JP4854688B2 - Cooling system - Google Patents

Description

  The present invention relates to an apparatus for cooling a heating element, and more particularly to an apparatus for indirectly cooling the heating element by air-cooling a heat sink disposed in the vicinity of the heating element.

  A cooling device (air cooling device) that cools a heating element using air is used in various situations. However, the damage to the cooling device varies depending on the environment in which the cooling device is used. For example, since a cooling device attached to a machine tool is exposed to an environment in which water and oil used in the machine tool are scattered, the occurrence rate of failure due to adhesion of water and oil is extremely high.

Specifically, Patent Document 1 discloses one cooling device. In this cooling device, the cooling air intake port and the exhaust port, the heat sink, the cooling fan, and the filter are aligned vertically, and the cooling fan is arranged at the lower part of the duct. For this reason, when the cooling device disclosed in Patent Document 1 is used in a machine tool, water droplets or oil droplets formed by agglomeration of scattered water or oil on the inner surface of the duct are collected and adhered to or fixed to the fan. There is a problem that causes it.
JP 2001-148588 A

  Therefore, an object of the present invention is to provide a cooling device with few failures caused by adhesion or sticking of water droplets or oil droplets even in an environment where water or oil is scattered.

  The cooling device according to the present invention includes an inflow portion through which air flows. The inflow portion includes an air intake port for sucking air, an outlet port for sending out the air, a fan for forcibly moving air from the intake port toward the outlet port, and the intake port and the fan. A first perforated plate provided between the first perforated plate and the first perforated plate and the fan, and formed between the plurality of second holes and the plurality of second holes. A second perforated plate having a groove portion. The first and second perforated plates are arranged so that the first holes and the second holes do not overlap each other.

  According to the cooling device having such a configuration, it is possible to reduce the amount of droplets or oil droplets that adhere to or adhere to the fan. Therefore, it is not necessary to replace the fan over a long period.

(Embodiment 1)
1 to 4 show a first embodiment of a cooling device according to the present invention. 1 A of cooling devices are attached to the apparatus 2 provided with the heat generating body. The device 2 is, for example, a machine tool control panel. The device 2 has a housing 3. As shown in FIG. 2, the device 2 includes a heating element 4 inside the housing 3. The heating element 4 is a device that electronically controls a machine tool, for example, and is disposed in contact with or close to the rear wall 5 of the housing 3.

  The cooling device 1 </ b> A is an air cooling device that cools the heating element 4 using air, and includes a housing 6 fixed to the rear wall 5 of the device 2. As shown in FIGS. 1 and 2, the housing 6 is processed into a box shape using, for example, a plate made of metal such as stainless steel, and the inflow portion 7A into which cooling air flows in and the inflow portion 7A inflow. The distribution unit 8 that collects and distributes the generated air, the cooling unit 9 that cools the heating element 4 using the air distributed from the distribution unit 8, and the outflow that exhausts the air containing the heat recovered from the heating element 4 Part 10 is formed.

  The structure of the housing 6 will be described in more detail. The housing 6 has a substantially rectangular front wall (front vertical wall) 11 and left and right side walls (left vertical wall, right vertical wall) that connect the front wall 11 and the housing 3. 12 and 13 and upper and lower walls (upper and lower walls) 14 and 15. The housing 6 also includes a first intermediate partition wall 16 </ b> A that is disposed substantially parallel to the front wall 11 and partitions the distribution unit 8 from the cooling unit 9 behind the space formed by the front wall and the like, and the distribution unit 8. It has the 2nd intermediate partition 17 divided from 7 A of inflow parts, and the upper and lower partitions 18 and 19 for partitioning the cooling part 9 from the outflow part 10. FIG.

  As shown in FIG. 4, the inflow portion 7 is detachably attached to the second intermediate partition wall 17 by an engaging member (not shown), and includes a right surface portion 20 that is a right side wall and a left side wall. A left surface portion 21 having the engaging member, and a front portion 22, a rear portion 23, an upper portion 24 and a lower portion 25 which are provided around the left and right surface portions 20 and 21 and form a flow path of sucked air. Have. The right surface portion 20 supports the three fans 26. Note that the number of fans 26 provided in the inflow portion 7 may be one or more. The left surface portion 23 includes an air inlet 27 that sucks air and a filter 28 that covers the air inlet 26 so as to capture dirt in the air sucked from the air inlet 27. The right surface portion 20 has a delivery port 29 that sends out the air pressurized by the fan 26 to the distribution unit 8.

  The fan 26 has a substantially rectangular parallelepiped shape, a frame 31 that forms a space 30 penetrating in the horizontal direction, a rotary blade 33 that is rotatably disposed inside the frame 31 with the rotation shaft 32 directed in the horizontal direction, A motor (not shown) connected to the rotary blade 33 and a support member (not shown) for fixing the rotary blade 33 and the motor to the frame 31 are included. Of course, electrical wiring for connecting the motor to the power supply is also provided. In the present embodiment, the frame 31 of the fan 26 is attached to the right surface portion 20, and the space 30 forms the delivery port 29.

  The distribution unit 8 has a distribution chamber 34 that is a space for collecting cooling air supplied from the fan 26 of the inflow unit 7 and distributing it to the cooling unit 9. The distribution chamber 34 is formed between the front wall 11 and the first intermediate partition 16A, and the second intermediate partition 17, the right vertical wall 13 (see FIG. 3), and the upper and lower walls 18 and 19 (see FIG. 2). Surrounded by The second intermediate partition wall 17 has an air supply port 35 for supplying air to the distribution chamber 34. The air supply port 35 and the delivery port 29 are arranged so as to face each other. Further, the first intermediate partition 16A has a plurality of outlets 36A at appropriate locations.

  The cooling unit 9 includes a cooling chamber 37 formed between the first intermediate partition wall 16 </ b> A and the housing rear wall 5. The cooling chamber 37 is provided with a heat sink 38 as a plurality of heat dissipating members disposed so as to face the heating element 4 through the rear wall 5 so as to be in close contact with the first intermediate partition wall 16A. These heat sinks 38 are appropriately fixed to the rear wall 5 by fixing means. In addition, the position of the air outlet 36 is determined so that the air injected from the air outlet 36A can be efficiently cooled by the heat sink 38 that has received heat from the heating element 4 and has risen in temperature.

  The outflow part 10 has the exhaust chamber 39 arrange | positioned at the upper and lower sides of the cooling part 9, as shown in FIG. These exhaust chambers 39 are roughly constituted by upper and lower walls 14 and 15 of the housing 6, upper and lower walls 18 and 19 of the distribution chamber 34, a part of the left and right vertical walls 12 and 13, and a part of the front wall 11. It is surrounded and communicates with the cooling chamber 37 of the cooling unit 9. An exhaust port 40 is formed in a part of the front wall 11 forming a part of the exhaust chamber 31.

  According to the cooling device 1 configured as described above, when the rotary blade 33 rotates based on the driving of the fan motor, the air outside the cooling device 1 is taken in via the filter 28 at the inflow portion 7. The taken-in air is then pressurized by the fan 26 and moves from the delivery port 29 to the distribution chamber 34.

  As described above, the air pressurized by the fan 26 is supplied to the distribution chamber 34. Therefore, when the cooling device 1 is driven, the pressure in the distribution chamber 34 is higher than the atmospheric pressure. Next, the air in the distribution chamber 34 is jetted from the blowout port 36 and blown to the heat sink 38 of the cooling unit 9. Thereby, the heat sink 38 dissipates heat to the sprayed air, and the heating element 4 is cooled. The air that has received heat and has risen in temperature is divided in the vertical direction in the cooling chamber 37, moves to the upper and lower exhaust chambers 39 of the outflow portion 10, and is then exhausted to the outside through the respective exhaust ports 40.

  When the device 2 is a control panel of a machine tool, water and oil used in the machine tool are mist and exist in the surrounding atmosphere. In this case, the air sucked into the cooling device 1A naturally includes water or oil mist. A part of the mist is captured by the filter 28, but the mist that passes without being captured by the filter 28, or is captured by the filter 28 and once becomes a droplet (water droplet, oil droplet, etc.) and then scatters as a droplet. There are also water and oil to do. Part of the mist that scatters downstream of the filter 28 in the air flow direction passes through the fan 26 and becomes droplets on the inner wall of the distribution unit 8. Droplets generated on the inner wall of the distribution unit 8 flow down along the inner wall. When the fan 26 is disposed below the distribution unit 8, droplets generated on the inner wall of the distribution unit 8 come into contact with the fan 26 and accumulate. However, as in the present embodiment, the fan 26 is When aligned with the distribution unit 8 in the horizontal direction, droplets generated on the inner wall of the distribution unit 8 hardly contact the fan 26. Therefore, the droplets adhering to the fan 26 are reduced, and the service life of the fan 26 becomes very long.

  Moreover, since the inflow part 7 is detachable integrally with the 2nd intermediate partition 17 of 1 A of cooling devices, replacement | exchange of the fan 26 becomes easy.

  Also, in the case of a cooling device in which the exhaust port to the fan are arranged in a straight line, especially when there is an exhaust port above the fan, water or oil mist or dust that has entered from the exhaust port enters the fan, which is It may cause a malfunction. In order to prevent this, a filter may be provided at the exhaust port. However, in this embodiment, the exhaust port 40 opens toward the rear of the apparatus 2 instead of upward, so that cooling is performed from the exhaust port 40. It is difficult for dust to enter the apparatus 1A. For this reason, it is possible to sufficiently prevent dust from entering the exhaust port 40 simply by providing an alloy window or the like, and there is no need to provide a filter. Therefore, it is possible to reduce the risk of fan failure without requiring maintenance work such as replacement of the exhaust port 40 filter.

  Further, the air discharged from the exhaust port 40 is at a high temperature due to the heat dissipation of the heat sink 5. In the cooling device 1A according to the present embodiment, the air is exhausted rearward from the exhaust port 40. Further, the suction port 27 is open to the side. From such a positional relationship, the exhaust from the exhaust port 40 is hardly taken into the cooling device 1A from the suction port 27. Therefore, relatively low-temperature air can be taken into the cooling device 1A from the outside, and the cooling efficiency can be improved. Further, the fan environmental temperature can be made relatively low, and the fan life is extended.

  Further, almost all of the air sent to the distribution chamber 34 is jetted from the blowout port 36 toward the heat sink 38. Therefore, since most of the air sucked into the cooling device 1A is used for cooling the heat sink 38, the cooling efficiency can be increased. Further, as described above, the cooling efficiency can be further improved by appropriately arranging the air outlet 36 according to the heat radiation of the heat sink 38.

(Embodiment 2)
5 and 6 show a second embodiment of the cooling device according to the present invention. As illustrated, the cooling device 1B according to the second embodiment includes a third intermediate wall 41 having an air supply port 35 between the side wall 13 and the distribution unit 8, and includes an inflow portion 7C attached thereto. That is, the cooling device 1 </ b> B includes inflow portions 7 </ b> B and 7 </ b> C on the left and right of the distribution portion 8. The left inflow portion 7B has the same configuration as the inflow portion 7A of the first embodiment, and the right inflow portion 7B has substantially the same configuration as the inflow portion 7A of the first embodiment, and the inflow portion 7A is bilaterally symmetric. It is a thing. Thereby, the number of fans 26 can be increased as compared with the case where the inflow portion is provided only on either the left or right as in the first embodiment. Therefore, even if the pressure in each fan 26 is low, the inside of the distribution chamber 34 can be set to a predetermined pressure. That is, even if the flow rate of the air passing through the filter 17 is low, the inside of the distribution chamber 34 can be set to a predetermined pressure. Therefore, the pressure loss in the filter 17 can be reduced, and the efficiency of the fan can be improved. Further, since the air volume can be reduced by reducing the rotational speed of each fan 26, noise can be reduced. Moreover, since the air volume which passes per fan reduces, the mist adhesion of the water and oil to a fan can be reduced.

(Embodiment 3)
FIG. 7 shows Embodiment 3 of the cooling device according to the present invention. As shown in the figure, the inflow portion 7D of the cooling device 1C according to the third embodiment is substantially the same configuration as the inflow portion 7A according to the first embodiment, and has a rotating shaft that is inclined in an oblique direction with respect to the delivery port 29. 26. The fan 26 sends air toward the air supply port. Thereby, the front-rear width of the distribution unit 8 can be reduced.

(Embodiment 4)

  FIG. 8 shows Embodiment 4 of the cooling device according to the present invention. As shown in the figure, the inflow portion 7E of the cooling device 1D according to the fourth embodiment has a substantially L-shaped flow path from the suction port 27 that opens toward the front to the delivery port 29 that opens toward the right. . That is, the inflow portion 7E of the cooling device 1D is obtained by extending a flow path along the left side portion 65 from the rear wall 5 of the device 2 to the inflow portion 7A of the first embodiment. The flow path includes a right surface portion 20 having a delivery port 29, a rear portion 23 along the rear wall 5 of the device 2, a front portion 22 provided in parallel with a predetermined width separated from the rear portion 23, with a right end position aligned, The extended right side portion 42 along the left side wall 65 of the device 2, the extended left side portion 43 provided in parallel with a predetermined width apart from the left side wall 65, and the rear end of the extended left side portion 43. And an extended inclined portion 44 connecting the left end portion of the front portion 22. The extended inclined portion 44 is inclined with respect to the respective opening directions of the suction port 27 and the delivery port 29 so that the stagnation at the bent portion of the L-shaped flow path is reduced. A filter 28 is provided at the suction port 27. The fan 26 is provided between the extended right side 42 and the extended left side 43.

  By providing such an inflow portion, the arrangement of the fan 26 can be changed from the rear side of the device 2 to the side, so that the thickness of the cooling device 1D in the front-rear direction can be reduced. In addition, air radiated from the heat sink 38 is exhausted rearward from the exhaust port 40, while the suction port 27 sucks air from the front. Therefore, since the air flowing from the suction port 27 is relatively cold outside air, it is possible to improve the cooling efficiency. Further, since the filter 28 and the fan 26 are provided on the side of the apparatus 2 and facing forward, maintenance such as replacement of the filter 28 and inspection or replacement of the fan 26 is facilitated.

(Embodiment 5)
FIG. 9 is a front view of the first intermediate partition 16B provided in the cooling device according to the fifth embodiment of the present invention. As shown in the figure, the first intermediate partition wall 16B of the fifth embodiment has outlets 36A and 36B having different sizes, and two rows of small circular balloons arranged in a row similar to the first embodiment. It includes a mouth 36A and two large circular outlets 36B arranged in between. As shown in FIG. 10, the first intermediate partition wall 16C may include a rectangular outlet 36C and four outlets 36D arranged in a row.

  Thus, by appropriately changing the size and shape of the air outlets 36A, 36B, 36C, and 36D, the amount of air injected from the air outlets 36A, 36B, 36C, and 36D to the heat sink 38 can be controlled. Therefore, it is possible to obtain a preferable temperature distribution for the heat sink 38 during operation of the apparatus 2 in consideration of the direction and amount of air flowing into the distribution unit 8.

  When a plurality of heat sinks are provided, a conventional cooling device may be provided with individual fans that are individually attached to the heat sinks according to their heat generation. By appropriately changing the air outlets 36A, 36B, 36C, and 36D as in the present embodiment, air according to each heat sink 38 can be sent by one cooling device, so that the cooling performance is equal to or higher than that of the individual fan. Can be realized with a small number of fans 26, and the cost can be reduced.

(Embodiment 6)
11 and 12 are front views of the first intermediate partition wall 16D provided in the cooling device according to the sixth embodiment of the present invention. As shown in the figure, the first intermediate partition 16D of the sixth embodiment has outlets 36A, 36C, and 36E having different sizes and shapes. As shown in FIG. 12, the end portion that forms the outlet 36 </ b> E is curved so as to protrude toward the cooling portion 9. Since the end portion of the blowout port 36E is curved, the flow rate of air discharged from the blowout port 36E is increased, and the flow rate of air contacting the heat sink 38 is increased so that the cooling performance can be improved by the collision jet. Become.

(Embodiment 7)
13 to 16 show Embodiment 7 of the cooling device according to the present invention. In addition to the cooling device 1A of the first embodiment, the cooling device 1E includes first and second perforated plates 46 and 47 provided in the air flow path. The first perforated plate 46 is a flat plate having a plurality of first holes 48 provided between the air inlet 27 and the fan 26 and on the downstream side of the filter 28. The second porous plate 47 is a flat plate having a plurality of second holes 49. The second perforated plate 47 is provided between the first perforated plate 48 and the fan 26 and in the inflow portion 7 on the downstream side of the first perforated plate 48.

  Further, each of the first and second holes 48 and 49 is circular as shown in FIG. 15 and has shafts 50 and 51 serving as centers. The axis 50 of the first hole 48 and the axis 51 of the second hole 49 are perpendicular to the first and second perforated plates 46 and 47, respectively, and are offset from each other. That is, the first and second holes 48 and 49 are shifted so as not to overlap each other when viewed from the direction perpendicular to the first and second perforated plates 46 and 47. The first and second perforated plates need not have the first and second holes overlapping each other when viewed from the direction perpendicular to each other. For example, the first and second holes may be elliptical, elongated slits, etc. The shape may also be Further, the first and second holes may have different shapes. Furthermore, the first and second holes may have different intervals.

  When the device 2 is a control panel of a machine tool, as described above, water or oil used in the machine tool is present in the ambient atmosphere as a mist. Contains water and oil mist. A part of the mist is captured by the filter 28, but mist that passes without being captured by the filter 28, and water or oil droplets that are captured by the filter 28 and temporarily dispersed as droplets are also included. is there. In this way, mist and droplets are scattered even downstream of the filter 28 and reach the first porous plate 46. A part collides with the plate portion of the first perforated plate 46. The mist in the air that has collided becomes droplets on the surface of the first porous plate 46 and falls along the surface of the first porous plate 46. Therefore, air with reduced mist passes through the first hole 48. Since the centers of the first hole 48 and the second hole 49 are shifted, the air that has passed through the first hole 48 collides with the plate portion of the second porous plate 47 (see FIG. 16). The mist in the air that has collided with the plate portion of the second perforated plate 47 becomes a droplet and falls across the surface of the second perforated plate 47. The air whose mist is further reduced by the collision of the second porous plate 47 with the plate portion passes through the second hole 49 and reaches the fan 26. Thus, air mist outside the cooling device 1 can be reduced by passing through the filter 28 and colliding with the first perforated plate 46 and the second perforated plate 47. Then, the fan 26 comes into contact with air with reduced mist. The fan 26 is disposed beside the distribution chamber 34 and has no duct located above the fan 26. Therefore, even if the mist contained in the air sent out by the fan 26 is made into droplets, it hardly enters the fan 26. Therefore, the droplets adhering to the fan 26 are reduced, and the service life of the fan 26 becomes very long.

  In addition, since the suction force of the fan is strong near the periphery where the blades rotate and weak outside the center and outside of the fan, if the filter 28 is provided near the fan 26 without the perforated plate, the periphery where the blades rotate The contamination of the filter 28 in the vicinity is more intense than in the central portion and the outside. On the other hand, in the present embodiment, since the first and second perforated plates 46 and 47 are provided, the suction force is dispersed and equalized, and the filter 28 is uniformly soiled as a whole. Therefore, the mist that can be captured by the filter 28 before the filter 28 needs to be replaced increases, and the frequency of filter replacement can be reduced as compared with the conventional case.

  Further, the droplets on the surface of the second porous plate 47 generated as described above flow down naturally. Therefore, for example, droplets generated by providing a droplet tray at the bottom of the inflow portion 7 can be easily discarded and cleaned. Further, even if a part of the suction port 27 is not covered with the filter 28 due to a replacement mistake or defect of the filter 28, dirt such as oil mist is removed by the first and second perforated plates 46, 47. As a result, the contamination entering the fan 26 can be reliably reduced.

(Embodiment 8)
FIG. 17 is a perspective view of the third porous plate 52 according to the eighth embodiment of the present invention, which is provided in the inflow portion 9 instead of the second porous plate 47 according to the seventh embodiment. The 3rd perforated plate 52 has the groove part 54 which forms the groove | channel extended in the perpendicular direction between the 3rd hole 53 adjacent to a horizontal direction so that it may show in figure. The groove part 53 is a place where the air flowing through the first hole 48 of the first perforated plate 46 collides, and thus a place where many droplets are generated. Droplets generated on the third porous plate 52 are likely to flow along the groove 54. Further, the liquid droplets flowing through the groove portion 54 are not easily affected by the air flowing around due to the both side walls of the groove. Therefore, it becomes difficult for the droplets to re-scatter. The third perforated plate 52 may be provided in place of the first perforated plate 46 that is the upstream perforated plate. Thereby, it is possible to suppress re-scattering of the droplets generated in the upstream perforated plate.

(Embodiment 9)
FIG. 19 shows a second porous plate 47 according to the ninth embodiment of the present invention. As shown in the drawing, the second perforated plate 47 of the present embodiment is provided with a metal mesh 55 on the surface facing the first perforated plate 46. The wire mesh 55 is composed of vertical and horizontal wires. A net made of another linear material (wire) may be provided instead of the wire net 55. The cross section of the wire is not limited to a circle, but may be other shapes such as a square or a triangle. The metal mesh 55 substantially increases the surface area of the second perforated plate 47 with which the air collides through the first holes 48 of the first perforated plate 46. Therefore, the portion where the air collides increases, and droplet formation at the second perforated plate 47 and the metal mesh 55 can be promoted. Therefore, by providing the wire mesh 55, more air dirt adheres and the dirt reaching the fan 26 can be reduced. In addition, since the droplet generated on the surface of the second perforated plate 47 naturally flows down by the capillary force of the wire mesh 55, it is possible to reduce the chance that the droplet is scattered on the fan 26. Further, a hole may be provided in the wire mesh 55 at the same location as the perforated plate 47. In this case, since the wire mesh in the second hole 49 portion of the second perforated plate 47 is removed, the influence of clogging of the wire mesh 55 is eliminated when air passes through the second hole 49.

(Embodiment 10)
19 and 20 show the first and second slit plates 56 and 57 of the tenth embodiment according to the present invention. The first and second slit plates 56 and 57 are provided in the inflow portion 7 instead of the first and second perforated plates 46 and 47 of the seventh embodiment, respectively. The first slit plate 56 is attached to the inflow portion 7 between the air inlet 27 and the fan 26 and downstream of the filter 28. The first slit plate 56 has a plurality of parallel first flat plates 58 inclined so that air flows downward with respect to the horizontal direction. The second slit plate 57 is attached to the inflow portion 7 on the downstream side of the first slit plate 56 between the first slit plate 56 and the fan 26. The second slit plate 57 has a plurality of parallel second flat plates 59 inclined so that air flows upward with respect to the horizontal direction.

  The air sucked by the fan 26 and passed through the filter 28 collides with the bottom surface of the first flat plate 58 and flows downward. Due to this collision, droplets are generated on the bottom surface of the first flat plate 58. The liquid droplets on the bottom surface of the first flat plate 58 flow toward the second slit plate 57 along the inclination of the bottom surface of the first flat plate 58 and flow down between the first slit plate 56 and the second slit plate 57. . The air that has passed through the first slit plate 56 then collides with the upper surface of the second flat plate 59 and flows upward. Due to this collision, a droplet is generated on the upper surface of the second flat plate 59. The droplets on the second flat plate 59 flow along the inclination of the upper surface of the second flat plate 59 toward the first slit plate 56, and flow down between the first slit plate 56 and the second slit plate 57. Thus, the air flowing through the fan 26 is air in which dirt such as oil mist has been reduced by the collision with the first slit plate 56 and the second slit plate 57. Therefore, failure of the fan 26 due to dirt such as oil mist can be reduced. This also makes it possible to extend the life of the fan 26. In addition, since the liquid droplets flow promptly along the first flat plate 58 and the second flat plate 59, it is less likely to splash again. In addition, since the droplets collect and fall between the first slit plate 56 and the second slit plate 57, it is easy to provide a tray between the first slit plate 56 and the second slit plate 57. Can be discarded and cleaned.

(Embodiment 11)
21 and 22 show a third slit plate 60 according to the eleventh embodiment of the present invention. The third slit plate 60 is curved or bent so as to protrude downward, and includes a plurality of members having a V-shaped cross section, for example, a plurality of angle members 61. The third slit plate 60 is provided in the inflow portion 7 between the air inlet 27 and the fan 26 and downstream of the filter 28 instead of the first and second slit plates 56 and 57 of the tenth embodiment. It is done. The angle members 61 are inclined in parallel to each other and in one of the width directions. An angle member 61 shown in FIG. 21 shows an example in which it is inclined to the lower right with respect to the air flow direction indicated by an arrow.

  The air sucked by the fan 26 and passed through the filter 28 collides with the bottom on the upstream side of the bent portion of the angle member 61 and flows downward. Due to this collision, droplets are generated at the bottom of the upstream side. The liquid droplets at the bottom on the upstream side flow through the bottom of the angle member 61 according to the inclination of the angle member. Next, the air that has passed through the bent portion of the angle member 61 collides with the upper part on the downstream side of the bent portion of the angle member 61 and flows upward. Due to this collision, a droplet is generated at the upper part on the downstream side. The droplet on the downstream side flows in the upper part of the angle member according to the inclination of the angle member. Thus, the air flowing through the fan 26 is air in which dirt such as oil mist has been reduced by the collision of the angle member 61 with the bottom and top. Therefore, failure of the fan 26 due to dirt such as oil mist can be reduced. This also makes it possible to extend the life of the fan 26. Further, since the droplets flow quickly according to the inclination of the angle member 61 in the width direction, the droplets are less scattered again. Further, in the case of the angle member 61 shown in FIG. 21, for example, in the case of the angle member 61 shown in FIG. 21, the droplets gather and drop on the right side when viewed from the air flow direction. Therefore, disposal and cleaning can be easily performed by providing a tray on the inclined side.

(Embodiment 12)
FIG. 23 is a partial cross-sectional view of the fourth slit plate 62 according to the twelfth embodiment of the present invention. The fourth slit plate 62 is provided in the inflow portion 7 instead of the first slit plate 56 of the tenth embodiment. The fourth slit plate 62 includes a plurality of flat plate pairs formed of two flat plates, and includes a fourth flat plate 64 in addition to the third flat plate 63 similar to the first flat plate 58 included in the first slit plate 56. Similar to the third flat plate 63, the fourth flat plate 64 is inclined so that air flows downward with respect to the horizontal direction, and is inclined at a larger inclination angle with respect to the horizontal direction than the third flat plate 63. The front end of the fourth flat plate 64 is adjacent to the front end of the third flat plate 63. The fourth slit plate may include a plurality of flat plate pairs including a flat plate inclined at a smaller inclination angle with respect to the horizontal direction than the third flat plate 63 and the third flat plate 63.

  The air sucked by the fan 26 and passed through the filter 28 collides with the bottom surface of the fourth flat plate 64 and flows downward. Due to this collision, a droplet is generated on the bottom surface of the fourth flat plate 64. The liquid droplets on the bottom surface of the fourth flat plate 64 flow toward the second slit plate 57 along the bottom surface of the fourth flat plate 64 and flow down between the fourth slit plate 62 and the second slit plate 57. Next, the air that has passed through the fourth slit plate 62 collides with the upper surface of the second flat plate 59 and flows upward. When passing through the fourth slit plate 62, the space between the third flat plate 63 and the fourth flat plate 64 becomes gradually narrower toward the downstream. Therefore, the air passing through the fourth slit plate 64 accelerates and vigorously collides with the upper surface of the second flat plate 59. This accelerated collision promotes droplet formation on the upper surface of the second flat plate 59. The droplets generated on the second flat plate 59 flow toward the fourth slit plate 62 along the inclination of the upper surface of the second flat plate 59 and flow down between the fourth slit plate 62 and the second slit plate 57.

  In this manner, the fan 26 sucks air in which dirt such as oil mist has been reduced by the collision with the fourth slit plate 62 and the second slit plate 57. In particular, since air collides with the second slit plate 57 as described above, dirt such as oil mist in the air is efficiently removed. Therefore, failure of the fan 26 due to dirt such as oil mist can be reduced. This also makes it possible to extend the life of the fan 26. In addition, since the liquid droplets quickly flow along the third flat plate 63 and the fourth flat plate 64, the liquid droplets are hardly scattered again. Further, the droplets collect and fall between the fourth slit plate 62 and the second slit plate 57. Therefore, by providing a tray between the fourth slit plate 62 and the second slit plate 57, it can be easily discarded and cleaned.

  The present invention can be applied to a cooling device that is cooled by air, and can be applied to, for example, cooling of a heat sink for cooling a controller of a machine tool.

The front view of the apparatus which attached the cooling device which concerns on Embodiment 1, and this cooling device. The side view of the cooling device which concerns on Embodiment 1, and the apparatus which attached this cooling device. FIG. 2 is a plan view of the cooling device according to the first embodiment and a device provided with the cooling device. The perspective view of the inflow part which can be attached to the cooling device shown in FIGS. 1-3 detachably. The front view of the apparatus which attached the cooling device which concerns on Embodiment 2, and this cooling device. The top view of the apparatus which attached the cooling device which concerns on Embodiment 2, and this cooling device. The top view of the cooling device which concerns on Embodiment 3, and the apparatus which attached this cooling device. The top view of the apparatus which attached the cooling device which concerns on Embodiment 4, and this cooling device. The front view of the 1st intermediate partition with which the cooling device concerning Embodiment 5 is provided. FIG. 16 is a front view of another example of the first intermediate partition wall according to the fifth embodiment. The front view of the 1st intermediate partition with which the cooling device concerning Embodiment 6 is provided. Sectional drawing of the 1st intermediate partition with which the cooling device which concerns on Embodiment 6 is provided. The front view of the apparatus which attached the cooling device which concerns on Embodiment 7, and this cooling device. The top view of the apparatus which attached the cooling device which concerns on Embodiment 7, and this cooling device. The perspective view of the 1st perforated panel and the 2nd perforated panel with which the inflow part which concerns on Embodiment 7 is provided. FIG. 10 is a partial cross-sectional view showing the flow of air passing through the first and second perforated plates according to Embodiment 7. FIG. 10 is a perspective view of a second perforated plate according to Embodiment 8. FIG. 10 is a partial plan view of a second perforated plate according to Embodiment 9. FIG. 12 is a perspective view of first and second slit plates according to Embodiment 10. FIG. 12 is a partial cross-sectional view of first and second slit plates according to Embodiment 10. FIG. 20 is a perspective view of a third slit plate according to Embodiment 11. FIG. 12 is a partial cross-sectional view of a third slit plate according to Embodiment 11. FIG. 16 is a partial cross-sectional view of a fourth slit plate according to Embodiment 12.

Explanation of symbols

1A to 1E Cooling device, 2 device, 3 housing, 4 heating element, 5 rear wall, 6 housing, 7 inflow portion, 8 distribution portion, 9 cooling portion, 10 outflow portion, 11 front wall, 12 side wall (left vertical wall ), 13 side wall (right vertical wall), 14 wall (upper wall), 15 wall (lower wall), 16 first intermediate partition, 17 second intermediate partition, 18 upper partition, 19 lower partition, 20 right side, 21 left Face part, 22 Front part, 23 Rear part, 24 Upper part, 25 Lower part, 26 Fan, 27 Suction port, 28 Filter, 29 Outlet, 30 Space, 31 Frame, 32 Rotating shaft, 33 Rotating blade, 34 Distribution chamber, 35 Air supply Mouth, 36 Outlet, 37 Cooling chamber, 38 Heat sink, 39 Exhaust chamber, 40 Exhaust port, 41 Third intermediate partition, 42 Extended right side, 43 Extended left side, 44 Extended oblique part, 45 Transverse part, 46 1st lot Plate, 47 2nd porous plate, 48 1st hole, 49 2nd hole, 50 1st central axis, 51 2nd central axis, 52 3rd porous plate, 53 3rd hole, 54 groove part, 55 wire mesh, 56 1st Slit plate, 57 Second slit plate, 58 First flat plate, 59 Second flat plate, 60 Third slit plate, 61 Angle material, 62 Fourth slit plate, 63 Third flat plate, 64 Fourth flat plate

Claims (4)

A cooling device that cools the heating element by bringing cooling air into contact with a heat sink disposed adjacent to the heating element,
It has an inflow part for air to flow in,
The inflow part is
An air inlet that sucks in air;
A delivery port for delivering the air;
A fan for sending air from the intake port toward the delivery port;
A filter through which air sucked from the intake port passes;
A first perforated plate between the air inlet and the fan and provided downstream of the filter and having a plurality of first holes;
The first perforated plate and the fan are provided on the downstream side of the first perforated plate and have a plurality of second holes and a groove formed between the plurality of second holes. 2 perforated plates,
The cooling device, wherein the first and second perforated plates are arranged so as to include portions where the first holes and the second holes do not overlap each other when viewed from directions perpendicular to each other. . The cooling device according to claim 1 , further comprising a wire provided between the plurality of second holes in contact with a surface of the second perforated plate facing the first perforated plate. When only the first perforated plate and the second perforated plate are provided between the filter and the fan, and the first perforated plate and the second perforated plate are not provided between the filter and the fan The cooling device according to claim 1, wherein the filter dirt is made uniform as a whole as compared with the above. A cooling device that cools the heating element by bringing cooling air into contact with a heat sink disposed adjacent to the heating element,
An air inlet that sucks in air;
A filter through which air sucked from the intake port passes;
A first slit plate provided downstream of the filter and having a plurality of flat plates inclined downward with respect to the horizontal direction;
A second slit plate provided downstream of the first slit plate and having a plurality of flat plates inclined upward with respect to the horizontal direction;
A fan that is provided downstream of the second slit plate and forcibly moves the air that has flowed through the second slit plate in the direction of the flow path that communicates with the heat sink;
The first slit plate cooling apparatus you, comprising a plurality of flat plate pairs consisting of two flat plates inclined at different angles to allow air to flow downward with respect to the horizontal direction.

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