JP6622614B2 - Air blowing device and air blowing control method - Google Patents

Description

  The present invention relates to air conditioning technology in a machine room or the like having a double floor structure.

  Devices such as large-capacity servers and high-speed routers are used and operated in various forms of business. These devices generate a large amount of heat and must be cooled.

  For example, as shown in Patent Document 1, in a general air conditioning system, an air conditioner is disposed near a wall of a machine room, and the apparatus is cooled by using a double floor under an airflow space.

JP2013-72575A

  In the air conditioning system described above, the cold air from the air conditioner passes through the double floor, passes through the double floor panel with small holes, is supplied to the front of the rack on which the device is mounted, and passes through the inside of the device. The high temperature air is returned to the air conditioner. However, the conventional technology has a problem that the amount of cool air supplied from the double floor panel may be insufficient.

  The present invention has been made in view of the above points, and provides a technology that can solve the shortage of the amount of cold air supplied from a double floor panel in an air conditioning system in a machine room or the like having a double floor structure. The purpose is to do.

According to an embodiment of the present invention, an air blowing device comprising a pipe for blowing air blown from an air conditioner at the lower part of a double floor panel to the upper part of the double floor panel,
An air inlet into which air blown out from the air conditioner flows, and an air introduction section extending from the inlet in the blowing direction of the air conditioner;
A direction changing unit that changes the direction of air flow so that air flows in the direction of the opening of the double floor panel;
A blowing port provided at the position of the opening, and a blowing unit that blows out the air whose direction has been changed by the direction changing unit toward a predetermined device;
The predetermined device is provided in a rack having a front surface parallel to a blowing direction of the air conditioner, and air flowing in from the inflow port is moved from the blowing direction of the air conditioner by the direction changing unit. The direction is changed to the direction toward the front,
The air blowing device is characterized in that the opening has a shape having a longitudinal direction in a direction away from or approaching the front surface of the rack, and the blowout port is configured to be movable along the longitudinal direction. Provided.

Further, according to the embodiment of the present invention, there is provided an air blowing control method in which the air blown from the air conditioner at the lower part of the double floor panel is blown to the upper part of the double floor panel by the air blowing device composed of a pipe. hand,
Let the air blown from the air conditioner flow into the inlet of the pipe,
The double floor panels in the direction of the opening so that air flow, and changing the direction of flow of air is the inlet, the outlet of said pipe provided in the position of the opening, the air a certain An air blowing control method that blows out toward the device ,
The predetermined device is provided in a rack having a front surface parallel to a blowing direction of the air conditioner, and air flowing in from the inflow port is moved from the blowing direction of the air conditioner to the front surface of the rack by the pipe. The direction is changed to the direction to go,
The opening has a shape having a longitudinal direction away from or approaching the front surface of the rack, and moves the outlet along the longitudinal direction.
An air blowing control method is provided.

  According to the embodiment of the present invention, in an air conditioning system in a machine room or the like having a double floor structure, it is possible to solve the shortage of the amount of cold air supplied from the double floor panel.

It is a figure for demonstrating the flow of the air in a machine room. It is a figure for demonstrating a hot aisle and a cold aisle. It is a figure for demonstrating the flow of the air in a machine room. It is a figure which shows the air blowing apparatus in this Embodiment. It is a figure for demonstrating the structure of a pipe. It is the figure which looked at the machine room from the top. It is the figure which looked at the air blowing apparatus from the x-axis direction. It is the figure which looked at the part near the blower outlet of an air blower device from the y-axis direction. It is a figure which shows a part of cross section of a honeycomb type rectifying plate. It is a figure which shows the example at the time of installing the floor panel with a built-in fan.

  Embodiments of the present invention will be described below with reference to the drawings. The embodiment described below is merely an example, and the form to which the present invention can be applied is not limited to the following embodiment. For example, in the following, an example in which the air blowing device (pipe) blows out cold air is described. However, depending on the usage situation, the air blowing device blows out air that has not been cooled / heated or blows out warm air. It may be.

(Air flow in the machine room)
Before describing the air blowing device in the present embodiment in detail, first, the basic structure of the machine room in which the air blowing device is installed and the air flow will be described.

  In this embodiment, the apparatus mounted on the rack is basically cooled by cold air blown from an air conditioner installed in a machine room having a floor with a double floor structure. Here, the “machine room” may be any place as long as a device to be cooled (referred to as “cooling target device”) is installed. The cooling target device mounted on the rack is not particularly limited, but examples include a server, a router, a switch, an exchange, and a PBX.

  FIG. 1 is a diagram for explaining how air flows in a machine room according to the present embodiment. As shown in FIG. 1, in this example, a rack 20 on which a device to be cooled is mounted is installed on a double floor panel 30 having a large number of small holes. As shown in FIG. 1, the rack 20 is a set of a plurality of racks (individual racks). Here, this set is referred to as a “rack”.

  In addition, an air conditioner 10 is installed as illustrated. The air conditioner 10 according to the present embodiment blows cold air under the double floor in a direction parallel to the front surface of the rack described as “rack front surface” and parallel to the floor surface.

  As shown in FIG. 1, the cold air 40 output from the air conditioner 10 flows under the double floor while decreasing the momentum as the distance from the air conditioner 10 increases, and from the small holes of the double floor panel to the double floor. As cold air 50. The cool air 50 is sucked to the front surface of the rack, cools the device to be cooled in the rack 20, and is discharged from the back surface of the rack as high-temperature exhaust 60. The exhaust 60 is returned to the air conditioner 10 through the ceiling.

  The cold aisle and hot aisle described in FIG. 1 will be described with reference to FIG. As described above, the present embodiment employs a method in which cold air is sucked from the front surface of the rack 20 to cool the device to be cooled and exhausted from the rear surface of the rack 20. This method is a generally used method.

  Normally, a plurality of racks 20 are installed in the machine room. However, for the purpose of improving air conditioning efficiency, as shown in FIG. 2, a plurality of racks 20 are set in pairs so that the front surfaces of the two racks face each other. Racks are arranged in parallel. In the example of FIG. 2, the front surface of the rack 21 and the front surface of the rack 22 face each other, and the back surface of the rack 22 and the back surface of the rack 23 face each other.

  In this case, since the cold air 50 is sent in the row where the front of each rack faces, as described in FIG. 1, this is called a cold aisle. Moreover, since the exhaust 60 which became high temperature gathers in the row | line | column which the back surface of each rack faces, this is called a hot aisle.

  As shown in FIG. 3, the flow rate at the outlet of the air conditioner 10 is high so that the portion of the rack 20 that is farthest from the air conditioner 10 can be appropriately cooled. Therefore, in the vicinity of the air conditioner 10, due to the jet pump effect, the pressure on the double floor panel 30 having small holes becomes negative and the cool air 40 is not sent to the rack 20, and the device to be cooled is not sufficiently cooled. Further, since the cold aisle has a negative pressure, the hot aisle hot exhaust 51 flows backward, causing a reduction in overall air conditioning efficiency. The air blowing device 100 according to the present embodiment can solve at least such a problem.

(Regarding air blowing device 100 in the present embodiment)
FIG. 4 shows a part of the machine room in which the air blowing device 100 according to the present embodiment is installed. The air blowing device 100 is a device composed of a cold air guiding pipe.

  As shown in FIG. 4, cold air induction pipes 101, 103, and 105 are provided at the lower part of the double floor panel 30 on the front side (surface to which cold air is applied) of the rack 20. The outlets of the pipes are positioned on the surfaces of the openings 102, 104, and 106 opened in the double floor panel 30, and cool air is blown out above the double floor panel 30.

  Taking the pipe 101 as an example, the flow of the cold air will be described. The high-speed cold air 41 output from the air conditioner 10 enters the pipe 101 from the inlet of the pipe 101 toward the air conditioner 10, and along the pipe 101, the rack 101 The air is blown to the front surface of the rack 20 as cold air 44 at an angle on the oblique upper side in the direction toward the front surface of the rack 20. Since the outlet of the pipe 101 is closer to the front surface of the rack 20 than the outlet of the other pipes, the cold air 44 is blown out to a lower position on the front surface of the rack 20 than the cold air blown out from the other pipes. In this way, it is possible to determine the height of the front of the rack to which cool air is applied according to the distance from the front of the rack to the outlet of the pipe. As will be described later, the outlet can be moved (slid) along the longitudinal direction of the opening 102, and the height of the front surface of the rack to which cool air is applied can be adjusted by this movement.

  In the case of the pipe 103, the high-speed cold air 42 output from the air conditioner 10 enters the pipe 103 from the inlet of the pipe 103 toward the air conditioner 10, and travels along the pipe 103 toward the front surface of the rack 20. The air is blown to the front surface of the rack 20 as cold air 45 at an angle on the upper side. Since the outlet of the pipe 103 is located farther from the front surface of the rack 20 than the outlet of the pipe 101, the cold air 45 blows out to a position higher on the front surface of the rack 20 than the cold air blown from the pipe 101.

  In the case of the pipe 105, the high-speed cold air 43 output from the air conditioner 10 enters the pipe 105 from the inlet of the pipe 105 toward the air conditioner 10, and travels along the pipe 105 toward the front of the rack 20. The air is blown to the front surface of the rack 20 as cold air 46 at an angle on the upper side. Since the outlet of the pipe 105 is located farther from the front surface of the rack 20 than the outlet of the pipe 103, the cold air 46 is blown out to a position higher than the cold air blown from the pipe 103.

  In the example of FIG. 4, three pipes are provided. However, this is an example, and there may be fewer than three or more than three. However, if the number of pipes is too large, the amount of cold air to the rack portion on the side far from the air conditioner 10 may be reduced, so the number of pipes is preferably about 2 or 3. Moreover, although the thickness of a pipe is 5 cm-10 cm, for example, it is not restricted to this, It may be thinner than 5 cm and may be thicker than 10 cm.

  The material of the pipe is not particularly limited, and any material may be used as long as the material has rigidity capable of maintaining the illustrated shape. For example, metal or plastic may be used.

  FIG. 5 is a diagram for explaining the configuration of the pipe 101 (air blowing device 100), taking the pipe 101 as an example. As shown in FIG. 5, the pipe 101 has an inflow port 151 into which air blown out from the air conditioner 10 flows, and an air introduction part 152 extending from the inflow port 151 in the blowing direction of the air conditioner 10, It has a direction changing part 153 that changes the air flowing direction so that air flows in the direction of the opening of the floor panel, and an outlet 155 provided at the position of the opening, and the direction is changed by the direction changing part 153. And a blowing section 154 that blows out the converted air toward the apparatus to be cooled. In addition, for example, the air introduction part 152 is a part of a straight line shape (the center line of the pipe is a straight line shape, the same applies hereinafter) up to the direction change part 153, and the direction change part 153 is a curved part. Reference numeral 154 denotes a linear portion after the direction changing unit 153.

  FIG. 6 is a view when the machine room is viewed from above (when viewed from above in the z-axis direction shown in FIG. 4). The pipe below the double floor panel is shown as a dotted line. As shown in FIG. 6, 102, 104, and 106 each indicate an opening opened in a double floor panel. Moreover, each blower outlet located in an opening part is shown. As shown in FIG. 6, when viewed from above, the inlet of each pipe is directed toward the air conditioner 10, and the pipe extends from the inlet in a direction parallel to the flow of the cold air, and is substantially perpendicular to the rack 20 side. Change the angle to extend to the opening.

  The length of the portion parallel to the cold air indicated by A in the pipe 101 is, for example, 20 cm to 30 cm, but may be shorter than 20 cm or longer than 30 cm. The same applies to the pipes 103 and 105. However, if the portion indicated by A is too long, the resistance is increased, and the momentum of the cold air from the outlet may be weakened.

  Moreover, in the example of FIG. 6, although the length of the part A of three pipes is made comparable, it is good also as changing length. For example, the portion A in the pipe 102 may be shorter than the portion A in the pipe 105.

  As shown in FIG. 6, the openings 102, 104, 106 are provided so as to extend in a direction perpendicular to the front surface of the rack 20. The width of each opening is about the same as the diameter of the pipe. Moreover, as will be described later, the pipe includes a bellows portion, and the blowout port can be moved along the longitudinal direction of the opening. The length of the opening in the longitudinal direction is about the same as the length that the pipe can move.

  In the example shown in FIG. 6, the opening 102 closest to the air conditioner 10 is provided at a position closest to the front surface of the rack 20. And as shown by the opening parts 104 and 106, it is provided so that it may also leave | separate from the rack 20 as it leaves | separates from the air conditioner 10. As shown in FIG. However, this is an example, and the opening 102 is installed at a position farthest from the front of the rack 20, the opening 104 is installed at a position farthest from the front of the rack 20, and the opening 106 is installed at the most front of the rack 20. You may install in the position near. Moreover, it is good also considering the distance from the front surface of the rack 20 of each opening part as comparable.

  7 is a diagram when viewed from the front of the rack 20 (when viewed from the x-axis direction of FIG. 4). Further, FIG. 7 shows only the pipe 101 for convenience of illustration (shown in bold for the sake of clarity). In the example illustrated in FIG. 7, an image of the cooling target device mounted on the rack 20 is illustrated. As shown in FIG. 7, each cooling target device is often installed with an open space relative to other cooling target devices. Therefore, for example, the air blowing device 100 according to the present embodiment, which can blow out cool air pinpointed toward a cooling target device having a large calorific value, is effective.

  Now, as shown in FIG. 7, when viewed from the front, the pipe 101 is installed on a table or the like so that the inlet is at a predetermined height from the floor. Then, the pipe extends horizontally from the inflow port (extends in the direction in which the cool air blows out from the air conditioner 10), and the direction is changed toward the opening 102 from the middle to reach the opening 102.

  FIG. 8 is a view of the vicinity of the outlet of the pipe 101 (the same applies to the pipes 103 and 105) (portion toward the rack 20) as seen from the y-axis direction shown in FIG.

  As shown in FIG. 8, the pipe 101 is directed in a direction inclined from the horizontal direction to the vertical direction by an angle indicated by θ. The outlet is provided so that its surface is at the same height as the opening 102 (floor panel) and parallel to the surface of the opening 102. However, this is an example, and the blowout port may be below or above the surface of the opening 102 to some extent. Note that the angle θ may be different for each pipe or may be common among the pipes.

  As shown in FIG. 8, a bellows portion 111 is provided in a part of the pipe 101, and the blowout port can be moved along the longitudinal direction of the opening 102 by the expansion and contraction of the bellows portion 111. The bellows part 111 is provided, for example, in the direction changing part 153 shown in FIG. Further, the bellows portion 111 may be provided in the blowing portion 154 or in a portion from the direction changing portion 153 to the blowing portion 154.

  Note that a configuration in which the bellows portion 111 is not provided is also possible. In that case, for example, the position of the outlet can be adjusted by moving the entire pipe back and forth along the x-axis direction shown in FIG.

  Further, as shown at 112 in FIG. 8, a honeycomb type rectifying plate is attached to the tip portion (the blowing portion 154) of the pipe 101 (the same applies to the pipes 103 and 105). The cross section of the honeycomb type rectifying plate 112 is as shown in FIG.

  By providing the honeycomb type rectifying plate 112, the cold air is rectified, and the cold air can be blown out more toward the device to be cooled. The rectifying plate is not limited to the honeycomb type, and may be a rectifying plate having another shape such as a lattice plate. Moreover, it is good also as not providing a baffle plate. This is because even if the current plate is not provided, the pipe itself has the effect of blowing cold air toward the cooling target device at the pinpoint.

(Effects and effects of the embodiment)
As described above, according to the air blowing device 100 described above, the cold air is guided from the double floor to the front side of the rack 20 using the high-speed blowing flow from the air conditioner 10, so that the cooling target device can be cooled even in the vicinity of the air conditioner 10. It becomes possible. Further, the generation of the negative pressure described with reference to FIG. 3 can be prevented, and the backflow of the high-temperature exhaust gas from the hot aisle to the cold aisle can be suppressed.

  In addition, by installing a honeycomb-type rectifying plate in the vicinity of the outlet of the pipe, diffusion of the cold airflow is suppressed, and the rack 20 can be pinpointed more effectively.

  Also, by providing a bellows part on the cold air induction pipe, the pipe can be expanded and contracted, and the height of the cold air can be freely adjusted by sliding the outlet position along the longitudinal direction of the opening. It becomes.

  In order to prevent the negative pressure described with reference to FIG. 3, for example, as shown in FIG. 10, a floor panel 35 with a built-in fan is installed in a portion where the negative pressure is present, and the double floor It is also conceivable to blow cool air on the floor. However, this method is not a preferable method because of the occurrence of wiring work and the necessity of electric power for fan operation. According to the air blowing device 100 according to the present embodiment, it is possible to supply cold air to the front surface of the rack 20 in the vicinity of the air conditioner 10 without causing wiring work and without using extra power. The air conditioning efficiency of the room can be improved. That is, the shortage of the cool air supply air volume from the double floor panel can be solved.

(Summary of embodiment)
As described above, according to the present embodiment, the air blowing device comprising a pipe for blowing the air blown from the air conditioner at the lower part of the double floor panel to the upper part of the double floor panel, It has an inflow port into which air blown out from the air conditioner flows, and the air flows from the inflow port toward the air introduction unit extending in the blowing direction of the air conditioner and the opening of the double floor panel. A direction changing portion that changes the direction of air flow, and a blowout portion that has a blowout opening provided at the position of the opening, and blows out air whose direction has been changed by the direction changing portion toward a predetermined device. An air blowing device is provided.

  The predetermined device is provided, for example, in a rack having a front surface parallel to the blowing direction of the air conditioner, and the air flowing in from the inflow port is moved from the blowing direction of the air conditioner by the direction changing unit. The direction is changed to the direction toward the front of the rack.

  The opening may have a shape having a longitudinal direction in a direction away from or approaching the front surface of the rack, and the outlet may be configured to be movable along the longitudinal direction. Moreover, it is good also as providing the baffle plate which rectifies air in the said blowing part.

(Section 1)
An air blowing device comprising a pipe for blowing air blown from the air conditioner at the lower part of the double floor panel to the upper part of the double floor panel,
An air inlet into which air blown out from the air conditioner flows, and an air introduction section extending from the inlet in the blowing direction of the air conditioner;
A direction changing unit that changes the direction of air flow so that air flows in the direction of the opening of the double floor panel;
A blow-out unit that has a blow-out port provided at the position of the opening, and blows out the air whose direction has been changed by the direction conversion unit toward a predetermined device;
An air blowing device comprising:
(Section 2)
The predetermined device is provided in a rack having a front surface parallel to a blowing direction of the air conditioner, and air flowing in from the inflow port is moved from the blowing direction of the air conditioner by the direction changing unit. The direction is changed to the direction toward the front.
The air blowing device according to item 1, characterized in that:
(Section 3)
The opening has a shape having a longitudinal direction away from or approaching the front surface of the rack, and the outlet is configured to be movable along the longitudinal direction.
The air blowing device according to item 2, characterized in that:
(Section 4)
The blowout portion includes a rectifying plate that rectifies air.
The air blowing device according to any one of the first to third items.
(Section 5)
An air blowing control method in which air blown from the air conditioner at the lower part of the double floor panel is blown to the upper part of the double floor panel by a pipe,
Let the air blown from the air conditioner flow into the pipe,
The flow direction of the inflowed air is changed so that the air flows in the direction of the opening of the double floor panel, and air is supplied from a pipe outlet provided at the position of the opening to a predetermined device. Blow out towards
The air blowing control method characterized by the above-mentioned.
The present invention is not limited to the above-described embodiment, and various modifications and applications are possible within the scope of the claims.

DESCRIPTION OF SYMBOLS 10 Air conditioner 20 Rack 101, 103, 105 Pipe 102, 104, 106 Opening part 111 Bellows part 112 Honeycomb type rectifying plate 151 Inlet 152 Air introduction part 153 Direction change part 154 Outlet part 155 Outlet

Claims (3)

An air blowing device comprising a pipe for blowing air blown from the air conditioner at the lower part of the double floor panel to the upper part of the double floor panel,
An air inlet into which air blown out from the air conditioner flows, and an air introduction section extending from the inlet in the blowing direction of the air conditioner;
A direction changing unit that changes the direction of air flow so that air flows in the direction of the opening of the double floor panel;
A blowing port provided at the position of the opening, and a blowing unit that blows out the air whose direction has been changed by the direction changing unit toward a predetermined device;
The predetermined device is provided in a rack having a front surface parallel to a blowing direction of the air conditioner, and air flowing in from the inflow port is moved from the blowing direction of the air conditioner by the direction changing unit. The direction is changed to the direction toward the front,
The air blowing device , wherein the opening has a shape having a longitudinal direction in a direction away from or approaching the front surface of the rack, and the blowing port is configured to be movable along the longitudinal direction . The air blowing device according to claim 1, wherein the blowing unit includes a rectifying plate that rectifies air. An air blowing control method in which air blown from an air conditioner at the lower part of a double floor panel is blown out to the upper part of the double floor panel by an air blowing device comprising a pipe,
Let the air blown from the air conditioner flow into the inlet of the pipe,
The double floor panels in the direction of the opening so that air flow, and changing the direction of flow of air is the inlet, the outlet of said pipe provided in the position of the opening, the air a certain An air blowing control method that blows out toward the device ,
The predetermined device is provided in a rack having a front surface parallel to a blowing direction of the air conditioner, and air flowing in from the inflow port is moved from the blowing direction of the air conditioner to the front surface of the rack by the pipe. The direction is changed to the direction to go,
The opening has a shape having a longitudinal direction away from or approaching the front surface of the rack, and moves the outlet along the longitudinal direction.
The air blowing control method characterized by the above-mentioned .

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