JP5756210B2 - Airflow optimization means when mounting ICT equipment in cabinet - Google Patents

Description

  The present invention relates to airflow optimization means when mounting an ICT device in a cabinet, and more particularly to a diffuser design method for optimizing the airflow in a cabinet in order to improve the cooling efficiency of the ICT device.

  In recent years, with the spread of the Internet and ICT services, power consumption in communication machine rooms and data centers has increased significantly. In particular, the amount of heat generated is rapidly increasing due to the higher functionality and higher density of communication devices and server machines (hereinafter referred to as ICT devices).

  This type of ICT equipment has a dedicated operating room (space) that is temperature-controlled at an appropriate temperature in order to perform processing of a huge amount of data with multiple units arranged in an orderly manner. It is done to install.

  In this dedicated room, a plurality of ICT devices are mounted and supported in a form of stacking in parallel while securing a gap between the vertical direction in a cabinet (equipment storage rack) having a width and depth of one unit. The cabinets are laid out in a row. If there is a need to install multiple rows of cabinets, the layout should be such that the front of the ICT equipment faces the front. This type of ICT equipment generates heat during data processing and other operations, and the rise in temperature causes failure and malfunction.Therefore, the air inside the ICT equipment and the cabinet is expelled to the outside and exhaust air is taken in. Heat treatment is necessary, and cooling is effectively performed by using the outside air taken in as cold air (fluid).

  Furthermore, in this dedicated room, cold air is blown out between the opposing cabinet rows to form a cold air space (cold aisle), which flows into the gaps between the individual ICT equipment in the cabinet. Non-Patent Document 1 proposes that the heat is exchanged while the gas is allowed to flow out from the back side to be efficiently cooled.

  FIG. 1 shows an example of a device mounted on a cabinet in the cold aisle system in the prior art. In each ICT device mounted in the cabinet, the cold aisle 103 faces in front of the front of the ICT device, and the hot aisle 102 faces in the back of the back of the ICT device. An intake port 104 is provided on the side surface of the ICT device, and a certain gap is provided between the cabinet side panel 101 and the side surface of the ICT device.

Edited by NTT Facilities Co., Ltd. “Starts sales of“ air capping ”air-conditioning air flow control product that achieves optimal temperature environment and energy saving in data center” News Release November 19, 2008, http: //www.ntt- f.co.jp /news/heisei20/h20-1119.html

  However, even when the cold aisle method is adopted, the cold aisle / hot aisle method such as the horizontal direction and the vertical direction as shown in FIG. 1, not the front-rear direction of the ICT equipment facing the cold aisle / hot aisle. When an ICT device (NW device such as a switch) that does not match the above is mounted in the cabinet, as shown in FIG. 1, the mixture of the cold air supplied from the air conditioner and the warm air exhausted by the ICT device (A) Insufficient intake / exhaust area (the opening area between the ICT device and the cabinet (shaded area) is narrow (B)) may cause a decrease in the cooling efficiency of the ICT device and an increase in heat generation load.

  For this reason, it is necessary to unify the air intake surface of the cabinet where the ICT equipment is mounted and optimize the airflow environment by installing a diffuser for ICT equipment where the intake and exhaust directions are not aligned. was there.

  In order to solve the above problems, the present invention optimizes airflow when mounting ICT equipment in a cabinet by using a diffuser for realizing high-efficiency cooling and high-density mounting, in which the intake and exhaust directions are not aligned. It aims to provide a means.

In order to achieve such an object, the present invention provides the invention according to claim 1, wherein a plurality of rectangular parallelepiped ICT devices are mounted in a cabinet so that the bottom surface and the top surface are stacked facing each other. Air flow optimization means when mounting the ICT device in the cabinet, each ICT device has an intake surface formed with a mesh-covered intake port and an exhaust surface formed with a mesh-covered exhaust port The air intake surface and the air exhaust surface are opposed to each other, and are opposed to inner walls of two side surfaces of the cabinet, respectively, and the cabinet has an air intake surface of the ICT device and a side surface of the cabinet. The cabinet has a first opening surface and a second opening surface with openings formed on two side surfaces orthogonal to the exhaust surface, and the first opening surface of the cabinet faces the cold aisle. And The second opening surface of the vignette faces the hot aisle, of the four sides of the intake surface of the ICT device, the side that contacts the top surface of the ICT device, and the side of the ICT device that faces the hot aisle Airflow toward the upper surface of each ICT device and the second opening surface of the cabinet in the space between the air intake surface of each ICT device provided on the side in contact with the inner wall of the cabinet facing the air intake surface A first diffuser that shuts off and guides the air, an exhaust surface of the ICT device and a side surface of the ICT device facing the cold aisle among four vertices of the bottom surface of the ICT device and an intake surface of the ICT device And a side of the ICT device facing the cold aisle that is in contact with the bottom surface of the ICT device, and a side of the ICT device facing the cold aisle, and a side of the ICT device facing the hot aisle Dress A side where the air intake surface of the ICT device contacts, an inner wall of the cabinet facing the air intake surface of the ICT device, and a side surface and an upper surface facing the cold aisle of another adjacent ICT device on the bottom surface side of the cabinet or the bottom surface side of the ICT device. And the first diffuser form an air intake duct having an L-shaped opening facing the cold aisle, and is in contact with the lower surface of the ICT device among the four sides of the exhaust surface of the ICT device. Each ICT device in a space between a side and an exhaust surface of each ICT device provided on a side in contact with a side surface of the ICT device facing the cold aisle and an inner wall of the cabinet facing the exhaust surface A second diffuser that blocks and guides the airflow toward the lower surface and the first opening of the cabinet, and the front of the four vertices of the bottom surface of the adjacent ICT device on the upper surface side of the ICT device On the diagonal line connecting the point where the exhaust surface of the ICT device and the side surface of the ICT device facing the cold aisle are orthogonal to the point where the air intake surface of the ICT device and the side surface of the ICT device facing the hot aisle are orthogonal The cabinet in which the rectifying plate provided, the side of the side of the ICT device facing the hot aisle that is in contact with the upper surface of the ICT device and the side of contact of the exhaust surface of the ICT device are opposed to the exhaust surface of the ICT device L that faces the hot aisle by the inner wall, the side that faces the hot aisle of the adjacent other ICT device on the top surface of the cabinet or the top surface of the ICT device, and the side that contacts the bottom surface and the second diffuser An exhaust duct having a letter-shaped opening is formed, and an opening area of the intake duct and the opening of the exhaust duct is an opening area of the inlet of the ICT device and an opening ratio of the mesh. And wherein the wider than either of the product of the aperture ratio of the mesh and the opening area of the exhaust port of the ICT device.

  The invention according to claim 2 is the airflow optimization means when the ICT device according to claim 1 is mounted on the cabinet, and the side surface facing the cold aisle of the ICT device that forms the opening of the intake duct; First and second guide vanes are provided on a side where the bottom surface is in contact and a side where a side surface and an upper surface of an adjacent ICT device facing the cold aisle are in contact with each other, and constitutes an opening of the exhaust duct. Third and fourth guide vanes are provided on the side where the side surface facing the hot aisle of the ICT device contacts the upper surface and the side where the side surface and the bottom surface of the adjacent ICT device facing the hot aisle contact each other. It is provided.

The invention according to claim 3 is the air flow optimization means when the ICT device according to claim 1 is mounted in a cabinet, and the side surface facing the cold aisle of the ICT device that forms the opening of the intake duct. A first guide vane is provided on the side that contacts the intake surface,
A second guide vane is provided on a side of the ICT device that forms the opening of the exhaust duct, the side facing the hot aisle and the side where the exhaust surface is in contact.

  As described above, according to the present invention, the design of the diffuser for airflow optimization by the diffuser to realize high-efficiency cooling and high-density mounting at the time of cabinet mounting of the ICT device whose intake and exhaust directions are not aligned. It becomes possible to provide the law.

It is a figure which shows an example of a cold aisle system in a prior art. It is a figure which shows the shielding board which rectifies | straightens the intake / exhaust direction of the ICT apparatus back and forth in the 1st Embodiment of this invention, and suppresses mixing of the cool air and warm air in a cabinet, (a) is side intake / exhaust ICT It is a figure in the case of an apparatus, (b) is a figure in the case of an up-and-down intake / exhaust ICT apparatus. It is a figure which shows the aperture ratio of the mesh of the opening part of ICT apparatus. It is a figure which shows the opening area and intake / exhaust area in the 1st Embodiment of this invention, (a) is a figure which shows the case of a horizontal intake / exhaust ICT apparatus, (b) is an up-and-down intake / exhaust ICT apparatus It is a figure which shows the case of. (A) is a figure which shows having further equipped with the baffle plate and the mounting rail in the ICT apparatus provided with the diffuser in the 2nd Embodiment of this invention, (b) is the 2nd of this invention It is a figure which shows having expanded the intake area when the intake area at the time of cabinet mounting is insufficient with respect to the apparatus design specification in embodiment. It is a figure explaining the effect of the guide vane installed in an inflow mouth in a 3rd embodiment of the present invention. (A) is a figure which shows the example of guide vane attachment to the ICT apparatus lower part in the 3rd Embodiment of this invention, (b) is to the ICT apparatus side part in the 3rd Embodiment of this invention. It is a figure which shows the example of guide vane attachment.

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

(First embodiment)
FIG. 2 shows a shielding plate that rectifies the intake / exhaust direction of the ICT device back and forth in the first embodiment of the present invention and suppresses mixing of cool air and warm air in the cabinet, and FIG. The case of an intake / exhaust ICT device is shown, and FIG. 2B shows the case of an upper / lower intake / exhaust ICT device.

  In the present invention, the shielding plate (diffuser) provided in the ICT device rectifies the intake / exhaust direction of the ICT device back and forth, and suppresses mixing of cool air and warm air in the cabinet. The space to be exhausted is shielded from being the same in the cabinet. In the case of the lateral intake / exhaust ICT device 201 shown in FIG. 2A, the intake surface is provided between the outer wall of the intake-side ICT device and the inner wall of the cabinet panel so that cold air is supplied only from the front surface 211. Shields the upper part of the side of the ICT device on the intake side and the back of the side of the ICT device in the space to be formed. In this case, the lower part of the side surface of the ICT device on the intake side is shielded by the shielding plate (intake side diffuser) of the ICT device installed in the lower stage of the cabinet, and the cold air is supplied only from the front surface 211.

  The exhaust surface is shielded by the exhaust side diffuser 202 so that the exhaust heat is exhausted only to the back surface 212, the lower part of the ICT device side surface and the front part of the ICT device side surface. The shield plate is designed and installed so that there is no gap between the cabinet side panel and the ICT equipment. In the case of an up-and-down intake / exhaust ICT device 204 as shown in FIG. 2B, both the intake and exhaust surfaces are covered with ducts, the intake surface is only the front surface 221 so that cold air is supplied only from the front surface 221, and the exhaust surface is exhaust heat. Only the back surface 222 is set as an opening so that the air is exhausted only to the back surface 222.

  Further, the diffuser needs to be designed so that the area of the opening when the diffuser and the cabinet are mounted exceeds the intake / exhaust area of the device design specification. When a shielding plate or the like is installed without satisfying this condition, the cooling efficiency of the ICT device is reduced due to a lack of necessary air volume, which may lead to an increase in temperature inside the ICT device.

  FIG. 3 shows the mesh opening ratio of the opening of the ICT device. The meshes 301 to 303 are an example of an opening mesh (reference URL http://www.punting-center.co.jp/gnav01.html).

The intake / exhaust area required by the ICT equipment is calculated based on the following formula based on the design specifications for the intake / exhaust area of the ICT equipment. As the intake / exhaust area, the smaller of the intake area and the exhaust area is adopted.
(Required intake / exhaust area of the ICT equipment) = (Open area of the intake or exhaust surface of the ICT equipment) x (Mesh opening ratio) (Equation 1)

  However, the opening area of the intake or exhaust surface of the ICT device represents the area where the mesh is installed on the side surface of the ICT device in the case of side intake and exhaust, and on the upper and lower surface of the ICT device in the case of the vertical intake and exhaust surface.

  In addition, about a mesh aperture ratio, when an exact numerical value is unknown, it is set to 0.3-0.5. In the case of honeycomb mesh, it is about 0.6.

  FIG. 4 shows the opening area and the intake / exhaust area in the first embodiment of the present invention, FIG. 4 (a) shows the case of a lateral intake / exhaust ICT device, and FIG. The case of ICT equipment is shown. 4 (a) and 4 (b) respectively show the intake / exhaust area (including the mesh opening ratio in the opening) in the apparatus design specifications, and the right views in FIGS. 4 (a) and 4 (b) respectively. The intake / exhaust area when the diffuser and cabinet are mounted is shown.

  The opening area and intake / exhaust area for a specific ICT device refer to the area shown in FIGS. 4 (a) and 4 (b). The intake / exhaust area required by the ICT device according to Equation 1 Design the shape of the diffuser to ensure That is, it is necessary to design the diffuser so that the intake / exhaust area when the diffuser and the cabinet are mounted exceeds the intake / exhaust area of the device design specification. Also, select a mounting method that can secure the space between ICT devices mounted in the cabinet so that the diffuser can be mounted.

(Second Embodiment)
5 (a) and 5 (b), in the second embodiment of the present invention, the ICT device provided with the diffuser is further provided with a rectifying plate and a mounting rail, and the intake air when the cabinet is mounted according to the device design specifications. The structure which expands an area is shown.

  The second embodiment shown in FIG. 5 (a) is the first embodiment of the present invention shown in FIG. 2, and there is an attachment portion for mounting on a cabinet or other ICT device at the lower part of the ICT device. In this case, an air inlet is provided on the lower surface of the front part of the ICT device, an opening is provided to secure an air flow between the bottom surface and the side surface of the ICT device, and the rectifier plate is directed to the air intake port on the diagonal line on the bottom surface of the ICT device. This is an installed mode.

  If the intake / exhaust area of the horizontal intake / exhaust direction ICT device is less than the device design specification when the diffuser and cabinet are mounted, the intake / exhaust area is expanded using the space above and below the ICT device as shown in FIG. At this time, a rectifying plate 503 is required to be installed on at least one of the upper and lower surfaces of the ICT device and separates the cool air and the warm air. An opening for securing the airflow is provided.

  Referring to FIG. 5 (b), the intake air from only the front side surface of the ICT device as shown in FIG. 2 cannot supply the required cold air to the ICT device, but the rectifying plate 503 shown in FIG. By using the intake air from the lower surface of the front of the ICT device, it is possible to supply the necessary cold air to the ICT device.

As a specific example, the device design specification in the left diagram of FIG.
D63.5 [cm] x H28.58 [cm] (opening size) x 0.35 (mesh opening ratio) ≒ 635.2 [cm ² ] (Formula 2)
On the other hand, the first intake area when the cabinet is mounted in the right diagram of FIG.
W12 [cm] (gap with cabinet panel) x H36 [cm] (including mounting rail height) = 432 [cm ² ] (Formula 3)
It becomes. And when installing a diffuser and expanding the intake area, the second intake area is
432 [cm ² ] (first intake area) + W44.32 [cm] x H7.42 [cm] (mounting rail height) ≒ 760.8 [cm ² ] (Formula 4)
It becomes. However, since the mounting rail has an opening, the actual intake area is
432 [cm ² ] (first intake area) +245 [cm ² ] (opening area) = 677 [cm ² ] (Formula 5)
It is. From the above, the air intake area 432 [cm ² ] when the cabinet is mounted in the right diagram in FIG. 5B is insufficient with respect to the device design specification 635.2 [cm ² ] in the left diagram in FIG. 5B. However, 677 [cm ² ] satisfies the condition when the diffuser is installed to increase the intake area.

  Even when the diffuser is mounted, for example, in the case of an ICT device with an air supply / exhaust surface in the vertical direction shown in FIG. 2B, when there is a gap between the side surface of the ICT device and the inner wall of the cabinet, etc. In order to prevent cold air and warm air from mixing through the gaps between ICT devices or between the ICT devices and the inner wall of the cabinet, a space for the ICT devices to suck in cool air or a space for the ICT devices to discharge warm air Except for the gap on the front or back of the cabinet, it is shielded with a blank panel.

(Third embodiment)
When the flow velocity flowing into the intake surface when the diffuser is mounted is high, flow resistance is formed by a vortex phenomenon that occurs in the vicinity of the inlet, and there is a possibility that a substantial intake area may not be secured. In such a case, a guide vane is designed and installed at the inlet when the cabinet is mounted for the purpose of improving the intake and exhaust efficiency.

  In FIG. 6, the figure explaining the effect of the guide vane installed in an inflow port in the 3rd Embodiment of this invention is shown. When the flow velocity is fast, the substantial suction area is reduced when there is no guide vane as shown in FIG. 6A, and when the guide vane is present as shown in FIG. The area is expanded and the intake and exhaust resistance is improved.

  The guide vane is a guide plate installed at an angle with respect to the inflow surface, and has an effect of substantially increasing the intake / exhaust area.

  FIGS. 7A and 7B show that guide vanes 701 and 702 are attached to the ICT apparatus in the second embodiment of the present invention shown in FIG. FIG. 7A shows an example of attaching the guide vane 701 to the lower part of the ICT device in the third embodiment of the present invention, and FIG. 7B shows the ICT device side in the third embodiment of the present invention. The example of the guide vane 702 attachment to a part is shown.

  However, the shape and installation method are required so as not to obstruct the insertion / extraction of the communication line, power line, and package of the horizontal and vertical intake / exhaust ICT equipment. Regarding the guide vane installation location, angle, and length, in principle, the opening shape is about 45 ° with respect to the inlet with a high flow velocity, and the length that protrudes in the inflow direction is about 3 to 5 cm. design.

  As described above, according to one aspect of the present invention, by installing a diffuser for an ICT device whose intake and exhaust directions are inconsistent, it is possible to suppress the circulation of exhaust heat in the cabinet of the ICT device and By suppressing the increase in pressure loss due to exhaust and optimizing the air flow environment in the cabinet, the cooling efficiency of the ICT device can be increased and the temperature inside the ICT device can be lowered. In addition, as an accompanying effect, an energy saving effect by relaxing the air conditioner setting as the temperature of the ICT equipment decreases, and an effect of consolidating floor space by increasing the number of units that can be mounted in the cabinet can be expected.

DESCRIPTION OF SYMBOLS 101 Cabinet side panel 102 Hot aisle 103 Cold aisle 104 Inlet 201,204,401,404 ICT apparatus 202,205,402,405,501 Exhaust side diffuser 203,206,403,406,502 Intake side diffuser 211,221, 411, 421 Front surface 212, 222, 412, 422 Rear surface 301, 302, 303 Mesh 503 Current plate 504 Mounting rail opening 601, 602 Flow path 603, 701, 702 Guide vane

Claims (3)

Airflow optimization means when mounting a plurality of rectangular ICT devices so that the bottom and top surfaces of the ICT devices are stacked facing each other in the cabinet,
Each ICT device has an intake surface formed with an intake port covered with a mesh and an exhaust surface formed with an exhaust port covered with a mesh, and the intake surface and the exhaust surface face each other. And facing the inner walls of the two side surfaces of the cabinet,
The cabinet has a first opening surface and a second opening surface of the cabinet, wherein openings are formed on two side surfaces orthogonal to the intake surface and the exhaust surface of the ICT device among the side surfaces of the cabinet. The first opening surface of the cabinet faces the cold aisle, the second opening surface of the cabinet faces the hot aisle,
Among the four sides of the intake surface of the ICT device, the side of the ICT device that is in contact with the upper surface of the ICT device, and the side of the ICT device that faces the side surface of the ICT device that faces the hot aisle, A first diffuser that blocks and guides the airflow toward the upper surface of each ICT device and the second opening surface of the cabinet in a space between the inner wall of the cabinet and the air intake surface facing each other; and a bottom surface of the ICT device Of the four vertices, the point where the exhaust surface of the ICT device and the side surface of the ICT device facing the cold aisle are orthogonal to each other and the point where the air intake surface of the ICT device and the side surface of the ICT device facing the hot aisle are orthogonal The side of the ICT device facing the cold aisle, the side where the bottom surface of the ICT device contacts the side where the bottom surface of the ICT device contacts, and the side where the suction surface of the ICT device contacts, and the suction surface of the ICT device face each other Before And cabinet inner wall, by a bottom or the ICT device bottom side of the other adjacent ICT side and the upper surface facing the cold aisle of the device is in contact sides and the first diffuser of said cabinet, facing the cold aisle Forming an air intake duct having an L-shaped opening;
Among the four sides of the exhaust surface of the ICT device, the exhaust surface of each ICT device provided on the side in contact with the lower surface of the ICT device and the side in contact with the side surface of the ICT device facing the cold aisle, A second diffuser that blocks and guides the air flow toward the lower surface of each ICT device and the first opening surface of the cabinet in a space between the cabinet and the inner wall of the cabinet facing the exhaust surface; and the upper surface side of the ICT device Among the four vertices of the bottom surface of the ICT device adjacent to each other, the exhaust surface of the ICT device and the side surface of the ICT device facing the cold aisle are orthogonal to each other, and the intake surface of the ICT device and the hot aisle a current plate side surface of the ICT device is provided on a diagonal line connecting the point orthogonal exhaust surface of the upper surface is in contact sides and the ICT device of the ICT device in a side surface of the ICT device facing the hot aisle in contact And the inner wall of the cabinet facing the exhaust surface of the ICT device, the side of the upper surface of the cabinet or the upper surface of the ICT device adjacent to the hot aisle of the adjacent ICT device and the side contacting the bottom and the first An exhaust duct having an L-shaped opening facing the hot aisle with the diffuser of 2 ;
The opening area of the opening of the intake duct and the exhaust duct is the product of the opening area of the inlet of the ICT device and the opening ratio of the mesh, and the opening area of the exhaust port of the ICT device and the opening ratio of the mesh Air flow optimization means when mounting ICT equipment in a cabinet, characterized in that it is wider than either product. The side that faces the cold aisle of the ICT device and the bottom that make up the opening of the intake duct, and the side that touches the side and the top of an adjacent ICT device that faces the cold aisle Providing first and second guide vanes;
The side that faces the hot aisle of the ICT device and the upper surface that make up the opening of the exhaust duct, and the side that touches the side and bottom of the adjacent ICT device that faces the hot aisle The third and fourth guide vanes are provided, and the airflow optimization means when the ICT device is mounted in a cabinet according to claim 1. A first guide vane is provided on a side where the side surface facing the cold aisle of the ICT device and the side of the air intake surface that form the opening of the air intake duct,
The second guide vane is provided on a side where the side surface facing the hot aisle of the ICT device and the exhaust surface that constitute the opening of the exhaust duct are in contact with each other. Airflow optimization means when mounting ICT equipment in a cabinet.

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