JP2010054074A - Air conditioning system for electronic communication device room or the like - Google Patents

Abstract

An air conditioning system capable of effectively cooling a plurality of racks that house electronic communication devices such as servers is provided.
A plurality of racks each having an air suction port on one of the front surface and the rear surface and an air discharge port on the other surface of the front surface and the rear surface form a row. Air conditioning system for placed rooms. A heat exchanger of a cooler is disposed in the vicinity of the air outlet of the rack, and the exhaust air that has passed through the heat exchanger is passed from the air outlet of the rack to the air by heat exchange action of the heat exchanger. Cooling to a temperature approximately equal to the temperature of the intake air taken into the rack from the suction port. In addition, in order to eliminate the influence of radiant heat from other rack rows and realize effective cooling by the cooler, a one-way flow is formed in the air flowing through the racks and in the room. To do.
[Selection] Figure 1

Description

  The present invention relates to an air conditioning system, and more particularly to an air conditioning system suitable for a data center room in which racks for accommodating electronic communication devices such as servers are collectively accommodated.

  In the data center room, a plurality of racks that house a large number of electronic communication devices such as servers serving as heat generation sources are arranged in a row. In such an air conditioning system for a room, a cooling passage is generally formed by using the underfloor space of the room, and cold air is supplied to the racks of each rack row from an air outlet formed on the floor surface from the cooling passage. Thus, the server accommodated in each rack is cooled (for example, see Patent Documents 1 and 2).

JP 2005-308345 A JP 2006-64303 A

  However, in the air conditioning system using the cooling passage using the underfloor space, the height of the building is increased by the height required for the underfloor space, and the construction cost is increased from the viewpoint of earthquake resistance.

  Also, the rack rows are arranged facing each other so that the air inlets provided on the front of each rack face each other, and cold air is blown out from under the floor between the rack rows facing the air inlets, or from the bottom of the rack to the inside of the rack. Attempts have been made to guide the cold air from under the floor. According to this, it is possible to effectively guide the cool air from under the floor to each rack and cool the electronic communication device accommodated in the rack. However, in either of these cases, the air flowing through the room through the rack does not flow in one direction, and cooling efficiency is reduced due to the mixing of the cold air and the warm air heated by the waste heat in the rack.

  In addition, there is a tendency to increase the blown air speed due to the restriction of the floor blowing area. In this case, the difference in the intake air amount between the upper and lower parts of the rack increases, so an electronic device such as a server installed at the lower part of the rack. Insufficient cooling of equipment.

  Therefore, an object of the present invention is to provide an air conditioning system that effectively cools a plurality of racks that house electronic communication devices such as servers.

  In the present invention, a plurality of racks each having an air suction port on one of the front surface and the rear surface and an air discharge port on the other surface of the front surface and the rear surface are arranged in a plurality of rows. In the air conditioning system for a room, a heat exchanger is disposed opposite to the air discharge port or the air suction port of the rack, and the heat exchange action of the heat exchanger causes the heat exchanger to pass through the heat exchanger. By cooling the air so that the air has a temperature substantially equal to the temperature of the air before passing through the heat exchanger, the exhaust heat from the air outlet of the rack to the room is prevented, and Further, in order to realize the effective cooling by the cooler having the heat exchanger and the air blowing means provided in association with the heat exchanger by eliminating the influence of radiant heat from other rack rows. Through The air flowing through the serial room, to form a unidirectional flow, to build on the basic idea.

  That is, the air conditioning system according to the present invention is a plurality of racks each housing a plurality of electronic communication devices, each having an air inlet on one of the front and rear surfaces, An air conditioning system for a room in which a plurality of racks provided with air outlets on the other side of the rear surface are arranged, and the rows are arranged in a plurality of rows, and in the vicinity of the rack, the rack A heat exchanger and a blower arranged to face the air outlet or the air inlet of the rack to cool the air discharged from the air outlet or the intake air to the air inlet to the rack; A cooling source mechanism for supplying a refrigerant to the heat exchanger, and the air flowing in the room through the racks forms a one-way flow so that the rack rows are arranged in the rack rows. The racks are arranged such that the orientation of the one surface of the racks coincides and the orientation of the one surface of the racks of the rack row spaced apart from each other coincides, and the heat exchanger and the blowing means are The air passing through the heat exchanger is cooled to prevent an increase in the temperature of the room due to waste heat from the rack.

  According to the present invention, due to the heat exchange action of the heat exchanger disposed opposite to the air discharge port or the air suction port of each rack, the discharge to the room is performed for each rack row as the heat generation source. Reduction of heat can be achieved. In addition, since a one-way flow is formed in the air flowing through the racks and in the room, the influence of radiant heat from other rack rows is eliminated and the indoor air temperature is effectively reduced. Since the uniformity can be achieved, the rack can be effectively cooled.

  A plurality of the heat exchangers and air blowing means are provided for each rack row, and the waste heat discharged from the corresponding rack row is processed for each rack row by the plurality of heat exchangers and air blowing means, respectively. desirable. The heat exchanger may be a cooling coil that cools the intake air with a heat medium. The operation of the air blowing means is controlled according to the load on the rack.

  The interior of the room is divided into (n + 1) compartments by n partitions that are parallel to each other, and each of the rack rows is arranged in n rows (rows) so as to form a part of each partition. can do. A portion of each partition excluding the rack row is provided with a communication port that allows air to flow from the compartment having a higher pressure to the compartment having a lower pressure than the adjacent compartment. Can do.

  Positioned at the uppermost stream where the air inlet of the rack in the first row of racks opens from the (n + 1) th compartment located at the most downstream position where the air outlet of the rack of the nth row of racks opens. An air return path to the first compartment can be formed outside the room. Thereby, it is possible to effectively reuse the cold air without exhausting it.

  Each partition may be provided with an open / close door that allows people to enter and exit the compartments. This frees people from entering and exiting the compartments without interrupting the air conditioning system, thereby facilitating manual maintenance management of the electronic communication devices in the racks.

  In each of the rack rows, the section from which exhaust air from the rack of the rack row corresponding to the heat exchanger and the air blowing unit that has failed when the heat exchanger and the air blowing unit (cooler) are broken is discharged. Air deflection means may be provided for causing the exhaust air to circulate in the chamber. As a result, when a failure occurs in a part of the heat exchanger and the air blowing means of the rack row, the air deflecting means can function.

  Due to the operation of the air deflecting means, the waste heat from the rack corresponding to the heat exchanger and the air blowing means to be failed becomes the air cooled by the other heat exchanger and the air blowing means in the rack row to be failed. The mixed state is supplied to the subsequent rack row. Therefore, the reduction of the cooling effect due to the failure can be evenly distributed to the racks in the subsequent rack row. Therefore, even if some of the heat exchangers and the air blowing means have failed, the specific rack corresponding to the failure target is located in the rear rack row including the heat exchanger and the air blowing means in which the failure has occurred. The electronic communication device accommodated in the rack can be prevented from significantly increasing in temperature, and a substantially uniform cooling effect can be obtained in each rack in the subsequent rack row.

  A partition wall that divides the room into left and right spaces can be provided at substantially the center of the room. The left and right spaces communicate with each other at both ends of the partition wall. Each of the left and right spaces is divided into a plurality of compartments by n parallel partitions. Depending on the arrangement pattern of the compartments, (n + 1), n, or (n-1) compartments can be appropriately formed with n partition walls.

A portion of each partition excluding the rack row may be provided with a communication port that allows air to flow toward the adjacent compartment.

  The communication port allows generation of a circulating air flow around each compartment through both ends of each partition wall. Due to the generation of the circulating air flow through the communication port, the room temperature can be made more uniform.

  Opening and closing doors and air deflecting means similar to those described above can be provided in the partitions of the two compartments.

  Water can be used as the refrigerant of the air conditioning system. In this case, the cooling source mechanism includes an intermediate heat exchanger provided corresponding to the heat exchanger of each of the coolers, and a cooling water source in which primary cooling water is circulated between the intermediate heat exchanges. Can be included. Secondary cooling water can be circulated between the heat exchanger and the intermediate heat exchanger of the cooler.

  Thereby, the primary cooling water system and the secondary cooling water system can be fluidly separated by the intermediate heat exchanger, that is, insulated. Therefore, since it is possible to prevent a large amount of water from the cooling water source from leaking into the room and accumulating in the room at the time of failure of the cooler, without causing the electronic communication device to stop operating due to this water leakage, The rack can be suitably cooled with water.

  Moreover, a cooling tower or a cooling water heat storage tank can be used as the cooling water source. Thus, as in the case of using a gas cooling medium, the necessary cooling medium can be collected collectively without using a large number of refrigerators including a number of cooling medium compressors corresponding to the heat exchanger of the cooling machine. It is possible to intensively cool and circulate between the intermediate heat exchanger, and by circulating secondary cooling water between the intermediate heat exchanger and the heat exchanger of the cooler, the The rack can be suitably cooled with water.

  The heat exchanger of the cooler can be disposed outside the rack so as to face the air exhaust port, and exhaust air from the air exhaust port to the heat exchanger is supplied to each heat exchanger. Can be combined with a ventilator to promote.

  By providing the heat exchanger of the cooler outside the rack, maintenance and management of the heat exchanger can be easily performed without stopping the operation of the electronic communication device accommodated in the rack. Moreover, the adoption of the exhaust fan can increase the cooling efficiency of the electronic communication device in the rack.

  According to the present invention, as described above, it is possible to reduce the exhaust heat into the room for each rack row serving as a heat generation source, and to make the indoor air temperature uniform by the flow of air in one direction. Therefore, the rack can be efficiently cooled by the cooler. Therefore, it is possible to effectively cool a large number of racks that house electronic communication devices serving as heat generation sources without using cooling air from the cooling passages using the underfloor space.

  FIG. 1 shows a server room 12 to which an air conditioning system 10 according to the present invention is applied. In the illustrated example, the server room 12 has a space between a floor surface 12a (see FIG. 7) and a ceiling surface 12b (see FIG. 7) of a building 38 (see FIG. 4) as a pair of vertical partition walls 14a and 14b and A pair of horizontal partition walls 14c and 14d are formed in a rectangular shape. The server room 12 preferably receives the temperature-controlled outside air processing air through the air intake port 12c, and the air in the server room 12 is exhausted through the exhaust port 12d. In the illustrated example, an air intake port 12c is provided on the side of one horizontal partition wall 14c, and an exhaust port 12d is provided on the side of the other horizontal partition wall 14d facing the horizontal partition wall 14c.

  In the server room 12, a large number of racks 16 are arranged along the horizontal partition walls 14c and 14d at intervals from the partition walls 14a to 14d, respectively, and the columns are mutually connected along the vertical partition walls (14a and 14b). Are arranged so as to form columns (rows) at intervals. In the example shown in FIG. 1, each rack row (18a to 18d) is composed of seven mutually adjacent racks 16 arranged in parallel, and all rack rows are composed of four rows, that is, four rows.

  In each rack 16, electronic communication devices 20 (see FIG. 7) such as servers well known in the art are accommodated in multiple stages in the height direction. A large number of air inlets 22a (see FIG. 7) are distributed on the front surface 16a of each rack 16. Further, a large number of air discharge ports 22b (see FIG. 7) are dispersedly arranged on the rear surface 16b of each rack 16.

  Each rack 16 is arranged so that the front surface 16a of each rack 16 is aligned in one direction for each rack row. In the example shown in FIG. 1, the front surface 16a of the rack 16 is aligned in one direction in all the rack rows 18 (18a to 18d).

  Each rack row 18a to 18d is vertically connected to the inside of the server room 12 in cooperation with the partition wall 24 which is provided in parallel with the horizontal partition walls 14c and 14d and surrounds each rack row in relation to each rack row 18a to 18d. By dividing into two, the server room 12 is divided into five compartments 26 (26a to 26e). That is, the inside of the server room 12 is divided into (n + 1) compartments 26 by n rows of rack rows 18 and n rows of partition walls 24.

  In such a linear array of compartments, (n + 1) compartments are partitioned by n partitions. In this case, the number n of partitions counts one continuous area surrounding each rack row.

  In a portion of each partition wall 24 adjacent to one vertical partition wall 14a, a communication port 28 for eliminating a pressure difference between the two adjacent compartments is provided. The communication port 28 can be provided with a filter or a net for air purification. In addition, when the pressure difference between the adjacent compartments can be allowed, movable blades that rotate so as to enable the air flow in the opposite directions between the compartments can be attached to the communication port 28.

  A rack cooler 30 is disposed on the rear surface 16b of the rack 16 of each rack row (18a to 18d). Each of the coolers 30 has a rack heat exchanger 30a that faces the air discharge port 22b on the rear surface 16b and is spaced from the air exhaust port 22b, and a fan that is disposed between the heat exchanger and the rear surface 16b facing the heat exchanger. A ventilator 30b as means. As the rack heat exchanger, a heat exchanger such as a fin coil heat exchanger having a cooling coil can be appropriately employed. When the air exhaust device 30b is activated, the air taken into the rack 16 from the compartments 26a to 26e opened by the air inlets 22a of the racks 16 carries heat released from the electronic communication devices 20 in the racks. Then, it is directed from the air discharge port 22b to the corresponding heat exchanger 30a. The rack heat exchanger 30a is vertically divided into two parts (see FIG. 7). These heat exchangers 30a are sensible heat coolers and are controlled so as not to cause condensation.

  Each cooler 30 is connected to a cooling source mechanism 32. The cooling source mechanism 32 includes a cooling water source 34 such as a cooling tower, a cooling water heat storage tank or a refrigerator, and an intermediate heat exchanger 36 that receives cooling water from the cooling water source. In the example shown in FIG. 1, the intermediate heat exchanger 36 is provided corresponding to each cooler 30. In FIG. 1, the intermediate heat exchanger 36 other than the intermediate heat exchanger 36 for the first rack row 18 a, that is, the intermediate heat exchanger 36 for the rack rows 18 b to 18 d is omitted for simplification of the drawing.

  As shown in FIG. 2, each intermediate heat exchanger 36 has a primary cooling water pipe 40 for circulating the primary cooling water to and from the cooling water source 34 and a corresponding rack heat exchanger 30a. And a secondary cooling water pipe 42 for circulating the secondary cooling water. Of course, both water distribution pipes 40 and 42 are made of return pipes. Each of the water distribution pipes 40 and 42 is provided with a pump 44 for circulating each cooling water that is a heat medium.

  As this circulation pump 44, as shown in FIG. 3, a pair of pumps 44 connected in parallel to each other can be adopted. By adopting this pair of pumps 44, the reliability (redundancy) can be increased with respect to the circulation of each cooling water. The pump 44 is a barreled motor pump, for example.

  Each intermediate heat exchanger 36 performs heat exchange between the primary cooling water sent from the cooling water source 34 and the secondary cooling water sent from each rack heat exchanger 30a. By this heat exchange, the secondary cooling water that goes around each intermediate heat exchanger 36 and the rack heat exchanger 30a corresponding to the intermediate heat exchanger 36 effectively uses the heat released from the electronic communication device 20 by the rack heat exchanger. To absorb. Thereby, each rack 16 is cooled by the corresponding cooler 30.

  Each of the coolers 30 is desirably set so as to have a cooling capacity sufficient to process waste heat from all the electronic communication devices 20 in the corresponding rack 16. For example, 15 ° C. water per 1 kW of rack is introduced into the upper and lower rack heat exchangers 30a at a water volume of 15 liters / minute.

  In order to make the temperature of the intake air taken into each rack 16 through the air intake port 22a substantially equal to the exhaust air discharged from the rack through the heat exchanger 30a, A temperature sensor (not shown) is provided at the outlet. Based on the measured value of the temperature sensor, the rotational speed of the exhaust fan 30b and the opening degree of a flow rate adjustment valve (not shown) provided in each heat exchanger 30a are controlled. That is, as the temperature detected by the temperature sensor rises, the rotational speed of the exhaust fan 30b is increased and the opening of the flow rate adjusting valve is increased.

  The racks 16 in each rack row (18a to 18d) have the front surface 16a provided with the respective air suction ports 22a directed toward the air intake port 12c, and the rear surface 16b provided with the air discharge ports 22b directed to the exhaust port 12d. It is arranged in alignment toward the side of the. The air flow discharged downstream from the rack row (18a to 18d) is cooled to the same level as the upstream air temperature by the cooling action of the cooler 30 provided for each rack row (18a to 18d). Is done. The outside air treated air taken into the server room 12 from the air intake port 12c is adjusted to a temperature and humidity of, for example, 22 ° C. and 40 RH by an external air conditioner (not shown).

  When each cooler 30 of the air conditioning system 10 according to the present invention is activated, as shown by the black arrow 46 in FIG. 1, the air intake is directed from the first rack row 18a to the fifth rack row 18d. One direction of substantially uniform temperature distribution from the first compartment 26a where the opening 12c is opened as the most upstream to the fifth compartment 26e which is the most downstream from the first compartment 26a where the exhaust port 12d is opened. The air flow 46 is generated.

  Therefore, the racks 16 of each rack row (18a to 18d) are effectively cooled without causing unevenness between the rack rows (18a to 18d) due to the unidirectional air flow described above.

  The one-way air flow directed toward the most downstream fifth compartment 26e is caused by the operation of the return fan 48a provided in the air return path 48 that connects the fifth compartment 26e and the first compartment 26a. , A part thereof is returned to the first compartment 26a. Therefore, the one-way air flow 46 forms an air circulation around the compartment 26 (26a to 26e) and the air return path 48.

  As described above, since the exhaust fan 30b of the cooler 30 is controlled based on the measurement value of the temperature sensor, the operating status of the exhaust fan 30b varies depending on the thermal load of the corresponding rack 16. . Therefore, an atmospheric pressure difference may occur in the adjacent compartments 26 (26a to 26e) depending on the operating status of the exhaust fan 30b. Depending on the direction of the height difference, this atmospheric pressure difference may interfere with the smooth air flow 46 described above, and may cause a flow obstruction such as stagnation. The communication port 28 serves to eliminate a pressure difference that hinders the smooth air flow 46 such as the stay.

  In the air conditioning system 10 according to the present invention, all the racks 16 in each rack row (18a to 18d) can be appropriately cooled by the air flow 46 in the one direction. Accordingly, each rack 16 can be cooled without forming an air passage for rack cooling in the underfloor space 12f (see FIG. 7) between the floor surface 12a and the floor slab 12e (see FIG. 7). Since the cooling air passage is unnecessary, the height of the underfloor space 12f can be reduced. As a result, an increase in the height of the building 38 can be avoided.

  Further, since the cooling water source 34 of the cooling source mechanism 32 can be installed on the roof or basement of the building 38, the space of the building 38 can be used effectively, and intermediate heat provided corresponding to the cooler 30 can be used. The exchanger 36 has a simple configuration and is inexpensive. Further, the intermediate heat exchanger 36 can supply the respective cooling mediums required to the individual heat exchangers 30b according to the load, and can process each generated heat at the heat generation point, so that it is efficient without waste. Cooling becomes possible.

  Furthermore, the primary cooling water from the cooling water source 34 is not directly guided to the rack heat exchanger 30 a provided in each rack 16, and the secondary cooling water is exchanged with each corresponding intermediate heat exchanger 36. Is only circulated. Therefore, even if the primary cooling water pipe 40 between the cooling water source 34 and the intermediate heat exchanger 36 is damaged, a large amount of primary cooling water can be prevented from flowing into the server room 12. Even if the secondary cooling water pipe 42 is damaged, each secondary cooling water pipe 42 is piped independently and in parallel, so that a large amount of damage is caused to damage the electronic communication device 20 in the rack 16. The cooling water does not flow into the server room 12.

  The electronic communication device 20 in each rack 16 is provided with a ventilator 20a (see FIG. 7). However, the blower 20a of the electronic communication device 20 can be made unnecessary by the blowing function of the blower 30b of the cooler 30.

  For maintenance and management of the electronic communication devices 20 in the racks 16, although not shown in the drawings, open / close doors that allow workers to enter and exit the compartments 26 a to 26 e can be provided on the partition walls 24.

  Further, a circulating flow indicated by a white arrow 49 in FIG. 1 is applied to the cooler 30 of each rack 16 in the compartments 26b to 26e from which the unidirectional air flow 46 is discharged from each rack row (18a to 18d). Deflection means (not shown) such as deflection fins can be provided for the purpose.

  This deflection means is normally held in a position that does not impede the flow of the air flow 46 in one direction. However, when a failure occurs in the cooler and the temperature rises, the rack row (18a to 18d) including the rack 16 in which the failure has occurred and all the rack rows 18a of the first stage 18a are detected by detecting the temperature rise. The deflection means is operated to a position where the air flow 46 discharged from the rack row is converted into a deflection air flow 48.

  For example, when a failure occurs in the cooler 30 of the rack 16 located in the center of the first rack row 18a, all the deflection means provided in the rack 16 of the rack row 18a are operated to the operating position. In this case, a circulating flow 48 is generated in the compartment 26b by the operation of the deflection means provided in the first rack row 18a including the rack 16 in which the failure has occurred.

  Therefore, the waste heat from the rack 16 corresponding to the failure target cooler 30 does not go directly to the rack 16 located at the center of the second rack row 18b, and the other coolers of the first rack row 18a. In the state mixed with the air cooled by 30, the air is supplied to the central rack 16 of the second rack row 18 b.

  That is, it is supplied to the subsequent rack row (18a to 18d) while being mixed with the air cooled by the other coolers 30 of the rack row (18a to 18d) to be failed. Therefore, the reduction in the cooling effect due to the failure can be evenly distributed to the racks 16 in the subsequent rack row. Therefore, even if a failure occurs in some of the coolers 30, the rack to be failed in the rack row (18a to 18d) at the rear stage of the rack row (18a to 18d) including the cooler 30 in which the failure has occurred. The temperature of the electronic communication device 20 accommodated in the specific rack 16 corresponding to the rack immediately below is prevented from rising significantly.

  In the example described above, when the cooler 30 of the rack 16 located in the center of the first rack row 18a fails, the waste heat from the failed rack 16 is lost in the rack 16 located in the center of the second rack row 18b. Therefore, the air can be prevented from going directly to the rack 16 located in the center of the second rack row 18b, and the air whose temperature has been made uniform is supplied to each rack 16 of the second rack row 18b as the rear row. A substantially uniform cooling effect can be obtained in each rack 16 in each of the second and subsequent rack rows.

  As the deflection means, for example, a circulation fan (not shown) for generating the circulation flow 49 described above is provided between the rack rows 18, and the circulation fan can be operated when the cooler 30 fails. In addition, a bellows-shaped partition that performs a deflection action as described above is provided at a predetermined position on the ceiling of the server room 12, and when the cooler 30 is operating normally, the partition is kept in a rolled-up state, and when the cooler 30 fails (the above-mentioned When the air blower is also stopped), the partition corresponding to the rack adjacent to the failure location is lowered, and the circulation flow 49 can be generated by the deflection action of the partition.

  As shown in FIG. 4, a plurality of server rooms 12 can be arranged in two rows with a corridor 38a of a building 38 in between. Further, a machine room 38b in which the intermediate heat exchanger 36 for the air conditioning system 10 and the like are arranged outside the hallway 38a along the row of both server rooms 12 can be arranged.

  1 to 4, an example in which a one-way flow is formed in the longitudinal direction of the server room 12 has been described. Next, an example in which an air flow that circulates in the server room 12 will be described.

  As shown in FIG. 5, a partition wall 50 perpendicular to the rack rows (18a to 18d) can be formed in the center of the server room 12 along the vertical partition walls 14a and 14b. Both ends of the middle partition wall 50 facing the horizontal partition walls 14c and 14d are spaced from the corresponding horizontal partition walls 14c and 14d. By the partition wall 50, the second to fourth partition chambers 26b to 26d excluding the first partition chamber 26a and the fifth partition chamber 26e are divided to the left and right as viewed from the partition wall 50.

  In the example shown in FIG. 5, the rack rows (18 a to 18 d) are arranged in four rows on the left and right sides of the partition wall 50 as in the example shown in FIG. 1. However, in each row, three racks 16 are arranged with the partition walls 50 in between, with the front surfaces 16a and the rear surfaces 16b oriented in the same direction. Moreover, on one side of the partition wall 50, the racks 16 are aligned with the rear surface 16b facing the horizontal partition wall 14c, and on the other side of the partition wall 50, the racks 16 have their front surfaces 16a sideways. Align toward the partition wall 14c.

  Further, in the example shown in FIG. 5, a space where air is discharged from one rack row and a space where air is sucked into another rack row spaced apart from this rack row are two corresponding sides of the server room 12. Each of the horizontal partition walls 14c and 14d is shared. This shared space (26e) is provided with an outside air processing air intake 12c, and the other space (26a) is provided with an exhaust port 12d.

  The rack heat exchanger 30a of the cooler 30 in each rack row (18a to 18d) is omitted in FIG. 5 for simplification of the drawing, but is similar to the cooling source mechanism 32 shown in FIG. Secondary cooling water is supplied from the intermediate heat exchanger 36.

  In the example shown in FIG. 5, the operation of the cooler 30 causes the reaction to flow in the server room 12 through each rack 16 and the cooler 30 provided in each rack, as indicated by a black arrow 46. A one-way flow in the clockwise direction is generated. Each rack 16 is suitably cooled by this one-way air flow 46, as in the example shown in FIG.

  In the example of FIG. 5 described above, it can be considered that 8 (n) compartments are formed by a total of 8 (n) partitions along the circulation direction of the air flow 46.

  Since the circulated air flow 46 in one direction around the server room 12 circulates in the server room 12 in an endless state, the air return path 48 shown in FIG. Since the remaining cold air can be utilized in the server room 12 if the amount of outside air taken into the room is exhausted, the configuration of the air conditioning system 10 can be simplified. Can do.

  Further, in the example shown in FIG. 5, the communication port 28 a is arranged in a part of the partition wall 24 adjacent to the vertical partition wall 14 a, that is, the partition wall 24 on one side of the space partitioned by the intermediate partition wall 50. The communication port 28b is disposed on the other side of the space partitioned by the middle partition wall 50, that is, in the vicinity of the vertical partition wall 14b. These communication ports 28a and 28b can be provided with filters, nets or movable blades as described above.

  As described above, the present invention has been described along the example in which the coolers 30 are arranged corresponding to the racks 16. However, as shown in FIG. 6, for example, two coolers 30 are used to connect three racks 16. Can be cooled.

  In the example illustrated in FIG. 6, three rows of rack rows (18 a to 18 c) are adopted on both sides of the partition wall 50, and three racks 16 are arranged in the left and right rows. The second and third compartments 26 b and 26 c are divided into left and right by a partition wall 50.

  In the example of FIG. 6, as in the example shown in FIG. 5, three racks 16 are arranged with the partition walls 50 in between so that the directions of the front surface 16 a and the rear surface 16 b coincide with each other. Moreover, on one side of the partition wall 50, the racks 16 are aligned with the rear surface 16b facing the horizontal partition wall 14c, and on the other side of the partition wall 50, the racks 16 have their front surfaces 16a sideways. Align toward the partition wall 14c. However, in the example of FIG. 6, as described above, the two coolers 30 are arranged corresponding to the three racks 16.

  As shown in FIG. 7, each of the coolers 30 includes an exhaust fan 30 b arranged at a distance from the rear surface 16 b of the rack 16, and the exhaust fan and the rear surface as described with reference to FIGS. 1 and 5. And a rack heat exchanger 30a disposed between 16b. The cooler 30 does not have to be formed integrally with the heat exchanger 30a and the exhaust fan 30b, but can be configured separately, and a filter or a humidifier can be provided between the two as necessary. .

  Instead, as shown in FIG. 8, the rack heat exchanger of the cooler 30 is arranged between the upstream heat exchanger 30-1a close to 16b, and the upstream heat exchanger and the exhaust fan 30b. It is possible to adopt a two-stage configuration with the downstream heat exchanger 30-2a. In this case, for example, by flowing the secondary cooling water in order from the downstream heat exchanger 30-2a to the upstream heat exchanger 30-1a, the upstream heat exchanger 30-1a has a downstream heat exchanger. Cooling water having a temperature higher than that of the cooling water supplied to 30-2a can be supplied, whereby multistage effective cooling excellent in redundancy and reliability can be realized. In the example shown in FIG. 8, the air intake port 22 a and the air discharge port 22 b of the rack 16 are omitted for simplification of the drawing.

  Moreover, in the above-mentioned, the example which provides a filter, a net | network, or a movable blade in the communicating port 28 (28b, 28b) was shown. Further, when the increase in the rack load is handled only by the increase in the flow rate of the heat medium, and the air blowing means is operated even when the heat exchanger pipe is damaged, a check valve is provided at the communication port. It can function as a stop damper.

  The present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, the capacity of the cooler can be selected for each rack row in accordance with an increase in the amount of heat generated by the electronic communication device accommodated in each rack, and the flexibility and flexibility of replacement of the electronic communication device can be selected. An air conditioning system is provided. Moreover, although the air-conditioning system using water as a refrigerant | coolant was shown, refrigerant gas can be used.

It is a top view which shows the example of rack arrangement | positioning in the server room to which the air conditioning system which concerns on this invention was applied. It is the schematic of the intermediate heat exchanger of the air conditioning system shown in FIG. It is drawing similar to FIG. 2 which shows the other example of the intermediate heat exchanger of the air conditioning system shown in FIG. It is a top view of the building which shows the example of arrangement | positioning of the server room shown in FIG. FIG. 2 is a view similar to FIG. 1 showing another example of rack arrangement in the server room shown in FIG. 1. FIG. 6 is a view similar to FIG. 1 showing still another rack arrangement example of the server room shown in FIG. 1. It is a longitudinal cross-sectional view of the cooler for racks obtained along line VII-VII shown in FIG. It is drawing similar to FIG. 7 which shows the other example of the cooler for racks.

Explanation of symbols

10 Air conditioning system 12 Server room (room)
16 rack 16a front surface of rack 16b rear surface of rack 18 (18a to 18d) rack row 20 electronic communication device 22a air intake port 22b air discharge port 24 partition wall 26 (26a to 26e) partition chamber 28 (28a, 28b) check damper DESCRIPTION OF SYMBOLS 30 Cooler 30a Heat exchanger for racks 30b Exhaust device 32 Cooling source mechanism 34 Cooling water source 36 Intermediate heat exchanger 40 Primary cooling water piping 42 Secondary cooling water piping 46 One-way air flow 48 Air return path 50 Middle partition wall

Claims (10)

A plurality of racks each accommodating a plurality of electronic communication devices, each having an air inlet on one of the front and rear surfaces, and an air outlet on the other of the front and rear surfaces An air conditioning system for a room in which a plurality of racks provided are arranged in a row and the rows are arranged in a plurality of rows,
Arranged in the vicinity of the rack to face the air outlet or the air inlet of the rack to cool the air discharged from the air outlet of the rack or the intake air to the air inlet to the rack. And a cooling source mechanism for supplying a refrigerant to the heat exchanger, and the air flowing in the room through each rack forms a one-way flow. The racks are arranged so that the orientation of the one surface of the rack of the rack row is aligned for each row and the orientation of the one surface of the rack of the rack row spaced apart from each other is the same, The heat exchanger and the air blower cool the air passing through the heat exchanger so as to prevent an increase in temperature in the room due to waste heat from the rack.   A plurality of the heat exchangers are provided for each rack row, and the plurality of heat exchangers are cooling coils for cooling the intake air with a heat medium, respectively, and the blowing unit operates according to the load of the rack The air conditioning system according to claim 1, wherein the heat exchanger exhibits a processing capacity sufficient for processing all waste heat discharged from the corresponding rack row for each rack row.   The room is divided into (n + 1) compartments by n partitions that are parallel to each other, and the rack rows are arranged in n rows so that each of the rack rows forms a part of each partition. In addition, in the portion excluding the rack row of each partition, there is a communication port that allows an air flow from the compartment having a high pressure to the compartment having a lower pressure than the adjacent compartment. The air conditioning system according to claim 2 provided.   Positioned at the uppermost stream where the air inlet of the rack in the first row of racks opens from the (n + 1) th compartment located at the most downstream position where the air outlet of the rack of the nth row of racks opens. The air conditioning system according to claim 3, wherein an air return path to the first compartment is formed outside the room.   The air conditioning system according to claim 3, wherein each partition is provided with an open / close door that allows a person to enter and exit each compartment.   In the room, there is provided a partition wall that divides the room into left and right spaces at approximately the center of the room, and each of the rack rows is provided in each of the left and right spaces of the partition wall. The rack rows are arranged in n rows so as to form a part and the air flows in the left and right spaces are opposite to each other, and are adjacent to a portion of each partition excluding the rack rows. The air conditioning system according to claim 2, wherein a communication port that allows an air flow toward the compartment is provided.   The air-conditioning system according to claim 6, wherein the communication port allows generation of a circulating air flow around each compartment through the both ends of the partition wall.   The air conditioning system according to claim 6, wherein each partition is provided with an open / close door that allows a person to enter and exit each compartment.   In each of the rack rows, the exhaust air from the racks in the rack row corresponding to the heat exchanger or the air blowing unit that has caused the failure at the time of the failure of the heat exchanger or the air blowing unit is discharged in the partition chamber. The air conditioning system according to claim 1, further comprising air deflecting means for causing the exhaust air to circulate.   The heat exchanger is disposed outside the rack so as to face the air discharge port, and in relation to the heat exchanger, exhaust air from the air discharge port of the rack toward the heat exchanger. The air conditioning system according to claim 1, wherein an air exhaust device that promotes air is provided as the air blowing means.

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