CN1975178B - Component cooling device - Google Patents

Abstract

The present invention provides a component cooling device in which resonance of a fan case due to fan rotation can be suppressed. Four extensions 33A, 33B extending into the gas suction port 25 a are integrally formed with the duct 5 . Protruding portions 35A, 35B protruding toward the fan 3 are integrally formed with the extension portions 33A, 33B, respectively. The ends of the protruding portions 35A, 35B are arranged to be in contact with the ends of the corner portions surrounding the case-side mounting hole 21 a of the flange portion 21 . By inserting mounting pieces such as screws and bolts into each pair of case-side mounting holes 21a and duct-side mounting holes 33a while the four case-side mounting holes 21a and the four duct-side mounting holes 33a are aligned with each other, the fan 3 fixed in the pipe 5. Therefore, the fan case 11 and the duct 5 do not contact each other except the mounting portion around the case-side mounting hole 21a. The mounting portion of the fan case 11 and the mounted portion of the duct 5 contact each other only at the peripheries of the opposing openings of each pair of the case-side mounting hole 21 a and the duct-side mounting hole 33 a that are aligned.

Description

Component cooling device

technical field

The present invention relates to a component cooling device for cooling components such as electronic components by means of a fan arranged in a duct.

Background technique

Conventionally, such a component cooling device is known, which includes a fan for cooling electronic components, the fan being arranged in a duct having a gas suction port and a gas discharge port. Typically, in such a component cooling device, a case for a fan (fan case) includes case-side mounting holes through which screws or bolts pass. An extension extending into the gas suction port or the gas discharge port is integrally formed with the duct. A pipe-side mounting hole is formed in the extension portion. A screw or bolt passes through an aligned pair of housing-side and pipe-side mounting holes. The fan is mounted into the duct by bringing an extension of the duct into contact with the fan case and inserting a screw or bolt into each pair of case-side mounting holes and duct-side mounting holes that are aligned with each other. (Refer to Japanese Utility Model Publication No. 07-38720 and Japanese Patent Publication No. 2000-232276).

However, a problem with this type of component cooling device is that, when the fan rotates, vibration is induced and the fan housing resonates with the vibration, thereby generating noise.

Contents of the invention

An object of the present invention is to provide a component cooling device in which resonance of a fan case caused by rotation of a fan can be suppressed or prevented.

A component cooling device, the improvement of which is the object of the present invention, comprising ducts and fans. The pipeline includes a gas suction port and a gas discharge port. The fan includes a fan casing, and the fan casing is located in the gas suction port or the gas discharge port of the duct. The fan casing includes a plurality of mounting portions, each of which includes a casing-side mounting hole through which a mounting piece passes. The pipeline includes a plurality of installed parts, each of the installed parts includes a pipeline side installation hole, the installation piece passes through the pipeline side installation hole, and the shell side installation hole is installed with the pipeline side The holes are aligned with each other. by aligning the plurality of mounting portions in contact with each other with the plurality of mounted portions and inserting the mounting member into each aligned pair of the housing-side mounting holes and the pipe-side mounting holes, The fan is installed in the duct. The component cooling device cools a part or all of the components arranged in the duct by utilizing the air flow generated and flowing in the duct by the operation of the fan. In the present invention, the shape and size of the fan casing are formed such that the fan casing does not come into contact with the duct except at the plurality of mounting portions; the plurality of mounting portions and the plurality of mounted Portions are shaped and sized to contact each other only at peripheries of opposing openings of each pair of aligned housing side mounting holes and pipe mounting holes.

As shown in the present invention, when the plurality of mounting parts and the plurality of mounted parts of the pipe are only aligned at the opposite openings of each pair of the housing side mounting holes and the pipe mounting holes When the peripheries of the ducts and the fan case contact each other, the area (area) where the duct and the fan case contact each other is reduced. Even when the fan vibrates due to the rotation of the fan, the vibration of the fan is less transmitted to the duct, thereby suppressing or preventing noise.

The fan case includes a cylindrical portion forming an air duct, and a flange portion integrally formed with the cylindrical portion on at least one end portion of the cylindrical portion. In this case, the plurality of mounting portions are integrally formed with the flange portion, and the opening of the case-side mounting hole is opened on one end surface of the flange portion. The mounted portion of the duct includes an extension integrally formed with a wall portion of the duct and extending inwardly of the duct, and a protrusion integrally formed with the extension and project toward said fan. The fan-exposed end surface of the protruding portion is smaller than the fan-exposed end surface of the extension portion. With this arrangement, even when using a fan whose fan case has a cylindrical portion and a flange portion, since only the end surface of the protruding portion is arranged to be in contact with the end surface of the flange portion around the mouth of the case-side mounting hole, Therefore, the area (area) where the duct and the fan case contact each other can be easily reduced.

More specifically, the fan case includes a cylindrical portion forming an air duct, and a flange portion integrally formed with the cylindrical portion on at least one end portion of the cylindrical portion. The outline of the flange portion is a rectangle having four corner portions. The plurality of mounting portions are respectively formed at corner portions of the flange portion. The case-side mounting hole passes through a corner portion of the flange portion in a thickness direction of the flange portion. The duct includes a duct body including a top wall and a pair of side walls. The side walls are located on each side of the top wall respectively. The pipe main body surrounds the gas suction port and the gas discharge port in three directions perpendicular to each other. The duct main body includes a component insertion port disposed at a position opposite to the top wall. The duct main body includes four extension parts integrally formed with the duct main body so that the extension parts extend into the gas suction port or the gas discharge port. The two extensions are respectively arranged near two corners formed by the top wall and the pair of side walls, and the other two extensions are respectively positioned on the side Walls are located at both ends at one side of the component insertion port. Each of the four mounted portions of the duct includes an extension portion and a protruding portion integrally formed with the extension portion and protruding toward the fan. The pipe-side mounting hole penetrates the extension portion and the protrusion portion in a thickness direction of the extension portion and the protrusion portion. An end surface of the protruding portion is in contact with an end surface of the corner portion surrounding an opening of the case-side mounting hole formed in the flange portion. With this arrangement, the fan can be firmly fixed within the duct at a small number (four) of protrusions, whereby noise can be suppressed or prevented.

In this case, by inserting the fan into the duct main body through the component insertion opening of the duct main body, and inserting screws or bolts into each pair of mounting holes, four of the casing side mounting holes and the four pipe side mounting holes are aligned with each other, and the fan can be fixed in the pipe. With this arrangement, the fan can be easily installed within the duct. The mounts include rivets, screws and bolts.

According to the present invention, the fan is shaped and dimensioned not to contact the duct except at the plurality of mounting portions. The plurality of mounting portions and the plurality of mounted portions are shaped and sized to be mutually aligned only at peripheries of opposing openings of each pair of the housing-side mounting holes and the pipe-side mounting holes. touch. The area where the duct and the fan contact each other is thus reduced. Even when the fan vibrates due to the rotation of the fan, the vibration of the fan is less transmitted to the duct, thereby suppressing or preventing noise.

Description of drawings

1 is a perspective view of an electronic component cooling device according to the embodiment of the present invention;

2A is a front view of the electronic component cooling device of FIG. 1;

Fig. 2B is a bottom view of the electronic component cooling device of Fig. 1;

FIG. 3A is a top view of piping for the electronic component cooling device of FIG. 1;

3B is a rear view of the electronic component cooling device used in FIG. 1;

3C is a bottom view of the piping for the electronic component cooling device of FIG. 1;

FIG. 4 is a partially enlarged view of FIG. 2 .

Detailed ways

An embodiment of the component cooling device according to the present invention used as an electronic component cooling device for cooling electronic components will be described in detail with reference to the drawings. FIG. 1 is a perspective view of an electronic component cooling device. 2A and 2B are a front view and a bottom view of the electronic component cooling device, respectively. In FIG. 1 , for better understanding, the pipes of the electronic component cooling device are drawn in a phantom manner. The electronic component cooling device according to this embodiment includes a heat sink 1, a fan 3 and a duct 5 as shown in the figure. The heat sink 1 is made of metal with high heat radiation properties. The heat sink 1 includes a base 7 to which electronic components (not shown) are connected, and a plurality of fins 9 respectively extending from the base 7 .

The fan 3 is an axial fan, and includes a fan case 11 and impellers 13 . The blades 13 are driven by a motor 17 supported by the fan housing 11 via five webs 15 . The fan housing 11 includes a cylindrical portion 19 made of synthetic resin that forms an air duct in which the blades 13 are arranged. The pair of flange portions 21 , 23 are integrally formed with the cylindrical portion 19 on both sides of the cylindrical portion 19 . The profile of the pair of flange portions 21, 23 is a rectangle having four corner portions. Case-side mounting holes 21a, 23a are formed in four corner portions of the flange portions 21, 23, respectively. The case-side mounting holes 21 a , 23 a penetrate the flange portions 21 , 23 at corner portions, respectively, in the thickness direction. The four mounting portions of the flange portion 21 of the fan case 11 on the opposite sides of the heat sink 1 are constituted by the four case-side mounting holes 21a and adjacent areas of their flange portions.

As shown in detail in FIGS. 3A , 3B and 3C , the pipe 5 is made of synthetic resin and includes a pipe main body 25 and four fixing portions 27 . 3A, 3B and 3C are top, rear and bottom views, respectively. The duct main body 25 includes a top wall 29 and a pair of side walls 31 integrally formed with the top wall 29 . Side walls are located on each side of the top wall 29 respectively. The cross-sectional shape of the duct main body 25 is a rectangle with one open side. The heat sink 1 and the fan 3 are arranged side by side in the duct main body 25 . The duct main body 25 includes a gas suction port 25a, a gas discharge port 25b, and a component insertion port 25c. The gas suction port is located at one end portion of the duct formed by the top wall and a pair of side walls. The fan 3 is arranged on the side of the one end portion. A gas discharge port is located at the other end portion of the pipe. The heat sink 1 is arranged on the side of the other end portion. The component insertion port is located at a position opposite to the top wall 29 . The fan 3 and the heat sink 1 , where the heat sink 1 is in contact with unshown electronic components, pass through the component insertion opening 25 c. With this arrangement, when the blades 13 of the fan 3 rotate, the gas sucked from the gas suction port 25a passes between the plurality of cooling fins 9 of the heat sink 1, and is discharged from the gas discharge port 25b, thereby cooling and cooling the heat sink. 1 electronic components in contact with each other. Two fixing portions 27A and two fixing portions 27B are arranged at end portions of a pair of side walls on opposite sides to the top wall 29 . Two through holes 27a and two through holes 27b are formed in the two fixing portions 27A and the two fixing portions 27B, respectively. The electronic component cooling device according to this embodiment is fixed to the circuit board with mounting members such as screws passing through respective pairs of through holes 27a, 27b and the through holes of the circuit board, and electronic components (not shown) are mounted to the circuit board. on the circuit board.

As shown in detail in FIG. 3B , four extensions 33A, 33B extending into the gas suction port 25 a are integrally formed with the duct main body 25 . Two extension portions 33A of the four extension portions 33A, 33B are respectively arranged across the top wall 29 and the pair of side walls 31 in the vicinity of two corners formed by the top wall 29 and the pair of side walls 31. The pair of side walls 21 are formed. The other two extension portions 33B are respectively arranged at end portions of the side walls on one side of the component insertion opening 25c. The protruding portion 35A protruding toward the fan 3 is integrally formed with the extension portion 33B. Likewise, the protruding portion 35B protruding toward the fan 3 is integrally formed with the extension portion 33B. Pipe-side mounting holes 33a respectively penetrate through the extension portions 33A, 33B and the protruding portions 35A, 35B in the thickness direction, and are formed at approximately centers of the extension portions 35A, 35B, respectively. As shown in FIG. 3B , the protrusions 35A, 35B extend toward the top wall 29 . According to this embodiment, the area ratio of the end surfaces of the protruding portions 33A, 33B exposed to the fan 3 to the end surfaces of the extension portions 35A, 35B exposed to the fan 3 is 35% (percentage). The two installed portions of the pipe 5 are constituted by the extension portion 33A and the protruding portion 35A. The other two installed portions of the duct 5 are constituted by the extension portion 33B and the protruding portion 35B.

As shown in detail in FIG. 4 (a partially enlarged view of a portion indicated by reference numeral M in FIG. 2B ), according to this embodiment, the end portions of the protruding portions 35A, 35B are connected to the housing side surrounding the flange portion 21, respectively. The end portions of the corner portions of the mounting holes 21a are in contact. The fan 3 is fixed inside the duct 5 by inserting a fitting such as a rivet R into each pair of fitting holes, and aligning the case-side fitting hole 21 a and the duct-side fitting hole 33 a with each other. Mountings may include rivets, screws and bolts. In this arrangement, the fan case 11 is shaped and dimensioned not to come into contact with the duct 5 except at four mounting portions (around the case-side mounting hole 21a). The shapes and sizes of the four mounting parts (around the housing side mounting hole 21a) and the four mounted parts (the extension part 33A and the protruding part 35A of the pipe 5, and the extension part 33B and the protruding part 35B of the pipe 5) are processed to be only Peripheries of opposite openings of each pair of aligned case-side mounting holes 21a and pipe-side mounting holes 33a are in contact with each other.

According to the component cooling device of this embodiment, the four mounting portions of the fan case 11 and the four mounted portions of the duct 5 are only at the opposite openings of each pair of the case-side mounting holes 21a and the duct-side mounting holes 33a that have been aligned. Peripheries touch each other. As shown by the dotted line in FIG. 2A, the area where the duct 5 and the fan case 11 contact each other is small. Therefore, even when vibrating due to the rotation of the fan 3, the vibration of the fan 3 is less transmitted to the duct 5, and the fan case 11 is prevented from resonating, thereby suppressing or preventing noise.

In the above-described embodiments, the protruding portion is arranged at the duct 5 . The protruding portion can also be arranged on the fan casing 11 , or on both the fan casing 11 and the duct 5 .

Claims (4)

1. A component cooling device for cooling components, comprising: a duct comprising a gas inlet and a gas outlet, part or all of said components being disposed within said duct; and a fan comprising a fan housing located within the gas intake or the gas discharge of the duct, and the fan generates an airflow within the duct to cool the components, The fan casing includes a plurality of mounting parts, each of which includes a casing-side mounting hole, and a mounting piece passes through the casing-side mounting hole, The pipeline includes a plurality of installed parts, each of the installed parts includes a pipeline side installation hole, the installation piece passes through the pipeline side installation hole, and the shell side installation hole is installed with the pipeline side holes aligned with each other, by aligning the plurality of mounting portions in contact with each other with the plurality of mounted portions and inserting the mounting member into each aligned pair of the housing-side mounting holes and the pipe-side mounting holes, The fan is installed in the duct, wherein said fan housing is shaped and dimensioned such that said fan housing does not contact said duct except at said plurality of mounting portions; The plurality of mounting portions and the plurality of mounted portions are shaped and dimensioned only at peripheries of opposite openings of each pair of the housing-side mounting holes and the pipe-side mounting holes that are aligned. touch each other; The fan housing includes a cylindrical portion forming an air duct, and a flange portion integrally formed with the cylindrical portion on at least one end portion of the cylindrical portion; the plurality of mounting portions are integrally formed with the flange portion; The mouth of the housing-side mounting hole is opened on one end surface of the flange portion; Each of the mounted portions of the duct includes an extension integrally formed with a wall portion of the duct and extending inwardly of the duct, and a protrusion integral with the extension is formed and protrudes toward said fan; and An end surface of the protruding portion is in contact with only an end surface of the flange portion surrounding an opening of the housing-side mounting hole in which the flange portion is formed. 2. The component cooling device according to claim 1, wherein: The outline of the flange portion is a rectangle with four corner portions; The plurality of mounting portions are respectively formed at corner portions of the flange portion; The housing-side mounting hole passes through a corner portion of the flange portion in a thickness direction of the flange portion; The duct includes a duct body including a top wall and a pair of side walls, the side walls being located on each side of the top wall, respectively; The pipeline body surrounds the gas suction port and the gas discharge port in three directions perpendicular to each other; The pipe main body includes a component insertion port, and the component insertion port is arranged at a position opposite to the top wall; The pipeline main body includes four extension parts integrally formed with the pipeline main body, so that the extension parts extend into the gas suction port or the gas discharge port; Two of the four extensions are respectively arranged near two corners formed by the top wall and the pair of side walls, while the other two extensions are respectively positioned at both end portions of the side wall on the sides of the component insertion opening; and The pipe-side mounting hole penetrates the extension portion and the protrusion portion in a thickness direction of the extension portion and the protrusion portion. 3. The component cooling apparatus of claim 2, wherein: The fan is inserted into the duct main body through the component insertion port of the duct main body, and is fixed in the duct while the four housing-side mounting holes and the four duct-side mounting holes are aligned with each other, And the mounting piece is inserted into each pair of the shell-side mounting hole and the pipe-side mounting hole. 4. The component cooling apparatus of claim 1, wherein: The mounts include rivets, screws and bolts.

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