Electronic device

Abstract

Provided is an electronic device capable of efficiently cooling the inside of a case. An electronic device according to an embodiment includes: a case having a box shape; the pipeline is arranged in the shell and extends along a first direction; a first fan which is provided inside the housing and has a portion facing an opening in the first direction at one end of the duct; a second fan provided inside the housing, the second fan being aligned with the first fan in a second direction intersecting the first direction; and a region in which an expansion card is provided, the region being located on one side of the pipe in the second direction inside the housing. First cooling air from the first fan flows inside the duct, and a portion of the first cooling air collides with an outer surface of the duct in a third direction intersecting the first direction and the second direction. A part of the first cooling air having the collision flows into a region where the expansion card is provided.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to an electronic device. BACKGROUND

[0002] An electronic device for industrial use such as an industrial computer is assumed to operate for 24 hours 365 days, and thus it is required to shorten the maintenance time. Therefore, a component with a short life is disposed at a position inside a housing that is easy to replace. For example, a fan that cools a CPU (Central Processing Unit) that is a heat generating body, an expansion card, and the like has a short life compared to other components, and thus is disposed near a side wall inside the housing so as to be easy to replace. In addition, there are cases where a fan that cools the CPU that is a heat generating body and a fan that cools a region where the expansion card that is a heat generating body and the like are disposed are provided.

[0003] In this case, in order to efficiently cause cooling air to reach the CPU that has a large amount of heat generation and is disposed at a position away from the side wall of the housing, a duct is provided between the fan that cools the CPU and the CPU.

[0004] On the other hand, cooling air is directly blown from the fan disposed near the side wall of the housing to a relatively wide region where the expansion card and the like are disposed.

[0005] Here, generally, a fan for cooling uses a blowing type axial fan. Cooling air blown by the axial fan mainly flows linearly while swirling in a direction along a rotation center axis of the motor. Therefore, when cooling air is directly blown from the axial fan to the region where the expansion card and the like are disposed, in the region where the expansion card and the like are disposed, the amount of cooling air that reaches is distributed, and it can be impossible to perform efficient cooling.

[0006] Therefore, it is desirable to develop an electronic device that can efficiently cool the inside of a housing.

[0007] PRIOR ART DOCUMENTS

[0008] PATENT DOCUMENTS

[0009] Patent Document 1: Japanese Patent Application Publication No. 2020-080033 SUMMARY

[0010] PROBLEMS TO BE SOLVED BY THE INVENTION

[0011] The problem to be solved by the present application is to provide an electronic device that can efficiently cool the inside of a housing.

[0012] MEANS FOR SOLVING THE PROBLEMS

[0013] An electronic device according to an embodiment includes: a housing, which is box-shaped; a duct disposed inside the housing and extending along a first direction; a first fan disposed inside the housing and partially facing an opening at one end of the duct in the first direction; a second fan disposed inside the housing and arranged with the first fan in a second direction intersecting the first direction; and a region for providing an expansion card, located inside the housing on one side of the duct in the second direction. A first cooling airflow from the first fan flows inside the duct, and a portion of the first cooling airflow collides with an outer surface of the duct in a third direction intersecting both the first and second directions, and the portion of the first cooling airflow that has collided flows into the region for providing the expansion card. Attached Figure Description

[0014] Figure 1 This is a perspective view of the electronic device of this embodiment as seen from the rear panel side.

[0015] Figure 2 This is a top-down view of the electronic device when viewed from the top panel side.

[0016] Figure 3 yes Figure 2 A cross-sectional view of the electronic device along line AA.

[0017] Explanation of reference numerals in the attached figures

[0018] 1 electronic device

[0019] 2 shells

[0020] 2a Bottom Panel

[0021] 2b side panel

[0022] 2c front panel

[0023] 2D back panel

[0024] 2e top panel

[0025] 3 power supplies

[0026] 4 Storage Unit

[0027] 5. Arithmetic Unit

[0028] 6 pipes

[0029] 6a top plate

[0030] 7 expansion cards

[0031] 8 fans

[0032] 8a fan

[0033] 8b fan

[0034] 9 region

[0035] 9d bracket

[0036] 100 cooling air

[0037] 100a cooling air

[0038] 101 cooling air DETAILED DESCRIPTION

[0039] Hereinafter, embodiments will be exemplified with reference to the drawings. In addition, in each drawing, the same reference numerals are attached to the same constituent elements and detailed description is appropriately omitted.

[0040] Figure 1 is a perspective view of the electronic device 1 when viewed from the rear panel 2d side.

[0041] Figure 2 is a plan view of the electronic device 1 when viewed from the top panel 2e side.

[0042] In addition, in Figure 2 , the illustration of the top panel 2e is omitted.

[0043] Figure 3 is a sectional view of the electronic device 1 in the A-A line direction in Figure 2

[0044] In addition, arrows X, Y, Z in each drawing indicate three directions orthogonal to each other. For example, the X direction (an example of the first direction) can be set as the depth direction (front-rear direction) of the electronic device 1. For example, the Y direction (an example of the second direction) can be set as the width direction (left-right direction) of the electronic device 1. For example, the Z direction (an example of the third direction) can be set as the height direction (up-down direction) of the electronic device 1.

[0045] As shown in Figures 1-3 , the electronic device 1 is provided with, for example, a housing 2, a power supply 3, a storage section 4, an arithmetic section 5, a duct 6, an expansion card 7, and a fan 8.

[0046] The electronic device 1 is, for example, an industrial computer of a rack-mounted type. However, the electronic device 1 can be provided with only the housing 2, the arithmetic section 5, the duct 6, the expansion card 7, and the fan 8. For example, the electronic device 1 can be a desktop personal computer, an image display device, a television receiver, a game machine, an image display control device, an information storage device, or the like.

[0047] ​The housing 2 is box-shaped and has internal space for housing the power supply 3, storage unit 4, arithmetic unit 5, conduits 6, expansion card 7, and fan 8. The appearance of the housing 2 can be, for example, a roughly rectangular prism whose dimensions in the Z direction are smaller than those in the X and Y directions.

[0048] The housing 2, for example, has a bottom panel 2a, a side panel 2b, a front panel 2c, a rear panel 2d, and a top panel 2e. The bottom panel 2a, side panel 2b, front panel 2c, and rear panel 2d can be joined using fasteners such as screws and rivets, or they can be integrally formed by welding or bending. The top panel 2e can be detachably mounted to the side panel 2b, front panel 2c, and rear panel 2d, for example, using fasteners such as screws.

[0049] The bottom panel 2a may be plate-shaped and may be made of metal. Multiple convex support portions 2a1 may be provided on the outer surface of the bottom panel 2a, which is located on the outer side of the housing 2. If multiple support portions 2a1 are provided, a predetermined space can be provided between the electronic device 1 and the installation location when the electronic device 1 is placed on a shelf, table, platform, or similar installation location.

[0050] The side panel 2b is, for example, plate-shaped and may be formed of metal. A pair of side panels 2b may be arranged opposite each other in the Y direction. In the X direction, the side panel 2b is disposed between the front panel 2c and the rear panel 2d. In the Z direction, the side panel 2b is disposed between the bottom panel 2a and the top panel 2e.

[0051] The front panel 2c is, for example, box-shaped with one end open in the X direction. The front panel 2c may be made of metal, for example. In the X direction, the front panel 2c is disposed at one end of the bottom panel 2a, the side panel 2b, and the top panel 2e. In the Z direction, the front panel 2c is disposed between the bottom panel 2a and the top panel 2e.

[0052] Multiple air intakes and holes that expose the ends of the storage section 4, etc., can be provided on the front panel 2c. In addition, electrical components such as indicators and power switches can also be provided on the front panel 2c.

[0053] The rear panel 2d is, for example, plate-shaped and may be formed of metal. In the X direction, the rear panel 2d is opposite to the front panel 2c. In the Z direction, the rear panel 2d is disposed between the bottom panel 2a and the top panel 2e.

[0054] like Figure 1 As shown, on the rear panel 2d, multiple exhaust ports 2d1, holes 2d2 for exposing the exhaust ports 3a of the cooling fan mounted on the power supply 3, connectors 3b, etc., and holes 2d3 for making electrical connections with expansion cards 7, etc., can be provided.

[0055] The top panel 2e is, for example, plate-shaped and may be made of metal. The ends of both sides of the top panel 2e in the Y direction may be bent toward the bottom panel 2a.

[0056] The power supply 3 is located inside the housing 2 and supplies power to the storage unit 4, the arithmetic unit 5, the expansion card 7, and the fan 8. The power supply 3 can be located near the rear panel 2d and a side panel 2b. For example, the power supply 3 can be located inside the housing 2 in a corner in the Y direction on the rear panel 2d side.

[0057] like Figure 1 As shown, at the end of the rear panel 2d side of the power supply 3, an exhaust port 3a of the cooling fan installed inside the power supply 3, a connector 3b, etc. can be provided.

[0058] like Figure 2 As shown, at the end of the front panel 2c side of the power supply 3, a connector 3c can be provided for electrical connection with the storage unit 4, the arithmetic unit 5, the expansion card 7 and the fan 8 respectively.

[0059] Storage unit 4 is disposed inside housing 2, and may include at least one of auxiliary storage devices such as HDD (Hard Disk Drive) and SSD (Solid State Drive), and external storage devices such as ODD (Optical Disk Drive). At least one of the auxiliary storage device and the external storage device may be provided. Figure 1 and Figure 2 The illustrated electronic device 1 is provided with five HDD4a arranged in the Y direction.

[0060] The storage unit 4 can be located near the front panel 2c and a side panel 2b. For example, it can be located inside the housing 2 at a corner in the Y direction on the front panel 2c side. The storage unit 4 is positioned opposite the power supply 3 at a distance in the X direction. The storage unit 4 can be mounted on the front panel 2c, for example.

[0061] The arithmetic unit 5 is located inside the housing 2. In the Y direction, the arithmetic unit 5 is located between the power supply 3, the storage unit 4, and the expansion card 7.

[0062] like Figure 3 As shown, the arithmetic unit 5 includes, for example, an electronic component 5a such as a CPU mounted on the substrate and a heat sink 5b disposed on the electronic component 5a. The electronic component 5a and the heat sink 5b are disposed between the fan 8a (an example equivalent to the first fan) and the rear panel 2d, and between the pipe 6 and the bottom panel 2a.

[0063] The duct 6 is provided inside the housing 2. The duct 6 is, for example, cylindrical, and can be formed of metal. The duct 6 extends in the X direction. The duct 6 guides, for example, a portion of the cooling air 100 (corresponding to an example of the first cooling air) from the fan 8a and a portion of the cooling air 101 (corresponding to an example of the second cooling air) from the fan 8b (corresponding to an example of the second fan) to the heat sink 5b. In the X direction, the end portions of both sides of the duct 6 are open. The opening of the duct 6 on the rear panel 2d side opposes the plurality of exhaust ports 2dl provided to the rear panel 2d.

[0064] As shown in FIG. 1, the opening of the duct 6 on the front panel 2c side is larger in size than the opening of the duct 6 on the rear panel 2d side in the Y direction. Figure 1 As shown in FIG. 1, the opening of the duct 6 on the front panel 2c side is larger in size than the opening of the duct 6 on the rear panel 2d side in the Z direction. Figure 2 Figure 3 As shown in FIG. 1, the opening of the duct 6 on the front panel 2c side is larger in size than the opening of the duct 6 on the rear panel 2d side in the Z direction.

[0065] As shown in FIG. 1, the duct 6 has, for example, a top panel 6a, a side panel 6b, a side panel 6c, a bottom panel 6d, and an air direction panel 6e. Figures 1-3

[0066] The top panel 6a is plate-shaped, and extends in the X direction substantially in parallel with the bottom surface panel 2a. The edge of the top panel 6a on the power supply 3 and storage portion 4 side extends linearly in the X direction. The edge of the top panel 6a on the expansion card 7 side extends in the X direction, and is inclined toward the fan 8b side in the vicinity of the end portion on the front panel 2c side.

[0067] The side panel 6b is plate-shaped, and extends in the X direction along the edge of the top panel 6a on the power supply 3 and storage portion 4 side. In the Z direction, the size of the side panel 6b on the front panel 2c side is larger than the size of the side panel 6b on the rear panel 2d side. The edge between the vicinity of the end portion of the side panel 6b on the front panel 2c side and the portion of the side panel 6b opposing the heat sink 5b (electronic component 5a) is inclined.

[0068] The side panel 6c is plate-shaped, and opposes the side panel 6b. The side panel 6c extends in the X direction along the edge of the top panel 6a on the expansion card 7 side. In the Z direction, the size of the side panel 6c on the front panel 2c side is larger than the size of the side panel 6c on the rear panel 2d side. The edge between the vicinity of the end portion of the side panel 6c on the front panel 2c side and the portion of the side panel 6c opposing the heat sink 5b (electronic component 5a) is inclined.

[0069] As shown in FIG. 1, the duct 6 has, for example, a top panel 6a, a side panel 6b, a side panel 6c, a bottom panel 6d, and an air direction panel 6e. Figure 3 As shown in FIG. 1, the duct 6 has, for example, a top panel 6a, a side panel 6b, a side panel 6c, a bottom panel 6d, and an air direction panel 6e. ​​

[0070] Furthermore, the base plate 6d extends in the X direction along the edge of the bottom panel 2a side of the side plates 6b and 6c. Therefore, the base plate 6d has an inclined surface that slopes toward the top plate 6a side.

[0071] like Figure 3 As shown, the airflow vane 6e is plate-shaped and is disposed inside the duct 6. The airflow vane 6e is disposed on the side of the bottom panel 2a of the top plate 6a. The vicinity of the end of the airflow vane 6e is inclined toward the radiator 5b (electronic component 5a).

[0072] As described later, a portion of the cooling air 100 from fan 8a and a portion of the cooling air 101 from fan 8b are introduced into the interior of duct 6 through an opening on the front panel 2c side. The cooling air 100 and 101 introduced into the interior of duct 6 flows towards the top plate 6a via the inclination of the bottom plate 6d. The cooling air 100 and 101 flowing inside duct 6 have their flow direction changed by the inclination of the airflow vane 6e towards the heat sink 5b (electronic component 5a). Therefore, cooling air 100 and 101 can be efficiently supplied to the heat sink 5b (electronic component 5a), thus enabling efficient cooling of electronic component 5a.

[0073] Region 9 is located inside housing 2 on one side of pipe 6 in the Y direction. An expansion card 7, etc., is provided in region 9. For example, such as... Figure 1 and Figure 2 As shown, region 9 can be defined as the area inside the housing 2 located between the pipe 6 and the side panel 2b.

[0074] A substrate 9a can be installed in region 9. The substrate 9a can be installed on the bottom panel 2a of the housing 2. Multiple expansion slots 9b can be installed on the substrate 9a. The multiple expansion slots 9b can be arranged at predetermined intervals in the Y direction, for example. In addition, electronic components such as a PCH (Pplatform Controller Hub) 9c can be installed on the substrate 9a.

[0075] like Figure 1 and Figure 2 As shown, expansion card 7 is located in region 9. Expansion card 7 is installed in expansion slot 9b located on substrate 9a. Expansion card 7 is, for example, a RAID (Redundant Arrays of Inexpensive Disks) card.

[0076] The size of the expansion card 7 can be any of the full-size, short-size, or low-profile cards under the PCI or PCIe standards. Figures 1-3 The illustrated expansion card 7 is full-size. Additionally, in Figure 1 andFigure 2 In the present embodiment, as an example, a case where one full-size RAID card is provided is illustrated, but the size, number, and function of the expansion card 7 can be appropriately changed as needed.

[0077] In addition, as Figures 1-3 indicated, a bracket 9d can be provided in the region 9. The bracket 9d can be provided, for example, to the front panel 2c of the housing 2. The bracket 9d is, for example, plate-shaped, and can be formed of metal. The bracket 9d is bent toward the bottom panel 2a side from the rear panel 2d side. The bent surface 9dl of the bracket 9d is, for example, opposed to the rear panel 2d. A plurality of grooves 9d2 can be provided on the bent surface 9dl. The plurality of grooves 9d2 are arranged at a predetermined interval in the Y direction. The pitch size and number of the plurality of grooves 9d2 can be, for example, the same as the pitch size and number of the plurality of expansion slots 9b.

[0078] When the full-size expansion card 7 is installed in the expansion slot 9b, the end portion of the expansion card 7 is inserted into the inside of the groove 9d2. Thus, the full-size expansion card 7 is supported by the bracket 9d.

[0079] The fan 8 introduces air of the environment in which the electronic device 1 is provided into the inside of the housing 2. The fan 8 can be, for example, a blow-type axial fan. A plurality of fans 8 can be provided in the inside of the housing 2.

[0080] As Figure 1 and Figure 2 indicated, the fan 8a and the fan 8b are provided in the electronic device 1. The fan 8a and the fan 8b are provided in the vicinity of the front panel 2c in the inside of the housing 2. The fan 8b can be arranged in the Y direction from the fan 8a. As described above, a plurality of air inlets are provided on the front panel 2c. Thus, the fan 8a and the fan 8b can introduce air into the inside of the housing 2 via the plurality of air inlets provided on the front panel 2c. The air flow introduced into the inside of the housing 2 by the fan 8a and the fan 8b becomes the cooling air 100 and the cooling air 101.

[0081] A portion of the fan 8a is opposed to the opening of the end portion of the front panel 2c side of the duct 6. The fan 8a mainly introduces air into the inside of the duct 6. The fan 8a mainly cools the operation unit 5 (the electronic component 5a, the heat sink 5b) via the duct 6.

[0082] The fan 8b is opposed to the region 9. The fan 8b mainly introduces air into the region 9. The fan 8b mainly cools the electronic component provided in the region 9, such as the expansion card 7, the PCH 9c, and the like.

[0083] Here, the cooling air 100, 101 blown by the blow-type axial fans of the fans 8a, 8b mainly flows linearly while swirling in the direction along the rotational center axis of the motor.

[0084] As described above, since the air deflector 6e is provided inside the duct 6, even if the cooling air 100 flowing straight while swirling from one side of the fan 8a is introduced into the inside of the duct 6, the cooling air 100 flowing inside the duct 6 can be efficiently guided to the heat sink 5b (the electronic component 5a) by the air deflector 6e.

[0085] On the other hand, when the cooling air 101 flowing straight while swirling from the fan 8b is introduced into the area 9, the cooling air 101 can be supplied to the expansion card 7, the PCH 9c, and the like provided in the direction along the rotation center axis of the motor of the fan 8b, but it is difficult to supply the cooling air 101 to the expansion card 7 and the electronic component from the position shifted from the direction along the rotation center axis of the motor to the Y direction. For example, it is difficult to supply the cooling air 101 from the fan 8b to the vicinity of the side surface panel 2b of the area 9. Therefore, in the area 9, the amount of the cooling air 101 reaching is distributed, and it can be impossible to perform efficient cooling in the area 9, and further, impossible to perform efficient cooling in the inside of the housing 2.

[0086] Therefore, in the electronic device 1 of the present embodiment, a part of the cooling air 100 blown from the fan 8a flows into the area 9 from the direction intersecting the direction along the rotation center axis of the motor of the fan 8b.

[0087] As shown in Figs. 1 and 2, the fan 8a is provided in the duct 6. The fan 8a is provided in the duct 6 so as to blow the cooling air 100 in the Z direction. The cooling air 100 blown from the fan 8a flows straight while swirling from one side of the fan 8a. Figure 1 Figure 3 As shown in Figs. 1 and 2, the fan 8a is provided in the duct 6. The fan 8a is provided in the duct 6 so as to blow the cooling air 100 in the Z direction. The cooling air 100 blown from the fan 8a flows straight while swirling from one side of the fan 8a.

[0088] In this way, the cooling air 100 from the fan 8a flows inside the duct 6, and as shown in Fig. 2, a part of the cooling air 100 collides with the outer surface (the top panel 6a) in the Z direction of the duct 6. In the area of the outer surface of the duct 6, which is collided by a part of the cooling air 100, the pressure of the air becomes high. Therefore, a part of the collided cooling air 100 flows out from the collided area, and becomes the cooling air 100a flowing into the area 9 in which the expansion card 7 and the like are provided. Figure 1

[0089] Further, as shown in Fig. 2, in the Z direction, if the top panel 6a of the duct 6 is more on the bottom surface panel 2a side than the end portion of the top surface panel 2e side of the bracket 9d, it is easy to make the cooling air 100a flowing into the area 9 reach the expansion card 7. Therefore, it is easy to cool the expansion card 7 with the cooling air 100a. Figure 3 As shown in Fig. 2, the fan 8b is provided in the area 9. The fan 8b is provided in the area 9 so as to blow the cooling air 101 in the Y direction. The cooling air 101 blown from the fan 8b flows straight while swirling from one side of the fan 8b.

[0090] Figure 1 ​​​As shown, the cooling air 100a flowing into the region 9 flows into the region 9 from a direction intersecting the direction (for example, the X direction) along the center axis of rotation of the motor of the fan 8b. Therefore, it is possible to supply the cooling air 100a to a region where it is difficult to supply the cooling air 101 from the fan 8b. If the cooling air 100a is supplied to a region where it is difficult to supply the cooling air 101, it is possible to suppress the distribution of the amount of the cooling air that reaches in the region 9. Therefore, it is possible to achieve efficient cooling in the region 9, and further, to achieve efficient cooling of the inside of the housing 2.

[0091] In addition, if the position at which a portion of the cooling air 100 collides with the ceiling 6a of the duct 6 is close to the region 9, it is possible to increase the amount of the cooling air 100a flowing into the region 9. Therefore, it is possible to further suppress the distribution of the amount of the cooling air that reaches in the region 9.

[0092] For example, as shown in FIG. 6, in a case where the region 9 is disposed on the right side of the duct 6 as viewed from the blowing-out side of the fan 8a, it is preferable to make the direction of rotation of the blades of the fan 8a clockwise (right-handed). In this way, as shown in FIG. 7, it is possible to make the position at which a portion of the cooling air 100 collides with the ceiling 6a of the duct 6 close to the region 9. Therefore, compared to a case where the direction of rotation of the blades of the fan 8a is counterclockwise (left-handed), it is possible to increase the amount of the cooling air 100a flowing into the region 9. Figure 1 Figure 1 For example, as shown in FIG. 6, in a case where the region 9 is disposed on the right side of the duct 6 as viewed from the blowing-out side of the fan 8a, it is preferable to make the direction of rotation of the blades of the fan 8a clockwise (right-handed). In this way, as shown in FIG. 7, it is possible to make the position at which a portion of the cooling air 100 collides with the ceiling 6a of the duct 6 close to the region 9. Therefore, compared to a case where the direction of rotation of the blades of the fan 8a is counterclockwise (left-handed), it is possible to increase the amount of the cooling air 100a flowing into the region 9.

[0093] In addition, as shown in FIG. 8, in a case where the region 9 is disposed on the left side of the duct 6 as viewed from the blowing-out side of the fan 8a, it is preferable to make the direction of rotation of the blades of the fan 8a counterclockwise (left-handed). In this way, it is possible to make the position at which a portion of the cooling air 100 collides with the ceiling 6a of the duct 6 close to the region 9. Therefore, compared to a case where the direction of rotation of the blades of the fan 8a is clockwise (right-handed), it is possible to increase the amount of the cooling air 100a flowing into the region 9.

[0094] That is, according to the positional relationship between the duct 6 and the region 9 as viewed from the blowing-out side of the fan 8a, it is possible to select the fan 8a that makes the blades rotate in an appropriate direction.

[0095] In this case, if a portion of the cooling air 100 collides with the ceiling 6a of the duct 6, the amount of the cooling air 100 flowing inside the duct 6 decreases accordingly. If the amount of the cooling air 100 flowing inside the duct 6 decreases, the amount of the cooling air 100 that reaches the heat sink 5b (the electronic component 5a) decreases in some cases, and the cooling effect of the electronic component 5a decreases.

[0096] Therefore, in the electronic device 1 of the present embodiment, as shown in FIG. 9, the direction of rotation of the blades of the fan 8a is made clockwise (right-handed) in a case where the region 9 is disposed on the right side of the duct 6 as viewed from the blowing-out side of the fan 8a. Figure 1 Figure 2 ​​​​​​​​​​The opening on the front panel 2c side of the duct 6 is opposed to a portion in the Z direction of the fan 8a and a portion in the Y direction of the fan 8b.

[0097] In this case, as described above, if the size of the opening on the front panel 2c side of the duct 6 in the Y direction is larger than the size of the opening on the rear panel 2d side of the duct 6, the opening on the front panel 2c side of the duct 6 is easily opposed to a portion of the fan 8a and the fan 8b in the Y direction.

[0098] If the opening on the front panel 2c side of the duct 6 is opposed to a portion in the Y direction of the fan 8b, a portion of the cooling air 101 from the fan 8b can be introduced into the inside of the duct 6. That is, the cooling air 101 from the fan 8b flows in the region 9, and a portion thereof flows in the inside of the duct 6.

[0099] Therefore, the amount of the cooling air 100 reduced by making a portion of the cooling air 100 collide with the top panel 6a of the duct 6 can be supplemented with the cooling air 101 introduced into the inside of the duct 6 from the fan 8b. As a result, even if a portion of the cooling air 100 is made to collide with the top panel 6a of the duct 6, the reduction in the cooling effect of the electronic component 5a can be suppressed.

[0100] The above describes several embodiments of the present application, but these embodiments are presented as examples and are not intended to limit the scope of the application. These new embodiments can be implemented in other various ways, and various omissions, substitutions, changes, and the like can be made within the scope of the gist of the application. These embodiments and their modifications are included in the scope and gist of the application, and are included in the scope of the application and its equivalents described in the claims. In addition, the above-described embodiments can be implemented in combination with each other.

Claims

1. An electronic device, comprising: Possessing: a housing that is box-shaped; a duct that is provided inside the housing and extends in a first direction; a first fan that is provided inside the housing and a portion thereof opposes an opening of one end portion of the duct in the first direction; a second fan that is provided inside the housing and is arranged in a second direction that intersects the first direction with the first fan; and a region in which an expansion card is provided, which is located on one side of the duct in the second direction inside the housing; first cooling air from the first fan flows inside the duct, and a portion of the first cooling air collides with an outer surface of the duct in a third direction that intersects the first direction and the second direction, and a portion of the first cooling air that has collided flows into the region in which the expansion card is provided.

2. The electronic device according to claim 1, characterized in that a portion of the second fan opposes the opening of one end portion of the duct in the first direction, second cooling air from the second fan flows in the region in which the expansion card is provided, and a portion of the second cooling air flows inside the duct.

3. The electronic device according to claim 1 or 2, characterized in that the first fan is a blow-type axial fan, from a blow-out side of the first fan, in a case where the region in which the expansion card is provided is configured on a right side of the duct, a rotation direction of a blade of the first fan is clockwise, and in a case where the region in which the expansion card is provided is configured on a left side of the duct, the rotation direction of the blade of the first fan is counterclockwise.

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