JP2011089716A - Air conditioning system and hood device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioning technique performing air-conditioning of a room in which a storage part storing heat generating equipment is arranged, suppressing transfer of exhaust heat from the heat generating equipment and adaptable for an existing room and for various types of storage parts. <P>SOLUTION: This air conditioning system performing air-conditioning of the room in which the storage part storing the heat generating equipment sucking cold air from one side and discharging exhaust heat from the other side is arranged includes: an air conditioner cooling air within the room including exhaust heat; a hood device which is attachable/detachable to/from the front part of the storage part located on the air suction side of the heat generating equipment and covers the front part of the storage part and in which cold air cooled by the air conditioner is made to flow; and a floor blowout port provided below the hood device and sending the cold air cooled by the air conditioner from the underfloor space of the room to the hood device. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an air conditioning system and a hood device technology.

  In recent years, in data centers in which racks loaded with IT (Information Technology) devices such as servers are installed, the amount of heat generated has increased due to the increase in heat generation of IT devices, and the power consumption of the data center has increased. One factor that increases power consumption is a heat problem caused by “circulation of exhaust heat” in which exhaust heat emitted from an IT device, for example, a server is recirculated to a suction port of the server. When “exhaust heat wraparound” occurs, the temperature at the suction port of the server rises. The server generally has a function of automatically shutting down for self-protection when the temperature of the suction port rises. When the temperature at the suction port of the server rises due to the "circulation of exhaust heat" Shut down automatically. FIG. 1 is an example of a configuration (cross-sectional view) of a conventional air conditioning system, and shows “circulation of exhaust heat”. If “exhaust heat wraparound” occurs and the temperature at the server inlet increases, it may seriously affect the IT system maintained by the servers in the data center. Therefore, in the operation of the data center, it is necessary to sufficiently arrange the air conditioning in the data center so as to suppress the “circulation of exhaust heat” and the temperature rise at the suction port of the server.

  In order to suppress “circulation of exhaust heat”, technologies such as a shielding plate method (capping method), a sealed rack and a cooling system in the rack have been proposed. The shielding plate method includes cold aisle capping and hot aisle capping. Cold aisle capping is a method of installing a shielding plate on the ceiling surface of a space (cold aisle) through which cool air from an air conditioner passes among spaces separated by a row of racks that accommodate IT equipment (for example, patents) References 1 and 2). Hot aisle capping is a method of installing a shielding plate on the ceiling surface of a space (hot aisle) through which exhaust heat from an IT device accommodated in a rack among spaces separated by a row of racks (for example, (See Patent Document 3). The closed rack is a system in which an air outlet is provided in the lower part of a closed rack different from a mesh rack that has been widespread in recent years, and conditioned air under the floor is circulated in the rack. As a technology related to the hermetic rack, there is a technology that provides an adjustment mechanism that adjusts the ventilation rate according to the heat generation amount of the IT equipment (see, for example, Patent Document 4). The in-rack cooling method is a method in which a cooling unit is arranged in a rack (see, for example, Patent Document 5).

Japanese Patent No. 3833515 JP 2009-79890 A JP 2006-64303 A Japanese Patent No. 3746572 JP 2006-162248 A

  In a room where a rack loaded with IT equipment is installed, there is a heat problem due to “waste heat wrapping” in which exhaust heat from the IT equipment, for example, the server is recirculated to the suction port of the server (see FIG. 1). . If “exhaust heat wraparound” occurs and the temperature at the inlet of the server rises, it may seriously affect the IT system maintained by the server in the room.

As a technique for suppressing “circulation of exhaust heat”, a shielding plate method (cold aisle capping and hot aisle capping), a sealed rack and a cooling system in the rack have been proposed. However, in the conventional cold aisle capping, it is necessary to cover the cold aisle in the row direction so that the cold aisle is in a pressurized state. For example, when a rack that hardly contains IT equipment is included, to keep the air tight It takes time and effort to install many blank panels. As shown in FIG. 2, the conventional rack arrangement pattern includes a pattern in which racks are aligned and a pattern in which racks are not aligned. However, the application of the conventional cold aisle capping is specific to the pattern in which the racks are aligned. Further, in the case of conventional cold aisle capping, when there is wiring near the rack of the cold aisle ceiling, it may be necessary to relocate the wiring for construction, and it may be impossible to apply to existing equipment.

  Further, in conventional hot aisle capping, it is required to use an air conditioner between racks. Further, when not using an air conditioner, a separate return air chamber is required to collect exhaust heat from the rack or return it to the ceiling chamber. However, since the space of the ceiling portion uses a lot of space as a conductor for communication wiring or the like, it is very difficult to install the return air chamber as a retrofit. In addition, the conventional hot aisle capping requires the racks to be aligned as in the conventional cold aisle capping described above. That is, the application of conventional hot aisle capping is specific to the pattern in which the racks are aligned.

  In addition, in the conventional sealed rack, it is necessary to select the size of the rack according to the specifications of the IT equipment accommodated in the rack. When the conventional sealed rack is used in an existing installation, the rack or server can be replaced. Necessary. That is, the conventional hermetic rack is difficult to apply to the existing rack. In addition, a method using a closed rack and a cooler in the rack has been proposed. However, when considering application to existing equipment, additional piping equipment can be added or a dedicated rack can be replaced to newly place a cooler. Necessary. Therefore, in practice, it is very difficult to apply to existing facilities.

  In view of the above problems, the present invention relates to an air conditioning technology for air conditioning a room in which a housing portion for housing a heat generating device is arranged, suppresses the wraparound of exhaust heat from the heat generating device, and can be applied to an existing room, And it makes it a subject to provide the technique applicable to a various accommodating part.

  In the present invention, in order to solve the above-described problem, a hood device that is detachably attached to the intake side of the accommodating portion that accommodates the heat generating device and covers the intake side of the accommodating portion and through which cool air flows is provided. And it decided to arrange | position the floor blower outlet which sends out cold air to the lower part of a hood apparatus.

Specifically, the present invention is an air conditioning system that performs air conditioning of a room in which a housing unit that houses a heat generating device that draws cold air from one side and exhausts exhaust heat from the other, the room including the exhaust heat. An air conditioner that cools the air inside, and a hood device that is detachable with respect to a front portion of the housing portion that is present on the intake side of the heat generating device, covering the front portion of the housing portion, A hood device through which cool air cooled by the air conditioner flows,
A floor outlet that is provided below the hood device and sends out the cool air cooled by the air conditioner from below the floor of the room to the hood device.

In the present invention, the hood device is detachable with respect to the front portion of the housing portion, and can be attached to the existing housing portion. The accommodating portion includes a rack that accommodates a heat generating device such as a server, and a general-purpose device called a main frame that is packaged in advance in a normal rack such as a server or a storage. That is, the air conditioning system according to the present invention is applicable to an existing air conditioning system that performs air conditioning of a room in which a housing unit that houses a heat generating device is arranged. Further, the hood device is configured to be attached to the front portion of the hood device so as to cover the front portion of the housing portion, and the hood device can be used regardless of the pattern in which the housing portions do not form a row or the size of the housing portion. It can be attached to the receiving part. In other words, the hood device can be attached to the accommodation portion regardless of whether the room in which the accommodation portion is disposed has a cold aisle or a hot aisle. That is, the air conditioning system according to the present invention can be applied to various housing units. Moreover, since cold air is directly sent into the inside of the hood device from a floor outlet provided below the hood device, the cold air can be efficiently fed into the heat generating device. Furthermore, since the front part of the accommodating portion is covered with the hood device, it is possible to suppress the exhaust heat exhausted from the heat generating device from flowing into the heat generating device. That is, according to the air conditioning system of the present invention, it is possible to suppress the “circulation of exhaust heat” from the heat generating device and improve the efficiency of supplying cold air.

  Here, the accommodating part accommodates IT equipment including a server, and the size and number are not particularly limited. The accommodating portion also includes a row-shaped accommodating portion to which a plurality of accommodating portions are connected. Moreover, it is preferable that the accommodating part is a mesh type that can take in cold air from the front part and exhaust it from the rear part that exists on the discharge side of the heat generating device.

  The air conditioner cools the air in the room including exhaust heat. In the air conditioning system according to the present invention, “circulation of exhaust heat” is suppressed as described above, a circulation system in which air is circulated efficiently is formed, and the air conditioner is provided in a part of this circulation system. In the circulation system, for example, a ceiling chamber that is provided on the ceiling of the room and guides air including exhaust heat exhausted from the room to the air conditioner, and is provided under the floor of the room and cool air cooled by the air conditioner is discharged from the floor An underfloor chamber leading to is included. The air conditioner is preferably provided outside the room.

  A hood apparatus covers the front part of an accommodating part. In other words, covering the front part of the housing part means that a closed space in which cool air flows is formed by surrounding the front part of the housing part and the front part of the housing part and the inner wall of the hood device. The hood device may be configured by a front wall portion facing the front portion of the housing portion, two front side walls and a ceiling portion that are connected to the front portion of the housing portion and the end portion of the front wall portion, and facing each other. it can. The ceiling part may curve the upper part of the front wall part, and the front wall part may also serve as the ceiling part. In order to suppress the “circulation of exhaust heat” and improve the supply efficiency of the cold air, it is preferable that the hood device has excellent airtightness. Therefore, the hood device may be configured to have a sealing part that is in close contact with the connected part at least one of the connecting part with the front part of the housing part and the connecting part with the floor of the room. Further, the hood device may be configured to have an inspection port for enabling the heat generating device to be visually recognized from the outside of the hood device, or for opening and closing the door of the housing portion from the outside of the hood device. Note that, for example, by configuring the hood device with a transparent member, the visibility is improved, and it is easy to check the heat generating device.

  Here, the hood device has a connection portion connected to a front portion of the housing portion, and at least one of the hood device and the front portion of the housing portion is provided in front of the hood device and the housing portion. It is possible to adopt a configuration in which a leakage suppression unit is provided that suppresses the leakage of cold air in the hood device when connected to the unit. The connecting portion is exemplified by a hook. When a hook is used as the connection part, it is preferable to provide a hook part for hooking the hook in the housing part. By configuring the connecting portion with a hook, the hood device can be attached and detached by a single worker in a short time, and the hood device can be attached and detached without using a tool. Therefore, in other words, the connecting portion has a configuration in which the hood device can be attached and detached by a single worker in a short time, or the hood device can be attached and detached without using a tool. A magnet and a hook-and-loop fastener are illustrated as another aspect of such a connection part. The leak suppression unit can be configured by an elastic member.

In addition, the hood device is connected to the housing portion so as to be openable and closable via a hinge portion provided at a front portion of the housing portion, and an upper portion of the housing portion and the hood device are disposed above the floor outlet. A shielded state that suppresses escape of the cold air by covering the top of the hood device when the hood device is opened, and a non-shielded state that is folded when the hood device is closed. It is good also as a structure which has a ceiling shielding part which has. According to the aspect which provides a hinge part, it becomes possible to open and close a hood apparatus like a door centering on a hinge part. When the hood device is connected to the front portion of the housing portion via the hinge portion as described above, when the hood device is opened, the upper portion of the hood device is opened and the cool air sent from the floor outlet is upward. There is concern about escaping from the opening. In the present invention, since the hood device has the ceiling shielding part, escape of cold air when the hood device is opened can be suppressed.

  Here, the air conditioning system according to the present invention is provided on the upper side inside the hood device, and detects an upper temperature inside the hood device, the inside of the hood device, and the upper side. A lower temperature detection unit that is provided below the temperature detection unit and detects a lower temperature inside the hood device, and the floor outlet is a temperature detected by the upper temperature detection unit And an air volume adjusting section that adjusts the air volume of the cool air sent to the hood device based on a temperature difference between the temperature detected by the lower temperature detecting section and the temperature detected by the lower temperature detecting section. By providing the air volume adjusting unit, energy efficiency can be increased. When the temperature difference inside the hood device is small, the cool air reaches the top and the air volume is sufficient, but when the temperature difference is large, it can be determined that the air volume of the cold air is insufficient. Further, by detecting the temperature inside the hood device, it is possible to quickly determine whether the air volume is excessive or insufficient. For example, when the upper temperature detection unit and the lower temperature detection unit are provided on the housing unit side, the load can be checked by measuring whether the cold air reaches the end of the hood (the supply side of the heat generating device). The supply of cold air according to the can be realized. As a result, it is possible to prevent the cold air from staying on the surface facing the air supply opening provided at the lower portion of the hood device and insufficient intake of air into the housing portion with high responsiveness.

  The air volume adjusting unit is exemplified by a shutter that shields the floor outlet by opening and closing the plate-like member. By providing the shutter, it is possible to prevent unnecessary cooling air from being supplied by shielding the floor outlet even when there is an accommodating portion in which the heat generating device is not accommodated. In addition, when there is a storage unit that may have a small amount of cool air compared to other storage units, the amount of cool air to be sent out can be reduced, and the air conveyance power applied to the air conditioner can be reduced. Further, the air volume adjustment unit may be a fan that adjusts the air volume of the cool air sent out by adjusting the rotation speed. By using a fan, the air conveyance power concerning an air conditioner can be reduced. Further, by using the fan, even if the air conditioner fails, it is possible to send out the cold air that exists under the floor for a certain period of time, and the redundancy as the air conditioning system can be improved. In addition, according to the aspect provided with the said temperature detection part, the air volume automatic adjustment based on the temperature detected by the temperature detection part is possible. However, in order to make the air conditioning system simpler, the air volume adjustment may be performed manually.

  Moreover, the air conditioning system which concerns on this invention WHEREIN: The said food | hood apparatus can be set as the structure which further has a function as a door provided in the front part of the said accommodating part. Since the hood device is configured to cover the front portion of the housing portion, the hood device can be used instead of the door provided at the front portion of the housing portion. In the case of newly installing a storage section, a storage section that does not have a door in advance can be used, and the number of parts of the storage section can be reduced.

  Further, in the air conditioning system according to the present invention, the hood device is formed of a bag-like member, provided in at least a part of a region in contact with the front portion of the housing portion, and a ventilation portion formed of a member through which the cold air passes, A non-venting part made of a member that does not allow the cold air to pass therethrough, and an inflated state in which cold air is sent from the floor outlet, and from the floor outlet It is good also as a structure which has a contracted state which contracts by cold air | blocking.

In the expanded state, the cool air sent from the floor outlet can be supplied efficiently. In the contracted state, for example, it can be folded, and for example, when removing and storing the hood device, convenience in transporting is improved. Further, the expanded state and the contracted state can be confirmed at a glance from the outside, and it is possible to easily determine whether or not the cool air is normally supplied to the housing portion.

  Here, this invention is good also as a hood apparatus used for the air conditioning system mentioned above. Specifically, the present invention is a hood device used in an air conditioning system that performs air conditioning of a room in which a housing unit that houses a heat generating device that sucks cold air from one side and exhausts exhaust heat from the other, It is detachable with respect to the front part of the housing part present on the intake side of the heat generating device, covers the front part of the housing part, and cools the air in the room including the exhaust heat inside the hood device. The cold air that is cooled by the air conditioner that flows and the cold air that flows inside the hood device is provided below the hood device, and the cold air cooled by the air conditioner is sent to the hood device from below the floor of the room It is cold air sent out from the blower outlet. Moreover, this invention can also be specified as an accommodating part to which the said hood apparatus was attached. Furthermore, the present invention may be an air conditioning method. The invention related to the air conditioning method also has the same functions and effects as the air conditioning system according to the present invention described above.

  According to the present invention, the present invention relates to an air conditioning technology for air conditioning a room in which a housing portion for housing a heat generating device is disposed, and can suppress application of exhaust heat from the heat generating device, can be applied to an existing room, and A technique applicable to the housing portion can be provided.

An example of the structure (sectional drawing) of the conventional air conditioning system is shown. The top view of the example of the installation example of the rack of the conventional air conditioning system, Comprising: The example with which several racks with the same magnitude | size are installed in row form is shown. The top view of the example which is an example of the installation example of the rack of the conventional air conditioning system, Comprising: The several rack from which a magnitude | size differs is shown. Sectional drawing of the structure of the air conditioning system which concerns on 1st embodiment is shown. The perspective view of the hood apparatus concerning a first embodiment is shown. The side view of the food apparatus concerning a first embodiment is shown. Sectional drawing of the hood apparatus which concerns on 2nd embodiment is shown. Sectional drawing of the hood apparatus which concerns on 3rd embodiment is shown. Sectional drawing of the hood apparatus which concerns on 4th embodiment is shown. Sectional drawing of the hood apparatus which concerns on 5th embodiment is shown. The perspective view of the state which open | released the hood apparatus which concerns on 6th embodiment is shown. The change process of the food apparatus which concerns on 7th embodiment is shown. Sectional drawing of the structure of the air conditioning system which concerns on 8th embodiment is shown. The top view of the structure of the air conditioning system which concerns on 8th embodiment is shown. The top view of the structure of the air conditioning system which concerns on the modification of 8th embodiment is shown. Sectional drawing of the hood apparatus which concerns on 9th embodiment is shown. The functional block diagram of the control part of the air conditioning system which concerns on 9th embodiment is shown. The control flow of the air volume adjustment by the control part which concerns on 9th embodiment is shown.

  Next, embodiments of the present invention will be described with reference to the drawings. In the following description, the case where the air conditioning system of the present invention is applied to a data center where a rack loaded with IT devices such as servers is installed will be described as an example.

[First embodiment]
<Configuration>
FIG. 4 shows a cross-sectional view of the configuration of the air conditioning system according to the first embodiment. As shown in FIG. 4, the air conditioning system 200 according to the first embodiment includes an air conditioner 1, an underfloor chamber 2, a floor outlet 3, an air volume adjustment device 4, a machine room 5, a rack 6, a hood device 7, and a ceiling suction port. 8. A ceiling chamber 9 is provided.

  The air conditioner 1 cools the air in the machine room 5 including exhaust heat exhausted from the server. In the air conditioning system 200 according to the first embodiment, the cold air sent out from the air conditioner 1 is taken into the air conditioner again through the underfloor chamber 2, the machine room 5, and the ceiling chamber 9. That is, a single circulation system is formed by the air conditioner 1, the underfloor chamber 2, the machine room 5, and the ceiling chamber 9, and the air conditioner 1 is provided in this circulation system and takes in air including exhaust heat flowing through the ceiling chamber 9. Then, after cooling, it is sent to the underfloor chamber 2. In the machine room 5, the air blown out from the floor outlet 3 passes through the hood device 7 and the rack 6 and flows from the ceiling inlet 8 to the ceiling chamber 9. In the first embodiment, the air conditioner 1 is provided outside the machine room 5. The air conditioner 1 is configured by a unit type air conditioner including a heat exchange coil in which fins are attached to a pipe through which cold water flows and an electric fan that sucks and sends out air. The cold water supplied to the air conditioner 1 is cold water cooled by a refrigerator (not shown), and is supplied by a cold water circulation system that circulates between the air conditioner 1 and the refrigerator. In addition, the refrigerator which supplies cold heat to the air conditioner 1 cools a condenser with the water of the cooling tower installed outdoors. In addition, the air conditioner 1 may comprise an electric fan and a coil as separate units as a fan unit and a coil unit, and may be connected by a duct as necessary.

  The underfloor chamber 2 is formed in an underfloor space of a double floor, and guides the cold air sent out from the air conditioner 1 to the floor outlet 3. The floor outlet 3 is provided directly below the hood device 7, and sends out the cool air guided through the underfloor chamber 2 toward the hood device 7. In 1st embodiment, the floor outlet 3 is comprised by opening the floor 51 of the machine room 5, and installing grating in an opening part.

  The air volume adjusting device 4 is provided below the floor outlet 3 and adjusts the air volume of the cool air sent to the hood device 7. The air volume adjusting device 4 can be configured by a shutter or a fan. The aspect of the air volume adjusting device 4 will be described in the second embodiment and the third embodiment.

  The machine room 5 includes a floor 51, a ceiling 52, and a wall 53, and has a space inside. In this space, that is, the machine room 5, a rack 6 (corresponding to a housing portion of the present invention) installed on the floor 51 and a hood device 7 connected to the rack 6 are installed. Although only one rack 6 is shown in FIG. 4, a plurality of racks can be installed in the machine room 5. The plurality of racks 6 may have different sizes. The hood device 7 according to the first embodiment is applicable to one rack as shown in FIG. 4 because the number and size of racks to be connected are not limited. An aspect in which a plurality of racks are installed in the machine room 5 will be described in an eighth embodiment.

  The ceiling suction port 8 sucks air from the machine room 5, that is, air including exhaust heat discharged from the server. The ceiling chamber 9 is formed in a space behind the ceiling 52 and guides air including exhaust heat sucked from the ceiling suction port 8 to the air conditioner 1.

  The rack 6 accommodates a server. In the first embodiment, the rack 6 accommodates a server, but can accommodate heat generating equipment (IT equipment) that draws in cold air from one side and exhausts exhaust heat from the other side. The rack 6 according to the first embodiment is a mesh type that can take in cold air from the front portion 61 and exhaust exhaust heat from the rear portion 62. The front portion 61 is a surface that takes in cold air, and is configured as a door that can be opened and closed in the first embodiment. The rear part 62 is a surface that exhausts exhaust heat. Unlike servers with cooling fans, if the heat generating equipment housed in the rack does not have a cooling fan, install a separate fan to encourage cooling air supply and exhaust heat exhaustion. May be.

  The hood device 7 is detachable from the front portion 61 of the rack 6 and covers the front portion 61 of the rack 6. The cold air cooled by the air conditioner 1 is supplied into the hood device 7 through the floor outlet 3. FIG. 5 shows a perspective view of the hood device 7 according to the first embodiment. FIG. 6 shows a side view of the hood device 7 according to the first embodiment. FIG. 5 shows a state where the hood device 7 is removed from the rack 6, and FIG. 6 shows a state where the hood device 7 is attached to the rack 6. The hood device 7 according to the first embodiment is connected to the front wall portion 71 facing the front portion 61 of the rack 6, the front portion 61 of the rack 6, and the end portions of the front wall portion 71, and two side walls facing each other. The unit 72 is configured. In 1st embodiment, the upper part of the floor outlet 3 is covered by the upper part of the front wall part 71 curving toward the rack 6 side. That is, the front wall portion 71 also has a function as a ceiling portion. The bottom of the hood device 7 is opened to receive the cold air from the floor outlet 3, and the front portion 61 side of the rack 6 is opened to send the cold air to the rack 6. In addition, it is good also as a structure which makes the upper part of the front wall part 71 flat shape without curving, and the hood apparatus 7 is provided with the ceiling part parallel to the floor 51 of the machine room 5 separately. Although the hood apparatus 7 can be comprised by soft bodies, such as a vinyl, it can also comprise not only a soft body but rigid bodies, such as a steel plate.

  The hood apparatus 7 of the first embodiment has a hook 73, and the hook 73 can be attached to and detached from the front portion 61 of the rack 6. Thereby, the attachment / detachment work of the hood apparatus 7 can be performed in a short time by one worker. Further, the hood device 7 can be attached and detached without using a tool. In the first embodiment, a total of eight hooks 73 are provided, two at the upper end of the front wall 71 and three at the side end of each side wall 72. Moreover, the hood apparatus 7 which concerns on 1st embodiment is provided with the side sealing part 74 closely_contact | adhered with the rack 6 in the upper end part of the front wall part 71, and the side edge part of each side wall part 72. As shown in FIG. A lower sealing portion 75 connected to the floor outlet 3 is provided at the lower end portion of the front wall portion 71 and the lower end portion of each side wall portion 72. Thereby, the airtightness of the hood device 7 is improved, and the inflow of air including the leakage of cold air from the hood device 7 and the exhaust heat from the machine room 5 into the hood device 7 is more effectively suppressed. Both the side sealing portion 74 and the lower sealing portion 75 can be formed of an elastic member such as rubber. In the first embodiment, the lower sealing portion 75 is formed in a bellows shape, and the length of the hood device 7 in the vertical direction can be adjusted. Note that the side sealing portion 74 may have a bellows shape like the lower sealing portion 75.

  The hood apparatus 7 according to the first embodiment further has an inspection port 76 in the front wall portion 71. By providing the inspection port 76, the door of the rack 6 can be opened and closed from the outside of the hood device 7. The color of the hood device 7 is not particularly limited. However, by configuring the hood device with a transparent member, the visibility is improved and the server can be easily checked. Further, the hood device 7 may be colored according to the temperature of the cold air flowing inside. Thereby, the temperature of the cold air flowing through the hood device 7 can be easily grasped from the outside.

<Effect>
According to the air conditioning system 200 according to the first embodiment described above, the hood device 7 is detachable from the front portion 61 of the rack 6 by the hook 73, and can be easily attached to, for example, an existing rack. It is. That is, the air conditioning system 200 according to the first embodiment is applicable to an existing air conditioning system that performs air conditioning of the machine room 5 in which the rack 6 is arranged. Moreover, the hood apparatus 7 is a structure attached to the front part 61 of the hood apparatus 7 so that the front part 61 of the rack 6 may be covered, and the pattern in which the racks 6 do not form a row as in the first embodiment, The hood device 7 can be attached to the rack 6 regardless of the size of the rack 6. In other words, the hood device 7 can be attached to the rack 6 regardless of whether the machine room 5 in which the rack 6 is disposed has a cold aisle or a hot aisle. That is, the air conditioning system 200 according to the first embodiment can be applied to various racks 6. Moreover, since cold air is directly sent into the inside of the hood apparatus 7 from the floor outlet 3 provided under the hood apparatus 7, cold air can be efficiently sent to a server. Further, since the front portion 61 of the rack 6 is covered by the hood device 7 and the hood device 7 has the side sealing portion 74 and the lower sealing portion 75 and has high sealing performance, the exhaust discharged from the server. It is possible to effectively suppress the heat from flowing in and the server from supplying the exhausted heat. That is, according to the air conditioning system 200 according to the first embodiment, it is possible to suppress the “circulation of exhaust heat” from the server and improve the efficiency of supplying cold air.

[Second Embodiment]
Next, a second embodiment will be described. In addition, about the structure similar to the structure already demonstrated, the description is abbreviate | omitted by attaching | subjecting the same code | symbol. Hereinafter, the same applies to other embodiments. FIG. 7 shows a cross-sectional view of the hood device 7 according to the second embodiment. The hood device 7 according to the second embodiment is applicable to the air conditioning system 200 according to the first embodiment, and employs a shutter 40 as the air volume adjusting device 4. The shutter 40 has a plate-like member 401 and a shaft member 402, and the plate-like member 401 can rotate around the shaft member 402. In the second embodiment, three such plate-like members 401 and shaft members 402 are provided as a pair. In FIG. 7, the plate-like member 401 and the shaft member 402 are provided in pairs, but this is an example, and the number is not limited. When all the plate-like members 401 are parallel (horizontal) to the floor, the blowing of cool air from the floor outlet 3 is blocked. On the other hand, when all the plate-like members 401 are orthogonal to the floor, the amount of cool air blown from the floor outlet 3 is maximized. The shutter 40 may be adjusted manually or automatically. In the case of automatic, a temperature sensor that detects the temperature in the vicinity of the rack 6 or in the machine room 5 is installed, and is electrically connected to a control unit having a CPU (Central Processing Unit) and a memory. The angle of the shutter 40 and the like can be adjusted based on the acquired temperature. A mode for automatically adjusting the shutter 40 will be described in more detail in the ninth embodiment. The shutter may be a slide type, for example.

  In the second embodiment, by adopting the shutter 40 as the air volume adjusting device 4, even when there is a rack 6 in which no server is accommodated, the floor air outlet 3 is shielded to provide unnecessary cold air supply. Can prevent. For example, in the case where there are a plurality of racks 6 and there is a rack 6 that requires a smaller amount of cool air than the other racks 6, the amount of cool air that is sent out can be reduced and the air conditioner 1 is applied. Air conveyance power can be reduced.

[Third embodiment]
Next, a third embodiment will be described. FIG. 8 shows a cross-sectional view of the hood device 7 according to the third embodiment. The hood device 7 according to the third embodiment is applicable to the air conditioning system 200 according to the first embodiment, and employs a fan 41 as the air volume adjusting device 4. The fan 41 adjusts the air volume of the cool air sent out by adjusting the rotation speed. The adjustment of the fan 41 may be manual or automatic. In the case of automatic, a temperature sensor that detects the temperature in the vicinity of the rack 6 or in the machine room 5 is installed, and is electrically connected to a control unit having a CPU and a memory. Thus, the rotational speed of the fan 41 can be adjusted. A mode for automatically adjusting the fan 41 will be described in more detail in the ninth embodiment.

  In 3rd embodiment, the air conveyance power concerning the air conditioner 1 can be reduced by employ | adopting the fan 41 as the air volume adjusting device 4. FIG. Further, by adopting the fan 41, even if the air conditioner 1 breaks down, it becomes possible to send out the cold air existing in the underfloor chamber 2 for a certain period of time, and the redundancy as the air conditioning system can be improved.

[Fourth embodiment]
Next, a fourth embodiment will be described. FIG. 9 shows a cross-sectional view of a hood device 7a according to the fourth embodiment. The hood apparatus 7a which concerns on 4th embodiment is applicable to the air conditioning system 200 which concerns on 1st embodiment. In 4th embodiment, the rack 6a is a structure which does not have a door in the front part 61a. In other words, the hood device 7a functions as a door of the rack 6a. In this case, the connection between the rack 6a and the hood device 7a may be performed by, for example, a hinge portion. Since the hood device 7 is configured to cover the front portion 61 of the rack 6, the hood device 7 can be used instead of the door provided on the front portion 61 a of the rack 6 a. When newly installing the rack 6a, the rack 6a which does not have a door previously can be used, and the number of parts of the rack 6a can be reduced.

[Fifth embodiment]
Next, a fifth embodiment will be described. FIG. 10 is a sectional view of a hood device 7b according to the fifth embodiment. The hood apparatus 7b which concerns on 5th embodiment is applicable to the air conditioning system 200 which concerns on 1st embodiment. In the fifth embodiment, as in the fourth embodiment, the rack 6a has a structure in which the front portion 61 does not have a door. That is, the hood device 7b has a function of a door of the rack 6a. In the fifth embodiment, the depth of the hood device 7b is designed so that the work can be performed inside the hood device 7b with the hood device 7b connected to the rack 6a. In this case, the depth of the hood apparatus 7b can be 600 to 900 mm, for example. In addition, you may make it provide a bellows-like length adjustment part in the side wall part 72b of the hood apparatus 7b. Thereby, the depth of the hood apparatus 7b can be changed at the time of work and non-work. Furthermore, in the fifth embodiment, two floor outlets 3 are provided in the depth direction in accordance with the depth of the hood device 7b. Thereby, it becomes possible to send out sufficient cold air into the hood device 7b.

[Sixth embodiment]
Next, a sixth embodiment will be described. FIG. 11: shows the perspective view of the state which open | released the hood apparatus 7c which concerns on 6th embodiment. The hood apparatus 7c according to the sixth embodiment is applicable to the air conditioning system 200 according to the first embodiment. In the sixth embodiment, the rack 6 includes a door as the front portion 61 as in the first embodiment. This door has a mesh structure. However, in the sixth embodiment, the hood device 7c is connected via the hinge portion 76 and can be opened and closed as a door with the hinge portion 76 as an axis. Moreover, in 6th embodiment, when the door is open | released with the hood apparatus 7c in the state which the hood apparatus 7c sent out the cold air from the floor blower outlet 3, the ceiling which prevents the raise of the cold air from the floor blower outlet 3 is prevented. A shielding part 77 is provided. The ceiling shielding part 77 has a plurality of folds and is configured to spread so as to cover the upper side of the floor outlet 3 when the hood device 7c is opened. In other words, the ceiling shielding part 77 has a fan-like configuration. Thereby, the maintenance etc. of the inside of the rack 6 can be performed in the state which controlled the blow-off of the cold air sent out from the floor blower outlet 3 even in the state which opened the hood apparatus 7c and the door.

[Seventh embodiment]
Next, a seventh embodiment will be described. FIG. 12 shows a changing process of the hood device 7d according to the seventh embodiment. The left figure of FIG. 12 shows the state (the state in the middle of shrinkage | contraction) the hood apparatus 7d which concerns on 7th embodiment, and the right figure of FIG. 12 shows the state which the hood apparatus 7d which concerns on 7th embodiment expanded. Show. The hood apparatus 7d according to the seventh embodiment is applicable to the air conditioning system 200 according to the first embodiment.

In 7th embodiment, the hood apparatus 7d is comprised by the bag-shaped member, and the expansion state which expands when cold air is sent from the floor blower outlet 3, and the cold air from the floor blower outlet 3 are interrupted | blocked. A contraction state that contracts. The hood device 7d according to the seventh embodiment includes a ventilation portion 7d1 through which cold air passes in a region in contact with the front portion 61 of the rack 6, and the other region is configured as a non-venting portion 7d2 through which cold air does not pass. ing. The ventilation part 7d1 can be made of a breathable material such as a nonwoven fabric. As the material for the nonwoven fabric, for example, a hepa cloth material (breathable material in which the nonwoven fabric is sandwiched between vinyl sheets having a high aperture ratio) used for a mask or the like can be used. The non-venting part 7d2 can be made of a non-breathable material such as vinyl.

  According to the seventh embodiment, cold air sent from the floor outlet 3 can be efficiently supplied in the expanded state. In the contracted state, for example, it is possible to fold, and for example, when removing and storing the hood device 7d, convenience in transporting is improved. Further, the expanded state and the contracted state can be confirmed at a glance from the outside, and it is possible to easily determine whether or not cold air is normally supplied to the rack 6.

[Eighth embodiment]
Next, an eighth embodiment will be described. In the eighth embodiment, unlike the first embodiment, a mode in which a plurality of racks are installed in the machine room 5 will be described. FIG. 13 is a cross-sectional view of the configuration of the air conditioning system 201 according to the eighth embodiment, and FIG. 14 is a plan view of the configuration of the air conditioning system 201 according to the eighth embodiment. As shown in FIGS. 13 and 14, in the air conditioning system 201 according to the eighth embodiment, a plurality of racks 6 having the same size are installed in a row in the machine room 5. Further, the row rack group 60 and the row rack group 60 are installed so as to face each other. What is necessary is just to comprise the structure of the hood apparatus 7 similarly to 1st embodiment fundamentally. Therefore, the hood device 7 may be individually installed for all the racks 6 constituting the row rack group 60. Further, the hood device 7 may be installed in a part of the racks 6 constituting the rack group 60. FIG. 14 shows an example in which the hood device 7 is individually installed for all the racks 6 constituting the rack group 60. Note that the width of the front wall 71 of the hood device 7 may be increased to cover all the racks 6 constituting the plurality of racks 6 and the rack group 60 together.

  Here, FIG. 15 shows a plan view of a configuration of an air conditioning system 202 according to a modification of the eighth embodiment. The modification of the eighth embodiment is applied to a rack installation example of the conventional air conditioning system shown in FIG. In the eighth embodiment, a plurality of racks 6 having the same size are installed in a row, but in a modified example, a plurality of racks 6 having different sizes are installed in the machine room 5. The configuration of the hood device 7 may be basically the same as that of the first embodiment. However, in the modification of the eighth embodiment, the depth of the hood device 7 is individually adjusted in order to use the existing floor outlet. That is, in the hood apparatus according to the present invention, the floor outlet and the hood apparatus are not necessarily adjacent to each other. In the modification of the eighth embodiment, the hood device 7 is individually installed for all the racks 6 constituting the rack groups 60a, 60b and the like. However, you may install the hood apparatus 7 in the one part rack 6 which comprises the rack groups 60a and 60b. Note that the width of the front wall 71 of the hood device 7 may be increased to cover all the racks 6 constituting the rack groups 60a and 60b.

  According to the air conditioning system 202 according to the eighth embodiment, the hood device 7 can be attached to the rack 6 regardless of the pattern in which the racks 6 do not form a row or the size of the racks 6. In other words, the hood device 7 can be attached to the rack 6 regardless of whether the machine room 5 in which the rack 6 is disposed has a cold aisle or a hot aisle.

[Ninth embodiment]
Next, a ninth embodiment will be described. The ninth embodiment relates to a method for adjusting the air volume of cool air in the air conditioning system according to the second and third embodiments already described. In the air conditioning system according to the ninth embodiment, two upper and lower temperature sensors are provided inside the hood device 7, and the amount of cool air sent to the hood device 7 based on the temperature difference obtained from the temperatures detected by these temperature sensors. Is controlled.

Here, FIG. 16 shows a cross-sectional view of the hood device according to the ninth embodiment. The air conditioning system according to the ninth embodiment includes a lower temperature sensor T1, an upper temperature sensor T2, and a control unit 410 in addition to the configuration of the second embodiment. The lower temperature sensor T1 is connected to the lower side of the front portion 61 of the rack 6 and detects the lower temperature T1 inside the hood device 7. The upper temperature sensor T <b> 2 is connected to the upper side of the front portion 61 of the rack 6 and detects the temperature of the upper side inside the hood device 7. When the amount of cool air supplied to the hood device 7 is sufficient with respect to the amount of air sucked into the rack 6, the temperature difference between the temperature T1 and the temperature T2 becomes small. On the other hand, when the air volume of the cool air supplied to the hood device 7 is insufficient, the cool air for cooling the server that generates heat is insufficient, and heat pool is generated in the hood device 7. As a result, the upper temperature T2 in the hood device 7 becomes higher than the lower temperature T1 in the hood device 7, and the temperature difference between the temperature T1 and the temperature T2 increases. In FIG. 16, the lower temperature sensor T1 and the upper temperature sensor T2 are attached to the front portion 61 of the rack 6, but the installation position is not particularly limited. The lower temperature sensor T1 and the upper temperature sensor T2 may be connected to the hood device 7.

The control unit 410 is electrically connected to the lower temperature sensor T1, the upper temperature sensor T2, and the air volume adjustment device 4 (shutter 40), and is detected by the temperature T1 detected by the lower temperature sensor T1 and the upper temperature sensor T2. The angle of the biographical shutter 40 is adjusted on the basis of the temperature difference from the temperature T2 to be adjusted, and the amount of cool air sent into the hood device 7 is adjusted. The control unit 410 is realized by a computer having a CPU (Central Processing Unit) 411 and a memory 412 and a program executed on the computer (see FIG. 17). More specifically, the control unit 410 includes functional units including a temperature information acquisition unit 413, a determination unit 414, and an execution unit 415, and these functional units are executed by a computer, thereby adjusting the air volume of cool air. The

  Here, FIG. 18 shows a control flow of air volume adjustment by the control unit. In step S01, the temperature information acquisition unit 413 acquires the temperature T1 acquired by the lower temperature sensor T1 and the temperature T2 acquired by the upper temperature sensor T2 as temperature information. When the temperature T1 and the temperature T2 are acquired, the process proceeds to step S02.

  In step S02, the determination unit 414 determines whether or not the temperature difference between the temperature T2 and the temperature T1 is equal to or less than a predetermined threshold C (for example, 0.5 ° C.). In other words, the determination unit 414 determines whether or not the temperature difference T0 between the temperature T2 and the temperature T1 is equal to or less than a predetermined threshold C (for example, 0.5 ° C.), thereby supplying the cold air to the hood device 7. Determine the airflow shortage. If the temperature difference is less than or equal to the threshold value C, the process proceeds to step S03. On the other hand, if the temperature difference is not less than or equal to the threshold value C, that is, if the temperature difference exceeds the threshold value C, the process proceeds to step S04.

  In step S03, the execution unit 415 decreases the opening of the shutter 40. Thereby, the flow volume of the cold air supplied into the hood apparatus 7 is reduced. On the other hand, in step S04, the execution unit 415 increases the opening degree of the shutter 40. Thereby, the flow volume of the cold air supplied into the hood apparatus 7 is increased. When the temperature difference is small and the lower temperature T2 is higher than the predetermined temperature, the air volume of the cool air supplied from the air conditioner 1 is increased or the temperature of the cool air supplied from the air conditioner 1 is lowered. Such control may be performed. Moreover, in the said aspect, although the case where the air volume adjusting device 4 was comprised by the shutter 40 was demonstrated to the example, the air flow adjusting device 4 may be the fan 41 demonstrated in 3rd embodiment. In this case, in step S03, the execution unit 415 may reduce the rotational speed of the fan 41, and thereby the flow rate of the cold air supplied into the hood device 7 is reduced. Moreover, in step S04, the execution part 415 should just increase the rotation speed of the fan 41, and, thereby, the flow volume of the cold air supplied in the hood apparatus 7 is increased.

  The preferred embodiments of the present invention have been described above, but the air conditioning system according to the present invention is not limited to these, and can include combinations thereof as much as possible.

DESCRIPTION OF SYMBOLS 1 ... Air conditioner 2 ... Underfloor chamber 3 ... Floor outlet 4 ... Air volume adjustment apparatus 5 ... Machine room 6 ... Rack 7 ... Hood apparatus 8 ... Ceiling inlet 9 ... Ceiling chamber 200 ... Air conditioning system

Claims (9)

An air conditioning system that performs air conditioning of a room in which a housing portion that houses a heat generating device that draws in cold air from one side and exhausts exhaust heat from the other,
An air conditioner for cooling the air in the room including the exhaust heat;
A hood device detachably attached to a front portion of the housing portion present on the intake side of the heat generating device, the hood device covering the front portion of the housing portion, and the inside of the hood device being cooled by the air conditioner A hood device that flows,
An air conditioning system, comprising: a floor outlet provided below the hood device and for sending cool air cooled by the air conditioner from the under floor of the room to the hood device.   The hood device has a connecting portion connected to a front portion of the housing portion, and at least one of the hood device or the front portion of the housing portion includes the hood device and the front portion of the housing portion. The air-conditioning system according to claim 1, wherein a leakage suppression unit that suppresses leakage of cold air in the hood device when connected is provided.   The hood device is openably and closably connected to the accommodating portion via a hinge portion provided at a front portion of the accommodating portion. Above the floor outlet, an upper portion of the accommodating portion and an upper portion of the hood device are connected. And a shielded state that suppresses escape of the cold air by covering the top of the hood device when the hood device is opened, and a non-shielded state that is folded when the hood device is closed. The air conditioning system according to claim 1 or 2 which has a ceiling shielding part. An upper temperature detector provided on the upper side of the hood device for detecting an upper temperature inside the hood device; provided inside the hood device and below the upper temperature detector; A lower temperature detector for detecting the lower temperature inside the hood device,
The floor air outlet adjusts the air volume of the cool air sent to the hood device based on the temperature difference between the temperature detected by the upper temperature detector and the temperature detected by the lower temperature detector. The air conditioning system according to any one of claims 1 to 3, further comprising:   The air conditioning system according to any one of claims 1 to 4, wherein the hood device further has a function as a door provided at a front portion of the housing portion.   The hood device is formed of a bag-like member, provided in at least a part of a region in contact with the front portion of the storage unit, provided in a region other than the ventilation unit, a ventilation unit formed of a member through which the cold air passes, A non-ventilating portion made of a member through which the cold air does not pass, and an expansion state in which the cold air is expanded from the floor air outlet, and a contraction that is contracted when the cold air from the floor air outlet is blocked. The air conditioning system according to any one of claims 1 to 5, having a state. A hood device used in an air conditioning system for air conditioning a room in which a housing unit that houses a heat generating device that sucks cold air from one side and exhausts exhaust heat from the other,
It is detachable with respect to the front part of the housing part present on the intake side of the heat generating device, covers the front part of the housing part, and the inside of the hood device contains air in the room including the exhaust heat. Cool air cooled by the cooling air conditioner flows,
The cool air flowing inside the hood device is a hood device that is provided below the hood device and is sent out from a floor outlet through which the cool air cooled by the air conditioner is sent from the bottom of the room to the hood device.   The hood device according to claim 7, further comprising a function as a door provided at a front portion of the housing portion.   The hood device is formed of a bag-like member, provided in at least a part of a region in contact with the front portion of the storage unit, provided in a region other than the ventilation unit, a ventilation unit formed of a member through which the cold air passes, A non-ventilating portion made of a member through which the cold air does not pass, and an expansion state in which the cold air is expanded from the floor air outlet, and a contraction that is contracted when the cold air from the floor air outlet is blocked. The hood apparatus of Claim 7 or 8 which has a state.

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