JP2009064203A - Noise reduction structure for rack cabinet system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a noise reduction structure for achieving the noise reduction of a rack mount server system only by exchanging the opening and closing door of an existing rack cabinet. <P>SOLUTION: An opening and closing door accessory to a rack cabinet is of a variable type with a freely changeable opening ratio, and a direct sound to be issued by a device is interrupted by adjusting the opening ratio according to a device installation environment, so that noise reduction can be achieved. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a noise reduction technique for a rack mount server system.

  It is a well-known fact that semiconductors used in electronic devices, especially semiconductors represented by CPUs of information processing devices, have been evolving rapidly, and the amount of heat generation and density has been increasing. As the amount of heat generated by the device increases, the noise value of the device tends to increase due to the increase in the number of fans mounted for cooling or the number of rotations.

  In recent years, the rack mount system has become mainstream in the system configuration, storage, and installation of information processing apparatuses such as servers. The rack-mount system is a system in which devices with each function are stacked in a rack cabinet that is formed based on specific standards. Each device can be freely selected and arranged, and the system configuration is flexible and expanded. There is an advantage that the entire system can be reduced in size.

  In particular, 19-inch rack cabinets stipulated in the IEC standard (International Electrical Commission) / EIA standard (The Electrical Industries Association) are the mainstream in server-related fields, and the left and right front dimensions of the column for mounting the device are 451 mm, The height dimension for mounting is defined in units of 1U (1EIA) = 44.45 mm.

  However, as described above, the noise of the unit itself is on the rise, so the noise of the entire rack system when it is mounted in multiple stages in the rack cabinet becomes very large, and it is used in a room other than a specialized room for a controlled computer room. Is in a difficult situation.

Japanese Unexamined Patent Publication No. 2000-277756

  Regarding noise reduction when the apparatus is mounted in multiple stages in the rack cabinet, for example, as disclosed in Japanese Patent Application Laid-Open No. 2000-277956, a dedicated air duct is provided in the rack to improve the exhaust efficiency in the rack cabinet and the air duct. Some have a sound absorbing material inside to reduce noise.

  However, providing an air duct in a limited space in the rack leads to an increase in the size of the rack cabinet, and complicating the air flow path leads to an increase in flow resistance and, in turn, an increase in pressure loss. There is concern about the decline.

  In addition, since a dedicated rack cabinet is required, application to an existing rack cabinet is impossible, and there is a point in terms of versatility.

  In order to solve the above problems, in the present invention, the opening of the open / close door associated with the rack cabinet is made variable, the opening ratio is adjusted as necessary, and a direct sound typified by the wind noise of the fan emitted from the server is obtained. To reduce.

  According to the present invention, in a rack mount server system equipped with an information processing apparatus such as a server, it is possible to reduce noise by simply replacing the open / close door of an existing rack cabinet.

  Hereinafter, a rack cabinet system according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a general view of a variable silent door for realizing the present invention. This variable silent door has a double structure in which a door 1 and an auxiliary plate 2 are attached to the door 1.
The door 1 has an arbitrary opening 4, and the auxiliary plate 2 has an opening 5 that is different from or has the same shape as the opening 4.

  FIG. 2 is a side view of the variable silent door realizing the present invention when the aperture ratio is maximum. The auxiliary plate 2 is movable, and in the cross-sectional view of the variable silent door shown in FIG. 2, the opening portion is maximized when the opening portions of the door portion 1 and the auxiliary plate 2 coincide.

  FIG. 3 is a side view of the variable silent door realizing the present invention when the aperture ratio is minimum. When there is a margin in cooling conditions due to ambient temperature conditions or the like, the auxiliary plate 2 is operated to close the opening of the door portion 1 as shown in FIG. At this time, the direct sound emitted from the device is cut by 100%. When a problem occurs in the cooling performance by closing the opening, the opening ratio is increased. The shape of the opening is not limited to this.

  The operation control unit of the auxiliary plate 2 incorporates a system in which the auxiliary plate 2 automatically operates so as to achieve a preset aperture ratio based on information from a sensor that senses the ambient temperature. In an environment where the ambient temperature is low and the cooling conditions are not strict, the aperture ratio is decreased, and in an environment where the cooling conditions are strict, the aperture ratio is automatically increased.

  FIG. 4 shows an example of an operation system of the auxiliary plate 2. The auxiliary plate 2 is connected to the motor 8 via the operating column 10 and has a structure in which the operating column 10 is rotated by the motor 8 according to the temperature acquired by the temperature sensor 9 and the auxiliary plate 2 is operated up and down.

  FIG. 5 is a side view of the silent door mounted on the rack cabinet. This variable silent door is effective for both the front and rear doors of the rack cabinet. In FIG. 5, the variable silent door is installed as both front and rear doors of the rack cabinet body 3.

  The effect of the variable silent door mounting will be described with reference to FIGS. 6 and 7 which are enlarged views of the openings 4 and 5. FIG. FIG. 6 shows a case where the opening portions of the door portion 1 and the auxiliary plate 2 are completely inconsistent and the opening ratio is minimized. In this case, since the direct sound 6 emitted from the device group 7 mounted on the rack mount is blocked by the silent door 1, leakage to the outside of the rack cabinet is prevented and noise is reduced. When the cooling condition is severe by closing the opening, it can be dealt with by changing the opening ratio as shown in FIG.

  For example, even in an environment where the temperature of the rack cabinet installation environment changes, such as cooling during daytime and stopping at nighttime, the control shown in FIG. 8, for example, according to the temperature acquired by the temperature sensor of the auxiliary plate 2 By setting the table in advance, the auxiliary plate 2 can be automatically controlled.

The variable silent door whole view which implement | achieves this invention. The side view when the aperture ratio of the variable silent door which implement | achieves this invention is the maximum. The side view when the aperture ratio of the variable silent door which implement | achieves this invention is the minimum. An example of an auxiliary plate operating system. The block diagram at the time of attaching a variable type silent door to a rack cabinet. The enlarged view of the opening part in the variable silent door side view shown by FIG. The enlarged view of the opening part at the time of changing an aperture ratio. Automatic control table example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Door part of a variable silent door 2 Variable silent door auxiliary plate 3 Rack cabinet main body 4 Door part opening part 5 Auxiliary board opening part 6 Direct sound flow 7 Server apparatus group 8 Motor 9 Temperature sensor 10 Operation pillar 11 Rotation direction

Claims (2)

  In the noise reduction structure of the rack cabinet system that reduces the noise of the server mounted on the rack cabinet by the rack cabinet opening / closing door, the rack cabinet opening / closing door having the first opening has a second corresponding to the first opening. A silent structure for a rack cabinet system, in which a movable auxiliary plate having an opening is provided, and the opening ratio of the first opening and the second opening is changed by operating the auxiliary plate.   2. The noise reduction structure for a rack cabinet system according to claim 1, wherein operation control of the auxiliary plate is automatically performed so that an opening ratio set in advance according to the ambient temperature.

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