Liquid cooling distribution device and cabinet heat exchange device

Abstract

The invention provides a liquid cooling distribution device and a cabinet heat exchange device.The liquid cooling distribution device comprises a heat exchanger, a first pump, a second pump, a secondary side liquid inlet, a secondary side liquid outlet, a primary side liquid inlet, a primary side liquid outlet and a three-way adjusting valve; the other end of the first pump communicates with one end of the first heat exchange pipe section, the other end of the first heat exchange pipe section communicates with the secondary side liquid outlet, one end of the second pump communicates with the first pipeline through the fourth pipeline, and the other end of the second pump communicates with the second pipeline through the fifth pipeline; the primary side liquid inlet is communicated with one end of the second heat exchange pipe section, and the other end of the second heat exchange pipe section is communicated to the primary side liquid outlet; only one of the first pump and the second pump is opened, and the other pump is in a standby state at the moment. According to the invention, the problem that the water pump of the CDU in the prior art cannot be maintained and replaced under the condition that the CDU is not shut down can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of liquid cooling distribution units, and in particular to a liquid cooling distribution device and a cabinet heat exchange device. Background Art

[0002] With the rapid growth in demand for artificial intelligence and high-performance computing, the power density of single cabinets in data centers is getting higher and higher. Traditional air cooling will not be able to meet the cooling needs of server chips, and liquid cooling will become an inevitable trend for high-performance server cooling.

[0003] Cooling Distribution Units (CDUs) are systems that enable smaller, more efficient, and more accurate liquid cooling in rack-level data centers, typically integrating facility water. The CDU circulates coolant in a closed-loop system within the rack on the secondary (cooling application) side and utilizes facility water on the primary (heat dissipation) side. The CDU has pumps, water tanks, power supplies, control boards, and heat exchangers as key components. Other equipment such as filters, flow meters, pressure sensors, and valves are also used to manage the operation of the CDU in conjunction with the server racks. When integrated into the server cabinet, the coolant is distributed to a series of servers or heat sources. The CDU can manage the performance of the liquid cooling system, eliminating the noise of air cooling in the data center, and energy-saving data centers can obtain the precise, optimal cooling performance required by the system.

[0004] Since the water pump of the CDU in the prior art cannot be repaired or replaced without shutting down the CDU and cannot accurately and quickly control the flow rate, damage may cause the system to fail to operate normally and have low reliability and other technical problems. Therefore, the present invention studies and designs a liquid cooling distribution device and a cabinet heat exchange device. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that the water pump of the CDU cannot be repaired and replaced without shutting down the CDU and cannot accurately and quickly control the flow rate, thereby providing a liquid cooling distribution device and a cabinet heat exchange device.

[0006] In order to solve the above problems, the present invention provides a liquid cooling distribution device, which includes:

[0007] A heat exchanger, a first pump, a second pump, a secondary side liquid inlet, a secondary side liquid outlet, a primary side liquid inlet, a primary side liquid outlet and a three-way regulating valve, wherein the heat exchanger has a first heat exchange pipe section and a second heat exchange pipe section inside, the three-way regulating valve has a first end, a second end and a third end, and the three-way regulating valve has three states and can be switched between the three states: a first state: the first end is connected to the second end and the third end is disconnected; a second state: the first end is connected to the third end and the second end is disconnected; a third state: the first end is connected to both the second end and the third end;

[0008] The secondary side liquid inlet can be communicated with the first end of the three-way regulating valve, one end of the first pump can be communicated with the second end of the three-way regulating valve, one end of the second pump can be communicated with the third end of the three-way regulating valve, the other end of the first pump and the other end of the second pump can both be communicated with one end of the first heat exchange pipe segment, and the other end of the first heat exchange pipe segment can be communicated to the secondary side liquid outlet;

[0009] The primary side liquid inlet can be connected to one end of the second heat exchange pipe segment, and the other end of the second heat exchange pipe segment can be connected to the primary side liquid outlet;

[0010] The first heat exchange pipe section exchanges heat with the second heat exchange pipe section, and only one of the first pump and the second pump is turned on, while the other is in a standby state; when the first pump needs maintenance, the first end of the three-way regulating valve is connected to the third end, and the second end is blocked, so that the first pump is not connected and the second pump is connected; when the second pump needs maintenance, the first end of the three-way regulating valve is connected to the second end, and the third end is blocked, so that the second pump is not connected and the first pump is connected;

[0011] It also includes a proportional regulating valve, which can adjust the flow rate of the heat exchange fluid entering the first heat exchange pipe section and / or the second heat exchange pipe section according to the load of the liquid cooling distribution device.

[0012] In some embodiments,

[0013] The heat exchanger further comprises a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, a fifth pipeline, a sixth pipeline, a seventh pipeline and an eighth pipeline, one end of the first pipeline is connected to the first end of the three-way regulating valve, one end of the second pipeline is connected to the second end of the three-way regulating valve, the other end of the second pipeline is connected to one end of the first pump, the other end of the first pump is connected to one end of the first heat exchange pipe section through the third pipeline, the other end of the first heat exchange pipe section is connected to the secondary side liquid outlet through the fourth pipeline, the fifth pipeline connects one end of the second pump to the third end of the three-way regulating valve, and the sixth pipeline connects the other end of the second pump to the third pipeline;

[0014] The primary side liquid inlet is connected to one end of the second heat exchange pipe segment through the seventh pipeline, and the other end of the second heat exchange pipe segment is connected to the primary side liquid outlet through the eighth pipeline;

[0015] The proportional control valve is arranged on the eighth pipeline and / or between the fourth pipeline and the first pipeline.

[0016] In some embodiments,

[0017] It also includes a ninth pipeline and a tenth pipeline, the proportional regulating valve is a three-way proportional valve, the three-way proportional valve includes a fourth end, a fifth end and a sixth end, the fifth end can be connected to the fourth end and / or connected to the sixth end; one end of the ninth pipeline is connected to the secondary side liquid inlet, the other end of the ninth pipeline is connected to the fourth end of the three-way regulating valve, the other end of the first pipeline is connected to the fifth end of the three-way proportional valve, one end of the tenth pipeline is connected to the sixth end of the three-way proportional valve, and the other end of the tenth pipeline is connected to the fourth pipeline;

[0018] The three-way proportional valve can adjust the flow from the sixth end to the fifth end, and thereby adjust the flow of the fluid from the tenth pipeline to the first pipeline; when the load of the liquid cooling distribution device is less than a first preset load, the flow from the sixth end of the three-way proportional valve to the fifth end can be increased, and when the load of the liquid cooling distribution device is greater than a second preset load, the flow from the sixth end of the three-way proportional valve to the fifth end can be reduced, wherein the first preset load is less than or equal to the second preset load.

[0019] In some embodiments,

[0020] The proportional control valve is a two-way proportional valve, which is arranged on the eighth pipeline. The other end of the first pipeline is connected to the secondary side liquid inlet. The two-way proportional valve can adjust the flow rate of the fluid flowing from the eighth pipeline to the primary side liquid outlet; when the load of the liquid cooling distribution device is less than the first preset load, the opening of the two-way proportional valve can be reduced, and when the load of the liquid cooling distribution device is greater than the second preset load, the opening of the two-way proportional valve can be increased, wherein the first preset load is less than or equal to the second preset load.

[0021] In some embodiments,

[0022] It also includes a liquid replenishing tank and a liquid replenishing pump, wherein the liquid replenishing tank can be connected to the first pipeline through an eleventh pipeline, and the liquid replenishing pump is arranged on the eleventh pipeline; the liquid replenishing tank is also respectively connected with a liquid discharge port and a liquid replenishing port;

[0023] It also includes an expansion tank and a twelfth pipeline, wherein the expansion tank is connected to the first pipeline through the twelfth pipeline;

[0024] It also includes a first one-way valve and a second one-way valve, wherein the first one-way valve is arranged on the third pipeline to only allow fluid to flow from the first pump to the first heat exchange pipe section; the second one-way valve is arranged on the sixth pipeline to only allow fluid to flow from the second pump to the first heat exchange pipe section.

[0025] In some embodiments,

[0026] It also includes a shell, the heat exchanger, the first pump and the second pump are all arranged inside the shell, and the secondary side liquid inlet, the secondary side liquid outlet, the primary side liquid inlet and the primary side liquid outlet are arranged outside the shell;

[0027] The device also includes at least two fans, at least one of which is in operation and at least one is in standby mode.

[0028] In some embodiments,

[0029] It also includes an electrical box, which is located in the housing and has a controller disposed inside the electrical box;

[0030] The at least two fans include a first fan and a second fan disposed on one side of the electrical box, and a third fan and a fourth fan disposed on the other side of the electrical box.

[0031] The first fan and the third fan form a first fan group, the second fan and the fourth fan form a second fan group, the first fan group forms a first wind path for driving airflow, the second fan group forms a second wind path for driving airflow, and only one fan in the first fan group is turned on and the other is in standby mode, and only one fan in the second fan group is turned on and the other is in standby mode.

[0032] In some embodiments,

[0033] The housing comprises a front panel and a rear panel which are arranged opposite to each other, a first grille and a second grille are provided on the front panel, and a third grille is provided on the rear panel, the first grille is arranged opposite to the first fan, and the second grille is arranged opposite to the second fan; the first grille and the second grille are air inlet grilles, and the third grille is an air outlet grille;

[0034] Parallel working mode: the first fan and the second fan are both running, and the third fan and the fourth fan are both in standby mode; or the third fan and the fourth fan are both running, and the first fan and the second fan are both in standby mode;

[0035] Cross-working mode: the first fan and the fourth fan are both running, while the second fan and the third fan are both in standby mode; or, the second fan and the third fan are both running, while the first fan and the fourth fan are both in standby mode.

[0036] In some embodiments,

[0037] The front panel is also provided with a display screen, a switch and a communication interface, and the first grid and the second grid are symmetrically arranged relative to the display screen;

[0038] The secondary liquid inlet, secondary liquid outlet, primary liquid inlet and primary liquid outlet are all arranged on the rear panel, the secondary liquid inlet and the secondary liquid outlet are symmetrically arranged relative to the third grille, and the primary liquid inlet and the primary liquid outlet are symmetrically arranged relative to the third grille.

[0039] The present invention also provides a cabinet heat exchange device, which includes the aforementioned liquid cooling distribution device.

[0040] The liquid cooling distribution device and cabinet heat exchange device provided by the present invention have the following beneficial effects:

[0041] 1. The present invention provides at least two pumps, which are respectively connected to the heat exchange device, the secondary side liquid inlet and the secondary side liquid outlet, and only one of the two pumps is turned on while the other is in standby state, so that a backup redundant design can be realized, so that when one of the pumps is damaged or fails, the other can continue to work, and can be repaired and replaced without shutting down the CDU, thereby improving the operating reliability of the liquid cooling distribution device and the service life of the liquid cooling distribution device, and solving the problem that the water pump of the CDU in the prior art does not have redundancy, and if damaged, it will cause the system to fail to operate normally and the system reliability is low; the present invention also adjusts the flow rate of the heat exchange fluid entering the first heat exchange pipe section and / or the second heat exchange pipe section according to the load of the liquid cooling distribution device through the setting of a proportional regulating valve, and can realize accurate and fast control of the flow rate to adapt to different loads, improve versatility, and reduce energy waste while meeting the heat exchange requirements, thereby improving energy efficiency.

[0042] 2. The present invention also provides at least two fans, at least one of which is running and at least one is in standby mode, so that the fans also have a backup redundant design, so that when one or a group of fans is damaged or fails, the other one or a group can continue to work, thereby further improving the operational reliability of the liquid cooling distribution device and further improving the service life of the liquid cooling distribution device; the present invention also provides the first and second fans on one side of the electrical box, and the third and fourth fans on the other side of the electrical box, so that fans are arranged on both sides of the electrical box, thereby improving the uniformity of airflow flow and improving the uniformity of heat exchange of the electrical box and other components inside the shell by the airflow; the first and second grilles of the present invention are symmetrically arranged relative to the display screen, and the first and second fans are respectively opposite to the first and second grilles, so that the two fans are also symmetrically arranged relative to the display screen, thereby improving the overall aesthetics of the liquid cooling distribution unit.

[0043] 3. The present invention also provides a proportional regulating valve, preferably a three-way proportional valve, which is provided at the connection between the tenth pipeline, the ninth pipeline and the first pipeline, and can adjust the flow rate of the heat exchange fluid entering the first heat exchange pipe section according to the load of the liquid cooling distribution device. In particular, when the load of the liquid cooling distribution device is less than the first preset load, the flow rate from the sixth end of the three-way proportional valve to the fifth end can be increased, and when the load of the liquid cooling distribution device is greater than the second preset load, the flow rate from the sixth end of the three-way proportional valve to the fifth end can be reduced, thereby achieving fine control of the flow rate to adapt to different loads, that is, when the heat exchange load of the liquid cooling distribution device is small, more fluid can be bypassed through the proportional valve to return to the first pipeline, reducing the flow rate of the heat exchange fluid and reducing energy waste; and when the heat exchange load of the liquid cooling distribution device is large, a smaller amount of fluid is bypassed through the proportional valve to increase the flow rate of the heat exchange fluid, and increase the flow rate of the heat exchange fluid output to the outside, thereby meeting the heat exchange demand; thereby, fine control of the flow rate can be achieved to adapt to different loads, improve versatility, and reduce energy waste while meeting the heat exchange demand, thereby improving energy efficiency.

[0044] 4. The present invention also provides a proportional regulating valve, preferably a two-way proportional valve, which is provided on the eighth pipeline. The flow rate of the heat exchange fluid entering the second heat exchange pipe section can be changed according to the load of the liquid cooling distribution device, especially when the load of the liquid cooling distribution device is less than the first preset load, the opening of the two-way proportional valve is adjusted to decrease, and when the load of the liquid cooling distribution device is greater than the second preset load, the opening of the two-way proportional valve is adjusted to increase, thereby achieving fine control of the flow rate to adapt to different loads, that is, when the heat exchange load of the liquid cooling distribution device is small, the flow rate of the heat exchange fluid on the primary side can be reduced by reducing the opening of the two-way proportional valve, thereby ensuring the heat exchange capacity and reducing energy waste; and when the heat exchange load of the liquid cooling distribution device is large, the flow rate of the heat exchange fluid on the primary side is increased by increasing the opening of the two-way proportional valve, thereby meeting the heat exchange demand; thereby achieving fine control of the flow rate to adapt to different loads, improving versatility, and reducing energy waste while meeting the heat exchange demand, thereby improving energy efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1a is a front perspective structural diagram of the liquid cooling distribution device of the present invention;

[0046] Figure 1b is a back perspective structural diagram of the liquid cooling distribution device of the present invention;

[0047] Figure 2 is a system structure diagram of a first embodiment of a liquid cooling distribution device of the present invention;

[0048] Figure 3 This is a diagram of the internal structure of the liquid cooling distribution device of the present invention;

[0049] Figure 4 It is a system structure diagram of the second embodiment of the liquid cooling distribution device of the present invention.

[0050] The reference numerals are:

[0051] 10. Front panel; 11. Display screen; 12. Switch; 13. Communication interface; 14. First grille; 15. Second grille; 50. Third grille; 16. Handle; 20. Bottom shell; 30. Top cover; 40. Back panel; 42. Drain port; 43. Refill port; 44. Power supply connector; 46. Secondary side liquid inlet; 47. Primary side liquid outlet; 48. Primary side liquid inlet; 49. Secondary side liquid outlet; 51. First fan; 52. Second fan; 53. Third fan; 54. The fourth fan; 55, electrical box; 56, controller; 60, liquid replenishing tank; 70, liquid replenishing pump; 71, first pump; 72, second pump; 80, expansion tank; 90, three-way proportional valve; d, fourth end; e, fifth end; f, sixth end; 91, first check valve; 92, second check valve; 93, three-way regulating valve; a, first end; b, second end; c, third end; 94, two-way proportional valve; 100, heat exchanger; 100a, first heat exchange pipe section; 100b, second heat exchange pipe section;

[0052] 101. first pipeline; 102. second pipeline; 103. third pipeline; 104. fourth pipeline; 105. fifth pipeline; 106. sixth pipeline; 107. seventh pipeline; 108. eighth pipeline; 109. ninth pipeline; 110. tenth pipeline; 111. eleventh pipeline; 112. twelfth pipeline; 200. shell. DETAILED DESCRIPTION

[0053] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. 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.

[0054] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0055] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0056] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0057] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0058] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0059] like Figure 1a-4 As shown, the present invention provides a liquid cooling distribution device, which includes:

[0060] A heat exchanger 100, a first pump 71, a second pump 72, a secondary side liquid inlet 46, a secondary side liquid outlet 49, a primary side liquid inlet 48, a primary side liquid outlet 47 and a three-way regulating valve 93. The heat exchanger 100 has a first heat exchange pipe section 100a and a second heat exchange pipe section 100b inside. The three-way regulating valve 93 has a first end a, a second end b and a third end c. The three-way regulating valve 93 has three states and can be switched between the three states: a first state: the first end a is connected to the second end b and the third end c is disconnected; a second state: the first end a is connected to the third end c and the second end b is disconnected; a third state: the first end a is connected to the second end b and the third end c respectively;

[0061] The secondary side liquid inlet 46 can be communicated with the first end a of the three-way regulating valve 93, one end of the first pump 71 can be communicated with the second end b of the three-way regulating valve 93, one end of the second pump 72 can be communicated with the third end c of the three-way regulating valve 93, the other end of the first pump 71 and the other end of the second pump 72 can both be communicated with one end of the first heat exchange pipe segment 100a, and the other end of the first heat exchange pipe segment 100a can be communicated to the secondary side liquid outlet 49;

[0062] The primary side liquid inlet 48 can be connected to one end of the second heat exchange pipe segment 100b, and the other end of the second heat exchange pipe segment 100b can be connected to the primary side liquid outlet 47;

[0063] The first heat exchange pipe section 100a and the second heat exchange pipe section 100b exchange heat, and only one of the first pump 71 and the second pump 72 is turned on, and the other is in a standby state; when the first pump 71 needs maintenance, the first end a of the three-way regulating valve 93 is connected to the third end c, and the second end b is blocked, so that the first pump 71 is not connected and the second pump 72 is connected; when the second pump 72 needs maintenance, the first end a of the three-way regulating valve 93 is connected to the second end b, and the third end c is blocked, so that the second pump 72 is not connected and the first pump 71 is connected;

[0064] It also includes a proportional regulating valve, which can adjust the flow rate of the heat exchange fluid entering the first heat exchange pipe section 100a and / or the second heat exchange pipe section 100b according to the load of the liquid cooling distribution device.

[0065] The present invention provides at least two pumps, which are respectively connected to the heat exchange device, the secondary side liquid inlet and the secondary side liquid outlet, and only one of the two pumps is turned on while the other is in standby state, so that a backup redundant design can be implemented, so that when one of the pumps needs maintenance (damage or failure), the other can continue to work, and can be repaired and replaced without shutting down the CDU, thereby improving the operating reliability of the liquid cooling distribution device and the service life of the liquid cooling distribution device, and solving the problem that the water pump of the CDU in the prior art does not have redundancy, and if damaged, it will cause the system to fail to operate normally and the system reliability is low; the present invention also uses the setting of a proportional regulating valve to adjust the flow rate of the heat exchange fluid entering the first heat exchange pipe section and / or the second heat exchange pipe section according to the load of the liquid cooling distribution device, so as to achieve accurate and fast control of the flow rate to adapt to different loads, improve versatility, and reduce energy waste while meeting the heat exchange requirements, thereby improving energy efficiency.

[0066] In the present invention, when the CDU equipment is working normally, that is, when the first pump and the second pump are not broken, the double pumps are alternately opened and closed by electric control, and the three-way regulating valve 93 is preferably normally open, that is, the three ends a, b, and c are interconnected or fully connected. The three-way regulating valve 93 is used to repair and replace pumps. For example, when the first pump 71 is broken and needs to be changed, it is necessary to manually connect the first end a of the three-way regulating valve 93 with the third end c, and the second end b is blocked. Because there is a one-way valve behind the water pump, the second end b in front of the first water pump is blocked. Therefore, when the first pump 71 is replaced, the unit can use another pump to work normally, and the system will not leak due to the replacement of the first pump 71. When the second pump 72 is broken, it is necessary to manually connect the first end a of the three-way regulating valve 93 with the second end b, and the third end c is blocked. The same applies to the others.

[0067] In some embodiments,

[0068] The heat exchanger 71 further comprises a first pipeline 101, a second pipeline 102, a third pipeline 103, a fourth pipeline 104, a fifth pipeline 105, a sixth pipeline 106, a seventh pipeline 107 and an eighth pipeline 108, wherein one end of the first pipeline 101 is connected to the first end a of the three-way regulating valve 93, one end of the second pipeline 102 is connected to the second end b of the three-way regulating valve 93, the other end of the second pipeline 102 is connected to one end of the first pump 71, the other end of the first pump 71 is connected to one end of the first heat exchange pipe section 100a through the third pipeline 103, the other end of the first heat exchange pipe section 100a is connected to the secondary side liquid outlet 49 through the fourth pipeline 104, the fifth pipeline 105 connects one end of the second pump 72 to the third end c of the three-way regulating valve 93, and the sixth pipeline 106 connects the other end of the second pump 72 to the third pipeline 103;

[0069] The primary side liquid inlet 48 is connected to one end of the second heat exchange pipe segment 100b through the seventh pipeline 107, and the other end of the second heat exchange pipe segment 100b is connected to the primary side liquid outlet 47 through the eighth pipeline 108; the proportional control valve is arranged on the eighth pipeline 108, and / or is arranged between the fourth pipeline 104 and the first pipeline 101.

[0070] Through the connection relationship of the above-mentioned multiple pipelines, the present invention can effectively realize the connection of the heat exchange structure of two water pumps, heat exchangers, and three-way regulating valves on the secondary side, and can also realize the connection between the primary side and the second heat exchange pipe section of the heat exchanger, so as to realize a heat exchange structure of a heat exchanger, so that when one of the pumps is damaged or fails, the other can continue to work, thereby improving the operating reliability of the liquid cooling distribution device, and improving the service life of the liquid cooling distribution device, and solving the problem that the water pump of the CDU in the prior art does not have redundancy, and if damaged, it will cause the system to fail to operate normally and the system reliability is low; the present invention can also adjust the flow rate of the heat exchange fluid entering the first heat exchange pipe section and / or the second heat exchange pipe section according to the load of the liquid cooling distribution device through the connection setting form of the proportional regulating valve, so as to realize fine control of the flow rate to adapt to different loads, improve versatility, and reduce energy waste while meeting the heat exchange requirements, thereby improving energy efficiency.

[0071] The three-way regulating valve 93 (preferably a three-way ball valve) of the present invention has three states:

[0072] State 1: The secondary side liquid inlet 46 is connected to the first pump 71 but not to the second pump 72. In this case, the second pump 72 can be repaired and replaced.

[0073] State 2: The secondary side liquid inlet 46 is connected to the second pump 72 but not to the first pump 71. In this case, the first pump 71 can be repaired and replaced.

[0074] State 3: The secondary side liquid inlet 46 is connected to the first pump 71 and the second pump 72, which is the default non-maintenance state;

[0075] The default state among the three states is state 3. When the corresponding water pump needs to be repaired, it can be switched to state 1 or state 2 manually or electrically. Since there is a one-way valve behind the pump, when the secondary side liquid inlet 46 and one of the water pumps are not connected, the other spare pump can work normally while the pump is replaced.

[0076] In some embodiments,

[0077] like Figure 2, Embodiment 1, further comprising a ninth pipeline 109 and a tenth pipeline 110, wherein the proportional regulating valve is a three-way proportional valve 90, wherein the three-way proportional valve 90 comprises a fourth end d, a fifth end e and a sixth end f, wherein the fifth end e can be communicated with the fourth end d and / or with the sixth end f; one end of the ninth pipeline 109 is communicated with the secondary side liquid inlet 46, and the other end of the ninth pipeline 109 is communicated with the fourth end d of the three-way proportional valve 90, the other end of the first pipeline 101 is communicated with the fifth end e of the three-way proportional valve 90, one end of the tenth pipeline 110 is communicated with the sixth end f of the three-way proportional valve 90, and the other end of the tenth pipeline 110 is connected to the fourth pipeline 104;

[0078] The three-way proportional valve 90 can adjust the flow rate from the sixth end f to the fifth end e, and thereby adjust the flow rate of the fluid in the tenth pipeline 110 to the first pipeline 101; when the load of the liquid cooling distribution device is less than the first preset load, the flow rate from the sixth end f of the three-way proportional valve 90 to the fifth end e can be increased, and when the load of the liquid cooling distribution device is greater than the second preset load, the flow rate from the sixth end f of the three-way proportional valve 90 to the fifth end e can be reduced, wherein the first preset load is less than or equal to the second preset load.

[0079] The present invention also sets a proportional regulating valve, preferably a three-way proportional valve, which is set at the connection between the tenth pipeline, the ninth pipeline and the first pipeline. The flow rate of the heat exchange fluid entering the first heat exchange pipe section can be changed according to the load of the liquid cooling distribution device. In particular, when the load of the liquid cooling distribution device is less than the first preset load, the flow rate from the sixth end of the three-way proportional valve to the fifth end can be increased; when the load of the liquid cooling distribution device is greater than the second preset load, the flow rate from the sixth end of the three-way proportional valve to the fifth end can be reduced, thereby realizing fine control of the flow rate to adapt to different loads, that is, when the heat exchange load of the liquid cooling distribution device is small, more fluid can be bypassed through the proportional valve to return to the first pipeline, thereby reducing the flow rate of the heat exchange fluid and reducing energy waste; and when the heat exchange load of the liquid cooling distribution device is large, a smaller amount of fluid is bypassed through the proportional valve to increase the flow rate of the heat exchange fluid, and increase the flow rate of the heat exchange fluid output to the outside, thereby meeting the heat exchange demand; thereby, fine control of the flow rate can be realized to adapt to different loads, improve versatility, and reduce energy waste while meeting the heat exchange demand, thereby improving energy efficiency.

[0080] like Figure 2 and Figure 3As shown, it is the system principle diagram and the internal structure diagram of the whole machine of the present invention. The secondary side liquid enters the three-way proportional valve 90 from the secondary side liquid inlet 46 for fluid distribution, flows into the circulation pump system through the three-way regulating valve 93 (preferably a three-way ball valve) in one way, and connects to the secondary side outlet of the heat exchanger 100 in the other way, forming a short circuit for the pump to adjust the flow of the CDU secondary side liquid outlet 49; the circulation pump system includes a three-way ball valve, a parallel circulation pump (a first pump 71 and a second pump 72) and a first check valve 91 and a second check valve 92 connected in series at their outlets, respectively, and flows into the inlet of the heat exchanger 100 after passing through the circulation pump system, and flows out from the secondary side liquid outlet 49 after passing through the heat exchanger. The outflowing liquid is provided to the liquid cooling cabinet, and after cooling the liquid cooling cabinet, it returns to the secondary side liquid inlet 46, thereby forming a secondary side circulation (the one close to the cold source is called the primary side, and the one close to the user is called the secondary side).

[0081] Regarding the primary side of the system: the primary side is the cold source side, and the primary side fluid enters the heat exchanger 100 through the primary side liquid inlet 48 to exchange heat with the secondary side fluid, and then flows out of the CDU through the primary side liquid outlet 47.

[0082] In some embodiments,

[0083] like Figure 4 As shown, in embodiment 2, the proportional control valve is a two-way proportional valve 94, and the two-way proportional valve 94 is arranged on the eighth pipeline 108. The other end of the first pipeline 101 is connected to the secondary side liquid inlet 46, and the two-way proportional valve 94 can adjust the flow rate of the fluid flowing from the eighth pipeline 108 to the primary side liquid outlet 47; when the load of the liquid cooling distribution device is less than the first preset load, the opening of the two-way proportional valve 94 can be reduced, and when the load of the liquid cooling distribution device is greater than the second preset load, the opening of the two-way proportional valve 94 can be increased, wherein the first preset load is less than or equal to the second preset load.

[0084] The present invention also sets a proportional regulating valve, preferably a two-way proportional valve, which is set on the eighth pipeline. It can adjust the flow rate of the heat exchange fluid entering the second heat exchange pipe section according to the load of the liquid cooling distribution device, especially when the load of the liquid cooling distribution device is less than the first preset load, the opening of the two-way proportional valve is adjusted to decrease, and when the load of the liquid cooling distribution device is greater than the second preset load, the opening of the two-way proportional valve is adjusted to increase, thereby realizing fine control of the flow rate to adapt to different loads, that is, when the heat exchange load of the liquid cooling distribution device is small, the flow rate of the heat exchange fluid on the primary side can be reduced by reducing the opening of the two-way proportional valve, thereby ensuring the heat exchange capacity and reducing energy waste; and when the heat exchange load of the liquid cooling distribution device is large, the flow rate of the heat exchange fluid on the primary side is increased by increasing the opening of the two-way proportional valve, thereby meeting the heat exchange demand; thereby realizing fine control of the flow rate to adapt to different loads, improving versatility, and reducing energy waste while meeting the heat exchange demand, thereby improving energy efficiency.

[0085] Figure 4 In another embodiment of the present invention, the three-way proportional valve 90 is replaced with a two-way proportional valve 94, and the three-way proportional valve 90 between the secondary water pump inlet and the plate exchange outlet is removed. In this way, the heat exchange capacity of the CDU can be adjusted by directly adjusting the flow rate on the primary side without affecting the pressure difference on the secondary side. Figure 2 The three-way proportional valve is replaced with a two-way proportional valve 94. Compared with the structural layout of the three-way proportional valve, one three-way structure is reduced, making the system structure more compact.

[0086] In some embodiments,

[0087] It also includes a liquid replenishing tank 60 and a liquid replenishing pump 70. The liquid replenishing tank 60 can be connected to the first pipeline 101 through an eleventh pipeline 111 (that is, the outlet of the liquid replenishing pump 70 is preferably connected to the pipeline before the inlets of the two circulation pumps). The liquid replenishing pump 70 is arranged on the eleventh pipeline 111; the liquid replenishing tank 60 is also connected to the drain port 42 and the liquid replenishing port 43 respectively.

[0088] It also includes an expansion tank 80 and a twelfth pipeline 112, wherein the expansion tank 80 is connected to the first pipeline 101 through the twelfth pipeline 112;

[0089] It also includes a first one-way valve 91 and a second one-way valve 92. The first one-way valve 91 is arranged on the third pipeline 103 to only allow the fluid to flow from the first pump 71 to the first heat exchange pipe section 100a; the second one-way valve 92 is arranged on the sixth pipeline 106 to only allow the fluid to flow from the second pump 72 to the first heat exchange pipe section 100a.

[0090] This is a further preferred structural form of the liquid cooling distribution device of the present invention. By providing a liquid replenishing tank and a liquid replenishing pump, the first pipeline inside the liquid cooling distribution device can be replenished to ensure that the amount of liquid on the secondary side is sufficient, and sufficient heat exchange can be achieved to meet the needs of users. The excess liquid inside the liquid replenishing tank can be discharged through the liquid drain port, and the liquid replenishing port can replenish the liquid inside the liquid replenishing tank.

[0091] The present invention also provides an expansion tank, that is, an expansion tank 80 is connected to the inlet of the parallel circulation pump to balance the pressure of the system, so that the operation process of the liquid cooling distribution unit is more stable;

[0092] The present invention further preferably provides a first and a second one-way valve, which can ensure that the fluid pumped out by the first pump enters the heat exchanger while preventing the fluid in the heat exchanger from flowing back to the first pump. Similarly, it can ensure that the fluid pumped out by the second pump enters the heat exchanger while preventing the fluid in the heat exchanger from flowing back to the second pump.

[0093] The one-way valve of the present invention can prevent the liquid from flowing back to the circulation pump. The two sets of parallel circulation pumps are used in one for use and one for backup, which effectively improves the safety and emergency reliability of the CDU system. For easy maintenance, the two ends of the pump are preferably connected by a chuck.

[0094] The system of the present invention also includes a three-way proportional valve 90, the inlet and outlet of the three-way proportional valve 90 are respectively connected to the pipelines on both sides of the outlet and inlet of the parallel circulation pump system, that is, the circulation pump system is bypassed by the three-way proportional valve 90, and the secondary side heat exchange flow is adjusted by adjusting the three-way proportional valve 90.

[0095] In some embodiments,

[0096] It also includes a housing 200, the heat exchanger 100, the first pump 71 and the second pump 72 are all arranged inside the housing 200, and the secondary side liquid inlet 46, the secondary side liquid outlet 49, the primary side liquid inlet 48 and the primary side liquid outlet 47 are arranged outside the housing 200;

[0097] The device also includes at least two fans, at least one of which is in operation and at least one is in standby mode.

[0098] The present invention also provides at least two fans, at least one of which is running and at least one is in standby mode, so that the fans also have a backup redundant design, so that when one or a group of fans is damaged or fails, the other one or a group can continue to work, thereby further improving the operational reliability of the liquid cooling distribution device and further improving the service life of the liquid cooling distribution device.

[0099] In some embodiments,

[0100] It also includes an electrical box 55, which is located in the housing 200, and a controller 56 is disposed inside the electrical box 55;

[0101] The at least two fans include a first fan 51 and a second fan 52 disposed on one side of the electrical box 55, and a third fan 53 and a fourth fan 54 disposed on the other side of the electrical box 55.

[0102] The first fan 51 and the third fan 53 form a first fan group, the second fan 52 and the fourth fan 54 form a second fan group, the first fan group forms a first wind path for driving airflow, the second fan group forms a second wind path for driving airflow, and only one fan in the first fan group is turned on and the other is in standby mode, and only one fan in the second fan group is turned on and the other is in standby mode.

[0103] The present invention also arranges the first and second fans on one side of the electrical box, and the third and fourth fans on the other side of the electrical box, so that fans are arranged on both sides of the electrical box, thereby improving the uniformity of airflow and improving the uniformity of heat exchange of the electrical box and other components inside the shell; by having only one fan in the first fan group turned on and the other in standby mode, and having only one fan in the second fan group turned on and the other in standby mode, so that two air paths can circulate at the same time, each fan group also has a backup redundant design, so that when one of the fans needs maintenance, the other one can work, ensuring that the liquid cooling distribution device can be disassembled for maintenance during normal operation, further improving the operating reliability of the liquid cooling distribution device, and further improving the service life of the liquid cooling distribution device.

[0104] In some embodiments,

[0105] The housing 200 includes a front panel 10 and a rear panel 40 that are arranged opposite to each other. The front panel 10 is provided with a first grille 14 and a second grille 15. The rear panel 40 is provided with a third grille 50. The first grille 14 is arranged opposite to the first fan 51, and the second grille 15 is arranged opposite to the second fan 52. The first grille 14 and the second grille 15 are air inlet grilles, and the third grille 50 is an air outlet grille.

[0106] Parallel working mode: the first fan 51 and the second fan 52 are both running, and the third fan 53 and the fourth fan 54 are both in standby mode; or the third fan 53 and the fourth fan 54 are both running, and the first fan 51 and the second fan 52 are both in standby mode;

[0107] Cross-working mode: the first fan 51 and the fourth fan 54 are both running, while the second fan 52 and the third fan 53 are both in standby mode; or, the second fan 52 and the third fan 53 are both running, while the first fan 51 and the fourth fan 54 are both in standby mode.

[0108] These are a variety of different structural forms and operating modes of the cooperation between the two groups of fans (4 fans) and the three grilles of the present invention, that is, it can effectively achieve one fan group in one group running and the other on standby, and one fan group in another fan group running and the other on standby, ensuring a backup redundant design. When one of the running fan groups fails, the other fan group in the group can be operated to ensure continuous and effective operation of the liquid cooling distribution unit, thereby improving the operating reliability of the liquid cooling distribution device and increasing its service life.

[0109] The electrical box of the present invention is located at the front of the CDU, and a plurality of controllers 56 are arranged inside the electrical box 55; the electrical box 55 has a plurality of cooling fans on the front and rear surfaces along the length direction of the CDU, and there are at least two sets of cooling fans, which are used in a one-for-one mode, that is, one set of the front and rear fans is working, and the other set is not working. The front and rear panels of the CDU have air inlet and outlet grilles (the first grille 14, the second grille 15, and the third grille 50), which cooperate with the two sets of fans to form a cooling air duct; in order to facilitate the heat dissipation of the electrical box, the fan direction is preferably toward the inside of the electrical box.

[0110] The present invention provides a CDU system with a compact system, symmetrical and beautiful structure, and two sets of fans and air ducts are designed to achieve redundancy in heat dissipation of electrical components, thereby improving the reliability of the CDU. The proportional valve set by the bypass realizes fine control of the system flow.

[0111] In some embodiments,

[0112] The front panel 10 is also provided with a display screen 11, a switch 12 and a communication interface 13, and the first grid 14 and the second grid 15 are symmetrically arranged relative to the display screen 11;

[0113] The secondary liquid inlet 46, the secondary liquid outlet 49, the primary liquid inlet 48 and the primary liquid outlet 47 are all arranged on the rear panel 40, the secondary liquid inlet 46 and the secondary liquid outlet 49 are symmetrically arranged relative to the third grid 50, and the primary liquid inlet 48 and the primary liquid outlet 47 are symmetrically arranged relative to the third grid 50.

[0114] The first and second grilles of the present invention are symmetrically arranged relative to the display screen, and the first and second fans are respectively opposite to the first and second grilles, so that the two fans are also symmetrically arranged relative to the display screen, thereby improving the overall aesthetics of the liquid cooling distribution unit.

[0115] The present invention realizes redundant design of heat dissipation fans of the electrical box by symmetrically designing the front panel and air inlet and outlet grilles of the CDU, symmetrically designing the inlet and outlet water pipes of the rear panel, and symmetrically designing the air inlet and outlet of the electrical box in conjunction with double sets of fans, thereby achieving symmetrical and aesthetic appearance of the overall structure and improving the reliability of the CDU.

[0116] like Figure 1a and Figure 1b The figure shows the appearance of the present invention. The CDU shell of the present invention is composed of a front panel 10, a bottom shell 20, a top cover 30 and a rear panel 40; wherein the front panel 10 includes a display screen 11, a switch 12, a communication interface 13, a first grid 14, a second grid 15 and a handle 16; wherein the rear panel 40 includes a drain port 42, a liquid replenishment port 43, a power supply connector 44, a secondary side liquid inlet 46, a primary side liquid outlet 47, a primary side liquid inlet 48, a secondary side liquid outlet 49 and a third grid 50.

[0117] The present invention provides a CDU flow path system having a proportional valve with a bypass arrangement, which can achieve fine control of the system flow.

[0118] The present invention can solve the following problems simultaneously:

[0119] 1. The water pump and cooling fan in the current CDU structure have no redundancy and are not reliable enough;

[0120] 2. The current CDU flow control is not sophisticated enough;

[0121] 3. The current CDU system structure is not compact enough and not beautiful enough.

[0122] The present invention also provides a cabinet heat exchange device, which includes the aforementioned liquid cooling distribution device.

[0123] The improvement of the present invention is:

[0124] 1. Two water pumps are directly connected through a three-way ball valve, and the water pumps can be replaced online by switching.

[0125] 2. It saves structural space and avoids adding ball valves to each water pump and tee parts to the inlet pipe.

[0126] 3. A three-way proportional valve is used to adjust the CDU output flow rate, which can adjust the flow rate according to the load conditions. While ensuring the heat exchange capacity, it can also reduce energy waste and improve system energy efficiency.

[0127] The present invention proposes a compact distributed liquid-cooled CDU, which is also called a liquid-cooled distribution unit or a cold capacity distribution unit. An embodiment of the present invention is a drawer-type CDU, which is inserted into a liquid-cooled server cabinet. The CDU serves as a place for heat exchange between the server side (secondary side) and the cold source side (primary side), and mainly includes a heat exchanger, a secondary side liquid-cooled circulation pump, a circulation pump outlet check valve, a secondary side system flow regulating valve, a secondary side liquid replenishment tank and liquid replenishment pump, an expansion tank, an electric control box, a cooling fan, and temperature, humidity, pressure and other sensors.

[0128] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A liquid cooling distribution device, characterized in that: include: A heat exchanger (100), a first pump (71), a second pump (72), a secondary side liquid inlet (46), a secondary side liquid outlet (49), a primary side liquid inlet (48), a primary side liquid outlet (47) and a three-way regulating valve (93); the heat exchanger (100) has a first heat exchange pipe section (100a) and a second heat exchange pipe section (100b); the three-way regulating valve (93) has a first end (a), a second end (b) and a third end (c); the three-way regulating valve (93) has three states and can be switched between the three states: a first state: the first end (a) is connected to the second end (b) and the third end (c) is disconnected; a second state: the first end (a) is connected to the third end (c) and the second end (b) is disconnected; a third state: the first end (a) is connected to both the second end (b) and the third end (c); The secondary side liquid inlet (46) can be communicated with the first end (a) of the three-way regulating valve (93), one end of the first pump (71) can be communicated with the second end (b) of the three-way regulating valve (93), one end of the second pump (72) can be communicated with the third end (c) of the three-way regulating valve (93), the other end of the first pump (71) and the other end of the second pump (72) can both be communicated with one end of the first heat exchange pipe section (100a), and the other end of the first heat exchange pipe section (100a) can be communicated with the secondary side liquid outlet (49); The primary side liquid inlet (48) can be connected to one end of the second heat exchange pipe section (100b), and the other end of the second heat exchange pipe section (100b) can be connected to the primary side liquid outlet (47); The first heat exchange pipe section (100a) and the second heat exchange pipe section (100b) exchange heat, and only one of the first pump (71) and the second pump (72) is turned on, while the other is in a standby state; when the first pump (71) needs maintenance, the first end (a) of the three-way regulating valve (93) is connected to the third end (c), and the second end (b) is blocked, so that the first pump (71) is not connected and the second pump (72) is connected; when the second pump (72) needs maintenance, the first end (a) of the three-way regulating valve (93) is connected to the second end (b), and the third end (c) is blocked, so that the second pump (72) is not connected and the first pump (71) is connected; It also includes a proportional regulating valve, which can adjust the flow rate of the heat exchange fluid entering the first heat exchange pipe section (100a) and / or the second heat exchange pipe section (100b) according to the load of the liquid cooling distribution device.

2. The liquid cooling distribution device according to claim 1, characterized in that: The invention also comprises a first pipeline (101), a second pipeline (102), a third pipeline (103), a fourth pipeline (104), a fifth pipeline (105), a sixth pipeline (106), a seventh pipeline (107) and an eighth pipeline (108), wherein one end of the first pipeline (101) is in communication with the first end (a) of the three-way regulating valve (93), one end of the second pipeline (102) is in communication with the second end (b) of the three-way regulating valve (93), and the other end of the second pipeline (102) is in communication with one end of the first pump (71). The other end of the first pump (71) is connected to one end of the first heat exchange pipe section (100a) through the third pipe (103), the other end of the first heat exchange pipe section (100a) is connected to the secondary side liquid outlet (49) through the fourth pipe (104), the fifth pipe (105) connects one end of the second pump (72) to the third end (c) of the three-way regulating valve (93), and the sixth pipe (106) connects the other end of the second pump (72) to the third pipe (103); The primary side liquid inlet (48) is connected to one end of the second heat exchange pipe section (100b) through the seventh pipeline (107), and the other end of the second heat exchange pipe section (100b) is connected to the primary side liquid outlet (47) through the eighth pipeline (108); the proportional control valve is arranged on the eighth pipeline (108), and / or is arranged between the fourth pipeline (104) and the first pipeline (101).

3. The liquid cooling distribution device according to claim 2, characterized in that: The invention also comprises a ninth pipeline (109) and a tenth pipeline (110); the proportional regulating valve is a three-way proportional valve (90); the three-way proportional valve (90) comprises a fourth end (d), a fifth end (e) and a sixth end (f); the fifth end (e) can be communicated with the fourth end (d) and / or the sixth end (f); one end of the ninth pipeline (109) is communicated with the secondary side liquid inlet (46); the other end of the ninth pipeline (109) is communicated with the fourth end (d) of the three-way proportional valve (90); the other end of the first pipeline (101) is communicated with the fifth end (e) of the three-way proportional valve (90); one end of the tenth pipeline (110) is communicated with the sixth end (f) of the three-way proportional valve (90); and the other end of the tenth pipeline (110) is communicated with the fourth pipeline (104); The three-way proportional valve (90) is capable of regulating the flow rate from the sixth end (f) to the fifth end (e), thereby regulating the flow rate of the fluid flowing from the tenth pipeline (110) to the first pipeline (101); When the load of the liquid cooling distribution device is less than a first preset load, the flow rate from the sixth end (f) of the three-way proportional valve (90) to the fifth end (e) can be increased; when the load of the liquid cooling distribution device is greater than a second preset load, the flow rate from the sixth end (f) of the three-way proportional valve (90) to the fifth end (e) can be decreased, wherein the first preset load is less than or equal to the second preset load.

4. The liquid cooling distribution device according to claim 2, characterized in that: The proportional control valve is a two-way proportional valve (94), which is arranged on the eighth pipeline (108). The other end of the first pipeline (101) is connected to the secondary side liquid inlet (46). The two-way proportional valve (94) can adjust the flow rate of the fluid flowing from the eighth pipeline (108) to the primary side liquid outlet (47). When the load of the liquid cooling distribution device is less than a first preset load, the opening of the two-way proportional valve (94) can be reduced. When the load of the liquid cooling distribution device is greater than a second preset load, the opening of the two-way proportional valve (94) can be increased, wherein the first preset load is less than or equal to the second preset load.

5. The liquid cooling distribution device according to any one of claims 2 to 4, characterized in that: The invention also comprises a liquid replenishing tank (60) and a liquid replenishing pump (70), wherein the liquid replenishing tank (60) can be connected to the first pipeline (101) through an eleventh pipeline (111), and the liquid replenishing pump (70) is arranged on the eleventh pipeline (111); the liquid replenishing tank (60) is also respectively connected to a liquid discharge port (42) and a liquid replenishing port (43); It also includes an expansion tank (80) and a twelfth pipeline (112), wherein the expansion tank (80) is connected to the first pipeline (101) through the twelfth pipeline (112); The heat exchange pipe segment (100a) further comprises a first one-way valve (91) and a second one-way valve (92), wherein the first one-way valve (91) is arranged on the third pipeline (103) to only allow fluid to flow from the first pump (71) to the first heat exchange pipe segment (100a); and the second one-way valve (92) is arranged on the sixth pipeline (106) to only allow fluid to flow from the second pump (72) to the first heat exchange pipe segment (100a).

6. The liquid cooling distribution device according to any one of claims 1 to 5, characterized in that: It also includes a shell (200), the heat exchanger (100), the first pump (71) and the second pump (72) are all arranged inside the shell (200), and the secondary liquid inlet (46), the secondary liquid outlet (49), the primary liquid inlet (48) and the primary liquid outlet (47) are arranged outside the shell (200); The device also includes at least two fans, at least one of which is in operation and at least one is in standby mode.

7. The liquid cooling distribution device according to claim 6, characterized in that: It also includes an electrical box (55), the electrical box (55) is located in the housing (200), and a controller (56) is disposed inside the electrical box (55); The at least two fans include a first fan (51) and a second fan (52) arranged on one side of the electrical box (55), and a third fan (53) and a fourth fan (54) arranged on the other side of the electrical box (55). The first fan (51) and the third fan (53) form a first fan group, the second fan (52) and the fourth fan (54) form a second fan group, the first fan group forms a first wind path for driving airflow, the second fan group forms a second wind path for driving airflow, and only one fan in the first fan group is turned on and the other is in a standby state, and only one fan in the second fan group is turned on and the other is in a standby state.

8. The liquid cooling distribution device according to claim 7, characterized in that: The housing (200) comprises a front panel (10) and a rear panel (40) which are arranged opposite to each other; a first grille (14) and a second grille (15) are provided on the front panel (10); a third grille (50) is provided on the rear panel (40); the first grille (14) is arranged opposite to the first fan (51); the second grille (15) is arranged opposite to the second fan (52); the first grille (14) and the second grille (15) are air inlet grilles, and the third grille (50) is an air outlet grille; Parallel working mode: the first fan (51) and the second fan (52) are both running, while the third fan (53) and the fourth fan (54) are both in standby mode; Alternatively, the third fan (53) and the fourth fan (54) are both running, while the first fan (51) and the second fan (52) are both in a standby state; Cross-operation mode: the first fan (51) and the fourth fan (54) are both running, while the second fan (52) and the third fan (53) are both in standby mode; Alternatively, the second fan (52) and the third fan (53) are both running, while the first fan (51) and the fourth fan (54) are both in a standby state.

9. The liquid cooling distribution device according to claim 8, characterized in that: The front panel (10) is also provided with a display screen (11), a switch (12) and a communication interface (13), and the first grid (14) and the second grid (15) are symmetrically arranged relative to the display screen (11); The secondary liquid inlet (46), the secondary liquid outlet (49), the primary liquid inlet (48) and the primary liquid outlet (47) are all arranged on the rear panel (40); the secondary liquid inlet (46) and the secondary liquid outlet (49) are symmetrically arranged relative to the third grille (50); and the primary liquid inlet (48) and the primary liquid outlet (47) are symmetrically arranged relative to the third grille (50).

10. A cabinet heat exchange device, characterized in that: The invention comprises the liquid cooling distribution device according to any one of claims 1 to 9.

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