments, an overflow pipe is installed on the side wall of the hot water tank 10, and the overflow pipe leads to the cold water tank 11, which can also achieve the effect of diverting excess water from the hot water tank 10 into the cold water tank 11.

[0042] Example 2

[0043] like Figure 2 As shown, this embodiment, based on the first embodiment described above, further includes a pre-cooling device 16. The pre-cooling device 16 is located inside the housing 1 and above the evaporator coil 4, specifically within the fourth chamber 104. The pre-cooling device 16 is interconnected with the evaporator coil 4 and is configured to allow the working medium to first enter the pre-cooling device 16 for pre-cooling before entering the evaporator coil 4 for further cooling. The main structure of the pre-cooling device 16 is similar to that of the evaporator coil 4, but the pre-cooling device 16 consists of several finned tubes, while the evaporator coil 4 consists of several smooth tubes. The pre-cooling device 16 and the evaporator coil 4 are connected in series via pipes. The working medium first flows through the pre-cooling device 16 and then into the evaporator coil 4. Since the pre-cooling device 16 is located in the second chamber 102 above the evaporator coil 4, air can contact and exchange heat with the pre-cooling device 16 before being guided to the outside by the induced draft fan 15, primarily serving to pre-cool the working medium. The precooling device 16 can be arranged horizontally, vertically, in a V-shape or M-shape, or at an angle to the horizontal plane, and is installed in the fourth chamber 104.

[0044] Regarding principles and operating modes:

[0045] Now combined Figure 2The peak operation mode of this invention is described as follows: In peak mode, the antifreeze louvers 7 and peak louvers 6 are open. Under the action of the induced draft fan 15, the fresh air is divided into two paths. One path enters the first chamber 101, the second chamber 102, and the evaporator coil 4 sequentially through the antifreeze louvers 7, where it undergoes heat exchange with the evaporator coil 4. The humid air after heat exchange then enters the pre-cooling device 16 through the fourth chamber 104 for further heat exchange. The other path of fresh air enters the peak device 3 through the peak louvers 6 and undergoes heat exchange with the spray water. The humid air after heat exchange then enters the pre-cooling device 16 through the third chamber 103 and the fourth chamber 104 for further heat exchange, and is finally discharged into the atmosphere by the induced draft fan 15. The spray water undergoes heat exchange with the evaporator coil 4, its temperature rises, and it falls into the hot water tank 10 under the action of gravity. The peak spray device 9 transports hot water from the hot water tank 10 to the peak device 3. After being cooled by the peak device 3, the spray water is transported to the cold water tank 11 through the guide pipe 13 of the peak device 3. The evaporator coil spray device 12 transports cold water from the cold water tank 11 to the evaporator coil 4 for indirect heat exchange, and so on.

[0046] Now combined Figure 2 The combined operation mode of the present invention is explained as follows: In the combined operation mode, as the ambient temperature decreases, the heat exchange capacity of the precooling device 16 is enhanced. At this time, the peak device 3 and the peak spray device 9 are shut down, and the antifreeze louvers 7 and the peak louvers 6 are opened. Under the action of the induced draft fan 15, the fresh air is divided into two paths. One path enters the first chamber 101, the second chamber 102, and the evaporator coil 4 through the antifreeze louvers 7 in sequence, and performs heat exchange with the evaporator coil 4. The humid and hot air after heat exchange enters the precooling device 16 through the fourth chamber 104 for heat exchange with the evaporator coil 4. The other path of fresh air enters the peak device 3 through the peak louvers 6, but does not perform heat exchange with the peak device 3. It enters the precooling device 16 through the third chamber 103 and the fourth chamber 104 for heat exchange with the evaporator coil 16. This flow channel serves as a supplementary fresh air channel for the precooling device 16 and is finally discharged into the atmosphere by the induced draft fan 15. Peak device 3 and peak spray device 9 are in a stopped state. The spray water only exchanges heat with the evaporator coil 4 through the wall, and the temperature rises. Under the action of gravity, it falls into the hot water tank 10. The side plate of the hot water tank 10 is lower than the cold water tank 11 or an overflow guide pipe 13 is installed. The spray water after heat exchange overflows from the hot water tank 10 to the cold water tank 11. The evaporator coil spray device 12 transports the spray water in the cold water tank 11 to the evaporator coil 4 for indirect heat exchange, and so on.

[0047] Now combined Figure 2The water outage operation mode of the present invention is explained as follows: In the water outage operation mode, as the ambient temperature further decreases, the heat exchange capacity of the precooling device 16 is further enhanced. At this time, the peak device 3 and the peak spray device 9 are shut down, the evaporator coil spray device 12 is shut down, and the spray water stored in the hot water tank 10 and the cold water tank 11 should be drained in advance to prepare for winter freezing. The evaporator coil 4, as a dry heat exchange component, participates in heat exchange. When the antifreeze louvers 7 and the peak louvers 6 are opened, the fresh air is divided into two paths under the action of the exhaust fan 15. One path enters the first chamber 101, the second chamber 102, and the evaporator coil 4 through the antifreeze louvers 7, where it undergoes dry heat exchange with the evaporator coil 4. The dry air after heat exchange enters the pre-cooling device 16 through the fourth chamber 104 for heat exchange. The other path enters the peak device 3 through the peak louvers 6, where it does not undergo heat exchange with the peak device 3. It then enters the pre-cooling device 16 through the third chamber 103 and the fourth chamber 104 for heat exchange. This flow channel serves as the main fresh air passage of the pre-cooling device 16 and is finally exhausted to the atmosphere by the exhaust fan 15.

[0048] Now combined Figure 2 The antifreeze operation mode of the present invention is explained as follows: When the ambient temperature drops further and the heat exchange equipment is no longer needed to cool the medium, the antifreeze mode is executed. At this time, the antifreeze louvers 7 and the peak louvers 6 are closed, and the induced draft fan 15, the peak spray device 9, and the evaporator coil spray device 12 are all stopped. Since all the louvers are closed, the induced draft fan 15 will not generate suction, and the medium in the evaporator coil 4 retains heat, forming a natural warm room inside the equipment, which is beneficial for the antifreeze operation of the equipment.

[0049] As one of the simplified or modified structures of the present invention, such as Figure 1 As shown, it is similar to Figure 2 The difference shown is that there is no pre-cooling device 16. Therefore, in non-peak operation mode, the peak louver 6 is closed and no fresh air is introduced; the peak device 3 and the peak spray device 9 are shut down, and heat exchange is carried out only by the evaporator coil 4.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for controlling the operation mode of a mixed-flow, peak-type composite wet air cooler, characterized in that, The operation mode control is based on ambient temperature and operating requirements to switch the operating status of the air cooler. The air cooler includes at least antifreeze louvers (7), peak louvers (6), peak device (3), peak spray device (9), evaporator coil (4), evaporator coil spray device (12), hot water tank (10), cold water tank (11), precooling device (16), and induced draft fan (15). The control method includes: When the ambient temperature is high and the cooling capacity needs to be enhanced, the antifreeze louvers (7) and peak louvers (6) are opened, and the induced draft fan (15), peak spray device (9) and evaporator coil spray device (12) are started, so that fresh air enters through the antifreeze louvers (7) and peak louvers (6) respectively, and exchanges heat with the evaporator coil (4) and peak device (3) respectively. The spray water circulates between the hot water pool (10) and the cold water pool (11) to realize the peak operation mode. When the ambient temperature decreases and the heat exchange capacity of the precooling device (16) increases, the antifreeze louvers (7) and the peak louvers (6) are opened, the induced draft fan (15) and the evaporator coil spray device (12) are started, and the peak device (3) and the peak spray device (9) are stopped, so that part of the fresh air can exchange heat with the evaporator coil (4) in the wall, and another part of the fresh air forms a supplementary fresh air channel through the peak device (3) and enters the precooling device (16) to realize the joint operation mode; When the ambient temperature drops further, control the opening of the antifreeze louvers (7) and the peak louvers (6), start the induced draft fan (15), stop the peak device (3), the peak spray device (9) and the evaporator coil spray device (12), and drain the spray water in the hot water tank (10) and the cold water tank (11) so that the evaporator coil (4) can participate in heat exchange in a dry heat exchange mode to achieve the water outage operation mode; When the ambient temperature drops further and there is no need to cool the medium, the antifreeze louvers (7) and peak louvers (6) are closed, and the induced draft fan (15), peak spray device (9) and evaporator coil spray device (12) are stopped, so that the air cooler is in a closed and heat-insulating state, and the antifreeze operation mode is realized.

2. A mixed-flow peak-composite wet air cooler for implementing the operating mode control method of claim 1, characterized in that, The enclosure includes a housing (1), inside which a partition (14) is installed. The partition (14) divides the internal space of the housing (1) into two interconnected cavities, an upper and a lower one. An evaporator coil (4) is installed in the upper cavity at the position where the two cavities connect, so that when the airflow in the lower cavity enters the upper cavity, it can contact the evaporator coil (4). A first air inlet (5) is provided on the side wall of the upper cavity. A spike device (3) is installed in the upper cavity near the first air inlet (5). The spike device (3) and the evaporator coil (4) are connected. A third chamber (103) is formed between the boxes (1) and a fourth chamber (104) is formed inside the box (1) and above the evaporator coil (4). The fourth chamber (104) is connected to the third chamber (103). A cold water pool (11) and a hot water pool (10) are provided below the box (1). A peak spray device (9) is provided between the hot water pool (10) and the peak device (3) to transport the water in the hot water pool (10) upward to the peak device (3) through the peak spray device (9). The cold water after being heated by the peak device (3) can flow into the cold water pool (11).

3. A mixed-flow, peak-type composite wet air cooler according to claim 2, characterized in that, A blower (15) is installed on the top of the housing (1).

4. A mixed-flow, peak-type composite wet air cooler according to claim 2, characterized in that, A water collector (2) is installed inside the housing (1) and above the evaporator coil (4). An evaporator coil spraying device (12) is provided below the water collector (2). The evaporator coil spraying device (12) is used to transport water from the cold water pool (11) to the top of the evaporator coil (4) and spray it onto the surface of the evaporator coil (4).

5. A mixed-flow, peak-type composite wet air cooler according to claim 2, characterized in that, The side wall of the housing (1) where the first air inlet (5) is located is equipped with a pointed louver (6); it also includes a second air inlet (8) located on the side wall of the lower cavity, and an antifreeze louver (7) is installed at the second air inlet (8).

6. A mixed-flow, peak-type composite wet air cooler according to claim 5, characterized in that, There are two sets of second air inlets (8), located on both sides of the box (1) in the lower cavity.

7. A mixed-flow, peak-type composite wet air cooler according to claim 5, characterized in that, The lower cavity near the second air inlet (8) forms a first chamber (101), and the area of ​​the lower cavity below the evaporator coil (4) forms a second chamber (102). The first chamber (101) and the second chamber (102) are connected to each other.

8. A mixed-flow, peak-type composite wet air cooler according to claim 2, characterized in that, There are two sets of spike devices (3) inside the box (1), and the two sets of spike devices (3) are located on both sides inside the box (1); there are two sets of first air inlets (5), and they are located on the side wall of the box (1) near the spike devices (3).

9. A mixed-flow, peak-type composite wet air cooler according to claim 2, characterized in that, A guide pipe (13) is connected below the peak device (3), and the guide pipe (13) is connected to the cold water pool (11); the hot water pool (10) is connected to the cold water pool (11), and the water in the hot water pool (10) can overflow into the cold water pool (11) when the liquid level reaches a predetermined height.

10. A mixed-flow, peak-type composite wet air cooler according to claim 2, characterized in that, It also includes a precooling device (16), which is installed inside the housing (1) and located above the evaporator coil (4). The precooling device (16) is connected to the evaporator coil (4) and is configured to allow the working medium to enter the precooling device (16) for precooling before entering the evaporator coil (4) for further cooling.

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