Air conditioning cooling system

Abstract

The application discloses an air conditioning cooling system which comprises an indirect evaporative cooling device and a liquid cooling device. The indirect evaporative cooling device comprises an indirect heat exchange unit, a spraying assembly, a supply fan and an exhaust fan. The indirect heat exchange unit has a primary air channel and a secondary air channel which are independently arranged and cross each other, and is used for heat exchange between indoor hot air and outdoor cold air. The spraying assembly is used for spraying cooling liquid to the indirect heat exchange unit. The supply fan is used for conveying the indoor cold air after heat exchange to a machine room. The exhaust fan is used for discharging the outdoor hot air after heat exchange to the outside. The heat dissipation of the liquid cooling device is arranged on the primary air channel and is used for heat exchange with outdoor air to obtain cooling working medium. The liquid cooling device is used for cooling a liquid cooling server, and the indirect evaporative cooling device is used for constant humidity cooling treatment of the machine room environment. The whole system has high energy efficiency, simple structure, low cost and wide adaptability.

Description

Technical Field

[0001] This application relates to the field of air conditioning and cooling technology for computer rooms, specifically to an air conditioning and cooling system that combines a liquid cooling device and an indirect evaporative cooling device. Background Technology

[0002] Currently, server cooling can be achieved not only by using indirect evaporative cooling units or liquid cooling devices alone, but also by combining indirect evaporative cooling units with liquid cooling devices. However, existing solutions that combine liquid cooling devices with different cooling systems to cool server racks are complex, space-consuming, and costly.

[0003] For example, there is an existing air conditioning cooling system for data centers based on a combination of liquid cooling and evaporative cooling technologies. On the one hand, it uses an indirect evaporative cooling unit to cool the air inside the computer room, and on the other hand, it directly provides cooling water to cool the servers through an evaporative cooler. The two are independent, occupy a large space, and have high costs. Summary of the Invention

[0004] In order to overcome the problems existing in the prior art, the main objective of this application is to provide an air conditioning cooling system that is simple in structure, occupies little space, and is low in cost.

[0005] To achieve the above objectives, this application specifically adopts the following technical solution: This application provides an air conditioning cooling system, which includes an indirect evaporative cooling device and a liquid cooling device, wherein the indirect evaporative cooling device includes: The indirect heat exchange unit has independent and cross-arranged primary and secondary air channels for heat exchange between indoor hot air and outdoor cold air. A spray assembly for spraying coolant onto the indirect heat exchange unit; A supply fan is installed on the secondary air duct to deliver the heat-exchanged indoor cold air to the machine room. An exhaust fan is installed on the primary air duct to exhaust the heat-exchanged outdoor hot air to the outside. The heat dissipation part of the liquid cooling device is located on the primary air channel and is used to exchange heat with the outdoor air to obtain a cooling medium. The cooling medium is used to provide a cold source to the liquid-cooled server.

[0006] In one specific embodiment, the indirect evaporative cooling device further includes an evaporative heat exchanger and a condenser heat exchanger; The condenser heat exchanger is located at the air outlet of the primary air channel, and the evaporator heat exchanger is located at the air outlet of the secondary air channel.

[0007] In one specific embodiment, the spray assembly includes a water collection tank, a spray component, and a first circulation pump. The spray component is disposed above the indirect heat exchange unit and is used to spray coolant onto the primary air channel. The water collection tank is disposed below the indirect heat exchange unit and is connected to the spray component via a pipeline. The first circulation pump is disposed on the pipeline.

[0008] In one specific embodiment, the spray assembly further includes a first filter, which is disposed on the pipeline at the outlet end of the first circulation pump.

[0009] In one specific embodiment, the spray assembly further includes a first valve, which is disposed on the pipeline at the liquid inlet end of the spray component.

[0010] In one specific embodiment, the liquid cooling device includes a CDU cooling module and a heat dissipation component. The CDU cooling module is used to cool the liquid-cooled server, and the heat dissipation component is the spray component. The water collection tank is connected to the spray component via the CDU cooling module.

[0011] In one specific embodiment, the pipeline includes a first pipeline, a second pipeline, and a third pipeline. The water collection tank is connected to the inlet of the CDU cooling module via the first pipeline. The outlet of the CDU cooling module is connected to the spray component via the second pipeline. The two ends of the third pipeline are respectively connected to the first pipeline and the second pipeline. The first circulation pump is located on the first pipeline between the water collection tank and the third pipeline.

[0012] In one specific embodiment, the spray assembly further includes a second filter disposed in the third pipeline.

[0013] In one specific embodiment, the spray assembly further includes a second valve and a third valve. The second valve is disposed on the first pipeline between the inlet of the CDU cooling module and the third pipeline, and is used to control the on / off state of the inlet pipeline of the CDU cooling module. The third valve is disposed on the third pipeline and is used to control the on / off state of the third pipeline.

[0014] In one specific embodiment, the spraying component is disposed above the indirect heat exchange unit, and the water collection tank is disposed below the indirect heat exchange unit; The liquid cooling device includes a CDU cooling module, a packing unit, a water collection device, a second circulation pump, and a heat dissipation section. The heat dissipation section is configured as a jetting device. The packing unit and the indirect heat exchange unit are arranged side by side. The jetting device is located above the packing unit, and the water collection device is located below the packing unit. The water collection device is connected to the inlet of the CDU cooling module via a pipeline, and the outlet of the CDU cooling module is connected to the jetting device via a pipeline. The second circulation pump is located on the pipeline between the water collection device and the inlet of the CDU cooling module.

[0015] In one specific embodiment, the liquid cooling device further includes a fourth valve, which is disposed on the pipeline at the liquid inlet end of the jetting device.

[0016] In one specific embodiment, the liquid cooling device further includes a third filter, which is disposed on the pipeline at the outlet end of the second circulation pump.

[0017] In one specific embodiment, the liquid cooling device includes a CDU cooling module, a third circulation pump, and the heat dissipation section. The heat dissipation section is configured as a dry-cooling heat exchanger, which is located at the outlet of the primary air channel of the indirect heat exchange unit. The outlet of the dry-cooling heat exchanger is connected to the inlet of the CDU cooling module via a pipeline, and the outlet of the CDU cooling module is connected to the inlet of the dry-cooling heat exchanger via a pipeline. The third circulation pump is located on the pipeline between the dry-cooling heat exchanger and the CDU cooling module.

[0018] In one specific embodiment, the liquid cooling device further includes a fourth filter, which is disposed on the pipeline at the inlet of the CDU cooling module.

[0019] Compared to existing technologies, the air conditioning cooling system of this application includes an indirect evaporative cooling device and a liquid cooling device. The indirect evaporative cooling device includes an indirect heat exchange unit, a spray assembly, a supply fan, and an exhaust fan. The indirect heat exchange unit has independent and cross-arranged primary and secondary air channels for heat exchange between indoor hot air and outdoor cold air. The spray assembly sprays coolant onto the indirect heat exchange unit. The supply fan is located on the secondary air channel and delivers the heat-exchanged indoor cold air to the computer room for constant humidity cooling of the computer room environment. The fan is installed on the primary air channel to exhaust the heated outdoor air after heat exchange. The heat dissipation of the liquid cooling device is also located on the primary air channel to exchange heat with the outdoor air to obtain a cooling medium. This cooling medium is used to provide a cold source for the liquid-cooled server. In this application, the heat dissipation part of the liquid cooling device is located on the primary air channel to obtain a cooling medium for the CDU cooling module, thereby cooling the liquid-cooled server. The indirect evaporative cooling device is used to perform constant humidity cooling treatment on the computer room environment. The whole system has high energy efficiency, a relatively simple structure, low cost, and wide adaptability. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of an air conditioning cooling system provided in an embodiment of this application.

[0021] Figure 2 This is a schematic diagram of an air conditioning cooling system provided in another embodiment of this application.

[0022] Figure 3 for Figure 2 Another perspective structural diagram of the air conditioning cooling system in the image.

[0023] Figure 4 This is a schematic diagram of the structure of an air conditioning cooling system provided in another embodiment of this application.

[0024] Attached image labels: 1. Indirect heat exchange unit; 2. Evaporative heat exchanger; 3. Condensing heat exchanger; 4. Air supply fan; 5. Exhaust fan; 6. Spray assembly; 61. Water collection tank; 62. Spray component; 63. First circulation pump; 64. First filter; 65. Second filter; 66. First valve; 67. Second valve; 68. Third valve; 601. First pipeline; 602. Second pipeline; 603. Third pipeline; 7. Liquid cooling device; 71. CDU cooling module; 72. Packing unit; 73. Water collection device; 74. Spray device; 75. Second circulation pump; 76. Fourth valve; 77. Third filter; 78. Dry cooling heat exchanger; 79. Third circulation pump; 70. Fourth filter; 100. Indirect evaporative cooling device; 200. Liquid-cooled server rack. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0026] In the description of this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; unless otherwise specified or explained, the term "multiple" refers to two or more; the terms "connected," "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0027] In the description of this specification, it should be understood that the directional terms such as "upper" and "lower" used in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should also be understood that when it is mentioned that an element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.

[0028] Existing cooling systems that combine liquid cooling devices with evaporative cooling technology, or other air conditioning systems that combine liquid cooling devices, typically suffer from the following problems: 1. Liquid cooling and evaporative cooling are actually independent of each other. The system is not simple enough, making the whole system more complex, occupying a large space and costing more.

[0029] 2. Existing heat pipe air conditioners or direct evaporation condensers and cooling towers need to be assembled on-site, which takes up a large area and has high construction costs.

[0030] 3. Using a direct evaporator condenser, with direct spraying or misting onto the heat exchanger surface, easily leads to scaling and corrosion. On the one hand, scaling affects heat exchange performance; on the other hand, corrosion not only shortens the equipment's service life, but also compromises the safety of the computer room in the event of a leak, resulting in poor safety and stability.

[0031] 4. High water consumption rate: Existing cooling tower liquid cooling devices have a high water drift rate, while direct evaporation coolers require a low concentration ratio, otherwise the cooler is prone to scaling and corrosion.

[0032] 5. High maintenance rate: Direct evaporation condensers are prone to clogging when using high-pressure spray, resulting in high maintenance frequency and high failure rate.

[0033] 6. It has high requirements for water quality. Direct spraying or sprinkling onto the evaporative cooler can easily cause scaling and corrosion.

[0034] Reference Figure 1 As shown, Figure 1 This is a schematic diagram of the air conditioning cooling system provided in an embodiment of this application. The air conditioning cooling system includes an indirect evaporative cooling device and a liquid cooling device. The indirect evaporative cooling device 100 includes an indirect heat exchange unit 1, a supply fan 4, an exhaust fan 5, and a spray assembly 6. The indirect heat exchange unit 1 has independent and cross-arranged primary and secondary air channels for heat exchange between indoor hot air and outdoor cold air. The spray assembly 6 sprays coolant onto the indirect heat exchange unit 1. The supply fan 4 is located on the secondary air channel of the indirect heat exchange unit 1 and is used to deliver the heat-exchanged indoor cold air to the computer room for constant humidity cooling. The exhaust fan 5 is located on the primary air channel of the indirect heat exchange unit 1 and is used to exhaust the heat-exchanged outdoor hot air outdoors. The heat dissipation portion of the liquid cooling device 7 is located on the primary air channel of the indirect heat exchange unit 1 and is used to exchange heat with outdoor air to obtain a cooling medium. This cooling medium is used to provide a cooling source for the liquid-cooled servers in the liquid-cooled server rack 200.

[0035] In this embodiment, the supply fan 4 is disposed at the outlet of the secondary air passage of the indirect heat exchange unit 1, and the exhaust fan 5 is disposed at the outlet of the primary air passage of the indirect heat exchange unit 1. It can be understood that in other embodiments, the supply fan 4 may also be disposed at the inlet of the secondary air passage of the indirect heat exchange unit 1 or within the secondary air passage, and the exhaust fan 5 may be disposed at the inlet of the primary air passage of the indirect heat exchange unit 1 or within the primary air passage.

[0036] Specifically, the indirect evaporative cooling device 100 also includes an evaporative heat exchanger 2 and a condenser heat exchanger 3. The air inlet of the primary air passage is located at the bottom of the indirect heat exchange unit 1, and the air outlet of the primary air passage is located at the top of the indirect heat exchange unit 1. The air inlet and outlet of the secondary air passage are located on opposite sides of the indirect heat exchange unit 1, respectively. The evaporative heat exchanger 2 is located at the air outlet of the secondary air passage, and a blower 4 is connected to the air outlet of the evaporative heat exchanger 2. The condenser heat exchanger 3 is located at the air outlet of the primary air passage, and an exhaust fan 5 is connected to the air outlet of the condenser heat exchanger 3.

[0037] During heat exchange, cold outdoor air flows into the primary air channel through the air inlet, while hot indoor air flows into the secondary air channel through the air inlet. This allows the cold outdoor air and hot indoor air to exchange heat within the indirect heat exchange unit 1, resulting in a decrease in the temperature of the hot indoor air and an increase in the temperature of the cold outdoor air. While the cold outdoor air and hot indoor air are exchanging heat within the indirect heat exchange unit 1, the spray assembly 6 also sprays coolant onto the indirect heat exchange unit 1 to continuously humidify and cool the outdoor air. This further reduces the temperature of the hot indoor air after heat exchange, providing cool air to the computer room and lowering the overall air temperature. If the temperature of the indoor air after preliminary heat exchange in indirect heat exchange unit 1 still does not meet the temperature requirements of the computer room, the indoor air after preliminary heat exchange in indirect heat exchange unit 1 enters evaporative heat exchanger 2, and the outdoor air after preliminary heat exchange in indirect heat exchange unit 1 enters condensing heat exchanger 3. In condensing heat exchanger 3, the outdoor air exchanges heat with the heat exchange medium, and the outdoor air temperature further increases. It is then discharged outdoors by exhaust fan 5. The temperature of the heat exchange medium decreases and in evaporative heat exchanger 2, the indoor air exchanges heat with the heat exchange medium, and the temperature of the heat exchange medium increases. The indoor air temperature further decreases, so that the indoor air temperature meets the requirements of the computer room, and is then transported into the computer room by supply fan 4.

[0038] The spray assembly 6 includes a water collection tank 61, a spray component 62, and a first circulation pump 63. The spray component 62 is positioned above the indirect heat exchange unit 1 and between the indirect heat exchange unit 1 and the condenser heat exchanger 3, and is used to spray coolant into the primary air passage. The water collection tank 61 is positioned below the indirect heat exchange unit 1 and collects the coolant sprayed by the spray component 62. The water collection tank 61 is connected to the spray component 62 via a pipeline, and the first circulation pump 63 is located on the pipeline.

[0039] Furthermore, the liquid cooling device 7 includes a CDU cooling module 71 and a heat dissipation component. The CDU cooling module 71 is used to cool the liquid-cooled servers in the liquid-cooled server rack 200, and the heat dissipation component is a spray nozzle 62, meaning that the heat dissipation components of the liquid cooling device 7 share the spray nozzle 62. The water collection tank 61 is connected to the spray nozzle 62 via the CDU cooling module 71. Here, CDU refers to a liquid cooling distribution device, which integrates equipment such as a water pump, a constant pressure tank, and a heat exchanger. On one hand, it provides power for the liquid to circulate within the system; on the other hand, it transfers the heat from the liquid-cooled servers to the outdoor environment through heat exchange via the heat exchanger.

[0040] In this embodiment, a portion of the coolant from the indirect evaporative cooling device is directly used for heat exchange with the CDU cooling module 71 to prepare a cooling medium at the required temperature. This cooling medium is then delivered to the liquid-cooled server rack 200 to cool the liquid-cooled server. Simultaneously, most of the coolant is mixed with the return water from the CDU cooling module 71 after heat exchange and evenly sprayed onto the indirect heat exchange unit 1. Outdoor cold air cools the liquid sprayed onto the indirect heat exchange unit 1 to obtain a cooling medium for the CDU cooling module. Furthermore, by exchanging heat between the outdoor cold air and the indoor hot air, the indoor hot air undergoes primary cooling. The indoor air then undergoes secondary cooling via the evaporative heat exchanger 2 to obtain the required indoor cooled air, providing cool air for the computer room. The air conditioning cooling system of this application can both provide a cold source for the liquid-cooled server rack and cool the air environment inside the computer room. It is not only highly energy-efficient but also compact, low-cost, and widely adaptable.

[0041] Furthermore, the spray assembly 6 also includes a first pipe 601, a second pipe 602, a third pipe 603, a first filter 64, a second filter 65, a first valve 66, a second valve 67, and a third valve 68. The water collection tank 61 is connected to the inlet of the CDU cooling module 71 via the first pipe 601. The outlet of the CDU cooling module 71 is connected to the spray component 62 via the second pipe 602. Both ends of the third pipe 603 are connected to the first pipe 601 and the second pipe 602, respectively. A first circulating pump 63 is located on the first pipe 601 between the water collection tank 61 and the third pipe 603. A first valve 66 is located on the pipe at the liquid inlet of the spray component 62 to control the on / off state of the liquid inlet pipe. A second valve 67 is located on the first pipe 601 between the inlet of the CDU cooling module 71 and the third pipe 603 to control the on / off state of the inlet pipe of the CDU cooling module 71. The third valve 68 is installed in the third pipeline 603 and is used to control the opening and closing of the third pipeline 603. The first filter 64 is installed in the pipeline at the outlet of the first circulating pump 63 and is used to filter the cooling water flowing out of the first circulating pump 63. The second filter 65 is installed in the third pipeline 603 and is used to filter the coolant flowing through the third pipeline 603.

[0042] In practice, the low-temperature coolant in the water collection tank 61 flows through the first circulating pump 63, and a portion flows through the second valve 67 and is filtered by the first filter 64 before flowing into the CDU cooling module 71 for indirect heat exchange. The high-temperature coolant after heat exchange flows out of the CDU cooling module 71 and mixes with most of the low-temperature coolant that has flowed through the third valve 68 and the second filter 65 to form a medium-temperature coolant. After the medium-temperature coolant flows through the first valve 66, it is evenly sprayed onto the indirect heat exchange unit 1 by the spray component 62, and directly evaporates and cools the outdoor air to obtain low-temperature coolant, which is then collected back into the water collection tank 61. At the same time, the humidified and cooled outdoor air indirectly exchanges heat with the indoor hot air to obtain primary cooled indoor air. If the primary cooled indoor air does not meet the design air supply conditions, it further exchanges heat with the evaporative heat exchanger 2 to obtain the cooled air under the design conditions, which is then sent to the machine room by the air supply fan 4. The secondary outdoor air, after heat exchange in indirect heat exchange unit 1, continues to exchange heat with condenser heat exchanger 3, providing liquid refrigerant for evaporation heat exchanger 2 to absorb heat through evaporation. The high-temperature outdoor air after heat exchange is discharged to the outside through exhaust fan 5, thus circulating. The air conditioning cooling system of this application, combining the indirect evaporative cooling device with liquid cooling device 7, can provide a cold source for the liquid-cooled server rack 200 and perform constant humidity cooling treatment on the air environment inside the computer room. When liquid cooling device 7 malfunctions, the second valve 67 is closed and the third valve 68 is fully opened, allowing the low-temperature coolant to be sprayed onto indirect heat exchange unit 1. This eliminates some of the impact of the mixture of high-temperature and low-temperature liquid cooling water and the resulting increase in water temperature on indirect heat exchange unit 1, thereby increasing the heat exchange capacity of indirect evaporative cooling.

[0043] In the existing liquid cooling device 7, the supply water temperature is usually about 40°C and the return water temperature is about 45°C. The temperature of the cooling water flowing through the indirect heat exchange unit 1 is close to the local wet-bulb temperature. Therefore, the low-temperature coolant flowing through the indirect heat exchange unit 1 can be used directly to cool the liquid-cooled server through the CDU cooling module 71.

[0044] The air conditioning cooling system in this embodiment eliminates the direct evaporation heat exchanger, cooling fan and circulating pump of the liquid cooling device 7, and has a simple and compact structure, low water consumption, good energy efficiency and wide adaptability.

[0045] Based on the above embodiments, this application also discloses another specific implementation method. The difference between this embodiment and the above embodiments is that, referring to... Figure 2 and Figure 3As shown, in this embodiment, the spray assembly 6 includes a water collection tank 61, a spray component 62, a first circulating pump 63, a first filter 64, and a first valve 66. The spray component 62 is disposed above the indirect heat exchange unit 1, and the water collection tank 61 is disposed below the indirect heat exchange unit 1, with the water collection tank 61 connected to the spray component 62 via a pipeline. The first circulating pump 63 is disposed on the pipeline between the water collection tank 61 and the spray component 62. The first valve 66 is disposed on the pipeline at the liquid inlet end of the spray component 62, and is used to control the opening and closing of the liquid inlet end pipeline of the spray component 62. The first filter 64 is disposed on the pipeline at the liquid outlet end of the first circulating pump 63, and is used to filter the cooling water flowing out through the first circulating pump 63.

[0046] The liquid cooling device 7 includes a CDU cooling module 71, a packing unit 72, a water collecting device 73, a second circulation pump 75, and a heat dissipation section, wherein the heat dissipation section is configured as a jetting device 74. The packing unit 72 is arranged side-by-side with the indirect heat exchange unit 1. The jetting device 74 is positioned above the packing unit 72, and the water collecting device 73 is positioned below the packing unit 72. The water collecting device 73 is connected via a pipeline to the inlet of the CDU cooling module 71, and the outlet of the CDU cooling module 71 is connected via a pipeline to the jetting device 74. The second circulation pump 75 is located on the pipeline between the water collecting device 73 and the outlet of the CDU cooling module 71. Further, the liquid cooling device 7 also includes a fourth valve 76 and a third filter 77. The fourth valve 76 is located on the pipeline at the liquid inlet end of the jetting device 74 and is used to control the opening and closing of the liquid inlet pipeline of the jetting device 74. The third filter 77 is located on the pipeline at the liquid outlet end of the second circulation pump 75 and is used to filter the coolant flowing out of the second circulation pump 75.

[0047] In practice, the first valve 66 and the fourth valve 76 are opened, and the high-temperature return water from the liquid cooling device 7 is evenly sprayed onto the packing unit 72 through the spray device 74, directly evaporating and cooling the outdoor air. The obtained coolant is stored in the water collection device 73 and sent to the CDU cooling module 71 through the second circulation pump 75 for indirect heat exchange with the high-temperature liquid coolant, thereby removing the heat from the liquid-cooled server. At the same time, the coolant stored in the water collection tank 61 is filtered by the first circulation pump 63 and the first filter 64, and sent to the spray device 62, where it is evenly sprayed onto the indirect heat exchange unit 1 to humidify and cool the outdoor air. The humidified and cooled outdoor air then undergoes indirect heat exchange with the indoor hot air in the indirect heat exchange unit 1 to obtain primary indoor cooling air. If the primary indoor cooling air does not meet the design air supply conditions, it further exchanges heat with the evaporative heat exchanger 2 to obtain indoor cooling air under the design conditions, which is then sent to the computer room by the air supply fan 4. The outdoor air, after being heated in the indirect heat exchange unit 1, continues to exchange heat with the condensing heat exchanger 3, providing liquid refrigerant for evaporation and heat absorption in the evaporating heat exchanger 2. The high-temperature outdoor air after heat exchange is then exhausted to the outside through the outdoor exhaust fan 5. This cycle continues, and the air conditioning cooling system of this application combines an indirect evaporative cooling device and a liquid cooling device 7, providing both source cooling for the liquid-cooled server rack and cooling the air inside the computer room.

[0048] Because the circulating cooling water of the liquid cooling device 7 is at a high temperature, its direct spraying onto the indirect heat exchange unit 1 after mixing with the indirect evaporative cooling water may cause a certain reduction in the heat exchange performance of the indirect heat exchange unit 1. This embodiment makes the circulating cooling water system of the liquid cooling device 7 independent from the circulating cooling water system of the indirect evaporative cooling device, while sharing an outdoor exhaust cooling system. This results in a compact system structure and avoids the mixing of the high-temperature cooling water from the CDU cooling module 71 with the cooling water of the indirect evaporative cooling device, thus improving the heat exchange efficiency of the indirect evaporative cooling device. In lower-temperature regions, because the spraying system is independent, the spraying system of the indirect evaporative cooling device can be shut down, reducing the risk of freezing in winter and increasing adaptability.

[0049] Based on the above embodiments, this application also discloses another specific implementation method, referring to... Figure 4As shown, the difference between this embodiment and the previous embodiment is that, in this embodiment, the spray assembly 6 includes a water collection tank 61, a spray component 62, a first circulating pump 63, a first filter 64, and a first valve 66. The spray component 62 is disposed above the indirect heat exchange unit 1, and the water collection tank 61 is disposed below the indirect heat exchange unit 1, and the water collection tank 61 is connected to the spray component 62 via a pipeline. The first circulating pump 63 is disposed on the pipeline between the water collection tank 61 and the spray component 62. The first valve 66 is disposed on the pipeline at the liquid inlet end of the spray component 62, and is used to control the opening and closing of the liquid inlet end pipeline of the spray component 62. The first filter 64 is disposed on the pipeline at the liquid outlet end of the first circulating pump 63, and is used to filter the coolant flowing out through the first circulating pump 63.

[0050] The liquid cooling device 7 includes a CDU cooling module 71, a third circulation pump 79, and a heat dissipation section. The heat dissipation section is a dry-cooling heat exchanger 78, which is located at the outlet of the primary air passage of the indirect heat exchange unit 1. The outlet of the dry-cooling heat exchanger 78 is connected to the inlet of the CDU cooling module 71 via a pipeline, and the outlet of the CDU cooling module 71 is connected to the inlet of the dry-cooling heat exchanger 78 via a pipeline. The third circulation pump 79 is located on the pipeline between the dry-cooling heat exchanger 78 and the CDU cooling module 71.

[0051] Furthermore, the liquid cooling device 7 also includes a fourth filter 70, which is installed on the pipeline at the inlet of the CDU cooling module 71 and is used to filter the cooling water flowing out by the third circulation pump 79.

[0052] In practice, the first valve 66 is opened, and the high-temperature heat exchange medium (which can be Freon, ethylene glycol, water, etc.) in the liquid cooling device 7 flows into the dry cooling heat exchanger 78 to exchange heat with the outdoor air. The resulting low-temperature heat exchange medium is then sent to the CDU cooling module 71 to exchange heat indirectly with the high-temperature liquid coolant, thereby removing heat from the liquid-cooled server. Simultaneously, the coolant stored in the water tank 61 is filtered through the first circulation pump 63 and the first filter 64, and then sent to the spray unit 62 to be evenly sprayed onto the indirect heat exchange unit 1, humidifying and cooling the outdoor air. The humidified and cooled outdoor air then exchanges heat indirectly with the indoor air in the indirect heat exchange unit 1 to obtain primary indoor cooling air. If the primary indoor cooling air does not meet the design air supply conditions, it further exchanges heat with the evaporative heat exchanger 2 to obtain indoor cooling air meeting the design conditions, which is then delivered to the computer room by the air supply fan 4. The secondary outdoor air, after heat exchange in indirect heat exchange unit 1, continues to exchange heat with condenser heat exchanger 3, providing liquid refrigerant for evaporation heat exchanger 2 or dry-cooling heat exchanger 78. The high-temperature outdoor air after heat exchange is discharged to the outside through outdoor exhaust fan 5.

[0053] In this embodiment, after the outdoor air is humidified and cooled by spraying, the secondary outdoor air temperature is close to the local wet-bulb temperature. The existing liquid cooling device 7 has a return water temperature of approximately 45°C and a supply water temperature of approximately 40°C. Therefore, a condensing heat exchanger 3 can be installed above the indirect heat exchange unit 1, while a dry-cooling heat exchanger 78 is also installed. The dry-cooling heat exchanger 78 provides a cold source for the liquid-cooled server, avoiding the decrease in efficiency of indirect evaporative heat exchange. Since this liquid cooling device 7 is a completely closed system, its operational safety and stability are higher. In low-temperature regions, after the spraying stops in winter, outdoor dry air can be used directly for cooling, resulting in low freeze risk and wider adaptability.

[0054] This application has the following beneficial effects: 1. Compared with existing liquid cooling devices combined with evaporative cooling systems, this design eliminates the need for a pre-cooling module, a liquid cooling device exhaust fan, and a low-temperature side circulation pump, resulting in a more compact structure and easier integrated design.

[0055] 2. Compared with existing liquid cooling devices combined with evaporative cooling systems, the use of liquid-liquid heat exchange units or phase change heat exchange units results in higher efficiency, smaller size, and less space occupation.

[0056] 3. Compared with existing liquid cooling devices combined with evaporative cooling systems, which have lower requirements for water quality, liquid cooling devices have higher return water temperatures and are easily used for spraying or sprinkling on heat exchangers, which can easily lead to scaling and corrosion.

[0057] 4. Compared with existing liquid cooling devices combined with evaporative cooling systems, it offers higher safety and stability.

[0058] 5. Compared with existing cooling tower cooling water cooling devices and dry cooler spray or spray liquid cooling devices, it eliminates the need for cooling towers, drainage fans, circulating pumps, dry coolers, and engineering connections, greatly reducing construction costs.

[0059] 6. Low water consumption and low drift rate compared to cooling towers. Compared to dry cooler spray or spray liquid cooling devices, and heat exchangers which are in a closed flowing liquid environment, it is less prone to scaling and can use circulating water with a higher concentration ratio.

[0060] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An air conditioning cooling system, characterized in that, It includes an indirect evaporative cooling device and a liquid cooling device, wherein the indirect evaporative cooling device includes: The indirect heat exchange unit has independent and cross-arranged primary and secondary air channels for heat exchange between indoor hot air and outdoor cold air. A spray assembly for spraying coolant onto the indirect heat exchange unit; A supply fan is installed on the secondary air duct to deliver the heat-exchanged indoor cold air to the machine room. An exhaust fan is installed on the primary air duct to exhaust the heat-exchanged outdoor hot air to the outside. The liquid cooling device includes a CDU cooling module and a heat dissipation section. The outlet of the CDU cooling module is connected to the heat dissipation section via a pipeline. The heat dissipation section is located on the primary air channel and is used to exchange heat with outdoor air to obtain a cooling medium. The cooling medium is used to provide a cold source to the liquid-cooled server.

2. The air conditioning cooling system according to claim 1, characterized in that, The indirect evaporative cooling device also includes an evaporative heat exchanger and a condenser heat exchanger; The condenser heat exchanger is located at the air outlet of the primary air channel, and the evaporator heat exchanger is located at the air outlet of the secondary air channel.

3. The air conditioning cooling system according to claim 1, characterized in that, The spray assembly includes a water collection tank, a spray component, and a first circulation pump. The spray component is located above the indirect heat exchange unit and is used to spray coolant into the primary air channel. The water collection tank is located below the indirect heat exchange unit and is connected to the spray component via a pipeline. The first circulation pump is located on the pipeline.

4. The air conditioning cooling system according to claim 3, characterized in that, The spray assembly further includes a first filter, which is disposed on the pipeline at the outlet end of the first circulating pump.

5. The air conditioning cooling system according to claim 3, characterized in that, The spray assembly further includes a first valve, which is disposed on the pipeline at the liquid inlet end of the spray component.

6. The air conditioning cooling system according to any one of claims 3 to 5, characterized in that, The heat dissipation part is the spray component, and the water collection tank is connected to the spray component via the CDU cooling module.

7. The air conditioning cooling system according to claim 6, characterized in that, The pipeline includes a first pipeline, a second pipeline, and a third pipeline. The water collection tank is connected to the inlet of the CDU cooling module via the first pipeline. The outlet of the CDU cooling module is connected to the spray unit via the second pipeline. The two ends of the third pipeline are respectively connected to the first pipeline and the second pipeline. The first circulation pump is located on the first pipeline between the water collection tank and the third pipeline.

8. The air conditioning cooling system according to claim 7, characterized in that, The spray assembly also includes a second filter, which is disposed in the third pipeline.

9. The air conditioning cooling system according to claim 7, characterized in that, The spray assembly further includes a second valve and a third valve. The second valve is disposed on the first pipeline between the inlet of the CDU cooling module and the third pipeline, and is used to control the on / off state of the inlet pipeline of the CDU cooling module. The third valve is disposed on the third pipeline and is used to control the on / off state of the third pipeline.

10. The air conditioning cooling system according to any one of claims 3 to 5, characterized in that, The spraying component is positioned above the indirect heat exchange unit, and the water collection tank is positioned below the indirect heat exchange unit. The liquid cooling device further includes a packing unit, a water collecting device, and a second circulation pump. The heat dissipation part is a jetting device. The packing unit and the indirect heat exchange unit are arranged side by side. The jetting device is located above the packing unit, and the water collecting device is located below the packing unit. The water collecting device is connected to the inlet of the CDU cooling module via a pipeline, and the outlet of the CDU cooling module is connected to the jetting device via a pipeline. The second circulation pump is located on the pipeline between the water collecting device and the inlet of the CDU cooling module.

11. The air conditioning cooling system according to claim 10, characterized in that, The liquid cooling device also includes a fourth valve, which is located on the pipeline at the liquid inlet end of the jetting device.

12. The air conditioning cooling system according to claim 10, characterized in that, The liquid cooling device also includes a third filter, which is installed on the pipeline at the outlet of the second circulation pump.

13. The air conditioning cooling system according to any one of claims 3 to 5, characterized in that, The liquid cooling device also includes a third circulating pump. The heat dissipation part is a dry cooling heat exchanger. The dry cooling heat exchanger is located at the outlet of the primary air channel of the indirect heat exchange unit, and the outlet of the dry cooling heat exchanger is connected to the inlet of the CDU cooling module via a pipeline. The outlet of the CDU cooling module is connected to the inlet of the dry cooling heat exchanger via a pipeline. The third circulating pump is located on the pipeline between the dry cooling heat exchanger and the CDU cooling module.

14. The air conditioning cooling system according to claim 13, characterized in that, The liquid cooling device also includes a fourth filter, which is installed on the pipeline at the inlet of the CDU cooling module.

Images