Refrigerant circulation device, cooling device, and pump unit

Abstract

A refrigerant circulation device according to one embodiment of the present disclosure is provided with a primary flow path, a secondary flow path, a heat exchanger, a housing, a power supply connector, two inflow ports, and two outflow ports. The primary flow path allows a primary refrigerant to flow therethrough. A secondary refrigerant flows through the secondary flow path. The heat exchanger is connected to the primary flow path and the secondary flow path. The housing has two first outer side surfaces extending in a first direction and two second outer side surfaces extending in a second direction intersecting the first direction in plan view, and houses the primary flow path, the secondary flow path, and the heat exchanger. The power connector is arranged on the first outer side face and protrudes from the first outer side face. The two inflow ports are located on the first outer side surface on which the power connector is provided, and communicate with the primary flow path and the secondary flow path, respectively. The two flow outlets are located in the first outer side face provided with the power connector and communicate with the primary flow path and the secondary flow path correspondingly. At least one of the two inflow ports and at least one of the two outflow ports are disposed on opposite sides in the first direction across the power supply connector in plan view.

Description

Technical Field

[0001] The present disclosure relates to a refrigerant cycle device, a cooling device, and a pump unit. Background Art

[0002] Conventionally, there is known a refrigerant cycle device that transfers heat received from a heat source such as a CPU (Central Processing Unit) to a refrigerant circulating inside to cool the heat source (see Patent Document 1).

[0003] The refrigeration cycle device described in Patent Document 1 has a primary refrigerant flow path and a secondary refrigerant flow path inside. The primary refrigerant inlet and outlet and the secondary refrigerant inlet and outlet are provided on the back of the refrigeration cycle device and are connected to pipes respectively. Prior art literature Patent Literature

[0004] Patent Document 1: U.S. Patent Application Publication No. 2022 / 0248570 Summary of the invention

[0005] In recent years, there has been a demand to place a power supply unit of a refrigeration cycle device on the back of the refrigeration cycle device and directly connect it to a power supply unit fixed to a frame, etc. However, when the power supply unit is placed on the back of the refrigeration cycle device, the routing of the piping for circulating the refrigerant becomes complicated, and there is a possibility that multiple piping and the power supply unit interfere with each other.

[0006] Therefore, the present disclosure provides a technology that can facilitate the routing of a pipe.

[0007] A refrigerant circulation device of one embodiment of the present disclosure comprises a primary flow path, a secondary flow path, a heat exchanger, a frame, a power connector, two inlets and two outlets. The primary flow path is for the circulation of a primary refrigerant. The secondary flow path is for the circulation of a secondary refrigerant. The heat exchanger is connected to the primary flow path and the secondary flow path. The frame has two first outer side surfaces extending along a first direction when viewed from above and two second outer side surfaces extending along a second direction intersecting the first direction, and accommodates the primary flow path, the secondary flow path and the heat exchanger. The power connector is disposed on the first outer side surface and protrudes from the first outer side surface. The two inlets are located on the first outer side surface where the power connector is disposed, and are respectively connected to the primary flow path and the secondary flow path. The two outlets are located on the first outer side surface where the power connector is disposed, and are respectively connected to the primary flow path and the secondary flow path. At least one of the two inlets and at least one of the two outlets are arranged on opposite sides across the power connector in the first direction when viewed from above.

[0008] According to the present disclosure, it is possible to facilitate the routing of the pipe. BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 This is a schematic diagram of a cooling device including a CDU according to an embodiment. Figure 2 This is a schematic perspective view of a cooling device including a CDU according to an embodiment. Figure 3 is a schematic perspective view of a CDU according to an embodiment. Figure 4 1 is a schematic perspective view showing the interior of a CDU according to an embodiment. Figure 5 1 is a schematic perspective view showing the interior of a CDU according to an embodiment. Figure 6 is a schematic front view of a CDU of an embodiment. Figure 7 is a schematic side view of a CDU of an embodiment. Figure 8 1 is a schematic top view showing the interior of the CDU according to the embodiment. Fig. 9 It is an exploded perspective view showing the structure of the CDU according to the embodiment. Fig.10 is a schematic rear view of a CDU of an embodiment. Fig.11A is a schematic rear view of a CDU of an embodiment. Fig. 11B is a schematic top view of a CDU of an embodiment. Fig. 12A yes Figure 7 XX line cross-sectional view. Fig. 12B yes Figure 7 XI-XI line cross-sectional view. Fig. 12C yes Figure 7 Sectional view along line XII-XII. Fig.13 It is a perspective view showing a pump unit and its peripheral components according to an embodiment. Fig.14A It is a perspective view showing a pump unit according to the embodiment. Fig. 14B It is a cross-sectional perspective view showing a fitting portion between the pump unit and the frame according to the embodiment. Fig.15A It is a cross-sectional perspective view showing a handle operating portion of the pump unit according to the embodiment. Fig. 15B It is a cross-sectional perspective view showing a restricted state of the pump unit according to the embodiment. Fig.16 It is a perspective view showing a restricted state of the pump unit according to the embodiment. Fig.17A It is a perspective view showing an injection hole and its peripheral components according to an embodiment. Fig. 17B It is a top view showing the tank according to the embodiment. Fig. 17C yes Fig. 17B Cross-sectional view along line XVII-XVII. Fig.18A It is a perspective view showing the structure of the control unit according to the embodiment. Fig.18B Schematic cross-sectional view showing a holding portion of a control unit and its peripheral components according to an embodiment. Fig.19A It is a diagram for explaining the procedure of inserting and removing the control unit according to the embodiment. Fig.19B It is a diagram for explaining the procedure of inserting and removing the control unit according to the embodiment. Fig.19C It is a diagram for explaining the procedure of inserting and removing the control unit according to the embodiment. Fig.19D It is a diagram for explaining the procedure of inserting and removing the control unit according to the embodiment. Fig. 20A It is a schematic perspective view of a control unit and its peripheral components according to an embodiment. Fig. 20B It is a schematic perspective view of a control unit and its peripheral components according to an embodiment. Fig.21A 1 is a schematic top view of a power connector and its peripheral components according to an embodiment. Fig. 21B 1 is a schematic top view of a power connector and its peripheral components according to an embodiment. Fig. 21C 1 is a schematic top view of a power connector and its peripheral components according to an embodiment. Fig. 22 This is a diagram for explaining an example of information displayed on the touch panel according to the embodiment. Fig.23 It is a perspective view showing a liquid outlet and its peripheral components according to an embodiment. Fig.24 is a schematic cross-sectional view of a CDU according to an embodiment. Fig.25A It is a perspective view showing a CDU locking protrusion and its peripheral components according to the embodiment. Fig.25B It is a plan view showing the CDU locking protrusion and its surrounding members according to the embodiment. DETAILED DESCRIPTION

[0009] Hereinafter, with reference to the accompanying drawings, a method for implementing the refrigerant cycle device, cooling device and pump unit disclosed herein (hereinafter referred to as an "implementation method") is described in detail. In addition, the present disclosure is not limited to the implementation method. In addition, in each implementation method, the processing contents can be appropriately combined within a non-contradictory range. In addition, in each of the following implementation methods, the same symbol is marked on the same part, and repeated descriptions are omitted.

[0010] In the drawings referred to below, in order to facilitate understanding of the description, an orthogonal coordinate system is sometimes shown in which an X-axis direction, a Y-axis direction, and a Z-axis direction are defined to be orthogonal to each other and the Z-axis direction is set as a vertical upward direction.

[0011] In the following description, the Y-axis direction corresponds to the "first direction", the X-axis direction corresponds to the "second direction", and the Z-axis direction corresponds to the "third direction". For example, the X-axis direction and the Y-axis direction are horizontal directions. The Z-axis direction is the up-down direction.

[0012] In addition, in the following description, each direction of the X-axis direction, the Y-axis direction, and the Z-axis direction includes an error range allowed in the technical field to which the present invention belongs (for example, a range of about ±45°). As an example, "extending along the X-axis direction" includes a case of extending along the X-axis direction in a strict sense, and a case of extending in a direction deviating from the X-axis direction by a range of about ±45°.

[0013] (Implementation Method) <1. Structure of cooling device> First, refer to Figure 1 and Figure 2 Cooling device 1000 according to the embodiment will be described. Figure 1 This is a schematic diagram of a cooling device 1000 including a CDU 100 according to the embodiment. Figure 2 This is a schematic perspective view of a cooling device 1000 including a CDU 100 according to the embodiment. In addition, "CDU" is an abbreviation of "Coolant Distribution Unit".

[0014] The cooling device 1000 cools the heat source HS. For example, the heat source HS is a rack server or a blade server, etc., which is arranged inside the server rack SR. In addition, the heat source HS may also be an electronic device different from the server, such as a projector, a personal computer, and a display. In addition, the heat source HS may also be an electronic component such as a CPU, an electrolytic capacitor, a power semiconductor module, and a printed circuit board.

[0015] The cooling device 1000 includes a CDU 100. The CDU 100 is an example of a refrigerant cycle device. The CDU 100 is arranged inside the server rack SR. However, the present invention is not limited thereto. The CDU 100 may be arranged outside the server rack SR.

[0016] CDU100 controls the temperature or water distribution destination of the refrigerant supplied from the equipment side. CDU100 sucks the primary refrigerant into the interior of CDU100 and presses the primary refrigerant to the outside of CDU100. In addition, CDU100 sucks the secondary refrigerant into the interior of CDU100 and presses the secondary refrigerant to the outside of CDU100. In addition, no pump on the primary refrigerant side is provided inside CDU100, so the suction and pressure delivery of the primary refrigerant in CDU100 are performed by an external pump. CDU100 performs heat exchange between the primary refrigerant and the secondary refrigerant. For example, refrigerant liquids such as antifreeze and pure water can be used as the primary refrigerant and the secondary refrigerant. As antifreeze that can be used as a refrigerant, there are ethylene glycol aqueous solution and propylene glycol aqueous solution, etc. In addition, the types of the primary refrigerant and the secondary refrigerant can be the same as each other or different. In addition, at least one of the primary refrigerant and the secondary refrigerant can also be a gas refrigerant.

[0017] CDU100 is connected to flow path FL11 and flow path FL12. CDU100 sucks in the primary refrigerant flowing in flow path FL11 and presses the primary refrigerant to flow path FL12. In addition, CDU100 is connected to flow path FL21 and flow path FL22. CDU100 presses the secondary refrigerant to flow path FL21 and sucks in the secondary refrigerant flowing in flow path FL22.

[0018] A low-temperature primary refrigerant flows into the CDU 100. In addition, a high-temperature secondary refrigerant flows into the CDU 100. Heat is exchanged between the low-temperature primary refrigerant and the high-temperature secondary refrigerant inside the CDU 100. As a result, the high-temperature secondary refrigerant is cooled.

[0019] The cooling device 1000 includes a cooling unit 1001. The cooling unit 1001 cools the primary refrigerant. The cooling unit 1001 may be a device installed indoors, or may be an outdoor device such as a cooling tower. The cooling unit 1001 is connected to the flow path FL11. The cooling unit 1001 presses the primary refrigerant to the CDU 100 via the flow path FL11. In addition, the cooling unit 1001 is connected to the flow path FL12. The cooling unit 1001 sucks the primary refrigerant from the CDU 100 via the flow path FL12.

[0020] The cooling device 1000 includes a plurality of cold plates 1002. The cold plates 1002 are connected to the flow paths FL21 and FL22. The cold plates 1002 have internal flow paths. The internal flow paths of the cold plates 1002 extend from the connection point with the flow path FL21 to the connection point with the flow path FL22. That is, the secondary refrigerant flows inside the cold plates 1002.

[0021] The cold plate 1002 is in thermal contact with the heat source HS. The cold plate 1002 may be in direct contact with the heat source HS or may be in indirect contact with the heat source HS via a heat transfer member such as a heat transfer sheet.

[0022] By bringing the cold plate 1002 into thermal contact with the heat source HS, the heat energy of the heat source HS is transferred to the secondary refrigerant flowing inside the cold plate 1002. As a result, the heat source HS is cooled. The secondary refrigerant used for cooling the heat source HS flows into the CDU 100 via the flow path FL22.

[0023] The same number of cold plates 1002 as the number of heat sources HS is provided in the server rack SR, and each heat source HS is in thermal contact with one cold plate 1002 .

[0024] like Figure 1 As shown, when a plurality of heat sources HS are installed in the server rack SR, for example, a portion of the flow path FL21 is constituted by the distribution manifold 2002 , and a portion of the flow path FL22 is constituted by the collection manifold 2001 .

[0025] The collecting manifold 2001 is connected to a plurality of cold plates 1002. The collecting manifold 2001 has a plurality of inlets and one outlet. Each inlet of the collecting manifold 2001 is connected to a different cold plate 1002. The secondary refrigerant flowing out of each cold plate 1002 flows into the collecting manifold 2001 through each inlet of the collecting manifold 2001. The outlet of the collecting manifold 2001 is connected to the CDU 100. Thus, the secondary refrigerant flowing out of each cold plate 1002 flows into the CDU 100.

[0026] The distribution manifold 2002 is connected to the plurality of cold plates 1002. The distribution manifold 2002 has an inlet and a plurality of outlets. The secondary refrigerant flows from the CDU 100 into the inlet of the distribution manifold 2002. The secondary refrigerant flowing from the inlet of the distribution manifold 2002 flows out from each outlet of the distribution manifold 2002. Each outlet of the distribution manifold 2002 is connected to a different cold plate 1002. Thus, the secondary refrigerant flows into each cold plate 1002. The configuration of the collection manifold 2001 and the distribution manifold 2002 is described below.

[0027] Figure 1 , the number of cold plates 1002 (ie, the number of heat sources HS) is three. Figure 1 In the figure, the direction of flow of each refrigerant is shown by the direction of the arrow.

[0028] <2. Structure of CDU> Next, refer to Figure 3 to Figure 9 The configuration of the CDU 100 according to the embodiment will be described. Figure 3 1 is a schematic perspective view of a CDU 100 according to an embodiment. Figure 4 and Figure 5 1 is a schematic perspective view showing the interior of the CDU 100 according to the embodiment. Figure 6 1 is a schematic front view of the CDU 100 according to the embodiment. Figure 7 is a schematic side view of a CDU 100 of an embodiment. Figure 8 1 is a schematic plan view showing the interior of the CDU 100 according to the embodiment. Fig. 9 It is an exploded perspective view showing the structure of the CDU 100 according to the embodiment.

[0029] CDU100 has a primary flow path 1 (refer to Fig. 12C ) and secondary flow path 2 (refer to Fig. 12B The primary flow path 1 is for the primary refrigerant to flow through, and the secondary flow path 2 is for the secondary refrigerant to flow through.

[0030] The CDU 100 includes a heat exchanger 3. The heat exchanger 3 is connected to the primary flow path 1 and the secondary flow path 2. The primary refrigerant and the secondary refrigerant flow into the heat exchanger 3 and flow out from the heat exchanger 3. The heat exchanger 3 performs heat exchange between the primary refrigerant and the secondary refrigerant therein. The heat exchange method of the heat exchanger 3 is, for example, a plate type.

[0031] CDU100 is provided with a pump unit 4. The pump unit 4 is connected to the secondary flow path 2. The pump unit 4 has an internal flow path. The pump unit 4 is driven to suck the secondary refrigerant into the interior of the pump unit 4, and the secondary refrigerant is pressed from the internal flow path of the pump unit 4. Thus, the secondary refrigerant circulates between the CDU100 and the cold plate 1002. The number of pump units 4 is not particularly limited. For example, the number of pump units 4 is two. That is, CDU100 is provided with a plurality of pump units 4.

[0032] The CDU 100 includes a tank 5. The tank 5 stores a refrigerant used as a secondary refrigerant. The tank 5 is connected to the secondary flow path 2. The tank 5 can supply the refrigerant to the secondary flow path 2.

[0033] The CDU 100 includes a control unit 6. The control unit 6 is connected to a temperature and humidity sensor, a temperature sensor for the primary refrigerant and the secondary refrigerant, a flow sensor for the primary refrigerant, and a pressure sensor 104 for the secondary refrigerant (see FIG. Figure 4) connection. In addition, the control unit 6 controls the pump unit 4, the control valves V1 and V2 (refer to Fig. 12C ) control.

[0034] The CDU 100 includes a touch screen 8. The touch screen 8 is provided on the front surface of the CDU 100 and displays the operating status of the system, the measured values ​​of each sensor, and the like.

[0035] The CDU 100 includes a housing 9 . The housing 9 has a storage area 90 . The housing 9 stores the primary flow path 1 , the secondary flow path 2 , the heat exchanger 3 , the pump unit 4 , the tank 5 , the control unit 6 , and the touch screen 8 in the storage area 90 .

[0036] <2-1. Frame> Next, refer to Figures 4 to 8 The frame 9 of the CDU 100 of the embodiment is described. When viewed from above from the Z-axis direction, the storage area 90 is roughly rectangular with the X-axis direction as the long side direction and the Y-axis direction as the short side direction. That is, the storage area 90 extends in the X-axis direction and the Y-axis direction intersecting each other, and has a longer dimension in the X-axis direction than in the Y-axis direction. In addition, the storage area 90 has the Z-axis direction as the depth direction. The width (depth) of the storage area 90 in the Z-axis direction is smaller than the width of the storage area 90 in the X-axis direction and the Y-axis direction.

[0037] The housing 9 includes a plurality of plates 91 to 96. The plurality of plates 91 to 96 are made of sheet metal, for example. The plurality of plates 91 to 96 surround the storage area 90. That is, the housing 9 includes an area surrounded by the plurality of plates 91 to 96 as the storage area 90.

[0038] Plate 91 and plate 92 are arranged opposite to each other with the storage area 90 sandwiched in the X-axis direction. Plate 91 is arranged on one side of the X-axis direction (the positive direction side of the X-axis). Plate 92 is arranged on the other side of the X-axis direction (the negative direction side of the X-axis). That is, plate 91 divides the storage area 90 by covering the storage area 90 from one side of the X-axis direction. Plate 92 divides the storage area 90 by covering the storage area 90 from the other side of the X-axis direction. Plate 91 and plate 92 define the width of the storage area 90 in the X-axis direction. In the following description, plate 91 is sometimes referred to as back plate 91 and plate 92 is referred to as front plate 92 to distinguish them from other plates constituting frame 9. Plate 91 and plate 92 are examples of two first outer side surfaces extending along the Y-axis direction.

[0039] The power connector 7 is provided on the rear panel 91. Specifically, the power connector 7 protrudes from the rear panel 91. In addition, the rear panel 91 is provided with a LAN (Local Area Network) cable connection port 72.

[0040] A front handle 102 is provided on the front panel 92 .

[0041] The plate 93 and the plate 94 are arranged opposite to each other with the storage area 90 sandwiched in the Y-axis direction. The plate 93 is arranged on one side of the Y-axis direction (the positive side of the Y-axis). The plate 94 is arranged on the other side of the Y-axis direction (the negative side of the Y-axis). That is, the plate 93 divides the storage area 90 by covering the storage area 90 from one side of the Y-axis direction. The plate 94 divides the storage area 90 by covering the storage area 90 from the other side of the Y-axis direction. The plate 93 and the plate 94 define the width of the storage area 90 in the Y-axis direction. The plate 93 and the plate 94 are an example of two second outer side surfaces extending in the X-axis direction.

[0042] The plate 95 and the plate 96 are arranged opposite to each other with the storage area 90 sandwiched in the Z-axis direction. The plate 95 is arranged on one side in the Z-axis direction (the positive side in the Z-axis direction). The plate 96 is arranged on the other side in the Z-axis direction (the negative side in the Z-axis direction). That is, the plate 95 divides the storage area 90 by covering the storage area 90 from one side in the Z-axis direction. The plate 96 divides the storage area 90 by covering the storage area 90 from the other side in the Z-axis direction. The plate 95 and the plate 96 define the width of the storage area 90 in the Z-axis direction. In addition, the plate 95 is a cover that covers the storage area 90 from the upper side. The plate 96 covers the bottom of the storage area 90 from the lower side.

[0043] <2-2. Inlet and outlet> Next, refer to Fig.10 , Fig.11A and Fig. 11B The inlets 91A and 92A and the outlets 91B and 92B according to the embodiment will be described. Fig.10 and Fig.11A is a schematic rear view of a CDU 100 of an embodiment. Fig. 11B is a schematic top view of a CDU 100 according to an embodiment. Fig.11A and Fig. 11B , the CDU 100 is shown in a state where it is arranged in the server rack SR. Fig.11A and Fig. 11B In the figure, the direction of flow of each refrigerant is shown by the direction of the arrow.

[0044] The housing 9 includes two inlets 91A and 92A. Specifically, the two inlets 91A and 92A include a primary inlet 91A and a secondary inlet 92A.

[0045] The primary inlet 91A is connected to the primary flow path 1 and is an inlet for the primary refrigerant to flow into the CDU 100. The primary inlet 91A is connected to the flow path FL11 (see Figure 1 The primary refrigerant flows from the cooling unit 1001 into the CDU 100 through the primary inlet 91A.

[0046] The secondary inlet 92A communicates with the secondary flow path 2 and is an inlet for the secondary refrigerant to flow into the CDU 100. The secondary inlet 92A is connected to the flow path FL22 (see FIG. 1 ) extending from the cold plate 1002. Figure 1 ), that is, the collecting manifold 2001. The secondary refrigerant flows from the cold plate 1002 into the CDU 100 through the secondary inlet 92A.

[0047] Moreover, the housing 9 includes two outflow ports 91B and 92B. Specifically, the two outflow ports 91B and 92B include a primary outflow port 91B and a secondary outflow port 92B.

[0048] The primary outflow port 91B is connected to the primary flow path 1 and is an outflow port for the primary refrigerant from the inside of the CDU 100. The primary outflow port 91B is connected to the flow path FL12 (see Figure 1 The primary refrigerant flows out from the interior of the CDU 100 to the cooling unit 1001 through the primary outflow port 91B.

[0049] The secondary outflow port 92B communicates with the secondary flow path 2 and is an outflow port for the secondary refrigerant from the inside of the CDU 100. The secondary outflow port 92B is connected to the flow path FL21 (see Figure 1 ), that is, connected to the distribution manifold 2002. The secondary refrigerant flows out from the inside of the CDU 100 to the cold plate 1002 through the secondary outflow port 92B.

[0050] Two inlets 91A, 92A and two outlets 91B, 92B are arranged on the back plate 91. For example, the back plate 91 has four openings that penetrate along the X-axis direction. The cylindrical members with the X-axis direction as the axial direction protrude from the above four openings to the side of the X-axis direction (X-axis positive direction side) than the back plate 91. The frame 9 has four cylindrical members protruding from the back plate 91 to one side of the X-axis direction as the primary inlet 91A, the primary outlet 91B, the secondary inlet 92A and the secondary outlet 92B.

[0051] Here, when the power connector 7, the two inlets 91A and 92A, and the two outlets 91B and 92B are arranged on the back plate 91 as described above, the routing of the pipes for circulating the refrigerant becomes complicated, and the plurality of pipes may interfere with the power connector 7. Specifically, the primary inlet 91A and the cooling unit 1001 (see Figure 1 ) The four pipes, the pipe connecting the primary outlet 91B and the cooling unit 1001, the pipe connecting the secondary outlet 92A and the collecting manifold 2001, and the pipe connecting the secondary outlet 92B and the distribution manifold 2002, may interfere with the power connector 7.

[0052] Therefore, in the CDU 100 of the embodiment, at least one of the two inlets 91A and 92A and at least one of the two outlets 91B and 92B are configured to be arranged on opposite sides in the Y-axis direction across the power connector 7. Specifically, the secondary inlet 92A and the secondary outlet 92B are arranged on opposite sides in the Y-axis direction across the power connector 7. Fig.10 In the example of FIG. 1 , the secondary inlet 92A is arranged on the positive side of the Y axis relative to the power connector 7 . The secondary outlet 92B is arranged on the negative side of the Y axis relative to the power connector 7 .

[0053] Similarly, the primary inlet 91A and the primary outlet 91B are arranged on opposite sides across the power connector 7 in the Y-axis direction. Fig.10 In the example of FIG. 1 , the primary inlet 91A is arranged on the negative side of the Y axis relative to the power connector 7 . The primary outlet 91B is arranged on the positive side of the Y axis relative to the power connector 7 .

[0054] In this way, by arranging at least one of the two inlets 91A, 92A and at least one of the two outlets 91B, 92B on opposite sides in the Y-axis direction across the power connector 7, the power connector 7, the piping connected to at least one of the two inlets 91A, 92A, and the piping connected to at least one of the two outlets 91B, 92B are not easily interfered with, thereby facilitating the pulling and winding of the piping.

[0055] In addition, the arrangement of the secondary inlet 92A and the secondary outlet 92B is not limited to Fig.10 For example, the secondary inlet 92A may be arranged on the negative side of the Y axis relative to the power connector 7, and the secondary outlet 92B may be arranged on the positive side of the Y axis relative to the power connector 7. Similarly, the arrangement of the primary inlet 91A and the primary outlet 91B is not limited to Fig.10 For example, the primary inlet 91A may be arranged on the positive side of the Y axis relative to the power connector 7 , and the primary outlet 91B may be arranged on the negative side of the Y axis relative to the power connector 7 .

[0056] Alternatively, the two inlets 91A and 92A may be arranged on one side of the power connector 7 in the Y-axis direction, and the two outlets 91B and 92B may be arranged on the other side of the power connector 7 in the Y-axis direction.

[0057] The secondary inlet 92A and the secondary outlet 92B may be arranged on one side of the power connector 7 in the Z-axis direction. Fig.10 In the example of , the secondary inlet 92A and the secondary outlet 92B are arranged on the positive Z-axis side of the power connector 7. In other words, the secondary inlet 92A and the secondary outlet 92B are arranged closer to the upper panel 95 than the power connector 7.

[0058] Thus, by arranging the secondary inlet 92A and the secondary outlet 92B closer to the Z-axis direction than the power connector 7, the piping connected to the secondary inlet 92A and the secondary outlet 92B and the power connector 7 are less likely to interfere with each other, and the piping can be easily wound. In addition, by arranging the secondary inlet 92A and the secondary outlet 92B at a position close to the upper panel 95, it is easy for the user to operate from above.

[0059] The primary inlet 91A and the primary outlet 91B are arranged outside the secondary inlet 92A and the secondary outlet 92B in the Y-axis direction. Fig.10 In the example of FIG. 1 , the primary inlet 91A is located on the negative side of the Y axis than the secondary inlet 92B. The primary inlet 91B is located on the positive side of the Y axis than the secondary inlet 92A.

[0060] According to the above structure, two inlets 91A, 92A and two outlets 91B, 92B are arranged at positions that do not overlap in the Y-axis direction. Therefore, the pipes connected to the two inlets 91A, 92A and the two outlets 91B, 92B are not easily interfered with, and the pipes can be pulled around more easily. In addition, the distance between the secondary inlet 92A and the collection manifold 2001 and the distance between the secondary outlet 92B and the distribution manifold 2002 can be lengthened, so that space for arranging metal pipes or tubes can be ensured.

[0061] The primary inlet 91A and the primary outlet 91B may be arranged at the other side in the Z-axis direction relative to the secondary inlet 92A and the secondary outlet 92B. Fig.10 In the example, the primary inlet 91A and the primary outlet 91B are arranged on the negative side of the Z axis direction rather than the secondary inlet 92A and the secondary outlet 92B.

[0062] According to the above configuration, the pipes connected to the primary inlet 91A and the primary outlet 91B and the pipes connected to the secondary inlet 92A and the secondary outlet 92B are less likely to interfere with each other, and the pipes can be easily routed.

[0063] The protrusion amount of power connector 7 may be larger than the protrusion amount of primary inlet 91A, secondary inlet 92A, primary outlet 91B, or secondary outlet 92B from rear plate 91. Thus, the front end portion of power connector 7 is less likely to come into contact with other members.

[0064] like Fig.11A and Fig. 11BAs shown, the CDU 100 further includes a first liquid supply pipe 101A and a second liquid supply pipe 101B. The first liquid supply pipe 101A communicates with the secondary inlet 92A and protrudes from the rear plate 91. The second liquid supply pipe 101B communicates with the secondary outlet 92B and protrudes from the rear plate 91.

[0065] Alternatively, the first liquid supply pipe 101A extends to one side in the Y-axis direction, and the second liquid supply pipe 101B extends to the other side in the Y-axis direction. Fig.11A and Fig. 11B In the example, the first liquid supply pipe 101A extends to the positive direction of the Y axis, and the second liquid supply pipe 101B extends to the negative direction of the Y axis.

[0066] According to the above configuration, the first liquid supply tube 101A and the second liquid supply tube 101B extend in a direction away from the power connector 7, so that the first liquid supply tube 101A and the second liquid supply tube 101B are unlikely to interfere with each other. Therefore, it is possible to suppress complication of the piping around the power connector 7.

[0067] Alternatively, the collection manifold 2001 may be arranged on one side of the power connector 7 in the Y-axis direction, and the distribution manifold 2002 may be arranged on the other side of the power connector 7 in the Y-axis direction. Fig.11A In the example, the collection manifold 2001 is arranged on the positive side of the Y axis than the power connector 7, and the distribution manifold 2002 is arranged on the negative side of the Y axis than the power connector 7.

[0068] According to the above structure, the piping connecting the secondary inlet 92A and the collection manifold 2001, the piping connecting the secondary outlet 92B and the distribution manifold 2002, and the power connector 7 are less likely to interfere. In addition, the lengths of the first liquid supply pipe 101A and the second liquid supply pipe 101B can be shortened. In addition, compared with the case where both the collection manifold 2001 and the distribution manifold 2002 are arranged on one side in the Y-axis direction, the width of the manifolds 2001 and 2002 in the server rack SR in the X-axis direction can be reduced.

[0069] By arranging the manifolds 2001 and 2002 connected to the servers (not shown) on the rear side of the server rack SR, the first liquid supply pipe 101A and the second liquid supply pipe 101B can be shortened.

[0070] In addition, if Fig. 11B As shown, the first liquid supply pipe 101A and the second liquid supply pipe 101B may be arranged on one side in the X-axis direction (the positive direction side in the X-axis direction) relative to the power connector 7 in the X-axis direction.

[0071] The two inlet ports 91A and 92A and the two outlet ports 91B and 92B are connected to the flow pipes 11 and 21 and the flow pipes 13 and 25 in the CDU 100 in a manner that allows flow. Figures 12A to 12C ) connection. The connection ports of each inlet and each outlet with the flow pipe are arranged so as not to overlap with the heat exchanger 3 and the power connector 7 in the X-axis direction. Specifically, the connection ports of each inlet and each outlet with the flow pipe can also be arranged between the heat exchanger 3 and the power connector 7. According to the above structure, no matter where the manifolds 2001 and 2002 are arranged in the Y-axis direction, the length of the piping can be fully obtained, and the operability is improved. In addition, since the connection ports of the piping and the CDU 100 are arranged so as not to overlap with the heat exchanger 3 and the power connector 7 in the Y-axis direction, the flow pipes 11 to 13 and the flow pipes 21 to 25 in the CDU 100 can be freely arranged.

[0072] The secondary inlet 92A and the secondary outlet 92B may also be connected to the manifolds 2001 and 2002 via a ball valve. The size of the ball valve may be changed according to the flow rate of the circulating refrigerant. In the case of an increase in flow rate, it is ideal to use a large valve to reduce pressure loss. In this embodiment, a 1.5-inch or 2-inch ball valve is used, but a 1-inch ball valve may also be used depending on the storage in the server rack SR.

[0073] <2-3. Primary flow path> Next, refer to Figures 12A to 12C The primary flow channel 1 according to the embodiment will be described. Fig. 12A yes Figure 7 XX line cross-sectional view. Fig. 12B yes Figure 7 XI-XI line cross-sectional view. Fig. 12C yes Figure 7 In addition, Fig. 12C In the figure, the primary flow path 1 is indicated by a dotted arrow. The direction of the dotted arrow is the flow direction of the refrigerant. Fig. 12C As shown, the primary flow path 1 is composed of a manifold 1M and flow tubes 11 to 13. The internal space of the manifold 1M is a flow path for the primary refrigerant, and the internal spaces of the flow tubes 11 to 13 are also flow paths for the primary refrigerant.

[0074] The manifold 1M has one inlet and two outlets. The primary refrigerant flowing in from the inlet of the manifold 1M is branched inside the manifold 1M and flows out from the two outlets of the manifold 1M.

[0075] The flow tube 11 has a bent portion and a straight tube portion. The bent portion of the flow tube 11 is a curved tube that bends the flow direction of the primary refrigerant from the X-axis direction to the Y-axis direction by about 45 degrees. The bent portion of the flow tube 11 is connected to the straight tube portion of the flow tube 11. The straight tube portion of the flow tube 11 extends obliquely relative to the X-axis direction. One side of the straight tube portion of the flow tube 11 in the X-axis direction (the positive side of the X-axis) is connected to the bent portion of the flow tube 11. The other side of the straight tube portion of the flow tube 11 in the X-axis direction (the negative side of the X-axis) is connected to the inlet of the manifold 1M. The flow tube 11 allows the primary refrigerant flowing in from the primary inlet 91A to flow into the inlet of the manifold 1M.

[0076] The flow tube 12 has a straight tube portion and a bent portion. The straight tube portion of the flow tube 12 extends linearly along the X-axis direction. One side of the straight tube portion of the flow tube 12 in the X-axis direction (the positive side of the X-axis direction) is connected to one of the outlets of the manifold 1M. The other side of the straight tube portion of the flow tube 12 in the X-axis direction (the negative side of the X-axis direction) is connected to the bent portion of the flow tube 12. The bent portion of the flow tube 12 is a curved tube that bends the flow direction of the primary refrigerant from the X-axis direction to the Y-axis direction by 90°. The bent portion of the flow tube 12 is connected to the heat exchanger 3 in the Y-axis direction. The bent portion of the flow tube 12 causes the primary refrigerant flowing in the straight tube portion of the flow tube 12 along the X-axis direction to bend 90° in the Y-axis direction and flow into the heat exchanger 3.

[0077] The flow pipe 13 is a curved pipe that bends the flow direction of the primary refrigerant by 90° from the Y-axis direction to the X-axis direction. The flow pipe 13 is connected to the heat exchanger 3 along the Y-axis direction and connected to the primary outlet 91B along the X-axis direction. The flow pipe 13 bends the primary refrigerant flowing from the heat exchanger 3 along the Y-axis direction by 90° toward the X-axis direction and flows out to the primary outlet 91B.

[0078] The primary flow passage 1 further includes a bypass pipe 14. Of the two outflow ports of the manifold 1M, an outflow port different from the outflow port connected to the flow pipe 12 is connected to the flow pipe 13 via the bypass pipe 14. The bypass pipe 14 allows the primary refrigerant to flow from the manifold 1M to the flow pipe 13.

[0079] In addition, the flow pipe 12 is provided with a control valve V1 for controlling the flow rate of the primary refrigerant in the flow pipe 12. The bypass pipe 14 is provided with a control valve V2 for controlling the flow rate of the primary refrigerant in the bypass pipe 14. In this structure, by controlling the openings of the control valves V1 and V2, the inflow amount of the primary refrigerant into the heat exchanger 3 can be adjusted. That is, the heat exchange performance of the primary refrigerant and the secondary refrigerant in the heat exchanger 3 can be adjusted.

[0080] The control valves V1 and V2 are, for example, electromagnetic two-way valves, and the openings of the control valves V1 and V2 can be adjusted by the control unit 6 .

[0081] In addition, here, an example is shown in which the control valves V1 and V2 are provided as two two-way valves, but the number of the control valves is not limited thereto. For example, the bypass pipe 14 can be utilized by using a three-way valve instead of the two control valves V1 and V2. In this way, the number of control valves used can be reduced, and the cost can be reduced.

[0082] Instead of providing the bypass pipe 14, a two-way valve can be used to control the opening of the two-way valve to adjust the amount of primary refrigerant flowing into the heat exchanger 3. However, when the opening of the control valve is reduced, a water hammer phenomenon may occur.

[0083] Although not shown in the drawings, a temperature sensor, a flow rate sensor, and the like may be provided in the flow path of the primary refrigerant in the CDU 100 .

[0084] <2-4. Secondary flow path> Next, refer to Figures 12A to 12C The secondary flow path 2 of the embodiment will be described. Figures 12A to 12C In FIG. 1 , the secondary flow path 2 is indicated by a solid arrow. The direction of the arrow is the flow direction of the refrigerant. The secondary flow path 2 is divided into an inlet side (refer to Fig. 12B and Fig. 12C ) and outlet side (refer to Fig. 12A ). The inlet side of the secondary flow path 2 guides the secondary refrigerant from the secondary inlet 92A to the heat exchanger 3, and guides the secondary refrigerant from the heat exchanger 3 to the pump unit 4. The outlet side of the secondary flow path 2 guides the secondary refrigerant from the pump unit 4 to the secondary outlet 92B. The secondary flow path 2 will be described below in terms of the inlet side and the outlet side.

[0085] like Fig. 12B and Fig. 12C As shown, the inlet side of the secondary flow path 2 is composed of a manifold 2MA and flow tubes 21 to 23. The internal space of the manifold 2MA is a flow path for the secondary refrigerant, and the internal spaces of the flow tubes 21 to 23 are also flow paths for the secondary refrigerant.

[0086] The manifold 2MA has one inlet and multiple outlets. The number of the outlets of the manifold 2MA is the same as the number of pump units 4. When the number of pump units 4 is two, the manifold 2MA has two outlets. The secondary refrigerant flowing in from one inlet of the manifold 2MA branches inside the manifold 2MA and flows out from the multiple outlets of the manifold 2MA.

[0087] The flow tube 21 is a curved tube that bends the flow direction of the secondary refrigerant by 90° from the X-axis direction to the Y-axis direction. The flow tube 21 is connected to the secondary inlet 92A along the X-axis direction and connected to the heat exchanger 3 along the Y-axis direction. The flow tube 21 bends the secondary refrigerant flowing in from the secondary inlet 92A along the X-axis direction by 90° in the Y-axis direction and flows into the heat exchanger 3.

[0088] The flow tube 22 has a bent portion and a straight tube portion. The bent portion of the flow tube 22 is a curved tube that bends the flow direction of the secondary refrigerant from the Y-axis direction to the X-axis direction by about 45 degrees. The bent portion of the flow tube 22 is connected to the straight tube portion of the flow tube 22. The straight tube portion of the flow tube 22 extends obliquely relative to the X-axis direction. One side of the straight tube portion of the flow tube 22 in the X-axis direction (the positive direction side of the X-axis) is connected to the inlet of the manifold 2MA. The other side of the straight tube portion of the flow tube 22 in the X-axis direction (the negative direction side of the X-axis) is connected to the heat exchanger 3. The flow tube 22 allows the secondary refrigerant flowing in from the heat exchanger 3 to flow into the inlet of the manifold 2MA.

[0089] A flow tube 23 is allocated to each pump unit 4. Each flow tube 23 is a straight tube extending in the X-axis direction. The end of each flow tube 23 on one side in the X-axis direction (on the positive side in the X-axis direction) is connected to different outlets of the manifold 2MA. The end of each flow tube 23 on the other side in the X-axis direction (on the negative side in the X-axis direction) is connected to the corresponding pump unit 4. Each flow tube 23 allows the secondary refrigerant to flow from the manifold 2MA into the corresponding pump unit 4.

[0090] like Fig. 12A As shown, the outlet side of the secondary flow path 2 is composed of a manifold 2MB, a flow path tube 24, and a flow path tube 25. The manifold 2MB has a plurality of inlets and a flow outlet. The number of inlets of the manifold 2MB is the same as the number of pump units 4. When the number of pump units 4 is two, the number of inlets of the manifold 2MB is two. The secondary refrigerants flowing in from the plurality of inlets of the manifold 2MB merge inside the manifold 2MB and flow out from a flow outlet of the manifold 2MB.

[0091] A flow tube 24 is allocated to each pump unit 4. Each flow tube 24 is a straight tube extending linearly along the X-axis direction. The end of each flow tube 24 on one side of the X-axis direction (the positive direction side of the X-axis) is connected to the different inlet ports of the manifold 2MB. The end of each flow tube 24 on the other side of the X-axis direction (the negative direction side of the X-axis) is connected to the corresponding pump unit 4. Each flow tube 24 allows the secondary refrigerant to flow from the corresponding pump unit 4 into the manifold 2MB.

[0092] The flow tube 25 is a straight tube extending linearly along the X-axis direction. The end of the flow tube 25 on one side in the X-axis direction (the positive side in the X-axis direction) is connected to the secondary flow outlet 92B. The end of the flow tube 25 on the other side in the X-axis direction (the negative side in the X-axis direction) is connected to the flow outlet of the manifold 2MB. The flow tube 25 allows the secondary refrigerant to flow from the flow outlet of the manifold 2MB to the secondary flow outlet 92B. As a result, the secondary refrigerant flows out from the secondary flow outlet 92B, and the secondary refrigerant flows into the cooling unit 1001 (refer to Figure 1 ).

[0093] Although not shown, a temperature sensor, a flow sensor, etc. may be provided in the secondary refrigerant flow path in CDU 100. In particular, by measuring the temperature of the refrigerant flowing out of the heat exchanger 3, the temperature of the refrigerant flowing through each server can be grasped, and the cooling performance can be estimated.

[0094] <2-5. Pump unit> Next, refer to Fig.13 The pump unit 4 according to the embodiment will be described. Fig.13 It is a perspective view showing the pump unit 4 and its peripheral components according to the embodiment.

[0095] The pump unit 4 is connected to the CDU 100 in a pluggable manner. The pump unit 4 and the CDU 100 are connected via a connector 42, so that refrigerant leakage during plugging and unplugging can be suppressed. Even in the case of refrigerant leakage due to poor connection of the connector 42, by providing a liquid receiving pan 98 under the connection portion of the connector 42, it is possible to suppress the refrigerant from spreading outside the device of the CDU 100. Poor connection of the connector 42 is caused by the tilted movement of the pump unit 4 when plugging and unplugging, so a guide rail 43 is provided for moving the pump unit 4 straight.

[0096] Fig.13 In the embodiment, only one guide rail 43 is provided on the lower surface of the CDU 100, that is, the bottom plate 96, but a plurality of guide rails 43 may be provided, or they may be provided on only the upper surface, or on both the lower surface and the upper surface. The guide rail 43 is inclined relative to the opening for the pump unit 4 so that the opening is enlarged, and the pump unit 4 is easily inserted.

[0097] The connection can be made by providing a floating mechanism at the coupler 42 on the CDU 100 side to absorb a small displacement of the pump unit 4 .

[0098] Since the control substrate (not shown) of the pump unit 4 is arranged above the pump, even when liquid leaks from the pump, it is possible to suppress a malfunction caused by the refrigerant.

[0099] The pump unit 4 includes a resin cover (not shown) for protecting the control substrate and wiring.

[0100] The upper portion of the bottom plate 96 of the CDU 100 that contacts the lower surface of the pump unit 4 is formed of a resin plate, so that the pump unit 4 can be inserted and removed with less friction. Examples of the plate include PTFE and PFA.

[0101] <2-5-1. Pump unit handle> Next, refer to Fig.14A and Fig. 14B The handle 41 of the pump unit 4 according to the embodiment will be described. Fig.14A It is a perspective view showing the pump unit 4 according to the embodiment. Fig. 14B It is a cross-sectional perspective view showing a fitting portion between the pump unit 4 and the frame 9 according to the embodiment.

[0102] like Fig.14A As shown in FIG. 1 , the pump unit 4 includes a handle 41. The handle 41 is an example of a movable portion. The handle 41 is rotatably fixed to both side surfaces of the pump unit 4.

[0103] The handle 41 includes a handle working portion 411, two handle side portions 412, a rotation support portion 413, and a facing portion 414. The handle working portion 411 is located outside the frame 9 when the pump unit 4 is inserted into the frame 9. The handle working portion 411 is in a convex shape, thereby improving the workability and suppressing the deformation caused by external force.

[0104] The two handle side parts 412 are respectively located on the two side surfaces of the pump unit 4. One end of the handle side part 412 is connected to the handle working part 411, and the other end is fixed to the side surface of the pump unit 4 by the rotation support part 413. At the other end of the handle side part 412, a relative part 414 is provided which is opposite to the protrusion 99 of the frame 9.

[0105] The handle 41 can be displaced between a first position and a second position. Specifically, when the handle 41 is in the first position, the two handle side portions 412 extend in a direction (X-axis direction) orthogonal to the front wall 47 of the pump unit 4, and accordingly, the handle working portion 411 is located at a position closer to the front side (X-axis negative direction side) than the front wall 47. On the other hand, when the handle 41 is in the second position, as shown in FIG. Fig.14A As shown, the two handle side portions 412 extend along the two side surfaces of the pump unit 4, respectively, and accordingly, the handle working portion 411 is located at the lower portion of the front wall 47. When the handle 41 is located at the first position, the handle working portion 411 is located at the upper side (Z-axis positive direction side) compared to when the handle 41 is located at the second position. That is, when the handle 41 is located at the first position, the handle 41 is in an ascending state, and when the handle 41 is located at the second position, the handle 41 is in a descending state. The handle side portion 412 rotates around a rotation axis extending in a direction intersecting the plugging and unplugging direction (Y-axis direction) through the rotating support portion 413, thereby enabling the handle 41 to be displaced between the first position and the second position.

[0106] Furthermore, the frame body 9 includes a convex portion 99 that protrudes in a direction intersecting the insertion and removal direction of the pump unit 4 .

[0107] <2-5-2. Inserting the pump unit> Next, the procedure of inserting the pump unit 4 according to the embodiment will be described.

[0108] First, the pump unit 4 is inserted into the CDU 100 with the handle 41 raised. Next, when the distance between the front plate 92 of the CDU 100 and the front wall 47 of the pump unit 4 is about 10 mm, the pump unit 4 is pushed down while the handle 41 is inserted into the CDU 100. At this time, the facing portion 414 of the handle 41 contacts the convex portion 99 of the frame 9 of the CDU 100. By lowering the handle 41, the pump unit 4 is inserted with the convex portion 99 as a fulcrum.

[0109] When the handle 41 is lowered, the relative portion 414 is located closer to the inside of the insertion direction of the pump unit 4 (the positive direction of the X-axis) than the protrusion 99, so that the relative portion 414 and the protrusion 99 overlap in the insertion and removal direction of the pump unit 4 (the X-axis direction), that is, they are relative to each other, and the pump unit 4 cannot be pulled out from the CDU 100.

[0110] When the handle 41 is completely lowered and the movement of the pump unit 4 is restricted, the fixing screws 45 are tightened at 1.5 N·m±5% in a random order. The restriction of the movement of the pump unit 4 will be described later.

[0111] The pump unit 4 includes two rotation support parts 413 , thereby preventing the pump unit 4 from being displaced in a direction (Y-axis direction) perpendicular to the insertion and removal direction due to force applied to only one rotation support part 413 when the handle 41 is lowered.

[0112] <2-5-3. Removal of the pump unit> Next, the procedure of removing the pump unit 4 according to the embodiment will be described.

[0113] First, the three fixing screws 45 of the front wall 47 of the pump unit 4 are loosened in random order using a screwdriver. Next, while the handle 41 is pressed, the operation portion 461 is lowered to raise the handle 41. At this time, by pulling the handle 41 toward the front side of the CDU 100, the handle 41 rotates around the rotation support portion 413, and the handle 41 moves from the second position to the first position. As a result, the opposing portion 414 of the handle side portion 412 and the convex portion 99 do not overlap in the insertion and removal direction of the pump unit 4, that is, they are not opposite to each other, and the pump unit 4 can be removed from the CDU 100. In addition, the operation portion 461 is described below.

[0114] When the handle 41 is completely raised, the pump unit 4 is pulled out from the CDU 100 by holding the handle operating portion 411 .

[0115] In addition, within ten seconds after the pump unit 4 is unplugged, the CDU 100 may be shut down, so the insertion of the pump unit 4 may be restricted. This is to prevent the following situation: when the pump unit 4 is inserted, hot plug connection is performed, and electric sparks are generated between the terminals of the energized part, thereby damaging the circuit. In addition, in this case, whether the pump unit 4 is in a state where it can be inserted can be displayed on the touch screen 8.

[0116] In addition, the user uses an antistatic wrist strap when plugging and unplugging the pump unit 4. In addition, when plugging and unplugging the pump unit 4, the operation or power supply of the pump unit 4 to be replaced is stopped in advance via the touch screen 8, etc., and the control state is transferred to a replaceable state.

[0117] <2-5-4. Restrictions on pump units> Next, refer to Fig.15A , Fig. 15B and Fig.16 The restriction of the movement of the pump unit 4 according to the embodiment will be described. Fig.15A 1 is a cross-sectional perspective view showing the handle operating portion 411 of the pump unit 4 according to the embodiment. Fig. 15B It is a cross-sectional perspective view showing a restricted state of the pump unit 4 according to the embodiment. Fig.16 It is a perspective view showing a restricted state of the pump unit 4 according to the embodiment.

[0118] like Fig.14A and Fig. 14B As shown, the pump unit 4 includes a restriction portion 46 that restricts the handle 41 from moving toward the first position when the handle 41 is located at the second position. In other words, the restriction portion 46 restricts the handle 41 from rising when the handle 41 is in a lowered state.

[0119] The restricting portion 46 includes an operating portion 461, an elastic member 462, and a plate portion 463. The operating portion 461 can be displaced between the third position and the fourth position. Specifically, when the operating portion 461 is in the third position, Fig.14A As shown in FIG. 4 , the operating portion 461 is located on the positive side of the Z axis in the through hole 472 of the front wall 47. The so-called fourth position of the operating portion 461 is a position where the operating portion 461 is located on the negative side of the Z axis in the through hole 472 of the front wall 47. That is, when the operating portion 461 is located at the third position, the operating portion 461 is in an ascending state, and when the operating portion 461 is located at the fourth position, the operating portion 461 is in a descending state.

[0120] The elastic member 462 applies force to the operating portion 461 in the direction from the fourth position toward the third position (Z-axis positive direction). Fig. 15BAs shown, the plate portion 463 is connected to the operation portion 461 on the back side of the front wall 47 of the pump unit 4 .

[0121] The restricting portion 46 restricts the movement of the handle 41 to the first position by moving the operating portion 461 from the fourth position to the third position as the handle 41 moves from the first position to the second position. On the other hand, when the operating portion 461 moves from the third position to the fourth position, the restriction on the movement of the handle 41 to the first position is released.

[0122] The CDU 100 of this embodiment includes the restricting portion 46, which can prevent the handle 41 from moving to the first position due to erroneous operation and causing the pump unit 4 to fall out of the CDU 100. In addition, since the restricting portion 46 includes the operating portion 461, the state of the restricting portion 46 can be changed by user operation.

[0123] In addition, if Fig.15A As shown, the handle operation part 411 includes a penetration part 4111 inserted into a penetration hole 471 provided on the front wall 47 of the pump unit 4. The penetration part 4111 includes an inclined part 4112 inclined in the direction of insertion into the penetration hole 471 and an opposing part 4113 not inclined.

[0124] After the pump unit 4 is inserted into the CDU 100, when the handle 41 is lowered, the through portion 4111 of the handle working portion 411 is inserted into the through hole 471, and the plate portion 463 and the opposing portion 4113 are opposite to each other in the insertion and extraction direction (X-axis direction). The operating portion 461 and the plate portion 463 are pulled upward in the vertical direction (Z-axis positive direction side) by the elastic member 462. As long as the user does not lower the operating portion 461, at least a portion of the plate portion 463 is in a state of being located opposite to the through hole 471 (refer to Fig. 15B ). Therefore, the handle 41 is restrained from rising. In other words, the movement of the handle 41 to the first position is restricted.

[0125] That is, when the penetration portion 4111 passes through the through hole 471 , the opposing portion 4113 faces the plate portion 463 in the insertion and removal direction. Therefore, unless the user lowers the operation portion 461 , the penetration portion 4111 is prevented from coming out of the through hole 471 .

[0126] When the user lowers the operation portion 461 , the elastic member 462 extends and the plate portion 463 also lowers and no longer faces the opposing portion 4113 . Therefore, the penetration portion 4111 can be removed from the penetration hole 471 , and the handle 41 can be moved.

[0127] <2-6. Injection hole and tank> Next, refer to Figures 17A to 17C The injection hole 105 and the tank 5 according to the embodiment will be described. Fig.17AIt is a perspective view showing the injection hole 105 and its peripheral components according to the embodiment. Fig. 17B It is a top view showing the tank 5 according to the embodiment. Fig. 17C yes Fig. 17B Cross-sectional view along line XVII-XVII.

[0128] The CDU 100 includes a refrigerant injection hole 105 on the rear panel 91. The injection hole 105 can be connected to the secondary flow path 2 (see Figures 12A to 12C ) is connected to circulate the injected refrigerant. The injection hole 105 is equipped with a connector, and the refrigerant can be injected by installing the corresponding connector.

[0129] The tank 5 includes a tank injection hole 51 , an air extraction valve 53 , and a liquid level confirmation window 52 .

[0130] A coupler corresponding to the coupler on the tank 5 side is attached to the tank injection hole 51 , and the refrigerant is injected into the tank 5 .

[0131] The air extraction valve 53 can release the gas to the outside by opening the air extraction valve 53 when the gas is accumulated in the tank 5 .

[0132] The liquid level confirmation window 52 is provided with a window that allows confirmation of the material inside the tank 5 , so that the liquid level can be confirmed. Since the window 52 is exposed from the rear panel 91 of the CDU 100 , the liquid level can be confirmed without moving the CDU 100 .

[0133] The tank 5 is further provided with a liquid level sensor 67 (see Figure 4 and Figure 8 ) When the liquid level of the refrigerant in the tank 5 is lower than a threshold value, the liquid level sensor 67 sends a notification to the control unit 6 .

[0134] In addition, the injection hole 105 and the tank injection hole 51 may be covered with a cover member or the like when not in use.

[0135] In this embodiment, the tank 5 can store about 3L (volume: 564mm*190mm*40mm) of refrigerant, and the refrigerant replenishment frequency can be reduced by increasing the storage amount of the tank 5. The tank 5 is connected to the secondary refrigerant flow pipe 25 via a hole portion (not shown) provided on the lower surface, and when the circulating secondary refrigerant decreases, the refrigerant in the tank 5 is cyclically replenished. In this way, the flow rate of the circulating secondary refrigerant can be kept constant.

[0136] <2-7. Control unit> Next, refer to Fig.18A and Fig.18B The configuration of the control unit 6 according to the embodiment will be described. Fig.18A It is a perspective view showing the structure of the control unit 6 according to the embodiment. Fig.18B1 is a schematic cross-sectional view showing the holding portion 61 of the control unit 6 according to the embodiment and its peripheral members.

[0137] The control unit 6 controls the pump unit 4 and the control valves V1 and V2 (see Fig. 12C ) and other actions, monitoring of action status, monitoring of various sensors, and communication with external devices.

[0138] In this embodiment, the CDU 100 includes two control units 6. By including two control units, even if one fails, the other can be operated to continue the operation. In addition, the control unit 6 is configured to be pluggable while powered, so that the failed control unit 6 can be replaced while the CDU 100 is in operation.

[0139] The control unit 6 has a protrusion 63 and a picking hole 62 at the upper center, which can improve the workability during replacement. No electronic components or circuits are configured around the picking hole 62 and the protrusion 63, thereby preventing malfunctions caused by contact with the user's hand.

[0140] The control unit 6 is fixed in a pluggable manner by providing holding portions 61 on both sides of the length direction of the control unit 6. Even when the control unit 6 is inserted into the holding portion 61 by snapping, it can be pulled out by providing an inclined portion 612 on the surface facing the claw portion 611 of the holding portion 61 of the control unit 6 from the insertion direction side. In addition, since the operation for plugging and pulling out only moves the control unit 6 up and down, the operation can be performed with one hand.

[0141] like Fig.18A As shown, the connection substrate 60 of the control unit 6 can be arranged substantially horizontally in the vertical direction. However, it can also be arranged in the horizontal direction. When arranged in the vertical direction, the vertical length of the connection substrate 60 is shorter than the vertical length of the arrangement space in the CDU 100, so it can be arranged so as not to contact the upper panel 95 and the lower panel 96 of the CDU 100. Therefore, it is possible to suppress the vibration of the CDU 100 from being transmitted to the control unit 6. In addition, by arranging the connection substrate 60 in the vertical direction, the width in the horizontal direction can be shortened, and the arrangement space for other components can be increased.

[0142] <2-7-1. Insertion and removal of control unit> Next, refer to Figures 19A to 19D The procedure of inserting and removing the control unit 6 according to the embodiment will be described. Figures 19A to 19D It is a diagram for explaining the procedure of inserting and removing the control unit 6 according to the embodiment.

[0143] First, confirm the position of the control unit 6 to be replaced from the touch screen 8 or the like (see Fig.19A). Two control units 6 are arranged in the CDU 100, and the operation status of each control unit 6 can be checked.

[0144] Next, the screws 601 fixing the front panel 92 of the frame 9 are loosened and removed. Next, since the touch screen 8 is in the shape of a door that can be opened and closed, the control unit door 602 is opened (see Fig.19B ).

[0145] Next, the pinching hole 62 (see Fig.18A ) Grasp and lift (cf. Fig.19C ). Next, insert the new control unit 6 along the holding portion 61 (refer to Fig.19D ) until a click sound is heard from the holding portion 61. Then, the control unit door 602 is closed and the fixing screws 601 are tightened.

[0146] In addition, if Fig.19B As shown, the connection substrate 60 can also be arranged in the horizontal direction. In addition, when the connection substrate 60 is arranged in the vertical direction, the procedure of inserting and removing the control unit 6 does not change.

[0147] In addition, the touch panel 8 and the control substrate 603 of the touch panel 8 are fixed to the control unit door 602 in an insulated manner.

[0148] <2-7-2. Configuration of control unit> Next, refer to Fig. 20A and Fig. 20B The configuration of the control unit 6 according to the embodiment will be described. Fig. 20A and Fig. 20B It is a schematic perspective view of the control unit 6 and its peripheral components according to the embodiment.

[0149] The control unit 6 and the connection substrate 60 are connected to a front panel 92 having the touch panel 8 and assembled in the CDU 100. The connection substrate 60 is connected to a fixing plate 69. The fixing plate 69 is fixed to the front panel 92.

[0150] During the assembly work of the CDU 100 , after the heat exchanger 3 is arranged in the CDU 100 , the front panel 92 is attached, thereby preventing the control unit 6 and the touch screen 8 from being damaged due to contact with other components.

[0151] <2-8. Power connector> Next, refer to Figures 21A to 21C The power connector 7 according to the embodiment will be described. Figures 21A to 21C : is a schematic top view of the power connector 7 and its surrounding components of the embodiment. Fig.21A The power connector 7 is shown when it is not connected to the power supply PS in the server rack SR. Fig. 21B and Fig. 21C The power connector 7 is shown when being connected to the power supply PS in the server rack SR.

[0152] The power connector 7 can be connected to an external power supply PS. The CDU 100 includes the power connector 7 on the rear side. The power connector 7 is connected to the power supply PS provided on the rear side of the server rack SR, thereby supplying power to the CDU 100.

[0153] like Fig. 21C As shown, the CDU 100 is provided with positioning protrusions 71 on both side surfaces of the back side. Specifically, the CDU 100 is provided with positioning protrusions 71 at positions close to the back panel 91 in the plate 93. Similarly, the CDU 100 is provided with positioning protrusions 71 at positions close to the back panel 91 in the plate 94. When the CDU 100 is inserted into the server rack SR, the positioning protrusions 71 contact with the server (not shown), thereby preventing the CDU 100 from being over-inserted into the server rack SR. Therefore, it is possible to prevent the power connector 7 and the power supply PS from being damaged due to excessive contact.

[0154] The shape of the power connector 7 may be a trapezoidal shape in a plan view. In other words, the width of the front end of the power connector 7 may be narrower than the width of the base end of the power connector 7. According to the above structure, the power connector 7 can be prevented from contacting the surrounding members.

[0155] The power connector 7 can be plugged in and out of the power supply PS in conjunction with the insertion and removal of the CDU 100 from the server rack SR. The power connector 7 and the power supply PS can be positioned in depth by the positioning protrusion 71 .

[0156] <2-9. Touch screen> Next, the touch screen 8 of the embodiment will be described. Figure 4 and Figure 6 ) is provided on the front panel 92 of the CDU 100. The touch screen 8 and the control unit 6 (refer to Fig. 20A ) is connected. The control unit 6 displays various information on the touch screen 8. The touch screen 8 can display, for example, a status or control portion (Japanese: コントロールセクション) indicating the operating status of the pump unit 4, the temperature of the refrigerant, and the like, and a navigation menu.

[0157] Here, refer to Fig. 22 An example of information displayed by the control unit 6 will be described. Fig. 22An example of information displayed on the touch screen 8 of the embodiment will be described. For example, the user selects tabs 81 to 87 displayed on the touch screen 8 by touch operation, etc., to switch the information displayed on the touch screen 8. The following describes the information displayed or the information that can be set when each tab 81 to 87 is selected.

[0158] The status tab 81 displays detailed operating information of the internal components. It consists of system status, device status, and sensor values ​​(see Fig. 22 ).

[0159] In the alarm setting tag 82, system parameters for notifying system alarms or warning states can be set. When the parameters are exceeded, an alarm based on a predetermined method is output. Specifically, parameters such as the liquid temperature of the refrigerant, the air temperature of the server room, humidity, leakage sensor, refrigerant, flow rate changes, and the operating conditions of the pump unit 4, power connector 7, control unit 6, or control valves V1 and V2 can be set.

[0160] In the network setting tab 83 , the network configuration for remote access to the CDU 100 can be confirmed or set.

[0161] In the system setting tab 84, for example, subject information, password, date and time, debug mode, screen saver, or system status can be set.

[0162] In the control setting tag 85 , information related to the control of the network interface and the control of the operation of the CDU 100 can be set.

[0163] In the software update tab 86, the software modules in the CDU 100 can be updated as needed. The software update tab 86 is only available in a web browser-based network access.

[0164] A maintenance mode for limiting the items displayed on the touch screen 8 may also be provided. In the maintenance mode, only items and labels used by each user are displayed, and unused information is not displayed. As a result, the user can easily find the required information with improved visual confirmation. For example, the maintenance mode can be switched on and off from the display item setting label 87.

[0165] Furthermore, by connecting the CDU 100 to a network, the information displayed on the touch screen 8 can be checked from an external device.

[0166] <3. Other specifications> <3-1. Primary refrigerant flow rate and flow sensor specifications> Next, refer to Fig. 12CThe flow rate of the primary refrigerant and the specifications of the flow sensor 16 are described. In the present embodiment, the maximum flow rate of the primary refrigerant is 150 to 170 L / min. In addition, the flow rate of the primary refrigerant can be changed to match the required maximum cooling performance. For example, in the case where the maximum cooling performance is desired to be improved compared to the present embodiment, the secondary refrigerant can be further cooled by increasing the flow rate of the primary refrigerant, thereby improving the cooling performance of each server.

[0167] If the flow rate of the primary refrigerant is too high relative to the required cooling performance, the pressure will increase, which may cause damage. Therefore, it is necessary to appropriately set the maximum refrigerant flow rate.

[0168] The maximum measurement level of the flow sensor 16 that is provided in the CDU 100 and measures the flow rate of the primary refrigerant is set to be larger than the maximum flow rate of the primary refrigerant. In the present embodiment, it is desirable that the maximum measurement level is 200 L / min or more.

[0169] <3-2. Power distribution board> Next, refer to Fig. 12A The power distribution board 31 of the embodiment is described. The power distribution board 31 supplies electricity supplied from the power connector 7 to the pump unit 4, the control valves V1 and V2, and each sensor, etc. In addition to distributing electricity, the power distribution board 31 may also have the functions of relaying the sensor and the control unit 6, controlling the pump unit 4, etc.

[0170] The power distribution board 31 is arranged on the back side of the CDU 100. Therefore, the power supply wiring from the power connector 7 to the power distribution board 31 can be made shorter than in other arrangements. By shortening the wiring, contact with the flow tubes 11 to 13 and the flow tubes 21 to 25 can be suppressed, and a countermeasure against noise can be achieved.

[0171] Alternatively, the power distribution board 3 may be disposed around the control unit 6. In this case, the space around the power connector 7 can be expanded, thereby increasing the degree of freedom in the arrangement design of the flow tubes 11 to 13 and the flow tubes 21 to 25.

[0172] In addition, the prevention performance can be improved by performing waterproofing treatment such as potting.

[0173] <3-3. Specifications of heat exchanger> Next, the specifications of the heat exchanger 3 of the embodiment are described. The heat exchanger 3 in the present embodiment has a size of, for example, 526 mm in width, 119 mm in depth, and 120 mm in height. The size of the heat exchanger 3 is changed according to the required cooling performance, the flow rate of the primary refrigerant, the flow rate of the secondary refrigerant, and the flow resistance of each flow path pipe. For example, even if the same cooling performance as in the present embodiment is required, the size of the heat exchanger 3 can be miniaturized by increasing the flow rate of the primary refrigerant.

[0174] <3-3. Specifications of flow tubes> Next, refer to Figures 12A to 12C The specifications of the flow pipes 11 to 13 and the flow pipes 21 to 25 are described. When the diameters of the flow pipes 11 to 13 and the flow pipes 21 to 25 are large, the pressure loss can be reduced, which is ideal. In order to detect the leakage of the refrigerant from the flow pipes 11 to 13 and the flow pipes 21 to 25, leakage sensors (not shown) may also be provided on the flow pipes 11 to 13 and the flow pipes 21 to 25.

[0175] The diameters of the flow tubes 11 to 13 and the flow tubes 21 to 25 can be changed according to the locations where they are arranged. In the present embodiment, the diameters of the flow tubes 23 and 24 are made larger. The above-mentioned parts have components that serve as couplers. When the diameters are the same as those of other flow tubes, the flow resistance is large. Therefore, by setting the diameters larger, the flow resistance can be reduced. Specifically, the diameters of the flow tubes 23 and 24 are set to 50 to 58 mm, and the diameters of the other flow tubes are set to 40 to 48 mm.

[0176] The flow pipes 11 and 22 arranged on the side opposite to the heat exchanger 3 across the power connector 7 have straight pipe portions extending obliquely with respect to the X-axis direction when viewed from above. This can shorten the length of the primary flow path 1 or the secondary flow path 2. In addition, the flow resistance can be suppressed compared to the case where the flow pipe is bent at a right angle.

[0177] The flow tubes 11 to 13 and the flow tubes 21 to 25 may be made of metal or resin. In the case of resin, the flexibility is better than that of metal tubes, it is easy to draw and the workability is excellent. In the case of metal, it is easier to seal the connection part than the resin material, and the reduction of the refrigerant can be suppressed.

[0178] <3-5. Control valve control specifications> Next, the control valves V1 and V2 (see Fig. 12C) is described below. In this embodiment, the temperature of the secondary refrigerant can be adjusted by controlling the control valves V1 and V2. The control criteria of the control valves V1 and V2 can, for example, control the temperature of the secondary refrigerant to reach an arbitrary temperature set by the user. In addition, in another example, the dew point in the CDU 100 can be measured, and the temperature of the secondary refrigerant can be controlled so that it does not fall below the dew point. Regarding the control of the temperature, it can be control based on only one of the above-mentioned parties, or it can be control based on satisfying both parties.

[0179] Specifically, the method of controlling the temperature of the secondary refrigerant is to reduce the flow rate of the primary refrigerant flowing into the heat exchanger 3 when the temperature of the secondary refrigerant is increased, and to increase the flow rate of the primary refrigerant flowing into the heat exchanger 3 when the temperature of the secondary refrigerant is decreased. By controlling the temperature of the refrigerant so as not to be lower than the dew point, it is possible to suppress the generation of water droplets in the CDU 100, and to suppress damage to the control unit 6, the power distribution board 31, etc. In addition, by controlling the temperature of the secondary refrigerant to be below an arbitrary temperature, it is possible to ensure that the cooling performance of the cold plate 1002 is high.

[0180] <3-6. Liquid receiving tray and liquid outlet> Next, refer to Fig.23 The liquid receiving pan 98 and the liquid outlet 97 according to the embodiment will be described. Fig.23 It is a perspective view showing the liquid outlet 97 and its peripheral components according to the embodiment.

[0181] The CDU 100 also includes a liquid receiving pan 98 (see Fig.13 ) and a liquid outlet 97. A liquid receiving pan 98 is arranged on the bottom of the CDU 100, that is, on the entire surface of the plate 96, except for the area where the inserted pump unit 4 is arranged.

[0182] The liquid outlet 97 is provided on the back panel 91 of the CDU 100 and is connected to the liquid receiving pan 98. When the refrigerant is accumulated in the liquid receiving pan 98, the refrigerant is discharged from the liquid outlet 97, so that the refrigerant can be prevented from being excessively accumulated in the CDU 100. The liquid receiving pan 98 may be flat or may be inclined toward the liquid outlet 97. In the present embodiment, the liquid receiving pan 98 is formed of SUS, so that deformation can be suppressed even if it is large. The liquid receiving pan 98 may also be formed of other raw materials.

[0183] <3-7. Specifications of flow tubes> Next, refer to Fig.24 The specifications of the flow tube 25 will be described. Fig.24 1 is a schematic cross-sectional view of a CDU 100 according to an embodiment.

[0184] The flow pipe 25 that flows out of the heat exchanger 3 and extends to the branch flow path is inclined in the positive direction of the Z axis. Since the flow pipe 25 is inclined in the positive direction of the Z axis, it is not necessary to set an inclination on other components. In addition, the flow pipe 25 can absorb the dimensional error in the Z axis direction, making assembly easier.

[0185] <3-8. Locking mechanism of CDU and server> Next, refer to Fig.25A and Fig.25B The locking mechanism of the CDU 100 and the server SV will be described. Fig.25A It is a perspective view showing the CDU locking protrusion 65 and its peripheral members according to the embodiment. Fig.25B It is a plan view showing the CDU locking protrusion 65 and its peripheral members according to the embodiment.

[0186] The CDU 100 has CDU locking protrusions 65 on both side surfaces of the front side. When the CDU 100 moves in the insertion direction (X-axis positive direction) and contacts the server SV, the CDU locking protrusions 65 are displaced inward of the CDU 100, so that the CDU 100 is not blocked from being inserted into the server. When the CDU 100 moves in the removal direction (X-axis negative direction), the CDU locking protrusions 65 contact the server SV, so that the CDU 100 is prevented from being removed.

[0187] The release handle 64 is connected to the CDU locking protrusion 65. By pressing the release handle 64 inwardly of the CDU 100, the CDU locking protrusion 65 can be moved inwardly in conjunction. That is, when the CDU 100 is removed, the release handles 64 provided on both sides are pressed while the CDU 100 is moved in the removal direction, so that the CDU 100 can be removed.

[0188] <3-9. Configuration of CDU> Next, refer to Figure 2 The configuration of the CDU 100 according to the embodiment will be described.

[0189] The CDU 100 of the embodiment is arranged at the lower level of the server rack SR. When the door (not shown) of the server rack SR is opened, the front side of the CDU 100, i.e., the front panel 92, can be checked. Therefore, the touch screen 8 and the pump unit 4 are arranged at the front side, and the pump unit 4 and the control unit 6 (see FIG. 1 ) can be checked through the touch screen 8. Fig. 12A ) etc. In addition, the pump unit 4 and the control unit 6 are arranged on the front side so that they can be operated without removing the CDU 100, so that a failed component can be replaced while the CDU 100 is kept in operation without moving it.

[0190] The liquid supply pipes 101A and 101B connected to the CDU 100 are arranged on the back side of the server rack SR, so the CDU 100 can easily perform the connection operation of the liquid supply pipes 101A and 101B arranged in the server rack SR. By arranging the manifolds 2001 and 2002 connected to each server on the back side of the server rack SR, the liquid supply pipes 101A and 101B connected to the back side of the CDU 100 can be connected with a short flow path.

[0191] This embodiment includes a server-side secondary refrigerant that circulates through the cold plates 1002 , the manifolds 2001 , 2002 , and the CDU 100 , and a device-side primary refrigerant that circulates refrigerant from the outside to perform heat exchange with the server-side secondary refrigerant.

[0192] The front and rear sides of the CDU 100 can be exposed from the server rack SR to the outside, or can be exposed by opening and closing a door or the like.

[0193] <3-10. Layout and supplement> Next, refer to Figures 12A to 12C The layout and supplement of each component of the CDU 100 according to the embodiment will be described.

[0194] like Fig. 12A and Fig. 12B As shown, the long sides of the heat exchanger 3, tank 5 and pump unit 4 extend along the X-axis direction. By aligning the long sides of each component with the long side direction of the CDU 100, the layout freedom in the short side direction of the CDU 100, i.e., the Y-axis direction, can be increased.

[0195] In order to enlarge the heat exchanger 3 which has a great influence on the cooling performance, in this embodiment, the pump unit 4 which is long in the X-axis direction does not overlap with the heat exchanger 3 in the X-axis direction. The heat exchanger 3 and the control unit 6 which is relatively short in the X-axis direction are overlapped in the X-axis direction, thereby making it possible to lengthen the length in the X-axis direction.

[0196] The power distribution board 31 is arranged at a position that does not overlap with the flow pipe in the Z-axis direction. This arrangement can prevent damage even if liquid leaks from the flow pipe or water drops due to condensation fall. In addition, the periphery of the power distribution board 31 is covered by the cover 32, so even if liquid leaks, it can prevent the liquid from splashing onto the power distribution board 31.

[0197] like Fig. 12A and Fig. 12BAs shown, the tank 5 is arranged to overlap the heat exchanger 3. The length of the tank 5 in the Y-axis direction is longer than that of the heat exchanger 3, and a part of the tank 5 does not overlap with the heat exchanger 3. The hole 54 on the lower surface of the tank 5 connected to the flow path pipe 22 for the secondary refrigerant discharged from the heat exchanger 3 is arranged at a position that does not overlap with the heat exchanger 3 in the Z-axis direction.

[0198] like Fig. 12A As shown, the tank 5 has a reinforcing portion 55 extending in the X-axis direction at the center in the Y-axis direction of the tank 5. The reinforcing portion 55 contacts the upper and lower surfaces of the tank 5, thereby preventing the tank 5 from being crushed even when a force in the vertical direction is applied to the tank 5.

[0199] like Fig. 12A and Fig. 12C As shown, no components other than the flow tubes 23, 24 and the cover 32 are arranged between the pump unit 4 and the power distribution board 31 in the X-axis direction. Therefore, the flow tubes 23, 24 connected to the inlet and outlet of the pump unit 4 can be easily routed.

[0200] In addition, the present technology may also adopt the following structure. (1) A refrigerant circulation device, comprising: A primary flow path, wherein the primary flow path is used for the circulation of a primary refrigerant; A secondary flow path, wherein the secondary flow path is used for the circulation of a secondary refrigerant; a heat exchanger connected to the primary flow path and the secondary flow path; a frame body, the frame body having two first outer side surfaces extending along a first direction and two second outer side surfaces extending along a second direction intersecting the first direction when viewed from above, and accommodating the primary flow path, the secondary flow path, and the heat exchanger; a power connector, the power connector being disposed on the first outer side surface and protruding from the first outer side surface; two inlets, the two inlets being located on the first outer side surface where the power connector is disposed and being communicated with the primary flow path and the secondary flow path, respectively; and two outflow ports, the two outflow ports being located on the first outer side surface where the power connector is provided and being connected to the primary flow path and the secondary flow path respectively, At least one of the two inlets and at least one of the two outlets are arranged on opposite sides across the power connector in the first direction in a plan view. (2) In the refrigerant cycle device described in (1), The two inlets include a primary inlet communicating with the primary flow path and a secondary inlet communicating with the secondary flow path, The two outflow ports include a primary outflow port communicating with the primary flow path and a secondary outflow port communicating with the secondary flow path, The secondary inlet and the secondary outlet are arranged on opposite sides across the power connector in the first direction. (3) In the refrigerant cycle device described in (1) or (2), The two inlets include a primary inlet communicating with the primary flow path and a secondary inlet communicating with the secondary flow path, The two outflow ports include a primary outflow port communicating with the primary flow path and a secondary outflow port communicating with the secondary flow path, The primary inlet and the primary outlet are arranged on opposite sides across the power connector in the first direction. (4) In the refrigerant cycle device according to any one of (1) to (3), The two inlets include a primary inlet communicating with the primary flow path and a secondary inlet communicating with the secondary flow path, The two outflow ports include a primary outflow port communicating with the primary flow path and a secondary outflow port communicating with the secondary flow path, When a direction perpendicular to the first direction and the second direction is defined as a third direction, the secondary inlet and the secondary outlet are arranged on one side of the power connector in the third direction. (5) In the refrigerant cycle device according to any one of (1) to (4), The two inlets include a primary inlet communicating with the primary flow path and a secondary inlet communicating with the secondary flow path, The two outflow ports include a primary outflow port communicating with the primary flow path and a secondary outflow port communicating with the secondary flow path, The primary inlet and the primary outlet are arranged on the outer side than the secondary inlet and the secondary outlet in the first direction. (6) In the refrigerant cycle device described in (4), The primary inlet and the primary outlet are arranged on the other side of the third direction than the secondary inlet and the secondary outlet. (7) In the refrigerant cycle device described in any one of (1) to (6), The two inlets include a primary inlet communicating with the primary flow path and a secondary inlet communicating with the secondary flow path, The two outflow ports include a primary outflow port communicating with the primary flow path and a secondary outflow port communicating with the secondary flow path, The refrigerant cycle device further comprises: a first liquid supply pipe, the first liquid supply pipe being in communication with the secondary inlet and protruding from the first outer side surface where the power connector is provided; and a second liquid delivery pipe, the second liquid delivery pipe being connected to the secondary outflow port and protruding from the first outer side surface where the power connector is provided, The secondary inlet is arranged at a position closer to one side of the power connector in the first direction. The secondary outlet is arranged at a position closer to the other side of the first direction than the power connector. The first liquid delivery pipe extends toward one side of the first direction, The second liquid delivery pipe extends toward the other side of the first direction. (8) A cooling device comprising: (7) The refrigerant circulation device described; a plurality of cold plates in contact with a plurality of heat sources; and a collection manifold and a distribution manifold in communication with the plurality of cold plates, The collecting manifold is arranged at a position closer to one side of the power connector in the first direction. The distribution manifold is arranged at a position closer to the other side of the first direction than the power connector. (9) Based on the cooling device described in (8), The protrusion amount of the power supply connector is larger than the protrusion amount of the primary inlet, the secondary inlet, the primary outlet, or the secondary outlet from the first outer side surface. (10) In the cooling device described in (8) or (9), The width of the front end portion of the power connector is narrower than the width of the base end portion of the power connector. (11) A pump unit, The pump unit is connected to the frame in a pluggable manner, and comprises: a movable portion that is located outside the housing and is displaceable between a first position and a second position when the pump unit is inserted into the housing; and A restriction portion that restricts movement of the movable portion toward the first position when the movable portion is located at the second position. (12) Based on the pump unit described in (11), The restriction portion includes an operating portion that is displaceable between a third position and a fourth position, and when the operating portion moves from the third position to the fourth position, the state in which the movement of the movable portion to the first position is restricted is released. (13) Based on the pump unit described in (12), The restricting portion restricts movement of the movable portion to the first position by moving the operating portion from the fourth position to the third position in association with movement of the movable portion from the first position to the second position. (14) In the pump unit described in (12) or (13), The restriction portion includes an elastic member that urges the operation portion in a direction from the fourth position toward the third position. (15) In the pump unit described in any one of (11) to (14), The frame body includes a convex portion protruding in a direction intersecting with a direction of insertion and removal of the pump unit. The movable portion includes a relative portion, which is located further back in the pump unit insertion direction than the protrusion when the pump unit is inserted into the frame and the movable portion is located at the second position, and is opposite to the protrusion in the insertion and removal direction. (16) Based on the pump unit described in (15), The movable portion is displaceable between the first position and the second position by rotating about a rotation axis extending in a direction intersecting the insertion and removal direction. When the movable portion moves from the second position to the first position in a state where the pump unit is inserted into the frame, the opposing portion changes from a state where it opposes the convex portion in the insertion and removal direction to a state where it does not oppose the convex portion in the insertion and removal direction.

[0201] It should be understood that the embodiments disclosed herein are illustrative in all respects and do not constitute limitations. In fact, the above embodiments may be embodied in a variety of ways. In addition, the above embodiments may be omitted, replaced, or modified in various ways without departing from the appended claims and their gist. Explanation of symbols

[0202] 1 primary flow path 2 Secondary flow path 3Heat exchanger 4 pump units 5 cans 6Control Unit 7 Power connector 8 Touch screen 9 Frame 11, 12, 13, 21, 22, 23, 24, 25 flow tubes 46 Restriction Department 90 Storage Area 91 back panel 91A primary inlet 91B primary outlet 92 front panel 92A secondary flow inlet 92B secondary flow outlet 100CDU 101A First liquid delivery pipe 101B Second liquid delivery pipe 104 Pressure Sensor 411 Handle Work Department 412 handle side 461 Operation Department 462 Elastic components 1000 Cooling Device 1001 Cooling unit 1002 cold plate 2001 Collection Manifold 2002 Distribution manifold.

Claims

1. A refrigerant cycle device, characterized in that: have: A primary flow path, wherein the primary flow path is used for the circulation of a primary refrigerant; A secondary flow path, wherein the secondary flow path is used for the circulation of a secondary refrigerant; a heat exchanger connected to the primary flow path and the secondary flow path; a frame body, the frame body having two first outer side surfaces extending along a first direction and two second outer side surfaces extending along a second direction intersecting the first direction when viewed from above, and accommodating the primary flow path, the secondary flow path, and the heat exchanger; a power connector, the power connector being disposed on the first outer side surface and protruding from the first outer side surface; two inlets, the two inlets being located on the first outer side surface where the power connector is disposed and being communicated with the primary flow path and the secondary flow path, respectively; and two outflow ports, the two outflow ports being located on the first outer side surface where the power connector is provided and being connected to the primary flow path and the secondary flow path respectively, At least one of the two inlets and at least one of the two outlets are arranged on opposite sides across the power connector in the first direction in a plan view.

2. The refrigerant cycle device according to claim 1, characterized in that: The two inlets include a primary inlet communicating with the primary flow path and a secondary inlet communicating with the secondary flow path, The two outflow ports include a primary outflow port communicating with the primary flow path and a secondary outflow port communicating with the secondary flow path, The secondary inlet and the secondary outlet are arranged on opposite sides across the power connector in the first direction.

3. The refrigerant cycle device according to claim 1 or 2, characterized in that: The two inlets include a primary inlet communicating with the primary flow path and a secondary inlet communicating with the secondary flow path, The two outflow ports include a primary outflow port communicating with the primary flow path and a secondary outflow port communicating with the secondary flow path, The primary inlet and the primary outlet are arranged on opposite sides across the power connector in the first direction.

4. The refrigerant cycle device according to claim 1, characterized in that: The two inlets include a primary inlet communicating with the primary flow path and a secondary inlet communicating with the secondary flow path, The two outflow ports include a primary outflow port communicating with the primary flow path and a secondary outflow port communicating with the secondary flow path, When a direction perpendicular to the first direction and the second direction is defined as a third direction, the secondary inlet and the secondary outlet are arranged on one side of the power connector in the third direction.

5. The refrigerant cycle device according to claim 1, characterized in that: The two inlets include a primary inlet communicating with the primary flow path and a secondary inlet communicating with the secondary flow path, The two outflow ports include a primary outflow port communicating with the primary flow path and a secondary outflow port communicating with the secondary flow path, The primary inlet and the primary outlet are arranged on the outer side than the secondary inlet and the secondary outlet in the first direction.

6. The refrigerant cycle device according to claim 4, characterized in that: The primary inlet and the primary outlet are arranged on the other side of the third direction than the secondary inlet and the secondary outlet.

7. The refrigerant cycle device according to claim 1, characterized in that: The two inlets include a primary inlet communicating with the primary flow path and a secondary inlet communicating with the secondary flow path, The two outflow ports include a primary outflow port communicating with the primary flow path and a secondary outflow port communicating with the secondary flow path, The refrigerant cycle device further comprises: a first liquid delivery pipe, the first liquid delivery pipe being in communication with the secondary inlet and protruding from the first outer side surface where the power connector is provided; as well as a second liquid delivery pipe, the second liquid delivery pipe being connected to the secondary outflow port and protruding from the first outer side surface where the power connector is provided, The secondary inlet is arranged at a position closer to one side of the power connector in the first direction. The secondary outlet is arranged at a position closer to the other side of the first direction than the power connector. The first liquid delivery pipe extends toward one side of the first direction, The second liquid delivery pipe extends toward the other side of the first direction.

8. A cooling device, characterized in that: have: The refrigerant cycle device according to claim 7; a plurality of cold plates in contact with the plurality of heat sources; and a collection manifold and a distribution manifold in communication with the plurality of cold plates, The collecting manifold is arranged at a position closer to one side of the power connector in the first direction. The distribution manifold is arranged at a position closer to the other side of the first direction than the power connector.

9. The cooling device according to claim 8, characterized in that: The protrusion amount of the power supply connector is larger than the protrusion amount of the primary inlet, the secondary inlet, the primary outlet, or the secondary outlet from the first outer side surface.

10. The cooling device according to claim 8, characterized in that The width of the front end portion of the power connector is narrower than the width of the base end portion of the power connector.

11. A pump unit, The pump unit is connected to the frame in a pluggable manner, and is characterized in that: have: a movable portion that is located outside the housing and is displaceable between a first position and a second position when the pump unit is inserted into the housing; and A restriction portion that restricts movement of the movable portion toward the first position when the movable portion is located at the second position.

12. The pump unit according to claim 11, characterized in that The restriction portion includes an operating portion that is displaceable between a third position and a fourth position, and when the operating portion moves from the third position to the fourth position, the state in which the movement of the movable portion to the first position is restricted is released.

13. The pump unit according to claim 12, characterized in that The restricting portion restricts movement of the movable portion to the first position by moving the operating portion from the fourth position to the third position in association with movement of the movable portion from the first position to the second position.

14. The pump unit according to claim 12, characterized in that The restriction portion includes an elastic member that urges the operation portion in a direction from the fourth position toward the third position.

15. The pump unit according to claim 11, characterized in that The frame body includes a convex portion protruding in a direction intersecting with a direction of insertion and removal of the pump unit. The movable portion includes a relative portion, which is located further back in the pump unit insertion direction than the protrusion when the pump unit is inserted into the frame and the movable portion is located at the second position, and is opposite to the protrusion in the insertion and removal direction.

16. The pump unit according to claim 15, characterized in that The movable portion is displaceable between the first position and the second position by rotating about a rotation axis extending in a direction intersecting the insertion and removal direction. When the movable portion moves from the second position to the first position in a state where the pump unit is inserted into the frame, the opposing portion changes from a state where it opposes the convex portion in the insertion and removal direction to a state where it does not oppose the convex portion in the insertion and removal direction.

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