JP5969165B2 - Air conditioning system for information processing equipment room - Google Patents

Description

  The present invention relates to an air conditioning system for an information processing equipment room.

  With the development of information processing technology, the amount of heat generated by information processing equipment has been increasing. Along with this, the processing amount of the air conditioning system for cooling the information processing equipment is also increasing, and the development of air conditioning technology capable of efficiently cooling the information processing equipment is being carried out. In order to efficiently cool an information processing device, it is known that preventing airflow from flowing from a hot aisle to a cold aisle is effective in improving air conditioning efficiency (for example, Non-Patent Documents 1 and 2). An air conditioning system or the like has been developed that prevents the flow of the airflow and permits only the flow from the cold aisle to the hot aisle (for example, Patent Document 1).

  Patent Document 2 discloses an air conditioner that appropriately controls the temperature of each local area by adjusting the opening of each air volume adjustment damper. Patent Document 3 discloses a blowout device that reliably attracts air around the blowout to prevent condensation.

Japanese Patent No. 3833515 JP-A-5-203193 Japanese Patent No. 3872009

"Air Conditioning Sanitation Engineering Handbook", 14th edition, volume 3, page 363 Jiro Fukuda, “Data Center Overview and Future Direction”, Air Conditioning and Sanitary Engineering, Vol. 84, No. 5, 371-375

  In a large-scale information processing facility such as a data center that houses a large number of information processing devices, the power consumed by the air conditioning system accounts for the largest proportion of the power consumed by the information processing devices. It leads to reduction of energy consumption of the entire information processing facility. In particular, the ratio of power required for air conveyance to the air conditioning power is large, and it is required to reduce the air supply to the server rack to a necessary and sufficient air volume.

  However, if the supply airflow to the server rack is insufficient, the warm exhaust exhausted from the server rack may circulate to the suction surface side of the server rack, causing the information processing equipment to become locally hot and hindering operation. is there. Therefore, in many information processing facilities, in order to prevent such warm air from flowing around, the air supply air volume is increased and the air supply temperature is lowered.

  However, when the air supply amount is excessive, the air conveyance power is wasted. In addition, if the supply air volume is excessive, the temperature of the air returning to the coil that cools the air will decrease, so that the refrigerators operate in a low-efficiency operation region with a low pressure cut or a low load close thereto. Become. The reduction in the efficiency of the refrigerators due to a decrease in the temperature returning to the cooling coil also occurs when the heat generation amount of the information processing device is smaller than the design specification or when there are many information processing devices that exhaust with a constant air volume.

  Therefore, when the temperature of the air returning to the cooling coil is low, a part of the hot aisle air through which the exhaust of the server rack passes is returned to the cold aisle through which the air for cooling the server rack passes. The supply of air to the rack is made necessary and sufficient, and this leads to suppression of air conditioning power consumed by the air conditioning fan and the refrigerator. However, in order to realize this, it is necessary to reduce the air conveyance power from the hot aisle to the cold aisle and to make the temperature of the air blown out to the cold aisle substantially uniform. This is because if the conveyance power is large, the energy saving effect is small, and if the temperature is not uniform, the server rack may locally overheat.

  Further, in some information processing devices, the air intake balance between the hot aisle and the cold aisle is not unique because the amount of the suction air is constant regardless of the internal temperature or varies depending on the internal temperature. Therefore, when excessive air is supplied to the cold aisle, the ventilation resistance of the outflow path is reduced so that the cold air flows from the cold aisle to the hot aisle quickly to prevent an increase in the pressure of the cold aisle. There is a need to.

  This application is made in view of these subjects, and makes it a subject to provide the air-conditioning system of the information processing equipment room which can suppress air-conditioning motive power, supplying air of air volume required and sufficient to a server rack. .

  In order to solve the above-described problems, according to the present invention, a blowout unit that sends cold air sent from an air conditioner to an information processing device attracts hot aisle air. Hot aisle air flows to the information processing device due to attraction by supply air and the differential pressure between the hot aisle and the cold aisle.

  Specifically, in the air conditioning system of the information processing equipment room in which the racks containing the information processing equipment are aligned, the air sucked from the hot aisle through which the exhaust of the information processing equipment passes is cooled, and the information processing equipment is An air conditioner that sends air to be cooled to the cold aisle, an air supply port through which the cold air sent from the air conditioner passes, and a suction port that is arranged around the air supply port and communicates with the hot aisle are provided. And a blowout unit that draws the air in the hot aisle from the suction port with the cold air that has passed through the air supply port, and sends the air-fuel mixture to the information processing device.

  The air conditioning power consumed in the air conditioning system is roughly divided into power for conveying air and power for adjusting the temperature of air. Here, the power for conveying the air is determined mainly by the rotational speed of the air conditioning fan, etc., and in order to save this, the minimum amount of cold air is distributed to the information processing equipment to be cooled. Air may be conveyed to the extent. In addition, the power for adjusting the temperature of air is mainly determined by the power of refrigerators. To reduce this, the minimum amount necessary for cooling the information processing equipment that is the cooling target is reduced. What is necessary is just to produce | generate cold heat in the operation area | region with the highest operating efficiency.

  In other words, in an air conditioning system whose energy efficiency is greatly influenced by these factors, it is important that the temperature and air volume of air flowing into the information processing device and the temperature of air flowing out of the information processing device are optimized. is there. In this regard, since the amount of heat generated in the information processing device depends on the amount of data to be processed, etc., the optimum temperature and air volume flowing into the information processing device and the optimum temperature of the air flowing out of the information processing device are unique. It is not determined by.

Therefore, in the present air conditioning system, the air outlet unit attracts hot aisle air with the cold air of the air conditioner. If configured in this way, if the air volume of the air conditioner is reduced, the air in the hot aisle is attracted by the cool air of the air conditioner, and the air exhausted from the information processing equipment in a low load state is used for cooling the information processing equipment. Will be recycled. Also, the differential pressure between the two aisles that occurs when the cold aisle pressure is lower than the hot aisle pressure increases the amount of hot aisle air that passes through the suction port, and the hot aisle air cools the information processing equipment. Will be recirculated for. Therefore, it is possible to reduce the air flow by reducing the air volume of the air conditioner while securing the air volume necessary for cooling the information processing device. In addition, if the air volume of the air conditioner is reduced, the temperature of the air returning to the air conditioner increases, so that the operating point of the equipment for temperature adjustment can be kept in a highly efficient operating area, and energy saving of the entire air conditioning system is achieved. be able to.

  Further, the hot aisle and the cold aisle are partitioned, and the air outlet unit attracts the air of the hot aisle that flows out from the suction port when the cold aisle has a negative pressure than the hot aisle. In addition, the air-fuel mixture whose temperature variation is within a predetermined allowable range may be sent to the information processing device. When the cold aisle has a negative pressure than the hot aisle, the amount of hot aisle passing through the suction port increases, and the hot aisle air is recirculated for cooling the information processing equipment. Therefore, it is possible to reduce the air flow by reducing the air volume of the air conditioner while securing the air volume necessary for cooling the information processing device. Here, the “within a predetermined allowable range” is an allowable range of variation in the temperature distribution of the air sent to the information processing device, and is set to a temperature range in which the operation of the information processing device can be compensated, for example.

  The air outlet unit is disposed on the upper side or the lower side of the cold aisle and isolates the cold aisle and the hot aisle inserted between the air outlet unit and the rack. The hot aisle air may be attracted from the suction port provided on the side of the air outlet unit provided on the hot aisle side than the shielding plate, and the air-fuel mixture may be blown out toward the cold aisle. Alternatively, it is arranged so as to cover the air intake surface of the rack, and the air supply port through which the cold air sent from the air conditioner via the cold aisle passes, and the upper side or the lower side of the rack The suction port communicating with the hot aisle via an air passage provided at least in any one of them, and the air of the hot aisle from the suction port by the cold air passing through the air supply port Attract, the mixture may be those sent to the information processing apparatus. If the air outlet unit is configured in this way, air from the air conditioner can be effectively flowed to the information processing device.

  The air conditioning system of the information processing equipment room reduces the air volume of the air conditioner when the temperature difference between the temperature of the air flowing into the information processing equipment and the temperature of the air flowing out decreases, and the temperature difference increases when the temperature difference increases. You may further provide the control unit which increases the air volume of an air conditioner.

  In this air conditioning system, if the temperature difference between the temperature of the air flowing into the information processing device and the temperature of the air flowing out is small, it is determined that the air volume is excessive and the air volume of the air conditioner is reduced. If the temperature difference is large, it is determined that the air volume is too small and the air volume of the air conditioner is increased. Thereby, the conveyance power and temperature control power of air are reduced to some extent.

  By the way, when the air sent from the air conditioner is blown out from a normal opening, only an appropriate result corresponding to the increase / decrease amount of the air volume can be obtained only by controlling the air volume of the air conditioner based on such a temperature difference. That is, when it is determined that the temperature difference is small and the air volume is excessive, simply reducing the air volume of the air conditioner can reduce the power required for air transportation and the power for temperature adjustment to some extent. In the case of refrigeration equipment in which the maximum efficiency point is set to an operation region where the load is high to some extent, it is not efficient to keep the operation in the operation region where the efficiency is low.

In this respect, in the present air conditioning system, since the air outlet unit attracts hot aisle air by the cold air of the air conditioner, the energy saving effect by the air volume control executed by the control unit is further enhanced. That is, if the air outlet is configured in this way, when the air volume of the air conditioner is small, the air in the hot aisle is attracted by the cool air of the air conditioner and is exhausted from the information processing device in the low load state. Are recirculated to cool the information processing equipment. As a result, the operating point of the devices that perform temperature control can be maintained in a highly efficient operating region.

  Also, if the air volume of the air conditioner is large, the hot aisle air is attracted to the air volume of the cool air sent from the air conditioner due to the pressure balance between the cold aisle and the hot aisle and the reduction of the induction efficiency in the air outlet unit. The amount will be relatively reduced. As a result, the amount of warm air exhausted from the information processing equipment is reduced, and as a result, the operating point of the equipment for temperature control can be set to a high-efficiency operating range without significantly increasing the air volume of the air conditioner. Can be kept in. That is, the air outlet unit increases the air volume of air recirculated from the hot aisle to the cold aisle while maintaining the uniformity of the temperature distribution of the air flowing into the information processing equipment when the information processing equipment is in a low load state. When the information processing device is in a high load state, the air volume of the recirculated air is reduced. Therefore, even if the increase / decrease amount of the air volume of the air conditioner executed by the control unit is reduced, the temperature difference between the temperature of the air flowing into the information processing device and the temperature of the flowing out air can be controlled appropriately. As a result, the air conditioning capacity of the entire system can be reduced, and the air conditioning power can be effectively suppressed while supplying a necessary and sufficient amount of air to the server rack.

  In addition, when the temperature of the air flowing into the information processing device reaches an upper limit set temperature determined from the viewpoint of protecting the information processing device, the control unit reduces the air volume of the air conditioner regardless of the temperature difference. You may increase. If the control unit performs such control, the air volume of the cool air sent from the air conditioner is not excessively suppressed, so that it does not deviate from the temperature range in which the information processing apparatus can operate.

  Further, the air outlet unit has a rectifying plate for accelerating the cool air that has passed through the air supply port, and draws air of the hot aisle from the suction port with the chilled air accelerated by the rectifying plate, so that the air-fuel mixture May be sent to the information processing device. When the cool air accelerated by the current plate passes, hot aisle air is effectively attracted from the suction port. As a result, the air in the hot aisle is recirculated for cooling the information processing equipment, so that the air volume of the air conditioner is reduced and air conveyance power is reduced while ensuring the air volume necessary for cooling the information processing equipment. It is possible to reduce.

  It is possible to provide an air conditioning system for an information processing equipment room capable of suppressing air conditioning power while supplying a necessary and sufficient amount of air to the server rack.

It is a block diagram of the data center which has arrange | positioned the air conditioning system which concerns on embodiment. It is a block diagram of the data center which has arrange | positioned the air conditioning system which concerns on embodiment (modification). Arrangement example of air outlet unit (extension arrangement). Arrangement example of air outlet unit (distributed arrangement). Arrangement example of air outlet unit (distributed arrangement). It is a control flow figure which a control unit performs. It is the graph which showed the relationship between the operating efficiency of a refrigerator, and load. It is the graph which showed the correlation with the ratio of the quantity of the air attracted from the hot aisle with respect to the air volume of an air conditioner, and the air quantity of an air conditioner. It is a block diagram of the blower outlet unit which concerns on a 1st modification. It is a block diagram of the blower outlet unit which concerns on a 2nd modification. It is a block diagram of the blower outlet unit which concerns on a 3rd modification. It is a block diagram of the blower outlet unit which concerns on a 4th modification. It is a block diagram of the air conditioning system to which the blower outlet unit which concerns on a 5th modification is applied. It is an enlarged view of the blower outlet unit which concerns on a 5th modification. It is a front view of the blower outlet unit concerning the 5th modification (circle). It is structural drawing of the blower outlet unit which concerns on a 5th modification. It is a front view of the blower outlet unit concerning the 5th modification (rectangle). It is the figure which showed the 1st modification of the server room to which the air conditioning system which concerns on embodiment is applied.

  FIG. 1A is a configuration diagram of a data center 2 in which the air conditioning system 1 according to the embodiment is installed. In the data center 2, as shown in FIG. 1A, a large number of racks 3 accommodating information processing devices such as servers and communication devices for performing various arithmetic processes and database management are arranged in a server room 4, and a rack row 5 Is forming. The server room 4 is also provided with an air conditioner 6 that generates cool air to be supplied to each rack 3.

  Each rack 3 is provided with a cooling fan 24 for cooling the information processing device, and is configured such that the front surface of the rack serves as an intake surface and the back surface serves as an exhaust surface. The cooling fan 24 of the information processing equipment in each rack 3 is controlled in rotational speed so as to change every moment according to the load state and suction temperature of the information processing equipment accommodated in the rack. It may be one that moves at a constant rotational speed. If there is a gap in the rack 3 or between adjacent racks 3 because the information processing device is not installed, the gap should be prevented with a panel or the like that prevents the warm air from flowing around. preferable.

In the data center 2, the directions of the intake surface and the exhaust surface of each rack 3 constituting one rack row 5 are aligned so that the cool air is efficiently supplied to each rack 3. In addition, as shown to FIG. 1A, this invention is materialized even if the other side which straddled the cold aisle C of the rack row | line | column 5 exists as free space. However, for example, a mode in which similar rack rows 5 are opposed to each other as shown in FIG. 15 described later, or a panel 26 arranged to face the intake surface of the rack rows 5 as shown in FIG. 1B and a partition plate 16 described later. If cold aisle C is separated (isolated) from hot aisle H, cold air can be used efficiently. Since each rack 3 is installed in this manner, a cold aisle C through which cool air flows is formed on the intake surface side of the rack 3, and hot air discharged from the rack 3 flows on the exhaust surface side of the rack 3. Aisle H is formed.

  The air conditioner 6 includes a cooling coil 7 and an electric fan 8, and cool water, brine, or refrigerant flowing from the refrigerator 23 passes through the cooling coil 7 to cool the air in the server room 4. The air conditioner 6 sucks and cools the air of the hot aisle H from an intake grill 9 provided near the ceiling of the server room 4, and cools the cold aisle through the air outlet unit 10 disposed on the upper part of the cold aisle C. Supply air to C. The air conditioner 6 may be one in which the cooling coil 7 and the electric fan 8 are housed in separate casings, and both are connected by a duct. In this case, the electric fan 8 may be provided in the middle of the duct on the upstream side of the cooling coil 7 or may be provided immediately before the air supply port 11, for example. The air conditioner 6 may be installed in the server room 4.

Here, the air outlet unit 10 includes an air supply port 11 provided in a duct or a chamber, a current plate 12 that narrows the flow path of the cold air blown from the air supply port 11 into a nozzle shape, and increases the speed. And a shielding plate 14 that forms a mixing chamber 13 that attracts and mixes the air of the hot aisle H with the cold air that has passed through the opening. The rectifying plate 12 and the shielding plate 14 prevent the warm air from entering the cold aisle C in a lump state. An air outlet 21 is formed in the shielding plate 14. A suction port 15 communicating with the hot aisle H is formed between the rectifying plate 12 and the shielding plate 14, and the cold air whose speed is increased by the rectifying plate 12 and increased in dynamic pressure passes through the mixing chamber 13. Thus, the air of the hot aisle H is attracted from the suction port 15 and mixed in the mixing chamber 13. The mixture of hot aisle H air that has been attracted and mixed in this way and the cold air from the air conditioner 6 is, for example, compared with a case where the air of the hot aisle H is sent to the cold aisle C by an air conditioning fan. Thus, since the temperature distribution is substantially uniform, there is no possibility of causing local overheating of the rack 3. The floor of the server room 4 has a double structure, or the rack 3 is installed on a stand or the like and is in a state of wearing clogs. When the H air is configured to flow, the air outlet unit 10 may be installed below the cold aisle C and the air-fuel mixture may be blown out upward. When the floor of the server room 4 has a double structure, the floor surfaces of the cold aisle C and the hot aisle H are made of a breathable member such as grating.

  The air outlet unit 10 may extend along the longitudinal direction of the passage forming the cold aisle C as shown in FIG. 2A, or the cold aisle C as shown in FIG. 2B and FIG. A plurality of groups may be arranged in a distributed manner along the longitudinal direction of the passages forming the. The air outlet unit 10 has ducts and chambers that are arranged along the rack row 5 to have the same length and guide the cold air from the air conditioner 6 to the air intake provided on the upper surface of the air outlet unit 10. There is a kind.

  Further, as shown in FIG. 1A, a partition plate is provided between the air outlet unit 10 and the upper end portion of the rack 3 to prevent warm air discharged from the exhaust surface of the rack 3 from flowing directly to the intake surface. 16 is provided. The partition plate 16 prevents warm air from flowing from the hot aisle H to the cold aisle C without the air outlet unit 10, and local overheating of the rack 3 is prevented.

  The electric fan 8 of the air conditioner 6 can change the rotation speed by adjusting the switching frequency of the inverter. The rotational speed of the electric fan 8 is adjusted by the control unit 17. Assuming that the heat generation amount of the information processing equipment accommodated in the rack 3 is constant, when the number of rotations of the electric fan 8 increases, the flow rate of air passing through the rack 3 increases, and the cold aisle C and hot aisle H The temperature difference between becomes smaller. Moreover, if the rotation speed of the electric fan 8 decreases, the flow velocity of the air passing through the rack 3 becomes slow, and the temperature difference between the cold aisle C and the hot aisle H increases. Therefore, the control unit 17 controls the air conditioner 6 as follows.

  The control flow executed by the control unit 17 is shown in FIG. The control unit 17 monitors the temperature TI of the cold aisle C and the temperature TO of the hot aisle H by the temperature sensor TIx provided in the cold aisle C and the temperature sensor TOx provided in the hot aisle H. If the temperature TI of the cold aisle C is less than the set value TIset (S101), the control unit 17 checks the temperature difference between the cold aisle C and the hot aisle H (S102). And if the temperature difference (DELTA) T is less than setting value (DELTA) Tset, the control unit 17 will reduce the switching frequency of an inverter and will reduce the air volume of the air conditioner 6 (S103). On the other hand, if the temperature TI of the cold aisle C is equal to or higher than the set value TIset or the temperature difference ΔT is equal to or higher than the set value ΔTset, the control unit 17 increases the air flow rate of the air conditioner 6 by increasing the switching frequency of the inverter (S104). The control unit 17 suppresses the power consumption of the electric fan 8 and increases the operating efficiency of the refrigerator 23 by repeating these series of processes.

For example, assume that the air conditioning system is designed such that the set value TIset is 35 ° C., the temperature TI during rated operation is 25 ° C., and the temperature TO is 40 ° C. Here, when the heat load of the information processing device is reduced to about one third, the temperature difference ΔT is about 15 ° C. to about 5 ° C., and the temperature TO is 30 ° C. However, when the control unit 17 executes the control flow, the air conditioner 17
Is reduced to about one third, and the operating state is adjusted so that the temperature TI is 35 ° C. and the temperature TO is 40 ° C.

  The set value TIset is the upper limit temperature of the cooling air that can be accepted by the information processing device accommodated in the rack 3, and is a value that is appropriately determined from the viewpoint of protecting the information processing device. The set value ΔTset is the upper limit of the temperature difference between the supply air and the exhaust air that can be accepted by the information processing device accommodated in the rack 3, and is a value determined from the viewpoint of increasing the operating efficiency of the refrigerator 23. Since the operating efficiency of the refrigerator 23 generally has the characteristics shown in the graph of FIG. 5, the air volume of the electric fan 8 is lowered so as to be kept in the operating region where the operating efficiency is high. It is necessary to raise the temperature of the refrigerant (cold water or brine) flowing into the refrigerator 23.

  Here, in the air outlet unit 10, since the air of the hot aisle H is mixed with the cold air sent from the air conditioner 6, the following phenomenon occurs when the rotational speed of the electric fan 8 increases or decreases. Arise. FIG. 6 shows the ratio (ratio) of the amount of air attracted from the hot aisle H to the air volume of the air conditioner 6 when the rotational speed of the fan built in the rack 3 is constant in the outlet unit 10. It is the graph which showed the correlation with the air volume of the air conditioner 6.

  When the air volume of the air conditioner 6 is small, the air of the hot aisle H is effectively attracted, so the ratio of the attracted volume to the air volume of the air conditioner 6 is high (near point A in FIG. 6). However, as the air volume of the air conditioner 6 increases, the amount of air attracted increases, but the attraction efficiency decreases, and the ratio of the attracted volume to the air volume of the air conditioner 6 decreases (near point B in FIG. 6). When the air volume of the air conditioner 6 further increases, there is no room in the mixing chamber 13 where the air in the hot aisle H can merge, and the change in the pressure balance between the cold aisle C and the hot aisle H is combined with the blowing. The air flow attracted from the hot aisle H at the outlet unit 10 stops (near the point C in FIG. 6). Then, when the pressure balance between the cold aisle C and the hot aisle H exceeds the attractive force due to the speed increase of the rectifying plate 12, the air eventually flows back through the suction port 15 (near point D in FIG. 6).

  The air conditioning system 1 according to the present embodiment is designed based on the characteristics of the outlet unit 10 as shown in FIG. 6, and the control unit 17 determines the air volume of the air conditioner 6 based on the temperature difference ΔT. By controlling the above, the following operation occurs.

  That is, in the air conditioning system 1, when the temperature difference ΔT is less than the set value ΔTset, the control unit 17 reduces the air volume of the air conditioner 6 to reduce the flow rate of the air passing through the rack 3 and the air outlet unit 10. The temperature difference ΔT can be efficiently expanded by a synergistic effect with the increase in the proportion of hot aisle H in the blown-out air. Moreover, since the temperature distribution of the air blown out from the outlet unit 10 is substantially uniform by the mixing chamber 13, the rack 3 is not locally heated.

  Further, when the temperature difference ΔT is equal to or larger than the set value ΔTset, the control unit 17 increases the air volume of the air conditioner 6, thereby increasing the flow velocity of the air passing through the rack 3 and hot occupying the air blown out from the outlet unit 10. The temperature difference ΔT can be efficiently reduced by a synergistic effect with the reduction in the air ratio of the isle H.

In other words, if it is desired to increase the operating efficiency of the refrigerator 23 by controlling the temperature difference ΔT to be the set value ΔTset, a general ordinary register or the like can be provided by providing the outlet unit 10. This means that the temperature difference ΔT can be controlled even if the increase / decrease width of the rotational speed of the electric fan 8 is small as compared with the case where the air outlet is configured. The fact that the temperature difference ΔT can be controlled even if the increase / decrease width of the rotational speed of the electric fan 8 is small means that high-efficiency operation can be performed in a wide band even if the increase / decrease width of the blowing capacity of the electric fan 8 is small. That is, the outlet unit 10
By providing, the facility capacity of the entire air conditioning system 1 can be reduced.

  Further, if the air outlet unit 10 is provided, the heat generation amount of the information processing equipment accommodated in the rack 3 is small, and the number of rotations of the fan built in the rack 3 becomes small or the air conditioner 6 When the air volume is excessive, it is possible to expect an effect that the cold aisle C is prevented from becoming an excessive pressure by causing the air to flow backward through the suction port 15 due to the fluctuation of the pressure balance between the cold aisle C and the hot aisle H. .

  The air conditioning system 1 may omit the control unit 17. In this case, the air volume of the air conditioner 6 is adjusted manually. Since the air conditioning system 1 attracts hot aisle H air through the air outlet unit 10, even if the control unit 17 is omitted, the air conditioning device 6 can secure the air volume necessary for cooling the information processing equipment. It is possible to reduce the air flow power by reducing the air volume. Further, by reducing the air volume of the air conditioner 6, the temperature of the air returning to the air conditioner 6 can be increased, the operating point of the refrigerator 23 can be kept in a highly efficient operating region, and energy saving of the entire system can be achieved. .

  The air outlet unit 10 of the air conditioning system 1 may be modified as follows. FIG. 7 is a configuration diagram of the outlet unit 10A according to the first modification. In the air outlet unit 10 </ b> A, a damper 19 as an air volume adjusting mechanism is provided on the air conditioner 6 side upstream of the rectifying plate 12. If the damper 19 is provided in the air outlet unit 10A, the air supply amount can be adjusted not only on the electric fan 8 side but also on the air outlet unit 10A side. Therefore, the temperature difference between the air flowing into and out of the rack 3 can be individually controlled for each rack. As a result, overheating of the specific rack 3 can be prevented, and the rotational speed of the electric fan 8 that circulates the air in the entire server room 4 can be further suppressed. If the wind direction may vary depending on the damper 19, a face 20 that aligns the wind direction may be provided. As the air volume adjusting mechanism, a shutter may be used instead of the damper.

  Moreover, the air outlet system 10 and 10A of the said air conditioning system 1 may make the baffle plate 12 into the punching board provided with many holes, or these laminated bodies. An air outlet unit 10B according to a second modification is shown in FIG. By making the rectifying plate 12B a punching plate having an aperture ratio of about 20%, for example, the air in the hot aisle H is surely attracted by the cold air from the air conditioner 6. In addition, the temperature distribution of the air-fuel mixture that blows out from the outlet unit 10B can be made more uniform. In order to make the temperature distribution uniform, it is also effective to provide the mixing chamber 13 with an impeller or a windmill that rotates with airflow.

  Further, in the air outlet system 10 or 10A of the air conditioning system 1, the flow straightening plate 12 that increases the speed by narrowing the flow path of the cold air blown from the air supply port 11 in a nozzle shape may be a simple flat punching plate. . An air outlet unit 10C according to a third modification is shown in FIG. Even if the current plate 12C is a flat punching plate and the air supply port 11 is covered with this plate, the air of the hot aisle H can be effectively attracted. That is, if the air supply port 11 is covered with a rectifying plate 12C configured by a punching plate provided with a large number of holes, the cold air sent from the air conditioner 6 passes through the large number of holes provided in the rectifying plate 12C. Since the speed is increased, the dynamic pressure increases, and the cold air blows out into the mixing chamber 13, so that the air of the hot aisle H in the suction port 15 is attracted.

The air outlet units 10, 10 </ b> A, 10 </ b> B, and 10 </ b> C of the air conditioning system 1 may further include a damper as an air volume adjusting mechanism at the suction port 15. FIG. 10 shows an air outlet unit 10D according to a fourth modification in which a damper 19D is provided in the air inlet 15 of the air outlet unit 10A. If the damper 19 </ b> D is provided in the suction port 15, the amount of air in the hot aisle H mixed with the cold air sent from the air conditioner 6 can be arbitrarily adjusted. Therefore, for example, when there is a variation in the allowable suction temperature of each rack 3 constituting the rack row 5, the damper 1
By adjusting the opening degree of 9D, it is possible to adjust the suction temperature to be relatively high within the range of the suction temperature that can be allowed by each rack 3. For this reason, the rotation speed of the electric fan 8 can be suppressed, and the operating efficiency of the refrigerator 23 can be kept high in the region.

  The air outlet unit may be configured as follows. FIG. 11A is a view showing an air conditioning system 1 to which an outlet unit 10E according to a fifth modification is applied, and FIG. 11B is an enlarged view of the outlet unit 10E. FIG. 12 is a perspective view of the outlet unit 10E, and FIG. 13 is an enlarged internal structure diagram of a part of the outlet unit 10E. The air outlet unit 10E according to the present modification is attached to the front surface of the rack 3 instead of the upper side of the cold aisle C. When the air outlet unit 10E attached to the front of the rack 3 is applied, the cold aisle C is separated (isolated) from the hot aisle H by a panel 26 as shown in FIG. The cool air blown out from the air outlet 27 flows into the cold aisle C and flows into the rack 3 from the air outlet unit 10E. The cold aisle C may be separated (isolated) from the hot aisle H with the two rack rows 5 facing each other. In the present modification, as shown in FIG. 11B, an air passage 25 that connects the hot aisle H and the suction port 15 </ b> E is provided in the upper and lower portions of the rack 3. The air outlet unit 10E includes a number of air supply ports 11E, rectifying plates 12E, mixing chambers 13E, and suction ports 15E similar to the air outlet unit 10 described above, and forms a number of air outlets 18. Since the air supply port 11E faces the cold aisle C, the cold air sent from the air conditioner 6 flows in. The cool air flowing in from the air supply port 11E is accelerated by the rectifying plate 12E, and attracts air from the suction port 15E formed around the mixing chamber 13E. Thereby, the effect | action similar to the blower outlet unit 10 mentioned above is exhibited. In this modification, since the speed increasing action by the rectifying plate 12E is small, the inflow amount of the air flowing into the mixing chamber 13E from the air passage 25 through the suction port 15E is due to the air accelerated by the rectifying plate 12E. The difference between hot aisle H and cold aisle C is more dominant than attraction. In this modification, the air of the hot aisle H flows through the air outlet 25 provided in the upper part and the lower part of the rack 3 in the outlet unit 10E. It has a structure, or the rack 3 is installed on a gantry or the like and is in a state of wearing clogs, so that the air of the hot aisle H can be circulated under the rack 3. In this case, the air of the hot aisle H that has passed through the lower side of the rack 3 may flow into the air outlet unit 10E.

  If it is the blower outlet unit 10E comprised in this way, since it is only attached to the intake surface of the rack 3, it can be easily added also to the existing air conditioning system. Moreover, since the same effect as the air outlet unit 10 described above is exhibited, if the rotation speed of the air conditioning fan of the existing air conditioning system is controlled by the control unit 17 according to the above embodiment, energy saving of the entire system can be realized. But the blower outlet unit 10D which concerns on this modification is applicable also not only to the existing air conditioning system but to the newly installed air conditioning system.

  In addition, although the blowing part 18 of the blower outlet unit 10E which concerns on this modification was circular in FIG. 12, it may be a rectangle as shown in FIG. 14, for example.

  By the way, the said air conditioning system 1 can also be applied to the server room 4A as shown in FIG. In this server room 4A, as shown in FIG. 15, the cold aisle C is surrounded by two rack rows 5, and the hot aisle H and the cold aisle C are partitioned completely.

When the air conditioning system 1 is applied to such a server room 4A, the air attraction at the outlet unit 10 is as follows. That is, when the air-conditioning system 1 does not completely separate the cold aisle C and the hot aisle H as in the server room 4 according to the embodiment, the air attracting action in the air outlet unit 10. The speed-up action of the rectifying plate 12 is dominant. On the other hand, when the cold aisle C and the hot aisle H are completely partitioned as in the server room 4A according to this modification, the air attracting action in the outlet unit 10 is as follows. In addition to the 12 speed increasing action, two factors, the fluctuation of the pressure balance between the cold aisle C and the hot aisle H, which fluctuate depending on the rotational speed of the fan built in the rack 3, become dominant. But the effect by applying the blower outlet unit 10 is substantially the same as the case where the air-conditioning system 1 is applied to the server room 4 in which the cold aisle C is not completely partitioned from the hot aisle H.

DESCRIPTION OF SYMBOLS 1 ... Air conditioning system 3 ... Rack 6 ... Air conditioner 10, 10A, 10B, 10C, 10D, 10E ... Outlet unit C ... Cold aisle H ... Hot aisle

Claims (4)

An information processing equipment room air conditioning system in which racks containing information processing equipment are aligned,
An air conditioner that cools the air sucked from the hot aisle through which the exhaust of the information processing device passes, and sends the air to the cold aisle through which the air that cools the information processing device passes;
An air supply port through which cool air sent from the air conditioner passes, and a suction port that is arranged around the air supply port and communicates with the hot aisle, and the suction by the cold air that has passed through the air supply port A blowout unit that attracts the air of the hot aisle from the mouth and sends the air-fuel mixture to the information processing device,
The air outlet unit is disposed on the upper side or the lower side of the cold aisle, and is a shielding plate that is inserted between the air outlet unit and the rack and isolates the cold aisle and the hot aisle. The air of the hot aisle is attracted from the suction port on the side surface of the air outlet unit provided on the hot aisle side, and the air-fuel mixture is blown out toward the cold aisle.
Air conditioning system for information processing equipment room. An information processing equipment room air conditioning system in which racks containing information processing equipment are aligned,
An air conditioner that cools the air sucked from the hot aisle through which the exhaust of the information processing device passes, and sends the air to the cold aisle through which the air that cools the information processing device passes;
An air supply port through which cool air sent from the air conditioner passes, and a suction port that is arranged around the air supply port and communicates with the hot aisle, and the suction by the cold air that has passed through the air supply port A blowout unit that attracts the air of the hot aisle from the mouth and sends the air-fuel mixture to the information processing device,
The air outlet unit is disposed so as to cover the air intake surface of the rack, and the air supply port through which the cold air sent from the air conditioner via the cold aisle passes, and the upper side or the lower side of the rack. A suction port that communicates with the hot aisle via an air passage provided on at least one of the sides, and cool air that has passed through the air supply port attracts the air of the hot aisle from the suction port. , Sending the mixture to the information processing device,
Air conditioning system for information processing equipment room. An information processing equipment room air conditioning system in which racks containing information processing equipment are aligned,
An air conditioner that cools the air sucked from the hot aisle through which the exhaust of the information processing device passes, and sends the air to the cold aisle through which the air that cools the information processing device passes;
An air supply port through which cool air sent from the air conditioner passes, and a suction port that is arranged around the air supply port and communicates with the hot aisle, and the suction by the cold air that has passed through the air supply port A blowout unit that attracts the air of the hot aisle from the mouth and sends the air-fuel mixture to the information processing device;
A control unit that reduces the air volume of the air conditioner when the temperature difference between the temperature of the air flowing into the information processing device and the temperature of the air flowing out decreases, and increases the air volume of the air conditioner when the temperature difference increases. ,
When the temperature of the air flowing into the information processing device reaches an upper limit set temperature determined from the viewpoint of protecting the information processing device, the control unit increases the air volume of the air conditioner regardless of the temperature difference.
Air conditioning system for information processing equipment room. The air outlet unit has a rectifying plate for accelerating the cool air that has passed through the air supply port, and draws the air in the hot aisle from the suction port with the cold air accelerated by the rectifying plate, Send to information processing equipment,
The air conditioning system for an information processing equipment room according to any one of claims 1 to 3 .

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