JP6877234B2 - Underfloor airflow control structure and its construction method - Google Patents

Description

According to the present invention, in a room having a double floor structure having an underfloor ventilation passage such as a data center, a computer room, a communication machine room, etc., air conditioning cold air of an air conditioner is blown out from under the floor to cool an electronic device installed on the floor. Regarding the underfloor air conditioner control structure and its construction method.

In data centers, computer rooms, communication machine rooms, etc., equipment is mounted on racks, etc., and a double-floor structure that is convenient for installing a large number of such racks indoors and connecting the equipment with a large number of cables is adopted. The underfloor space between the upper floor and the floor slab of this double-floor structure is used as a cold air supply path, and conditioned cold air is blown from the air conditioner to the underfloor space to cool the electronic equipment. Then, the air blown out from the floor is heated by using cold heat for cooling the equipment and the like, and then sucked in from the ceiling surface and returned to the air conditioner as return air.

For example, Patent Document 1 discloses a skeleton heat storage air conditioning system that circulates heat storage air discharged from an air conditioner and diffused in a double underfloor air supply chamber on a floor slab to an air conditioner. According to the same gazette, during air-conditioning operation, the conditioned air discharged from the discharge port under the double floor at a considerable pressure is blown out from the outlets provided on the entire floor surface, and the conditioned air behind the ceiling passes through the air-conditioned room. It is returned to the return air port, but during heat storage operation, the return air port is switched to a return air duct dedicated to skeleton heat storage that is directly connected to the underfloor space, and is close to the discharge port that blows out from the air conditioner under the double floor and under the floor. The air-conditioning cold air is distributed evenly so that the heat storage air flows into the underfloor area guided by the guide and does not blow out onto the floor by the guide that guides the air-conditioning cold air away from the return air port installed in the space. I'm letting you.

Further, in Patent Document 2, in the double floor structure, an inverted V-shaped straightening vane extending downward in the underfloor ventilation passage is projected from the upper floor, and a part of the upper flow of air passing through the underfloor ventilation passage is provided. An example of guiding is shown. The guide has a width substantially equal to the width of the cooling device main body using the Peltier module as a heat source.

Japanese Unexamined Patent Publication No. 2002-235951 Japanese Patent No. 382176

Using the technology of Patent Document 1, a guide installed under the floor near the discharge port that blows conditioned air to the double underfloor air supply chamber is dedicated to the skeleton heat storage connected to one point under the floor in the room at the initial stage. Since the conditioned cold air is directed in a direction different from the return port of the return air duct, the conditioned cold air does not blow out on the floor and the airflow is distributed evenly under the floor. In the technique of Patent Document 1, when electronic devices are scattered in a room, air conditioning is performed by supplying appropriate air conditioning air from an outlet on the floor surface to the floor according to the indoor arrangement of the electronic devices to be air-conditioned. This is not possible, and a large amount of air-conditioning air must be discharged by discharging it at a considerable pressure, resulting in wasteful energy consumption.
Further, according to the technique of Patent Document 2, a part of the air passing through the underfloor ventilation passage by the inverted V-shaped straightening vane is taken into the cooling device main body with the flow direction facing upward. The floor blowing air conditioner blows out conditioned cold air at a high air volume and high speed, and according to Patent Document 2, the dynamic pressure of the underfloor air that hits the side surface of the inverted V-shaped rectifying plate is only changed in direction. Since it flows into the suction port of the exhaust fan in front, if it is close to the floor blowout air conditioner, the dynamic pressure of the high-speed underfloor air is large, so a large amount of air flows into the suction port of the exhaust fan, and if it is far away, the low-speed underfloor air Since the dynamic pressure is small, a small amount of air flows in, so the inverted V-shaped angle and size of the rectifying plate must be adjusted, and leveling is difficult.

An object of the present invention is to provide an underfloor airflow control structure and a construction method thereof in which the amount of airflow above the floor of a floor-blowing air conditioner is leveled and wasteful energy is reduced.

In order to achieve such an object, the underfloor air-conditioning structure of the present invention has a double-floor structure in which a floor post is erected at a lattice intersection marked out with respect to the floor slab and a floor surface is installed on the floor post. Air-conditioning cold air is horizontally supplied to the lower side of the floor surface by an air conditioner fan, and is arranged in a row along the air flow direction of the air-conditioning cold air that is horizontally supplied to the upper side of the floor surface and the lower side of the floor surface. In the underfloor air flow control structure that blows out from the floor surface with respect to the arranged housing to be cooled,
A floor in a space below the floor surface that sandwiches a row of housings to be cooled arranged in a row from both sides and sandwiches one or two or more floor posts in between. A pair of side guides consisting of a direct side guide and a facing side guide, which are fixed to the post facing each other and form a tubular space between the floor slab and the floor to allow air conditioning and cold air to flow along a row of housings. When,
One end is fixed to a floor post to which one of the pair of side guides is fixed, and the other end or in the middle of the pair of side guides is fixed to a floor post between the fixed floor posts. It has a barrier guide that is orthogonal to both of the pair of side guides and blocks the flow of air-conditioned cold air flowing in the length direction of the tubular space in a range halfway toward the other pair of side guides. ,
The floor surface includes a blowout panel having a grating surface or a perforated blowout port on the panel surface and a closed panel having no blowout port, and the floor surface forming the tubular space has one side surface thereof. The blowout panel is placed along the guide and the closure panel is placed along the other side guide.
A part of the air-conditioning airflow under the floor that flows horizontally near the pair of side guides is blocked by the barrier guides, and the dynamic pressure in the horizontal direction is converted into static pressure, resulting in a negative pressure on the floor. Without blowing out on the floor through the arranged blowout panel,
It is characterized in that an air flow of air-conditioned cold air flows between the pair of side guides and the ends of the barrier guides.

Further, in the construction method of the present invention, a floor post is erected at a grid intersection marked with ink on the floor slab, and a floor surface is installed on the floor post to form a double floor structure under the floor surface. The air conditioner fan supplies the air conditioner cold air horizontally, and the housings to be cooled are arranged in a row along the airflow direction of the air conditioner cold air that is horizontally supplied to the upper side of the floor surface and the lower side of the floor surface. On the other hand, in the construction method of the underfloor airflow control structure that blows out from the floor surface,
A floor in a space below the floor surface that sandwiches a row of housings to be cooled arranged in a row from both sides and sandwiches one or two or more floor posts in between. A cylinder in which a pair of side guides consisting of a directly below side guide and a facing side guide are fixed to the post so as to face each other, and air-conditioned cold air surrounded by the pair of side guides flows between the floor slab and the floor surface. Form a space,
One end of the barrier guide is fixed to a floor post to which one of the pair of side guides is fixed so as to block the flow of air-conditioned cold air flowing in the length direction of the tubular space, and the other end of the barrier guide or the other end of the barrier guide or In the middle of the process, the other pair of side guides is fixed to the floor post between the fixed floor posts so that the pair of side guides are installed orthogonal to both of the pair of side guides.
The floor surface includes a blowout panel having a grating surface or a perforated blowout port on the panel surface and a closed panel having no blowout port, and the floor surface forming the tubular space has one side surface thereof. The blowout panel is placed along the guide and the closure panel is placed along the other side guide.
A part of the air-conditioning airflow under the floor that flows horizontally near the pair of side guides is blocked by the barrier guide, and the dynamic pressure in the horizontal direction is converted into static pressure, which is a negative pressure on the floor. It is characterized in that the air is blown onto the floor through the arranged air blowing panel .

According to the present invention, the conditioned cold air from the air conditioner is flowed in the horizontal direction in the tubular space whose flow is defined by the pair of side guides, and is provided by the barrier guides provided in each of the tubular spaces. , The flow of air-conditioned cold air is obstructed and the flow is mainly changed in the horizontal direction, where part of the dynamic pressure is converted to static pressure. This converted static pressure is an omnidirectional pressure, and can be blown out as a flow from under the floor to above the floor, which is irrelevant to the mainstream direction of the conditioned air under the floor. For this reason, the conditioned cold air blown out from the air conditioner at high speed with a large amount of air is directed toward the underfloor room partition wall facing the air conditioner in line of sight when there is no airflow control structure. Can be blown out at a uniform rate. Since the wind speed blown out from under the floor can be made uniform, it is possible to optimize heat generation treatment and level the temperature of electronic devices.

FIG. 1 is a view showing a computer room having a double floor structure, FIG. 1A is an underfloor plan view, and FIG. 1B is a sectional view taken along line XX including above the floor. It is a figure which shows the indoor state on the floor, FIG. 2A is a plan view on the floor, and FIG. 2B is a perspective view. It is a figure which shows the distribution of the underfloor air-conditioning cold air when there is no airflow control structure in the underfloor space, FIG. 3A is a wind speed vector distribution, and FIG. 3B is a blow-up wind speed distribution from a floor panel. It is a figure which shows the tubular space by this Example, and the underfloor where the barrier guide is installed. It is a cross-sectional view of YY under the floor. 5 is a partially enlarged view, FIG. 6A is an enlarged view of a barrier guide in a tubular space p, FIG. 6B is an enlarged view of a barrier guide in a tubular space q, and FIG. 6C is a ZZ cross section in FIG. 6B. It is a figure which shows the distribution of the underfloor air-conditioning cold air in the underfloor space of FIG. 4, FIG. 7A is a wind speed vector distribution map, and FIG. 7B is a wind speed distribution map blown up from a floor panel.

FIG. 1 shows a conventional general underfloor space of a computer room 1 in a floor blowing air conditioning system having a double floor structure, FIG. 1A is an underfloor plan view, and FIG. 1B is an XX sectional view. The computer room 1 is a hot aisle-cold aisle system in which the server racks are arranged in rows to align the air suction and air discharge of the equipment in the rack and face each row to collect the cold air for suction and the warm air on the discharge side. It shows a one-way computer room that is arranged as a row but the rows are arranged in the forward direction instead of the room. FIG. 2A is a plan view on the floor, and FIG. 2B is a perspective view. The computer room 1 has a rectangular shape surrounded on all sides by walls 1a to 1d, but the shape varies. A large number of floor posts 3 are erected indoors from the floor slab 2 with each floor post 3 at the grid intersection (the intersection of the grid consisting of the top, bottom, left and right in the figure) that is marked on the surface of the floor slab 2. It constitutes a double-floor structure in which is installed. The floor surface is composed of a large number of square floor panels 4 having substantially the same shape as the lattice, and is supported by the floor post 3 at the apex position of the floor panel 4. Hereinafter, the floor panel 4 will proceed in a square shape, but one of the floor panels 4 may have an area of a plurality of grids. In the present specification, the upper side of the floor panel 4 is referred to as "above the floor", and the lower side of the floor panel 4 is referred to as "under the floor". As the floor panel 4, a blowout panel 4a having a grating surface or a perforated surface on the panel surface and a closing panel 4b without an outlet are used. Since the floor blowing air conditioner 5 (hereinafter referred to as the air conditioner 5) is heavy along the wall 1a of the computer room 1, one or more floor blowing air conditioners 5 are arranged on the floor slab 2 via the gantry 7 and below the floor panel 4 (hereinafter, the floor panel 4). Air-conditioned cold air is blown out from the discharge port 6a of the blowout elbow 6 in one direction (left-right direction in FIG. 1A) along one side of the grid with respect to the underfloor space between the floor slab 2. Depending on the size of the underfloor space, the blowout elbow 6 may have only a curved surface and a side surface extending downward from the right in FIG. 1B, and it is sufficient that the airflow direction from the fan deliberi on the lower surface of the air conditioner can be changed horizontally. The signal cable connecting the electronic devices The underfloor space where the power cable is laid is used as a supply path for the air-conditioned cold air, and the air-conditioned cold air blown out from the blowout panel 4a onto the floor cools the electronic devices in the computer room 1. Do it. The electronic devices are mounted in a plurality of rectangular parallelepiped housings 8, and each housing 8 is arranged in a row as shown in rows P to S in FIG. 2 so that maintenance by maintenance personnel can be facilitated. Have been placed. In this embodiment, an example of an electronic device having an air-cooled structure that sucks in outside air from the front of the housing 8 and exhausts it to the back is shown, and the blowout panel 4a is arranged in a row of the housing 8 on the front side of the housing 8. It is arranged along. The air in the room is sucked in from the return air port 9 (shown in FIG. 1B) installed on the ceiling surface, and returns to the floor blowout air conditioner 5. In FIGS. 1A and 2A, the shaded floor panel is the arrangement position of the blowout panel 4a, and the others are the arrangement positions of the closing panel 4b. The group of the housings 8 on the left floor in FIG. 2A shows, for example, the lower suction housing 8, and in this case, the blowout panel 4a is arranged at the lower part of the housing.

FIG. 3 shows the distribution of the underfloor air-conditioned cold air in the underfloor space of FIGS. 1 and 2, that is, the distribution of the underfloor air-conditioned cold air when there is no airflow control structure under the floor this time, and FIG. 3A shows the wind speed vector distribution. FIG. 3B is a wind speed distribution diagram showing the wind speed distribution from the floor panel when the entire area from the air conditioner 5 to the facing wall 1c in the cross section XX is assumed to be a blowout panel. In FIG. 3A, since the air conditioner 5 blows out the conditioned cold air horizontally at a high speed and with a large air volume, the conditioned cold air goes straight toward the wall 1c facing the discharge port 6a of the blowout elbow 6 at the lower part of the air conditioner. A large amount of conditioned cold air flows under the row (for example, P row) of the housing 8 arranged on the axis of the air flow center axis blown from the discharge port 6a of the blowout elbow 6 at the bottom of the air conditioner 5. The amount of air-conditioning cold air in the lower part of the row (for example, R row) of the housing 8 arranged between the central axes of the airflow blown from the discharge port 6a of the blowout elbow 6 in the lower part of the air conditioner 5 gradually spreads. Because there are few. The air-conditioned cold air that goes straight collides with the lower part of the floor of the facing wall 1c, loses its place, and the dynamic pressure in the horizontal direction is suddenly changed to static pressure, so the floor with the only opening that can release the pressure. Blow onto the floor through the surface. In FIG. 3B, this phenomenon is shown by the fact that the wind speed of the air-conditioned cold air blown out on the floor is maximized at a position close to the facing wall 1c. On the other hand, it has been observed that air flows in the opposite direction from above the floor to below the floor at a location mainly composed of a row of housings 8 near the air conditioner 5 and a passage between the air conditioner 5. This is because the air conditioner 5 blows out the conditioned cold air horizontally at a high speed and with a large air volume, so that a negative pressure is generated on the floor surface so as to be sucked downward. In this way, the direction and amount of wind velocity distribution in the vertical cross section change drastically depending on the distance from the air conditioner 5, so the arrangement of the blowout panel 4a is made into the calorific value of the electronic device mounted in the housing 8 in a plane. Even if it is laid according to the corresponding glazing area, it is difficult to control the amount of air-conditioned cold air that goes straight from the air conditioner 5 toward the opposite wall 1c to the amount of cold air blown out from the floor as intended. .. Further, under the floor, a wiring cable is laid omnidirectionally with the housing 8 as the connection center, which is one factor that makes it difficult to guide the air-conditioned cold air to a desired location. The heat generation load processing capacity cannot be adjusted due to insufficient or excessive air volume, and even on the floor, waste heat air from the adjacent housing 8 is sucked in, causing a further temperature rise inside the housing 8 and causing electronic electrons. It may also remove the operating temperature of the device.

If a guide is provided in the vicinity of the air conditioner 5 as in Patent Document 1, the conditioned cold air may be diffused to the entire underfloor near the discharge port 6 of the air supply path 5 under the floor, but it is dispersed over the entire floor surface. There is no disclosure of a mechanism for evenly blowing out to each of the air outlets 9. In addition, at the stage when the guide installed under the floor near the discharge port 6 that blows conditioned air to the double underfloor air supply chamber 8 is moved to the state where it exhibits its performance and is switched to the heat storage operation, there is one point in the room. It is a technology that is switched to the return air port of the return air duct dedicated to the skeleton heat storage connected under the floor, and the air-conditioning cold air is distributed evenly over the entire floor without blowing out on the floor, which is another technology. On the other hand, when an inverted V-shaped straightening vane that guides the air-conditioned cold air from the housing 8 to the lower part of the floor is provided as in Patent Document 2, the airflow in the upper part of the underfloor space just below the floor surface is inverted V-shaped. Since it hits the side surface of the rectifying plate and its dynamic pressure is only changed in direction and flows into the suction port of the exhaust fan in front of it, high-speed air flows in by the inverted V-shaped rectifying plate if it is near the air conditioner 5, and it is far away. If slow air flows in. Therefore, the angle and size of the inverted V-shaped shape of the straightening vane must be adjusted, and leveling is difficult.

In the present invention, in a state where the blowout panels 4a are arranged in a row along the rows of the housings 8 of the electronic devices arranged in a row, the side parallel to the underfloor airflow direction of the row of blowout panels 4a. Separated by a pair of side guides along. The pair of side guides includes a direct side guide and a facing side guide. One side of the space below the floor surface is partitioned by a direct lower side guide, and the space below the housing 8 is partitioned by a facing side guide parallel to the direct lower side guide. A tubular space (hereinafter referred to as a tubular space) is formed between them. A barrier guide orthogonal to the air-conditioned cold air flow blown out from the discharge port 6a of the blowout elbow 6 of the air conditioner 5 in the range from the directly below side guide or the facing side guide to the middle of the tubular space toward the other side guide. Are staggered. Neither of the two side guides and the barrier guides need to completely partition from the floor slab to the floor panel, but they partition over almost the entire area. The dynamic pressure of the air-conditioning cold air discharged from the discharge port 6a of the blowout elbow 6 of the air conditioner 5 can be partially converted to static pressure by hitting the barrier guide while restricting the flow by the two side guides. The air-conditioned cold air can be transported from the air conditioner to the air-conditioning panel far from the air conditioner by utilizing the dynamic pressure while converting each air-conditioning panel dispersed in a row to an appropriate static pressure. In particular, even in the vicinity of the air conditioner, the dynamic pressure of the air-conditioning cold air discharged from the discharge port 6a can be partially converted to static pressure by the action of the downstream barrier guide, so that the underfloor becomes negative pressure and backflow occurs. Never.

If the air conditioning cold air blown out from the outlet of the air conditioner's outlet elbow and the central axis of the tubular space are not on a straight line, next to the tubular space so as to change the direction of the air conditioning cold air blown out from the outlet. A conditioned guide that guides the air conditioner diagonally at an angle may be provided at a position that can be connected to the side guide of the underfloor space.

FIG. 4 shows the underfloor where the underfloor airflow control structure according to the present embodiment is installed in the examples of FIGS. 1 and 2. Blowout panels 4a (shaded in both FIGS. 2A and 4A) are arranged in rows along the rows P, Q, R, and S (shown in FIG. 2A) of the housing 8 provided with electronic devices inside. Has been done. The tubular spaces p, q, and r are provided along the space below the row of the housing 8 of the rows P, Q, and R, and are parallel to the discharge port airflow direction of the outlet panel 4a that sends air-conditioned cold air to each row. One side of the lower space is partitioned by the direct lower side guide 10a along the side, and the space below the housing 8 is partitioned by the opposite side guide 10b in parallel with the direct lower side guide 10a. The surroundings are surrounded by the guide 10a and the facing side surface guide 10b. Further, the tubular space s is provided along the space below the row of the housing 8 of the row S, and is below along the side parallel to the discharge port airflow direction of the outlet panel 4a that sends conditioned cold air to each row. One side of the space on the side is partitioned by a side guide 10a directly below, the other side is separated by a wall of a computer room parallel to the side guide 10a directly below, and the upper and lower sides are surrounded by a floor slab 2 and a floor panel 4. .. In the floor panel 4 on the upper side of each tubular space, the blowout panels 4a are arranged in a row along the side guide 10a on the lower side in FIG. 4A, and the floor panel 4a on the upper side in FIG. 4A of each of the other tubular spaces is arranged in a row. 4 is a closed panel. There is one or more floor posts 3 (two or more in the figure) between the floor post 3 to which the direct lower side guide 10a is fixed and the floor post 3 to which the opposite side surface guide 10b is fixed. There is. Further, in each tubular space, a barrier guide 11 that obstructs the flow of air-conditioned cold air is provided in the range from the pair of side guides 10 (directly below side guides 10a and facing side guides 10b) to the middle of the center of the tubular space. They are provided alternately in the direction of air flow.
The barrier guide 11 has a floor post (side guide in the figure) in which one end is fixed to the floor post 3 to which the side guide 10 on one side is fixed and the other end is between the floor posts 3 to which the side guide on the other side is fixed. Is fixed to the fixed floor post 3 (only one inside) so that it is installed orthogonal to the side guide 10 and in the range halfway toward the other side guide, the tubular space The air-conditioned cold air flowing in the length direction obstructs the flow, and guides the flow to the space between the end of the barrier guide 11 and the side guide 10 while changing the direction.
For example, in the tubular space p, the side close to the discharge port 6a is a barrier guide in the range from the right end of the right end of the right lower side guide 10a on the lower side in FIG. 4A to the first floor post 3 upward. 11a is provided, and the barrier guide 11b is provided in the range from the right end of the facing side surface guide 10b on the upper side in FIG. 4A to the first floor post 3 downward from the seventh post. In FIG. 4A, the shaded floor panel is the arrangement position of the blowout panel 4a, and the others are the arrangement positions of the closed panel 4b.

Both the side guide 10 and the barrier guide 11 are flat plates made of plastic veneer. Plavenia is a hollow sheet that joins two parallel polypropylene thin plates via strips that are installed in parallel so as to be orthogonal to it, and is a lightweight and easily available material at the work site. Since the side guide 10 and the barrier guide 11 are fixed to the floor post 3 which stands perpendicular to the surface of the floor slab 2, both the side guide 10 and the barrier guide 11 have a plane perpendicular to the surface of the floor slab 2. provide. Further, the position of the side guide 10 and the position of the barrier guide 11 are on a line connecting between the grid intersections where the floor post 3 is installed or on a parallel line in the vicinity of the connecting line.

In the tubular spaces p, q, r, s, the apex of the blowout panel is mounted on the floor post 3 to which the side guide 10 on one side is fixed, and the tubular spaces p, q, r, s via the blowout panel. The space inside s is open on the floor. Barrier guides are provided alternately so that when the space inside the tubular spaces p, q, r, and s is viewed from the upstream side to the downstream side through which the air-conditioned cold air flows, they can hardly be seen. This prevents the conditioned cold air from flowing linearly toward the wall 1c, so that part of the dynamic pressure of the conditioned cold air blown out from the discharge port 6a at high speed is not converted to static pressure and flows wastefully to the wall 1c. This is to prevent it from happening.

Since the tubular spaces q, r, and s are not in front of the air conditioner discharge port but at diagonally offset positions, the floor surface does not form a tubular space at an angle with respect to the grid intersection of the floor post 3. A rectifying guide 12 is fixed to the floor post 3 to block the upstream portion of the airflow in the underfloor space of the closing panel 4b, and guides the conditioned air diagonally toward the tubular spaces q, r, and s. By guiding in this way, almost all of the air-conditioned cold air flows through the tubular spaces p, q, r, and s.

5 and 6 are enlarged views of an underfloor YY cross section. The floor post 3 has a leg portion 3a installed on the floor slab 2 and a floor panel receiving portion 3b whose height can be adjusted with respect to the leg portion. The floor posts 3 are arranged at each intersection of the grids that are marked at the time of installation and support the square floor panel 4. A gantry 7 is installed on the floor slab 2 near the wall 1a, and the heavy and vibrating air conditioner 5 is mounted on the gantry 7. The blowout elbow 6 extends from the lower surface of the air conditioner 5, and the direction of the air conditioning cold air is changed so that the blowout direction is parallel to the floor slab 2. The conditioned cold air blown out parallel to the floor slab 2 flows toward the wall 1c on the opposite side. A cable rack 13 and a cable 14 are laid under the floor. Therefore, the side guide 10, the barrier guide 11, and the rectifying guide 12 are installed so as not to interfere with them by cutting out a part of the plastic veneer of the material.

6 is a partially enlarged view, FIG. 6A is an enlarged view of the barrier guide 11a located in the tubular space p, FIG. 6B is an enlarged view of the barrier guide 11c located in the tubular space q, and FIG. 6C is Z in FIG. 6B. -Z cross section. In FIG. 6A, the barrier guide (Plavenia) 11a is drilled at a position corresponding to the floor post, and eyelets 16 are driven into it. The barrier guide is fixed to the floor post 3 by a cable tie 17 through the eyelet 16. This fixed structure is also used for the side guide 10 and the rectifying guide 12. In FIG. 6B, the barrier guide 11c of the tubular space q has an end portion of the barrier guide 11c between adjacent floor posts 3. In this case, after making a hole in the floor slab 2, the anchor 20 which is a hole-in anchor is attached, while the metal fitting 21 is attached to the rib of the floor panel 4, and the anchor 20 of the floor slab 2 and the metal fitting 21 of the floor panel 4 are attached. A wire 19 is stretched between the and the wire 19 via a predetermined heaton. As shown in FIG. 6C, the molding member 18 is provided with a surrounding portion 18a for wrapping the wire 19 and a holding portion 18b for sandwiching the end portion of the barrier guide 11c. The molding member 18 suppresses the end of the barrier guide 11c, and the air-conditioned cold air suppresses the blurring that occurs at the end of the barrier guide 11c.

FIG. 7 shows the distribution of the underfloor air-conditioned cold air in the underfloor space having the tubular space p, q, r, and s, that is, the distribution of the underfloor air-conditioned cold air when the underfloor airflow control structure is installed this time. FIG. 7A is a wind speed vector distribution map in a plane. 3B shows the distribution of the wind speed blown up from the floor panel as a velocity vector when it is assumed that the entire area from the air conditioner 5 to the facing wall 1c is a blowout panel in the cross section XX of the tubular space p in FIG. 7B. It is a wind speed distribution map. In FIG. 7A, a part of the dynamic pressure of the conditioned cold air blown out from the discharge port 6a below the air conditioner 5 at high speed is blocked by the barrier guide 11 and converted from the dynamic pressure to the static pressure. Therefore, as typified by the tubular space p in FIG. 7B, the conditioned cold air can be blown onto the floor without creating a negative pressure on the floor on the upstream side of the barrier guide 11a. Further, the barrier guide 11 alternately converts the dynamic pressure into the static pressure by obstructing the flow. Then, the air-conditioned cold air is blown out onto the floor at a uniform speed from the blowout panel 4a. Since the wind speed and the air volume are lost by the time the wall 1c on the opposite side is reached, a large amount of air-conditioned cold air does not blow out on the wall 1c side on the opposite side as shown in FIG. 3B.

On the other hand, also in the other tubular spaces q, r, and s, the conditioned cold air from the air conditioner 5 is guided by the rectifying guide 12, and the conditioned cold air is introduced by the barrier guides 11 provided in each of the tubular spaces. The flow is obstructed. As a result, the conditioned cold air can be blown out at a uniform speed in the other tubular spaces as in the case of the tubular space p.

As described above, according to the present embodiment, the wind speed blown out from under the floor through the blowout panel 4a can be made uniform, so that the amount of air-conditioned cold air according to the amount of heat generated by the electronic device in the housing 8 is set in the grating area where the flat surface is installed. It can be installed in proportion, and it is possible to optimize heat generation treatment and level the temperature of electronic devices.
The computer room 1 in the embodiment shows a one-way computer room in which the housings 8 are arranged in a row but the rows are arranged in the forward direction, but the present invention is not limited to this, and the arrangement of the housings 8 is arranged in a row for the equipment inside the housing. Needless to say, it can also be applied to a hot aisle-cold aisle type room in which air suction and air discharge are aligned and faced in each row to combine cold air for suction and warm air on the discharge side.

1 Computer room 2 Floor slab 3 Floor post 4 Floor panel 4a Blow-out panel 4b Closed panel 5 Air conditioner 6 Blow-out elbow 7 Stand 8 Housing 9 Return air port 10 Side guide 10a Directly below side guide 10b Opposite side guide 11 Barrier guide 12 Rectification Guide 13 Cable rack 14 Cable 16 Eyelet 17 Binding band 18 Mall member

Claims (8)

A floor post was erected at the grid intersection that was marked out with respect to the floor slab, and the floor surface was installed on the floor post to create a double floor structure. Underfloor that supplies air and blows out from the floor to the housings to be cooled arranged in rows along the airflow direction of the air-conditioned cold air that is supplied horizontally above the floor and below the floor. In the airflow control structure
A floor in a space below the floor surface that sandwiches a row of housings to be cooled arranged in a row from both sides and sandwiches one or two or more floor posts in between. A pair of side guides consisting of a direct side guide and a facing side guide, which are fixed to the post facing each other and form a tubular space between the floor slab and the floor to allow air conditioning and cold air to flow along a row of housings. When,
One end is fixed to a floor post to which one of the pair of side guides is fixed, and the other end or in the middle of the pair of side guides is fixed to a floor post between the fixed floor posts. It has a barrier guide that is orthogonal to both of the pair of side guides and blocks the flow of air-conditioned cold air flowing in the length direction of the tubular space in a range halfway toward the other pair of side guides. ,
The floor surface includes a blowout panel having a grating surface or a perforated blowout port on the panel surface and a closed panel having no blowout port, and the floor surface forming the tubular space has one side surface thereof. The blowout panel is placed along the guide and the closure panel is placed along the other side guide.
A part of the air-conditioning airflow under the floor that flows horizontally near the pair of side guides is blocked by the barrier guides, and the dynamic pressure in the horizontal direction is converted into static pressure, resulting in a negative pressure on the floor. Without blowing out on the floor through the arranged blowout panel,
An underfloor airflow control structure characterized in that an airflow of air-conditioned cold air flows between the pair of side guides and the ends of the barrier guides.
In the underfloor airflow control structure according to claim 1, one end is fixed to a floor post to which the other side guide is fixed, and between the other end or a floor post to which the pair of side guides are fixed in the middle. Another barrier guide fixed to one floor post and orthogonal to the side guide is provided halfway toward the other side guide, and one barrier guide and the other barrier guide are provided alternately. Make sure that the barrier guides are offset from each other in the length direction of the tubular space so that the exit cannot be seen from the entrance of the tubular space.
The characteristic underfloor airflow control structure.
The underfloor airflow control structure according to claim 1 or 2, wherein the barrier guide and the side surface guide are formed of a plastic veneer .
In the underfloor air-conditioning control structure according to any one of claims 1 to 3, a space adjacent to the tubular space under the floor surface having a double floor structure by installing a floor surface on a floor post. The surface facing the air conditioner is closed, and the air conditioning cold air from the air conditioner is guided to the tubular space with respect to the air flow direction of the air conditioning cold air horizontally supplied to the lower side of the floor surface. An underfloor air-conditioning control structure characterized by having a rectifying guide fixed to a floor post so that the surface is positioned diagonally .
In the underfloor airflow control structure according to any one of claims 1 to 4, the other end of the barrier guide is fixed to a wire stretched between the floor slab and the floor surface. Underfloor airflow control structure .
A floor post was erected at the grid intersection that was marked out with respect to the floor slab, and the floor surface was installed on the floor post to create a double floor structure. Underfloor that supplies air and blows out from the floor to the housings to be cooled arranged in rows along the airflow direction of the air-conditioned cold air that is supplied horizontally above the floor and below the floor. In the construction method of the airflow control structure
A floor in a space below the floor surface that sandwiches a row of housings to be cooled arranged in a row from both sides and sandwiches one or two or more floor posts in between. A cylinder in which a pair of side guides consisting of a directly below side guide and a facing side guide are fixed to the post so as to face each other, and air-conditioned cold air surrounded by the pair of side guides flows between the floor slab and the floor surface. Form a space,
One end of the barrier guide is fixed to a floor post to which one of the pair of side guides is fixed so as to block the flow of air-conditioned cold air flowing in the length direction of the tubular space, and the other end of the barrier guide or the other end of the barrier guide or In the middle of the process, the other pair of side guides is fixed to the floor post between the fixed floor posts so that the pair of side guides are installed orthogonal to both of the pair of side guides.
The floor surface includes a blowout panel having a grating surface or a perforated blowout port on the panel surface and a closed panel having no blowout port, and the floor surface forming the tubular space has one side surface thereof. The blowout panel is placed along the guide and the closure panel is placed along the other side guide.
A part of the air conditioning airflow under the floor that flows horizontally near the pair of side guides is blocked by the barrier guide, and the dynamic pressure in the horizontal direction is converted into static pressure, which is a negative pressure on the floor. A method of constructing an underfloor airflow control structure, characterized in that the airflow is blown onto the floor through the arranged blowout panel.
In the method of constructing the underfloor airflow control structure according to claim 6, as another barrier guide, one end is fixed to the floor post to which the other side guide is fixed, and the other end or the pair in the middle thereof. The side guides are fixed to the floor post between the fixed floor posts and provided so as to be orthogonal to the side guides halfway toward the other side guides, with one barrier guide and the other barrier guide. A method of constructing an underfloor airflow control structure, which is provided in a staggered manner so that the exit can not be seen from the entrance of the tubular space by both barrier guides.
The method for constructing an underfloor airflow control structure according to claim 6 or 7, wherein the barrier guide and the side guide are formed of a plastic veneer.

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