Chilled water heat exchange hot air wall

Abstract

The utility model discloses a chilled water heat exchange air wall which comprises an air wall, a first cooling device and a second cooling device, the air wall is provided with an air inlet side and an air outlet side, the air wall comprises a plurality of heat exchange pieces arranged in the direction from the air inlet side to the air outlet side, and the heat exchange pieces at least comprise a first heat exchange piece close to the air inlet side and a second heat exchange piece close to the air outlet side; the first cooling device communicates with the first heat exchange piece through a first pipeline assembly to form a first cooling loop, and chilled water in the first heat exchange piece can circularly flow between the first cooling device and the first heat exchange piece; the second cooling device communicates with the second heat exchange piece through a second pipeline assembly to form a second cooling loop, and chilled water in the second heat exchange piece can circularly flow between the second cooling device and the second heat exchange piece. The first heat exchange piece can precool the air, the temperature difference between the air and chilled water in the second heat exchanger can be reduced, the heat exchange efficiency is improved, and therefore the system energy consumption is reduced.

Description

Technical Field

[0001] This utility model relates to the field of heat dissipation technology, and in particular to a chilled water heat exchanger wall. Background Technology

[0002] Servers in communication equipment rooms generate a significant amount of heat during operation, most of which is sensible heat. This heat needs to be dissipated promptly; otherwise, electronic components will remain at high temperatures for extended periods, shortening the equipment's lifespan and potentially burning out internal electronic components. A cooling wall is a type of cooling system used in communication equipment rooms. It lowers the temperature of the air before introducing it into the room, thus reducing the internal temperature. Chillers are typically used as the cold source.

[0003] In the process of developing this application, the inventors discovered at least the following problems in the prior art:

[0004] The temperature difference between the return air and the chilled water in the heat exchange equipment inside the air wall in the communication equipment room is relatively large, resulting in low heat exchange efficiency. Therefore, it is necessary to increase the flow rate of chilled water and the wind speed of the fan to improve heat exchange efficiency and enhance the cooling effect on the air. However, this will increase the power consumption of the system. Moreover, when the chiller unit fails, the air wall cannot cool the air passing through it, causing the temperature in the communication equipment room to rise continuously, affecting the stable operation and lifespan of the server. Utility Model Content

[0005] In view of this, the present invention provides a chilled water heat exchange air wall to solve the technical problem in the prior art where the large difference between the return air temperature and the chilled water temperature leads to lower heat exchange efficiency and increased power consumption.

[0006] This application provides a chilled water heat exchanger wall, comprising:

[0007] The air wall has an air inlet side and an air outlet side. The air wall includes a plurality of heat exchange elements arranged along the direction from the air inlet side to the air outlet side. The plurality of heat exchange elements includes at least a first heat exchange element near the air inlet side and a second heat exchange element near the air outlet side.

[0008] A first cooling device is connected to the first heat exchanger via a first pipe assembly to form the first cooling circuit, wherein chilled water in the first heat exchanger can circulate between the first cooling device and the first heat exchanger.

[0009] The second cooling device is connected to the second heat exchanger via a second pipe assembly to form the second cooling circuit, wherein chilled water in the second heat exchanger can circulate between the second cooling device and the second heat exchanger.

[0010] In some embodiments, the first cooling device is a cooling tower for exchanging heat with the environment, and the second cooling device is a chiller unit containing refrigerant.

[0011] In some embodiments, the cooling tower is connected to the chiller unit via a third piping assembly to form a third cooling loop, and the chilled water in the cooling tower can circulate between the chiller unit and the cooling tower.

[0012] In some embodiments, the chiller unit includes a housing and an evaporator and a condenser located within the housing, the refrigerant circulates between the evaporator and the condenser, chilled water in the second heat exchanger passes through the evaporator and releases heat, and chilled water in the cooling tower passes through the condenser and absorbs heat.

[0013] In some embodiments, a flow exchange component is provided between the first pipe assembly and the second pipe assembly, the flow exchange component being used to control the first heat exchanger to be connected to the cooling tower or to the chiller unit.

[0014] In some embodiments, the first piping assembly includes a first outlet pipe and a first inlet pipe, the first outlet pipe being connected to the outlet of the first heat exchanger and the first inlet pipe being connected to the inlet of the first heat exchanger.

[0015] The second pipeline assembly includes a second liquid outlet pipe and a second liquid inlet pipe. The second liquid outlet pipe is connected to the outlet of the second heat exchanger, and the second liquid inlet pipe is connected to the inlet of the second heat exchanger.

[0016] The exchange assembly is located between the first liquid outlet pipe and the second liquid outlet pipe, and between the first liquid inlet pipe and the second liquid inlet pipe.

[0017] In some embodiments, the flow exchange assembly includes a first three-way valve disposed on the first outlet pipe, a first connecting pipe connecting the first three-way valve and the second outlet pipe, a second three-way valve disposed on the first inlet pipe, and a second connecting pipe connecting the second three-way valve and the second inlet pipe.

[0018] In some embodiments, a one-way valve is provided on the second outlet pipe, and the one-way valve is located on the side of the first connecting pipe away from the second heat exchanger.

[0019] In some embodiments, there are multiple air walls, and the first heat exchange element of each air wall is connected to the first cooling device through the first pipe assembly. The first pipe assembly is provided with a first water distributor and a first water collector; and / or

[0020] The number of wind walls is multiple, and the second heat exchange element of each wind wall is connected to the second cooling device through the second pipe assembly. The second pipe assembly is provided with a second water distributor and a second water collector.

[0021] In some embodiments, the number of heat exchangers is two, and the two heat exchangers are in contact with each other.

[0022] Compared with the prior art, the chilled water heat exchanger wall provided by this utility model has at least the following beneficial effects:

[0023] By setting up multiple heat exchangers arranged along the air inlet side to the air outlet side, air passes through multiple heat exchangers sequentially as it passes through the air wall. Each heat exchanger can exchange heat with the passing air. The first heat exchanger near the air inlet side initially cools the passing air, creating a pre-cooling effect. The second heat exchanger near the air outlet side further cools the pre-cooled air. Since the air has already been pre-cooled by the first heat exchanger when it flows through the second heat exchanger, the temperature difference between the air passing through the second heat exchanger and the chilled water inside the second heat exchanger is reduced, thereby improving the heat exchange efficiency between the heat exchangers and the air, enhancing the cooling effect of the air wall on the air, and thus reducing the system's power consumption. Moreover, the first heat exchanger is connected to the first cooling device through the first pipe assembly to form a first cooling loop, and the second heat exchanger is connected to the second cooling device through the second pipe assembly to form a second cooling loop. Therefore, when one cooling loop fails, the other cooling loop can still provide a certain cooling effect on the air passing through the air wall. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a chilled water heat exchanger wall provided in one embodiment of the present invention.

[0025] In the diagram: 10. Chilled water heat exchanger wall; 12. Air wall; 14. First cooling device; 16. Second cooling device; 18. Air inlet side; 20. Air outlet side; 22. First heat exchanger; 24. Second heat exchanger; 26. First piping assembly; 28. First cooling circuit; 30. Second piping assembly; 32. Second cooling circuit; 34. Water pump; 36. Third piping assembly; 38. Third cooling circuit; 40. Flow converter assembly; 42. First liquid outlet pipe; 44. First liquid inlet pipe; 46. Second liquid outlet pipe; 48. Second liquid inlet pipe; 50. First three-way valve; 52. First connecting pipe; 54. Second three-way valve; 56. Second connecting pipe; 58. Check valve; 60. First water distributor; 62. First water collector; 64. Second water distributor; 66. Second water collector. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0027] It should be noted that all directional indicators (such as up, down, left, right, front, back, inside, outside, top, bottom, etc.) in the embodiments of this utility model are only used to explain the relative positional relationship between the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0028] It should also be noted that when a component is referred to as "fixed to" or "set on" another component, the component may be directly on the other component or there may be an intervening component present. When a component is referred to as "connected to" another component, it may be directly connected to the other component or there may be an intervening component present.

[0029] like Figure 1 As shown, an embodiment of this utility model provides a chilled water heat exchanger wall 10, which is applied in scenarios such as data centers and communication equipment rooms to reduce the internal temperature of such scenarios, ensure the stable operation of servers in the data center or communication equipment room, and prevent servers from being in a high-temperature environment for a long time, which would affect their normal operation and service life. For ease of description, the following description uses the application of the chilled water heat exchanger wall 10 in a data center as an example.

[0030] The chilled water heat exchanger wall 10 includes a wall 12, a first cooling device 14, and a second cooling device 16. The wall 12 has an air inlet side 18 and an air outlet side 20. Air passes through the wall 12 as it moves from the air inlet side 18 toward the air outlet side 20. The wall 12 exchanges heat with the passing air, creating a cooling effect. The cooled air is then blown out from the air outlet side 20 and delivered to the interior of the data center, thereby reducing the temperature inside the data center. The temperature of the air increases after the wall 12 cools it. The first cooling device 14 and the second cooling device 16 are used to reduce the temperature of the wall 12, ensuring the cooling effect of the wall 12 on the air.

[0031] In this application, the air cooled by the air wall 12 originates from inside the data center. Hot air inside the data center moves to the air inlet side 18 of the air wall 12 under the action of a fan, and flows from the air inlet side 18 towards the air outlet side 20. As the hot air passes through the air wall 12, it exchanges heat with the air wall 12 to form cold air. This cold air is then transported into the data center by the fan to lower the internal temperature. Extracting hot air from the data center, cooling it, and then returning it to the data center, compared to cooling ambient air before transporting it into the data center, not only helps maintain the internal air pressure balance but also prevents dust, bacteria, and other impurities from the outside air from affecting the internal environment of the data center.

[0032] It should be noted that hot air and cold air refer to air with relatively high or low temperatures, and do not limit the specific temperature of the air. The hot air described in this application refers to air discharged from the data center that has not been cooled by the air wall, while the cold air refers to air cooled by the air wall 12.

[0033] Data centers have hot aisles and cold aisles. Hot air inside the data center is extracted through the hot aisles, while cold air, cooled by airflow wall 12, is returned to the data center through the cold aisles. Hot air cannot enter the cold aisles while flowing through the hot aisles, and vice versa, effectively separating the two airflows to prevent interference and optimize airflow, thus reducing system energy consumption. Specifically, airflow wall 12 is located within the hot aisles.

[0034] Understandably, the number of wind walls 12 can be one or more. When there are multiple wind walls 12, the multiple wind walls 12 can provide heat dissipation for the same space or provide heat dissipation for different spaces.

[0035] In one embodiment, the air wall 12 includes at least two heat exchangers arranged along the direction from the air inlet side 18 to the air outlet side 20. Each heat exchanger contains chilled water and exchanges heat with the passing air through the chilled water. Along the direction from the air inlet side 18 to the air outlet side 20, the temperature of the chilled water in the multiple heat exchangers (the temperature before heat exchange with the air) can be the same or gradually decrease. As the air flows from the air inlet side 18 towards the air outlet side 20, it passes through multiple heat exchangers sequentially. Each heat exchanger exchanges heat with the passing air, thus cooling the air multiple times. The heat exchangers closer to the air inlet side 18 pre-cool the air, and the heat exchangers closer to the air outlet side 20 further cool the pre-cooled air to ensure that the reduced air temperature meets the requirements. Compared to using a single heat exchanger to cool the air, having multiple heat exchangers arranged along the airflow direction helps reduce the temperature difference between the chilled water and the air, thereby improving the heat exchange efficiency between the heat exchangers and the air, enhancing the cooling effect of the air wall 12, and reducing the system's power consumption.

[0036] In this embodiment, the heat exchanger is a coil, which has a relatively simple structure, which helps to reduce manufacturing difficulty and cost.

[0037] At least two heat exchangers include a first heat exchanger 22 near the air inlet side 18 and a second heat exchanger 24 near the air outlet side 20. A first cooling device 14 is connected to the first heat exchanger 22 via a first pipe assembly 26 to form a first cooling circuit 28. Chilled water in the first heat exchanger 22 can flow in the first cooling circuit 28. A second cooling device 16 is connected to the second heat exchanger 24 via a second pipe assembly 30 to form a second cooling circuit 32. Chilled water in the second heat exchanger 24 can flow in the second cooling circuit 32. When air passes through the air wall 12, the chilled water in the first heat exchanger 22 first performs preliminary cooling on the passing air, lowering the air temperature to a certain level before it passes through the second heat exchanger 24. The chilled water in the second heat exchanger 24 further cools the air. By using the first heat exchanger 22 and the second heat exchanger 24 to cool the air sequentially, it is beneficial to reduce the temperature difference between the chilled water in the second heat exchanger 24 and the air, thereby improving the heat exchange efficiency. For ease of description, the chilled water in the first heat exchanger 22 is defined as the first chilled water, and the chilled water in the second heat exchanger 24 is defined as the second chilled water.

[0038] The first chilled water can circulate between the first cooling device 14 and the first heat exchanger 22 through the first pipe assembly 26. When the first heat exchanger 22 exchanges heat with the air, the temperature of the first chilled water rises. The first chilled water moves from the first heat exchanger 22 to the first cooling device 14 through the first pipe assembly 26. After being cooled in the first cooling device 14, the first chilled water flows back into the first heat exchanger 22 through the first pipe assembly 26 to continue cooling the air passing through the first heat exchanger 22. Similarly, the second chilled water can circulate between the second cooling device 16 and the second heat exchanger 24 through the second pipe assembly 30. When the second heat exchanger 24 exchanges heat with the air, the temperature of the second chilled water rises. The second chilled water moves from the second heat exchanger 24 to the second cooling device 16 through the second pipe assembly 30. After being cooled in the second cooling device 16, the second chilled water flows back into the second heat exchanger 24 through the second pipe assembly 30 to continue cooling the air passing through the second heat exchanger 24. The first and second chilled water are used to cool the air passing through the air wall 12, while the first cooling device 14 and the second cooling device 16 cool the first and second chilled water after heat exchange, ensuring the heat exchange effect between the first and second chilled water and the air at the air wall. Moreover, when one of the cooling circuits fails and the heat exchange component of that cooling circuit loses its heat exchange effect, the other cooling circuit can still work normally and continue to cool the air passing through the air wall 12. This can still provide a certain cooling effect for the data center and reduce the impact of failure on the stable operation of servers in the data center.

[0039] Water pumps 34 are respectively provided on the first pipe assembly 26 and the second pipe assembly 30. The water pump 34 on the first pipe assembly 26 is used to provide power for the first chilled water, so that the first chilled water circulates between the first cooling device 14 and the first heat exchanger 22. The water pump 34 on the second pipe assembly 30 is used to provide power for the second chilled water, so that the second chilled water circulates between the second cooling device 16 and the second heat exchanger 24.

[0040] The specific number of heat exchangers is not limited; for example, it can be two, three, or more. In this embodiment, there are two heat exchangers. The heat exchanger closer to the air inlet side 18 is connected to the first cooling device 14, and the heat exchanger closer to the air outlet side 20 is connected to the second cooling device 16. Providing two heat exchangers within the air wall 12 achieves the effect of reducing the temperature difference while also taking into account the overall volume of the air wall 12, avoiding an excessively large volume due to an excessive number of heat exchangers.

[0041] Preferably, the two heat exchange components of the air wall 12 are attached together, that is, the second heat exchange component 24 is attached to the side of the first heat exchange component 22 away from the air inlet side 18. Attaching the two heat exchange components together can improve compactness and reduce the volume of the air wall 12.

[0042] In one embodiment, the first cooling device 14 is a cooling tower, which is used for heat exchange with the environment. That is, after the first chilled water flows to the cooling tower, it exchanges heat with the external environment through the cooling tower to reduce the temperature of the first chilled water. The second cooling device 16 is a chiller unit containing refrigerant. After the second chilled water flows from the second heat exchange element 24 to the chiller unit, the chiller unit exchanges heat with the second chilled water through refrigerant to reduce the temperature of the second chilled water. Cooling towers exchange heat with the external environment. Their power consumption is lower than that of chillers, but their heat exchange efficiency is also lower. Since the first heat exchanger 22 provides a preliminary pre-cooling effect on the air, its cooling effect on the air can be worse than that of the second heat exchanger 24. The temperature of the first chilled water can be higher than that of the second chilled water. Therefore, a cooling tower with relatively lower heat exchange efficiency but lower power consumption can be connected to the first heat exchanger 22 to lower the temperature of the first chilled water through heat exchange with the external environment. This ensures the cooling effect of the air wall 12 on the air and makes full use of natural cold sources to reduce the energy consumption of the chilled water heat exchange air wall 10.

[0043] The cooling tower is connected to the chiller unit via a third piping assembly 36 to form a third cooling loop 38, allowing the chilled water in the cooling tower to circulate between the cooling tower and the chiller unit through the third piping assembly 36. The chilled water in the cooling tower is defined as the third chilled water. When the refrigerant in the chiller unit exchanges heat with the second chilled water, the temperature of the second chilled water decreases, and the temperature of the refrigerant increases. The third chilled water in the cooling tower flows to the chiller unit through the third piping assembly 36 and exchanges heat with the refrigerant in the chiller unit, causing the refrigerant temperature to decrease. The third chilled water temperature increases and flows back to the cooling tower, utilizing the cooling tower to exchange heat with the external environment to lower the temperature of the third chilled water. The chilled water in the cooling tower cools the refrigerant in the chiller unit, lowering its temperature and ensuring effective heat exchange between the refrigerant and the second chilled water.

[0044] Specifically, the third piping assembly 36 is also equipped with a water pump 34, which is used to provide power to the third chilled water so that the third chilled water can circulate between the cooling tower and the chiller unit through the third piping assembly 36.

[0045] In one embodiment, the chiller unit includes a casing and an evaporator and a condenser located within the casing. The evaporator and condenser are interconnected, and the refrigerant can circulate between them. Chilled water in the second heat exchanger 24 passes through the evaporator and releases heat; that is, when the second chilled water passes through the evaporator, the refrigerant in the evaporator absorbs the heat from the second chilled water, causing the temperature of the second chilled water to decrease before flowing back into the second heat exchanger 24. The refrigerant, after its temperature increases, flows from the evaporator into the condenser. Chilled water in the cooling tower passes through the condenser and absorbs heat; that is, when the third chilled water passes through the condenser, the third chilled water absorbs the heat from the chilled water located in the condenser, causing the temperature of the refrigerant to decrease before flowing back into the evaporator. The third chilled water, after its temperature increases, flows back into the cooling tower, where it exchanges heat with the outside air.

[0046] Understandably, the casing can be a double-layered structure, forming two independent spaces, or it can be divided into two independent spaces by a partition inside the casing, as long as the second and third chilled water do not come into contact with each other. The evaporator and condenser are housed in their respective spaces. The second chilled water flows into the space housing the evaporator, passes over the surface of the evaporator, and exchanges heat with the refrigerant inside the evaporator. The third chilled water flows into the space housing the condenser, passes over the surface of the condenser, and exchanges heat with the refrigerant inside the condenser.

[0047] The chiller unit also includes a compressor and an expansion valve. The compressor outlet is connected to the condenser inlet via a pipe, the condenser outlet is connected to the evaporator inlet via a pipe, and the evaporator outlet is connected to the compressor inlet via a pipe, allowing the refrigerant to circulate among the compressor, condenser, and evaporator. The expansion valve is installed on the pipe and located between the condenser and evaporator. The compressor compresses the refrigerant, forming a high-temperature, high-pressure gas. This high-temperature, high-pressure gas releases heat upon reaching the condenser, forming a medium-temperature, high-pressure liquid. This medium-temperature, high-pressure liquid is then throttled by the expansion valve, becoming a low-temperature, low-pressure liquid, which flows into the evaporator. The low-temperature, low-pressure liquid absorbs heat in the evaporator, thus providing a cooling effect to the secondary chilled water.

[0048] It is understandable that the compressor and expansion valve can be externally located in the chiller unit. In this case, the chiller unit does not include the compressor and expansion valve.

[0049] In one embodiment, a converter assembly 40 is provided between the first pipe assembly 26 and the second pipe assembly 30. The converter assembly 40 is used to control the connection between the first heat exchanger 22 and the cooling tower or the chiller unit. When the ambient temperature is too high to cool the first chilled water, for example, when the ambient temperature is higher than the temperature inside the data center, the converter assembly 40 can connect the first heat exchanger 22 to the chiller unit. The first chilled water in the first heat exchanger 22 exchanges heat with the air and then flows into the chiller unit. The refrigerant in the chiller unit cools the first chilled water, preventing the first heat exchanger 22 from losing its pre-cooling effect on the air due to the high ambient temperature. When the ambient temperature is sufficient to cool the first chilled water, for example, when the ambient temperature is lower than the temperature inside the data center, the converter assembly 40 can connect the first heat exchanger 22 to the cooling tower. The first chilled water flows into the cooling tower and exchanges heat with the ambient environment. This allows the first heat exchanger 22 to selectively connect to the cooling tower or the chiller unit according to the actual situation, making full use of the natural cold source while satisfying the pre-cooling function.

[0050] The first piping assembly 26 includes a first outlet pipe 42 and a first inlet pipe 44. The first outlet pipe 42 is connected to the outlet of the first heat exchanger 22, and the first inlet pipe 44 is connected to the inlet of the first heat exchanger 22. After the chilled water in the first heat exchanger 22 exchanges heat with the air, it first flows into the first outlet pipe 42 through the outlet, then enters the cooling tower along the first outlet pipe 42, is cooled by the cooling tower, and then flows into the first inlet pipe 44. Finally, it flows back into the first heat exchanger 22 from the first inlet pipe 44 through the inlet.

[0051] The second piping assembly 30 includes a second outlet pipe 46 and a second inlet pipe 48. The second outlet pipe 46 is connected to the outlet of the second heat exchanger 24, and the second inlet pipe 48 is connected to the inlet of the second heat exchanger 24. After the chilled water in the second heat exchanger 24 exchanges heat with the air, it first flows into the second outlet pipe 46 through the outlet, then enters the chiller unit along the second outlet pipe 46, is cooled by the chiller unit, and then flows into the second inlet pipe 48. Finally, it flows back into the second heat exchanger 24 from the second inlet pipe 48 through the inlet.

[0052] The converter assembly 40 is located between the first liquid outlet pipe 42 and the second liquid outlet pipe 46, and between the first liquid inlet pipe 44 and the second liquid inlet pipe 48. The converter assembly 40 can connect the first liquid outlet pipe 42 and the second liquid outlet pipe 46, and the first liquid inlet pipe 44 and the second liquid inlet pipe 48, thereby connecting the first heat exchanger 22 to the chiller unit. Alternatively, the converter assembly 40 can disconnect the first liquid outlet pipe 42 and the second liquid outlet pipe 46, and the first liquid inlet pipe 44 and the second liquid inlet pipe 48, thereby connecting the first heat exchanger 22 to the cooling tower.

[0053] The converter assembly 40 includes a first three-way valve 50, a first connecting pipe 52, a second three-way valve, and a second connecting pipe 56. The first three-way valve 50 is located at the first outlet pipe 42, and the first connecting pipe 52 connects the first three-way valve 50 and the second outlet pipe 46. The second three-way valve 54 is located at the first inlet pipe 44, and the second connecting pipe 56 connects the second three-way valve 54 and the second inlet pipe 48. The three-way valves have three ports: two ports of the first three-way valve 50 are connected to the first heat exchanger 22 and the cooling tower respectively through the first outlet pipe 42, and the other port is connected to the first connecting pipe 52; two ports of the second three-way valve 54 are connected to the first heat exchanger 22 and the cooling tower respectively through the first inlet pipe 44, and the other port is connected to the second connecting pipe 56. When the interface connecting the first three-way valve 50 to the first connecting pipe 52 and the interface connecting the second three-way valve 54 to the second connecting pipe 56 are closed, the first chilled water cannot flow from the first heat exchanger 22 to the chiller unit. At this time, the first heat exchanger 22 is connected to the cooling tower. When the interface connecting the first three-way valve 50 to the cooling tower is closed and the interface connecting it to the first connecting pipe 52 is open, and the interface connecting the second three-way valve 54 to the cooling tower is closed and the interface connecting it to the second connecting pipe 56 is open, the first chilled water cannot flow from the first heat exchanger 22 to the cooling tower. At this time, the first heat exchanger 22 is connected to the chiller unit, and the first chilled water circulates between the first heat exchanger 22 and the chiller unit.

[0054] A one-way valve 58 is installed on the second outlet pipe 46. The one-way valve 58 is located on the side of the first connecting pipe 52 away from the second heat exchanger 24. When the one-way valve 58 is open, the chilled water in the second heat exchanger 24 can flow into the chiller unit through the second outlet pipe 46. When the one-way valve 58 is closed, the chilled water in the second heat exchanger 24 cannot flow into the chiller unit through the second outlet pipe 46. When the ambient temperature is low enough to meet the cooling effect of the air supplied to the data center, the one-way valve 58 can be closed, and all three ports of the first three-way valve 50 and the second three-way valve 54 can be opened. At this time, the chilled water in the first and second heat exchangers can flow into the cooling tower, where it exchanges heat with the external environment, making full use of the natural cold source, reducing the operating time of the chiller unit, and further reducing the energy consumption of the chilled water heat exchanger wall 10.

[0055] In one embodiment, there are multiple air walls 12. The first cooling device 14 is connected to the first heat exchange elements 22 of the multiple air walls 12 through a first pipe assembly 26. The first pipe assembly 26 is equipped with a first water distributor 60 and a first water collector 62. The first water distributor 60 is located near the inlet of the first heat exchange element 22, and the first water collector 62 is located near the outlet of the first heat exchange element 22. The first water collector 62 can collect the chilled water from each of the first heat exchange elements 22 and then transport it to the cooling tower. The first water distributor 60 can evenly distribute the chilled water flowing back from the cooling tower to the first heat exchange elements 22, making the flow distribution more uniform and achieving the effect of pressure equalization.

[0056] Specifically, the first water distributor 60 is located at the first inlet pipe 44. The end of the first inlet pipe 44 near the first heat exchanger 22 forms multiple branches, each branch connected to the inlet of a first heat exchanger 22. Chilled water flowing from the cooling tower to the first heat exchanger 22 is evenly distributed into each first heat exchanger 22 after being distributed by the first water distributor 60. The first water collector 62 is located at the first outlet pipe 42. The end of the first outlet pipe 42 near the first heat exchanger 22 forms multiple branches, each branch connected to the outlet of a first heat exchanger 22. Chilled water flowing from each first heat exchanger 22 to the cooling tower is first collected in the first water collector 62 and then flows into the cooling tower. The arrangement of the first water distributor 60 and the first water collector 62 allows for more uniform flow distribution, achieving a pressure equalization effect, which helps reduce the power consumption of the water pump 34 and extend the service life of the components of the first cooling circuit 28.

[0057] The second cooling device 16 is connected to the second heat exchangers 24 of the multiple air walls 12 via a second pipe assembly 30. The second pipe assembly 30 is equipped with a second water distributor 64 and a second water collector 66. The second water distributor 64 is located near the inlet of the second heat exchanger 24, and the second water collector 66 is located near the outlet of the second heat exchanger 24. The second water collector 66 can collect the chilled water from each of the second heat exchangers 24 and then deliver it to the chiller unit. The second water distributor 64 can evenly distribute the chilled water flowing back from the chiller unit to the second heat exchangers 24, making the flow distribution more uniform and achieving the effect of pressure equalization.

[0058] Specifically, the second water distributor 64 is located on the second inlet pipe 48. The end of the second inlet pipe 48 near the second heat exchanger 24 forms multiple branches, each branch connected to the inlet of a second heat exchanger 24. Chilled water flowing from the chiller unit to the second heat exchanger 24 is evenly distributed into each second heat exchanger 24 after being distributed by the second water distributor 64. The second water collector 66 is located on the second outlet pipe 46. The end of the second outlet pipe 46 near the second heat exchanger 24 forms multiple branches, each branch connected to the outlet of a second heat exchanger 24. Chilled water flowing from each second heat exchanger 24 to the chiller unit is first collected in the second water collector 66 and then flows into the chiller unit. The arrangement of the second water distributor 64 and the second water collector 66 allows for more uniform flow distribution, achieving a pressure equalization effect, which helps reduce the power consumption of the water pump 34 and extend the service life of the components of the second cooling circuit 32.

[0059] During operation, when the outdoor ambient temperature is lower than the air temperature before pre-cooling, the chilled water in the first heat exchanger 22 can flow to the cooling tower by controlling the first three-way valve 50 and the second three-way valve 54. At the cooling tower, it exchanges heat with the external environment and then flows back to the first heat exchanger 22. The chilled water in the second heat exchanger 24 flows to the chiller unit, exchanges heat with the refrigerant in the chiller unit, and then flows back to the second heat exchanger 24. When the outdoor ambient temperature is higher than the air temperature before pre-cooling, the chilled water in the first heat exchanger cannot cool down by exchanging heat with the environment. In this case, it can be cooled by... Controlling the first three-way valve 50 and the second three-way valve 54 allows the chilled water in the first heat exchanger 22 and the second heat exchanger 24 to flow to the chiller unit. After being cooled by the refrigerant in the chiller unit, the chilled water flows back to the second heat exchanger 24. When the outdoor ambient temperature is lower than the air temperature after heat exchange with the second heat exchanger 24, controlling the first three-way valve 50, the second three-way valve 54, and the check valve 58 allows the chilled water in the first heat exchanger 22 and the second heat exchanger 24 to flow to the cooling tower. After heat exchange with the ambient temperature at the cooling tower, the chilled water flows back to the first heat exchanger 22 and the second heat exchanger 24.

[0060] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A chilled water heat exchanger wall, characterized in that, include: The air wall has an air inlet side and an air outlet side. The air wall includes a plurality of heat exchange elements arranged along the direction from the air inlet side to the air outlet side. The plurality of heat exchange elements includes at least a first heat exchange element near the air inlet side and a second heat exchange element near the air outlet side. A first cooling device is connected to the first heat exchanger via a first pipe assembly to form a first cooling circuit, wherein chilled water in the first heat exchanger can circulate between the first cooling device and the first heat exchanger. The second cooling device is connected to the second heat exchanger via a second pipe assembly to form a second cooling circuit, wherein chilled water in the second heat exchanger can circulate between the second cooling device and the second heat exchanger.

2. The chilled water heat exchanger wall according to claim 1, characterized in that, The first cooling device is a cooling tower for exchanging heat with the environment, and the second cooling device is a chiller unit containing refrigerant.

3. The chilled water heat exchanger wall according to claim 2, characterized in that, The cooling tower is connected to the chiller unit via a third piping assembly to form a third cooling loop, and the chilled water in the cooling tower can circulate between the chiller unit and the cooling tower.

4. The chilled water heat exchanger wall according to claim 3, characterized in that, The chiller unit includes a casing and an evaporator and a condenser located within the casing. The refrigerant circulates between the evaporator and the condenser. The chilled water in the second heat exchanger passes through the evaporator and releases heat, while the chilled water in the cooling tower passes through the condenser and absorbs heat.

5. The chilled water heat exchanger wall according to claim 2, characterized in that, A flow exchange component is provided between the first pipe assembly and the second pipe assembly. The flow exchange component is used to control the first heat exchanger to connect with the cooling tower or with the chiller unit.

6. The chilled water heat exchanger wall according to claim 5, characterized in that, The first pipeline assembly includes a first outlet pipe and a first inlet pipe, the first outlet pipe being connected to the outlet of the first heat exchanger and the first inlet pipe being connected to the inlet of the first heat exchanger. The second pipeline assembly includes a second liquid outlet pipe and a second liquid inlet pipe. The second liquid outlet pipe is connected to the outlet of the second heat exchanger, and the second liquid inlet pipe is connected to the inlet of the second heat exchanger. The exchange assembly is located between the first liquid outlet pipe and the second liquid outlet pipe, and between the first liquid inlet pipe and the second liquid inlet pipe.

7. The chilled water heat exchanger wall according to claim 6, characterized in that, The converter assembly includes a first three-way valve disposed on the first outlet pipe, a first connecting pipe connecting the first three-way valve and the second outlet pipe, a second three-way valve disposed on the first inlet pipe, and a second connecting pipe connecting the second three-way valve and the second inlet pipe.

8. The chilled water heat exchanger wall according to claim 7, characterized in that, The second outlet pipe is equipped with a one-way valve, which is located on the side of the first connecting pipe away from the second heat exchanger.

9. The chilled water heat exchanger wall according to any one of claims 1-8, characterized in that, The number of wind walls is multiple, and the first heat exchange element of each wind wall is connected to the first cooling device through the first pipe assembly. The first pipe assembly is provided with a first water distributor and a first water collector; and / or The number of wind walls is multiple, and the second heat exchange element of each wind wall is connected to the second cooling device through the second pipe assembly. The second pipe assembly is provided with a second water distributor and a second water collector.

10. The chilled water heat exchanger wall according to any one of claims 1-8, characterized in that, The number of heat exchangers is two, and the two heat exchangers are in contact with each other.

Images