JP5164212B2 - Double-floor ventilation system - Google Patents

Description

  The present invention relates to a double floor ventilation device installed on a double floor such as a free access floor.

  Double floors such as free access floors have a wiring space and an air-conditioning space under the floor. For example, in a data center containing a large number of server racks, rack cooling air is introduced into each rack from the air-conditioned space in the double floor and used to cool the servers in the rack. The cooling air for this purpose is supplied to the air-conditioned space under the floor by a large cooling device, and is supplied indoors from the floor material around the rack.

  However, little cooling air is supplied at a position far from the cooling device. For this reason, if you want to blow a lot of cooling air around the rack that generates a large amount of heat, or if you want to cool the entire data center, place a double-floor ventilation device at an appropriate position from the conditioned space under the floor. The amount of air blown into the room is controlled.

  The double floor is composed of square flooring units each having a side of 50 cm or 60 cm, and is supported at a certain height by pillars at the four corners of each flooring unit. The double-floor ventilation device includes a mounting type that is directly placed on the floor below the flooring unit, and a type that is incorporated into the flooring unit. For example, Patent Document 1 describes the latter type of double floor ventilation device. The flooring unit is provided with support legs at the four corners, and the double-floor ventilator is arranged inside the pillars at the four corners. As shown in Patent Document 1, a double-floor ventilator has a square shape like a flooring unit, and usually has four or eight ventilators arranged symmetrically with respect to the center point thereof. FIG. 1 shows an example in which eight ventilation fans are arranged point-symmetrically.

  In data centers, etc., the room temperature and the temperature around individual racks are monitored, and among the ventilation fans arranged symmetrically according to the detected temperature, the adjacent ventilation fans are alternately turned off to partially stop operation. There are things to do. However, when performing such a partially stopped operation, as shown in FIG. 2, a part of the air blown from the operating ventilation fan enters the suction side through the gap between the adjacent stopped ventilation fans, and is being operated again. There was a possibility that the wind sucked into the ventilation fan would wrap around and the ventilation efficiency of the ventilation fan might be reduced.

In addition, when it is desired to replace the ventilation fans of these double-floor ventilation devices for repairs and inspections, conventionally, it was necessary to secure the work space by removing the adjacent flooring unit, which required complicated work. . If the double floor ventilator is downsized, the work space can be secured without removing the adjacent floor unit, but there is a problem that the number of ventilation fans must be reduced or downsized.
JP 2006-337004 A

  Accordingly, a main object of the present invention is to provide a double-floor ventilator that can prevent a reduction in ventilation efficiency of a ventilation fan due to wind sneaking even when a partial stop operation is performed. Another object of the present invention is to provide a double floor ventilator that can easily perform repair and inspection work without removing an adjacent flooring unit.

The present invention made in order to solve the above-mentioned problems defines a suction side of adjacent ventilation fans in a double-floor ventilation device in which a plurality of ventilation fans are arranged upward at the lower part of a main body portion provided with support legs at four corners. The partition wall has a structure in which it is suspended from the lower surface of the main body , and the partition wall is formed by assembling a plate material into a cross-girder frame shape and forming a small space for storing the control board in the central portion thereof. It is what.

It is to be noted that, as in claim 2, the partition wall is preferably assembled in a cross-girder frame shape by fitting the slits provided in each of the vertical partition plate and the horizontal partition plate.

Further, as in claim 3 , the main body is rectangular, and the length of the short side is made smaller than the distance between the inner side surfaces of the four corner columns of the flooring unit constituting the double floor, It is preferable to have a structure in which a working space is formed in a gap between adjacent flooring units.

  The double-floor ventilator according to the present invention has a partition wall that divides the suction side of an adjacent ventilator on the lower surface of the main body, thereby allowing air from the suction side of a stopped ventilator adjacent to the operating ventilator to stop. Can be prevented. For this reason, it is possible to prevent the ventilation efficiency of the ventilation fan from being lowered due to wind sneaking even when a partial stop operation is performed. Moreover, since the partition plate suspended from the lower surface of the main body portion acts as a reinforcing rib, the main body portion can be manufactured with a thin plate and the weight is reduced, so that workability such as installation work can be improved.

Moreover, by using the partition wall which assembled the board | plate material in the shape of a cross-beam frame, while being able to further raise intensity | strength , a control board can be accommodated in the small space of a center part . Also if as can be assembled by fitting the slit each other provided on each of the vertical partition plate and the lateral partition as claimed in claim 2 in a grid frame shape, since the curb frame-shaped blocks can be easily manufactured assembly Workability can be improved.

Further, as claimed in claim 3, if the gap to form a working space in the structure of the floor covering adjacent the outer long side side body portion is rectangular, servicing without removing the floor covering adjacent Work can be done.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 3 is a plan view of the double floor ventilation apparatus according to the present invention incorporated in the double floor, FIG. 4 is an enlarged view of the circled portion, and FIG. 5 is a perspective view. In these drawings, reference numeral 10 denotes a flooring unit, which is provided with support columns 12 at four corners of a floor panel 11 made of punching metal or the like. As described above, the floor unit 10 is usually a square unit having a side of 50 cm or 60 cm.

  The double-floor ventilator of the present invention is used by being incorporated into a double floor in which such a flooring unit 10 is laid, so that the flooring unit 10 can be installed in a removed space. The external dimensions are set so that they can be fitted without interfering with the pillars 12 at the four corners of the flooring unit 10. 6 is a perspective view thereof, and FIG. 7 is a perspective view in an inverted state. As shown in these drawings, the double-floor ventilation device of the present invention has a structure in which a plurality of ventilation fans 15 are arranged upward at the lower part of a main body portion 14 having support legs 13 at four corners. Is the same as before. The ventilation fan 15 is an axial fan.

  In this embodiment, the main body 14 is rectangular, and six ventilation fans 15 are arranged. A partition wall 16 that divides the suction side of the adjacent ventilation fan 15 is suspended from the lower surface of the main body portion 14. As shown in FIG. 8, the partition wall 16 consists of two types of two vertical partition plates 17 corresponding to rectangular long sides and two horizontal partition plates 18 corresponding to short sides. It is bent into a crank shape. Moreover, the slit 19 provided in the base part of the bending part of the horizontal partition plate 18 and the slit provided in the vertical partition plate 17 are incorporated and assembled into a cross frame shape as shown in FIG. And the bending part 23 formed in each edge part of the vertical partition plate 17 and the horizontal partition plate 18 is screwed to the outer wall 20 of the main-body part 14 as shown in FIG. In addition, what is necessary is just to set the height of the partition wall 16 according to the capacity | capacitance of the ventilation fan 15 suitably.

  If the partition wall 16 is suspended from the lower surface of the main body 14 in this manner, the suction side of the operating ventilation fan 15 and the suction side of the adjacent stopped ventilation fan 15 are partitioned as shown in FIG. It is possible to prevent air from being sucked from the suction side of the adjacent ventilation fan 15 that is stopped. For this reason, it is possible to prevent the ventilation efficiency of the ventilation fan from being lowered due to wind sneaking even when a partial stop operation is performed.

Further, the vertical partition plate 17 and the horizontal partition plate 18 suspended from the lower surface of the main body 14 act as reinforcing ribs. For this reason, even if the main body 14 is made of a thin plate, the strength against bending stress is increased. As a result, the weight of the main body 14 can be reduced, and the weight of the entire double floor ventilator is reduced, so that the installation work is facilitated. In particular, if the partition wall 16 in which the plate members are assembled in a cross-girder frame shape as in the present embodiment is used, the buckling deformation of each plate member is prevented, and the horizontal partition plate 18 is bent into a crank shape. It becomes a cross-girder shape with a portion where the plate 17 and the horizontal partition plate 18 overlap, and the strength can be further increased. Alternatively, both the vertical partition plate 17 and the horizontal partition plate 18 may be linear, and the upper side may be bent to form reinforcing sides. In the present invention, spaces corresponding to the three ventilation fans 15 are formed on both outer sides of the two vertical partition plates 17 and 17, respectively, and the central portion is a small space 21 surrounded by four plate members. . Thereby, the reinforcement effect of the central part which is most flexible can be enhanced. This small space 21 can accommodate a control board.

  In the present embodiment, six ventilation fans 15 are arranged with the main body 14 as a rectangle. And if the length of the short side of the main-body part 14 is made smaller than the distance between the inner side surfaces of the support | pillars 12 and 12 of the four corners of the flooring unit 10, as shown in FIG. A working space 22 is formed in the gap with the unit. With such a structure, it is possible to remove the double-floor ventilator by putting a hand from both sides without removing the adjacent floor unit 10, so that repair and inspection work can be easily performed. Note that when the conventional eight ventilation fans are simply reduced to six, the air flow is reduced. Therefore, in this embodiment, each ventilation fan 15 is slightly increased in size to prevent a reduction in the total air volume.

  In practicing the present invention, it is possible to reduce the size of the main body 14 while maintaining the square shape. In this case, however, the working space 22 is formed in four directions, which is wasteful, and it is difficult to avoid a reduction in the air volume due to a reduction in the mounting area of the ventilation fan 15. It is advantageous to make 14 a rectangle.

  As shown in FIG. 10, if the top panel of the main body 14 can be removed, the ventilation fan 15 can be replaced without removing the entire double floor ventilation device from the double floor. Maintenance can be further improved. Further, in order to protect the ventilation fan 15, the upper surface of the main body portion 14 is covered with a fine metal mesh to prevent foreign matter from entering, and a punching metal is provided on the lower surface of the ventilation fan 15 to mistakenly attach the ventilation fan 15 during installation work. It is preferable to prevent the hand from entering. However, illustration of these wire mesh and punching metal is omitted. In this embodiment, the double floor ventilation device is described as being placed directly on the floor below each flooring unit 10, but it may be of a type incorporated in the flooring unit.

  As described above, according to the present invention, it is possible to prevent the ventilation efficiency of the ventilation fan from being lowered due to the sneak in the wind even when a partial stop operation is performed. Further, with the configuration as in the embodiment, the repair and inspection work can be easily performed without removing the adjacent flooring unit, and the maintainability can be improved.

It is a perspective view which shows the prior art example which has arrange | positioned eight ventilation fans point-symmetrically. It is sectional drawing which shows the problem of a prior art. It is a top view of the state which incorporated the ventilation apparatus for double floors of this invention in the double floor. FIG. 4 is an enlarged view of a circled portion in FIG. 3. It is a perspective view of the state where the ventilator for double floors of the present invention was built in the double floor. It is a perspective view of the ventilation apparatus for double floors of this invention. It is a perspective view of the state reversed up and down. It is a perspective view of a partition wall. It is explanatory drawing of the effect of this invention. It is a perspective view which shows the state which removed the upper surface panel of the main-body part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Flooring unit 11 Floor board panel 12 Support | pillar 13 Support leg 14 Main body part 15 Exhaust fan 16 Partition wall 17 Vertical partition board 18 Horizontal partition board 19 Slit 20 Outer wall 21 Small space 22 Work space 23 Bending part

Claims (3)

In a double-floor ventilator with a plurality of ventilators facing upward at the bottom of the main unit with support legs at the four corners, a structure in which the partition wall that partitions the suction side of the adjacent ventilator is suspended from the lower surface of the main unit And the partition wall is formed by assembling plate materials into a cross-girder frame shape and forming a small space for storing the control board at the center thereof . 2. The double floor ventilator according to claim 1, wherein the partition wall is assembled in a cross-girder frame shape by fitting slits provided in each of the vertical partition plate and the horizontal partition plate .   The main body is rectangular, and the length of the short side is smaller than the distance between the inner side surfaces of the four pillars of the floor unit constituting the double floor. 2. The double floor ventilator according to claim 1, wherein a working space is formed in the double floor.

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