Cooling capacity distribution unit and cooling capacity control cabinet

Abstract

A cooling capacity distribution unit comprises a first pump, a second pump, a pump inlet pipeline, a pump outlet pipeline, a heat exchanger and a first backflow pipeline. The pump inlet line includes a first inlet end check valve, a first pump inlet tube, a second inlet end check valve, and a second pump inlet tube. The pump outlet pipeline comprises a first outlet end check valve, a first pump outlet pipe, a second outlet end check valve and a second pump outlet pipe. And the first pump outlet pipe and / or the second pump outlet pipe are / is connected with an inlet of the first heat exchanger. And the first return pipeline is connected with an outlet of the first heat exchanger. Compared with the prior art, parts can be maintained when a system runs. The utility model further discloses a cooling capacity control cabinet with the cooling capacity distribution unit.

Description

TECHNICAL FIELD

[0001] The utility model relates to a cold quantity distribution unit and cold quantity control cabinet belong to the technical field of immersion liquid cooling. BACKGROUND

[0002] With the continuous development of high-density business applications such as Internet of Things, artificial intelligence, virtual reality, smart city, etc., the data computing amount and computing complexity that data centers should deal with are rapidly increasing. In order to reconcile the rapidly growing computing power demand, the existing data center mainly realizes computing power upgrade by continuously increasing the single cabinet density, which makes the heat flow density and energy consumption of the data center continue to rise. In order to cope with the heat dissipation problem of high heat flow density computing power equipment, immersion liquid cooling technology as a new, efficient, green and energy-saving data center cooling solution, by immersing the heat generating equipment in the cooling liquid, the heat generating device is in direct contact with the cooling liquid, the heat generated is transmitted to the cooling liquid, and then the primary / secondary side circulation flow path fluid circuit isolated by the cooling distribution unit (CDU) is used for heat exchange, so that the heat is taken away, thereby forming a circulating and efficient cooling system.

[0003] The rack-mounted CDU is generally a cooling distribution unit installed in a standard rack, usually with a rack unit as a unit for size specification, which is convenient for installation in the rack of the data center. The rack-mounted CDU is generally suitable for small data centers, or scenes that need to deploy liquid cooling in limited space, and is designed to be more compact to occupy less room space.

[0004] The existing rack-mounted CDU is difficult to effectively improve the heat exchange performance due to space limitations, and the installation and maintenance operation is not convenient.

[0005] Therefore, it is necessary to improve the cooling distribution unit and the cold quantity control cabinet in the related technology. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a kind of cooling distribution unit and cold quantity control cabinet with higher maintainability.

[0007] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a kind of cooling distribution unit, is configured to dissipate heat for the equipment in immersion liquid cooling cabinet, the cooling distribution unit includes:

[0008] First pump, the first pump is equipped with first inlet and first outlet;

[0009] Second pump, the second pump is equipped with second inlet and second outlet;The first pump and the second pump are arranged in parallel;The first pump and / or the second pump is configured to pump out the first cooling liquid in the immersion liquid cooling cabinet;

[0010] a pump inlet line comprising a first inlet end check valve connected to a first inlet of the first pump, a first pump inlet pipe connected to the first inlet end check valve, a second inlet end check valve connected to a second inlet of the second pump, and a second pump inlet pipe connected to the second inlet end check valve;

[0011] a pump outlet line comprising a first outlet end check valve connected to a first outlet of the first pump, a first pump outlet pipe connected to the first outlet end check valve, a second outlet end check valve connected to a second outlet of the second pump, and a second pump outlet pipe connected to the second outlet end check valve;

[0012] a heat exchanger comprising a first heat exchanger inlet and a first heat exchanger outlet; the first pump outlet pipe and / or the second pump outlet pipe is connected to the first heat exchanger inlet;

[0013] a first return line connected to the first heat exchanger outlet; the first return line comprises a first main return pipe, a first branch return pipe connected to the first main return pipe, a second branch return pipe connected to the first main return pipe and in parallel to the first branch return pipe, and a second main return pipe connected to the first branch return pipe and the second branch return pipe.

[0014] As a further improved technical scheme of the present application, the pump inlet line further comprises at least one inlet line sensor for detecting the pump inlet line, and the pump outlet line further comprises at least one first outlet line sensor for detecting the pump outlet line.

[0015] As a further improved technical scheme of the present application, the first return line comprises at least one return line sensor; the first branch return pipe and the second branch return pipe are each provided with at least one control valve.

[0016] As a further improved technical scheme of the present application, the pump inlet line further comprises a main inlet pipe connecting the first pump inlet pipe and the second pump inlet pipe, and the main inlet pipe is configured to be in communication with the first cooling liquid in the immersion liquid cooling cabinet.

[0017] As a further improved technical scheme of the present application, the main inlet pipe comprises a first main inlet pipe and a second main inlet pipe connected to the first main inlet pipe.

[0018] The inlet line sensor comprises a first inlet main line sensor provided in the first main inlet pipe and a second inlet main line sensor provided in the second main inlet pipe.

[0019] As a further improved technical scheme of the utility model, the pump outlet pipeline comprises a main outlet pipe connecting the first pump outlet pipe and the second pump outlet pipe; the first outlet pipeline sensor is connected with the main outlet pipe.

[0020] As a further improved technical scheme of the utility model, the first branch return pipe is provided with a first control valve, a second control valve and a second filter connected between the first control valve and the second control valve; the control valve of the first branch return pipe comprises the first control valve and the second control valve.

[0021] As a further improved technical scheme of the utility model, the second branch return pipe is provided with a third control valve and a fourth control valve, and the control valve of the second branch return pipe comprises the third control valve and the fourth control valve.

[0022] As a further improved technical scheme of the utility model, the cold distribution unit comprises a primary side circulation flow path and a secondary side circulation flow path.

[0023] The heat exchanger comprises a second heat exchanger inlet and a second heat exchanger outlet.

[0024] The primary side circulation flow path comprises an outlet pipeline connected with the second heat exchanger inlet and a second return pipeline connected with the second heat exchanger outlet.

[0025] The secondary side circulation flow path comprises the first pump and / or the second pump, the pump inlet pipeline, the pump outlet pipeline and the first return pipeline.

[0026] The utility model also discloses a cold control cabinet, which comprises:

[0027] A cold distribution unit, which is the aforementioned cold distribution unit.

[0028] A cabinet body, which comprises a bottom plate and a plurality of side plates, and the first pump and the second pump are installed on the bottom plate; and

[0029] At least one walking wheel, which is installed at the bottom of the bottom plate.

[0030] Compared with the prior art, the cold distribution unit and the cold control cabinet of the utility model comprise the first pump and the second pump arranged in parallel, and are combined with the first inlet end check valve, the second inlet end check valve, the first outlet end check valve and the second outlet end check valve and other elements matched with the first pump and the second pump, so that the first pump or the second pump that may fail can be maintained or replaced without affecting the system operation. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is the working principle diagram of the cold quantity distribution unit of the utility model;

[0032] Figure 2 is the three-dimensional schematic diagram of the cold quantity control cabinet in one embodiment of the utility model;

[0033] Figure 3 is Figure 2 the partial three-dimensional exploded view, one side plate is separated out;

[0034] Figure 4 is Figure 3 the partial three-dimensional exploded view of another angle;

[0035] Figure 5 is the front view after one side plate in Figure 3 is removed;

[0036] Figure 6 is the three-dimensional schematic diagram of the cold quantity control cabinet of the utility model after removing several side plates and top plates;

[0037] Figure 7 is Figure 6 the front view;

[0038] Figure 8 is the three-dimensional schematic diagram of the cold quantity distribution unit in one embodiment of the utility model;

[0039] Figure 9 is Figure 8 the front view;

[0040] Figure 10 is Figure 8 the rear view;

[0041] Figure 11 is Figure 8 the left view;

[0042] Figure 12 is Figure 8 the right view;

[0043] Figure 13 is Figure 8 the top view;

[0044] Figure 14 is Figure 8 the bottom view. DETAILED DESCRIPTION

[0045] The exemplary embodiments of this application will be described in detail below with reference to the attached drawings. If there are several embodiments, the features in these embodiments can be combined with each other when there is no conflict. When the description refers to the drawings, the same numbers on different drawings represent the same or similar elements unless otherwise stated. The description in the following exemplary embodiments does not represent all the embodiments consistent with this application; rather, they are merely examples of devices, products and / or methods consistent with some aspects of this application as recited in the claims of this application.

[0046] The terms used in this application are merely for the purpose of describing the embodiments, and are not intended to limit the scope of protection of this application. The singular form "a", "an" or "the" used in the specification and claims of this application is also intended to include the plural form, unless the context clearly indicates otherwise.

[0047] It should be understood that the terms used in the specification and claims of this application, such as "first", "second" and similar terms, do not represent any order, number or importance, but are merely used to distinguish the features of the naming. Similarly, "one" or "a" and similar terms also do not represent a quantity limitation, but represent the existence of at least one. Unless otherwise indicated, the terms "before", "after", "upper", "lower" and similar terms appearing in this application are merely for the convenience of description, and are not limited to a certain position or a spatial orientation. The terms "include" or "contain" and similar terms are an open-ended expression, which means that the elements appearing before "include" or "contain" cover the elements appearing after "include" or "contain" and their equivalents, which does not exclude that the elements appearing before "include" or "contain" can also contain other elements. If "several" appears in this application, it means two and more than two.

[0048] Please refer to Figure 1As shown, the present invention discloses a cooling capacity distribution unit 100, which includes a primary-side circulation circuit and a secondary-side circulation circuit. The secondary-side circulation circuit includes a first pump 11, a second pump 12, a pump inlet pipe 2, a pump outlet pipe 3, a heat exchanger 4, a first return pipe 51, and an immersion liquid cooling cabinet 61. The primary-side circulation circuit includes a third pump 13, an outlet pipe 7 connected to the outlet of the third pump 13, a heat exchanger 4 connected to the outlet pipe 7, a second return pipe 52 connected to the inlet of the second pump 13, and a chiller 62. The immersion liquid cooling cabinet 61 houses a heat-generating device 611 that needs to dissipate heat and a first coolant 612 for soaking the heat-generating device 611. The heat-generating device 611 includes, but is not limited to, a server. The first coolant 612 includes, but is not limited to, water. The chiller 62 includes a second coolant 622, which includes, but is not limited to, water. The first coolant 612 of the primary-side circulation path and the second coolant 622 of the secondary-side circulation path perform heat exchange in the heat exchanger 4 to achieve temperature control.

[0049] The first pump 11 is provided with a first inlet 111 and a first outlet 112 .

[0050] The second pump 12 has a second inlet 121 and a second outlet 122. The first pump 11 and the second pump 12 are arranged in parallel to facilitate maintenance and replacement of one pump without affecting the operation of the entire system. Those skilled in the art will appreciate that the types of the first pump 11 and the second pump 12 can be flexibly selected from existing technologies as needed, and this disclosure will not be further elaborated upon.

[0051] The pump inlet pipeline 2 includes a first inlet end check valve 21 connected to the first inlet 111 of the first pump 11, a first pump inlet pipe 22 connected to the first inlet end check valve 21, a second inlet end check valve 23 connected to the second inlet 121 of the second pump 12, a second pump inlet pipe 24 connected to the second inlet end check valve 23, and at least one inlet pipeline sensor for detecting the pump inlet pipeline 2. Figure 1 As shown, the first inlet check valve 21 is detachably connected to the pump inlet pipe 2, wherein the two small black dots on both sides of the first inlet check valve 21 indicate that the position is detachably connected. Figure 1 The two small black dots on both sides of a component indicate that the position is detachably connected.

[0052] Specifically, in the embodiment illustrated in the utility model, the pump inlet pipeline 2 further comprises a main inlet pipe 25 connecting the first pump inlet pipe 22 and the second pump inlet pipe 24, the main inlet pipe 25 is configured to be in communication with the first cooling liquid 612 in the immersion liquid cooling cabinet 61, so that the high-temperature first cooling liquid 612 flows from the main inlet pipe 25 into the secondary side circulation flow path of the cold distribution unit 100 through the first pump 11 and / or the second pump 12.

[0053] In the embodiment illustrated in the utility model, the main inlet pipe 25 comprises a first main inlet pipe 251 and a second main inlet pipe 252 connected with the first main inlet pipe 251. The inlet pipe sensor comprises a first inlet main pipe sensor 261 arranged on the first main inlet pipe 251 and a second inlet main pipe sensor 262 arranged on the second main inlet pipe 252. In an embodiment of the utility model, the first inlet main pipe sensor 261 and the second inlet main pipe sensor 262 are both temperature and pressure integrated sensors. The temperature and pressure integrated sensor is redundantly designed, which can guarantee the reliability of detection and signal feedback under single fault condition. Of course, those skilled in the art can understand that the temperature and pressure integrated sensor can also be replaced by the cooperation of a temperature sensor and a pressure sensor.

[0054] In addition, the main inlet pipe 25 further comprises a first bypass pipe 27 connecting the first main inlet pipe 251 and the second main inlet pipe 252 and a first regulating valve 271 connected with the first bypass pipe 27. The first regulating valve 271 can be a manual butterfly valve. In an embodiment of the utility model, the first bypass pipe 27 is a first metal bellows (for example, a stainless steel bellows), which reduces the processing precision and difficulty and improves the flexibility of installation.

[0055] The first main inlet pipe 251 is further connected with a first manual butterfly valve 281, a second manual butterfly valve 282 and a first filter 283 (for example, a Y-type filter) connected between the first manual butterfly valve 281 and the second manual butterfly valve 282. Those skilled in the art can understand that by arranging the first manual butterfly valve 281 and the second manual butterfly valve 282, the first filter 283 can be maintained or replaced without affecting the operation of the system. When the first filter 283 is maintained or replaced, the first manual butterfly valve 281 and the second manual butterfly valve 282 are in a closed position (non-conducting position, the same below). At this time, the first regulating valve 271 is in an open position (conducting position, the same below). The cooling liquid can flow to the first inlet 111 of the first pump 11 and / or the second inlet 121 of the second pump 12 through the first bypass pipe 27. Usually, the first regulating valve 271 is in a closed position, the first manual butterfly valve 281 and the second manual butterfly valve 282 are in an open position, and the cooling liquid flows from the first manual butterfly valve 281, the first filter 283 and the second manual butterfly valve 282 to the first inlet 111 of the first pump 11 and / or the second inlet 121 of the second pump 12. The second inlet main pipe line sensor 262 connected downstream of the first filter 283 in the flow direction of the cooling liquid can detect the system pressure, and when the system pressure exceeds the set value, a signal will be sent to remind that the first filter 283 may need to be maintained or replaced due to blockage.

[0056] The pump outlet pipe 3 comprises a first outlet end check valve 31 connected with the first outlet 112 of the first pump 11, a first pump outlet pipe 32 connected with the first outlet end check valve 31, a second outlet end check valve 33 connected with the second outlet 122 of the second pump 12, a second pump outlet pipe 34 connected with the second outlet end check valve 33, a first one-way valve 35 connected downstream of the first outlet 112 of the first pump 11 and the second outlet 122 of the second pump 12, and at least one first outlet pipe line sensor 36 for detecting the pump outlet pipe 3. In an embodiment of the present application, the first outlet pipe line sensor 36 is a temperature and pressure integrated sensor.

[0057] As can be understood by those skilled in the art, by closing the first inlet check valve 21 and the first outlet check valve 31, the first pump 11 connected between the first inlet check valve 21 and the first outlet check valve 31 can be maintained or replaced. Similarly, by closing the second inlet check valve 23 and the second outlet check valve 33, the second pump 12 connected between the second inlet check valve 23 and the second outlet check valve 33 can be maintained or replaced.

[0058] The heat exchanger 4 comprises a first heat exchanger inlet 41, a first heat exchanger outlet 42, a second heat exchanger inlet 43 and a second heat exchanger outlet 44. The first heat exchanger inlet 41 and the first heat exchanger outlet 42 are located on the same side of the heat exchanger 4 and are in communication with each other; the second heat exchanger inlet 43 and the second heat exchanger outlet 44 are located on the same side of the heat exchanger 4 and are in communication with each other. The first pump outlet pipe 32 and / or the second pump outlet pipe 34 are connected to the first heat exchanger inlet 41.

[0059] In an embodiment of the present application, the heat exchanger 4 is a double-channel plate heat exchanger, wherein the first heat exchanger inlet 41 and the first heat exchanger outlet 42 are connected to one flow channel of the double-channel plate heat exchanger; the second heat exchanger inlet 43 and the second heat exchanger outlet 44 are connected to another flow channel of the double-channel plate heat exchanger.

[0060] Specifically, in the embodiment shown in the present application, the pump outlet pipeline 3 comprises a main outlet pipe 37 connecting the first pump outlet pipe 32 and the second pump outlet pipe 34. The first check valve 35 and the first outlet pipeline sensor 36 are connected to the main outlet pipe 37. The first check valve 35 is used to prevent the first cooling liquid 612 from being sucked back into the first pump 11 and / or the second pump. The pump outlet pipeline 3 further comprises a second metal bellow 38 connecting the main outlet pipe 37 and the first heat exchanger inlet 41. The provision of the second metal bellow 38 facilitates the flexibility of pipeline installation.

[0061] One end of the first return pipeline 51 is connected to the first heat exchanger outlet 42, and the other end of the first return pipeline 51 is configured to be connected to the immersion liquid cooling cabinet 61, so as to return the cooled first cooling liquid 612 to the immersion liquid cooling cabinet 61.

[0062] In the embodiment shown in the utility model, the first return pipeline 51 comprises a first main return pipeline 510, a first branch return pipeline 511 connected with the first main return pipeline 510, a second branch return pipeline 512 connected with the first main return pipeline 510 and in parallel with the first branch return pipeline 511, a second main return pipeline 513 connected with the first branch return pipeline 511 and the second branch return pipeline 512, and a return pipeline sensor.

[0063] The first return pipeline 51 further comprises a second regulating valve 5141 connected with the first main return pipeline 510 and close to the first heat exchanger outlet 42, and a pressure regulating device 5142 connected with the second regulating valve 5141. The second regulating valve 5141 can be a manual butterfly valve. The pressure regulating device 5142 comprises but is not limited to an expansion tank, and is used to compensate the volume change of the first cooling liquid 612 when the temperature changes, to prevent the system pressure from being too high.

[0064] The first main return pipeline 510 further comprises a third metal bellows 5101 and a first return pipeline sensor 5102 connected downstream of the third metal bellows 5101. The first return pipeline sensor 5102 is a temperature and pressure integrated sensor. The return pipeline sensor comprises the first return pipeline sensor 5102.

[0065] The first branch return pipeline 511 is provided with a first control valve 5111, a second control valve 5112 and a second filter 5113 (for example, a Y-type filter) connected between the first control valve 5111 and the second control valve 5112. Those skilled in the art can understand that by providing the first control valve 5111 and the second control valve 5112, the second filter 5113 can be maintained or replaced without affecting the operation of the system. In an embodiment of the utility model, the first control valve 5111 and the second control valve 5112 are both manual butterfly valves.

[0066] The second branch return pipeline 512 is provided with a third control valve 5121 and a fourth control valve 5122. In an embodiment of the utility model, the third control valve 5121 and the fourth control valve 5122 are both manual butterfly valves.

[0067] The second main return pipe 513 is provided with a fifth control valve 5131, a sixth control valve 5132, a first flow device 5133 connected between the fifth control valve 5131 and the sixth control valve 5132, and a second return pipe line sensor 5134. The first flow device 5133 is a flow meter or a flow sensor. The second return pipe line sensor 5134 is a temperature and pressure integrated sensor. The return pipe line sensor includes the second return pipe line sensor 5134.

[0068] The outlet pipe 7 includes a first regulating valve 71, a second outlet pipe line sensor 72 connected downstream of the first regulating valve 71, a three-way electric valve 73 connected downstream of the second outlet pipe line sensor 72, and a second flow device 74 connected between the three-way electric valve 73 and the second heat exchanger inlet 43. In an embodiment of the present application, the first regulating valve 71 can be a manual butterfly valve. The second outlet pipe line sensor 72 is a temperature and pressure integrated sensor. The second flow device 74 is a flow meter or a flow sensor.

[0069] The second return pipe line 52 includes a third return pipe line sensor 521, a second one-way valve 522 connected downstream of the third return pipe line sensor 521, and a second regulating valve 523 connected downstream of the second one-way valve 522. In an embodiment of the present application, the third return pipe line sensor 521 is a temperature and pressure integrated sensor, and the second regulating valve 523 can be a manual butterfly valve.

[0070] The primary side circulation flow path further includes a second bypass pipe 8 connected between the three-way electric valve 73 and the second return pipe line 52. The three-way electric valve 73 can control whether the second bypass pipe 8 is conducted. In an embodiment of the present application, the second bypass pipe 8 is a fourth metal bellows (for example, a stainless steel bellows), which reduces the processing precision and difficulty and improves the flexibility of installation.

[0071] Please refer to Figures 2 to 14 The utility model also discloses a cold energy control cabinet 200, which comprises a cold energy distribution unit 100 and a cabinet body 300. Figures 2 to 14 The specific structure of the cold energy distribution unit 100 disclosed in the specification is made according to the principle of the cold energy distribution unit 100 shown in the specification. Figure 1 Of course, those skilled in the art can understand that the specific structure of the cold energy distribution unit 100 disclosed in the specification does not necessarily have to be made according to the principle of the cold energy distribution unit 100 shown in the specification. Figures 2 to 14 Of course, those skilled in the art can understand that the specific structure of the cold energy distribution unit 100 disclosed in the specification does not necessarily have to be made according to the principle of the cold energy distribution unit 100 shown in the specification. Figure 1The installation positions of the various elements shown in the principle of the cold distribution unit 100 shown are completely the same. For example, the installation positions of some sensors in the pipeline can be flexibly adjusted as needed, and are not necessarily fixed at a certain position. The cabinet 300 includes a bottom plate 301, a plurality of side plates 302, and a top plate 303. The first pump 11 and the second pump 12 are installed on the bottom plate 301 for easy installation and maintenance. The cabinet 300 is also provided with a strong power distribution box 304 and a weak power distribution box 305, wherein the strong power distribution box 304 and the weak power distribution box 305 are located in the upper middle part of the cabinet 300, and the strong power distribution box 304 is located below the top plate 303, and the weak power distribution box 305 is located on the inner wall of one of the side plates 302. The strong power distribution box 304 and the weak power distribution box 305 of the utility model are independently arranged and separated from the fluid pipeline system, which is beneficial to avoid interference failure. Of course, those skilled in the art can understand that the cold control cabinet 200 also includes other elements such as switches.

[0072] In addition, in the embodiment shown in the utility model, the cold control cabinet 200 also includes at least one walking wheel 306 installed at the bottom of the bottom plate 301, so as to facilitate the movement of the cold control cabinet 200.

[0073] Compared with the prior art, the cold distribution unit 100 and the cold control cabinet 200 of the utility model include the first pump 11 and the second pump 12 arranged in parallel, and the first inlet check valve 21, the second inlet check valve 23, the first outlet check valve 31, and the second outlet check valve 33 cooperating with the first pump 11 and the second pump 12, which can realize maintenance or replacement of the first pump 11 or the second pump 12 that may fail without affecting the operation of the system. In addition, the utility model is provided with a first inlet main pipeline sensor 261, a second inlet main pipeline sensor 262, a first outlet pipeline sensor 36, a second outlet pipeline sensor 72, a first return pipeline sensor 5102, and a second return pipeline sensor 521, which can monitor the refrigerating capacity, flow, pressure, and temperature of the related pipeline, and is beneficial to the maintenance of the pipeline that may fail.

[0074] In addition, in order to cope with the overall cooling of the equipment in the entire immersion cabinet, the cold distribution unit 100 and the cold control cabinet 200 of the utility model can more directly provide independent cooling for each cabinet, and realize more uniform and comprehensive cooling effect.

[0075] The above implementation manners are only used for illustrating the technical scheme described in the utility model and not for limiting the utility model, and the understanding of the utility model should be based on the technicians in the technical field, although the utility model has been described in detail in the specification by referring to the above implementation manners, however, the ordinary technicians in the field should understand that the technicians in the technical field can still modify or equivalently replace the utility model, and all the technical schemes and improvements which do not deviate from the spirit and range of the utility model should be covered in the claim range of the utility model.

Claims

1. A cooling distribution unit configured to dissipate heat from equipment in an immersion liquid cooling cabinet, characterized in that: The cold distribution unit comprises: a first pump provided with a first inlet and a first outlet; a second pump provided with a second inlet and a second outlet; the first pump and the second pump are arranged in parallel; the first pump and / or the second pump are configured to draw out the first cooling liquid in the immersion liquid cooling cabinet; a pump inlet pipeline comprising a first inlet end check valve connected with the first inlet of the first pump, a first pump inlet pipe connected with the first inlet end check valve, a second inlet end check valve connected with the second inlet of the second pump, and a second pump inlet pipe connected with the second inlet end check valve; a pump outlet pipeline comprising a first outlet end check valve connected with the first outlet of the first pump, a first pump outlet pipe connected with the first outlet end check valve, a second outlet end check valve connected with the second outlet of the second pump, and a second pump outlet pipe connected with the second outlet end check valve; a heat exchanger comprising a first heat exchanger inlet and a first heat exchanger outlet; the first pump outlet pipe and / or the second pump outlet pipe are connected with the first heat exchanger inlet; a first return pipeline connected with the first heat exchanger outlet; the first return pipeline comprises a first main return pipe, a first branch return pipe connected with the first main return pipe, a second branch return pipe connected with the first main return pipe and in parallel with the first branch return pipe, and a second main return pipe connected with the first branch return pipe and the second branch return pipe.

2. The cold allocation unit of claim 1, wherein: The pump inlet pipeline further comprises at least one inlet pipeline sensor for detecting the pump inlet pipeline, and the pump outlet pipeline further comprises at least one first outlet pipeline sensor for detecting the pump outlet pipeline.

3. The cold allocation unit of claim 1, wherein: The first return pipeline comprises at least one return pipeline sensor; the first branch return pipe and the second branch return pipe are respectively provided with at least one control valve.

4. The cold allocation unit of claim 2, wherein: The pump inlet pipeline further comprises a main inlet pipe connecting the first pump inlet pipe and the second pump inlet pipe, and the main inlet pipe is configured to be in communication with the first cooling liquid in the immersion liquid cooling cabinet.

5. The cold allocation unit of claim 4, wherein: The main inlet pipe comprises a first main inlet pipe and a second main inlet pipe connected with the first main inlet pipe; The inlet pipeline sensor comprises a first inlet main pipeline sensor arranged in the first main inlet pipe and a second inlet main pipeline sensor arranged in the second main inlet pipe.

6. The cold allocation unit of claim 2, wherein: The pump outlet pipeline comprises a main outlet pipe connecting the first pump outlet pipe and the second pump outlet pipe; the first outlet pipeline sensor is connected with the main outlet pipe.

7. The cold allocation unit of claim 3, wherein: The first branch return pipe is provided with a first control valve, a second control valve, and a second filter connected between the first control valve and the second control valve; the control valves of the first branch return pipe comprise the first control valve and the second control valve.

8. The cold allocation unit of claim 3, wherein: The second branch return pipe is provided with a third control valve and a fourth control valve; the control valves of the second branch return pipe comprise the third control valve and the fourth control valve.

9. The cold allocation unit of claim 1, wherein: The cold distribution unit comprises a primary side circulation flow path and a secondary side circulation flow path; The heat exchanger comprises a second heat exchanger inlet and a second heat exchanger outlet; The primary side circulation flow path comprises an outlet pipe connected to the second heat exchanger inlet and a second return pipe connected to the second heat exchanger outlet; The secondary side circulation flow path comprises the first pump and / or the second pump, the pump inlet pipe, the pump outlet pipe and the first return pipe.

10. A cold charge control cabinet characterized by, Comprise: A cold distribution unit as claimed in any one of claims 1 to 9; A cabinet body comprising a bottom plate and a plurality of side plates, the first pump and the second pump being installed on the bottom plate; and At least one walking wheel installed at the bottom of the bottom plate. ​

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