JP2015165171A - Ventilation device for double floor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ventilation device for a double floor which efficiently supplies cooling air to the upper side of a rack.SOLUTION: A ventilation device for a double floor supplies air to an above-floor space by using a fan 10. A tapered passage 16 having a shape narrowed in an air flow direction by wind direction plates 15 disposed above the fan 10; and a club shaped passage 18 having a shape spreading in the air flow direction. It is preferable that the tapered passage 16 is disposed at the side spaced further away from the rack 4 than the club shaped passage 18 and an inlet of the tapered passage 16 is formed wider than an inlet of the club shaped passage 18.

Description

  The present invention relates to a double-floor ventilator that supplies air to a floor space by a fan.

  For example, in a data center or the like in which a large number of server racks are stored, a double floor structure in which a wiring space and an air conditioning space are used under the floor is employed. The cooling air is supplied to the air conditioning space under the floor by a large cooling device, and is blown out from the vent formed on the floor surface around the rack to the space above the floor.

  In general, since the cooling device is arranged on one side of the server room, the cooling air from the air conditioning space under the floor cannot be sufficiently reached at a location farther from the cooling device, which may cause a heat accumulation. Therefore, a double floor ventilator as shown in Patent Document 1 is used. The double-floor ventilator is disposed in the air-conditioned space under the floor and has a function of sucking cooling air in the air-conditioned space and blowing it out from the upper vent to the floor space because it is provided with a fan.

  However, even when a double-floor ventilator is used, it is difficult for the cooling air to reach the upper side of the rack installed on the floor. Especially when high-load equipment is installed on the upper side of the rack, the cooling of the equipment is not possible. There was a risk that it could not be performed sufficiently.

JP 2010-101550 A

  Accordingly, an object of the present invention is to solve the above-mentioned conventional problems and to provide a double floor ventilator capable of efficiently supplying cooling air to the upper side of the rack.

  The present invention made to solve the above problems, in a double floor ventilator for supplying air to the floor space by a fan, a plurality of flow paths for inducing air from the fan is formed on the upper side of the fan, These flow paths include a tapered flow path that narrows in the air flow direction and a thick flow path that widens in the air flow direction.

  The invention of claim 2 is characterized in that, in the invention of claim 1, the tapered flow path is arranged on a side farther from the rack arranged in the floor space than the thick flow path. According to a third aspect of the present invention, in the second aspect of the present invention, the tapered channel has an inlet larger than the tapered channel. According to a fourth aspect of the present invention, in the third aspect of the present invention, the flow path is a space formed between wind direction plates disposed above the fan. According to a fifth aspect of the present invention, in the fourth aspect of the present invention, a constant width channel is formed in a vertical direction between the tapered channel and the thick channel. The invention of claim 6 is the invention of claim 5, wherein a ventilation member supported by the wind direction plate is disposed on the upper surface of the wind direction plate.

  According to the present invention, the flow speed of the double floor ventilator can be changed by changing the shape of the flow path to a tapered flow path and a tapered flow path, and the cooling air from the fan reaches the upper side of the rack. Can be made.

  According to the second aspect of the present invention, the cooling air emitted from the side closer to the rack can also be directed to the rack by ejecting the cooling air at a higher speed from the side far from the rack.

  According to the invention of claim 3, the velocity of the wind discharged from the tapered channel can be increased by making the inlet of the tapered channel wider than the inlet of the tapered channel.

  According to the fourth aspect of the present invention, it is possible to easily form the tapered channel or the tapered channel only by changing the way of attaching the wind direction plate.

  According to the fifth aspect of the present invention, the cooling air jetted in the vertical direction can be merged with the high-speed cooling air from the tapered flow path and can flow to the upper side of the rack.

  According to the sixth aspect of the present invention, since the ventilation member is supported by the wind direction plate, there is no possibility of deformation even if a load acts on the ventilation member located on the floor surface.

It is a perspective view of a server room where a double floor ventilator is arranged. It is sectional drawing of the ventilator for double floors of 1st Embodiment. It is a perspective view of a wind direction unit. It is a schematic sectional drawing which shows the prior art example 1. It is a schematic sectional drawing which shows the prior art example 2. It is a schematic sectional drawing which shows 2nd Embodiment. It is a schematic sectional drawing which shows 3rd Embodiment. It is a schematic sectional drawing which shows 4th Embodiment. It is a schematic sectional drawing showing a 5th embodiment.

Embodiments of the present invention will be described below.
FIG. 1 is a perspective view of a server room in which a double-floor ventilation device is arranged. The floor surface 1 is a double floor supported by a column 2. A floor board panel 3 having ventilation holes is laid on the floor surface 1, and a number of racks 4 are closely arranged on the floor surface 1 to form a rack row. The underfloor space 5 is a wiring space and an air-conditioned space. 6 is a large cooling device disposed at one end of the server room, and supplies cooling air to the underfloor space 5. Cooling air flows into the space above the floor from the air holes formed in the floor panel 3 to cool the equipment inside the rack 4. As described above, since the cooling air does not reach the rack 4 at a position away from the cooling device 6, the double-floor ventilation device of the present invention is disposed in the underfloor space 5. FIG. 1 shows the surface panel 7 and the ventilation member 8.

  FIG. 2 is a cross-sectional view of the double floor ventilator according to the first embodiment of the present invention. The double-floor ventilator includes a fan unit 11 having a fan 10 and a wind direction unit 12 arranged on the upper side thereof. The fan 10 is an axial fan that sucks the cooling air in the underfloor space 5 and discharges it as an upward air flow. Reference numeral 13 denotes a frame-shaped mounting member formed on the upper part of the fan unit 11, on which the wind direction unit 12 is supported. In this embodiment, the rack 4 side of the double floor ventilator is fixed to the base of the rack 4 with L-shaped metal fittings, and the opposite side is supported by the support column 2. However, the mounting method of the double floor ventilation device is arbitrary, and it can be supported by the support column 2 or the floor panel 3. It can be placed directly in the underfloor space 5.

  As shown in FIG. 3, the wind direction unit 12 is attached to the frame-shaped frame 14 for guiding the wind discharged from the fan 10 upward, and to the inside of the frame-shaped frame 14 by screwing, riveting, or welding. A plurality of wind direction plates 15 are provided. As shown in FIG. 2, the ventilation member 8 is supported on the upper surfaces of these wind direction plates 15. The ventilation member 8 is a flat plate having a large number of ventilation holes such as a metal mesh or punching metal, and the periphery thereof is covered with the surface panel 7. As shown in FIG. 1, the front panel 7 and the ventilation member 8 are substantially the same height as the floor surface 1. Even when a person walks on the ventilation member 8, the ventilation member 8 is supported by the upper surface of the wind direction plate 15 and the frame-shaped frame 14, so that it does not deform.

  It is preferable that the wind direction unit 12 is square and the mounting direction is variable in units of 90 degrees with respect to the frame-shaped mounting member 13. However, as described in the following embodiments, it is preferable to set the wind direction unit 12 so that the cooling air blown from the wind direction plate 15 is directed toward the rack 3. As shown in FIG. 3, in this embodiment, the two wind direction units 12 are set on the rectangular attachment member 13, but the number of the wind direction units 12 is arbitrary. Although it is conceivable to attach the wind direction unit 12 to the front panel 7, a screw or the like protrudes from the floor surface to deteriorate the appearance, which is not preferable from the viewpoint of safety.

  If the heat generating device is installed only in the lower layer of the rack 4, it may not be necessary to operate the fan 10 on the side far from the rack 4. If the structure is such that the two wind direction units 12 are set on the rectangular mounting member 13 as in the present embodiment, the power supply of the fan 10 on the side closer to the rack 4 and the fan 10 on the side far from the rack 4 are separated. It is convenient to stop the operation.

  In the first embodiment shown in FIGS. 2 and 3, four wind direction plates 15 are fixed inside the frame-like frame 14. These wind direction plates 15 are arranged in parallel to the front surface of the rack 4 in plan view. However, as shown in FIG. 2, the two wind direction plates 15 at the center are vertically upward, but the wind direction plates 15 at both ends are mounted so as to be inclined so that the upper part approaches the rack 4. A plurality of flow paths for guiding the air from the fan 10 are formed between 15. The ventilation member 8 has a central portion that is the weakest part against the load, but the portion can be supported by two vertical wind direction plates 15.

  Therefore, the flow path formed between the wind direction plate 15 at the right end of FIG. 2 and the second wind direction plate 15 from the right is a tapered flow path 16 having a shape narrowing in the air flow direction. A constant-width channel 17 is formed between the two wind direction plates 15 at the center. The flow path formed between the wind direction plate 15 at the left end and the second wind direction plate 15 from the left is a thick flow path 18 having a shape spreading in the air flow direction.

  As illustrated, the width of the inlet of the tapered channel 16 is wider than the width of the inlet of the tapered channel 18. Further, the tapered channel 16 is arranged on the side farther from the rack 4 than the thick channel 18. The fan 10 has a characteristic that the air volume is larger at the outer side than the central part because the motor or the like is located at the center. For this reason, a large part of the air volume discharged from the fan 10 flows into the tapered flow path 16 having a wide inlet width, is jetted into the space above the floor as a higher-speed air flow, and moves toward the upper portion of the rack 4.

  On the other hand, the thick channel 18 has a shape in which the width of the inlet is narrow and the air flows in the direction of air flow. Further, although the central constant width channel 17 has the widest inlet width, since the air volume discharged from the fan 10 is not large, a medium air flow is formed vertically upward in both the air volume and the wind speed. However, the air flow from the central portion also merges so as to be engulfed by the high-speed air flow from the tapered flow path 16 and flows in the direction of the rack 4 as a whole.

  As a result, according to the present invention, the cooling air can reach the upper portion of the rack 4 as compared with the conventional double floor ventilation device. As a result of measuring the wind speed at a height of 190 cm above the front surface of the rack 4, the double floor ventilator of the present invention was 1.7 m / s, the conventional example 1 in FIG. 4 was 0.9 m / s, and the conventional one in FIG. 5. In Example 2, it was 0.7 m / s. In the conventional example 1, as shown in FIG. 4, all the wind direction plates are inclined at the same angle (60 degrees) toward the rack side, and in the conventional example 2, as shown in FIG. In order, they are 60 degrees, 70 degrees, 80 degrees, and 90 degrees. These conventional examples 1 and 2 do not have a structure in which a vertically upward air flow is engulfed by the air flow from the tapered flow path 16 disposed on the side far from the rack 4, and the wind speed at a high position is about half that of the present invention. falling.

  In the second embodiment shown in FIG. 6, a tapered flow path 16 and a thick flow path 18 are formed by three wind direction plates 15. Also in this case, the width of the inlet of the tapered channel 16 is wider than the width of the inlet of the thick channel 18. Further, the tapered channel 16 is arranged on the side farther from the rack 4 than the thick channel 18. The effect is the same as that of the first embodiment, and the cooling air can reach the upper portion of the rack 4.

  In the third embodiment shown in FIG. 7, the frame-like frame 14 of the wind direction unit 12 is inclined to have the same function as the wind direction plate 15. In FIG. 7, three wind direction plates 15 are provided, and a tapered flow path 16 is formed between the wind direction plate 15 at the right end and the frame-like frame 14. A thick channel 18 is formed between the two wind direction plates 15 on the left side. Furthermore, a constant-width channel 17 toward the rack 4 is formed at the left end, and a constant-width channel 17 is formed between the two right wind plates 15 and 15 on the right side.

  The fourth embodiment shown in FIG. 8 has two wind direction plates 15, and the fifth embodiment shown in FIG. 9 has one wind direction plate 15. In any case, the tapered channel 16 is disposed on the side farther from the rack 4 than the thick channel 18.

  In the above description, the rack 4 on one side has been described, but in an actual data center or the like, rack rows are formed on both the left and right sides across the passage. In that case, in addition to arranging a double-floor ventilator on the left and right respectively, a double-floor ventilator is placed under the floor at the center of the passage, and the right and left wind direction units 12 are changed to the racks 4 on the left and right sides. It is also possible to blow out the cooling air.

DESCRIPTION OF SYMBOLS 1 Floor surface 2 Support | pillar 3 Floor board panel 4 Rack 5 Underfloor space 6 Cooling device 7 Front panel 8 Ventilation member 10 Fan 11 Fan unit 12 Wind direction unit 13 Mounting member 14 Frame-shaped frame 15 Wind direction plate 16 Tapered flow path 17 Constant width flow path 18 Tip thick channel

Claims (6)

In the double floor ventilator that supplies air to the space above the floor with a fan,
A plurality of flow paths for guiding the air from the fan are formed on the upper side of the fan,
These flow paths include a tapered flow path narrowed in the air flow direction and a tapered flow path shaped in the air flow direction, and a double floor ventilator.   The double-floor ventilator according to claim 1, wherein the tapered channel is disposed on a side farther from the rack disposed in the floor space than the thick channel.   The double floor ventilator according to claim 2, wherein the inlet of the tapered channel is wider than the inlet of the thick channel.   The double-floor ventilator according to claim 3, wherein the flow path is a space formed between wind direction plates disposed above the fan.   The double-bed ventilation device according to claim 4, wherein a constant-width channel is formed between the tapered channel and the tapered channel in a vertical direction.   6. The double floor ventilation apparatus according to claim 5, wherein a ventilation member supported by the wind direction plate is disposed on an upper surface of the wind direction plate.

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