JP5384400B2 - Double floor structure - Google Patents

Description

  The present invention relates to a double floor structure, and more particularly to a double floor structure in which a plenum chamber for conditioned air is formed between a floor surface component and a floor slab. .

  For manufacturing precision equipment, electrical / electronic equipment, IT equipment, medical equipment / equipment, medicines, biological samples, etc. for building rooms, such as semiconductors, liquid crystals, diodes, and other electronic devices Clean room (dust-free room), data center, IT equipment management facility or server room such as mobile phone base station, computer room or communication equipment room, clean room such as hospital, medical facility or research facility, advanced medical equipment room, concentration In the treatment room or operating room, relatively strict air conditioning conditions such as maintenance and management of high air cleanliness, processing of a large heat load, or strict temperature and humidity control, etc. It is required corresponding to the above.

  For example, as a clean room air conditioning system, a unidirectional flow type, a non-unidirectional flow type, or a combined type air conditioning system using both types is known, but a high degree of air cleanliness is required as an indoor environmental condition. In a clean room for electronic device manufacturing, there is a one-way air conditioning system that uses a downflow configuration in which clean air is blown evenly out of the air supply port on the ceiling surface and the clean air flowing down the room is sucked in from the suction port on the floor surface. Generally adopted.

  This type of air conditioning system is disclosed in, for example, Japanese Unexamined Patent Application Publication No. 2006-336381 (Patent Document 1), Japanese Unexamined Patent Application Publication No. 10-54585 (Patent Document 2), Japanese Unexamined Patent Application Publication No. 9-257289 (Patent Document 3), It is described in the 2001-263747 gazette (patent document 4). In this type of air conditioning system, the ceiling back space is configured as an air supply (supply side) plenum chamber, and the lower floor (lower floor) of the clean room is configured as a return air (return side) plenum chamber. Generally, a configuration that maintains high cleanliness over the entire clean room by allowing clean air to flow toward the floor is generally employed.

  11 (A) to 11 (C) are longitudinal sectional views conceptually and schematically showing the method of the air conditioning system described in Patent Documents 1 to 4, and the air conditioning system includes a clean room, a plenum chamber, a supply air supply, and the like. This is indicated by the relative positional relationship between the vertical gas shaft and the heat exchanger.

  11A to 11C, the clean room 101 includes a floor structure 110 having air permeability, a ceiling structure 109 including an FFU (fan filter unit), a vertical shaft 103, and the like. And a wall body 108 that defines a wall. A floor slab 107 such as a concrete slab that horizontally divides the facility with respect to the lower floor or the ground is disposed below the floor structure 110. Between the floor structure 110 and the floor slab 107, a return air plenum chamber 102 having a height at which an operator or the like can move is formed. The return air plenum chamber 102 also functions as a maintenance space in which manufacturing equipment and auxiliary equipment for building equipment can be arranged. In addition, in each figure of FIG. 11 (A)-FIG.11 (C), the flow of the airflow which circulates through an air-conditioning air circulation circuit is notionally shown by the arrow.

  FIG. 11A shows a method of an air conditioning system described in Patent Documents 1 to 3. In the air conditioning systems of Patent Documents 1 to 3, a heat exchanger 105 is interposed between the return air plenum chamber 102 and the vertical shaft 103 in the downstairs, and cooling air (cold air) is supplied to the vertical shaft 103 and the supply air plenum chamber 104. Is supplied into the clean room 101 via

  The air conditioning system shown in FIG. 11B has a configuration described in Patent Document 2, and the heat exchanger 105 is built in the air conditioner 106, and the air conditioner 106 is disposed in the return air plenum chamber 102. Is done.

  The air conditioning system shown in FIG. 11C has a configuration described in Patent Document 4, and includes a heat exchanger 105 interposed between the return air plenum chamber 102 and the vertical shaft 103 and an auxiliary An air cooling heat exchanger 125 is further interposed between the vertical shaft 103 and the supply air plenum chamber 104.

  That is, the air conditioning in the clean room is a one-way flow type air conditioning system in which the clean air flows down from the supply air plenum chamber in the ceiling portion to the lower return air plenum chamber and can function as a maintenance space. Is a large-volume space constituting the lower floor of a two-layer (second floor) structure.

  On the other hand, in a room that houses an IT device with a high sensible heat load such as a server or the like, a floor blowing type or an upflow type air conditioning method in which cooling air is blown upward from the floor surface is generally employed.

  For example, Japanese Unexamined Patent Application Publication No. 2009-140421 (Patent Document 5) and Japanese Unexamined Patent Application Publication No. 2006-208000 (Patent Document 6) describe an air conditioning system for a server room in a data center. A server (IT equipment) that generates a large amount of sensible heat is accommodated in the server room.

  12 (A) and 12 (B) are longitudinal sectional views conceptually and schematically showing the method of the air conditioning system described in Patent Documents 5 and 6. FIG. The air conditioning system is indicated by the relative positional relationship of the server room, the plenum chamber, the air conditioner, and the heat exchanger. In FIGS. 12A and 12B, the flow of the air flow circulating in the conditioned air circulation circuit is conceptually indicated by arrows.

  As shown in FIG. 12A, a server rack 100 accommodating a plurality of servers is arranged in a server room 111. The server room is defined by the ceiling 119, the floor structure 110 and the wall body 113. The floor structure 110 is of a double floor type such as a free access floor or a network floor, and an air supply (supply side) plenum chamber 112 is provided between a floor surface component 118 and a floor slab 117 such as a concrete slab. It has a formed configuration. The floor surface component 118 has an air supply port for blowing cooling air upward.

  In the air conditioning system shown in FIG. 12A, an air conditioner 116 including a heat exchanger (cooling coil) 115 for cooling the circulating air is disposed in the server room 111. The cooling air fed from the air conditioner 116 into the air supply plenum chamber 112 flows out into the server room 111 from the air supply port of the floor surface component 118.

  On the other hand, in the air conditioning system shown in FIG. 12B, a return air plenum chamber 114 is formed between the ceiling 119 and the floor structure 110 on the upper floor. The conditioned air heated by the heat exchange with the server 100 is cooled by the heat exchanger 115 of the air conditioner 116 and then blown out from the air supply port of the air conditioner 116 to the indoor space of the server room 111.

  That is, as an air conditioner for a room containing equipment with high sensible heat load, a floor blowing type or an upflow type air conditioning system in which cooling air is blown out from an air supply plenum chamber in a floor part is known. Is a double floor constituting a single floor structure. The space in the double floor is also used as wiring / piping space for electrical wiring, control wiring, communication wiring, heat medium piping, control piping, and the like. However, this space does not have a height that can function as a maintenance space.

  Such a conventional double floor structure is formed by a free access floor or a network floor, but it may be considered that this is formed by a reverse beam. For example, Japanese Patent Laid-Open No. 8-296284 (Patent Document 7) discloses an underfloor ventilation structure in which a double floor is formed of concrete-structured reverse beams, and a space in the double floor is used as a ventilation passage. Have been described.

JP 2006-336381 A Japanese Patent Laid-Open No. 10-54585 JP-A-9-257289 JP 2001-263747 A JP 2009-140421 A JP 2006-208000 Gazette JP-A-8-296284

  However, a conventional reinforced concrete structure, a steel reinforced concrete structure, or a reverse beam of a steel structure protrudes greatly into the double floor. For this reason, when the conventional reverse beam structure is applied to the air supply plenum chamber of the floor portion, the beam-shaped portion protruding into the chamber forms a wall body or a weir in the chamber that prevents or restricts the flow of the air supply air. In addition, a barrier that prevents or restricts the route of the piping / wiring is formed in the chamber.

  On the other hand, the conventional reverse beam structure is applied to the air supply plenum chamber of the floor, and the beam formation of the reverse beam is increased, and the height of the space in the double floor is expanded. It can also be considered to form a maintenance space in which workers and the like can move. However, even if such a structure can be adopted, the beam-shaped portion protruding into the chamber hinders or restricts the movement of an operator or the like, and the structural disadvantage associated with the increase in the weight of the beam is at most It is difficult to avoid.

  As another means, a conventional double floor structure such as a free-access floor is used, and the length of each column supporting the floor surface component is extended so that the distance between the floor surface component and the floor slab is increased. Enlarging, thereby ensuring a space in the double floor that can function as a maintenance space. However, even if such a configuration can be adopted, new measures to improve the support strength, support rigidity, stability, and the like of each column are required.

  Therefore, it can be suitably used as a floor structure of a room containing equipment with high sensible heat load, and workers and the like can move without disturbing the flow of supply air flow and wiring / piping routes by weirs, barriers, etc. It is desired to develop a double floor structure that includes a plenum chamber that also functions as a possible maintenance space, and that can effectively ensure the support strength, support rigidity, stability, and the like of the floor surface constituent material.

  The present invention has been made in view of such a problem, and the object of the present invention is that the flow of the air supply and the wiring / pipe route are not obstructed by the weir, the barrier, etc., and the worker can move. Another object of the present invention is to provide a double floor structure that includes a plenum chamber that can also function as a maintenance space, and that can effectively ensure the support strength, support rigidity, stability, and the like of the floor surface constituent material.

In order to achieve the above object, the present invention comprises a floor slab that divides a room horizontally from a lower floor or the ground, and a floor surface component that is disposed above the floor slab and forms a floor surface. In a double floor structure that forms a plenum chamber of conditioned air with a floor surface component,
While supporting the load of the floor surface component material by the upper chord material of the beam of the truss structure, and supporting the load of the floor slab by the lower chord material of the beam,
The height of the plenum chamber is set to a height corresponding to the beam formation of the beam, and the spaces on both sides of the beam are interconnected by an opening formed between the upper chord material and the lower chord material. A double floor structure is provided.

  According to the above configuration of the present invention, an inverted beam having a truss structure is employed as a beam for supporting the floor slab and the floor surface constituent material. Truss-structured beams can greatly increase beam formation without significantly increasing their own weight, and by supporting the floor surface component with upper chord material, the load on the floor surface component and the load on the floor slab Can be dispersed in the upper chord material and the lower chord material, and the support strength, support rigidity, stability, and the like of the floor surface component separated from the floor slab can be effectively ensured. In addition, openings that allow air flow, wiring / piping, movement of people, and the like are formed between members such as the upper chord member, the lower chord member, the diagonal member, and the bundle member of the truss beam having increased beam formation. Therefore, the double floor structure of the present invention in which the plenum chamber is formed in the floor structure by the reverse beam of the truss structure increases the height of the plenum chamber so that the plenum chamber functions as a maintenance space and wiring / piping space. It is a very advantageous and rational structure in securing the supporting rigidity, supporting strength, stability, etc. of the floor surface constituent material.

  Furthermore, according to the double floor structure of the present invention, since the plenum chamber is within the height range of the girder, the plenum chamber can be formed in a multi-layered structure without greatly increasing the floor height of each floor. It can be arranged on each floor.

  From another viewpoint, the present invention provides a building having a double floor structure having the above-described configuration.

  According to the present invention, it has a plenum chamber that functions as a maintenance space in which a worker can move without being interrupted by a weir, a barrier or the like in the flow of air supply, wiring or piping paths, and the floor configuration It is possible to provide a double floor structure that can effectively ensure the supporting strength, supporting rigidity, stability, and the like of the material.

FIG. 1 is a longitudinal sectional view in the inter-beam direction schematically showing a configuration of a data center including a floor structure according to a preferred embodiment of the present invention. FIG. 2 is a schematic longitudinal sectional view of the data center shown in FIG. FIG. 3 is a longitudinal sectional view conceptually and schematically showing the air conditioning system of the server room shown in FIGS. 1 and 2. 4 is a cross-sectional view taken along the line II of FIG. 5 is a cross-sectional view taken along the line II-II in FIG. FIG. 6 is a partial longitudinal sectional view of the server room showing the structure of the server room shown in FIGS. FIG. 7 is a cross-sectional view taken along the line III-III in FIG. 6, and shows a planar configuration of the server room as a whole and schematically. FIG. 8 is a cross-sectional view taken along line IV-IV in FIG. 6, and shows a plan view of the supply plenum chamber as a whole and schematically. It is a perspective view which shows the server room shown in FIGS. 6-8 in the state cut | disconnected along the direction (direction between beams) of a truss beam. It is a perspective view which shows the server room shown in FIGS. 6-8 in the state cut | disconnected along the direction (girder direction) orthogonal to a truss beam. FIG. 11 is a longitudinal sectional view conceptually and schematically showing a method of an air conditioning system in a conventional clean room. FIG. 12 is a longitudinal sectional view conceptually and schematically showing a method of an air conditioning system in a conventional server room.

  According to a preferred embodiment of the present invention, a plurality of truss beams are arranged at predetermined intervals in the direction of the spar of the chamber, and each section of the plenum chamber divided by each beam is provided between the upper chord member and the lower chord member. The formed truss beam openings interconnect to form a substantially single plenum chamber. On the other hand, the opening of the truss beam located at the outer periphery of the chamber is closed by the wall, thereby ensuring the independence of the plenum chamber of each chamber.

  According to another preferred embodiment of the present invention, the chambers are stacked one above the other, and the lower surface of the floor slab of each layer chamber constitutes the ceiling surface of the lower floor chamber. The room air heated by exchanging heat with high-load equipment or the like flows along the lower surface of the floor slab. According to such a configuration, the plenum chamber can be provided on each floor without greatly increasing the floor height of the building.

  Preferably, the dimension (S) between the floor surface component and the floor slab is preferably set in the range of 1.2 to 3.0 m, more preferably in the range of 1.5 to 2.5 m. Is done. Preferably, the total load of the equipment arranged on the floor of the room and the total load of the floor component and its base material are supported by the upper chord of the truss beam.

  In a preferred embodiment of the invention, a heat exchanger is placed in the plenum chamber. The heat exchanger has an airflow passage surface extending vertically between the floor surface component and the floor slab, and divides the space in the plenum chamber into a return air buffer chamber and a blower chamber. A vertical shaft for returning the return air of the chamber to the return air buffer chamber is provided, and a blower is disposed in the vertical shaft or in the return air buffer chamber. The circulating air that has passed through the heat exchanger under the supply pressure of the blower is supplied to the chamber through the blower chamber.

  Preferably, a partition that forms a silencing chamber between the blower chamber and the return air buffer chamber is formed by the silencer. The silencer effectively prevents noise from the blower from propagating to the server room.

  In a further preferred embodiment of the present invention, the air flow passing surfaces of the heat exchanger and the silencer are oriented in a direction intersecting or orthogonal to the inter-beam direction so as to blow the air supply air to the blow chamber in the inter-beam direction. The supplied airflow is blown into the blower chamber so as to flow in the longitudinal direction of the truss beams (direction between the beams).

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 and FIG. 2 are longitudinal sectional views in a beam direction and a girder direction schematically showing a configuration of a data center including a floor structure according to a preferred embodiment of the present invention. FIG. 3 is a longitudinal sectional view conceptually and schematically showing the configuration of the air conditioning system in each server room, and FIGS. 4 and 5 are sectional views taken along lines II and II-II in FIG. . 6 is a partial longitudinal sectional view of the server room showing the structure of the server room shown in FIGS. 3 to 5, and FIGS. 7 and 8 are sectional views taken along lines III-III and IV-IV in FIG. is there. 9 is a perspective view showing the server room shown in FIGS. 6 to 8 cut along the direction of the truss beams (inter-beam direction), and FIG. 10 is the server room shown in FIGS. It is a perspective view shown in the state where it cut along the direction (girder direction) orthogonal to a truss beam. 1-8, the arrow is for showing conceptually the flow of conditioned air.

  The data center shown in FIGS. 1 and 2 has server rooms 11 arranged on a plurality of floors or multiple floors. The server room 11 on each floor is horizontally divided by a floor slab 17 of the floor structure 10. The lower surface of the floor slab 17 on each floor constitutes the ceiling surface 19 of the server room 11 on the lower floor. The floor structure 10 has a floor surface component 18 that forms the floor surface of the server room 11. A server rack 1 accommodating a plurality of servers is arranged on the floor surface of the server room 11.

  In the data center of this example, the distance in the height direction of the upper surface of the floor slab 17 of each floor, that is, the floor height F is about 5.5 to 6 m, and the beam G of the truss beam 80 is about 2 m. . The dimension between the lower surface of the floor surface component 18 and the upper surface of the floor slab 17, that is, the effective height S of the air supply plenum chamber 20 is a dimension that can be moved relatively easily by an operator or the like (for example, about 1 .7 to 1.8 m).

  A plurality of truss beams 80 are arranged at predetermined intervals in the beam direction of the server room 11. The load of the floor slab 17 is supported by the lower chord member 82 of the truss beam 80. The load of the floor surface component 18 is supported by the upper chord material 81 of the truss beam 80. If desired, the total load load acting on the floor surface of the server room 11 and the total load of the floor surface component 18, the joists 61 and the small beams 62 may be supported by the upper chord material 81.

  Through the opening 8 formed between the upper chord member 81 and the lower chord member 82, the spaces on both sides of the truss beam 80 are in communication with each other, and each compartment forms a substantially single air supply plenum chamber 20. If desired, the opening of the truss beam 80 located on the outer periphery of the server room 10 is closed by a wall (not shown) to ensure the independence of the air supply plenum chamber 20 corresponding to each server room 10. You may do it.

  The server room 11 has an air conditioning system for cooling a server stored in the server rack 1 (shown by a broken line). The air conditioning system includes an air supply (supply side) plenum chamber 20 formed in the floor structure 10 of the server room 11.

  FIG. 3 is a longitudinal sectional view conceptually and schematically showing the configuration of the air conditioning system in the server room.

  The server room 11 is defined by the floor structure 10, the wall body 14, and the ceiling surface 19. The floor structure 10 includes a floor surface component 18 that forms the floor surface of the server room 11 and a floor slab 17 that divides the server room 11 horizontally with respect to the lower floor or the lower ground. The server room 11 has an air conditioning system for cooling a server stored in the server rack 1 (shown by a broken line). The air conditioning system includes a return air vertical shaft 13 partitioned from the indoor space of the server room 11 by the wall body 12 and the above-described air supply plenum chamber 20 formed in the floor structure 10 of the server room 11.

  The air supply plenum chamber 20 defined between the floor surface component 18 and the floor slab 17 is used as wiring / piping space for the electrical wiring, control wiring, communication wiring, heat medium piping, control piping, etc. of the server room 11. In addition to being used, it is used as a maintenance space for maintenance and management of these facilities as well as for repairs and modifications.

  A partition wall 30 that divides the supply air plenum chamber 20 into a blower chamber 21 and a return air buffer chamber 22 is formed by the heat exchanger 15 for cooling the circulating air. The heat exchanger 15 disposed in the air supply plenum chamber 20 is a finned tube heat exchanger having a substantially vertical airflow passage surface and having a single tube row. As desired, the partition wall 30 includes a shield 16 that closes a gap between the heat exchanger 15 and the floor surface component 18 or a gap between the heat exchanger 15 and the floor slab 17.

  A partition 40 is further formed in the air supply plenum chamber 20 by a silencer 41. The partition wall 40 forms a silencing chamber 23 between the blower chamber 21 and the return air buffer chamber 22. As desired, the partition wall 40 includes a shield 42 that closes a gap between the silencer 41 and the floor surface component 18 or a gap between the silencer 41 and the floor slab 17.

  As shown in FIG. 6, the heat exchanger 15 is disposed vertically between the beam 62 and the floor slab 17, and a drain pan 25 is disposed below the heat exchanger 15. The heat exchanger 15 has a vertical (vertical) airflow passage surface extending substantially over the entire area between the beam 62 and the floor slab 17. On the outer edge of the heat exchanger 15, a shielding material or an airtight treatment material (not shown) that closes the gap between the small beam 62 and the floor slab 17 is disposed as necessary. The heat exchanger 15 is connected to a chilled water circulation pipe 55 disposed in the vertical shaft 13.

  The silencer 41 is a cell-type silencer disposed between the small beam 62 and the floor slab 17, and the outer edge of the silencer 41 closes the gap between the small beam 62 and the floor slab 17. A shielding material or an airtight treatment material (not shown) is provided as necessary.

  A server rack 1 accommodating a plurality of servers is arranged on the floor surface in the server room 11. As shown in FIGS. 5 and 7, the server racks 1 are arranged in parallel at intervals, and between the server rack rows, the hot aisle H in which the exhaust surface side of the server racks 1 is opposed to each other, and the server rack 1 Cold aisles C with the air supply surface facing each other are alternately arranged. On the floor surface of the cold aisle C, an air supply port 60 for blowing the conditioned air of the air blowing chamber 21 upward is disposed. The air supply port 60 is formed by grating with an opening adjustment shutter disposed substantially continuously along the cold aisle C. If desired, a floor blowing unit equipped with a blower may be spot-arranged at the air supply port 60.

  As indicated by arrows in FIG. 5, the conditioned air blown into the cold aisle C flows out to the hot aisle H through the server storage area in the server rack 1. Each server rack 1 incorporates a blower (not shown) that promotes such airflow. As shown in FIG. 10, the shielding plate 2 that shields the cold aisle C from the indoor upper space is arranged so as to bridge the upper part of the adjacent server racks 1.

  As shown in FIGS. 3 to 5, a return air inlet 65 for sucking room air is disposed over the entire width of the wall body 12 at the upper portion of the wall body 12, and the conditioned air is provided on the floor surface of the vertical shaft 13. A variable air volume type blower 50 that circulates is disposed. A silencer 45 that silences the noise of the blower 50 is disposed on the vertical shaft 13 side of the return air port 65.

  As shown in FIG. 7, a large number of silencers 45 are aligned and arranged over substantially the entire width of the wall 12, and a large number of blowers 50 are aligned along the wall 14 of the vertical shaft 13. As shown in FIG. 3, the conditioned air flowing out to the hot aisle H flows along the ceiling surface 19 and flows into the vertical shaft 13 under the suction pressure of the blower 50 through the return air port 65 and the silencer 45. .

  As shown in FIG. 6, the return air buffer chamber 22 is partitioned from the vertical shaft 13 by the floor surface constituent material 18 of the vertical shaft 13, and the discharge port of the blower 50 is disposed at the opening of the floor surface constituent material 18. Open in the air buffer chamber 22.

  The return airflow sucked into the vertical shaft 13 under the suction pressure of the blower 50 passes through the heat exchanger 15 under the discharge pressure of the blower 50 and exchanges heat with the heat transfer tubes and heat transfer fins of the heat exchanger 15. After the temperature is lowered, it flows into the blower chamber 21 as cooling air (cold air).

  As shown in FIG. 8, a large number of heat exchangers 15 are arranged in a row in a direction orthogonal to the truss beam 80, and a large number of silencers 41 are arranged in a row in a direction orthogonal to the truss beam 80. The return air buffer chamber 22, the muffler chamber 23, and the blower chamber 21 can also be used as a maintenance passage through which an operator can move. As a moving means in the vertical direction (vertical direction), a vertical passage section 90 having a staircase or an elevator is disposed adjacent to the return air buffer chamber 22. An operator or the like who maintains and manages the air conditioning system can descend from the floor level of the server room 11 into the return air buffer chamber 22, the silencer chamber 23, and the blower chamber 21 by the longitudinal passage section 90.

  As shown in FIG. 8, a plurality of truss beams 80 constituting the floor structure 10 of the server room 11 are arranged at predetermined intervals in the girder direction. As shown in FIGS. 6, 9 and 10, a truss beam 80 composed of an upper chord member 81, a lower chord member 82, a diagonal member 83, and a bundle member 84 supports the floor slab 17 of a concrete structure by the lower chord member 82, and the floor structure. The member 18, the joist 61 and the small beam 62 are supported by the upper chord material 81. When a similar server room is arranged on the lower floor, the lower surface of the floor slab 17 can form the ceiling surface of the lower floor server room.

  As shown in FIG. 6, the upper chord member 81 and the lower chord member 82 are joined to a column 85 (FIG. 6) and are interconnected in the girder direction by small beams 62 and 63. The truss beam 80 extends substantially from the vicinity of the heat exchanger 15 over the entire length of the air supply plenum chamber 20, and the silencer chamber 23 and the blower chamber 21 are divided by the truss beam 80. As described above, the opening 8 of the truss beam 80 formed between the upper chord member 81, the lower chord member 82, the diagonal member 83, and the bundle member 84 communicates the chamber inner spaces divided by the truss beam 80 with each other. It does not substantially interfere with the movement of workers between the inner spaces, the flow of airflow, and wiring / piping, so that the blower chamber 21 functions as a substantially single space.

  As described above, the beam formation G of the truss beam 80 is about 2 m, and the dimension between the lower surface of the floor surface component 18 and the upper surface of the floor slab 17, that is, the effective height S of the air supply plenum chamber 20 is For example, it is about 1.8 m. Preferably, the air supply plenum chamber 20 has an effective height S of 1.5 m or more.

  In the server room 11 shown in FIG. 10, the floor structure 10 located below the server room 11 includes a truss beam 80 having three spans in the spar direction and two inner truss beams that divide the air supply plenum chamber 20. 80 interconnects the divided chamber internal spaces and allows the air supply plenum chamber 20 to function as a substantially single space.

  On the other hand, the two truss beams 80 located on the outer side in the girder direction are formed with wall bodies 87 that close the truss opening (opening 8). When server rooms having the same structure and air conditioning system as the server room 11 are located on both sides of the server room 11, the supply plenum chambers of these server rooms are separated from the supply plenum chamber 20 of the server room 11 by the partition wall 87. Isolated. Therefore, the air supply plenum chamber can be divided into server rooms, and the independence of the air supply plenum chamber of each server room can be ensured.

  The preferred embodiments and examples of the present invention have been described in detail above. However, the present invention is not limited to the above-described embodiments and examples, and is within the scope of the present invention described in the claims. It is needless to say that various changes or modifications can be made in the above, and such changes or modifications are also included in the scope of the present invention.

  For example, in the above embodiment, the air supply plenum chamber of each chamber is formed by a truss beam having three spans in the spar direction. Alternatively, the air supply plenum chamber of each chamber may be formed by truss beams having four spans or more in the spar direction.

  In the above embodiment, the ceiling surface of the server room on each floor is formed by the floor slab of the floor structure on the upper floor. May be formed under the floor slab.

  Furthermore, in the said Example, although the air_conditioning | cooling of the room by an air conditioning system was demonstrated, the air conditioning system may be provided with functions, such as heating, humidification, and air purification.

  Moreover, in the said Example, although the air blower is arrange | positioned in the vertical shaft, you may arrange | position an air blower in a return air buffer chamber.

  The double floor structure of the present invention can be suitably used as a floor structure of a room equipped with a high load air conditioning system for cooling a room containing a high load device that generates a large amount of sensible heat. In particular, the double floor structure of the present invention is a floor of a server room, a data center, an IT equipment management facility, a mobile phone base station, etc., in which a large number or large capacity of IT equipment, computers, communication equipment, etc. are accommodated. It can be preferably used as a structure. The double-floor structure of the present invention does not have a weir or a barrier that obstructs the flow of the air supply flow in the air supply plenum chamber or the wiring / piping path, and functions as a maintenance space where workers can move. Since it has a sufficient height to be obtained, and the support strength, support rigidity, stability and the like of the floor surface constituent material can be effectively ensured, its practical effect is remarkable.

1 Server rack 8 opening (truss opening)
DESCRIPTION OF SYMBOLS 10 Floor structure 11 Server room 12, 14 Wall 13 Vertical shaft 15 for return air Heat exchanger 17 Floor slab 18 Floor surface component 19 Ceiling surface 20 Supply plenum chamber 21 Air supply chamber 22 Return air buffer chamber 23 Silencer chamber 30 40, Bulkhead 41, 45 Silencer 60 Air supply port 61 joist 62, 63 Small beam 65 Return port 80 Truss beam 81 Upper chord material 82 Lower chord material 83 Diagonal material 84 Bundle material

Claims (9)

A floor slab that divides the room horizontally from the lower floor or the ground, and a floor surface component that is disposed on the upper side of the floor slab and forms a floor surface, and the conditioned air is placed between the floor slab and the floor surface component. In a double floor structure forming a plenum chamber,
The load of the floor surface component is supported by the upper chord material of the truss structure beam, and the load of the floor slab is supported by the lower chord material of the beam,
The height of the plenum chamber is set to a height corresponding to the beam formation of the beam, and the spaces on both sides of the beam are interconnected by an opening formed between the upper chord material and the lower chord material. A double floor structure characterized by that.   A plurality of the beams are arranged at predetermined intervals in the spar direction of the chamber, and the sections of the plenum chamber divided by the beams communicate with each other by an opening formed between the upper chord member and the lower chord member. The double floor structure of claim 1, forming a substantially single plenum chamber.   The double floor structure according to claim 1 or 2, wherein an opening of the beam located at an outer peripheral portion of the chamber is closed by a wall body.   The chambers are stacked one above the other, the lower surface of the floor slab of each layer room constitutes the ceiling surface of the lower floor chamber, and the indoor air of the chamber flows along the lower surface of the floor slab The double floor structure according to any one of claims 1 to 3.   The total load of the equipment arranged on the floor surface of the room and the total load of the floor surface constituent material and its base material are supported by the upper chord material. A double floor structure as described in 1.   A heat exchanger is disposed in the plenum chamber, and the heat exchanger has an airflow passage surface extending vertically between the floor surface component and the floor slab, and a space in the plenum chamber. The double-floor structure according to claim 1, wherein the double-floor structure is divided into a return air buffer chamber and a blower chamber.   The double floor structure according to claim 6, wherein a partition wall that forms a silencing chamber between the blower chamber and the return air buffer chamber is formed by a silencer.   The air flow passage surface of the heat exchanger is oriented in a direction crossing or orthogonal to the inter-beam direction so as to blow the supplied air flow to the air blowing chamber in the inter-beam direction, and the supplied air flow flows along the beam. The double floor structure according to claim 6 or 7, wherein the air is blown into a blower chamber.   A building having the double floor structure according to any one of claims 1 to 8.

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