JP2011191974A - Information device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information device capable of densely accumulating servers by eliminating a cold aisle for air cooling or a ventilation flue in a rack. <P>SOLUTION: The information device includes: a rack 20 for housing two servers 1A, 1B each having an air inlet 5 and an exhaust outlet 4 in a rear panel 2, with the air inlet of each of the two servers facing the exhaust outlet of the other server; a heat exchanger 6, placed between the rear panels of the two servers, for cooling exhaust air 22 from the exhaust outlet of one of the servers down to make cold air and leading the cold air as intake air 23 into the air inlet of the other server; and air blowers 7 for generating a circulating flow 24 of the cold air to circulate between the two servers, through the inside of one server, the exhaust outlet thereof, the heat exchanger, the air inlet of the other server, the inside of the other server, the exhaust outlet thereof, the heat exchanger, and the air inlet of the one of the servers, and then back to the inside of the one server again. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to information equipment.

  With the recent progress of IT systems in the cloud, there is an increasing demand for dense integration of many high-performance servers in a limited space in a data center. However, high-performance servers generate a large amount of heat, and a highly efficient server cooling system is indispensable for high integration.

  In a conventional information device, a plurality of servers are stacked and accommodated in a rack so that the front and rear panels face the cold aisle and hot aisle, respectively, and cold air from the server aisle is sucked from the server front panel. The server was cooled by exhausting air from the back panel to the hot aisle. However, since cold aisles and hot aisles are provided, it is difficult to increase the integration density of servers in the entire data center.

  Therefore, an information device using a sealed server cooling system in which a large number of servers are accommodated in a closed rack and cool air is circulated in the rack without constructing a cold aisle or hot aisle has been devised. Has been.

  As such a hermetic cooling system, a system in which a large number of server trays are arranged in a line in a horizontal direction via a heat exchanger and accommodated in a rack is known. In this cooling system, the cool air (exhaust) heated in the windward server is cooled through the heat exchanger by flowing cool air in the row direction through the server and the heat exchanger in one direction, and the lee Send it into the server and cool it down. Therefore, cold aisle and hot aisle facilities are not required.

  On the other hand, in order to integrate server trays with high density, an information device is known in which half-depth servers having a half depth are accommodated in a rack back to back.

  FIG. 6 is a partial perspective view of a conventional information device, and represents two half-depth servers housed in a rack. FIG. 6 shows a pair of servers constituting one stage among the half-depth servers stacked in multiple stages and accommodated in the rack.

  Referring to FIG. 6, in this conventional information device, two servers 101A and 101B (half depth server) that make a pair are accommodated in a rack with the back panel 2 facing each other. The front panel 3 of the servers 101A and 101B is provided with an intake port 5 and the rear panel 2 is provided with an exhaust port 4. Cold air (intake air 23) drawn from the intake ports 5 of both servers 101A and 101B is After the inside of 101A and 101B is cooled, it is discharged as exhaust 22 from the exhaust port 4.

  The information device is installed with the front panel 3 facing the cold aisle 103 and the back panel facing the hot aisle 102 (or an exhaust ventilation path provided in the device). Therefore, although a large number of servers 101A and 101B can be accommodated in the rack at a high density, the server integration density of the data center is limited by the arrangement of the cold aisle 103 and the hot aisle 102 (or the ventilation path).

JP 2008-234428 A US Pat. No. 7,355,847

  In the information equipment using the server cooling system that sucks cold air from the conventional cold aisle into the server and exhausts it to the hot aisle, the cold aisle and the hot aisle are arranged, which limits the integration density of servers in the entire data center. There is a problem that.

  Conventional information equipment using the above-described hermetic cooling system in which servers are arranged in a row through a heat exchanger and cool air is passed in one direction of the row does not require cold aisle and hot aisle, and the server has high density. Can be accommodated.

  However, since the cold air has the same air volume for all the servers constituting one row, the cooling capacity of the heat exchanger must be matched to the server having the largest heat generation amount among the servers constituting the row. For this reason, some servers have excessive cooling capacity, and it is difficult to construct an efficient cooling system.

  On the other hand, a conventional information device in which the above-described two half-depth servers are paired with the rear panel facing each other and the pairs are stacked and accommodated in a rack can accommodate the servers in the rack with high density. . However, there is a problem that the server integration density of the entire data center is limited because of the need for cold air and exhaust ventilation paths such as cold aisle and hot aisle.

  According to one aspect of the present invention for solving the above-described problem, according to one aspect of the present invention, a first server and a second server having an intake port and an exhaust port on a back panel are connected to the intake air of each server. A rack that holds the back panels of the two servers facing each other so that a mouth and the exhaust port face each other, and the back panels of the first and second servers, Between the first and second servers, a heat exchanger that cools the hot air discharged from the exhaust port of the server to cool air and introduces it into the intake port of the other server. The exhaust port of one of the servers, the heat exchanger, the intake port of the other server, the other server, the exhaust port of the other server, the heat exchanger, and the intake port of the one server. Cycle through the path back into one of the servers again. , A blower for generating a circulation flow of the cold air that is provided as an information device having a.

  In the information device of the present invention, two servers are accommodated in the rack with the back panels facing each other, so that the server accommodation density in the rack is high. In addition, since the hermetic cooling system is used, it is possible to increase the server accommodation density of the data center by omitting ventilation paths such as cold aisle and hot aisle. On the other hand, since the cold air circulates between the two servers and is cooled by the heat exchanger in the middle of the circulation, the cooling capacity of the heat exchanger can be adjusted for each pair of servers. For this reason, the cooling system of information equipment can be easily made into a system with high cooling efficiency having necessary and sufficient cooling capacity.

1 is a perspective view of an information device according to a first embodiment of the present invention. 1 is a horizontal sectional view of an information device according to a first embodiment of the present invention. Assembly drawing showing arrangement of heat exchanger of first embodiment of the present invention The cooling plate perspective view of a 1st embodiment of the present invention. Horizontal section of information equipment according to second embodiment of the present invention Partial perspective view of conventional information equipment

  The first embodiment of the present invention relates to an information device in which two identical servers (first and second servers) are housed in a rack with their back panels facing each other and cooled by a hermetic cooling system.

  FIG. 1 is a perspective view of an information device according to a first embodiment of the present invention, and shows a main configuration of a server accommodated in a rack and a server cooling system.

  Referring to FIG. 1, in the information equipment according to the first embodiment of the present invention, a heat exchanger 6 and two servers 1A, 1B (first server 1A and second server) are placed in a sealed rack 20. 1B) For example, two sets of half-depth servers are taken as one set, and a plurality of sets are stacked and accommodated.

  The rack 20 constitutes a hermetically sealed shell, and includes doors 20a on the front and rear surfaces (left and right rack side surfaces in FIG. 1). This door 20a and the servers 1A and 1B are used for housing and checking. Further, the entire surface of the rack 20 is covered with an outer peripheral wall 21 (see FIG. 2) made of a heat insulating and sound insulating material. The outer peripheral wall 21 can hermetically seal the rack 20. The outer peripheral wall 21 may not be provided if not necessary.

  The inside of the rack 20 is horizontally divided by a partition plate 26 installed horizontally, and each of the divided areas becomes an accommodation chamber 25 having a height for accommodating the servers 1A and 1B. That is, the storage chamber 25 is formed in the rack 20 by being laminated. For each of the storage chambers 25, two servers 1A and 1B having a plate-like blade-shaped outer shape are horizontally inserted from the door 20a side toward the back and stored.

  As will be described later, the heat exchanger 6 is arranged at the center of the storage chamber 25 so as to divide the storage chamber 25 into the front and rear. Therefore, the server 1 </ b> A and the server 1 </ b> B are arranged on both sides of the heat exchanger 6 in a direction in which the back panels 2 face each other, that is, the back panel 2 faces the heat exchanger 6. As described above, a plurality of sets each including the heat exchanger 6 and the two servers 1 </ b> A and 1 </ b> B are accommodated in the rack 20.

  The partition plate 26 for forming the storage chamber 25 in the rack 20 blocks the mixing of the air flow (cold air circulation flow 24) between the storage chambers 25 adjacent to each other in the vertical direction. Disturbances in the cold air circulation due to the cold air mixing are avoided. Of course, it is not necessary to block the ventilation of the cold air if there is no disturbance that causes a problem in the circulation of the cold air, and the server 1A, 1B, etc. may be supported by using a member having ventilation properties instead of the partition plate. it can.

  The heat exchanger 6 is installed at the center of the rack 20 (left and right center in FIG. 1) so as to separate the accommodation chamber 25 from front to back (left and right direction in FIG. 1). One heat exchanger 6 is provided for each accommodation room 25, that is, for each pair of servers 1A and 1B.

  In this configuration, the cooling capacity of the heat exchanger 6 can be adjusted according to the heat generated by each pair of servers 1A, 1B. Therefore, it is possible to operate the information device 40 including a plurality of sets of servers in a state of the minimum necessary cooling capacity, and high cooling efficiency is realized.

  As described above, the heat exchanger 6 and the two servers 1 </ b> A and 1 </ b> B are set as one set, and one set is stored in each of the storage chambers 25 that are stacked in the vertical direction on the rack 20. As a result, a set including the heat exchanger 6 and the two servers 1A and 1B is stacked and accommodated in multiple stages in the rack in the vertical direction.

  FIG. 2 is a horizontal sectional view of the information device according to the first embodiment of the present invention. The servers 1A and 1B and the heat exchange accommodated in the accommodation chamber 25 (see FIG. 1) formed by dividing the inside of the rack 20 horizontally. 1 represents a set of horizontal arrangements of the vessel 6. In addition, a horizontal cross section is a horizontal surface which passes through the upper part of server 1A, 1B.

  Referring to FIG. 2, heat exchanger 6 is arranged to divide storage chamber 25 into the front and rear (in FIG. 2, the left and right sides of the page). The heat exchanger 6 is provided for each pair of two servers 1A and 1B, for example.

  Each of the servers 1A and 1B is a half-depth server composed of a flat box-shaped housing that accommodates electronic components, both of which are in the left-right symmetric (vertical object in FIG. 2) position of the rear panel 2, that is, the rear panel. An exhaust port 4 and an intake port 5 are opened at a plane-symmetrical position with a vertical plane perpendicular to 2 as a plane of symmetry. Therefore, when the rear panels 2 of the two servers 1A and 1B are opposed to each other in the accommodation room 25, the exhaust port 4 of the server 1A faces the intake port 5 of the server 1B, and the intake port 5 of the server 1A is the server 1B. It faces the exhaust port 4. Each of the servers 1A and 1B is provided with a blower 7 (for example, a fan) in contact with, for example, the air inlet 5. The blower 7 blows the intake air 23 sucked from the intake port 5 into the servers 1A and 1B, flows in the servers 1A and 1B in a semicircular shape, and then exhausts the exhaust 23 as exhaust 23 from the exhaust port 4.

  At this time, the warm exhaust gas 22 discharged from the exhaust port 4 of one server passes through the heat exchanger 6 disposed between the servers 1A and 1B, and is cooled to become cold cold air. From the intake port 25 to the other server. As a result, the air flows through the intake port 5 of the server 1A in a semicircular shape inside the server 1A, is discharged from the exhaust port 4 of the server 1A, is cooled through the heat exchanger 6, and passes through the intake port 5 of the server 1B. After flowing in the semicircular shape in 1B, the air is discharged from the exhaust port 4 of the server 1B, cooled by passing through the heat exchanger 6, and recirculated cool air 24 is drawn from the intake port 5 of the server 1A. The The exhaust 22 and the intake air 23 constitute a part of the circulation flow 24.

  A motherboard 14 is installed horizontally in the servers 1A and 1B, and the CPU 11, the memory module 13, the hard disk 12, and other electronic components are mounted on the motherboard 14. Since the CPU 11 generating a large amount of heat is cooled with a high cooling capacity, the CPU 11 is placed near the intake port 5 so as to be cooled by cold air immediately after passing through the heat exchanger 6. In addition, parallel plate-shaped cooling fins are provided on the upper surface of the CPU 11, and the heat radiation surface (plate surface) of the cooling fins is disposed in parallel to the flow of the intake air 23. In addition, the DIMM (Dual Inline Memory Module) standard memory module 13 has a main surface on which a memory chip is mounted perpendicular to the upper surface of the air inlet 4 and the motherboard 14 and is downstream of the CPU 11 (on the opposite side of the air inlet 5 with the CPU 11 in between). ) On the motherboard 14). Further, the hard disk 12 is arranged at a position away from these heat generating components, for example, a semiconductor device that generates heat, for example, at the farthest corner located diagonally from the CPU 11. Therefore, the circulating flow 24 cools the CPU 11 and the memory module 13, then cools the hard disk 12 (for example, a side surface that is a heat radiating surface), and is discharged from the exhaust port 4.

  Next, the heat exchanger 6 of the first embodiment will be described in detail.

  FIG. 3 is an assembly diagram showing the arrangement of the heat exchanger according to the first embodiment of the present invention, and shows the structure and installation position of the heat exchanger 6. FIG. 4 is a perspective view of the cooling plate according to the first embodiment of the present invention, and shows a refrigerant pipe through which a refrigerant flows.

  Referring to FIG. 3, the heat exchanger 6 of the first embodiment includes a cooling plate 6a composed of two cooling plates 6a ′ and 6a ″ installed horizontally between two servers 1A and 1B, and a cooling plate. The heat exchange fin 6b provided on the upper surface of the plate 6a ′ and the heat exchange fin 6c provided on the upper surface of the cooling plate 6a ″ are provided.

  The cooling plates 6a 'and 6a "are made of a plate made of a good heat conductive material, for example, a copper rectangular flat plate, and face the exhaust port 4 of one of the two servers 1A and 1B and the exhaust port 4 thereof. The cooling plate 6a ′, 6a ″ is cooled by using a refrigerant, and the fins 6b disposed on the cooling plate 6a ′, 6a ″, as will be described later. 6c is cooled by heat conduction.

  The fins 6b and 6c of the heat exchanger 6 are constituted by parallel plates made of a good heat conductive material, for example, parallel copper plates, and are provided in close contact with or integrally with the upper surfaces of the cooling plates 6a ′ and 6a ″. Accordingly, the fins 6b and 6c are disposed between the opposing exhaust port 4 and the intake port 5. Further, the plate surfaces (surfaces on which heat exchange is performed) of the fins 6b and 6c are the exhaust 22 and the intake 23. So that the fin 6b is located between the exhaust port 4 of the server 1B and the intake port 5 of the server 1A among the two pairs of fins 6b and 6c. The fin 6c is installed between the exhaust port 4 of the server 1A and the intake port 5 of the server 1B.

  The fins 6b and 6c having such a structure cool the warm exhaust gas 22 discharged from the exhaust port 4 and guide it to the intake port 5 of the other server as a cold intake air 23, that is, a cooling function as a heat exchanger, It also has a function as a rectifying plate that rectifies the exhaust 22 and leads it to the intake port 5. By providing the heat exchanger 6 with the function of a rectifying plate in this way, partial dissipation of the circulation flow 24 or inflow of outside air and turbulence of the flow are suppressed, so that the cooling efficiency is increased and the maintenance of the circulation flow 24 is efficient. I can do it well.

  As described above, the two cooling plates 6a ′ and 6a ″ are provided vertically adjacent to the flow of the exhaust 22 and the intake air 23. Among these, the cooling plate 6a ′ is connected to the exhaust port 4 of the server 1B. It is installed on the partition plate 26 below the space between the intake ports 5 of the server 1A (the region where the fins 6b of the heat exchanger 6 are disposed), and the cooling plate 6a ″ is connected to the exhaust port 4 of the server 1A and the server It is installed on the partition plate 16 at the lower part of the space between the inlets 5 of 1B (region where the fins 6c of the heat exchanger 6 are disposed). The fins 6b and 6c are provided in close contact with or integrally with the upper surfaces of the cooling plates 6a 'and 6a ", respectively.

  Referring to FIG. 4, the cooling plates 6a ′ and 6a ″ meander in parallel to the plate surface from the exhaust 22 side (side closer to the exhaust port 4) toward the intake 23 side (side closer to the intake port 5). The meandering refrigerant pipe 32 is constituted by a plurality of pipe parts extending perpendicularly to the exhaust 22 and the intake air 23 as main pipes, for example. The both ends of a plurality of pipeline parts are connected by a curved part to constitute a folded part.

  The tip of the refrigerant pipe 32 on the exhaust 22 side serves as an inlet 32a into which the cold refrigerant 33 cooled by the chiller 30 (see FIG. 1) flows, and the tip on the intake 23 side is a warm refrigerant after heat exchange. 33 becomes the outflow port 32b which flows out. Therefore, the cooling plate 6 has a temperature distribution in which the side of the inlet 32a into which the cold refrigerant 33 flows is cooled to the lowest temperature and rises toward the outlet 32b where the refrigerant temperature rises. In this way, by reversing the flow direction of the refrigerant 33 in the two cooling plates 6a ′ and 6a ″, the heat exchange capacities of the two heat exchange fins 6b and 6c become equal, and the design of the cooling system is facilitated. Of course, if different cooling capacities are required for the two cooling plates 6a ′ and 6a ″, the shape of the refrigerant pipes 32 of each of the two cooling plates 6a ′ and 6a ″, the flow rate of refrigerant, the temperature, It is necessary to appropriately design the inflow direction and the like as appropriate.

  The supply of the refrigerant 33 to the refrigerant pipe 32 described above is performed by supplying the refrigerant 33 cooled by the chiller 30 (see FIG. 1) installed outside the rack 20 through the refrigerant delivery pipe 31a to the inlet of the refrigerant pipe 32. It is made by supplying to 32a. At this time, the refrigerant delivery pipe 31a is bifurcated, and the end of each branch is connected to the respective inlets 32a of the two cooling plates 6a ′ and 6a ″. On the other hand, the refrigerant 33 that has flowed through the refrigerant pipe 32 is The refrigerant is recovered into the chiller 30 from the refrigerant recovery pipe 31b that merges the branches through the branch of the refrigerant recovery pipe 31b connected to the respective outlets 32b of the two cooling plates 6a ′ and 6a ″. In this way, the refrigerant 33 having the same temperature and flow rate is supplied to the two cooling plates 6a ′ and 6a ″. The refrigerant delivery pipe 31a and the refrigerant recovery pipe 31b (see FIG. 1) are connected to the servers 1A and 1B. It is provided so as to penetrate the space vertically, and is branched for each storage chamber 25 and connected to the cooling plate 6.

  In the first embodiment described above, the cool air for air cooling circulates between the two servers 1A and 1B installed in the one-stage storage room 25, so that a cold air ventilation path is provided outside the storage room 25. do not need. For this reason, a cooling system becomes small. At this time, since cool air may be confined in the storage chamber 25, the entire rack 20 or each storage chamber 25 is formed by using the outer wall of the rack 20 or the outer wall of each storage chamber 25 as the outer peripheral wall 21 made of a material having a sound insulating and heat insulating effect. It is also possible to seal with the outer peripheral wall 21. This realizes an information device that has high sound insulation properties and high thermal efficiency for shielding fan noise, and that avoids the inflow of dust into the server when cold air is introduced from the outside. Furthermore, since the cooling capacity of the heat exchanger 6 can be freely adjusted according to the amount of heat generated by the servers 1A and 1B for each storage chamber 25, the thermal efficiency of the entire cooling system can be increased. In addition, since the two servers 1A and 1B are arranged at 180 ° rotationally symmetric positions, the same server can be used, and the server can be easily designed and manufactured.

  In the information device according to the first embodiment, one unit installed vertically through a plurality of storage chambers 25 with respect to a plurality of sets of servers 1A and 1B stored in a plurality of storage chambers 25 connected vertically. It is also possible to provide a heat exchanger. Further, if necessary, the cooling capacity may be adjusted by controlling the air flow rate of the fins provided in each of the servers 1A and 1B.

  2nd Embodiment of this invention is related with the server which improved the cooling efficiency by arrange | positioning the arrangement | positioning of an internal heat-emitting component so that the circulation flow of cold air may not be disturbed. The information device 41 according to the second embodiment is the same as the information device 40 according to the first embodiment except for the arrangement of components in the servers 1A ′ and 2B ′.

  FIG. 5 is a horizontal sectional view of an information device according to the second embodiment of the present invention, and shows the arrangement of components in the first server 1A ′ and the second server 1B ′ used in the second embodiment.

  Referring to FIG. 5, the first server 1A ′ and the second server 1B ′ used in the information device 41 of the second embodiment are arranged on the motherboard 14 in the same manner as the information device 40 of the second embodiment. In addition to the memory module 13 and the hard disk 12, a chip set 15 for executing specific information processing, an expansion card 17, and an expansion memory module 16 for specific information processing are provided.

  The CPU 11 is provided with cooling fins arranged on the upper surface in parallel with the flow lines of the intake air 23. Therefore, the circulating flow 24 (that is, the intake air 23) passes between the fins on the CPU without changing the direction as in the first embodiment.

  The memory module 13 and the extended memory module 16 are located at the corner of the motherboard 14 downstream of the CPU 11 (the downstream side of the circulation flow 24), and the heat radiation surfaces (usually the main board surface) of the memory modules 13 and 16 are perpendicular to the top surface of the motherboard 14. And are arranged so as to form opposite sides with the corners of the mother board 14 as apex angles. These substrates arranged in parallel with the memory modules 13 and 16 function as rectifying plates.

  Therefore, the circulating flow 24 that has passed over the CPU 11 is changed in wind direction by, for example, 45 degrees by the substrates of the memory modules 13 and 16, and then the flow changes by 90 degrees from the original wind direction so as to flow along the front panel 3. . At this time, by arranging the component functioning as the current plate at an angle with respect to the original flow, in other words, by arranging the plate surface functioning as the current plate along the flow of the circulation flow 24, the intake port The direction of the circulating flow 24 can be changed so that the circulating flow 24 sucked from 5 flows along the front panel 3 while suppressing the occurrence of turbulence.

  The hard disk 12 is arranged at the corner of the mother board 14 that is opposite to the corner where the CPU 11 is placed so that the heat radiation surface (outer surface) of the hard disk 12 is opposite to the corner. The chip set 15 is arranged so that the heat radiating surface of the heat radiating fin provided on the upper surface thereof is opposite to the corner.

  Therefore, the circulation flow 24 flowing in parallel with the front panel 3 is changed in the flow direction along the heat radiation surface (outer surface) of the hard disk 12 and the heat radiation surface of the heat radiation fins, and becomes a flow toward the exhaust port 4. Even when the flow of the circulating flow 24 is changed by 90 degrees, the heat dissipation surface of the hard disk 12 obliquely divides the corners, so that the circulation flow 24 changes its direction gently along the heat dissipation surface of the hard disk 12. For this reason, generation | occurrence | production of a big turbulent flow is suppressed. Further, in the region where the direction is changed away from the corner of the circulating flow 24, the disturbance is similarly suppressed by the rectifying function of the heat dissipating fins of the chipset 15.

  The expansion card 17 is disposed downstream of the hard disk 1 and the chip set 15 and near the exhaust port 4. The substrate of the expansion card 17 is provided so that the substrate surface is vertical and parallel to the flow of the circulating flow 24, that is, perpendicular to the exhaust port 4. Accordingly, the substrate of the expansion card 17 is provided along the circulation flow 24 and functions as a current plate.

  As described above, in the servers 1A ′ and 1B ′ of the second embodiment, the cooling fins of the heat generating components or the heat radiating surface of the hard disk is arranged along the circulation flow 24, so that it functions as a current plate. Suppresses the generation of turbulence. For this reason, the ventilation efficiency of the air blower 7 which produces | generates and maintains the circulation flow 24 can be made high.

  By applying the present invention to information equipment integrated in a data center, cold aisle and hot aisle are not required, and no ventilation path is provided in the rack, thereby realizing high integration density of servers in the data center. can do.

1A, 1B, 1A ′, 1B ′, 101A, 101B Server 2 Rear panel 3 Front panel 4 Exhaust port 5 Inlet port 6 Heat exchanger 6a, 6a ′, 6a ″ Cooling plate 6b, 6c Fin 7 Blower 11 CPU
DESCRIPTION OF SYMBOLS 12 Hard disk 13, 16 Memory module 14 Motherboard 15 Chipset 17 Expansion card 20 Rack 20a Door 21 Outer peripheral wall 22 Exhaust 23 Intake 24 Circulation flow 25 Storage chamber 26 Partition plate 30 Chiller 31a Refrigerant delivery pipe 31b Refrigerant recovery pipe 32 Refrigerant pipe line 32a Inlet 32b Outlet 33 Refrigerant 40, 41 Information device 102 Hot aisle 103 Cold aisle

Claims (5)

The first server and the second server having an intake port and an exhaust port on the back panel are opposed to the back panels of the two servers so that the intake port and the exhaust port of each server are opposed to each other. A rack to accommodate
Heat that is installed between the back panels of the first and second servers, cools the hot air discharged from the exhaust port of one of the servers to cool air, and introduces it into the intake port of the other server An exchange,
Between the first server and the second server, the exhaust port of one of the servers, the heat exchanger, the intake port of the other server, the other server, the other server A blower that generates a circulating flow of the cold air that circulates in a path returning to the one server again through the exhaust port, the heat exchanger, and the intake port of the one server;
Information equipment with.   The information device according to claim 1, wherein the heat exchanger includes a plurality of cooling fins provided on the back panel between the intake port and the exhaust port facing each other. The heat exchanger is
Two sets of cooling fins respectively provided at the exhaust ports of the first and second servers;
Two cooling plates made of a good heat conductive material, each of which has a plurality of fins fixed on the upper surface;
A refrigerant pipe for flowing a refrigerant having a plurality of pipe sections extending in the vertical direction of the fins, provided meandering parallel to the plate surface of the cooling plate in the cooling plate;
An inlet of the refrigerant provided at a tip near the exhaust port of the refrigerant pipe;
An outlet of the refrigerant provided at a tip near the exhaust port of the refrigerant pipe;
The information device according to claim 2, further comprising:   4. The information according to claim 1, wherein the heat generating component housed in the server is arranged in the server such that a main surface to be air-cooled follows the circulation flow of the cold air. machine.   The information equipment according to claim 1, wherein the rack is housed in an outer peripheral wall having heat insulation and sound insulation.