JP2019191221A - Noise absorption device - Google Patents

Abstract

To shorten a distance between two electronic devices having fans.SOLUTION: A noise absorption device 22 comprises a first device 24 and a second device 26. The first device 24 and the second device 26 respectively comprise: fans 42; suction ports 38 and exhaust ports 40 of wind generated by the fans 42; and electronic components 48 arranged inside. The exhaust port 40 of the first device 24 opposes the suction port 38 of the second device 26 by leaving a gap 34, and the first device 24 and the second device 26 are supported by supporting members. The noise absorption device comprises a sound absorption member 50 arranged in the gap 34. The sound absorption member 50 comprises: a first opening 64 communicated to the exhaust port 40 of the first device 24; and a second opening 66 communicated to the suction port 38 of the second device 26. Wind does not pass but a part of sound transmits between the first device 24 and the second device 26.SELECTED DRAWING: Figure 1

Description

  The technology disclosed in the present application relates to a sound absorbing device.

  A rectifier is provided in the buffer space formed in the upper half of the fan unit provided in the casing of the device, and a sound absorbing material is provided on the surface of the rectifier to absorb the noise generated by the cooling fan. There is a noise prevention device for electronic equipment.

JP-A-4-214699

  There is an electronic device having a structure in which a fan is provided and wind generated by the fan is passed from an inlet to the inside and discharged from the outlet. In a structure in which two (or three or more) such electronic devices are arranged and fixed along the wind flow direction, a partition plate that is inclined with respect to the arrangement direction of the electronic devices is provided between the electronic devices. For example, a wind intake path from the front side of the device to the inflow port of one electronic device and a wind discharge path from the outflow port of the other electronic device to the back side are formed.

  In order to prevent the sound generated by the fan from leaking outside the electronic device, for example, a structure in which a sound absorbing material is attached to the partition plate described above can be employed. However, since the sound absorbing material has a predetermined thickness, the suction path and the discharge path are narrowed, and the wind speed is increased. In order to reduce the wind speed, the cross-sectional area of the suction path and the discharge path may be increased, but this also increases the distance between the two electronic devices.

  An object of the disclosed technique of the present application is to shorten the distance between two electronic devices including a fan as one aspect.

  The technology disclosed in the present application includes a first device and a second device each including a fan, an air inlet and an air outlet of the wind generated by the fan, and an electronic component disposed inside. A support member is provided that supports the first device and the second device with the exhaust port of the first device and the intake port of the second device facing each other with a gap therebetween. In addition, a first opening that is disposed in the gap and communicates with the exhaust port of the first device and a second opening that communicates with the intake port of the second device are provided, and the wind does not pass between the first device and the second device. A part of the sound has a sound absorbing member that transmits the sound.

  With the technology disclosed in the present application, the distance between two electronic devices each including a fan can be shortened.

FIG. 1 is a longitudinal sectional view showing the sound absorbing device of the first embodiment together with the flow of wind. FIG. 2 is a perspective view showing a first device of the sound absorbing device of the first embodiment. FIG. 3 is a perspective view showing a sound absorbing member of the sound absorbing device of the first embodiment. FIG. 4 is a longitudinal sectional view showing a sound absorbing member of the sound absorbing device of the first embodiment. FIG. 5 is a longitudinal sectional view showing the sound absorbing device of the first embodiment together with sound transmission. FIG. 6 is a longitudinal sectional view showing a sound absorbing device of a comparative example together with the flow of wind. FIG. 7 is a longitudinal sectional view showing a sound absorbing device of a comparative example together with transmission of sound. FIG. 8 is a longitudinal sectional view showing a sound absorbing member of the sound absorbing device of the second embodiment. FIG. 9 is a longitudinal sectional view showing a sound absorbing member of the sound absorbing device of the third embodiment.

  The sound absorbing device of the first embodiment will be described in detail based on the drawings.

  As shown in FIG. 1, the sound absorbing device 22 includes a first device 24, a second device 26, and a rack member 28. In the drawing, the depth direction of the frame member 28 is indicated by an arrow D, and the upward direction is indicated by an arrow U.

 The rack member 28 is an example of a support member. 1 includes a pedestal 30 installed on an installation surface (for example, an indoor floor surface), and a plurality of support columns 32 erected upward from the pedestal 30. Yes. In the example shown in FIG. 1, there are two support columns 32, and the first device 24 and the second device 26 are fixed to and supported by the rack member 28 between the two support columns 32. . In the present embodiment, the first device 24 is located on the lower side, the second device 26 is located on the upper side, and a gap 34 is generated between the first device 24 and the second device 26. The member which fixes the 1st apparatus 24 and the 2nd apparatus 26 to the support pillar 32 is not specifically limited, A screw, a hook, etc. can be used.

  Hereinafter, the terms “front side” and “rear side” mean the front side and the rear side in the depth direction, respectively. In a state where the first device 24 and the second device 26 are supported by the gantry 30, the width direction (arrow W direction) of the first device 24 and the second device 26 coincides with the width direction of the gantry 30.

  As shown in FIG. 2, the first device 24 has a housing 36. One or a plurality of fans 42 are provided inside the housing 36. By driving the fan 42, a wind flow is generated inside the housing 36 as indicated by an arrow F2 in FIG.

  The housing 36 is formed with an intake port 38 through which the wind generated by the fan 42 flows into the housing 36 and an exhaust port 40 through which the wind flows out of the housing 36 to the outside. In a state where the first device 24 is fixed to the gantry 30, the air inlet 38 is on the lower side and the air outlet 40 is on the upper side, and the wind flows from the bottom to the top in the housing 36.

  A plurality of servers 44 are mounted on the housing 36 above the fan 42. The server 44 has a substrate 46 (see FIG. 1), and each of the substrates 46 is arranged in the housing 36 so as to be aligned along the width direction (arrow W direction) of the first device 24. . Each of the servers 44 can be inserted into and removed from the housing 36 in the depth direction (the direction of arrow D and the opposite direction).

  Various electronic components 48 are mounted on the substrate 46 of the server 44. Air (wind) that flows into the housing 36 from the air inlet 38 by driving the fan 42 flows from the bottom to the top in the housing 36 and receives heat from the electronic component 48. Thereby, the electronic component 48 is cooled. And the wind which received the heat of the electronic component 48 flows further upwards, and is discharged | emitted from the exhaust port 40. FIG.

  As shown in FIG. 1, in the present embodiment, the fan 42 is located on the lower side inside the housing 36. The fan 42 is disposed on the intake port 38 side in the first device 24 and the second device 26.

  In the present embodiment, the second device 26 also includes a housing 36, a fan 42, and a substrate 46, and various electronic components 48 are mounted on the substrate 46. The first device 24 and the second device 26 may have different specific structures, arrangements, numbers, and the like of the fan 42, the substrate 46, and the electronic component 48. In FIG. 1, for convenience, the first device 24 and the second device 26 are illustrated as substantially the same structure.

  A sound absorbing member 50 is disposed in the gap 34 between the first device 24 and the second device 26. As shown in FIGS. 3 and 4, the sound absorbing member 50 includes a holding member 51 and a sound absorbing material main body 54. Further, the holding member 51 has a frame member 52 and a holding plate 56. In the example shown in FIG. 4, two holding plates 56 are provided in parallel, and the sound absorbing material main body 54 is sandwiched and held between these holding plates 56.

  The frame member 52 is a rectangular frame-shaped member surrounding the gap 34, and includes a front plate 52F positioned on the front side, a rear plate 52R positioned on the rear side, and horizontal plates 52S positioned on both sides in the width direction. ing. The frame member 52 is made of, for example, metal or resin, and is a member that has high sound insulation between the inside and the outside (it is difficult for sound to pass through).

  A first opening 64 is formed between the lower portion of the rear plate 52R, that is, the first device 24, and a second opening 66 between the upper portion of the front plate 52F, that is, the second device 26. Is formed. The first opening 64 and the second opening 66 are located on opposite sides of the frame member 52.

  As shown in FIG. 1, the sound-absorbing material body 54 and the holding plate 56 are inclined from the second device 26 side to the first device 24 side between the upper end of the first opening 64 and the lower end of the second opening 66. Are arranged as follows. In other words, the sound-absorbing material main body 54 and the holding plate 56 are inclined downward from the rear side toward the front side.

  The first opening 64 communicates with the exhaust port 40 of the first device 24, and the second opening 66 communicates with the intake port 38 of the second device 26. That is, the first opening 64 is an outlet for wind from the first device 24, and the second opening 66 is an inlet for wind to the second device 26. However, the exhaust port 40 and the intake port 38 are partitioned by the rear plate 52R, the front plate 52F, and the sound absorbing material main body 54.

  The sound-absorbing material main body 54 is a plate-like member that does not allow wind (gas) to pass in the thickness direction but absorbs sound at a predetermined sound absorption rate and transmits sound that is not absorbed in the thickness direction. As described above, since the exhaust port 40 and the intake port 38 are partitioned by the rear plate 52R, the front plate 52F, and the sound absorbing material body 54, the wind flows between the first device 24 and the second device 26. do not do. However, since the sound absorbing material main body 54 transmits a part of the sound, the sound is partially absorbed between the first device 24 and the second device 26, and the sound transmitted without being absorbed is transmitted. Reach the previous device. For example, the sound in the first device 24 passes through the sound absorbing material body 54 and reaches the second device 26. The sound in the second device 26 passes through the sound absorbing material body 54 and reaches the first device 24.

  The sound-absorbing material main body 54 is not limited as long as it is a member that does not pass gas in the thickness direction and absorbs sound with a predetermined sound absorption rate (partially transmits). For example, a porous material having a predetermined porosity or a fibrous member (such as glass wool or rock wool) can be used. The sound-absorbing material main body 54 is a lighter member than the first device 24 and the second device 26 regardless of the structure using any material.

  The holding plate 56 is a flat plate-like member that holds the sound-absorbing material body 54 and maintains a desired shape and position. In this embodiment, the holding plate 56 is a metal or resin mesh material, and the mesh material itself has a large number of holes (through holes) in the thickness direction, so that sound can be transmitted in the thickness direction. It is.

  As the holding plate 56, in addition to the net material, for example, a metal or resin plate material can be used. In the holding plate 56 using a plate material, a structure in which sound can be transmitted in the thickness direction can be realized by providing a structure having a plurality of through holes that penetrate the plate material in the thickness direction. As an example of a structure in which a through hole is provided in a plate material in this way, a lattice material or a punching metal can be exemplified.

  In the present embodiment, the holding plate 56 is a member thinner than the sound absorbing material body 54, and the holding plate 56 has little influence (not thickened) on the thickness of the sound absorbing member 50.

  In the present embodiment, the holding plate 56 is fixed to the frame member 52. Therefore, the sound-absorbing material main body 54 is fixed at a predetermined position with respect to the frame member 52 via the holding plate 56.

  An introduction member 68 is disposed below the first device 24. The introduction member 68 is a plate-like member that is inclined so as to approach the first device 24 from the front side toward the rear side, and an introduction opening 70 is formed on the front side. By driving the fan 42 of the first device 24, the air on the front side of the first device 24 is introduced from the introduction opening 70 and guided to the intake port 38. In the introduction member 68, a sound absorbing material 72 is attached to the surface (upper surface) on the first device 24 side.

  A discharge member 74 is arranged on the upper side of the second device 26. The discharge member 74 is a plate-like member that is inclined so as to be separated from the second device 26 from the front side toward the rear side, and a discharge opening 76 is formed on the rear side. When the wind inside the second device 26 is exhausted from the exhaust port 40 by driving the fan 42 of the second device 26, this wind is guided to the exhaust opening 76. In the discharge member 74, a sound absorbing material 78 is attached to the surface (lower surface) on the second device 26 side.

  Next, the operation of this embodiment will be described.

  As the fan 42 of the first device 24 and the second device 26 is driven, wind flows from the introduction opening 70 into the housing 36 through the intake port 38 as indicated by an arrow F1 in FIG. Further, this wind flows in the housing 36 as indicated by the arrow F2, and the electronic component 48 in the first device 24 is cooled. The wind that has received heat from the electronic component 48 of the first device 24 flows from the exhaust port 40 of the first device 24 to the first opening 64 (wind outlet) as shown by the arrow F3, and outside the sound absorbing member 50. Exhausted.

  A sound absorbing member 50 is disposed in the gap 34 between the first device 24 and the second device 26. Since the sound absorbing material body 54 of the sound absorbing member 50 is a member through which wind does not pass, the wind does not travel between the first device 24 and the second device 26. In the first device 24, the wind received from the electronic component 48 does not flow to the second device 26, and the wind introduced from the second opening 66 to the second device 26 does not flow to the first device 24. The electronic component 48 can be efficiently cooled in the 24 and the second device 26.

  The sound-absorbing material main body 54 absorbs part of the sound, but transmits part of the sound that has not been absorbed. As an example, FIG. 5 shows a state where sound generated in the second device 26 (mainly sound generated by the fan 42) is transmitted. The sound generated by the fan 42 spreads downward and upward as indicated by arrows S1 and S2. Below the second device 26, sound passes through the sound absorbing material body 54 and reaches the first device 24.

  Various members inside the first device 24 and the second device 26, such as the electronic component 48, are members that are heavier (larger in mass) than the sound absorbing material body 54. Sound is relatively easily reflected by a heavy member, and is easily transmitted or absorbed by a light member.

  Accordingly, the sound transmitted from the second device 26 through the sound absorbing material body 54 is reflected and attenuated inside the first device 24. Then, the attenuated sound passes through the sound-absorbing material main body 54 again and returns to the second device 26 as indicated by an arrow S3.

  In this way, the sound in the second device 26 passes through the sound absorbing material body 54 and is attenuated by the first device 24, and returns to the second device 26. Note that a part of the sound transmitted upward in the second device 26 passes through the exhaust opening 76 from the upper exhaust port 40 to the outside as indicated by an arrow S4. In addition, a part of the sound transmitted downward in the second device 26 passes through the second opening 66 from the intake port 38 to the outside as indicated by an arrow S5. However, since there is a sound that passes through the sound-absorbing material main body 54 and is attenuated by the first device 24, the sound that goes out to the outside is small as a whole.

  Similarly, the sound generated in the first device 24 passes through the sound absorbing material body 54 and is attenuated by the second device 26, and returns to the first device 24.

  Thus, in this embodiment, a part of the sound in the first device 24 and the second device 26 is attenuated by the second device 26 and the first device 24 through the sound-absorbing material main body 54. Then, while the sound is attenuated, the sound travels between the first device 24 and the second device 26 and is further attenuated.

  Here, FIGS. 6 and 7 show a sound absorbing device 122 of a comparative example. In the sound absorbing device 122 of the comparative example, a sound absorbing member 126 different from that of the first embodiment is disposed in the gap 124 between the first device 24 and the second device 26.

  In the sound absorbing member 126 of the comparative example, a separator 128 that isolates the exhaust port 40 of the first device 24 and the intake port 38 of the second device 26 is provided. The separator 128 is a member that does not allow air to pass between the first device 24 and the second device 26 and does not transmit sound.

  In the sound absorbing device 122 of the comparative example, the sound of the first device 24 and the second device 26 reaches the transmission destination member and is not attenuated. The material 130 is affixed. FIG. 7 shows how sound generated in the second device 26 is transmitted in the comparative example. The sound generated by the fan 42 is transmitted downward and upward as indicated by arrows S6 and S2. However, in the comparative example, sound does not pass through the sound absorbing member 126. Therefore, even if the sound transmitted downward is absorbed by the sound absorbing material 130, the sound that escapes to the outside (see arrow S6 in FIG. 7) is larger than that in the first embodiment (see arrow S5 in FIG. 5).

  Moreover, in the comparative example, when the opening cross-sectional areas of the first opening 64 and the second opening 66 are narrowed by the sound absorbing material 130, the wind speed increases. In order to suppress such an increase in the wind speed, it is necessary to increase the opening height of the first opening 64 and the second opening 66 to increase the opening cross-sectional area. However, when the opening heights of the first opening 64 and the second opening 66 are increased, the height H2 of the sound absorbing member 126 is also increased, so that the distance between the first device 24 and the second device 26 is also increased.

  In contrast, in the sound absorbing device 22 of the present embodiment, as described above, part of the sound in the first device 24 and the second device 26 is transmitted through the sound absorbing material body 54 and attenuated by the transmission destination member. Absorb. For this reason, the sound-absorbing material main body 54 can be made thinner compared to a structure in which a similar sound-absorbing effect is obtained by sound absorption by the sound-absorbing material. By reducing the thickness of the sound absorbing member 50, the distance between the first device 24 and the second device 26 (height H1 of the gap 34, see FIG. 5) can be shortened.

  For example, when the heat generation amount of the electronic component 48 is large, the air blowing capacity of the fan 42 is increased or the fan 42 is installed in a plurality of stages to increase the air pressure and increase the air volume in order to cool the electronic component 48 reliably. Structure may be adopted. Even with such a structure, in the sound absorbing device 22 of the present embodiment, the opening height of the first opening 64 and the second opening 66 can be secured high, so that the fan 42 is maintained while maintaining the cooling effect of the electronic component 48. The sound generated from can be absorbed.

  Further, since the distance between the first device 24 and the second device 26 is short, the degree of freedom of the mounting positions of the first device 24 and the second device 26 with respect to the rack member 28 is high. That is, an extra space is generated below the first device 24 and above the second device with respect to the rack member 28 having a predetermined height. For this reason, even when the sound absorbing member 50 is updated or changed with the replacement of the first device 24 or the second device 26, the position adjustment of the first device 24 or the second device 26 with respect to the rack member 28 is easy. It is easy to secure a mounting space for the first device 24 and the second device 26 with respect to the rack member 28.

  In addition, when adopting a structure in which not only the first device 24 and the second device 26 but also three or more devices are stacked in the vertical direction, the overall height of a plurality of devices stacked can be reduced to a predetermined height. A large number of devices that can be stacked within this range can be secured.

  As described above, the sound absorption rate of the sound absorption member 50 is not limited as long as a part of the sound can be transmitted. For example, the lower limit of the sound absorption rate can be set by the following method.

  The case where the sound of the first device 24 passes through the sound absorbing member 50 and reaches the second device 26, and a part of the sound attenuated by the second device 26 further passes through the sound absorbing member 50 and returns to the first device 24. Think. In this case, if the magnitude of the sound that returns is 50% or less of the magnitude of the original sound, the sound absorption effect is high. Further, it is considered that, for example, about 10% of sound leakage occurs from the intake port 38 of the first device 24 and the exhaust port 40 of the second device 26. This “sound volume” is, for example, a sound pressure that can be measured using a sound level meter.

  Considering these, the sound absorption rate of the sound absorbing member 50 (the ratio of the magnitude of sound absorbed) is set to 25%. For example, assuming that the volume of sound generated downward in the second device 26 is 1, the volume of sound transmitted through the sound absorbing member 50 is 1 × (1−0.25) = 0.75. In the first device 24, considering the sound leakage of about 10% as described above, the magnitude of the reflected sound in the first device 24 is 0.75-0.1 = 0.65. When this sound is further absorbed by the sound absorbing member 50 located on the upper side when viewed from the first device 24, the volume of the sound becomes 0.65 × (1−0.25) = 0.49. That is, if the sound absorption rate of the sound absorbing member 50 is 25% or more, the sound absorbing member 50 is transmitted from the second device 26 and reflected by the first device 24, and the sound absorbing member 50 is transmitted again and returned to the second device 26. The loudness can be reduced to 50% or less. This sound is reflected by the second device 26, passes through the sound absorbing member 50, reaches the first device 24, and attenuates while reciprocating between the second device 26 and the first device 24. And the sound newly generated in the 2nd apparatus 26 is attenuate | damped, reciprocating between the 1st apparatuses 24 similarly.

  The sound absorption rate of the sound absorbing member 50 is such that, for example, a sound with a frequency of 1 kHz or more and 5 kHz or less is audibly annoying, so that the above sound absorption rate is satisfied for a sound with a frequency of 1 kHz or more and 5 kHz or less. It is preferable.

  Further, the upper limit of the sound absorption rate of the sound absorbing member 50 is not limited from the above viewpoint, but if the thickness of the sound absorbing material body 54 is increased in order to increase the sound absorption rate, the height H1 of the sound absorbing member 50 increases. Therefore, from the viewpoint of keeping the height H1 of the sound absorbing member 50 low, the upper limit of the sound absorption rate of the sound absorbing member 50 can be set to 50%, for example.

  The structure of the sound absorbing member 50 is not limited to the above-described structure, and for example, the structures listed in the following embodiments can be adopted. In the following embodiments, elements, members, and the like that are the same as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. In addition, since the overall structure of the sound absorbing device in each of the following embodiments is the same as that of the sound absorbing device of the first embodiment, illustration is omitted.

  FIG. 8 shows a sound absorbing member 84 in the sound absorbing device 82 of the second embodiment. The sound absorbing member 84 of the second embodiment has one holding plate 56 and a sound absorbing material main body 54. Then, the holding plate 56 holds the sound absorbing material main body 54 on one side (the upper surface in the example shown in FIG. 8) side of the sound absorbing material main body 54.

  In the sound absorbing device 82 of the second embodiment, since the holding plate 56 is one, it is possible to make the sound absorbing member 84 lighter compared to a structure in which the holding plate 56 is two.

  By providing the holding plate 56, it is possible to suppress the sound absorbing material body 54 from being deformed by wind pressure or the like. Thus, if the deformation of the sound-absorbing material main body 54 can be suppressed, the holding plate 56 preferably has a minimum structure. Further, if the surface of the sound absorbing material main body 54 is rough, there is a high possibility that the sound absorbing material body 54 becomes wind resistance or generates sound. Secure. Even in this case, since the sound-absorbing material body 54 can be made thin, it is easy to design the sound-absorbing member 84 to be thin.

  In the sound absorbing member 50 of the first embodiment, the sound absorbing material main body 54 is sandwiched between the two holding plates 56. By holding the sound-absorbing material main body 54 in a compressed state with the two holding plates 56, the sound absorption rate of the sound-absorbing material main body 54 can be set to a predetermined value. And since the sound-absorbing material body 54 having a predetermined sound absorption rate is compressed in this way, the sound-absorbing material body 54 can be made thinner, and the sound-absorbing member 50 can be made thinner.

  FIG. 9 shows a sound absorbing member 94 in the sound absorbing device 92 of the third embodiment. In the sound absorbing member 94 of the third embodiment, the sound absorbing material bodies 54A and 54B are held on both surfaces (upper surface and lower surface) of one holding plate 56. In the third embodiment, the materials and properties of the two sound absorbing material bodies 54 can be made different.

  In each of the embodiments described above, the sound absorbing member has the holding member 51 and the sound absorbing material main body 54. Since the sound absorbing material body 54 is held by the holding member 51, the shape and position of the sound absorbing material body 54 can be maintained.

  In the third embodiment, there is no need to further retain plate-like members (the sound absorbing material main bodies 54A and 54B) on the lower surface of the lower sound absorbing material main body 54A or the upper surface of the upper sound absorbing material main body 54B. May also be provided). By providing such a plate-like member, it is possible to hold the sound-absorbing material main bodies 54A and 54B in a compressed state.

  Further, since the holding plate 56 is a plate-like member, the sound absorbing material main body 54 can be maintained in a plate-like state. Since the through hole is formed in the holding plate 56, sound can be transmitted, and a structure that does not hinder the passage of sound between the first device 24 and the second device 26 can be realized.

  The holding plate 56 may be made of resin, for example, but if it is made of metal, it is possible to suppress deterioration over time, and the effect of maintaining the shape at the position of the sound absorbing material main body 54 is high.

  The sound absorbing members 50, 84, 94 have a frame member 52. The frame member 52 surrounds the sound absorbing material main body 54 in the gap 34 between the first device 24 and the second device 26. Therefore, it can suppress that the sound which permeate | transmits the sound-absorbing material main body 54 between the 1st apparatus 24 and the 2nd apparatus 26 leaks outside.

  The frame member 52 includes a first opening 64 and a second opening 66. Even if the frame member 52 surrounds the sound-absorbing material body 54, the first opening 64 can form a wind outlet for the first device 24. Similarly, the second opening 66 can form a wind inlet to the second device 26.

  In the frame member 52, the first opening 64 and the second opening 66 are located on opposite sides. Therefore, the wind outlet from the first device 24 and the wind inlet to the second device 26 can be positioned on opposite sides, and the exhaust from the first device 24 and the intake air into the second device 26 are Can be separated on the opposite side.

  Thus, in the frame member 52 having the first opening 64 and the second opening 66, the sound absorbing material main body 54 moves from the second device 26 side to the first device 24 side as it goes from the first opening 64 to the second opening 66. Inclined to. For example, the height of the first opening 64 and the second opening 66 can be secured higher than that of the structure in which the sound absorbing material body 54 is not inclined in this way and is parallel (horizontal) to the intake port 38 and the exhaust port 40. . That is, it is possible to suppress an increase in the flow velocity of the wind, which can ensure a wide opening cross-sectional area of the wind outlet from the first device 24 and the wind inlet to the second device 26. Further, since the sound absorbing material body 54 is inclined in this way, the exhaust from the exhaust port 40 of the first device 24 and the intake air to the intake port 38 of the second device 26 are bent at a right angle or an acute angle. It does not flow, it turns and flows at an obtuse angle. Thereby, generation | occurrence | production of the sound at the time of a wind hitting the sound-absorbing-material main body 54 can be suppressed.

  In a state where the first device 24 and the second device 26 are supported by the rack member 28, the fan 42 is positioned on the lower side of each of the first device 24 and the second device 26. Inside the first device 24 and the second device 26, the electronic component 48 is often disposed below the housing 36. In this case, the distance from the fan 42 to the electronic component 48 is determined by the fan 42. Since it is close to the structure located on the upper side, the electronic component 48 can be efficiently cooled.

  The fan 42 may be positioned on the upper side of each of the first device 24 and the second device 26 in a state where the first device 24 and the second device 26 are supported by the rack member 28. In this case, since the air flows so as to be drawn from the air inlet 38 toward the fan 42, the inside of the first device 24 and the second device 26 can be cooled more evenly.

  In each of the above embodiments, the fan 42 is disposed on the intake port 38 side in the first device 24 and the second device 26. Therefore, in the structure having the air inlet 38 below the first device 24 and the second device 26, the air can be sucked by the fan 42 near the air inlet 38.

  In the sound absorbing devices 22, 82, and 92 of each of the above embodiments, the structure of the rack member is not limited to the above. For example, a rack that is formed in a box shape and in which the first device 24 and the second device 26 are accommodated may be used. In this case, the front side of the rack can be opened and closed by the door, and the first device 24 and the second device 26 can be accessed by the operator.

  The sound absorbing devices 22, 82, and 92 of each of the above embodiments are installed, for example, in an installation room (for example, a server room) that can supply conditioned air maintained at a desired temperature and humidity. Therefore, the installation room is partitioned by the front side portion and the rear side portion of the sound absorbing devices 22, 82, 92, and the conditioned air is supplied to the front side portion, and the rear side of the sound absorbing devices 22, 82, 92 is provided. A structure may be adopted in which air (air received from the electronic component 48) is discharged from the portion. Further, depending on the installation room, there is a structure in which the air-conditioned air is allowed to flow in the lower part of the floor. In such an installation room, the air-conditioned air supplied from the lower floor portion may flow from the second opening 66 of the sound absorbing device 22, 82, 92.

  In each of the embodiments described above, the first device 24 and the second device 26 include, for example, a processor as the electronic component 48, and further includes an electronic device that performs various processes on electrical signals, including a memory, an input / output port, and the like. Devices and communication devices can be exemplified. Furthermore, as the first device 24 and the second device 26, for example, a photoelectric conversion device that performs various processing by converting an optical signal and an electronic signal, an optical signal processing device that performs various processing on an optical signal, and the like. Can be mentioned. Since the sound absorbing devices 22, 82, and 92 include these electronic devices, communication devices, photoelectric conversion devices, optical signal processing, and the like, it can be said that these are collectively electronic devices. And in the structure where these electronic devices, communication devices, photoelectric conversion devices, optical signal processing, etc. are stacked in a plurality of stages in the vertical direction, the internal electronic components can be efficiently cooled, the gap between the devices can be reduced, and the whole It can contribute to the low profile as.

  The embodiments of the technology disclosed in the present application have been described above. However, the technology disclosed in the present application is not limited to the above, and can be variously modified and implemented in a range not departing from the gist of the present invention. Of course.

The present specification further discloses the following supplementary notes regarding the above embodiments.
(Appendix 1)
A first device and a second device, each comprising a fan, an air inlet and an air outlet of the wind generated by the fan, and electronic components disposed inside,
A support member that supports the first device and the second device with the exhaust port of the first device and the intake port of the second device facing each other with a gap therebetween;
A first opening that is disposed in the gap and communicates with the exhaust port of the first device and a second opening that communicates with the intake port of the second device, and is between the first device and the second device. And a sound absorbing member through which a part of the sound is transmitted without passing through the wind,
A sound absorbing device.
(Appendix 2)
The sound absorbing device according to appendix 1, wherein the sound absorbing member has a sound absorption rate of 25% or more.
(Appendix 3)
The sound absorbing member is
A sound-absorbing material main body that transmits a part of the sound without passing the wind between the first device and the second device;
A holding member for holding the sound absorbing material body;
The sound absorbing device according to Supplementary Note 1 or Supplementary Note 2, wherein
(Appendix 4)
The holding member is
A holding plate to which the sound absorbing material body is attached;
A plurality of through holes penetrating the holding plate in the thickness direction;
The sound-absorbing device according to Supplementary Note 3, wherein
(Appendix 5)
The sound absorbing device according to appendix 4, wherein the holding plate is made of metal.
(Appendix 6)
The sound absorbing device according to appendix 4 or appendix 5, wherein the sound absorbing material body is held between a plurality of parallel holding plates.
(Appendix 7)
The holding member is
The sound absorbing device according to any one of supplementary notes 3 to 6, further comprising a frame member surrounding the sound absorbing material main body in the gap.
(Appendix 8)
The first opening serves as a wind outlet between the sound absorbing material body and the first device, and the second opening serves as a wind inlet between the sound absorbing material body and the second device. The sound absorbing device according to appendix 7, formed on the frame member.
(Appendix 9)
The sound absorbing device according to appendix 8, wherein the first opening and the second opening are located on opposite sides of the frame member.
(Appendix 10)
The sound absorbing device according to appendix 9, wherein the sound absorbing material body is inclined from the second device side to the first device side as it goes from the first opening to the second opening.
(Appendix 11)
The sound absorbing device according to any one of Supplementary Note 1 to Supplementary Note 10, wherein the first device and the second device are supported by the support member so that the fan is positioned on a lower side.
(Appendix 12)
The sound absorbing device according to any one of supplementary notes 1 to 11, wherein the fan is disposed on the intake port side in the first device and the second device.

22 sound absorbing device 24 first device 26 second device 28 frame member (an example of a support member)
34 Gap 38 Inlet 40 Outlet 42 Fan 48 Electronic component 50 Sound absorbing member 51 Holding member 52 Frame member 54 Sound absorbing material body 56 Holding plate 64 First opening 66 Sound absorbing device 84 Sound absorbing member 92 Sound absorbing device 94 Sound absorbing member

Claims (4)

A first device and a second device, each comprising a fan, an air inlet and an air outlet of the wind generated by the fan, and electronic components disposed inside,
A support member that supports the first device and the second device with the exhaust port of the first device and the intake port of the second device facing each other with a gap therebetween;
A first opening that is disposed in the gap and communicates with the exhaust port of the first device and a second opening that communicates with the intake port of the second device, and is provided between the first device and the second device. And a sound absorbing member through which a part of the sound is transmitted without passing through the wind,
A sound absorbing device. The sound absorbing member is
A sound-absorbing material main body that transmits a part of the sound without passing the wind between the first device and the second device;
A holding member for holding the sound absorbing material body;
The sound absorbing device according to claim 1, comprising: The holding member is
A holding plate to which the sound absorbing material body is attached;
A plurality of through holes penetrating the holding plate in the thickness direction;
The sound-absorbing device according to claim 2.   The sound absorbing device according to claim 3, wherein the sound absorbing material body is held between a plurality of parallel holding plates.