Three-stage evaporative cooling air conditioning unit combined with radiation refrigeration

Abstract

The utility model discloses a three-stage evaporative cooling air conditioning unit combined with radiation refrigeration, which comprises a unit shell, and a primary air inlet and a primary air supply outlet are respectively arranged on two opposite side walls of the unit shell. A filter, a radiation refrigeration cold water coil pipe, an indirect evaporation cooling section, a direct evaporation cooling section, a water baffle b and a primary air blower are sequentially arranged in the unit shell in the air flowing direction. A secondary air exhaust port is also formed in the top wall of the unit shell corresponding to the upper part of the indirect evaporative cooling section; a secondary air inlet is further formed in the position, corresponding to the indirect evaporation cooling section, of the side wall of the unit shell. A radiation refrigeration plate unit is further arranged outside the unit shell, and the radiation refrigeration plate unit and the radiation refrigeration cold water coil pipe are connected to form a closed loop. The unit can further fully utilize a natural cold source, reduces the energy consumption of a data center cooling system, and provides a new solution for a data center efficient cooling technology.

Description

Technical Field

[0001] The utility model belongs to the technical field of air conditioning and refrigeration, and in particular relates to a three-stage evaporative cooling air conditioning unit combined with radiation cooling. Background Art

[0002] The heat generated by individual cabinets in data centers is increasing, and the energy required to dissipate this heat load is also increasing. The cooling system accounts for a significant portion of data center energy consumption. Evaporative cooling technology offers advantages over traditional mechanical refrigeration, such as its ability to fully utilize natural cooling sources and the use of non-toxic and harmless refrigerants. Evaporative cooling air conditioners are gaining increasing attention for their energy-saving and environmental benefits. However, evaporative cooling air conditioners do not fully utilize natural cooling sources, such as radiant cooling technology. Utility Model Content

[0003] The purpose of this utility model is to provide a three-stage evaporative cooling air-conditioning unit combined with radiant cooling, which can further make full use of natural cold sources, reduce the energy consumption of the data center cooling system, and provide a new solution for efficient cooling technology in data centers.

[0004] The technical solution adopted by the present invention is a three-stage evaporative cooling air-conditioning unit combined with radiant cooling, comprising a unit housing, a primary air inlet and a primary air supply outlet respectively provided on two opposite side walls of the unit housing, a filter, a radiant cooling cold water coil, an indirect evaporative cooling section, a direct evaporative cooling section, a water baffle b and a primary air supply fan are sequentially provided in the unit housing between the primary air inlet and the primary air supply outlet according to the air flow direction; a secondary air exhaust outlet is further provided on the top wall of the unit housing corresponding to the indirect evaporative cooling section; and a secondary air inlet is further provided on the side wall of the unit housing corresponding to the indirect evaporative cooling section.

[0005] The unit shell also includes a radiation cooling plate unit, which is connected to the radiation cooling water coil to form a closed loop.

[0006] The utility model is also characterized in that:

[0007] The indirect evaporative cooling section includes a secondary air exhaust fan, a water baffle a, a water distributor a, an indirect evaporative cooler, and a water tank a, which are arranged in sequence from top to bottom. The water tank a is connected to the water distributor a through a first pipe.

[0008] A circulating water pump b is also provided on the first pipeline; the secondary air inlet is located on the side wall of the unit casing corresponding to the indirect evaporative cooler and the water tank a.

[0009] The water distributor a includes a water distribution pipe a, on which a plurality of nozzles a are provided, and the water distribution pipe a is connected to the first pipeline.

[0010] The direct evaporative cooling section includes a water distributor b, filler and water tank b arranged in sequence from top to bottom. The water tank b is connected to the water distributor b through a second pipe; a circulating water pump c is also provided on the second pipe.

[0011] The water distributor b includes a water distribution pipe b, a plurality of nozzles b are provided on the water distribution pipe b, and the water distribution pipe b is connected to the second pipeline.

[0012] The radiant cooling plate unit includes multiple radiant cooling plate assemblies connected in series, the water inlet of the radiant cooling plate assembly at the head end is connected to the water outlet of the radiant cooling cold water coil through a third pipe, and the water outlet of the radiant cooling plate assembly at the end end is connected to the water inlet of the radiant cooling cold water coil through a fourth pipe.

[0013] The radiation cooling plate assembly includes a cooling plate, an outer surface of one side of the cooling plate is coated with a radiation cooling paint layer; a cooling coil is embedded in the cooling plate, and the cooling coils of two adjacent radiation cooling plate assemblies are connected to each other. The water inlet of the cooling coil of the radiation cooling plate assembly at the head end is connected to the water outlet of the radiation cooling cold water coil through a third pipe, and the water outlet of the cooling coil of the radiation cooling plate assembly at the end is connected to the water inlet of the radiation cooling cold water coil through a fourth pipe.

[0014] The third pipeline is provided with a valve a.

[0015] The fourth pipeline is provided with a circulating water pump a and a valve b.

[0016] The filter is a blowing and suction disc return air filter.

[0017] The beneficial effects of the utility model are:

[0018] (1) This utility model combines evaporative cooling technology with radiant cooling technology, which can further fully utilize natural cooling sources and reduce the dependence on traditional electric-driven refrigeration systems during the cooling process. Compared with conventional air-conditioning systems, the multi-stage cooling strategy can significantly reduce energy consumption and operating costs, thereby providing strong support for the sustainable development of data centers.

[0019] (2) This utility model unit combines three cooling methods: radiation cooling, indirect cooling, and direct evaporative cooling. It can operate efficiently under different environmental conditions. The three-stage cooling design allows the system to maintain its cooling performance even under high load or high temperature conditions.

[0020] (3) The radiant cooling plate in this utility model can be directly attached to the surface of the unit. This design effectively reduces the equipment's footprint and facilitates installation and layout in environments with limited space. Through optimized design, the initial investment in the system is reduced, while the occupied building space is reduced, thereby improving site utilization.

[0021] (4) The radiant cooling unit and evaporative cooling section of the utility model can be flexibly combined according to actual needs, and different modes can be activated, allowing the system to adjust the cooling strategy according to different loads and environmental conditions. This not only improves the adaptability of the system, but also allows it to be expanded according to operational needs to meet future cooling needs.

[0022] (5) The utility model unit adopts a disc filter, which has the advantages of high efficiency, simple operation and maintenance, high degree of automation, and reduces labor costs compared with traditional bag filters. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of a three-stage evaporative cooling air-conditioning unit combined with radiant cooling according to the present invention;

[0024] Figure 2 This is a schematic structural diagram of the radiation cooling water coil in the utility model;

[0025] Figure 3 It is a structural schematic diagram of the radiation cooling plate assembly in the utility model.

[0026] In the figure, 1. primary air inlet, 2. filter, 3. radiant cooling water coil, 4. valve a, 5. radiant cooling plate assembly, 6. circulating water pump a, 7. valve b, 8. water tank a, 9. circulating water pump b, 10. secondary air inlet, 11. indirect evaporative cooler, 12. water distributor a, 13. water baffle a, 14. secondary air exhaust fan, 15. circulating water pump c, 16. water tank b, 17. packing, 18. water distributor b, 19. water baffle b, 20. primary air blower, 21. unit casing, 22. primary air supply port, 23. secondary air exhaust port, 24. first pipeline, 25. second pipeline, 26. third pipeline, 27. fourth pipeline;

[0027] 5-1. Refrigeration plate, 5-2. Refrigeration coil, 5-3. Radiant cooling coating layer; 12-1. Water distribution pipe a, 12-2. Nozzle a; 18-1. Water distribution pipe b, 18-2. Nozzle b. DETAILED DESCRIPTION

[0028] The present invention will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0029] The utility model provides a three-stage evaporative cooling air conditioning unit combined with radiant cooling, such as Figure 1-3As shown, it includes a unit shell 21, and a primary air inlet 1 and a primary air supply port 22 are respectively provided on two opposite side walls of the unit shell 21. A filter 2, a radiant cooling water coil 3, an indirect evaporative cooling section, a direct evaporative cooling section, a water baffle b19 and a primary air blower 20 are sequentially provided in the unit shell 21 between the primary air inlet 1 and the primary air supply port 22 according to the air flow direction; a secondary air exhaust port 23 is further provided on the top wall of the unit shell 21 corresponding to the indirect evaporative cooling section; and a secondary air inlet 10 is further provided on the side wall of the unit shell 21 corresponding to the indirect evaporative cooling section.

[0030] The unit housing 21 further includes a radiation cooling plate unit, which is connected to the radiation cooling water coil 3 to form a closed loop.

[0031] The indirect evaporative cooling section includes, from top to bottom, a secondary air exhaust fan 14, a water baffle a13, a water distributor a12, an indirect evaporative cooler 11, and a water tank a8. The water tank a8 is connected to the water distributor a12 via a first pipe 24.

[0032] A circulating water pump b9 is also provided on the first pipe 24; the secondary air inlet 10 is located on the side wall of the unit casing 21 corresponding to between the indirect evaporative cooler 11 and the water tank a8.

[0033] The water distributor a12 includes a water distribution pipe a12 - 1 , on which a plurality of nozzles a12 - 2 are provided. The water distribution pipe a12 - 1 is connected to the first pipeline 24 .

[0034] The direct evaporative cooling section includes a water distributor b18, a filler 17 and a water tank b16 arranged in sequence from top to bottom. The water tank b16 is connected to the water distributor b18 through a second pipe 25; a circulating water pump c15 is also provided on the second pipe 25.

[0035] The water distributor b18 includes a water distribution pipe b18 - 1 , on which a plurality of nozzles b18 - 2 are provided. The water distribution pipe b18 - 1 is connected to the second pipeline 25 .

[0036] The radiant cooling panel unit includes a plurality of radiant cooling panel assemblies 5 connected in series. The water inlet of the radiant cooling panel assembly 5 at the head end (cold water enters the radiant cooling water coil 3) is connected to the water outlet of the radiant cooling water coil 3 (hot water exits the radiant cooling water coil 3) through a third pipe 26, and the water outlet of the radiant cooling panel assembly 5 at the end is connected to the water inlet of the radiant cooling water coil 3 through a fourth pipe 27.

[0037] The hot water that has pre-cooled the air flows into the radiation cooling plate through the third pipe, is cooled, and then flows out. The cold water flows into the radiation cooling cold water coil again through the fourth pipe to circulate.

[0038] As shown in Figure 3 The radiation refrigeration plate assembly 5 comprises a refrigeration plate 5-1 (made of copper, and the outer surface of the refrigeration plate is sprayed with radiation refrigeration paint), and the outer surface of one side of the refrigeration plate 5-1 is coated with a radiation refrigeration paint layer 5-3 (obtained by coating the outer surface of the refrigeration plate 5-1 with ZS-222 heat-reflecting and heat-insulating paint); the refrigeration plate 5-1 is internally embedded with a refrigeration coil 5-2, the refrigeration coils 5-2 of two adjacent radiation refrigeration plate assemblies 5 are in communication with each other, the water inlet of the refrigeration coil 5-2 of the first radiation refrigeration plate assembly 5 is connected with the water outlet of the radiation refrigeration cold water coil 3 through a third pipeline 26, and the water outlet of the refrigeration coil 5-2 of the last radiation refrigeration plate assembly 5 is connected with the water inlet of the radiation refrigeration cold water coil 3 through a fourth pipeline 27. The hot water pre-cooled once flows into the radiation refrigeration plate through the third pipeline, is cooled inside the radiation refrigeration plate, and then flows out, and the cold water flows into the radiation refrigeration cold water coil again through the fourth pipeline to circulate.

[0039] The third pipeline 26 is provided with a valve a4.

[0040] The fourth pipeline 27 is provided with a circulating water pump a6 and a valve b7.

[0041] The filter 2 is a FC series blow-suction type disc return air filter produced by Wuxi Four Cotton Textile Co., Ltd. [1] .

[0042] The primary air inlet 1 of the unit adopts a flow guide grille air inlet, the secondary air exhaust fan 14 adopts an axial flow fan, and the primary air supply fan 20 adopts a centrifugal fan.

[0043] The radiation refrigeration first circulating water system comprises the radiation refrigeration cold water coil 3, the valve a4, a plurality of serially connected radiation refrigeration plate assemblies 5, the circulating water pump a6 and the valve b7, and is formed into a closed loop through pipelines. The radiation refrigeration cold water coil 3 is arranged between the filter 2 and the indirect evaporative cooling second circulating water system inside the unit shell 21, adopts a vertical pipe type n horizontal n vertical arrangement mode, and the specific number of pipe rows can be adjusted according to actual conditions. The plurality of radiation refrigeration plate assemblies 5 are connected in series, and if the unit is arranged in an open place such as a roof, the radiation refrigeration plate can be directly attached to the surface of the unit to save land occupation and initial investment of the system.

[0044] The secondary circulating water system for indirect evaporative cooling consists, from bottom to top, of a water tank a8, a circulating water pump b9, a secondary air inlet 10, an indirect evaporative cooler 11, a water distributor a12, a water baffle a13, and a secondary air exhaust fan 14. The indirect evaporative cooler 11 is a plate-type indirect evaporative cooler, made of materials such as inorganic polymers, aluminum foil, and fiberglass, depending on the application. The water distributor a12 and the secondary air system are arranged in a counter-flow arrangement. The circulating water pump b9 is located between the passageway connecting the water tank a7 and the water distributor a12.

[0045] The third circulating water system for direct evaporative cooling consists, from bottom to top, of a water tank b16, a circulating water pump c15, packing 17, and a water distributor b18. Packing 17 can be made from inorganic polymers, aluminum foil, fiberglass, and other materials, depending on the application. Depending on resistance requirements, packing 17 can be arranged in layers to optimize air and water distribution, reduce air resistance, and save on unit investment. The circulating water pump c15 is located between the passageway connecting the water tank b16 and the water distributor b18.

[0046] The water baffle a13 and the water baffle b19 adopt corrugated water baffles to prevent water droplets and water mist from being sucked into the fan.

[0047] The utility model combines the three-stage evaporative cooling air-conditioning unit of radiation cooling with the invention, and can select to open the radiation cooling mode, the radiation cooling + indirect evaporative cooling mode, and the radiation cooling + indirect + direct evaporative cooling mode according to indoor and outdoor requirements.

[0048] Radiant Cooling Mode: During winter, when outdoor temperatures are low or other suitable indoor and outdoor conditions are met, the radiant cooling primary water circulation system is activated, while the indirect evaporative cooling secondary water circulation system and the direct evaporative cooling tertiary water circulation system are deactivated. Hot return air from the data center enters the unit casing 21 as primary air, is cooled by the radiant cooling chilled water coil, and then is delivered indoors.

[0049] In the radiant cooling mode, the hot return air from the data center enters the unit's primary air inlet 1 through the guide grille as primary air, is filtered by the filter 2, and is sent to the radiant cooling cold water coil 3 for isohumidification cooling before being sent into the room by the primary air blower 20 to absorb the indoor heat load.

[0050] In the radiant cooling primary water circulation system, the cold water in the radiant cooling water coil 3 absorbs heat from the primary air, flows through pipes into multiple radiant cooling plate assemblies 5 connected in series, where it is cooled. It then flows through pipes and circulating water pump a6 into the radiant cooling water coil 3 to cool the primary air, continuing the cycle. The radiant cooling plate assemblies 5, a passive cooling technology that uses thermal radiation to transfer heat from an object through a transparent window into the atmosphere, are installed within the unit and utilize almost entirely natural cooling sources for cooling, consuming only a small amount of electrical energy to operate the circulating water pump a.

[0051] Radiant Cooling + Indirect Evaporative Cooling Mode: During winter, transitional seasons, and other suitable outdoor conditions, when outdoor temperatures are low, the radiant cooling primary water circulation system and the indirect evaporative cooling secondary water circulation system are activated, while the direct evaporative cooling tertiary water circulation system is shut down. Hot return air from the data center enters the unit as primary air, is pre-cooled by the radiant cooling chiller coil, and then cooled by indirect evaporative cooling before being delivered indoors.

[0052] In the radiant cooling + indirect evaporative cooling mode, hot return air from the data center enters the unit's primary air inlet 1 through the guide grille. After being filtered by filter 2, it is sent to the radiant cooling water coil 3 for isotropic cooling. It is then further isotropically cooled by the indirect evaporative cooler 11 in the indirect evaporative cooling secondary circulating water system. The primary air is then delivered into the room by the primary air supply fan 20 to absorb the indoor heat load.

[0053] In the radiant cooling circulating water system, the cold water in the radiant cooling water coil 3 absorbs heat from the primary air and flows through the pipelines to the connected radiant cooling panel assemblies 5, where it is cooled. It then flows through the pipelines and circulating water pump a6 into the radiant cooling water coil 3 to cool the primary air, continuing the cycle. In the indirect evaporative cooling second circulating water system, secondary air from the outside enters the unit casing 21 through the secondary air inlet 10 and is delivered to the wet channel of the indirect evaporative cooler 11. There, it undergoes a direct evaporative cooling process, nearly isenthalpic humidification, with the spray water from the water distributor a12. The circulating water in the water tank a8 is delivered to the water distributor a12 by the circulating water pump b9 and its pipelines. Simultaneously, the primary air in the dry channel of the indirect evaporative cooler 11 transfers heat to the secondary air in the wet channel, cooling it and then delivering it to the room via the primary air blower 20. The secondary air, having absorbed the heat from the primary air, passes through the water baffle a13 to remove any water droplets it carries, before being discharged into the atmosphere by the secondary air exhaust fan 14.

[0054] Radiant Cooling + Indirect Cooling + Direct Evaporative Cooling Mode: During transitional seasons, summer conditions with high outdoor temperature and low humidity, or other appropriate indoor and outdoor conditions, the radiant cooling primary water circulation system, indirect evaporative cooling secondary water circulation system, and direct evaporative cooling tertiary water circulation system are simultaneously activated. Hot return air from the data center enters the unit as primary air, is pre-cooled by the radiant cooling chilled water coil, further pre-cooled by indirect evaporative cooling, and then fed into the direct evaporative cooling tertiary water circulation system for cooling before being delivered indoors.

[0055] In the radiant cooling + indirect + direct evaporative cooling mode, hot return air from the data center enters the unit's primary air inlet 1 through the guide grille. After being filtered by filter 2, it is sent to the radiant cooling chilled water coil 3 for isohumidification cooling. It is then further isohumidified by the indirect evaporative cooler 11 in the indirect evaporative cooling second circulating water system before being sent to the direct evaporative cooling section. After being cooled by the direct evaporative cooling third circulating water system through a heat and moisture exchange process with near isenthalpic humidification, it passes through water baffle b19 to remove any accompanying water droplets. The primary air blower 20 then delivers it into the room to absorb the indoor heat load.

[0056] In the first radiant cooling water circulation system, the cold water in the radiant cooling water coil 3 absorbs heat from the primary air and flows through the pipelines into the series-connected radiant cooling panel assembly 5, where it is cooled. It then flows through the pipelines and circulating water pump a6 into the radiant cooling water coil 3 to cool the primary air, continuing the cycle. In the second indirect evaporative cooling water circulation system, secondary air from outside enters the unit casing through the secondary air inlet 10 and is delivered to the wet channel of the indirect evaporative cooler 11. There, it undergoes a direct evaporative cooling process, nearly isenthalpic humidification, with the spray water from the water distributor a12. The circulating water in the water tank a8 is delivered to the water distributor a12 by the circulating water pump b9 and its pipelines. Simultaneously, the primary air in the dry channel of the indirect evaporative cooler 11 transfers heat to the secondary air in the wet channel, cooling it and then delivering it to the direct evaporative cooling stage. The secondary air, having absorbed the heat from the primary air, passes through the water baffle a13 to remove any entrained water droplets before being discharged into the atmosphere by the secondary air exhaust fan 14. In the third circulating water system of direct evaporative cooling, the circulating water in the water tank b16 is sprayed out through the circulating water pump c15 and its pipeline and the water distributor b18, and undergoes heat and moisture exchange with the primary air in the filler 17. After a direct evaporative cooling process of nearly isenthalpic humidification occurs, the circulating water falls into the water tank b16 and is circulated thereby.

[0057] This utility model can flexibly switch between three operating modes according to changes in outdoor climate conditions and other indoor and outdoor conditions, and can operate efficiently under different environmental conditions. The unit can adjust the cooling strategy according to different loads and environmental conditions, improving its adaptability.

[0058] Example 1

[0059] A three-stage evaporative cooling air conditioning unit incorporating radiant cooling comprises a unit housing 21, with a primary air inlet 1 and a primary air supply port 22 respectively provided on two opposing side walls of the unit housing 21. A filter 2, a radiant cooling water coil 3, an indirect evaporative cooling section, a direct evaporative cooling section, a water baffle b19, and a primary air blower 20 are sequentially provided within the unit housing 21 between the primary air inlet 1 and the primary air supply port 22 in the direction of air flow. A secondary air exhaust port 23 is also provided on the top wall of the unit housing 21 corresponding to the indirect evaporative cooling section. A secondary air inlet 10 is also provided on the side wall of the unit housing 21 corresponding to the indirect evaporative cooling section.

[0060] The unit housing 21 further includes a radiation cooling plate unit, which is connected to the radiation cooling water coil 3 to form a closed loop.

[0061] Example 2

[0062] A three-stage evaporative cooling air conditioning unit incorporating radiant cooling comprises a unit housing 21, with a primary air inlet 1 and a primary air supply port 22 respectively provided on two opposing side walls of the unit housing 21. A filter 2, a radiant cooling water coil 3, an indirect evaporative cooling section, a direct evaporative cooling section, a water baffle b19, and a primary air blower 20 are sequentially provided within the unit housing 21 between the primary air inlet 1 and the primary air supply port 22 in the direction of air flow. A secondary air exhaust port 23 is also provided on the top wall of the unit housing 21 corresponding to the indirect evaporative cooling section. A secondary air inlet 10 is also provided on the side wall of the unit housing 21 corresponding to the indirect evaporative cooling section.

[0063] The unit housing 21 further includes a radiation cooling plate unit, which is connected to the radiation cooling water coil 3 to form a closed loop.

[0064] The indirect evaporative cooling section includes, from top to bottom, a secondary air exhaust fan 14, a water baffle a13, a water distributor a12, an indirect evaporative cooler 11, and a water tank a8. The water tank a8 is connected to the water distributor a12 via a first pipe 24.

[0065] A circulating water pump b9 is also provided on the first pipe 24; the secondary air inlet 10 is located on the side wall of the unit casing 21 corresponding to between the indirect evaporative cooler 11 and the water tank a8.

[0066] Example 3

[0067] A three-stage evaporative cooling air conditioning unit incorporating radiant cooling comprises a unit housing 21, with a primary air inlet 1 and a primary air supply port 22 respectively provided on two opposing side walls of the unit housing 21. A filter 2, a radiant cooling water coil 3, an indirect evaporative cooling section, a direct evaporative cooling section, a water baffle b19, and a primary air blower 20 are sequentially provided within the unit housing 21 between the primary air inlet 1 and the primary air supply port 22 in the direction of air flow. A secondary air exhaust port 23 is also provided on the top wall of the unit housing 21 corresponding to the indirect evaporative cooling section. A secondary air inlet 10 is also provided on the side wall of the unit housing 21 corresponding to the indirect evaporative cooling section.

[0068] The unit housing 21 further includes a radiation cooling plate unit, which is connected to the radiation cooling water coil 3 to form a closed loop.

[0069] The indirect evaporative cooling section includes, from top to bottom, a secondary air exhaust fan 14, a water baffle a13, a water distributor a12, an indirect evaporative cooler 11, and a water tank a8. The water tank a8 is connected to the water distributor a12 via a first pipe 24.

[0070] A circulating water pump b9 is also provided on the first pipe 24; the secondary air inlet 10 is located on the side wall of the unit casing 21 corresponding to between the indirect evaporative cooler 11 and the water tank a8.

[0071] The water distributor a12 includes a water distribution pipe a12 - 1 , on which a plurality of nozzles a12 - 2 are provided. The water distribution pipe a12 - 1 is connected to the first pipeline 24 .

[0072] Example 4

[0073] A three-stage evaporative cooling air conditioning unit incorporating radiant cooling comprises a unit housing 21, with a primary air inlet 1 and a primary air supply port 22 respectively provided on two opposing side walls of the unit housing 21. A filter 2, a radiant cooling water coil 3, an indirect evaporative cooling section, a direct evaporative cooling section, a water baffle b19, and a primary air blower 20 are sequentially provided within the unit housing 21 between the primary air inlet 1 and the primary air supply port 22 in the direction of air flow. A secondary air exhaust port 23 is also provided on the top wall of the unit housing 21 corresponding to the indirect evaporative cooling section. A secondary air inlet 10 is also provided on the side wall of the unit housing 21 corresponding to the indirect evaporative cooling section.

[0074] The unit housing 21 further includes a radiation cooling plate unit, which is connected to the radiation cooling water coil 3 to form a closed loop.

[0075] The indirect evaporative cooling section includes, from top to bottom, a secondary air exhaust fan 14, a water baffle a13, a water distributor a12, an indirect evaporative cooler 11, and a water tank a8. The water tank a8 is connected to the water distributor a12 via a first pipe 24.

[0076] A circulating water pump b9 is also provided on the first pipe 24; the secondary air inlet 10 is located on the side wall of the unit casing 21 corresponding to between the indirect evaporative cooler 11 and the water tank a8.

[0077] The water distributor a12 includes a water distribution pipe a12 - 1 , on which a plurality of nozzles a12 - 2 are provided. The water distribution pipe a12 - 1 is connected to the first pipeline 24 .

[0078] The direct evaporative cooling section includes a water distributor b18, a filler 17 and a water tank b16 arranged in sequence from top to bottom. The water tank b16 is connected to the water distributor b18 through a second pipe 25; a circulating water pump c15 is also provided on the second pipe 25.

[0079] The radiant cooling panel unit includes multiple radiant cooling panel assemblies 5 connected in series. The water inlet of the radiant cooling panel assembly 5 at the head end is connected to the water outlet of the radiant cooling water coil 3 through a third pipe 26, and the water outlet of the radiant cooling panel assembly 5 at the end is connected to the water inlet of the radiant cooling water coil 3 through a fourth pipe 27.

[0080] Example 5

[0081] A three-stage evaporative cooling air conditioning unit incorporating radiant cooling comprises a unit housing 21, with a primary air inlet 1 and a primary air supply port 22 respectively provided on two opposing side walls of the unit housing 21. A filter 2, a radiant cooling water coil 3, an indirect evaporative cooling section, a direct evaporative cooling section, a water baffle b19, and a primary air blower 20 are sequentially provided within the unit housing 21 between the primary air inlet 1 and the primary air supply port 22 in the direction of air flow. A secondary air exhaust port 23 is also provided on the top wall of the unit housing 21 corresponding to the indirect evaporative cooling section. A secondary air inlet 10 is also provided on the side wall of the unit housing 21 corresponding to the indirect evaporative cooling section.

[0082] The unit housing 21 further includes a radiation cooling plate unit, which is connected to the radiation cooling water coil 3 to form a closed loop.

[0083] The indirect evaporative cooling section includes, from top to bottom, a secondary air exhaust fan 14, a water baffle a13, a water distributor a12, an indirect evaporative cooler 11, and a water tank a8. The water tank a8 is connected to the water distributor a12 via a first pipe 24.

[0084] A circulating water pump b9 is also provided on the first pipe 24; the secondary air inlet 10 is located on the side wall of the unit casing 21 corresponding to between the indirect evaporative cooler 11 and the water tank a8.

[0085] The water distributor a12 includes a water distribution pipe a12 - 1 , on which a plurality of nozzles a12 - 2 are provided. The water distribution pipe a12 - 1 is connected to the first pipeline 24 .

[0086] The direct evaporative cooling section includes a water distributor b18, a filler 17 and a water tank b16 arranged in sequence from top to bottom. The water tank b16 is connected to the water distributor b18 through a second pipe 25; a circulating water pump c15 is also provided on the second pipe 25.

[0087] The water distributor b18 includes a water distribution pipe b18 - 1 , on which a plurality of nozzles b18 - 2 are provided. The water distribution pipe b18 - 1 is connected to the second pipeline 25 .

[0088] The radiant cooling panel unit includes multiple radiant cooling panel assemblies 5 connected in series. The water inlet of the radiant cooling panel assembly 5 at the head end is connected to the water outlet of the radiant cooling water coil 3 through a third pipe 26, and the water outlet of the radiant cooling panel assembly 5 at the end is connected to the water inlet of the radiant cooling water coil 3 through a fourth pipe 27.

[0089] The third pipe 26 is provided with a valve a4.

[0090] The fourth pipeline 27 is provided with a circulating water pump a6 and a valve b7.

[0091] Example 6

[0092] A three-stage evaporative cooling air conditioning unit incorporating radiant cooling comprises a unit housing 21, with a primary air inlet 1 and a primary air supply port 22 respectively provided on two opposing side walls of the unit housing 21. A filter 2, a radiant cooling water coil 3, an indirect evaporative cooling section, a direct evaporative cooling section, a water baffle b19, and a primary air blower 20 are sequentially provided within the unit housing 21 between the primary air inlet 1 and the primary air supply port 22 in the direction of air flow. A secondary air exhaust port 23 is also provided on the top wall of the unit housing 21 corresponding to the indirect evaporative cooling section. A secondary air inlet 10 is also provided on the side wall of the unit housing 21 corresponding to the indirect evaporative cooling section.

[0093] The unit housing 21 further includes a radiation cooling plate unit, which is connected to the radiation cooling water coil 3 to form a closed loop.

[0094] The indirect evaporative cooling section includes, from top to bottom, a secondary air exhaust fan 14, a water baffle a13, a water distributor a12, an indirect evaporative cooler 11, and a water tank a8. The water tank a8 is connected to the water distributor a12 via a first pipe 24.

[0095] A circulating water pump b9 is also provided on the first pipe 24; the secondary air inlet 10 is located on the side wall of the unit casing 21 corresponding to between the indirect evaporative cooler 11 and the water tank a8.

[0096] The water distributor a12 includes a water distribution pipe a12 - 1 , on which a plurality of nozzles a12 - 2 are provided. The water distribution pipe a12 - 1 is connected to the first pipeline 24 .

[0097] The direct evaporative cooling section includes a water distributor b18, a filler 17 and a water tank b16 arranged in sequence from top to bottom. The water tank b16 is connected to the water distributor b18 through a second pipe 25; a circulating water pump c15 is also provided on the second pipe 25.

[0098] The water distributor b18 includes a water distribution pipe b18 - 1 , on which a plurality of nozzles b18 - 2 are provided. The water distribution pipe b18 - 1 is connected to the second pipeline 25 .

[0099] The radiant cooling panel unit includes multiple radiant cooling panel assemblies 5 connected in series. The water inlet of the radiant cooling panel assembly 5 at the head end is connected to the water outlet of the radiant cooling water coil 3 through a third pipe 26, and the water outlet of the radiant cooling panel assembly 5 at the end is connected to the water inlet of the radiant cooling water coil 3 through a fourth pipe 27.

[0100] The third pipe 26 is provided with a valve a4.

[0101] The fourth pipeline 27 is provided with a circulating water pump a6 and a valve b7.

[0102] The primary air inlet 1 of the unit adopts a guide grille air outlet, the secondary air exhaust fan 14 adopts an axial flow fan, and the primary air supply fan 20 adopts a centrifugal fan.

Claims

1. A three-stage evaporative cooling air conditioning unit combined with radiant cooling, characterized in that: The invention comprises a unit shell (21), wherein two opposite side walls of the unit shell (21) are respectively provided with a primary air inlet (1) and a primary air supply port (22); a filter (2), a radiation cooling water coil (3), an indirect evaporative cooling section, a direct evaporative cooling section, a water baffle b (19) and a primary air supply fan (20) are sequentially provided in the unit shell (21) between the primary air inlet (1) and the primary air supply port (22) according to the air flow direction; a secondary air exhaust port (23) is further provided at the top wall of the unit shell (21) corresponding to the indirect evaporative cooling section; and a secondary air inlet (10) is further provided at the side wall of the unit shell (21) corresponding to the indirect evaporative cooling section; The unit housing (21) further includes a radiation cooling plate unit, which is connected to the radiation cooling water coil (3) to form a closed loop.

2. The three-stage evaporative cooling air conditioning unit combined with radiant cooling according to claim 1, characterized in that: The indirect evaporative cooling section includes a secondary air exhaust fan (14), a water baffle a (13), a water distributor a (12), an indirect evaporative cooler (11), and a water tank a (8) arranged in sequence from top to bottom. The water tank a (8) is connected to the water distributor a (12) through a first pipe (24). A circulating water pump b (9) is also provided on the first pipe (24); the secondary air inlet (10) is located on the side wall of the unit casing (21) corresponding to the indirect evaporative cooler (11) and the water tank a (8).

3. The three-stage evaporative cooling air conditioning unit combined with radiant cooling according to claim 2, characterized in that: The water distributor a (12) includes a water distribution pipe a (12-1), a plurality of nozzles a (12-2) are provided on the water distribution pipe a (12-1), and the water distribution pipe a (12-1) is connected to the first pipeline (24).

4. The three-stage evaporative cooling air conditioning unit combined with radiant cooling according to claim 1, characterized in that: The direct evaporative cooling section includes a water distributor b (18), a filler (17), and a water tank b (16) arranged in sequence from top to bottom. The water tank b (16) is connected to the water distributor b (18) via a second pipe (25). A circulating water pump c (15) is also provided on the second pipe (25).

5. The three-stage evaporative cooling air conditioning unit combined with radiant cooling according to claim 4, characterized in that: The water distributor b (18) includes a water distribution pipe b (18-1), a plurality of nozzles b (18-2) are provided on the water distribution pipe b (18-1), and the water distribution pipe b (18-1) is connected to the second pipeline (25).

6. The three-stage evaporative cooling air conditioning unit combined with radiant cooling according to claim 1, characterized in that: The radiation cooling plate unit comprises a plurality of radiation cooling plate assemblies (5) connected in series, wherein the water inlet of the radiation cooling plate assembly (5) at the head end is connected to the water outlet of the radiation cooling water coil (3) via a third pipe (26), and the water outlet of the radiation cooling plate assembly (5) at the tail end is connected to the water inlet of the radiation cooling water coil (3) via a fourth pipe (27).

7. The three-stage evaporative cooling air conditioning unit combined with radiant cooling according to claim 6, characterized in that: The radiation cooling plate assembly (5) comprises a cooling plate (5-1), one side outer surface of which is coated with a radiation cooling coating layer (5-3); a cooling coil (5-2) is embedded in the cooling plate (5-1), and the cooling coils (5-2) of two adjacent radiation cooling plate assemblies (5) are interconnected. The water inlet of the cooling coil (5-2) of the radiation cooling plate assembly (5) at the head end is connected to the water outlet of the radiation cooling cold water coil (3) through a third pipe (26), and the water outlet of the cooling coil (5-2) of the radiation cooling plate assembly (5) at the tail end is connected to the water inlet of the radiation cooling cold water coil (3) through a fourth pipe (27).

8. The three-stage evaporative cooling air conditioning unit combined with radiant cooling according to claim 6, characterized in that: The third pipeline (26) is provided with a valve a (4).

9. The three-stage evaporative cooling air conditioning unit combined with radiant cooling according to claim 6, characterized in that: The fourth pipeline (27) is provided with a circulating water pump a (6) and a valve b (7).

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