Data center liquid cooling distribution unit CDU

Abstract

The utility model relates to the technical field of liquid cooling distribution units, in particular to a data center liquid cooling distribution unit (CDU). Comprising a cabinet body, universal wheels are arranged at the bottom of the cabinet body, a plate heat exchanger is arranged in the cabinet body, the plate heat exchanger is connected with a primary side liquid return pipeline, a primary side liquid supply pipeline, a secondary side liquid supply pipeline and a secondary side liquid return pipeline, the primary side liquid return pipeline comprises a first Y-shaped filter, and the two ends of the first Y-shaped filter are further communicated with a primary side standby liquid return pipeline; the secondary side liquid supply pipeline comprises a second Y-shaped filter, and the two ends of the second Y-shaped filter are further communicated with bypass pipelines. The secondary side liquid return pipeline is also provided with a liquid supplementing pipeline; the primary side liquid return pipeline, the primary side liquid supply pipeline and the secondary side liquid return pipeline are all connected with a liquid discharge pipeline, and the liquid discharge pipeline is located at the lowest position in the cabinet body. The primary side liquid return pipeline and the secondary side liquid supply pipeline are both provided with redundant standby pipelines, and it is ensured that when the main pipeline is blocked, the standby pipelines are started to guarantee that equipment does not stop.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid cooling distribution units, in particular to a data center liquid cooling distribution unit CDU. Background Art

[0002] With the continuous development of digitalization, the scale of data centers is also expanding, and the heat generated also needs to be cooled in time, so a data center liquid cooling distribution unit CDU is needed for liquid cooling. The data center liquid cooling distribution unit CDU is a system that enables smaller, more efficient and accurate liquid cooling in rack-level data centers, usually integrating facility water. The data center liquid cooling distribution unit CDU circulates coolant in a closed-loop system within the rack on the secondary (cooling application) side and uses facility water for cooling on the primary (heat dissipation) side. The data center liquid cooling distribution unit CDU includes pumps, water tanks, power supplies, control panels and heat exchangers as key components. Filters, flow meters, pressure sensors and other equipment are also used to manage the operation of the data center liquid cooling distribution unit CDU together with the server racks.

[0003] Existing data center liquid cooling distribution units are prone to pipe blockages on both the primary and secondary sides, resulting in poor flow and impacting CDU efficiency. These blockages typically occur in the primary return line and the secondary supply line. Therefore, it's imperative to adjust the CDU piping to prevent blockages. Utility Model Content

[0004] The problem to be solved is to improve the CDU pipeline to avoid water congestion caused by blockage.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a data center liquid cooling distribution unit CDU, comprising a cabinet body, a universal wheel is provided at the bottom of the cabinet body, a plate heat exchanger is arranged in the cabinet body, the plate heat exchanger is respectively connected to the primary side return liquid pipeline, the primary side supply liquid pipeline, the secondary side supply liquid pipeline and the secondary side return liquid pipeline, the primary side return liquid pipeline comprises a Y-type filter 1, and both ends of the Y-type filter 1 are also connected to the primary side standby return liquid pipeline; the secondary side supply liquid pipeline comprises a Y-type filter 2, and both ends of the Y-type filter 2 are also connected to a bypass pipeline; the secondary side return liquid pipeline is also provided with a liquid replenishment pipeline; the primary side return liquid pipeline, the primary side supply liquid pipeline and the secondary side return liquid pipeline are all connected to the drain pipeline, and the drain pipeline is located at the lowest point in the cabinet body.

[0006] Preferably, the primary side return liquid pipeline is provided with butterfly valve 1 and butterfly valve 2 at both ends of the Y-type filter, the two ends of the primary side standby return liquid line are respectively located at the front end of butterfly valve 1 and the rear end of butterfly valve 2, and butterfly valve 3 is provided in the primary side standby return liquid line.

[0007] Preferably, an automatic exhaust valve is provided at the highest point of the primary side liquid return pipeline.

[0008] Preferably, the drainage pipeline includes a first branch, a second branch, a third branch and a liquid injection port that are independently controlled. The first branch is connected to the lowest point of the primary side return pipeline, the second branch is connected to the lowest point of the primary side supply pipeline, and the third branch 93 is connected to the liquid replenishment pipeline.

[0009] Preferably, butterfly valve four and butterfly valve five are provided at both ends of Y-type filter two, a bypass pipeline connects the front end of butterfly valve four and the rear end of butterfly valve five, and butterfly valve six is ​​provided in the bypass pipeline; pressure sensor three is provided between butterfly valve four and the plate heat exchanger, and pressure sensor four is provided at the rear end of the secondary side liquid supply pipeline.

[0010] Preferably, the secondary side return liquid pipeline includes a closed expansion water tank and a water pump. The outlet of the closed expansion water tank is connected to the water pump through a butterfly valve seven. A butterfly valve eight, a one-way valve and an electric three-way valve are arranged in sequence between the water pump and the plate heat exchanger. One end of the electric three-way valve is connected to the secondary side liquid supply pipeline.

[0011] Preferably, the closed expansion water tank is connected to the liquid replenishment pipeline, which includes a water replenishment tank, the bottom of which is higher than the top of the closed expansion water tank; a liquid filling port and a liquid level switch are provided on the top of the water replenishment tank, and the bottom of the water replenishment tank is connected to the closed expansion water tank.

[0012] Preferably, the front door panel of the cabinet is connected to the cabinet frame through a connecting rod lock, and a touch screen is provided on the front door panel.

[0013] Compared with the existing technology, the present invention provides a data center liquid cooling distribution unit (CDU), which has the following beneficial effects:

[0014] 1. Both the primary side return liquid pipeline and the secondary side supply liquid pipeline are equipped with redundant backup pipelines to ensure that the backup pipeline is activated when the main pipeline is blocked to ensure that the equipment does not stop.

[0015] 2. Each branch of the drainage pipeline is located at the lowest position of each pipeline. Each branch is equipped with a hand valve, which can be operated separately to effectively drain excess liquid in the system.

[0016] 3. The four interfaces of the plate heat exchanger are located on the same side, which provides favorable conditions for the space layout inside the cabinet.

[0017] 4. The primary and secondary liquid supply and return ports are located at the bottom of the unit, which is convenient for the pipeline to be routed from the bottom of the unit. All valves can be operated after the front and rear doors of the unit are opened. For example, the water supply port of the water supply tank is located on the side of the cabinet rear door. You only need to open the cabinet rear door panel to start the liquid injection.

[0018] 5. The bottom front of the data center liquid cooling distribution unit CDU is equipped with universal wheels to facilitate the movement of the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the appearance structure of the utility model;

[0020] Figure 2 The internal structure of the utility model is shown in FIG. Figure 1 ;

[0021] Figure 3 The internal structure of the utility model is shown in FIG. Figure 2 ;

[0022] Figure 4 The internal structure of the utility model is shown in FIG. Figure 3 ;

[0023] Explanation of the accompanying symbols: 1. Cabinet; 11. Side door panel; 12. Front door panel; 13. Touch screen; 14. Connecting rod lock; 15. Universal wheel; 2. Electric control box; 3. Plate heat exchanger; 31. Primary side liquid return port; 32. Primary side liquid supply port; 33. Secondary side liquid supply port; 34. Secondary side liquid return port; 4. Primary side liquid return pipeline; 41. Electric two-way regulating valve; 42. Temperature sensor 1; 43. Pressure sensor 1; 44. Butterfly valve 1; 45. Y-type filter 1; 46. Butterfly valve 2; 47. Primary side spare liquid return line; 48. Butterfly valve 3; 49. Automatic exhaust valve; 5. Primary side liquid supply pipeline; 51. Electromagnetic flowmeter 1; 52. Needle valve 1; 53. Temperature sensor 2; 54. Pressure sensor 2; 6. Secondary side liquid supply pipeline; 61. Butterfly valve 4; 62. Y-type filter 2; 63. Butterfly valve 5; 64. Needle valve 2; 65. Electromagnetic flowmeter 2; 66. Bypass line; 661. Butterfly valve 6; 67. Pressure sensor 3; 68. Pressure sensor 4; 69. Temperature sensor 3; 7. Secondary side return line; 71. Temperature sensor 4; 72. Pressure sensor 5; 73. Closed expansion tank; 74. Butterfly valve 7; 75. Water pump; 76. Butterfly valve 8; 77. Check valve; 78. Electric three-way valve; 8. Liquid replenishment line; 81. Water replenishment tank; 82. Liquid filling port; 83. Y-type filter 3; 84. Electric water replenishment pump; 85. Solenoid valve; 86. Hand valve; 87. Liquid level switch; 9. Drain line; 91. First branch; 92. Second branch; 93. Third branch; 94. Liquid filling port. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described below with reference to the accompanying drawings in the embodiments of the present invention:

[0025] In order to solve the problems raised in the background technology, the present invention improves the pipelines of the CDU, and configures redundant backup pipelines for both the primary side return liquid pipeline and the secondary side supply liquid pipeline. When the primary side return liquid pipeline and the secondary side supply liquid pipeline are blocked, the backup pipeline is activated without affecting the use of the CDU. As shown in the figure, the data center liquid cooling distribution unit CDU of the present invention includes a cabinet 1, which adopts a welded frame. There is an electric control box 2 inside the cabinet 1. The fixing bracket of the electric control box 2 uses four countersunk screws to ensure stability with the cabinet 1 frame. The front door panel 12 of the cabinet 1 is connected to the cabinet 1 frame through a connecting rod lock 14. The connecting rod lock 14 has a built-in hinge to facilitate the opening and closing of the front and rear door panels. A touch screen 13 is provided on the front door panel 12, and the touch screen 13 can be effectively operated. The side door panels 11 of the cabinet 1 are fixed with four cylindrical locks to facilitate the disassembly of the side door panels 11. Four universal wheels 15 are provided at the bottom of the cabinet 1, and the universal wheels 15 can facilitate the movement of the unit.

[0026] Cabinet 1 houses a plate heat exchanger 3. One side of the plate heat exchanger 3 is equipped with a primary liquid return port 31, a primary liquid supply port 32, a secondary liquid supply port 33, and a secondary liquid return port 34. The primary liquid return port 31 is connected to the primary liquid return line 4; the primary liquid supply port 32 is connected to the primary liquid supply line 5; the secondary liquid supply port 33 is connected to the secondary liquid supply line 6; and the secondary liquid return port 34 is connected to the secondary liquid return line 7. The primary liquid return line 4 and the primary liquid supply line 5 are connected to a closed cooling tower, while the secondary liquid supply line 6 and the secondary liquid return line 7 are connected to liquid-cooled servers. The primary return line 4, primary supply line 5, secondary supply line 6, and secondary return line 7 are all connected to a drain line 9, which is located at the lowest point in the cabinet 1. The drain line 9 includes a first branch 91, a second branch 92, a third branch 93, and a liquid injection port 94, each of which is independently controlled. Manual valves are provided on the first branch 91, the second branch 92, and the third branch 93 to ensure independent control of each branch. The first branch 91 connects to the lowest point of the primary return line 4, the second branch 92 connects to the lowest point of the primary supply line 5, and the third branch 93 connects to the liquid replenishment line 8 above the secondary return line 7. The liquid injection port 94 is located at the lowest point of the drain line 9. The drain line 9 is a process of connecting the lowest points of each pipeline in parallel, which can effectively remove excess liquid from the system and quickly inject coolant into each pipeline through the liquid injection port 94.

[0027] The primary side liquid return pipeline 4 includes an electric two-way regulating valve 41, a temperature sensor 42, a pressure sensor 43, a butterfly valve 44, a Y-type filter 45 and a butterfly valve 46 in sequence. The two ends of the Y-type filter 45 are also connected to the primary side standby liquid return line 47. The two ends of the Y-type filter 45 are respectively provided with a butterfly valve 44 and a butterfly valve 46. The two ends of the primary side standby liquid return line 47 are respectively located at the front end of the butterfly valve 44 and the rear end of the butterfly valve 46. The front end of the primary side standby liquid return line 47 is provided with a butterfly valve 3 48, which controls the opening and closing of the primary side standby liquid return line 47; the temperature sensor 42 and the pressure sensor 43 are used to measure the pressure and temperature of the liquid in the primary side liquid return pipeline 4; the automatic exhaust valve 49 is located at the highest position of the primary side liquid return pipeline 4 to automatically discharge excess gas in the pipeline. Since the unit needs to operate without stopping, the liquid in the closed cooling tower passes through the primary side return liquid pipeline 4 and is filtered by the Y-type filter 45 before entering the plate heat exchanger 3. After a period of use, the Y-type filter 45 is prone to blockage. At this time, it is only necessary to open the butterfly valve 3 48 in the primary side standby return liquid line 47, and then close the butterfly valve 1 44 and the butterfly valve 2 46. The butterfly valve 1 44 and the butterfly valve 2 46 isolate the Y-type filter 45 from the flow path, so that the unit can still operate without stopping. The Y-type filter 45 can be repaired or replaced without stopping the unit. The setting of the primary side standby return liquid line 47 and the butterfly valve 3 48 achieves the goal of normal operation of the unit in the event of a blockage failure in the main line.

[0028] The coolant in the plate heat exchanger 3 flows back to the closed cooling tower through the primary side liquid supply pipeline 5. The primary side liquid supply pipeline 5 includes an electromagnetic flowmeter 51, a needle valve 52, a temperature sensor 53 and a pressure sensor 54. The electromagnetic flowmeter 51 is used to measure the flow rate of the liquid in the primary side liquid supply pipeline 5, and can provide timely feedback and adjust the flow rate. The needle valve 52 is used to maintain pressure. The temperature sensor 53 and the pressure sensor 54 are used to measure the pressure and temperature of the liquid in the primary side liquid supply pipeline 5.

[0029] The secondary side liquid supply pipeline 6 transports the coolant from the plate heat exchanger 3 to the liquid cooling server. The coolant passes through the butterfly valve four 61, Y-type filter two 62, butterfly valve five 63, needle valve two 64, and electromagnetic flowmeter two 65 in the secondary side liquid supply pipeline 6 in turn to reach the liquid cooling server. A pressure sensor three 67 is provided between the butterfly valve four 61 and the secondary side liquid supply port 33, and a pressure sensor four 68 and a temperature sensor three 69 are provided between the rear end of the electromagnetic flowmeter two 65 and the liquid cooling server; the bypass pipeline 66 connects the front end of the butterfly valve four 61 and the rear end of the butterfly valve five 63, and a butterfly valve six 661 is provided in the bypass pipeline 66. The pressure sensor three 67 and the pressure sensor four 68 are used to check the pressure value and judge whether the Y-type filter two 62 is blocked according to the pressure difference. The temperature sensor three 69 is used to measure the coolant temperature. The coolant is filtered through the Y-type filter 2 62 and then input into the liquid-cooled server. When the difference between the pressure sensor 3 67 and the pressure sensor 4 68 exceeds a certain value, it indicates that the Y-type filter 2 62 is clogged. At this time, the butterfly valve 4 61 and the butterfly valve 5 63 are closed to isolate the Y-type filter 2 62, and the butterfly valve 6 661 is opened to allow the coolant to enter the liquid-cooled server through the bypass line 66. The setting of the bypass line 66 enables the unit to operate without shutting down. The Y-type filter 2 62 can be repaired or replaced without shutting down the unit. The setting of the bypass line 66 achieves the goal of normally delivering coolant to the liquid-cooled server in the event of a blockage failure of the main line.

[0030] The secondary side liquid return pipeline 7 transports the coolant in the liquid-cooled server back to the plate heat exchanger 3. The secondary side liquid return pipeline 7 includes a closed expansion water tank 73 and a water pump 75. The outlet of the closed expansion water tank 73 is connected to the water pump 75 through a butterfly valve 74. A butterfly valve 8 76, a one-way valve 77 and an electric three-way valve 78 are provided in sequence between the water pump 75 and the plate heat exchanger 3. A temperature sensor 4 71 and a pressure sensor 5 72 are installed between the closed expansion tank 73 and the liquid-cooled server. These sensors detect the temperature and pressure of the coolant discharged from the liquid-cooled server. The coolant in the liquid-cooled server then passes through the temperature sensor 4 71, pressure sensor 5 72, closed expansion tank 73, butterfly valve 74, water pump 75, butterfly valve 8 76, check valve 77, and electric three-way valve 78 before reaching the plate heat exchanger 3. One path of the electric three-way valve 78 connects to the secondary liquid return port 34 and another path connects to the secondary liquid supply port 33. When the flow rate in the secondary liquid supply line 6 is excessive, the electric three-way valve 78 can be used to return the coolant to the plate heat exchanger 3, thereby regulating the flow rate in the secondary liquid supply line 6. Two sets of butterfly valve 74, water pump 75, butterfly valve 8 76, and check valve 77 are provided for redundancy.

[0031] The secondary side liquid return pipeline 7 is also provided with a liquid replenishment pipeline 8, wherein the closed expansion water tank 73 is connected to the liquid replenishment pipeline 8, and the liquid replenishment pipeline 8 includes a water replenishment tank 81, a Y-type filter 3 83, an electric water replenishment pump 84, a solenoid valve 85, and a hand valve 86. The bottom of the water replenishment tank 81 is higher than the top of the closed expansion water tank 73; a liquid filling port 82 and a liquid level switch 87 are provided at the top of the water replenishment tank 81, and the bottom of the water replenishment tank 81 is connected to the closed expansion water tank 73 through the Y-type filter 3 83, the electric water replenishment pump 84, the solenoid valve 85, and the hand valve 86. When the system is short of fluid, refill line 8 transports coolant from refill tank 81 to closed expansion tank 73. Refill tank 81 has a built-in refill port 82 to facilitate refilling. When the system is short of fluid, solenoid valve 85 automatically opens, and the coolant is filtered through Y-type filter 3 83 before being pumped by electric refill pump 84 to solenoid valve 85 and then to manual valve 86, which regulates the flow rate before reaching closed expansion tank 73. Refill tank 81 also includes a liquid level switch 87, which provides prompt feedback when the liquid level in refill tank 81 is too low, alerting the operator to refill immediately. The connection between Y-type filter 3 83, electric refill pump 84, and solenoid valve 85 is a transparent PVC hose, secured with clamps at both ends. This allows for intuitive monitoring of refill status.

[0032] During use, the primary side liquid return pipeline 4 filters the coolant in the cooling tower through the Y-type filter 45 and then delivers it to the plate heat exchanger 3 through the primary side liquid return port 31. The plate heat exchanger 3 returns the used coolant to the cooling tower through the primary side liquid supply pipeline 5. When the Y-type filter 45 is blocked, it is only necessary to open the primary side spare liquid return line 47 to repair the Y-type filter 45 and then switch the flow path. The secondary side liquid supply pipeline 6 transports the coolant in the plate heat exchanger 3 to the liquid-cooled server, and the bypass pipeline 66 is set at both ends of the Y-type filter 2 62; when the Y-type filter 2 62 is blocked, the bypass pipeline 66 is activated without affecting the supply of coolant to the liquid-cooled server; the secondary side liquid return pipeline 7 transports the coolant in the liquid-cooled server to the plate heat exchanger 3; the primary side liquid return pipeline 4, the primary side liquid supply pipeline 5 and the secondary side liquid return pipeline 7 are all connected to the drain pipeline 9. The drain pipeline 9 connects the lowest positions of each pipeline in parallel and controls them separately, which can effectively and timely remove excess liquid from the system.

[0033] The utility model ensures different operations of the unit by setting up spare pipelines at locations prone to blockage. The drainage pipeline 9 promptly removes excess liquid in each pipeline, which better solves the problems in the existing technology and provides a guarantee for the stable operation of the unit.

[0034] The above embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. A data center liquid cooling distribution unit (CDU), comprising a cabinet (1), wherein a universal wheel (15) is provided at the bottom of the cabinet (1), and wherein: A plate heat exchanger (3) is provided in the cabinet (1). The plate heat exchanger (3) is respectively connected to a primary side liquid return line (4), a primary side liquid supply line (5), a secondary side liquid supply line (6) and a secondary side liquid return line (7). The primary side liquid return line (4) includes a Y-type filter (45), and both ends of the Y-type filter (45) are also connected to a primary side standby liquid return line (47); the secondary side liquid supply line (6) includes a Y-type filter (62), and both ends of the Y-type filter (62) are also connected to a bypass line (66); the secondary side liquid return line (7) is also provided with a liquid replenishment line (8); the primary side liquid return line (4), the primary side liquid supply line (5) and the secondary side liquid return line (7) are all connected to a liquid discharge line (9), and the liquid discharge line (9) is located at the lowest point in the cabinet (1).

2. The data center liquid cooling distribution unit (CDU) according to claim 1, wherein: The primary side liquid return pipeline (4) is provided with a butterfly valve (44) and a butterfly valve (46) at both ends of the Y-type filter (45), and the two ends of the primary side standby liquid return line (47) are located at the front end of the butterfly valve (44) and the rear end of the butterfly valve (46), respectively. The primary side standby liquid return line (47) is provided with a butterfly valve (48).

3. The data center liquid cooling distribution unit (CDU) according to claim 2, wherein: An automatic exhaust valve (49) is provided at the highest point of the primary side liquid return pipeline (4).

4. The data center liquid cooling distribution unit (CDU) according to claim 3, wherein: The liquid discharge pipeline (9) comprises a first branch (91), a second branch (92), a third branch (93) and a liquid injection port (94) which are independently controlled. The first branch (91) is connected to the lowest point of the primary side liquid return pipeline (4), the second branch (92) is connected to the lowest point of the primary side liquid supply pipeline (5), and the third branch (93) is connected to the liquid replenishment pipeline (8).

5. The data center liquid cooling distribution unit (CDU) according to claim 4, characterized in that: A butterfly valve 4 (61) and a butterfly valve 5 (63) are provided at both ends of the Y-type filter 2 (62); a bypass pipeline (66) is connected to the front end of the butterfly valve 4 (61) and the rear end of the butterfly valve 5 (63); a butterfly valve 6 (661) is provided in the bypass pipeline (66); a pressure sensor 3 (67) is provided between the butterfly valve 4 (61) and the plate heat exchanger (3); and a pressure sensor 4 (68) is provided at the rear end of the secondary side liquid supply pipeline (6).

6. The data center liquid cooling distribution unit (CDU) according to claim 5, characterized in that: The secondary side liquid return pipeline (7) includes a closed expansion water tank (73) and a water pump (75). The outlet of the closed expansion water tank (73) is connected to the water pump (75) through a butterfly valve (74). A butterfly valve (76), a one-way valve (77) and an electric three-way valve (78) are sequentially provided between the water pump (75) and the plate heat exchanger (3). One end of the electric three-way valve (78) is connected to the secondary side liquid supply pipeline (6).

7. The data center liquid cooling distribution unit (CDU) according to claim 6, wherein: The closed expansion water tank (73) is connected to the liquid replenishing pipeline (8), and the liquid replenishing pipeline (8) includes a water replenishing tank (81). The bottom of the water replenishing tank (81) is higher than the top of the closed expansion water tank (73); the top of the water replenishing tank (81) is provided with a liquid filling port (82) and a liquid level switch (87), and the bottom of the water replenishing tank (81) is connected to the closed expansion water tank (73).

8. The data center liquid cooling distribution unit (CDU) according to claim 1, wherein: The front door panel (12) of the cabinet (1) is connected to the cabinet (1) frame via a connecting rod lock (14), and a touch screen (13) is provided on the front door panel (12).

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