Large-cooling-capacity rack type CDU

Abstract

The invention provides a large-cooling-capacity rack-mounted CDU, which relates to the field of heat exchangers and comprises a primary flow path, a secondary flow path, a heat exchanger, two pumps, a frame body, a valve block and an electrical control assembly, through reasonable layout of the primary flow path, the secondary flow path, the heat exchanger, the two pumps, the frame body, the valve block and the electrical control assembly in the rectangular storage area of the frame body, the problem that an existing CDU is poor in refrigeration effect is solved, selection of the pump with the larger size and the heat exchanger with the larger size is achieved in the limited cabinet space, and the cost is reduced. Therefore, a better refrigeration effect on the server is achieved through larger flow and a better cooling effect.

Description

Technical Field

[0001] The present invention relates to the field of heat exchangers, and particularly to a large-cooling-capacity rack-mounted CDU. Background Art

[0002] During the operation of a data center, efficient heat dissipation is a key factor in ensuring the stable operation of equipment. The Coolant Distribution Unit (CDU), as the core equipment of the data center heat dissipation system, directly affects the operation efficiency and stability of the data center.

[0003] In the prior art, for example, the refrigerant circulation device disclosed in Chinese Patent Application No. 202410891178.3 is a typical CDU. This patent details the specific structure and working principle of such a CDU. However, limited by the standard cabinet size, in a limited cabinet space of 900 mm in length, 480 mm in width, and 177 mm in height, the single-pump flow rate of the traditional CDU can only reach 40 L / min. Under the working condition where the primary-side inlet liquid temperature is 32 °C and the secondary-side supply liquid temperature is 40 °C, that is, a temperature difference of 8 degrees, the cooling capacity is only 80 kW. This is mainly because the heat exchanger in the existing CDU is relatively small and cannot provide a large enough heat exchange area, resulting in limited heat transfer efficiency between the primary refrigerant and the secondary refrigerant; at the same time, the pump specification is also relatively small, and its ability to transport the refrigerant is limited, leading to a low refrigeration cycle efficiency of the overall system.

[0004] In addition, due to the relatively small sizes of the heat exchanger and the pump in the existing CDU, its internal layout is relatively simple. Although this simple layout reduces the complexity of design and manufacturing to a certain extent, it also limits the space for improving the equipment performance. With the continuous expansion of the data center scale and the continuous improvement of server performance, the heat generated by the data center has increased sharply, and the demand for cooling capacity has also been growing. However, currently, with the standard cabinet size unchanged, the refrigeration capacity of the existing CDU is difficult to meet the actual needs. Summary of the Invention

[0005] In view of the above technical problems, the large-cooling-capacity rack-mounted CDU provided by the present invention can achieve better refrigeration effects in a limited cabinet space.

[0006] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] The large-cooling-capacity rack-mounted CDU provided by the present invention includes a primary flow path, a secondary flow path, a heat exchanger, two pumps, a housing, a valve block, and an electrical control assembly; the primary flow path is the flow path of the primary refrigerant; the secondary flow path is the flow path of the secondary refrigerant; the heat exchanger is connected to the primary flow path and the secondary flow path; the pump is connected to the secondary flow path; the housing has a storage area; the storage area is a rectangular space; the storage area has a length, a width, and a height; the length of the storage area extends in the left-right direction; the width of the storage area extends in the front-back direction; the height of the storage area extends in the up-down direction; the pump is arranged on the left side of the valve block; the two pumps are arranged adjacent to each other in the front-back direction; the valve block is arranged on the left side of the heat exchanger; the rear end of the pump located at the rear side is flush with the rear end of the heat exchanger; the valve block includes two pump inlet connection ports, two pump outlet connection ports, a liquid outlet, and a liquid inlet; the two pump inlet connection ports are communicated with the liquid inlet; the two pump outlet connection ports are communicated with the liquid outlet; the pump inlet connection ports and the pump outlet connection ports are opened on the left side of the valve block; the liquid outlet and the liquid inlet are opened on the right side of the valve block; a check valve is arranged on the pipeline from the pump outlet connection port to the liquid outlet; the inlet and the outlet of the pump are respectively communicated with one of the pump inlet connection ports and the pump outlet connection ports; the heat exchanger has an inlet A, an inlet B, an outlet A, and an outlet B; the inlet A and the outlet A are the inlet and the outlet of the primary flow path in the heat exchanger, and the inlet B and the outlet B are the inlet and the outlet of the secondary flow path in the heat exchanger; the outlet B is above the inlet A; the inlet B is above the outlet A; the outlet B is on the left side of the inlet B; the inlet A is on the left side of the outlet A; the primary flow path includes a primary-side inlet pipeline and a primary-side outlet pipeline; one end of the primary-side inlet pipeline is communicated with the inlet A, and the other end is communicated to the outside of the right side of the housing; one end of the primary-side outlet pipeline is communicated with the outlet A, and the other end is communicated to the outside of the right side of the housing; the secondary flow path includes a secondary-side outlet pipeline, a secondary-side inlet pipeline A, and a secondary-side inlet pipeline B; one end of the secondary-side outlet pipeline is communicated with the liquid outlet, and the other end is communicated to the outside of the right side of the housing; one end of the secondary-side inlet pipeline B is communicated with the liquid inlet, and the other end is communicated with the outlet B; one end of the secondary-side inlet pipeline A is communicated with the inlet B, and the other end is communicated to the outside of the right side of the housing; the primary-side inlet pipeline, the primary-side outlet pipeline, the secondary-side inlet pipeline A, the secondary-side inlet pipeline B, and the secondary-side outlet pipeline all extend in the horizontal direction; the primary-side inlet pipeline, the primary-side outlet pipeline, the secondary-side inlet pipeline A, the secondary-side inlet pipeline B, and the secondary-side outlet pipeline are all arranged on the right side of the valve block; the primary-side inlet pipeline, the primary-side outlet pipeline, the secondary-side inlet pipeline A, the secondary-side inlet pipeline B, and the secondary-side outlet pipeline are all arranged in front of the heat exchanger;The primary side inlet pipeline and the primary side outlet pipeline are arranged below the secondary side inlet pipeline A and the secondary side inlet pipeline B; the secondary side outlet pipeline is arranged above the secondary side inlet pipeline A and the secondary side inlet pipeline B; the electrical control assembly is arranged in front of the pump.

[0008] The large cooling capacity rack-mounted CDU provided by the present invention preferably further includes a power module assembly; the power module assembly is arranged in front of the heat exchanger; the power module assembly is arranged on the right side of the electrical control assembly.

[0009] The large cooling capacity rack-mounted CDU provided by the present invention preferably further includes an expansion tank; the expansion tank is arranged in front of the valve block; an expansion tank connection hole is opened on the valve block; the expansion tank connection hole is communicated with the liquid outlet; the expansion tank is communicated with the expansion tank connection hole.

[0010] The large cooling capacity rack-mounted CDU provided by the present invention preferably, the primary side inlet pipeline includes a primary side inlet main pipe and a primary side inlet bypass pipe; the primary side inlet main pipe and the primary side inlet bypass pipe share the inlet and outlet of the primary side inlet pipeline; a first control ball valve is arranged on the primary side inlet main pipe; the first control ball valve can control the flow rate of the primary side inlet main pipe; the electric actuator of the first control ball valve is arranged above the primary side inlet main pipe; a second control ball valve is arranged on the primary side inlet bypass pipe; the second control ball valve can control the flow rate of the primary side inlet bypass pipe; the electric actuator of the second control ball valve is arranged above the primary side inlet bypass pipe; the electric actuators of the first control ball valve and the second control ball valve are both arranged in front of the secondary side outlet pipeline.

[0011] The large cooling capacity rack-mounted CDU provided by the present invention preferably, a flow meter is arranged on the secondary side outlet pipeline.

[0012] The large cooling capacity rack-mounted CDU provided by the present invention preferably, the flow meter is an ultrasonic flow meter.

[0013] The large cooling capacity rack-mounted CDU provided by the present invention preferably, the left side of the frame is a cover plate; a plurality of heat dissipation holes are opened on the cover plate; a touch screen is fixed on the cover plate; the touch screen is fixed on the left side of the electrical control assembly.

[0014] The large cooling capacity rack-mounted CDU provided by the present invention preferably, the inlet of the pump is connected to the pump inlet connection port through a blind plug connector; the outlet of the pump is connected to the pump outlet connection port through a blind plug connector.

[0015] The large cooling capacity rack-mounted CDU provided by the present invention, preferably, one of the secondary side outlet pipeline, the secondary side inlet pipeline A, and the secondary side inlet pipeline B is further connected with a liquid supplement pipe; the liquid supplement port of the liquid supplement pipe is communicated to the outside of the frame body.

[0016] The large cooling capacity rack-mounted CDU provided by the present invention, preferably, the left ends of the electrical control assembly and the pump are flush.

[0017] The above technical solution has the following advantages or beneficial effects:

[0018] The present invention provides a large-cooling-capacity rack-mounted CDU, which relates to the field of heat exchangers and includes a primary flow path, a secondary flow path, a heat exchanger, two pumps, a frame body, a valve block, and an electrical control assembly; the primary flow path is the flow path of the primary refrigerant; the secondary flow path is the flow path of the secondary refrigerant; the heat exchanger is connected to the primary flow path and the secondary flow path; the pumps are connected to the secondary flow path; the frame body has a storage area; the storage area is a rectangular space; the storage area has a length, a width, and a height; the length of the storage area extends in the left-right direction; the width of the storage area extends in the front-back direction; the height of the storage area extends in the up-down direction; the pumps are arranged on the left side of the valve block; the two pumps are arranged adjacent to each other in the front-back direction; the valve block is arranged on the left side of the heat exchanger; the rear end of the pump located at the rear is flush with the rear end of the heat exchanger; the valve block includes two pump inlet connection ports, two pump outlet connection ports, a liquid outlet, and a liquid inlet; the two pump inlet connection ports are communicated with the liquid inlet; the two pump outlet connection ports are communicated with the liquid outlet; the pump inlet connection ports and the pump outlet connection ports are opened on the left side of the valve block; the liquid outlet and the liquid inlet are opened on the right side of the valve block; a check valve is arranged on the pipeline from the pump outlet connection port to the liquid outlet; the inlet and the outlet of the pump are respectively communicated with one of the pump inlet connection ports and the pump outlet connection ports; the heat exchanger has an inlet A, an inlet B, an outlet A, and an outlet B; the inlet A and the outlet A are the inlet and the outlet of the primary flow path in the heat exchanger, and the inlet B and the outlet B are the inlet and the outlet of the secondary flow path in the heat exchanger; the outlet B is above the inlet A; the inlet B is above the outlet A; the outlet B is on the left side of the inlet B; the inlet A is on the left side of the outlet A; the primary flow path includes a primary side inlet pipeline and a primary side outlet pipeline; one end of the primary side inlet pipeline is communicated with the inlet A, and the other end is communicated to the outside of the right side of the frame body; one end of the primary side outlet pipeline is communicated with the outlet A, and the other end is communicated to the outside of the right side of the frame body; the secondary flow path includes a secondary side outlet pipeline, a secondary side inlet pipeline A, and a secondary side inlet pipeline B; one end of the secondary side outlet pipeline is communicated with the liquid outlet, and the other end is communicated to the outside of the right side of the frame body; one end of the secondary side inlet pipeline B is communicated with the liquid inlet, and the other end is communicated with the outlet B; one end of the secondary side inlet pipeline A is communicated with the inlet B, and the other end is communicated to the outside of the right side of the frame body; the primary side inlet pipeline, the primary side outlet pipeline, the secondary side inlet pipeline A, the secondary side inlet pipeline B, and the secondary side outlet pipeline all extend in the horizontal direction; the primary side inlet pipeline, the primary side outlet pipeline, the secondary side inlet pipeline A, the secondary side inlet pipeline B, and the secondary side outlet pipeline are all arranged on the right side of the valve block; the primary side inlet pipeline, the primary side outlet pipeline, the secondary side inlet pipeline A, the secondary side inlet pipeline B, and the secondary side outlet pipeline are all arranged in front of the heat exchanger;The primary side inlet pipeline and the primary side outlet pipeline are arranged below the secondary side inlet pipeline A and the secondary side inlet pipeline B; the secondary side outlet pipeline is arranged above the secondary side inlet pipeline A and the secondary side inlet pipeline B; the electrical control assembly is arranged in front of the pump. The large cooling capacity rack-mounted CDU provided by the present invention solves the problem of poor refrigeration effect of the existing CDU and can achieve better refrigeration effect in a limited cabinet space. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, the present invention and its features, shapes and advantages will become more obvious. The same reference numerals indicate the same parts in all the drawings. The drawings are not deliberately drawn to scale, and the emphasis is on showing the gist of the present invention.

[0020] Figure 1 It is a schematic diagram of the overall structure of the large cooling capacity rack-mounted CDU provided in Embodiment 1 of the present invention.

[0021] Figure 2 It is a top view of the structural layout in the storage area of the large cooling capacity rack-mounted CDU provided in Embodiment 1 of the present invention.

[0022] Figure 3 It is a partial structural schematic diagram of the large cooling capacity rack-mounted CDU provided in Embodiment 1 of the present invention with the secondary outlet pipeline hidden.

[0023] Figure 4 It is a schematic diagram of the positional relationship between the primary side inlet main pipe and the primary side inlet bypass pipe of the large cooling capacity rack-mounted CDU provided in Embodiment 1 of the present invention.

[0024] Figure 5 It is a schematic diagram of the heat exchanger structure of the large cooling capacity rack-mounted CDU provided in Embodiment 1 of the present invention.

[0025] Figure 6 It is a schematic diagram of the left side structure of the valve block of the large cooling capacity rack-mounted CDU provided in Embodiment 1 of the present invention.

[0026] Figure 7 It is a schematic diagram of the right side structure of the valve block of the large cooling capacity rack-mounted CDU provided in Embodiment 1 of the present invention.

[0027] Figure 8 It is a schematic diagram of the structure at the cover plate of the large cooling capacity rack-mounted CDU provided in Embodiment 1 of the present invention.

[0028] Figure 9 It is a schematic diagram of the structure of the large cooling capacity rack-mounted CDU provided in Embodiment 1 of the present invention after being equipped with a liquid replenishing pipe.

[0029] Figure 10It is a schematic diagram of the position of the liquid replenishing pipe after the large-cooling-capacity rack-mounted CDU provided in Embodiment 1 of the present invention is equipped with a liquid replenishing pipe. Detailed implementation manners

[0030] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. It should be noted that the terms used in the present invention are only for describing specific implementation manners and are not intended to limit the exemplary implementation manners according to the present application.

[0031] The technical solutions in the embodiments of the present invention will be described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Therefore, the detailed descriptions of the embodiments of the present invention provided in the following drawings are not intended to limit the scope of the claimed invention, but only represent the selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] Embodiment 1:

[0033] The large-cooling-capacity rack-mounted CDU provided in Embodiment 1 of the present invention, as Figures 1 to 10As shown in the figure, it includes a primary flow path 1, a secondary flow path 2, a heat exchanger 3, two pumps 4, a housing 5, a valve block 6, an electrical control assembly 7 and a power module assembly 9; the primary flow path 1 is the flow path of the primary refrigerant; the secondary flow path 2 is the flow path of the secondary refrigerant; the heat exchanger 3 is connected to the primary flow path 1 and the secondary flow path 2; the pump 4 is connected to the secondary flow path 2; the housing 5 has a storage area 51; the storage area 51 is a rectangular space; the storage area 51 has a length, a width and a height; the length of the storage area 51 extends in the left-right direction; the width of the storage area 51 extends in the front-back direction; the height of the storage area 51 extends in the up-down direction; the pump 4 is arranged on the left side of the valve block 6; the two pumps 4 are arranged adjacent to each other in the front-back direction; the valve block 6 is arranged on the left side of the heat exchanger 3; the rear ends of the pump 4 at the rear side and the rear end of the heat exchanger 3 are flush; the valve block 6 includes two pump inlet connection ports 61, two pump outlet connection ports 62, a liquid outlet 63 and a liquid inlet 64; the two pump inlet connection ports 61 are communicated with the liquid inlet 64; the two pump outlet connection ports 62 are communicated with the liquid outlet 63; the pump inlet connection ports 61 and the pump outlet connection ports 62 are opened on the left side of the valve block 6; the liquid outlet 63 and the liquid inlet 64 are opened on the right side of the valve block 6; the inlet and outlet of the pump 4 are respectively communicated with a pump inlet connection port 61 and a pump outlet connection port 62; the heat exchanger 3 has an inlet A31, an inlet B32, an outlet A33 and an outlet B34; the inlet A31 and the outlet A33 are the inlet and outlet of the primary flow path 1 in the heat exchanger 3, and the inlet B32 and the outlet B34 are the inlet and outlet of the secondary flow path 2 in the heat exchanger 3; the outlet B34 is above the inlet A31; the inlet B32 is above the outlet A33; the outlet B34 is on the left side of the inlet B32; the inlet A31 is on the left side of the outlet A33; the primary flow path 1 includes a primary side inlet pipeline 11 and a primary side outlet pipeline 12; one end of the primary side inlet pipeline 11 is communicated with the inlet A31, and the other end is communicated to the outside of the right side of the housing 5; the primary side inlet pipeline 11 includes a primary side inlet main pipe 111 and a primary side inlet bypass pipe 112; the primary side inlet main pipe 111 and the primary side inlet bypass pipe 112 share the inlet and outlet of the primary side inlet pipeline 11; a first control ball valve 1111 is arranged on the primary side inlet main pipe 111; the first control ball valve 1111 can control the flow rate of the primary side inlet main pipe 111; the electric actuator of the first control ball valve 1111 is arranged above the primary side inlet main pipe 111; a second control ball valve 1121 is arranged on the primary side inlet bypass pipe 112; the second control ball valve 1121 can control the flow rate of the primary side inlet bypass pipe 112; the electric actuator of the second control ball valve 1121 is arranged above the primary side inlet bypass pipe 112; the electric actuators of the first control ball valve 1111 and the second control ball valve 1121 are both arranged in front of the secondary side outlet pipeline 21; one end of the primary side outlet pipeline 12 is communicated with the outlet A33, and the other end is communicated to the outside of the right side of the housing 5; the secondary flow path 2 includes a secondary side outlet pipeline 21, a secondary side inlet pipeline A22 and a secondary side inlet pipeline B23;One end of the secondary side outlet pipe 21 communicates with the liquid outlet 63, and the other end communicates with the outside of the right side of the frame body 5; a flow meter 211 is arranged on the secondary side outlet pipe 21; the electric actuator of the flow meter 211 is arranged on the right side of the secondary side inlet pipe B23; one end of the secondary side inlet pipe B23 communicates with the liquid inlet 64, and the other end communicates with the outlet B34; one end of the secondary side inlet pipe A22 communicates with the inlet B32, and the other end communicates with the outside of the right side of the frame body 5; the primary side inlet pipe 11, the primary side outlet pipe 12, the secondary side inlet pipe A22, the secondary side inlet pipe B23, and the secondary side outlet pipe 21 all extend in the horizontal direction; the primary side inlet pipe 11, the primary side outlet pipe 12, the secondary side inlet pipe A22, the secondary side inlet pipe B23, and the secondary side outlet pipe 21 are all arranged on the right side of the valve block 6; the primary side inlet pipe 11, the primary side outlet pipe 12, the secondary side inlet pipe A22, the secondary side inlet pipe B23, and the secondary side outlet pipe 21 are all arranged in front of the heat exchanger 3; the primary side inlet pipe 11 and the primary side outlet pipe 12 are arranged below the secondary side inlet pipe A22 and the secondary side inlet pipe B23; the secondary side outlet pipe 21 is arranged above the secondary side inlet pipe A22 and the secondary side inlet pipe B23; the electrical control assembly 7 and the power module assembly 9 are arranged in front of the valve block 6 from left to right.;

[0034] When the large-cooling-capacity rack-mounted CDU provided in Embodiment 1 of the present invention is working, the primary refrigerant circulates in the primary flow path 1 to provide a cold source for the entire heat exchange process; the primary-side inlet pipe 11 in the primary flow path 1 is responsible for introducing the low-temperature primary refrigerant. One end of it is connected to the liquid supply source outside the right side of the frame 5, and the other end is connected to the inlet A31 of the heat exchanger 3, so that the primary refrigerant can enter the heat exchanger 3. During this process, the primary-side inlet main pipe 111 and the primary-side inlet bypass pipe 112 in the primary-side inlet pipe 11 play an important role in flow regulation; the first control ball valve 1111 and its electric actuator accurately control the flow rate of the primary-side inlet main pipe 111 by changing the opening degree according to the operation requirements of the system. The electric actuator is located above the primary-side inlet main pipe 111 for easy operation and feedback adjustment; similarly, the second control ball valve 1121 and its electric actuator regulate the flow rate of the primary-side inlet bypass pipe 112, and quickly make flow adjustment decisions based on the information (such as temperature and pressure changes) fed back by the secondary-side outlet pipe 21 to ensure that the flow rate of the primary refrigerant entering the heat exchanger 3 is stable and adapted to the working conditions; the primary refrigerant entering the heat exchanger 3 flows in a specific flow path inside the heat exchanger 3, exchanges heat with the secondary refrigerant in the secondary flow path 2, and then the primary refrigerant with an increased temperature flows out from the outlet A33 of the heat exchanger 3 and is discharged to the recovery system outside the right side of the frame 5 through the primary-side outlet pipe 12. The primary-side outlet pipe 12 also acts as a conveying channel to ensure the smoothness of the primary refrigerant circulation path; the secondary refrigerant circulates in the secondary flow path 2. After directly cooling the external server, the secondary refrigerant exchanges heat with the primary refrigerant in the heat exchanger; the secondary-side inlet pipe A22 and the secondary-side inlet pipe B23 of the secondary flow path 2 introduce the secondary refrigerant to be cooled from different positions. One end of the secondary-side inlet pipe A22 is connected to the load end outside the right side of the frame 5. After introducing the higher-temperature secondary refrigerant, it is connected to the inlet B32 of the heat exchanger 3 to make the secondary refrigerant enter the heat exchanger 3; one end of the secondary-side inlet pipe B23 is connected to the liquid inlet 64 of the valve block 6. With the help of the internal flow path structure of the valve block 6, an expansion tank (its function will be described in detail later) is introduced and then connected to the outlet B34 of the heat exchanger 3; in the heat exchanger 3, the secondary refrigerant exchanges heat with the primary refrigerant through the efficient heat exchange structure of the heat exchanger 3 and quickly releases heat. The secondary refrigerant with a reduced temperature flows out from the heat exchanger 3. Subsequently, the secondary refrigerant converges to the secondary-side outlet pipe 21. One end of the secondary-side outlet pipe 21 is connected to the liquid outlet 63 of the valve block 6. Driven by the pump 4, the secondary refrigerant is reasonably distributed inside the valve block 6 and flows out from the two pump outlet connections 62 and enters the two pumps 4 respectively. The pump 4 provides power to overcome the flow resistance and pushes the secondary refrigerant to continuously circulate in the secondary flow path 2.Two pumps 4 are adopted. On the one hand, it can achieve one standby and one in use. On the other hand, it can also extend the service life of the entire CDU through the rotation of the two pumps 4. The two pumps 4 are arranged side by side in the front-back direction on the left side of the valve block 6 to save space. They operate under the unified control of the electrical control assembly 7. The electrical control assembly 7 issues commands according to the system preset parameters and various sensors to precisely adjust the rotation speed, start and stop, etc. of the pump 4 to ensure that the secondary refrigerant circulation meets the large cooling capacity refrigeration requirements. The function of the power module assembly 9 is to convert the external power supply into the power required by the internal electrical components, mainly responsible for the conversion and distribution of power. The power module assembly 9 provides suitable power for components that require power drive, such as the pump 4, the electric actuator, and the electrical control assembly 7, to ensure the stable operation of the entire system. Its layout from left to right in front of the valve block 6 is convenient for the connection and collaborative work of the lines with other control components, reducing line losses and interference. The valve block 6 is the key hub of the secondary flow path 2. The two pump inlet connectors 61 inside are connected to the liquid inlet 64, and the two pump outlet connectors 62 are connected to the liquid outlet 63 (it should be noted here that to ensure the one-way and stable flow of the refrigerant, a check valve is provided on the pipeline from the pump outlet connector 62 to the liquid outlet 63. Without these check valves, the refrigerant flowing out of the pump outlet of the opened pump may flow into the pump outlet of the closed pump, pass through the inside of the closed pump, and flow out from the pump inlet of the closed pump, thus affecting the normal operation of the flow path). It realizes the efficient distribution and collection of the secondary refrigerant between the pump 4 and the external pipeline. Connection ports are reasonably opened on its left and right sides, optimizing the internal flow channel design, reducing flow resistance and pressure loss, and ensuring the smooth inflow and outflow of the secondary refrigerant. The rear end of the pump 4 located at the rear is flush with the rear end of the heat exchanger 3, making the pump 4 and the heat exchanger 3 closely fit in the front-back direction in the frame storage area 51, making full use of space, avoiding local space waste in the front-back direction, and making the internal layout of the equipment more compact. In the above description, the rear end of the pump 4 refers to the rear end of the pump 4 when the inlet and outlet of the pump 4 face right and are fixed in the storage area 51. The frame 5 and its storage area 51 provide physical support and protection for all components. The rectangular storage area 51 is designed into a space extending in the left-right direction in length, in the front-back direction in width, and in the up-down direction in height according to the layout requirements of each component, enabling components such as the primary flow path 1, the secondary flow path 2, the heat exchanger 3, the pump 4, and the valve block 6 to be installed compactly and reasonably, which is not only convenient for production and assembly but also convenient for later maintenance and repair, ensuring the stability of the entire large cooling capacity rack-mounted CDU during operation. It should also be noted that in this embodiment, it is mentioned that the storage area 51 has three dimensions of length, width, and height.In the normal placement state of the structure of this embodiment, its length extends in the left-right direction, its width extends in the front-back direction, and its height extends in the up-down direction; it should be clear, however, that the device placement method provided in this embodiment is not limited to the normal placement; in actual applications, there are also various situations such as inverted placement and side placement. In these special placement states, there will be phenomena of being upside down, left-right reversed, and front-back reversed compared to normal placement; and there may also be situations where the front-back and up-down orientations are interchanged, the front-back and left-right orientations are interchanged, and the up-down and left-right orientations are interchanged. In addition, the electrical connection method between the two pumps, the electrical control assembly 7, and the power module assembly 9 is prior art and will not be elaborated here.

[0035] Compared with the CDU in the prior art, in this embodiment, by controlling the layout positions of the various structures in the CDU, the efficient utilization of the storage area 51 in the housing 5 is achieved, so that pumps with larger sizes and stronger performance and heat exchangers with larger sizes and stronger performance can be used compared with the prior art, thereby achieving a larger flow rate and a larger cooling capacity; within the limited cabinet space size of 900 mm in length, 480 mm in width, and 177 mm in height, a single-pump flow rate of more than 130 L / min and a cooling capacity of more than 120 kW can be achieved.

[0036] As a preferred method, in this embodiment, there is also an expansion tank 10; the expansion tank 10 is arranged in front of the valve block 6; an expansion tank connection hole 65 is opened on the valve block 6; the expansion tank connection hole 65 is communicated with the liquid outlet 63; the expansion tank 10 is communicated with the expansion tank connection hole 65. The expansion tank 10 is prior art and its specific structure will not be elaborated here. In this embodiment, the expansion tank 10 is added to buffer the pressure fluctuation; during the refrigerant circulation process, factors such as the start-stop of the pump 4, the load change, and the uneven heat transfer during the heat exchange process will all cause the refrigerant pressure in the secondary flow path 2 to fluctuate; the expansion tank 10 is communicated with the liquid outlet 63. When the pressure rises, the excess refrigerant can flow into the expansion tank 10, compress the gas in the tank, absorb the pressure energy, and relieve the tendency of the system pressure to rise instantaneously; when the pressure drops, the compressed gas in the expansion tank 10 expands, pushing the refrigerant back to the secondary flow path 2 to supplement the pressure and maintain the system pressure stable, ensuring that each component operates in a relatively stable pressure environment, reducing the risk of component damage caused by pressure shock, and extending the service life of the equipment; in addition, by setting the expansion tank 10, the stable pressure environment achieved can prevent the pump 4 from experiencing adverse conditions such as cavitation and overload under sudden pressure changes; the pump 4 operates with higher efficiency under the design conditions, reducing energy consumption, and at the same time reducing the maintenance frequency caused by abnormal conditions.

[0037] During actual operation, a ball valve is set in the primary side inlet pipeline 11 to achieve flow regulation. However, the ball valve may malfunction due to reasons such as wear, corrosion, and seal failure. To solve this problem, in this embodiment, the primary side inlet pipeline 11 includes a primary side inlet main pipe 111 and a primary side inlet bypass pipe 112; the primary side inlet main pipe 111 and the primary side inlet bypass pipe 112 share the inlet and outlet of the primary side inlet pipeline 11; a first control ball valve 1111 is set on the primary side inlet main pipe 111; the first control ball valve 1111 can control the flow of the primary side inlet main pipe 111; the electric actuator of the first control ball valve 1111 is set above the primary side inlet main pipe 111; a second control ball valve 1121 is set on the primary side inlet bypass pipe 112; the second control ball valve 1121 can control the flow of the primary side inlet bypass pipe 112; the electric actuator of the second control ball valve 1121 is set above the primary side inlet bypass pipe 112; the electric actuators of the first control ball valve 1111 and the second control ball valve 1121 are both set in front of the secondary side outlet pipeline 21. In this embodiment, by setting the primary side inlet main pipe 111 and the primary side inlet bypass pipe 112 and controlling them respectively through the first control ball valve 1111 and the second control ball valve 1121, when the first control ball valve 1111 malfunctions, the second control ball valve 1121 can be quickly enabled to ensure the normal circulation of the primary refrigerant in the primary side inlet pipeline 11 and maintain the refrigeration function of the system; this can avoid the shutdown of the entire large cooling capacity rack-mounted CDU system due to the failure of a single valve, ensure the continuous and stable operation of the equipment in places such as data centers, and reduce the possible losses caused by refrigeration interruption, such as equipment damage and data loss; when performing operations such as regular maintenance, repair, or replacement of seals on one of the ball valves, the other ball valve can continue to work to ensure the continuous operation of the system, and maintenance personnel can handle the faulty or maintenance-needed valve without affecting the normal refrigeration of the system. In addition, during the frequent opening and closing process of the valve, components such as the valve core and valve seat will wear. If the same valve is always used, the wear of the valve will accelerate, thereby shortening its service life; the structure of this embodiment can make the wear of the two valves relatively balanced by alternately using the first control ball valve 1111 and the second control ball valve 1121, and avoid excessive wear of a single valve; adjust the flow with the first control ball valve 1111 for a period of time and then switch to the second control ball valve 1121 for another period of time, so that the usage time and frequency of each valve are relatively reduced, extending the overall service life and reducing the replacement cost of the equipment.

[0038] In this embodiment, a flowmeter 211 is provided on the secondary side outlet pipeline 21; the preferred flowmeter 211 in this embodiment is an ultrasonic flowmeter. The function of the flowmeter 211 is to monitor the flow rate in the secondary flow path. The flowmeter 211 is arranged on the lower side of the secondary side outlet pipeline 21 and on the right side of the secondary side inlet pipeline B23, which is beneficial to avoiding interference from other components, facilitating installation, debugging and maintenance, making the entire pipeline layout more reasonable and compact, and facilitating observation and operation by the operator. The ultrasonic flowmeter is a prior art. After installation, it does not need to be in direct contact with the fluid in the pipe, and it will not impede the flow of the fluid in the pipe during the measurement process. Therefore, no pressure drop will be generated in the pipe, greatly reducing the impact on the flow of the secondary refrigerant and ensuring the efficient operation of the system.

[0039] In this embodiment, the left side of the frame body 5 is a cover plate 52; a plurality of heat dissipation holes 521 are provided on the cover plate 52; a touch screen 522 is fixed on the cover plate 52; the touch screen 522 is fixed on the left side of the electrical control assembly 7. Fixing the touch screen 522 on the left side of the electrical control assembly 7 can facilitate the electrical connection between the touch screen 522 and the electrical control assembly 7; a plurality of heat dissipation holes 521 are provided on the cover plate 52 to discharge the heat generated by the pump 4 from inside the frame body 5 to the outside; the touch screen 522 is usually arranged in the orientation convenient for the staff to use. Therefore, after the CDU is specifically installed, the cover plate 52 is the convenient use side. The cover plate 52 itself can be disassembled. After the pump 4 fails, the pump 4 can be exposed from the storage area 51 of the frame body 5 by directly opening the cover plate 52, thus facilitating the repair of the pump 4; preferably in this embodiment, the pump 4 is fixed to the valve block 6 in a hot-swappable manner.

[0040] In this embodiment, the inlet of the pump 4 is connected to the pump inlet connection port 61 through a blind plug connector; the outlet of the pump 4 is connected to the pump outlet connection port 62 through a blind plug connector. The "blind plug connector" is a prior art. For example, the structure description of the "blind plug connector" is described in the floating module, blind plug connector and liquid cooling system disclosed in Chinese Patent Application No. 202411188607.7. In this embodiment, it will not be elaborated too much; in this embodiment, through the connection method of the "blind plug connector", the technical effect of replacing the pump without stopping the machine and not leaking water during replacement can be achieved.

[0041] In this embodiment, one of the secondary side outlet pipeline 21, the secondary side inlet pipeline A22, and the secondary side inlet pipeline B23 is also connected to a liquid supplement pipeline 221. The specific implementation method for preferably fixing the liquid supplement pipeline 221 in this embodiment is as follows: The liquid supplement pipeline 221 is connected to the secondary side inlet pipeline A22; the liquid supplement pipeline 221 extends forward along the secondary side inlet pipeline A22, and a bypass is connected to the right of the liquid supplement pipeline 221 and passes through the right side of the frame body 5; the liquid supplement port of the liquid supplement pipeline 221 is connected to the outside of the right side of the frame body 5; a liquid supplement valve 2211 is provided at the liquid supplement port; the liquid supplement valve 2211 can control the on-off of the liquid supplement port. During the long-term operation of the CDU, the secondary refrigerant will be lost due to various reasons, such as there being a small leak in the system, and partial evaporation loss of the refrigerant during the heat exchange process, etc.; the existence of the liquid supplement pipeline 221 can ensure the sufficiency of the refrigerant in the secondary flow path 2 by externally connecting the secondary refrigerant and maintain the normal refrigeration cycle of the system.

[0042] Preferably in this embodiment, the left ends of the electrical control assembly 6 and the pump 4 are aligned; ensuring that the electrical control assembly 6 and the pump 4 are aligned at the left edge aims to reduce the spatial redundancy in the left-right direction and achieve the reasonable installation of more components within the limited cabinet space, thereby improving the overall integration of the equipment. The touch screen 522 is fixed on the cover plate 52.

[0043] In summary, the present invention provides a large cooling capacity rack-mounted CDU, which relates to the field of heat exchangers and includes a primary flow path, a secondary flow path, a heat exchanger, two pumps, a frame body, a valve block and an electrical control assembly; the primary flow path is the flow path of the primary refrigerant; the secondary flow path is the flow path of the secondary refrigerant; the heat exchanger is connected to the primary flow path and the secondary flow path; the pump is connected to the secondary flow path; the frame body has a storage area; the storage area is a rectangular space; the storage area has a length, a width and a height; the length of the storage area extends in the left-right direction; the width of the storage area extends in the front-back direction; the height of the storage area extends in the up-down direction; the pump is arranged on the left side of the valve block; the two pumps are arranged adjacent to each other in the front-back direction; the valve block is arranged on the left side of the heat exchanger; the rear ends of the pump located at the rear side and the rear end of the heat exchanger are flush; the valve block includes two pump inlet connection ports, two pump outlet connection ports, a liquid outlet and a liquid inlet; the two pump inlet connection ports are communicated with the liquid inlet; the two pump outlet connection ports are communicated with the liquid outlet; the pump inlet connection ports and the pump outlet connection ports are opened on the left side of the valve block; the liquid outlet and the liquid inlet are opened on the right side of the valve block; a check valve is arranged on the pipeline from the pump outlet connection port to the liquid outlet; the inlet and the outlet of the pump are respectively communicated with one of the pump inlet connection ports and the pump outlet connection ports; the heat exchanger has an inlet A, an inlet B, an outlet A and an outlet B; the inlet A and the outlet A are the inlet and the outlet of the primary flow path in the heat exchanger, and the inlet B and the outlet B are the inlet and the outlet of the secondary flow path in the heat exchanger; the outlet B is above the inlet A; the inlet B is above the outlet A; the outlet B is on the left side of the inlet B; the inlet A is on the left side of the outlet A; the primary flow path includes a primary side inlet pipeline and a primary side outlet pipeline; one end of the primary side inlet pipeline is communicated with the inlet A, and the other end is communicated to the outside of the right side of the frame body; one end of the primary side outlet pipeline is communicated with the outlet A, and the other end is communicated to the outside of the right side of the frame body; the secondary flow path includes a secondary side outlet pipeline, a secondary side inlet pipeline A and a secondary side inlet pipeline B; one end of the secondary side outlet pipeline is communicated with the liquid outlet, and the other end is communicated to the outside of the right side of the frame body; one end of the secondary side inlet pipeline B is communicated with the liquid inlet, and the other end is communicated with the outlet B; one end of the secondary side inlet pipeline A is communicated with the inlet B, and the other end is communicated to the outside of the right side of the frame body; the primary side inlet pipeline, the primary side outlet pipeline, the secondary side inlet pipeline A, the secondary side inlet pipeline B and the secondary side outlet pipeline all extend in the horizontal direction; the primary side inlet pipeline, the primary side outlet pipeline, the secondary side inlet pipeline A, the secondary side inlet pipeline B and the secondary side outlet pipeline are all arranged on the right side of the valve block;The primary side inlet pipeline, the primary side outlet pipeline, the secondary side inlet pipeline A, the secondary side inlet pipeline B, and the secondary side outlet pipeline are all arranged in front of the heat exchanger; the primary side inlet pipeline and the primary side outlet pipeline are arranged below the secondary side inlet pipeline A and the secondary side inlet pipeline B; the secondary side outlet pipeline is arranged above the secondary side inlet pipeline A and the secondary side inlet pipeline B; the electrical control assembly is arranged in front of the pump. The large-cooling-capacity rack-mounted CDU provided by the present invention solves the problem of poor refrigeration effect of the existing CDU and can achieve better refrigeration effect within a limited cabinet space.

[0044] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A large cooling capacity rack-mounted CDU, comprising a primary flow path, a secondary flow path, a heat exchanger, two pumps and a housing; the primary flow path is the flow path of the primary refrigerant; the secondary flow path is the flow path of the secondary refrigerant; the heat exchanger is connected to the primary flow path and the secondary flow path; the pump is connected to the secondary flow path; the housing has a storage area; characterized in that, it further comprises a valve block and an electrical control assembly; the storage area is a rectangular space; the storage area has a length, a width and a height; the length of the storage area extends in the left-right direction; the width of the storage area extends in the front-back direction; the height of the storage area extends in the up-down direction; the pump is arranged on the left side of the valve block; the two pumps are arranged adjacent to each other in the front-back direction; the valve block is arranged on the left side of the heat exchanger; the rear end of the pump located at the rear is flush with the rear end of the heat exchanger; the valve block includes two pump inlet connection ports, two pump outlet connection ports, a liquid outlet and a liquid inlet; the two pump inlet connection ports are communicated with the liquid inlet; the two pump outlet connection ports are communicated with the liquid outlet; the pump inlet connection ports and the pump outlet connection ports are opened on the left side of the valve block; the liquid outlet and the liquid inlet are opened on the right side of the valve block; a check valve is arranged on the pipeline from the pump outlet connection port to the liquid outlet; the inlet and outlet of the pump are respectively communicated with one of the pump inlet connection ports and the pump outlet connection port; the heat exchanger has an inlet A, an inlet B, an outlet A and an outlet B; the inlet A and the outlet A are the inlet and outlet of the primary flow path in the heat exchanger, and the inlet B and the outlet B are the inlet and outlet of the secondary flow path in the heat exchanger; the outlet B is above the inlet A; the inlet B is above the outlet A; the outlet B is on the left side of the inlet B; the inlet A is on the left side of the outlet A; the primary flow path includes a primary side inlet pipeline and a primary side outlet pipeline; one end of the primary side inlet pipeline is communicated with the inlet A, and the other end is communicated to the outside of the right side of the housing; one end of the primary side outlet pipeline is communicated with the outlet A, and the other end is communicated to the outside of the right side of the housing; the secondary flow path includes a secondary side outlet pipeline, a secondary side inlet pipeline A and a secondary side inlet pipeline B; one end of the secondary side outlet pipeline is communicated with the liquid outlet, and the other end is communicated to the outside of the right side of the housing; one end of the secondary side inlet pipeline B is communicated with the liquid inlet, and the other end is communicated with the outlet B; one end of the secondary side inlet pipeline A is communicated with the inlet B, and the other end is communicated to the outside of the right side of the housing; the primary side inlet pipeline, the primary side outlet pipeline, the secondary side inlet pipeline A, the secondary side inlet pipeline B and the secondary side outlet pipeline all extend in the horizontal direction; the primary side inlet pipeline, the primary side outlet pipeline, the secondary side inlet pipeline A, the secondary side inlet pipeline B and the secondary side outlet pipeline are all arranged on the right side of the valve block; the primary side inlet pipeline, the primary side outlet pipeline, the secondary side inlet pipeline A, the secondary side inlet pipeline B and the secondary side outlet pipeline are all arranged in front of the heat exchanger; The primary side inlet pipeline and the primary side outlet pipeline are arranged below the secondary side inlet pipeline A and the secondary side inlet pipeline B; The secondary side outlet pipeline is arranged above the secondary side inlet pipeline A and the secondary side inlet pipeline B; The electrical control assembly is arranged in front of the pump.

2. The large-cooling-capacity rack-mounted CDU according to claim 1, characterized in that, It further includes a power module assembly; the power module assembly is arranged in front of the heat exchanger; the power module assembly is arranged on the right side of the electrical control assembly.

3. The large-cooling-capacity rack-mounted CDU according to claim 1, characterized in that It further includes an expansion tank; the expansion tank is arranged in front of the valve block; An expansion tank connection hole is provided on the valve block; the expansion tank connection hole communicates with the liquid outlet; The expansion tank communicates with the expansion tank connection hole.

4. The large-cooling-capacity rack-mounted CDU according to claim 1, characterized in that, The primary side inlet pipeline includes a primary side inlet main pipe and a primary side inlet bypass pipe; the primary side inlet main pipe and the primary side inlet bypass pipe share the inlet and outlet of the primary side inlet pipeline; A first control ball valve is arranged on the primary side inlet main pipe; the first control ball valve can control the flow rate of the primary side inlet main pipe; the electric actuator of the first control ball valve is arranged above the primary side inlet main pipe; A second control ball valve is arranged on the primary side inlet bypass pipe; the second control ball valve can control the flow rate of the primary side inlet bypass pipe; the electric actuator of the second control ball valve is arranged above the primary side inlet bypass pipe; The electric actuators of the first control ball valve and the second control ball valve are both arranged in front of the secondary side outlet pipeline.

5. The large-cooling-capacity rack-mounted CDU according to claim 1, characterized in that, A flow meter is arranged on the secondary side outlet pipeline.

6. The large-cooling-capacity rack-mounted CDU according to claim 5, wherein The flow meter is an ultrasonic flow meter.

7. The large-cooling-capacity rack-mounted CDU according to claim 1, characterized in that, The left side of the frame body is a cover plate; a plurality of heat dissipation holes are provided on the cover plate; a touch screen is fixed on the cover plate; the touch screen is fixed on the left side of the electrical control assembly.

8. The large cooling capacity rack-mounted CDU according to claim 1, characterized in that The inlet of the pump is connected to the pump inlet connection port through a blind plug connector; The outlet of the pump is connected to the pump outlet connection port through a blind plug connector.

9. The large-cooling-capacity rack-mounted CDU according to claim 1, characterized in that One of the secondary side outlet pipeline, the secondary side inlet pipeline A, and the secondary side inlet pipeline B is further connected with a liquid supplement pipe; the liquid supplement port of the liquid supplement pipe communicates to the outside of the frame body.

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