JP6926793B2 - Information processing device - Google Patents

Description

The present application relates to an information processing device having a distributor for distributing a coolant.

In an information processing device such as a server device, a coolant is supplied into the information processing device by a coolant supply device using a metal pipe, a resin hose, or the like in order to cool the built-in electronic device or the like. The server device is equipped with a plurality of electronic devices having a Central Processing Unit (hereinafter, CPU), and a coolant is distributed to cool each of the electronic devices. The coolant is distributed by a distributor (also referred to as a multi-purpose pipe or a manifold) in which distribution paths such as a plurality of hoses are connected to one thick pipe (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2001-343174

However, as the number of electronic devices mounted on the server device increases, the pipe length of the distributor becomes longer in order to evenly distribute the coolant to the electronic devices, so that there is a problem that the mounting space of the distributor increases. be.

On one side, it is intended to provide an information processing apparatus in which the entire distributor that distributes the coolant is miniaturized.

According to one form, it is an information processing device that cools a plurality of electronic devices stacked in the height direction with a coolant, and includes a distributor for distributing the coolant, and the distributor is a first distribution layer. A first distribution layer distributor is provided with a distributor and a second distribution layer distributor which is connected to the first distribution layer distributor to further distribute the coolant, and the first distribution layer distributor temporarily stores the coolant. The first distribution pipe has a plurality of first distribution connecting pipes branched from the first distribution pipe, and the axis of the first distribution pipe is an information processing device. The first distribution connecting pipes are arranged side by side in the height direction of the information processing apparatus, and the second distribution layer distributor is arranged so as to be parallel to the height direction of the information processing apparatus. Each of the plurality of second distribution pipes is provided by connecting to the distribution communication pipe and temporarily storing the coolant, and the axis of the second distribution pipe processes information in each of the plurality of second distribution pipes. An information processing device is provided in which the second distribution pipes are arranged so as to be parallel to the height direction of the device and the plurality of second distribution pipes are arranged side by side in the height direction of the information processing device.

It is possible to provide an information processing device in which the entire distributor is miniaturized.

It is a schematic diagram which shows the outline of the information processing apparatus provided with a distributor and a confluence which is a comparative technique. It is a schematic diagram which shows the outline of the information processing apparatus provided with a distributor and a confluence to be disclosed. It is a perspective view which shows a part of a distributor and a merging device. It is a top view which shows the electronic device which cools by a coolant. It is a conceptual diagram which shows that the coolant is distributed by a plurality of distribution layer distributors, and is rejoined by a plurality of merging layer merging devices. It is a figure which shows another example of an information processing apparatus, and is the perspective view which shows a part of a distributor and a merging device.

Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings, based on specific examples. Further, in the following embodiments, the same or similar elements are indicated by a common reference reference numeral, and the scales of these drawings are appropriately changed in order to facilitate understanding.

First, a server device, which is an example of an information processing device of the comparative technology, will be described. FIG. 1 is a schematic view showing an outline of the server device 2 of the comparative technique. The server device 2 contains a plurality of electronic devices 40 each having a CPU, a heat exchanger 33, a distributor 210 for distributing the coolant, and a confluence 220 for collecting the coolant that cooled the electronic device 40. Prepare in the body 32.

The distributor 210 is connected to the heat exchanger 33 by the water supply pipe 34, and the coolant flows from the heat exchanger 33 through the water supply pipe 34 into the distributor 210. The heat exchanger 33 is also a coolant supply device, and has a function of a pump that sends the coolant to the distributor 210.

The distributor 210 is a device that distributes the coolant sent from the heat exchanger 33 to the electronic device 40, and is a communication path between the distribution pipe 211 into which the coolant flows and the distribution pipe 211 and the electronic device 40. It is provided with a certain distribution connecting pipe 212. In addition, in FIG. 1, the distribution connecting pipe 212 is shown by a solid line, and the flow method of the coolant is shown by an arrow. The distribution pipe 211 includes one inflow port connected to the water supply pipe 34, and the same number of outlets as the number of electronic devices 40. The distribution connecting pipe 212 is, for example, a resin hose. The distribution connecting pipe 212 is connected to the discharge port provided in the distribution pipe 211 and the inflow port provided in each of the electronic devices 40. The cooling water that has flowed from the heat exchanger 33 into the distributor 210 via the water supply pipe 34 is accumulated in the distribution pipe 211 and distributed to each of the electronic devices 40 through the distribution connecting pipe 212.

The merging device 220 includes a merging pipe 221 and a merging connecting pipe 222 which is a connecting route between the electronic device 40 and the merging pipe 221. In FIG. 1, the merging connecting pipe 222 is indicated by a dotted line, and the flow direction of the coolant is indicated by an arrow. The cooling water flowing out of the electronic device 40 is collected in the merging pipe 221 via the merging connecting pipe 222. The cooling water collected in the merging pipe 221 flows into the heat exchanger 33 from the merging pipe 221 via the drain pipe 35. The cooling water heated by the electronic device 40 is cooled again by the heat exchanger 33 and sent to the distributor 210 again by the heat exchanger 33. In this way, the cooling water circulates in the server device 2 to cool the electronic device 40.

A structure that distributes the coolant to the electronic device 40 by using the distribution pipe 211 that branches into the plurality of distribution connecting pipes 212 is effective as a method of supplying the coolant having an isothermal and uniform flow rate to the plurality of electronic devices 40. .. However, as the performance of the server device 2 is improved, more electronic devices 40 having a CPU are mounted, and there is a problem that the size of the server device 2 is increased due to the following factors.
(1) Since one distribution pipe 211 is branched so as to be connected to a plurality of electronic devices 40, the length of the distribution pipe 211 increases as the number of electronic devices 40 increases. On the other hand, in order to eliminate the pressure loss due to the difference in the distance from the inflow port of the distribution pipe 211 to the electronic device 40 (hereinafter referred to as the distribution path), it is necessary to make the distribution paths the same length. Therefore, all distribution communication pipes 212 must match the length of the longest distribution communication pipe 212, which requires a larger mounting space.
(2) Since the pressure loss due to the increase in the distance from the inlet of the distribution pipe 211 to the individual outlets of the distribution pipe 211 causes a decrease in the flow rate, the distribution pipe is used to reduce the difference in pressure loss. It is necessary to further increase the diameter of 211.

In the structure of the distributor 210 and the merging device 220 of the comparative technique, for the above reason, as the number of electronic devices 40 to be cooled increases, the mounting space for them increases. On the other hand, the installation area of the server device is often limited, and it is difficult to increase the occupied area due to the distributor 210 and the confluence 220. Therefore, there is a demand for a small distributor and merging device with a smaller mounting space.

FIG. 2 is a schematic diagram showing an outline of a server device 1 which is an example of the information processing device of the present embodiment. FIG. 3 is a perspective view showing a part of the distributor and the merging device. The Z-axis shown in FIGS. 2 and 3 indicates the height direction of the server device 1. Similar to the server device 2 shown in FIG. 1, the server device 1 includes a plurality of electronic devices 40 having a CPU and a heat exchanger 33. The server device 1 includes a distributor 10 that distributes the cooling liquid sent from the heat exchanger 33 via the water supply pipe 34 to each of the electronic devices 40, and a merging device 20 that collects the cooling liquid that cools the electronic device 40. To be equipped with.

Distributor 10 of the present embodiment, as shown in FIGS. 2 and 3, have a two-stage hierarchical structure, two distribution layer distributor 13 ₁ and the distribution layer distributor 13 ₂ (hereinafter, a plurality of distribution The layer distributors may be collectively referred to simply as the distribution layer distributor 13).

Specifically, the distributor 10, first distributes the first distribution layer distributor 13 ₁ for distributing the cooling liquid, the first distribution layer distributor 13 further coolant connected to ₁ from the water supply pipe 34 and a second distribution layer distributor 13 _2. The first distribution layer distributor 13 ₁ is provided with a dispensing pipe 11 ₁ for storing cooling liquid temporarily, a plurality of the dispensing connecting pipe 12 ₁ which is branched from the distribution pipe 11 _1. Incidentally, dispensing communication tube 12 ₁ is shown by solid arrows in FIG. 2 indicates the flow direction of the cooling liquid by the _arrows. The second distribution layer distributor 13 _2, and the distribution pipe 11 ₂ connected to the first distribution layer distributor 13 the _first dispensing communication tube 12 _1, a plurality of which is branched from the distribution pipe 11 ₂ and a dispensing connecting pipe 12 _2. Each of the plurality of distribution communication tubes 12 ₂ of the second distribution layer distributor 132 ₂ is connected to the corresponding electronic device 40. In the following, a plurality of distribution pipes 11 _1, 11 ₂ simply, and the distribution pipe 11, together multiple dispensing communication tube 12 _1, 12 _2, may be referred to as a dispensing connecting pipe 12.

Heat exchanger 33, water supply pipe 34 is connected to the first distribution layer distributor 13 distributing pipes 11 ₁ in ₁ via, from the distribution pipe 11 ₁ into four dispensing connecting pipe 12 ₁ It is branched. In each of the distribution pipe 11 ₁ has a plurality of discharge ports are provided for one inlet. The first distribution layer distributor 13 distributing communication tube 12 ₁ of ₁ on the upstream side is connected to the distribution pipe 11 of the _second distribution layer distributor 13 ₂ on the downstream side, respectively. Distributing communication tube 12 _1, one outlet is provided for one inlet. From the second distribution layer distributor 13 ₂ distribution pipe 11 _2, be branched into a plurality of dispensing communication tube 12 _2, each individual dispensing connecting pipe 12 ₂ is inlet 47 (FIG electronic devices 40 4).

As shown in FIG. 3, the first distribution layer distributor 13 diameter TD ₁ of distributing communication tube 12 _{1 1} is smaller than the diameter SD ₁ of the distribution pipe 11 ₁ of the first distribution layer distributor 13 ₁ It is formed. Further, the first distribution layer distributor 13 ₁ on the upstream side than the diameter of the distribution pipe 11 ₁ of diameter SD _1, the second downstream side distribution layer distributor 13 ₂ of the distribution pipe 11 ₂ It is formed so that the diameter of the diameter SD _{2 is smaller.} Here, the diameter means the inner diameter.

When a single branch pipe is used as in the server device 2 of the comparative technique, the cooling liquid is branched so as to be distributed to all the electronic devices. On the other hand, if the distributor 10 has a hierarchical structure as in the server device 1 of the present embodiment, the number of branches in each of the distribution pipes 11 can be reduced. Since the number of branches is reduced, it is not necessary to lengthen all the distribution connecting pipes 12 in order to eliminate the pressure loss. Therefore, the space occupancy rate of the distribution connecting pipe 12 can be reduced. Further, since the flow rate per distribution pipe 11 is reduced, the diameter SD of the distribution pipe 11 can be made smaller. Therefore, the distributor 10 can be made smaller as a whole, which leads to a reduction in component cost.

The merging device 20 of the server device 1 of the present embodiment will be described. Like the distributor 10, the merging device 20 has a hierarchical structure as shown in FIGS. 2 and 3. Combiners 20 shown in FIG. 2, has a two-tier confluent layer merger 23 _1, 23 _2. In confluent layer combiners 23 _1, merging pipe 21 _1, 21 ₂ and the merging for connecting duct 22 _1, 22 ₂ (in FIG. 2, indicated by dotted arrows, the flow direction of the cooling liquid is indicated by arrows) with .. The converging device 20 shown in FIG. 2, the coolant discharged from the electronic device 40 is stored in the confluence pipe 21 ₁ through the confluence connection pipe 22 _1. Once accumulated coolant, the confluence pipe 21 ₂ is the second merging layers converging device 23 ₂ on the downstream side, it flows through the confluence connecting pipe 22 _2. It collected coolant to the confluence pipe 21 _2, via a drainage pipe 35, and flows into the heat exchanger 33.

As shown in FIG. 3, than the first converging layer merger 23 diameter CD ₁ of the confluent pipe 21 ₁ of _1, towards the second confluence layer merger 23 ₂ merging pipe 21 _{and second} diameter CD ₂ Is formed to be large. The first merging layers converging device 23 diameter UD ₁ of the confluence connection pipe 22 ₁ of _1, is smaller than the diameter CD ₁ of the confluent pipe 21 ₁ of the first hierarchy. By separating each layer, is on the upstream side becomes smaller amount of coolant flowing into the confluence pipe 21 _1, a first converging layer merger 23 ₁ diameter CD ₁ of the confluent pipe 21 _1, the It can be smaller than 2 of merged layer merger 23 diameter CD ₂ of the confluent pipe 21 _{2 2.}

The electronic device 40 mounted on the server device 2 of the present embodiment will be described. As shown in FIG. 4, the electronic device 40 has a plurality of integrated circuits 42 such as a CPU mounted on the printed circuit board 41. Further, an electric connector 43 for connecting to another electronic device or the like is provided at the end of the printed circuit board 41. A cold plate 44 for cooling the integrated circuit 42 is attached to the integrated circuit 42, which is a heat generating component. A pipe 45 through which the coolant flows is arranged so as to efficiently cool the cold plate 44 on the integrated circuit 42. Further, the electronic device 40, a coupler 46 for connecting to the confluence connection pipe 22 ₁ of the dispensing connecting pipe 12 ₂ and the converging device 20 of the distributor 10 is provided. The coupler 46 has an inflow port 47 and an outlet 48, and the ends of pipes 45 for flowing the coolant are connected to each of the coupler 46. An inlet 47 provided in the distributing communication tube 12 ₂ in the coupler 46, by fitting the outlet 48 into the confluence connecting duct 22 _1, easily attach the electronic device 40 to the distributor 10 and the merging unit 20 It is possible. The coolant flows through the pipe 45 according to the arrow shown in FIG.

The sizes of the distributor 210 and the merger 220 of the server device 2 according to the comparison technique shown in FIG. 1 and the distributor 10 and the merger 20 of the server device 1 shown in FIG. 2 are compared according to an embodiment. In the embodiment, the size of the distributor and the confluence required to cool the 96 electronic devices 40 are shown. The distributor 10 of the server device 1 has two layers as shown in FIG. Then, 8 diverts the cooling liquid by connecting a dispensing connecting pipe 12 ₁ of the distributor pipe 11 ₁ into eight first distribution layer distributor 13. Then, each dispensing communication tube 12 ₁ is connected to the second distribution layer distributor 13 ₂ distribution pipe 11 _2, respectively. That is, the second providing the distribution layer divider 13 _2, eight of the distribution pipe 11 _2. Each of the second distribution layer distributor 13 ₂ distribution pipe 11 ₂ is 12 branched to connect the electronic device 40 shown in FIG. For one distribution pipe 11 _2, an electronic device 40 arranged in twelve parallel as shown in FIG. 2, each of the inlet 47 by one row, directly electronics 40 without using a separate hose Connect.

ただし、ＳＤ₂は第２の分配層分配器１３₂の分配用配管１１₂の径、ＳＤ₁は第１の分配層分配器１３₁の分配用配管１１₁の径、ＳＮ₁は第１の分配層分配器１３₁の分配用配管１１₁から第２の分配層分配器１３₂の分配用配管１１₂への分岐数である。 The first distribution layer distributor 13 diameter SD ₁ of the distribution pipe 11 ₁ of ₁ and 45 mm, longitudinal length SL ₁ and 400 mm. Then, when setting the second distribution layer distributor 13 _second diameter SD ₂ distribution pipe 11 _2, using the following equation.

However, SD ₂ and the second distribution layer distributor 13 ₂ distribution pipe 11 ₂ diameter, SD ₁ is the first distributor layer distributor 13 the _first distribution pipe 11 ₁ of the diameter, SN ₁ is first a number of branches from the distribution pipe 11 ₁ of the distribution layer distributor 13 ₁ to the second distribution layer distributor 13 ₂ distribution pipe 11 _2.

In the embodiment, the first distribution layer distributor 13 ₁ from the distribution pipe 11 ₁ for branching the second distribution layer distributor 13 ₂ to 8, the second distribution layer distributor 13 ₂ distribution pipe 11 ₂ flow rate through the is a 1/8 of the flow rate through the dispensing pipe 11 ₁ of the first distribution layer distributor 13 _1. The pressure loss in the distributor pipe 11 _2, in order to suppress the same extent and the distribution pipe 11 _1, similar to the flow rate, the cross-sectional area of the distribution pipe 11 of the _second distribution layer divider 13 _2, first the cross-sectional area of the distribution pipes of the distribution layer distributor 13 ₁ to about 1/8. That is, the cross-sectional area ratio is 1/8, and the inner diameter ratio is √ (1/8). Taking into account the above, in consideration of the distribution and cost, size SD ₂ distribution pipe 11 ₂ of the second layer can be 20 mm, the pipe length SL ₂ and 400 mm. The diameter of the distributing communication pipe 12 ₁ (hose) to be connected to the distribution pipe 11 ₁ of the first distribution layer distributor distribution pipe 11 of the _second distribution layer distributor 15 mm, length 1500mm And. Further, since the merging device 20 collects the cooling water that has flowed into each electronic device 40 by the distributor 10, it is formed to have the same dimensions. That is, the first confluent layer merger 23 ₁ of 20mm diameter CD ₁ of the confluent pipe 21 _1, a pipe length CL ₁ and 400 mm, the second converging layer merger 23 ₂ merging pipe 21 ₂ of diameter CD ₂ is 45 mm, and the pipe length CL ₂ is 400 mm. The diameter of the confluence connecting pipe 22 ₂ is 15 mm, and 1500mm length.

Table 1 shows the volumes when the distributor 10 and the merger 20 are manufactured with the above dimensions.

If the distributor 210 of the comparative art shown in FIG. 1 for distributing the coolant 96 of the electronic device 40, the cross-sectional area of the distributor 210, the first distribution layer distributor 13 the _first distribution pipe 11 ₁ of the cross-sectional It should be at least four times the area. Therefore, the diameter of the distribution pipe 211 is 90 mm, and the length is 1600 mm. Further, the diameter of the distribution connecting pipe 212 (hose) connecting the distributor 210 to the electronic device 40 is 10 mm, and the length is 500 mm. Further, the confluence 220 that collects the cooling water that cools the electronic device 40 is also provided with the same dimensions as the distributor 210. That is, the diameter of the merging pipe 221 is 90 mm, the pipe length is 1600 mm, the diameter of the merging connecting pipe 222 is 10 mm, and the pipe length is 500 mm.

Table 2 shows the volumes when the distributor and the merging device are manufactured with the above dimensions.

Comparing the total volumes required for the distributor 10 and the confluence 20 of the server device 1 of the present embodiment shown in Table 1 with the distributor 210 and the confluence 220 of the server device 2 of the comparative technique, it is about 1. It can be seen that it can be suppressed to about / 3. Therefore, if the server device 1 of the present embodiment is used, the coolant can be distributed to many electronic devices 40 and the coolant can be collected, and the pressure loss can be suppressed to the same level as that of the server device 2 of the comparative technique. .. That is, the server device 1 of the present embodiment can reduce the volume required for piping while maintaining the cooling performance.

Further, in the server device 2 of the comparative technique, the distribution pipe 211 and the merging pipe 221 are arranged in parallel. In the server device 1 of the present embodiment, a distribution pipe 11 _1, the length of the converging pipe 21 _2, it is possible to half the converging pipe 221 and the distribution pipe 211 of the server device 2 of the comparative technique .. Therefore, placing a distributor pipe 11 ₁ and merging pipe 21 ₂ up and down, i.e., the long axis SS of the distribution pipe 11 _1, as shown in FIGS. 2 and 3, converging pipe 21 _second long axis CS Can be arranged so that and are coaxial. Therefore, the installation space of the distributor 10 and the merger 20 can be made smaller than the distributor 210 and the merger 220 of the server device 2 of the comparative technique.

The distributor 10 and the merging device 20 shown in FIGS. 2 and 3 are formed of a two-layer distribution layer distributor and a merging layer merging device. However, the distributor 10 and the merging device 20 are not limited to two layers, and may be formed in three or more layers depending on the number of connected electronic devices 40.

Distribution layer When the layer of the distributor is generalized and referred to as N layer, in the distribution layer distributor 13 _N , the distribution pipe 11 _N for temporarily storing the coolant and the distribution pipe 11 _{N + 1 on the downstream side} Alternatively, it has a plurality of distribution connecting pipes 12 _N connected to the electronic device 40. It is assumed that N is an integer of 1 or more in the layer number and increases from the upstream side to the downstream side through which the coolant flows.

Further, the merging device 20 is not limited to two layers, and may be formed in three or more layers depending on the number of connected electronic devices 40. _{The merging pipe 21 M} that temporarily stores the coolant (M is a layer number and increases from the upstream to the downstream where the coolant flows) and the merging pipe 21 of the electronic device 40 or the merging layer merging device on the upstream side. It has a plurality of merging connecting pipes 22 _{M connected to M-1} . Each of the merging pipes 21 _M is provided with a plurality of inflow ports and one drainage port.

FIG. 5 is a diagram showing an outline of an information processing device including a distribution layer distributor 13 having three or more layers and a merging layer merging device 23. Flowing layer having flowed into the first distribution layer distributor 13 ₁ by the water supply pipe 34 from the left, is distributed to the distribution pipe 11 ₁ through the dispensing communication pipe 121, flows into the second distribution layer distributor 13 ₂ .. The distribution of the coolant continues up to the final layer 13e and flows to each of the electronic devices 40. The cooling water that cools the electronic device 40 is collected by the merging device 20. The merging unit 20, the cooling water is collected in each group in the first merging layers converging device 23 _1. After continuing to the final layer 23e, it is sent to the heat exchanger 33 via the drain pipe 35.

The number of layers of the distributor 10 and the number of layers of the merger 20 may be the same or different. For example, the distributor 10 may be formed in three layers and the merger 20 may be formed in two layers. Only the merging device 20 may be one layer.

When the distributor 10 is manufactured in a plurality of layers, the distribution pipe 11 of the N + 1 distribution layer distributor located downstream from the diameter SD _{N of the distribution pipe 11 N in the Nth distribution layer distributor.} diameter SD N _{+ 1} of the _{N + 1} is smaller. Further, in the N + 1 of the distribution layer distributor, who diameter TD _N of distributing communication tube 12 _N is smaller than the diameter SD _N of the distribution pipe 11 _N.

但し、ＳＤ_Nは第Ｎの分配層分配器における分配用配管１１の径、ＳＮ_Nは第Ｎの分配層分配器での分配数である。 Further, in consideration of the pressure loss when distributing the coolant, the diameter SD _{N + 1} of the distribution pipe 11 _{N + 1 of the distribution layer distributor 13 N + 1 on the downstream side is expressed by the following equation.} It is better to ask for.

However, SD _N is the diameter of the distribution pipe 11 in the distribution layer distributor of the N, the SN _N is the distribution number in distribution layer distributor of the N.

_{When the merging device 20 is formed in a plurality of layers, the merging pipe 21 M in} the Mth merging layer merging device (M is an integer of 2 or more and increases from the upstream side to the downstream side of the coolant). The diameter CD _M -1 of the merging pipe 21 _{M-1 of the M-1 layer} is formed smaller than the diameter CD M of. In other words, than the diameter CD _M of the confluent pipe 21 _M in confluent layer merger of the M, the diameter CD M _{+ 1} of the confluent pipe 21 M _{+ 1} of M + 1 hierarchy (downstream) is larger. Further, in the Mth merging layer merging device, the diameter UD _M of the merging connecting pipe 22 _M is formed smaller than the diameter CD _{M of the merging pipe 21 M.}

但し、ＣＤ_Mは第Ｍの合流層合流器（上流側の層）における配管の径、ＣＮ_M+1は第Ｍ＋１の合流層合流器（下流側の層）で冷却液が合流する合流数である。 Further, it is preferable to obtain the diameter CD _{M + 1 of the merging pipe 21 M + 1} of the M + 1 layer by the following formula.

However, CD _M is the diameter of the pipe in the Mth merging layer merging device (upstream layer), and CN _{M + 1} is the number of merging liquids merging in the M + 1 merging layer merging device (downstream side layer). be.

FIG. 6 shows a server device 1a which is another example of the information processing device of the present embodiment. In the server device 1 shown in FIGS. 2 and 3, the diameter SD _{2 of the second} distribution pipe 112 used in the distributor 10 is smaller than the diameter SD _{1 of the} first distribution pipe 11 _1. It was formed. On the other hand, the distributor 110 of the server apparatus 1a shown in FIG. 6, the first and the diameter SD ₁ of the distribution pipe 11 ₁ of the first distribution layer distributor 13 _1, the second distribution layer distributor 13 ₂ No. diameter SD ₂ distribution pipe 11 ₂ 2 are formed in substantially the same size. Since the first distribution communication pipe 12 ₁ , the second distribution communication pipe 12 ₂ and the electronic device 40 are the same as those of the server device 1 shown in FIG. 3, their description will be omitted. The diameter SD ₁ of the first distribution pipe 11 ₁ shown in FIG. 6, the second distribution pipe 11 ₂ of diameter size of the SD ₂ (inner diameter) is desirably a 1Mm～200mm.

As for the power multiplexer 120 of the server apparatus 1a shown in FIG. 6, similar to the distributor 110, first to the diameter CD ₁ of the confluent pipe 21 ₁ of the first converging layer merger 23 _1, second confluence are formed of the same magnitude as the diameter CD ₂ layers converging device 23 of the _second merging pipe 21 _2. Since the merging connecting pipe 22 ₁ and the merging connecting pipe 22 ₂ are the same as those of the server device 1 shown in FIG. 3, their description will be omitted. The first and the diameter CD ₁ of the confluent pipe 21 _1, a second size of the diameter CD ₂ of the confluent pipe 21 ₂ (inner diameter) is desirably a 1Mm～200mm. The first and the diameter CD ₁ of the confluent pipe 21 _1, may be a diameter SD ₂ of the second distribution pipe 11 ₂ as the same size. Here, the same size includes a size that can be regarded as substantially the same as well as being completely the same. For example, a difference in size of, for example, 1 mm to 5 mm, which does not significantly affect the pressure loss of the coolant flowing through the pipe, is included in the same manner.

The first distribution pipe 11 ₁ and the second distribution pipe 11 ₂ use pipes having the same diameter, but the height SL _{1 of} the first distribution pipe 111 and the second distribution pipe 11 ₂ The height of SL ₂ may be the same or different from that of SL 2. That is, the height SL ₁ of the first distribution pipe 11 _1, the height SL ₂ of the second distribution pipe 11 _2, it may be either one large.

The first confluence pipe 21 ₁ and the second confluence pipe 21 ₂ is to use a tube of the same diameter, the first height CL ₁ of the merging pipe 21 _1, a second confluence the height CL ₂ of the pipe 21 ₂ can be the same size or may be different. That is, the height CL ₂ of the second confluence pipe 21 _2, the height CL ₂ of the first confluence pipe 21 _1, may be either one large. The pressure loss of the coolant flowing through the distributor 110 or the confluence 120 _{varies depending on the diameter of the pipes (CD 1} , CD ₂ , SD ₁ , SD ₂ ), but the difference in their lengths, that is, the height of the pipes. This is because the influence of the difference (SL ₁ , SL ₂ , CL ₁ , CL _{2) is small.}

In the server apparatus 1a shown in FIG. 6, the diameter SD ₁ of the first distribution pipe 11 _1, since the diameter SD ₂ of the second distribution pipe 11 ₂ is the same size, the pressure loss hardly changes .. Therefore, if the first distribution pipe 11 ₁ and a plurality of communicating a plurality of second and distributing pipe 11 ₂ first length of distributing communication tube 12 ₁ and the diameter TD ₁ to the same, respectively, it is possible to supply the cooling liquid at a constant flow rate to a second respective distributor pipe 11 _2. Further, even when the first length of the distributing communication tube 12 ₁ is changed to adjust the pressure loss is provided a function of adjusting the change or the pressure loss diameter TD ₁ of the first dispensing communication tube 12 ₁ By doing so, it is possible to control the amount of the coolant supplied to the _{second distribution pipe 112.} Therefore, for example, even when the number of branches from the _{first distribution pipe 111 increases, the design becomes easy.}

Further, by the first to the diameter SD ₁ of the distribution pipe 11 ₁ and diameter SD ₂ of the second distribution pipe 11 ₂ and the same size, the first distribution pipe 11 ₁ and the second distribution the use pipe 11 ₂ can be procured in the same specification. Since the procurement is performed with the same specifications, _{the purchase amount of the pipe material used in the first} distribution pipe 111 or the like is increased, so that the unit price can be reduced and the procurement cost can be reduced. The same effect can be said that there is also the first converging pipe 21 ₁ and a second converging pipe 21 ₂ for converging device 120 of the server apparatus 1a.

The present application has been described in detail above with reference to particularly preferred embodiments thereof. For the sake of easy understanding of this application, the specific forms of this application are added below.

但し、ＳＤ₂は前記第２の分配用配管の径、ＳＤ₁は前記第１の分配用配管の径、ＳＮ₁は前記第１の分配層分配器で冷却液が分配される分配数、
から求められる、付記１又は２に記載の情報処理装置。
（付記４）前記第１の分配用配管の径と前記第２の分配用配管の径は同一の大きさで形成されている、付記１に記載の情報処理装置。
（付記５）さらに、前記複数の電子機器を冷却した前記冷却液を合流させる合流器を備え、
前記合流器は、第１の合流層合流器と、前記第１の合流層合流器に接続してさらに前記冷却液を合流させる第２の合流層合流器とを備え、
前記第１の合流層合流器は、前記冷却液を一時的に蓄える、複数の第１の合流用配管を有し、前記複数の第１の合流用配管のそれぞれは、前記第１の合流用配管の軸線が前記情報処理装置の高さ方向に対して平行になるよう配置され、且つ、前記複数の第１の合流用配管は、前記情報処理装置の高さ方向に並べて配置され、
前記第２の合流層合流器は、前記複数の第１の合流用配管にそれぞれ接続する複数の第２の合流用連絡管と、前記複数の第２の合流用連絡管に接続し、前記冷却液を一時的に蓄える第２の合流用配管とを備え、前記複数の第２の合流用連絡管は、前記情報処理装置の高さ方向に並べて配置され、前記第２の合流用配管は、前記第２の合流用配管の軸線が前記情報処理装置の高さ方向に対して平行になるよう配置される、付記１から４のいずれかに記載の情報処理装置。
（付記６）前記第２の合流用配管の径よりも前記第２の合流用連絡管の径の方が小さく形成され、
前記第２の合流用配管の径よりも前記第２の合流用配管の径の方が小さく形成されている、付記５に記載の情報処理装置。
（付記７）前記第２の合流用配管の径は、以下の式、

但し、ＣＤ₁は前記第１の合流層合流器の前記第１の合流用配管の径、ＣＤ₂は前記第２の合流層合流器の前記第２の合流用配管の径、ＣＮ₁は前記第１の合流層合流器にある複数の前記第１の合流用配管から冷却液が合流される合流数、
から求められる、付記５又は６に記載の情報処理装置。
（付記８）前記第１の合流用配管の径と前記第２の合流用配管の径は同一の大きさで形成されている、付記５に記載の情報処理装置。
（付記９）前記第２の合流用配管の軸線が、前記第１の分配用配管の軸線と同軸になるように配置される、付記５から８のいずれかに記載の情報処理装置。 (Appendix 1) An information processing device that cools a plurality of electronic devices stacked in the height direction with a coolant.
A distributor for distributing the coolant is provided.
The distributor includes a first distribution layer distributor and a second distribution layer distributor that is connected to the first distribution layer distributor to further distribute the coolant.
The first distribution layer distributor has a first distribution pipe for temporarily storing the coolant and a plurality of first distribution communication pipes branched from the first distribution pipe. The first distribution pipe is arranged so that the axis of the first distribution pipe is parallel to the height direction of the information processing apparatus, and the plurality of first distribution communication pipes are the same. Arranged side by side in the height direction of the information processing device,
The second distribution layer distributor is connected to each of the plurality of first distribution connecting pipes, includes a plurality of second distribution pipes for temporarily storing the coolant, and the plurality of second distribution pipes. Each of the distribution pipes is arranged so that the axis of the second distribution pipe is parallel to the height direction of the information processing apparatus, and the plurality of second distribution pipes have the information. Information processing equipment arranged side by side in the height direction of the processing equipment.
(Appendix 2) The diameter of the first distribution connecting pipe is formed to be smaller than the diameter of the first distribution pipe.
The information processing apparatus according to Appendix 1, wherein the diameter of the second distribution pipe is formed to be smaller than the diameter of the first distribution pipe.
(Appendix 3) The diameter of the second distribution pipe is based on the following formula.

However, SD ₂ is the diameter of the second distribution pipe, SD ₁ is the diameter of the first distribution pipe, and SN ₁ is the number of distributions to which the coolant is distributed by the first distribution layer distributor.
The information processing device according to Appendix 1 or 2, which is obtained from.
(Appendix 4) The information processing apparatus according to Appendix 1, wherein the diameter of the first distribution pipe and the diameter of the second distribution pipe are formed to be the same size.
(Appendix 5) Further, a merging device for merging the cooling liquids that have cooled the plurality of electronic devices is provided.
The merging device includes a first merging layer merging device and a second merging layer merging device that is connected to the first merging layer merging device and further merges the coolant.
The first merging layer merging device has a plurality of first merging pipes for temporarily storing the coolant, and each of the plurality of first merging pipes is used for the first merging. The axes of the pipes are arranged so as to be parallel to the height direction of the information processing device, and the plurality of first merging pipes are arranged side by side in the height direction of the information processing device.
The second merging layer merging device is connected to a plurality of second merging connecting pipes connected to the plurality of first merging pipes, and the plurality of second merging connecting pipes, and the cooling is performed. The second merging pipe for temporarily storing the liquid is provided, and the plurality of second merging connecting pipes are arranged side by side in the height direction of the information processing apparatus, and the second merging pipe is arranged. The information processing device according to any one of Appendix 1 to 4, wherein the axis of the second merging pipe is arranged so as to be parallel to the height direction of the information processing device.
(Appendix 6) The diameter of the second merging connecting pipe is formed to be smaller than the diameter of the second merging pipe.
The information processing apparatus according to Appendix 5, wherein the diameter of the second merging pipe is formed to be smaller than the diameter of the second merging pipe.
(Appendix 7) The diameter of the second merging pipe is based on the following formula.

However, CD ₁ is the diameter of the first merging pipe of the first merging layer merging device, CD ₂ is the diameter of the second merging pipe of the second merging layer merging device, and CN ₁ is the diameter of the second merging pipe. The number of merging liquids merging from the plurality of first merging pipes in the first merging layer merging device,
The information processing device according to Appendix 5 or 6, which is obtained from.
(Appendix 8) The information processing apparatus according to Appendix 5, wherein the diameter of the first merging pipe and the diameter of the second merging pipe are formed to be the same size.
(Supplementary note 9) The information processing apparatus according to any one of Supplementary note 5 to 8, wherein the axis of the second merging pipe is arranged so as to be coaxial with the axis of the first distribution pipe.

1, 1a, 2 Server equipment 10, 110, 210 Distributor 11 _{, 11 1} , 11 ₂ Distributing pipe 12 _{, 12 1} , 12 ₂ Distributing connecting pipe 13, 13 _{1 , 13 2} Distributing layer distributor 20, 120 Confluence Vessels 21 _{, 21 1} , 21 ₂ Confluence piping 22 _{, 22 1} , 22 ₂ Confluence connecting pipes 23, 23 _{1 , 23 2} Confluence layer merging device 32 Housing 33 Heat exchanger 34 Water supply pipe 35 Drain pipe 40 Electronic equipment 41 Printed board 42 Integrated circuit 43 Electrical connector 44 Cold plate 45 Pipe 46 Coupler 47 Inlet 48 Outlet

Claims (7)

An information processing device that cools multiple electronic devices stacked in the height direction with a coolant.
A distributor for distributing the coolant is provided.
The distributor includes a first distribution layer distributor and a second distribution layer distributor that is connected to the first distribution layer distributor to further distribute the coolant.
The first distribution layer distributor has a first distribution pipe for temporarily storing the coolant and a plurality of first distribution communication pipes branched from the first distribution pipe. The first distribution pipe is arranged so that the axis of the first distribution pipe is parallel to the height direction of the information processing apparatus, and the plurality of first distribution communication pipes are the same. Arranged side by side in the height direction of the information processing device,
The second distribution layer distributor is connected to each of the plurality of first distribution connecting pipes, includes a plurality of second distribution pipes for temporarily storing the coolant, and the plurality of second distribution pipes. Each of the distribution pipes is arranged so that the axis of the second distribution pipe is parallel to the height direction of the information processing apparatus, and the plurality of second distribution pipes have the information. Arranged side by side in the height direction of the processing equipment ,
Further, a merging device for merging the cooling liquids obtained by cooling the plurality of electronic devices is provided.
The merging device includes a first merging layer merging device and a second merging layer merging device that is connected to the first merging layer merging device and further merges the coolant.
The first merging layer merging device has a plurality of first merging pipes for temporarily storing the coolant, and each of the plurality of first merging pipes is used for the first merging. The axes of the pipes are arranged so as to be parallel to the height direction of the information processing device, and the plurality of first merging pipes are arranged side by side in the height direction of the information processing device.
The second merging layer merging device is connected to a plurality of second merging connecting pipes connected to the plurality of first merging pipes, and the plurality of second merging connecting pipes. A second merging pipe for temporarily storing the coolant is provided, and the plurality of second merging connecting pipes are arranged side by side in the height direction of the information processing apparatus, and the second merging pipe is arranged side by side. Is arranged so that the axis of the second merging pipe is parallel to the height direction of the information processing apparatus.
The shaft of the second confluence pipe, Ru is arranged so as to be coaxial with the axis of said first distribution pipe, the information processing apparatus. The diameter of the first distribution connecting pipe is formed to be smaller than the diameter of the first distribution pipe.
The information processing apparatus according to claim 1, wherein the diameter of the second distribution pipe is formed to be smaller than the diameter of the first distribution pipe. The diameter of the second distribution pipe is calculated by the following formula.

However, SD ₂ is the diameter of the second distribution pipe, SD ₁ is the diameter of the first distribution pipe, and SN ₁ is the number of distributions to which the coolant is distributed by the first distribution layer distributor.
The information processing apparatus according to claim 1 or 2, which is obtained from the above. The information processing apparatus according to claim 1, wherein the diameter of the first distribution pipe and the diameter of the second distribution pipe are formed to be the same size. The diameter of the second merging connecting pipe is formed to be smaller than the diameter of the second merging pipe.
The information processing apparatus according to claim 1 , wherein the diameter of the first merging pipe is formed to be smaller than the diameter of the second merging pipe. The diameter of the second merging pipe is based on the following formula.

However, CD ₁ is the diameter of the first merging pipe of the first merging layer merging device, CD ₂ is the diameter of the second merging pipe of the second merging layer merging device, and CN ₁ is the diameter of the second merging pipe. The number of merging liquids merging from the plurality of first merging pipes in the first merging layer merging device,
The information processing apparatus according to claim 1 or 5 , which is obtained from the above. The information processing apparatus according to claim 1 , wherein the diameter of the first merging pipe and the diameter of the second merging pipe are formed to be the same size.

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