Double-core-body down-flow type upper spraying indirect evaporative cooling air conditioning unit

Abstract

The utility model relates to the technical field of air conditioners, in particular to a double-core-body down-flow type upper spraying indirect evaporative cooling air conditioning unit which comprises a box body. An exhaust cavity is formed in the middle of the box body; a first heat exchange core body and a second heat exchange core body are arranged on the two sides of the box body correspondingly. A first condenser and a second condenser are arranged at the top of the exhaust cavity; a water tank is arranged at the bottom of the exhaust cavity; the box body is provided with an exhaust outlet communicated with the exhaust cavity; an exhaust fan is arranged between the exhaust cavity and the exhaust outlet; the box body is provided with a fresh air opening. The flowing direction of spraying water is kept consistent with the flowing direction of outdoor fresh air, uniform and stable water films are easily formed on the surfaces of the first heat exchange core body and the second heat exchange core body, and the heat exchange effect is improved; in addition, the first heat exchange core body and the second heat exchange core body are arranged on the two sides of the box body respectively, the water tank is located between the two heat exchange core bodies, the two heat exchange core bodies share one water tank, the structure is simple, maintenance is convenient, and the water leakage risk and the production cost are reduced.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, specifically to a dual-core, co-current, top-spray, indirect evaporative cooling air conditioning unit. Background Technology

[0002] Driven by the demands of applications such as 5G, IoT, cloud computing, and AI, data centers have experienced explosive growth. Indirect evaporative cooling (EVA) air conditioning units are widely used in data centers due to their high energy efficiency. A typical EVA air conditioning unit for data centers includes a spray system, a mechanical refrigeration system, an indoor air system, an outdoor air system, and a heat exchange core for heat exchange between indoor and outdoor air. Existing EVA air conditioning systems for data centers mainly operate in three modes: dry mode, wet mode, and a hybrid mode consisting of wet mode and a mechanical refrigeration system. Under different meteorological conditions, the coordinated and switching operation of the evaporative cooling system and the mechanical refrigeration system enables seasonal and time-of-day control and adjustment. Secondary exhaust air is used to cool the condenser of the mechanical refrigeration system, achieving multi-stage energy utilization and effectively improving energy efficiency and the system's energy efficiency ratio.

[0003] To address the issues of long heat exchange flow paths, high core resistance, and high fan power in traditional indirect evaporative cooling air conditioning units that use a single heat exchange core, some technical solutions with dual heat exchange cores are proposed.

[0004] The existing dual heat exchanger core technology has the following drawbacks:

[0005] 1. The existing solution uses an upward spraying method, where outdoor air flows from bottom to top and spraying liquid flows from top to bottom. The opposite flow direction increases outdoor resistance and also prevents the spraying liquid droplets from wetting the entire core surface, thus failing to effectively utilize the core's heat exchange surface area.

[0006] 2. In the existing scheme, the two heat exchange cores are closely adjacent, and the space at the outlet of the indoor circulating air after passing through the heat exchange cores is limited, resulting in greater airflow resistance and higher fan power consumption.

[0007] 3. In the existing system, the sprinkler water tank is located at the outdoor fresh air inlet. When the outdoor temperature is low, the tank needs to be emptied to prevent it from freezing. This is especially wasteful when there is a large temperature difference between day and night, as the tank is replenished during the day and drained at night.

[0008] 4. The existing dual heat exchanger core solution requires two water tanks, which results in a large workload for cleaning and maintenance, a high risk of leakage due to the numerous water tank interfaces, a more complex manufacturing process, and a significant increase in cost. Utility Model Content

[0009] The purpose of this invention is to address the aforementioned shortcomings in the existing technology by providing a dual-core, co-current, top-spray indirect evaporative cooling air conditioning unit.

[0010] The purpose of this utility model is achieved through the following technical solution: a dual-core co-current top spray indirect evaporative cooling air conditioning unit, including a housing; an exhaust chamber is provided in the middle of the housing; a first heat exchange core and a second heat exchange core are respectively provided on both sides of the housing; the first heat exchange core is provided with a first air duct and a second air duct; the second heat exchange core is provided with a third air duct and a fourth air duct;

[0011] The bottom of the first air duct and the bottom of the third air duct are respectively located on both sides of the exhaust chamber and are connected to the exhaust chamber; the top of the exhaust chamber is provided with a first condenser and a second condenser; the bottom of the exhaust chamber is provided with a water tank; the top of the first air duct is provided with a first spray pipe; the top of the third air duct is provided with a second spray pipe.

[0012] The housing is provided with an exhaust port that communicates with the exhaust chamber; an exhaust fan is provided between the exhaust chamber and the exhaust port; the housing is provided with a fresh air inlet; the top of the first air duct and the top of the third air duct are respectively connected to the fresh air inlet.

[0013] The present invention is further configured such that the fresh air inlet includes a first fresh air inlet and a second fresh air inlet; the top of the first air duct is connected to the first fresh air inlet; and the top of the third air duct is connected to the second fresh air inlet.

[0014] The first fresh air inlet is located on one side wall of the housing; the second fresh air inlet is located on the other side wall of the housing; and the exhaust outlet is located in the middle of the top surface of the housing.

[0015] The present invention is further configured such that the first fresh air inlet is provided with a first fresh air filter; the second fresh air inlet is provided with a second fresh air filter; and one end of the first condenser abuts against one end of the second condenser.

[0016] The present invention is further configured such that a first air supply cavity is formed between the bottom of the second air duct and one side wall of the housing; a second air supply cavity is formed between the bottom of the fourth air duct and the other side wall of the housing; the first air supply cavity is provided with a first evaporator; and the second air supply cavity is provided with a second evaporator.

[0017] The housing is provided with a return air inlet and an air supply outlet; the top of the second air duct and the top of the fourth air duct are respectively connected to the return air inlet; the first air supply chamber and the second air supply chamber are respectively connected to the air supply outlet; a first air supply fan is provided between the first air supply chamber and the air supply outlet; a second air supply fan is provided between the second air supply chamber and the air supply outlet.

[0018] The present invention is further configured such that the return air inlet includes a first return air inlet and a second return air inlet; the top of the second air duct is connected to the first return air inlet; and the top of the fourth air duct is connected to the second return air inlet.

[0019] The first return air inlet and the second return air inlet are respectively located on both sides of the upper part of the box body's cross-section; the air supply outlet is located at the lower part of the box body's cross-section.

[0020] The present invention is further configured such that a first return air filter is provided between the top of the second air duct and the first return air inlet; and a second return air filter is provided between the top of the fourth air duct and the second return air inlet.

[0021] The present invention is further configured such that the first heat exchange core and the second heat exchange core are both air-to-air heat exchangers; the cross-sectional shape of the first heat exchange core and the cross-sectional shape of the second heat exchange core are both square; the first air duct and the second air duct are arranged intersectingly; and the third air duct and the fourth air duct are arranged intersectingly.

[0022] The present invention is further configured such that the middle part of the box body is provided with a top crossbeam, a bottom crossbeam, a first vertical beam, a second vertical beam, a first side beam, and a second side beam;

[0023] The first heat exchange core is provided with a first connecting surface at the position corresponding to the bottom of the first air duct; the second heat exchange core is provided with a second connecting surface at the position corresponding to the bottom of the third air duct.

[0024] The exhaust cavity is sequentially enclosed by a top crossbeam, a first vertical beam, a first connecting surface, a first side beam, a bottom crossbeam, a second side beam, a second connecting surface, and the plane containing the second vertical beam.

[0025] The present invention is further configured such that the water tank is enclosed by a partition containing a first side beam, a bottom crossbeam, and a second side beam.

[0026] The present invention is further configured such that the first side beam is inclinedly disposed within the box body; and the second side beam is inclinedly disposed within the box body.

[0027] The beneficial effects of this utility model are as follows: This utility model ensures that the flow direction of the spray water is consistent with the flow direction of the outdoor fresh air, and a uniform and stable water film is easily formed on the surface of the first heat exchange core and the surface of the second heat exchange core, thereby improving the heat exchange effect; in addition, the first heat exchange core and the second heat exchange core are arranged on both sides of the box, and the water tank is located between the two heat exchange cores, with the two heat exchange cores sharing one water tank, which is simple in structure, convenient in maintenance, and reduces the risk of water leakage and production costs. Attached Figure Description

[0028] The utility model will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present utility model. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of this utility model;

[0030] The components are: 1. Housing; 2. First heat exchange core; 21. First air duct; 22. Second air duct; 23. First spray pipe; 3. Second heat exchange core; 31. Third air duct; 32. Fourth air duct; 33. Second spray pipe; 4. Exhaust chamber; 41. First condenser; 42. Second condenser; 43. Water tank; 44. Exhaust fan; 5. Exhaust outlet; 51. First fresh air inlet; 52. Second fresh air inlet; 61. First air supply chamber; 62. ... 63. First evaporator; 64. Second evaporator; 65. First air supply fan; 66. Second air supply fan; 7. Air outlet; 71. First return air outlet; 72. Second return air outlet; 73. First return air filter; 74. Second return air filter; 81. Top crossbeam; 82. Bottom crossbeam; 83. First vertical beam; 84. Second vertical beam; 85. First side beam; 86. Second side beam; 91. First connecting surface; 92. Second connecting surface. Detailed Implementation

[0031] The present invention will be further described in conjunction with the following embodiments.

[0032] Depend on Figure 1 As can be seen, the dual-core co-current top spray indirect evaporative cooling air conditioning unit described in this embodiment includes a housing 1; an exhaust chamber 4 is provided in the middle of the housing 1; a first heat exchange core 2 and a second heat exchange core 3 are respectively provided on both sides of the housing 1; the first heat exchange core 2 is provided with a first air duct 21 and a second air duct 22; the second heat exchange core 3 is provided with a third air duct 31 and a fourth air duct 32;

[0033] The bottom of the first air duct 21 and the bottom of the third air duct 31 are respectively located on both sides of the exhaust cavity 4 and are connected to the exhaust cavity 4; the top of the exhaust cavity 4 is provided with a first condenser 41 and a second condenser 42; the bottom of the exhaust cavity 4 is provided with a water tank 43; the top of the first air duct 21 is provided with a first spray pipe 23; the top of the third air duct 31 is provided with a second spray pipe 33.

[0034] The housing 1 is provided with an exhaust port 5 that communicates with the exhaust chamber 4; an exhaust fan 44 is provided between the exhaust chamber 4 and the exhaust port 5; the housing 1 is provided with a fresh air inlet; the top of the first air duct 21 and the top of the third air duct 31 are respectively connected to the fresh air inlet; wherein the first spray pipe 23 and the second spray pipe 33 are respectively connected to the water tank 43 through a water pump.

[0035] Specifically, the dual-core forward-flow top-spray indirect evaporative cooling air conditioning unit described in this embodiment can effectively improve the heat exchange efficiency of the whole unit by simultaneously setting the first heat exchange core 2 and the second heat exchange core 3 in the housing 1. In addition, during use, under the action of the exhaust fan 44, outdoor fresh air enters the first air duct 21 and the third air duct 31 from the fresh air inlet, and after heat exchange and temperature rise, it enters the exhaust chamber 4 for mixing. After passing through the first condenser 41 and the second condenser 42, the heated outdoor fresh air and the heat from the first condenser 41 and the second condenser 42 are discharged from the housing 1 through the exhaust port 5.

[0036] In addition, this embodiment adopts an upper spraying method. The first spray pipe 23 and the second spray pipe 33 of the spraying system are respectively located at the top of the first air duct 21 and the top of the third air duct 31. The water in the water tank 43 is pressurized by the water pump and flows into the first spray pipe 23 and the second spray pipe 33. Then, it is sprayed onto the first heat exchange core 2 and the second heat exchange core 3 through the nozzles. The sprayed water can flow from the upper sides to the lower middle in the direction of the outdoor fresh air flow. The sprayed water evaporates and absorbs heat in the first heat exchange core 2 and the second heat exchange core 3, and cools the inner surface of the first air duct 21 of the first heat exchange core 2, the inner surface of the third air duct 31 of the second heat exchange core 3, and the outdoor fresh air. Finally, the sprayed water that is not evaporated flows into the water tank 43.

[0037] This embodiment, through the above-described configuration, ensures that the flow direction of the spray water is consistent with the flow direction of the outdoor fresh air. A uniform and stable water film easily forms on the surface of the first air duct 21 of the first heat exchange core 2 and the surface of the third air duct 31 of the second heat exchange core 3, improving the evaporative heat exchange effect. Furthermore, the water tank 43 is located on the air outlet side of both the first and second heat exchange cores 2 and 3. Because the first air duct 21 of the first heat exchange core 2 exchanges heat with the indoor high-temperature airflow through the second air duct 22, and the third air duct 31 of the second heat exchange core 3 exchanges heat with the indoor high-temperature airflow through the fourth air duct 32, even if the outdoor fresh air temperature is very low, the water tank 43 on the air outlet side can maintain a temperature above 0°C after being heated by the heat exchange cores. Therefore, compared to the traditional method where the water tank is directly in contact with the outdoor fresh air, there is no need to drain the water from the water tank 43 for antifreeze purposes, saving energy. Water resources; secondly, the first heat exchange core 2 and the second heat exchange core 3 are arranged on both sides of the housing 1, and the water tank 43 is located between the two heat exchange cores. The two heat exchange cores share one water tank 43, which is simple in structure, easy to maintain, and reduces the risk of water leakage and production costs; in addition, the first condenser 41, the second condenser 42 and the water tank 43 are located in the same space. After the water in the water tank 43 evaporates naturally, the air humidity in the exhaust cavity 4 is high, which helps to reduce the inlet air temperature of the first condenser 41 and the second condenser 42 and improve the heat exchange efficiency of the outdoor fresh air flow at the two condensers. Compared with the traditional method of setting the spray pipe close to the condenser, because the water in the water tank 43 is directly used to increase the outdoor fresh air humidity by evaporating naturally, the air humidity is increased and there is no need to set up a baffle to prevent excessive humidity from affecting the service life of the two condensers and the exhaust fan 44.

[0038] The dual-core, co-current, top-spray indirect evaporative cooling air conditioning unit described in this embodiment includes a first fresh air inlet 51 and a second fresh air inlet 52. The top of the first air duct 21 is connected to the first fresh air inlet 51, and the top of the third air duct 31 is connected to the second fresh air inlet 52. With the above arrangement, outdoor fresh air enters the first air duct 21 and the third air duct 31 from the first fresh air inlet 51 and the second fresh air inlet 52, respectively, making the entire unit structure more reasonable and reliable.

[0039] The first fresh air inlet 51 is located on one side wall of the housing 1; the second fresh air inlet 52 is located on the other side wall of the housing 1; and the exhaust outlet 5 is located in the center of the top surface of the housing 1. This arrangement allows for stable airflow. The simultaneous placement of fresh air inlets on the opposite left and right side walls of the unit results in a larger inlet area. Under the same airflow velocity, the volume of outdoor fresh air participating in heat exchange is also greater. Therefore, within the same operating time of the unit, more outdoor cold source can be utilized, making the entire unit more energy-efficient. Furthermore, the opposite left-right arrangement ensures the overall structural stability and reliability of the unit.

[0040] This embodiment describes a dual-core, co-current, top-spray indirect evaporative cooling air conditioning unit. The first fresh air inlet 51 is equipped with a first fresh air filter; the second fresh air inlet 52 is equipped with a second fresh air filter; one end of the first condenser 41 abuts against one end of the second condenser 42. This arrangement prevents impurities such as leaves and dust carried by the outdoor fresh air from entering the first air duct 21 and the third air duct 31.

[0041] In this embodiment, a dual-core, co-current, top-spray indirect evaporative cooling air conditioning unit is described. A first air supply chamber 61 is formed between the bottom of the second air duct 22 and one side wall of the housing 1; a second air supply chamber 62 is formed between the bottom of the fourth air duct 32 and the other side wall of the housing 1; the first air supply chamber 61 is equipped with a first evaporator 63; and the second air supply chamber 62 is equipped with a second evaporator 64.

[0042] The housing 1 is provided with a return air inlet and an air supply outlet 7; the top of the second air duct 22 and the top of the fourth air duct 32 are respectively connected to the return air inlet; the first air supply chamber 61 and the second air supply chamber 62 are respectively connected to the air supply outlet 7; a first air supply fan 65 is provided between the first air supply chamber 61 and the air supply outlet 7; a second air supply fan 66 is provided between the second air supply chamber 62 and the air supply outlet 7.

[0043] During use, under the action of the first air supply fan 65 and the second air supply fan 66, indoor return air enters the second air duct 22 and the fourth air duct 32 from the return air inlet, and then enters the first air supply chamber 61 and the second air supply chamber 62 respectively. After passing through the first evaporator 63 and the second evaporator 64 respectively, cold air is delivered to the room from the air supply outlet 7. In this embodiment, by setting the first evaporator 63 and the second evaporator 64 on both sides of the housing 1, it is convenient to open the side panel of the housing 1 to disassemble or repair the evaporators. In addition, by setting the first air supply fan 65 and the second air supply fan 66, two rows of air supply fans in the housing 1 can effectively increase the air supply volume, thereby further improving the heat exchange efficiency of the whole machine. Under the energy-saving strategy, different numbers of fans can be selectively shut down to achieve the matching of cooling capacity and cooling demand. In addition, the two evaporators are placed below the heat exchange cores on both sides and are not isolated and sealed by the air ducts, which is conducive to inspection and maintenance.

[0044] This embodiment describes a dual-core, co-current, top-spray indirect evaporative cooling air conditioning unit. The return air inlets include a first return air inlet 71 and a second return air inlet 72. The top of the second air duct 22 is connected to the first return air inlet 71. The top of the fourth air duct 32 is connected to the second return air inlet 72. The first and second return air inlets 71 and 72 are respectively located on the upper left and right sides of the cross-section of the housing 1. The supply air outlet 7 is located at the lower part of the cross-section of the housing 1. By placing the first and second return air inlets 71 and 72 on the top sides of the housing 1, the airflow pressures do not interfere with each other, increasing the duct space for indoor circulating air. This allows for the side-by-side placement of two rows of supply fans, reducing indoor airflow resistance and fan power consumption. Indoor airflow can enter and exit horizontally, with the hot return air at the top and the cold supply air at the bottom, facilitating connection with ductwork in external data center server rooms and ensuring stable airflow.

[0045] In this embodiment, a dual-core, co-current, top-spray indirect evaporative cooling air conditioning unit is provided with a first return air filter 73 between the top of the second air duct 22 and the first return air inlet 71; and a second return air filter 74 between the top of the fourth air duct 32 and the second return air inlet 72. This arrangement prevents impurities from entering the second air duct 22 and the fourth air duct 32.

[0046] This embodiment describes a dual-core, co-current, top-spray indirect evaporative cooling air conditioning unit. Both the first heat exchange core 2 and the second heat exchange core 3 are air-to-air heat exchangers. This arrangement effectively facilitates heat exchange between the first air duct 21 and the second air duct 22, and between the third air duct 31 and the fourth air duct 32. The cross-sectional shapes of both the first and second heat exchange cores are square. The square shape of the heat exchange cores allows one diagonal to be parallel to the horizontal direction and the other diagonal to be parallel to the vertical direction. This arrangement ensures sufficient contact between the airflow within the core air ducts, achieving efficient heat conduction. The first and second air ducts 21 and 22 are intersecting, as are the third and fourth air ducts 31 and 32. This arrangement facilitates heat exchange between the first and second air ducts 21 and 22, and between the third and fourth air ducts 31 and 32.

[0047] This embodiment describes a dual-core, co-current, top-spray indirect evaporative cooling air conditioning unit. The housing 1 has a top crossbeam 81, a bottom crossbeam 82, a first vertical beam 83, a second vertical beam 84, a first side beam 85, and a second side beam 86 in the middle. The first heat exchange core 2 has a first connecting surface 91 at the bottom of the first air duct 21. The second heat exchange core 3 has a second connecting surface 92 at the bottom of the third air duct 31. The exhaust chamber 4 is formed by the plane containing the top crossbeam 81, the first vertical beam 83, the first connecting surface 91, the first side beam 85, the bottom crossbeam 82, the second side beam 86, the second connecting surface 92, and the second vertical beam 84, forming a long-necked flask shape. The above configuration ensures the overall structure of the exhaust chamber 4 is stable and reliable, and allows for stable flow of outdoor fresh air. Simultaneously, the bottle-shaped bottom, serving as the water tank 43, provides a larger capacity and more space, which facilitates thorough mixing of the outdoor fresh air after heat exchange in the core at the water tank 43 before it participates in heat exchange at the condenser. This results in a more uniform airflow with higher heat exchange efficiency. The long-necked exhaust chamber channel helps increase the air pressure of the exhaust fan 44 and the air velocity at the condenser. As the airflow moves from the large bottom to the narrow neck, it increases the air velocity under the influence of fluid dynamics, thereby enhancing heat exchange efficiency.

[0048] In this embodiment, a dual-core, co-current, top-spray indirect evaporative cooling air conditioning unit is described, wherein the water tank 43 is directly enclosed by a partition at the locations of the first side beam 85, the bottom crossbeam 82, and the second side beam 86. With this configuration, there is no need for an additional water tank 43.

[0049] Furthermore, a separate water tank 43 can be installed, with its walls fitted against the partitions at the first side beam 85, the bottom crossbeam 82, and the second side beam 86. With this configuration, the water tank 43 can be directly removed for maintenance from the end of the unit not connected to the air duct.

[0050] This embodiment describes a dual-core, co-current, top-spray indirect evaporative cooling air conditioning unit. The first side beam 85 is inclined within the housing 1; the second side beam 86 is also inclined within the housing 1. This arrangement facilitates the collection of spray water that has not completely evaporated within the heat exchange core into the center of the water tank 43.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A dual-core, co-current, top-spray indirect evaporative cooling air conditioning unit, characterized in that: Includes a housing (1); the housing (1) has an exhaust chamber (4) in the middle; the housing (1) has a first heat exchange core (2) and a second heat exchange core (3) on its two sides respectively; the first heat exchange core (2) has a first air duct (21) and a second air duct (22); the second heat exchange core (3) has a third air duct (31) and a fourth air duct (32); The bottom of the first air duct (21) and the bottom of the third air duct (31) are respectively located on both sides of the exhaust cavity (4) and communicate with the exhaust cavity (4); the top of the exhaust cavity (4) is provided with a first condenser (41) and a second condenser (42); the bottom of the exhaust cavity (4) is provided with a water tank (43); the top of the first air duct (21) is provided with a first spray pipe (23); the top of the third air duct (31) is provided with a second spray pipe (33); The housing (1) is provided with an exhaust port (5) that communicates with the exhaust chamber (4); an exhaust fan (44) is provided between the exhaust chamber (4) and the exhaust port (5); the housing (1) is provided with a fresh air inlet; the top of the first air duct (21) and the top of the third air duct (31) are respectively connected to the fresh air inlet.

2. The dual-core co-current upward spray indirect evaporative cooling air conditioning unit according to claim 1, characterized in that: The fresh air inlet includes a first fresh air inlet (51) and a second fresh air inlet (52); the top of the first air duct (21) is connected to the first fresh air inlet (51); the top of the third air duct (31) is connected to the second fresh air inlet (52); The first fresh air inlet (51) is located on one side wall of the housing (1); the second fresh air inlet (52) is located on the other side wall of the housing (1); and the exhaust outlet (5) is located in the middle of the top surface of the housing (1).

3. The dual-core co-current upward spray indirect evaporative cooling air conditioning unit according to claim 2, characterized in that: The first fresh air inlet (51) is provided with a first fresh air filter; the second fresh air inlet (52) is provided with a second fresh air filter; one end of the first condenser (41) abuts against one end of the second condenser (42).

4. The dual-core co-current upward spray indirect evaporative cooling air conditioning unit according to claim 1, characterized in that: A first air supply cavity (61) is formed between the bottom of the second air duct (22) and one side wall of the housing (1); a second air supply cavity (62) is formed between the bottom of the fourth air duct (32) and the other side wall of the housing (1); the first air supply cavity (61) is provided with a first evaporator (63); the second air supply cavity (62) is provided with a second evaporator (64); The housing (1) is provided with a return air inlet and an air supply outlet (7); the top of the second air duct (22) and the top of the fourth air duct (32) are respectively connected to the return air inlet; the first air supply chamber (61) and the second air supply chamber (62) are respectively connected to the air supply outlet (7); a first air supply fan (65) is provided between the first air supply chamber (61) and the air supply outlet (7); a second air supply fan (66) is provided between the second air supply chamber (62) and the air supply outlet (7).

5. A dual-core co-current upward spray indirect evaporative cooling air conditioning unit according to claim 4, characterized in that: The return air inlet includes a first return air inlet (71) and a second return air inlet (72); the top of the second air duct (22) is connected to the first return air inlet (71); the top of the fourth air duct (32) is connected to the second return air inlet (72); The first return air inlet (71) and the second return air inlet (72) are respectively located on both sides of the upper part of the cross section of the box body (1); the air supply inlet (7) is located on the lower part of the cross section of the box body (1).

6. A dual-core, co-current, top-spray, indirect evaporative cooling air conditioning unit according to claim 5, characterized in that: A first return air filter (73) is provided between the top of the second air duct (22) and the first return air inlet (71); a second return air filter (74) is provided between the top of the fourth air duct (32) and the second return air inlet (72).

7. A dual-core, co-current, top-spray, indirect evaporative cooling air conditioning unit according to claim 1, characterized in that: The first heat exchange core (2) and the second heat exchange core (3) are both air-to-air heat exchangers; the cross-sectional shape of the first heat exchange core (2) and the cross-sectional shape of the second heat exchange core (3) are both square; the first air duct (21) and the second air duct (22) are arranged intersectingly; the third air duct (31) and the fourth air duct (32) are arranged intersectingly.

8. A dual-core co-current upward spray indirect evaporative cooling air conditioning unit according to claim 1, characterized in that: The box (1) is provided with a top crossbeam (81), a bottom crossbeam (82), a first vertical beam (83), a second vertical beam (84), a first side beam (85), and a second side beam (86) in the middle. The first heat exchange core (2) is provided with a first connecting surface (91) at the bottom position of the first air duct (21); the second heat exchange core (3) is provided with a second connecting surface (92) at the bottom position of the third air duct (31); The exhaust cavity (4) is formed by the plane containing the top horizontal beam (81), the first vertical beam (83), the first connecting surface (91), the first side beam (85), the bottom horizontal beam (82), the second side beam (86), the second connecting surface (92), and the second vertical beam (84) in sequence.

9. A dual-core, co-current, top-spray, indirect evaporative cooling air conditioning unit according to claim 8, characterized in that: The water tank (43) is enclosed by a partition containing the first side beam (85), the bottom crossbeam (82), and the second side beam (86).

10. A dual-core, co-current, top-spray indirect evaporative cooling air conditioning unit according to claim 9, characterized in that: The first side beam (85) is inclinedly disposed inside the box body (1); the second side beam (86) is inclinedly disposed inside the box body (1).

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