JP2008257459A - Information processor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an information processor for lightening weight, and for cooling a plurality of heating bodies, and for making it unnecessary to provide any screw for fixing a cooling fan, and for increasing the degree of freedom of the layout of the component mounting of a printed circuit board. <P>SOLUTION: This information processor 1 is provided with; a casing 2 having an opening 18; a printed circuit board 20 housed in the casing 2; a heat generation element 25 mounted on one face 21 of the printed circuit board 20; a cooling fan 50 installed at one face 21 of the printed circuit board 20; and a duct member 30 mounted on one face 21 of the printed circuit board 20, and equipped with a first end 31 and a second end 32. The duct member 30 covers the heating body 25 and at least a portion of cooling fan 50, and the first end 31 of the duct member 30 and the printed circuit 20 form a first duct opening 41 facing the opening 18 of the casing 2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an information processing apparatus including a duct member that cools a heating element inside a casing, and more specifically, includes a duct member that cools a heating element such as a CPU mounted on the surface of a printed circuit board inside the casing. The present invention relates to an information processing apparatus.

  In an information processing apparatus such as a rack server or a personal computer, a heating element such as a CPU is usually mounted on the surface of a printed board. The CPU needs to be cooled because it cannot fully exhibit its performance if it generates excessive heat.

  As a cooling device for cooling a heating element in an information processing apparatus, for example, Patent Document 1 (Japanese Patent Laid-Open No. 2001-148589) discloses a cooling duct with a cooling fan that cools a heating element mounted on the surface of a printed circuit board. There is disclosed a duct body that has a duct body that communicates with an opening for blowing air on a wall surface of the housing and a cooling fan that is accommodated in the duct body, and the duct body can be expanded and contracted or bent.

According to the cooling device disclosed in Patent Document 1, a heating element such as an electronic component located at the tip of the duct body can be efficiently cooled in a spot manner.
JP 2001-148589 A

  The cooling device disclosed in Patent Document 1 has a problem that it cannot cool a heating element that is not located at the tip of the duct body. Further, the cooling device disclosed in Patent Document 1 has a problem that the duct main body is a dedicated component separate from the casing, and thus becomes heavier than the duct main body.

  The present invention has been made in view of the above circumstances, can reduce the weight and resource saving of the duct member, can cool a large number of heating elements on the printed circuit board, and has screws or the like for fixing the cooling fan. An object of the present invention is to provide an information processing apparatus that is unnecessary, has a high degree of freedom in layout of component mounting on a printed circuit board, and can be mounted at high density.

  An information processing apparatus according to the present invention solves the above-described problems, and includes a housing having an opening, a printed circuit board accommodated in the housing, and heat generated on one surface of the printed circuit board. A duct member having a first end and a second end, mounted on the one surface of the printed circuit board, and a cooling fan provided on the one surface side of the printed circuit board The duct member covers the heating element and at least a part of the cooling fan, and the first end of the duct member and the printed circuit board are directed to the opening of the housing. The first duct opening is formed.

  Duct members can be reduced in weight and resources can be saved, many heating elements on the printed circuit board can be cooled, screws are not required for fixing the cooling fan, and the degree of freedom in layout of printed circuit board component mounting is high. High-density mounting is possible.

  An information processing apparatus according to the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an external appearance of an information processing apparatus according to the present invention.

  The information processing apparatus 1 shown in FIG. 1 is an example of a rack server that can be installed in a server rack, but may be an information processing apparatus such as a personal computer body of a desktop personal computer other than the rack server.

  As shown in FIG. 1, the information processing apparatus 1 includes a box-shaped housing 2 and a rack mounting portion 71.

  The housing 2 includes a front panel 11, housing side surface portions 12 and 14 that form both side surfaces of the housing 2, a housing back surface portion 13 that is disposed to face the front panel 11, and a housing top surface portion 15. And the bottom surface portion 16 of the housing.

  On the front panel 11, an insertion type HDD (hard disk drive) 65, FDD (floppy disk drive) 66, CD (compact disk) drive 67 and tape device 68 are arranged. The front panel 11 is provided with a front opening 17 for taking in air for cooling the inside of the housing 12.

  The rack mounting portion 71 is provided on the front side of the housing side surface portion 12 and the housing side surface portion 14. The rack mounting portion 71 is provided with a mounting hole 72 through which a screw or the like is inserted, so that the information processing apparatus 1 can be mounted on a rack (not shown) using the screw or the like.

  FIG. 2 is a perspective view showing the housing top surface portion 15 of the information processing apparatus 1 by cutting away.

  As shown in FIG. 2, a printed circuit board 20 is disposed on the housing bottom surface portion 16 inside the housing 2.

  A heating element (not shown) is mounted on one surface 21 of the printed circuit board 20, and a cooling fan (not shown) is provided. A duct member 30 is placed on the one surface 21 so as to cover the heating element and the cooling fan. Implemented. The duct member 30 does not necessarily need to cover all of the cooling fans as long as it functions as a duct, and may be provided so as to cover a part thereof.

  An opening 18 is provided in the housing back surface portion 13 of the housing 2. The duct member 30 has a first end 31 that is one end in the ventilation direction connected to the opening 18, and a second end 32 that is the other end in the ventilation direction opens into the housing 2. Is done. The information processing apparatus 1 can ventilate the inside and outside of the housing 2 through the duct member 30.

  FIG. 3 is a perspective view showing the duct member.

  As shown in FIG. 3, the duct member 30 has a substantially U-shaped crossing made up of rectangular side plates 33, 34 disposed opposite to each other and a rectangular top plate 35 connecting the side plates 33, 34 to each other. A channel-shaped member having a surface.

  In the duct member 30, an air passage 37 having a substantially U-shaped cross section is formed in a portion surrounded by the side plates 33 and 34 and the top plate 35.

  As for the duct member 30, the 1st end part 31 and the 2nd end part 32 are the open ends of a ventilation direction.

  In the duct member 30, the end surface 43 of the side plate 33 and the end surface 44 of the side plate 34 are open ends perpendicular to the ventilation direction.

  In the duct member 30, the end face 43 of the side plate 33 and the end face 44 of the side plate 34 are brought into contact with one surface 21 of the printed circuit board 20, so that the open end in the vertical direction of the ventilation direction is closed, and the ventilation path 37 is formed in a cross-sectionally B shape.

  In the duct member 30, a concave portion 60 that accommodates a part of a casing of a cooling fan (not shown) is provided on an inner wall 38 that forms the ventilation path 37.

  The recess 60 is provided at a predetermined distance (symbol D in FIG. 3) from the first end 31 of the duct member 30.

  The duct member 30 is provided with a guide groove 39 that engages with an engagement piece (not shown) of the casing 2 on the outer surface of the side plates 33 and 34.

  4 is a cross-sectional view taken along line AA in FIG.

  As shown in FIG. 4, the printed circuit board 20 is fixed to the bosses 22 protruding from the inner surface of the housing bottom surface portion 16 with screws 23. The printed circuit board 20 is provided with an insertion hole (not shown), and the printed circuit board 20 is fixed to the housing bottom surface portion 16 by inserting a screw 23 into the insertion hole.

  A CPU 25 as a heating element is mounted on one surface 21 of the printed circuit board 20.

  The duct member 30 is mounted on the one surface 21 of the printed circuit board 20 with the end surface 43 of the side surface plate 33 and the end surface 44 of the side surface plate 34 in contact with the one surface 21 of the printed circuit board 20 so as to cover the CPU 25. . That is, the CPU 25 is accommodated in the ventilation path 37 of the duct member 30.

  When the duct member 30 comes into contact with one surface 21 of the printed circuit board 20, the ventilation path 37 has a substantially rectangular cross section, and the first end portion 31 of the duct member 30 and the printed circuit board 20 form a housing. A first duct opening 41 having a square cross section directed to the opening 18 of the body 2 is formed.

  Further, when the duct member 30 is brought into contact with one surface 21 of the printed circuit board 20, the ventilation path 37 has a substantially rectangular cross section, and the second end portion 32 of the duct member 30 and the printed circuit board 20 A second duct opening 42 having a square cross section oriented in a direction different from the opening 18 of the housing 2 is formed.

  A cooling fan 50 is provided on one surface 21 side of the printed circuit board 20.

  The cooling fan 50 includes a box-shaped cooling fan casing 51 and a fan main body 52 disposed in the cooling fan casing 51.

  In the cooling fan 50, the lower portion 53 of the casing 51 of the cooling fan is placed on the one surface 21 of the printed circuit board 20, and the upper portion and the periphery of the side surface of the casing 51 of the cooling fan are the recessed portions 60 of the duct member 30. Provided in support.

  The cooling fan 50 is provided in the ventilation path 37 of the duct member 30 and between the opening 18 of the housing 2 and the CPU 25.

  Duct member 30 is mounted on one surface 21 of printed circuit board 20 so as to cover cooling fan 50. That is, the cooling fan 50 is accommodated in the ventilation path 37 of the duct member 30.

  FIG. 5 is a perspective view showing a state where the housing 2 and the duct member 30 are separated. 6 is a cross-sectional view taken along line BB in FIG. In FIG. 6, the fan body 52 of the cooling fan 50 is not shown.

  As shown in FIGS. 5 and 6, the housing 2 has an engagement piece 19 on the inner surface side of the opening 18. The engagement piece 19 is formed in a base portion 28 projecting from the inner surface side of the housing back surface portion 13 of the housing 2 and a guide groove 39 refracted from the tip of the base portion 28 and provided in the side plates 33 and 34 of the duct member 30. It is a claw-like projection having a leading end portion 29 to be guided.

  The duct member 30 loosely fits the guide groove 39 to the distal end portion 29 of the engagement piece 19 of the housing 2 and moves in the direction of the arrow X in FIG. 5 so that the end surfaces 43 and 44 of the side plates 33 and 34 are printed. It abuts on one surface 21 of the substrate 20.

  The duct member 30 is fixed to the one surface 21 of the printed circuit board 20 by restricting the movement away from the one surface 21 of the printed circuit board 20 by other claw-like protrusions (not shown).

  Next, the operation of the information processing apparatus 1 will be described with reference to the drawings.

  When the information processing apparatus 1 is used, the CPU 25 as a heating element generates heat, and the inside of the housing 2 becomes high temperature. Here, when the cooling fan 50 operates, air is sucked into the ventilation path 37 from the second duct opening 42 of the duct member 30 (arrow F in FIGS. 4 and 6) and the first duct opening 41. (The arrow G in FIGS. 4 and 6), and the CPU 25 in the ventilation path 37 of the duct member 30 is cooled.

  When the inside of the housing 2 becomes negative pressure by the air blowing in the directions of arrows F and G, air is taken into the housing 2 in the direction of arrow E from the front opening 17 of the front panel 11 shown in FIG.

  According to the information processing apparatus 1, since the duct member 30 is not in a pipe shape but in a channel shape, the weight reduction and resource saving of the duct member 30 can be achieved.

  According to the information processing apparatus 1, the open end of the channel-shaped duct member 30 is brought into contact with one surface 21 of the printed circuit board 20 to form the ventilation path 37 surrounded by the duct member 30 and the printed circuit board 20. Many components that are in the ventilation path 37 and are mounted on the one surface 21 of the printed circuit board 20 can be cooled.

  According to the information processing apparatus 1, the cooling fan 50 is regulated and fixed between the recess 60 provided in the duct member 30 and the one surface 21 of the printed circuit board 20. Etc. are unnecessary, and the installation work is easy.

  According to the information processing apparatus 1, since screws or the like are not necessary for fixing the cooling fan 50, the layout of the component mounting of the printed circuit board 20 is highly flexible and high-density mounting is possible.

  That is, in the case of the conventional information processing apparatus in which the cooling fan 50 is attached to the one surface 21 of the printed circuit board 20 with screws or the like, the screw insertion holes for fixing the cooling fan 50 provided on the one surface 21 of the printed circuit board 20. For this reason, there is a problem in that the space for mounting components on the printed circuit board 20 is reduced, the degree of freedom of layout is limited, and high-density mounting of components is difficult.

  On the other hand, the information processing apparatus 1 does not need to be provided with a screw insertion hole for fixing the cooling fan 50 in the printed circuit board 20, so that the space for mounting components on the printed circuit board 20 is increased and the degree of freedom in layout is increased. High-density mounting of parts is possible.

  According to the information processing apparatus 1, the mounting position of the cooling fan 50 can be easily changed by changing the formation position of the recess 60 of the duct member 30.

  According to the information processing apparatus 1, the duct member 30 can be easily attached to the housing 2 by loosely fitting the guide groove 39 of the duct member 30 to the distal end portion 29 of the engagement piece 19 of the housing 2.

  According to the information processing apparatus 1, since the heating element 25 is disposed in the ventilation path 37 of the duct member 30, the cooling efficiency of the heating element 25 is high.

  According to the information processing apparatus 1, the recess 60 is formed so as to be separated by a predetermined distance between the recess 60 of the duct member 30 and the opening 18 of the housing 2, whereby the operating sound of the cooling fan 50 is processed. It becomes difficult to leak out of the apparatus 1, and noise reduction is possible.

  The information processing apparatus 1 may provide a plurality of the recesses 60 of the duct member 30 at a predetermined interval in the ventilation direction of the duct member 30. When a plurality of the recesses 60 are provided, it is easy to change the mounting position of the cooling fan 50 to the duct member 30.

  The information processing apparatus 1 may attach a cover (not shown) that can be ventilated to the opening 18 of the housing back surface part 13. If the cover which can ventilate is attached, the cooling fan 50 can be protected.

  The information processing apparatus 1 is an example in which the opening 18 is provided in the housing back surface portion 13, but the opening 18 may be provided in the housing side surface portions 12, 14 and the like. With this configuration, it is possible to effectively use the space of the case side surfaces 12 and 14.

  The information processing apparatus 1 is an example in which the air in the housing 2 is discharged from the opening 18, but the air in the housing 2 may be configured to be sucked from the opening 18. With this configuration, fresh air can be supplied to the heating element 25.

  The information processing apparatus 1 may arrange the heating element 25 outside the ventilation path 37 of the duct member 30. With this configuration, the degree of freedom of component mounting of the printed circuit board 20 can be increased.

The perspective view which shows the external appearance of the information processing apparatus which concerns on this invention. 1 is a perspective view showing an information processing apparatus according to the present invention with a part cut away. The perspective view which shows a duct member. Sectional drawing in alignment with the AA of FIG. The perspective view which shows the state which the housing | casing and the duct member isolate | separated. Sectional drawing which follows the BB line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Information processing apparatus 2 Housing | casing 11 Front panel 12 Housing | casing side surface part 13 Housing | casing back surface part 14 Housing | casing side surface part 15 Housing | casing top surface part 16 Housing | casing bottom face part 17 Front opening part 18 Opening part 19 Engagement piece 20 Printed circuit board 21 One surface 22 of the printed board 22 Boss 23 Screw 25 Heating element 28 Engagement piece base 29 Engagement piece tip 30 Duct member 31 Duct member first end 32 Duct member second end 33, 34 Duct member side plate 35 Duct member top plate 37 Ventilation channel 38 Duct member inner wall 39 Guide groove 41 First duct opening 42 Second duct opening 43, 44 End surface 50 of duct member on the side of ventilation channel opened Cooling fan 51 Cooling fan casing 52 Cooling fan fan body 60 Recess 65 HDD (Hard disk drive)
66 FDD (floppy disk drive)
67 CD (compact disc) drive 68 Tape device 71 Rack mounting portion 72 Mounting hole

Claims (6)

A housing having an opening;
A printed circuit board housed in the housing;
A heating element mounted on one surface of the printed circuit board;
A cooling fan provided on the one surface side of the printed circuit board;
A duct member mounted on the one surface of the printed circuit board and having a first end and a second end;
The duct member covers the heating element and at least a part of the cooling fan,
The information processing apparatus according to claim 1, wherein the first end of the duct member and the printed circuit board form a first duct opening directed toward the opening of the housing.   The said 2nd edge part of the said duct member and the said printed circuit board form the 2nd duct opening part orient | assigned to the direction different from the opening part of the said housing | casing. Information processing device.   The information processing apparatus according to claim 1, wherein the duct member has a substantially U-shaped cross section.   The information processing apparatus according to claim 1, wherein the duct member has a concave portion on an inner wall, and the cooling fan is provided to be supported by the concave portion. The housing has an engagement piece on the inner surface side of the opening,
The information processing apparatus according to claim 1, wherein the duct member is provided with a guide groove that engages with the engagement piece.   The information processing apparatus according to claim 4, wherein the duct member is provided with a plurality of the recesses at predetermined intervals.

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