JP2005222584A - Cooling unit and method of electronic device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling unit and method of an electronic device which reduces the noise from the device casing by using less fans and powerfully cool the heat generating means at the same time without providing extra partitions or air flow paths. <P>SOLUTION: The cooling unit cools the heat generating means 34 with fans 32, 35 in the casing and exhausts heat outside. Air holes 26a 26b, and 26c are provided on the front or both sides of the casing and a heat radiator 33 is provided at the heat generating unit 34. A 2nd fan 35 is provided to take in fresh air through the air holes 26a, 26b, 26c and exhaust the air in the direction slanted to the length direction of the path between the fins of the heat radiator 33. A 1st exhaust fan 32 provided on the rear panel 23 of the casing changes the direction of the exhaust air 42 passing the radiator 33. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a cooling device for electronic equipment having a plurality of heat generating means such as a hard disk drive storage device and a cooling method for the electronic equipment, and in particular, the cooling effect for the plurality of heat generating means is enhanced with a small fan to cope with the outside temperature The present invention also relates to an electronic device cooling apparatus and an electronic device cooling method in which the cooling method of the heat generating means in the housing is controlled to be quiet.

  Conventionally, as a fan mounting structure that reduces noise generated from heat generating means such as HDDs and improves cooling, a heat generating means disposed on the front surface of the housing via a cooling air inlet on the side of the housing. Patent Document 1 discloses a cooling structure of an electronic device that guides and cools air sucked by a fan disposed behind a heat generating means and exhausts it by forced air cooling from a fan provided on a back plate of a housing.

  In the above-mentioned Patent Document 1, as shown in FIG. 16, two HDDs 7a and 7b are arranged in the lower part of the front surface of the chassis 4 having the VTR insertion port 4a, and the chassis 4 and the cover 1a constitute the casing 1. An electronic device 1 is disclosed. In this housing 1, the cooling air inlets 1b and 1c are provided near the center of both side surfaces of the cover 1a, and an air duct (not shown) extending from the cooling air inlets 1b and 1c to the front surface of the chassis 4 is provided. A cooling air flow path is formed. The cooling fans 8a and 8b are arranged on the front side of the chassis 4 in the vicinity of the HDDs 7a and 7b with the wind direction facing the rear. Exhaust ports 1e and 1f for exhausting hot air in the chassis 4 to the outside are provided on the rear surface of the chassis 4.

  The chassis 4 partitions the inside of the chassis 4 into approximately four blocks by three partition plates 4b, 4c, and 4d. The partition plate 4b partitions the right side surface with a relatively small width, and the exhaust fan 2 having a relatively large air volume is provided on the rear surface of the right side space. The partition plate 4c partitions a relatively wide right-side space partitioned by the partition plate 4b in the front-rear direction, and a fan 3 for relay exhaust with a wind direction rearward at a lower portion of the partition plate 4c near the partition plate 4b. Is provided. The partition plate 4d partitions the rear right side space with a relatively small width in the rear space partitioned by the partition plate 4c. An exhaust fan 5 is provided on the rear surface of the rear right side space. The rear center space, the left side space, and the rear right side space communicate with each other between the upper edges of the partition plates 4b and 4d, and the rear center space and the rear right side space are defined by the clearance of the lower edge of the partition plate 4c. Communicated with. Further, on the rear surface, there is shown a configuration in which rear cover 1g, 1h having an exhaust port 1e or 1f opened at the position of the exhaust fans 2, 5 is attached.

  In such a configuration, when the cooling fans 7a and 7b, the relay exhaust fan 3, and the exhaust fans 2 and 5 are rotated, the hot air generated in the HDDs 7a and 7b and others in the chassis 4 is cooled by the cooling fan 8a. 8b, and a part is exhausted from the exhaust port 1e to the outside by the exhaust fan 2 via the central space on the rear surface by the relay exhaust fan 3. A part of the air is led to the rear right space and is exhausted from the exhaust port 1e to the outside by the exhaust fan 5 through the rear center space. Furthermore, a part is led to the rear right space and is exhausted from the exhaust port 1 f by the exhaust fan 5. Cooling air in an amount that compensates for these displacements is introduced from the cooling air inlets 1b and 1c through the air duct to the front surface of the chassis 4 to cool the HDDs 7a and 7b, and then the cooling fans 8a and 8b as described above. At the rear and exhausted to the outside.

  Providing the partition plate in this way can confine the noise generation source in the partitioned space, and is effective in terms of soundproofing measures. Further, the space partitioned by the partition plate can be used as a flow path for cooling air from the cooling air introduction port.

  Further, Patent Document 2 discloses a structure in which a fan is directly attached to the casing of the heat generating means as a fan mounting structure for reducing noise generated from the heat generating means such as the HDD 7 and improving cooling.

  FIG. 17 is an exploded perspective view of the HDD 7 disclosed as a conventional example in Patent Document 2. In FIG. In this silencer and cooling structure, a base 10 and a cover 11 are attached so as to sandwich the HDD 7. In the base 10, the HDD 7 is fixed with screws 12 a, and a vibration isolating material 13 is disposed between the base 10 and the HDD 7. The cover 11 is fixed to the base 10 with screws 12b so as to face the base 10 with the HDD 7 therebetween. The cover 11 is provided with a cooling fan (dedicated fan) 14 fixed by screws 12 c, and a sound absorbing material 4 attached to the cover 11 is provided between the cover 11 and the HDD 7. In this way, the HDD 7 is housed in a sound insulation box constituted by the base 10 and the cover 11.

  That is, in the configuration of FIG. 17, the dedicated cooling fan 14 attached to the HDD 7 performs forced air cooling inside the sound insulation box to efficiently dissipate the heat generated by the HDD 7, thereby maintaining the functional reliability of the hard disk. .

  According to the electronic device cooling device and the electronic device cooling method described in Patent Document 1 described above, the partition plate and the plurality of fans are arranged in the casing of the electronic device, and the cooling air introduction port is formed in the side plate. Although the configuration for forcibly exhausting the introduced cold air to the rear plate of the housing is shown, it requires a plurality of partition plates and a large number of fans to cool a plurality of heat generating means, so it becomes complicated and from many fans There is a problem that the generated noises are combined to generate a large noise.

Further, according to the configuration of the HDD 7 described in Patent Document 2, the inner housing of the HDD 7 and the inner surface of the cover 11 are considered in terms of the blowout passage of the cooling fan 14 attached to the cover 11 constituting the sound insulation box. A special blowout passage is required, the HDD 7 is enlarged, and a special blowout passage must be prepared, resulting in a complicated structure of the housing.
JP-A-9-102690 Japanese Patent Laid-Open No. 11-66832

  The present invention has been made to solve the above-mentioned problems, and its purpose is to reduce noise generated from the housing of an electronic device by using a small number of fans, and without specially creating a partition plate or a blowing passage. Another object of the present invention is to provide an electronic device cooling apparatus and electronic device cooling method capable of simultaneously and powerfully cooling a plurality of heat generating means.

  Another object of the present invention is to obtain an electronic device cooling device and an electronic device cooling method in which one fan is gently rotated in accordance with the outside air temperature to suppress the noise generated from the fan as much as possible. is there.

  According to a first aspect of the present invention, there is provided a cooling device for an electronic device that cools a heat generating means through a fan in a housing and exhausts the heat to the outside of the housing. The air, the heat dissipating member disposed in the heat generating means, and the outside air from the air vent are sucked and the outside air is exhausted in a direction inclined with respect to the longitudinal direction of the passage between the fins of the heat dissipating member. An exhaust direction of the outside air that includes the second fan disposed and the first exhaust fan disposed on the back plate of the housing and passes through the heat dissipation member by the first fan and the second fan. This is a cooling device for electronic equipment characterized by converting the above.

  According to a second aspect of the present invention, there is provided a cooling device for an electronic device that cools a plurality of heat generating means through a fan in a housing and exhausts the heat to the outside of the housing. An air vent hole disposed in parallel with the panel on the chassis, the chassis is divided into a wide front space portion and a narrow rear space portion, and has an opening hole formed at a substantially central position. A partition plate, a power supply unit and a DVD drive unit and an HDD drive unit, which are a plurality of heat generating means, disposed in the chassis of the front space part, and a CPU unit which is a heat generating means, disposed in the chassis of the rear space part, and A heat dissipating member having fins disposed on the CPU section, a first fan for exhaust disposed on the back panel on the CPU section side, and an opening hole of the partition plate on the chassis in the rear space section The second fan for suction disposed in And a plurality of heat generating means arranged in the chassis of the front space portion are cooled with the outside air and sucked through the opening holes formed in the partition plate. The second fan exhausts the outside air from the direction inclined with respect to the longitudinal direction of the passage between the fins of the heat radiating member, exhausts the outside air through the first fan, and passes through the heat radiating member on the CPU. The cooling apparatus for electronic equipment is characterized by changing the exhaust direction of the outside air.

  According to a third aspect of the present invention, there is provided a cooling method for an electronic device that cools a plurality of heat generating means through a plurality of fans in a housing and exhausts the outside of the housing, and at least the first fan that exhausts the outside air in the housing and the outside air A second fan for suction, a first sensor for detecting the outside air temperature of the housing, a second detection sensor for the heat generating means for detecting the temperature of the heat generating means, and the first and second sensors And a CPU for controlling the temperature of the sensor, and both the first fan and the second fan if the first sensor and the second sensor are at a predetermined temperature or higher when both the first fan and the second fan rotate at a low speed. The CPU controls the high speed rotation of the fan, and the CPU controls the low speed rotation of the first fan and the second fan if both the first fan and the second fan rotate at a high speed and the second sensor falls below a predetermined temperature. Electronic equipment characterized by It is obtained by the method of cooling.

  According to the electronic device cooling apparatus of the present invention described above, noise generated from the housing of the electronic device can be reduced by using a small number of fans, and a plurality of heat generating means can be used simultaneously and without specially creating a partition plate or a blowing passage. It is possible to obtain a cooling device for an electronic device that can be cooled rapidly.

  According to the electronic device cooling method of the present invention, it is possible to obtain an electronic device cooling method in which one fan is gently rotated in accordance with the outside air temperature and noise generated from the fan is suppressed as much as possible.

  Hereinafter, a hard disk drive (HDD) and an embodiment of an electronic apparatus according to the present invention will be described in detail with reference to FIGS.

  1 is a perspective view of the recorder according to the present invention with the cover removed, FIG. 2 is a plan view of the chassis, FIG. 3 is a perspective view of the chassis for explaining the blowing state, and FIG. 4 is the blowing state. FIG. 5 is a perspective view for explaining the mounting state of the HDD, FIG. 6 is a cross-sectional view taken along the line A-A in FIG. 5, and FIG. FIG. 8 is a perspective view of the sheet, FIG. 9 is a perspective view illustrating a state in which an elastic member or a grounding member is attached to the sheet, and FIG. 10 is an explanatory diagram of an assembled state of the HDD to the outer housing. FIG. 11 and FIG. 12 are diagrams for explaining a state in which the HDD is pulled out from the outer casing, and FIG. 13 is a flowchart for explaining a method for controlling a plurality of fans applied to the present invention.

  A recorder 20 as an electronic device shown in FIG. 1 includes a metal chassis 21 such as aluminum whose cross section is bent in a substantially U-shape, and a panel 22 and a back plate 23 disposed on the front side and the back side of the chassis 21. Although not shown, the main body 25 is composed of a cover 24 (see FIG. 6) having a substantially U-shaped side section.

  The chassis 21 is provided with a ventilation hole for taking in air, and ventilators 26a (see FIGS. 1 and 3), 26b and 26c (see FIGS. 2 and 3) are appropriately formed in the cover 24. ing. A power source 27 is disposed on the left front side of the main surface of the chassis 21, a DVD drive unit 28 is disposed on the center front side, and an HDD drive unit 29 is disposed on the right front side. A partition plate 30 is disposed so as to be parallel to the panel 22 and the back plate 23. The chassis is divided into a wide space portion and a narrow space portion through the partition plate 30, and a tuner portion 31 and a central back side are provided on the right rear surface side between the partition plate 30 and the back plate 23 on the chassis 21. Is provided with a computer unit (CPU unit) 34 to which a heat sink member such as a second fan 35 having a relatively small capacity and a heat sink 33 is added while being inclined with respect to the longitudinal direction of the partition plate 30. A first fan 32 having a relatively large capacity is arranged on the left side of the. In addition, an opening window 37 into which a tray 36 that can be freely inserted into and removed from the DVD drive unit 28 is formed at the front surface of the panel 22, and various operation means (not shown) are also arranged.

  Further, as shown in the plan view of FIG. 2 with the panel 22 removed and the perspective view of FIG. 3, an outside air detection sensor 38 for detecting outside air is provided in the vicinity of the ventilator 26 c formed in the chassis 21 at the front of the HDD drive unit 29. Is provided. Further, a CPU sensor 39 for controlling the temperature of the CPU 34 is also provided in the CPU 34. In FIG. 2, reference numeral 40 denotes a rubber leg constituting the buffer means.

  In the recorder 20 of this example, as shown in FIG. 3, the outside air 42 taken in from each of the ventilators 26 a, 26 b, 26 c described above is applied to the lower side of the HDD driving unit 29, the upper side of the DVD driving unit 28 and the power source unit 27. The air is sucked by the second fan 35 through the opening hole 41 formed in the partition plate 30 through the space, and is forcedly air-cooled to the rear of the back plate 23 by the first fan 32 while cooling the heat sink 33 of the CPU 34. Constitute.

  The above-described second fan 35 is disposed to be inclined with respect to the opening hole 41 formed in the partition plate 30, so that the air cooling effect of the heat sink 33 of the CPU 34 can be enhanced. Moreover, the direction of the outside air can be changed to cool the heat generating means arranged in the rear space without using a partition plate or a blower guide. The reason why the air cooling effect is enhanced will be described with reference to the schematic diagram of FIG. 4 corresponding to those in FIG. 3 are denoted by the same reference numerals, and redundant description is omitted. 4 is a plan view when the air blowing method of FIG. 3 is applied to a substantially flat rectangular parallelepiped inner casing 43 that constitutes an enclosure of the HDD 45 described later.

  The outside air 42 taken in from the ventilators 26a and 26d drilled in the left and right side walls of the inner housing 43 and the ventilator 26c drilled in the front surface is sucked into the second fan 35, and is inclined to the front surface of the second fan 35. The heat sink 33 sends in strong wind. In the case of FIG. 4, the second fan 35 is not inclined and fixed to the chassis 21, but the heat sink 33 is inclined with respect to the second fan 35, but is in a relative relationship with the case of FIG. 3. It may be considered the same as the configuration of No. 3.

  Under the heat sink 33, heat generating means such as a CPU 34 is arranged. A first fan 32 is attached to the back plate 23 of the inner casing 43, passes through the fins 44 of the heat sink 33, and cools the heat generating means such as the power supply unit 27 and the like through the first fan 32. The heated air in 43 is exhausted. As described above, the cold wind sucked from the outside air 42 sent out from the second fan 35 obliquely enters between the fins 44 of the heat sink 33, so that the fins 44 receive stronger cold air and the cooling effect of the heat sink 33 is enhanced. .

  Next, the configuration of the HDD drive unit 29 will be described with reference to FIGS. 6 is a cross-sectional view taken along the line A-A in FIG. 5, and the HDD drive unit 29 is fixed on the chassis 21 to the left side plate of the chassis 21 that is bent in a U shape and the boss portion 46 by the chassis diaphragm. It is fixed on the chassis 47.

  As shown in FIG. 5, the sub-chassis 47 has a substantially dome-shaped heat release through hole 48 for venting air at a substantially central portion of a substantially rectangular main surface 47c, and the left and right ends of the main surface are perpendicular to each other. The mounting leg 47a and the mounting piece 47b are formed in a similar manner, the mounting leg 47a is fixed to the chassis 21 via the boss portion 46 by the chassis throttle, and the mounting piece 47b is bent into a U-shape. Fasten to the right side.

  As shown in FIG. 6 which is an AA cross-sectional view of FIG. 5, the HDD drive unit 29 includes a disk drive unit 51 covered with a box-shaped inner casing 50 serving as a metal enclosure, and a pickup head 52. HDD 45 having input / output plug group 49 (see FIG. 5), etc., and cushioning foam-repellent resin sheet such as polyurethane, elastic rubber, foam-repellent soft synthetic resin, etc. that serve as cushioning means for cushioning and sound insulation A buffer means (sound absorbing material) 53 surrounds the inner casing 50 of the HDD 45 and an outer casing 54 serving as a sound insulation box.

  The upper, lower, left, and right side plates and the back plate of the inner housing 50 of the HDD 45 are wrapped with a foam-repellent resin sheet 53 made of polyurethane for cushioning and sound insulation, and further inserted into the outer housing 54 for sound insulation. A foam-repellent heat conductive sheet 55 is disposed on the upper surface plate (top plate) of the inner housing 50. For this reason, in order to transfer the heat accumulated in the HDD 45 and transferred to the top plate of the inner casing 50 to the outer casing 54, a foam-repellent heat conductive sheet 55 is attached to the outer casing 54 side. It is in contact with a part of the top plate of the inner casing 50.

  Further, a conductive gasket 56 made of foam-repellent metal mesh or the like for preventing electrostatic breakdown of the HDD 45 is fixed to the left and right corners of the outer casing 54 or the inner casing 50 of the HDD 45, and the inner casing. The body 50 or the outer casing 54 is conducted. Reference numeral 57 denotes a thin film thermoplastic or thermosetting film sheet having a sliding surface such as polyethylene or vinyl chloride. Further, a heat radiating sheet 66 a for radiating the heat transmitted to the outer casing 54 is formed on the outer surface of the top plate 62 of the outer casing 54. The far infrared rays radiated from the heat radiating sheet 66 a are radiated to the heat radiating sheet 66 b formed on the cover 24 of the recorder 20 disposed at a position spatially separated from the top plate 62. In this case, the heat radiating sheet 66a radiates far infrared heat into the air, and the far heat radiated into the air is strongly absorbed by the same heat radiating sheet 66b formed on the cover 24. Therefore, heat from the inner casing 50 of the HDD 45 is radiated from the far infrared radiation sheet 66a affixed to the outer casing and pasted on the inner surface of the cover 24 by the far infrared transmission / reception member of the pair of far infrared radiation sheets 66a and 66b. The heat that is absorbed through the heat radiating sheet 66b and raised in temperature in the HDD 45 is radiated through the cover 24 that constitutes the heat radiating section. Of course, the heat from the inner housing 50 can be radiated to the outside by the cover 24 without forming the heat radiation sheet 66b on the cover 24 side. However, if the heat radiation sheet 66b is attached to the inner surface of the cover 24, the heat radiation sheet 66b absorbs the radiant heat from the heat radiation sheet 66a better, and the heat radiation effect can be enhanced.

  In the above-described configuration, in the electronic device configured to record or / and reproduce the signal by the hard disk drive, and to transmit the heat generated by the hard disk drive to the heat transfer unit and guide the heat to the heat dissipation unit. The hard disk drive is attached to the fixed part of the electrical equipment through the elastic body, and the heat radiating part is not through the elastic body, and the hard disk drive, the heat radiating part, and the heat conducting part are respectively attached to the surface. Since the electronic device has a configuration in which heat is transmitted through two opposing surfaces that are separated by a predetermined distance where the far-infrared transmitting / receiving member is disposed, the HDD is normally attached to a fixed part such as a base of the electronic device. The elastic body or the like is configured so that vibration is not transmitted directly. On the other hand, it is advantageous that the heat dissipating part is directly attached to the base because heat is transferred from the heat dissipating part to the base. However, if the heat radiating part and the HDD are coupled by a heat transfer member, the vibration and impact of the fixed part are directly transmitted to the HDD. Therefore, in the present invention, by adopting the “configuration in which heat is transmitted through two opposing surfaces separated by a predetermined distance where the far-infrared transmitting / receiving member is disposed”, vibration and impact are not transmitted even if heat is transmitted. It is possible to take.

  The structure of the film sheet 57 that encloses the inner casing 50 of the HDD 45 described above, a method of attaching the foam-repellent resin sheet 53, and the inner casing 50 wrapped with the foam-repellent resin sheet 53 are mounted (inserted) in the outer casing 54. The method will be described below with reference to FIGS.

  Prior to the description of FIG. 7, FIG. 8 will be described. FIG. 8 shows an example of the form of the film sheet 57. The film sheet 57 having a slipperiness on the surface made of a thin film synthetic resin such as polyethylene or vinyl chloride is cut into a substantially rectangular shape. The upper sheet 57a in contact with the top plate of the HDD 45 is composed of front, rear, left and right folded sheet pieces 57F, 57B, 57L, 57R that are in contact with the front, rear, left, and right plates of the HDD 45, and is folded at the fold line 57h. A substantially rectangular lower sheet 57b connected to the rear folded sheet piece 57B and in contact with the back side of the inner housing 50 is provided with a discharge hole 57f for releasing the heat in the HDD 45 and a tongue with the folding line 57h as a boundary. A piece-like tensile piece 57g is punched out.

  The upper sheet 57a is formed with a square-shaped through hole at a substantially central position, and a substantially rectangular heat conductive sheet 55 attached to the inner surface of the outer casing 54 is connected to the inner casing through the conductive hole 57e. It is made to touch 50 top plates. In addition, rectangular through holes are formed in the front, rear, left and right, and four substantially rectangular conductive gaskets 56 affixed to the inner surface of the outer casing 54 are connected through the grounding holes 57c and 57d. It is formed so as to contact the top plate of the housing 50. That is, the film sheet 57 used in the present invention may be cut into a shape obtained by adding a cross-shaped portion having a folded area on the left and right and front and back and a rectangular shape from the original film sheet.

  A method of attaching the foam repellent resin sheet 53 to the film sheet 57 will be described with reference to FIG. In FIG. 9, a foam repellent resin sheet 53a formed in a substantially rectangular shape is pasted from the back side of the lower sheet 57b, a foam repellent resin sheet 53b having a similar shape is pasted on the left and right folded sheet pieces 57L and 57R, The foam-repellent resin sheet 53c, which is also formed in a substantially L shape on the upper sheet 57a and has a cut groove corresponding to the grounding holes 57c and 57d, is attached. The L-shaped short side portion of one foam repellent resin sheet 53c is attached to the front sheet folded piece 57F, and the long side portion is attached to the left side surface of the upper sheet 57a. The L-shaped short side portion of the other foam repellent resin sheet 53d is attached to the rear sheet folded piece 57B, and the long side portion is attached to the right side surface of the upper sheet 57a.

  FIG. 7 is a perspective view for explaining an assembly state when the HDD 45 is mounted on the outer casing 54 of the HDD driving unit 29. Hereinafter, the foam-repellent resin sheet 53 is attached to the film sheet 57 from the back side of the outer casing 54. A method of mounting the HDD 45 wrapped with the packaging body 59 attached with to the outer casing 54 will be described. The top plate 60 of the box-shaped enclosure constituting the inner housing 50 of the HDD 45 is provided on the lower side in FIG. 7, and the upper side is in a state where a printed board without a metal bottom plate is exposed. Inside the HDD 45, as detailed in FIG. 6, a disk drive unit 51, a pickup head 52, and the like are disposed. Reference numeral 49 denotes a plug group for input / output of the HDD 45.

  The film sheet 57 described in FIG. 8 and the foam-repellent resin sheets 53 a, 53 b, 53 c, 53 d are attached to the package body 59, and the foam-repellent resin sheet of the upper sheet 57 a of the film sheet 57 constituting the package body 59. The top plate 60 of the HDD 45 is placed on the 53c, 53d, and the left and right front / rear folded pieces 57L, 57R, 57F, 57B are folded back to form a valley folded state, and the left / right front / rear side plates of the inner housing 50 of the HDD 45 are elastic. In addition, the foam repellent resin sheets 53b, 53c and 53d having excellent vibration and sound insulation properties are wrapped and the lower sheet 57b is covered with the back side of the HDD 45, so that the back side of the HDD 45 is foamed via the film sheet 57. Covered with a sheet 53a.

  In this way, the HDD 45 wrapped with the package 59 is inserted into the outer casing 54. As shown in FIG. 7, the outer casing 54 is formed of a metal plate such as aluminum in a substantially box shape, and the left and right side plates 54 </ b> L and 54 </ b> R and the rear side plate 54 </ b> B end portions are bent so as to be orthogonal to the top plate 62. A fixing hole 61 for fixing is formed. Further, the front side plate 54F is bent short so that the plugging group 49 of the HDD 45 is exposed. A substantially rectangular heat conduction sheet 55 having a good thermal conductivity smaller than the rectangular conduction hole 57e formed in the film sheet 57 and having elasticity is bonded to the center position on the inner side of the top plate 62 of the outer casing 54. Yes. As the heat conductive sheet 55, for example, a non-silicon 3M hyper soft heat dissipation material (NO, 5505S) can be used. This hypersoft heat dissipation material is a thin base film with a heat conductive acrylic elastomer.

  At the inner left and right front and rear positions of the top plate 62 of the outer casing 54, a substantially rectangular conductive gasket 56 having good conductivity and elasticity smaller than the rectangular grounding holes 57d and 57c formed in the film sheet 57. Is glued. As this conductive gasket 56, for example, a soft high seal gasket (SHSG) manufactured by Kitagawa Industries Co., Ltd. can be used. The SHSG can maintain excellent conductivity with a relatively low compressive force by mixing conductive mesh in the foam-repellent resin.

  10A, 10B, and 10C, an insertion method in the case where the subassembly package 65 in the subassembly state in which the HDD 45 is wrapped with the package 59 is inserted into the outer casing 54 will be described. FIG. 10B is a sectional side view of the outer casing 54 cut in a direction orthogonal to the long side, but the short side inner dimension L2 and the long side inner dimension (see FIG. 10) of the outer casing 54 are shown. The inner height H2 is smaller than the short side outer dimension L1 and the long side outer dimension (not shown) of the subassembly package 65 and the outer height H1. This is because the volume of the sub-assembly package 65 is larger by the compressible thickness of the foam-repellent resin sheets 53a, 53b, 53c, and 53d attached to the film sheet 57.

  As described with reference to FIG. 6, the heat radiation sheet 66 a is attached to the surface of the top plate 62 of the outer casing 54. As shown in FIG. 10C of the enlarged view of the D part in FIG. 10B, the heat radiating sheet 66a is made of an infrared transmitting / receiving member that radiates or absorbs far infrared rays made of ceramic on an adhesive sheet 67 constituting an adhesive layer. It is possible to use “First I paste first (trademark)” made by a corporation. This far-infrared receiving / receiving member is commercially available in the form of a hard type or a flexible film based on ceramic coated on a base such as aluminum or the like, but ceramic on the outer surface of the top plate 62 of the outer casing 54 or the inner surface of the cover 24. Alternatively, an infrared transmitting / receiving member such as may be directly applied. Further, the outer casing 54 may be processed into a box shape from a metal material such as aluminum coated with the far infrared ray transmitting / receiving member.

  Therefore, when the sub-assembly package 65 is pushed into the outer casing 54 as shown by the arrow C, the foam-repellent resin sheets 53b, 53c, 53d attached to the film sheet 57 are crushed, and the film sheet 57 Since the surface is slippery, it can be smoothly mounted in the outer casing 54.

  The subassembly package 65 containing the HDD 45 mounted in the outer casing 54 is firmly held in the outer casing 54 by the expansion (swelling) of the repellent resin sheets 53b, 53c, 53d. A method of simply pulling out the subassembly package 65 inserted in the outer casing 54 from the outer casing 54 will be described with reference to FIGS. 11A, 11B, and 12. FIG.

  11A and 11B and FIG. 12, FIG. 11A and FIG. 11B are perspective views with a cross section taken as a section showing a state in which the subassembly package 65 is mounted in the outer casing 54, and FIG. FIG. 6 is a side sectional view showing a state in which a subassembly package 65 is pulled out from 54. As shown in FIG. 11A, the sub-assembly package 65 containing the HDD 45 mounted in the outer casing 54 has a tongue-shaped tension piece 57g formed on the film sheet 57 on the rear plate 54B side of the outer casing 54. As shown in FIG. 11B, this tension piece 57g is raised with a finger, and the tension repellent resin sheet 53b, 53c, 53d attached to the package body 59 is lifted as shown by arrow E in FIG. Since it is lifted while being compressed by the side plates 54F and the left and right side plates 54L and 54R, the package 59 can be easily extracted from the outer casing 54.

  As described above, the subassembly package 65 incorporating the HDD 45 can be easily attached to or detached from the outer casing 54 by utilizing the slipperiness of the surface of the film sheet 57 in the outer casing 54. With the top plate 62 of the outer casing 65 facing upward, as shown in FIG. 6, the sub-chassis 47 is fixed with screws or the like through a foam repellent resin sheet 53a. Therefore, as shown in FIG. 6, in the subassembly package 65, the foam-repellent resin sheet 53 a serves as a buffer member for the subchassis 47, and the HDD 45 can be shielded from vibration of the subchassis 47.

  Next, a method for controlling the two first and second fans 32 and 35 provided in the recorder chassis 21 described in FIGS. 3 and 4 will be described with reference to FIG. The CPU 34 shown in FIG. 3 performs the control shown in the flowchart of FIG. The two first and second fans 32 and 35 are configured to be switchable to high speed rotation (H rotation) and low speed rotation (L rotation), respectively.

  In FIG. 13, when the power is turned on, the CUP 34 starts control of the two fans 32 and 35. In the first step ST1, the power of the first and second fans 32 and 35 is turned off by the stop setting. In the first step ST1, the first and second fans 32 and 35 are stopped for a predetermined time T0 minutes (for example, 5 minutes) from the start of power-on in order to reduce noise.

  In the second step ST2, the CPU 34 determines whether or not the outside air detection sensor 38 described in FIG. 3 is equal to or higher than a predetermined temperature T1 ° C. (for example, 55 ° C.). Since the outside air detection sensor 38 is cut off when the temperature is T1 ° C. or higher, if the temperature is T1 ° C. or higher, the CPU 34 enters the emergency process of the 14th step ST14 to turn off the power of the recorder 20. In the emergency process of the fourteenth step ST14, the power supply unit 27 is turned off, and the power supply unit 27 is set so as not to be turned off even if the power supply unit 27 is turned on again unless the emergency process is canceled. When the second step ST2 is NO, the process proceeds to the third step ST3.

  In the third step ST3, it is determined whether or not the outside air detection sensor 38 is equal to or higher than a predetermined temperature T2 (for example, 35 ° C.). If the temperature of the outside air detection sensor 38 is equal to or higher than T2, the process proceeds to the tenth step ST10, where the high speed rotation setting process is performed, and the first and second fans 32 and 35 rotate in the H rotation state. If the temperature is equal to or lower than T2 ° C., the two fans 32 and 35 are stopped. Therefore, if the temperature of the outside air detection sensor 38 is not T2 ° C. or higher in the third step ST3, the process proceeds to the fourth step ST4, and the temperature of the CPU sensor 39 added to the CPU 34 is a predetermined temperature T3 ° C. (for example, 60 ° C.). It is determined whether or not the above is true. If the 4th step ST4 is YES, it will progress to 10th step ST10 and a high-speed rotation setting process will be performed. If NO, the process proceeds to the fifth step ST5.

  In the fifth step ST5, it is determined whether or not a predetermined time T0 minutes (for example, 5 minutes) has elapsed. If it is not the predetermined time T0, the head is returned to the second step ST2, and if YES, the sixth step ST6 is entered. move on.

  In the sixth step ST6, the first and second fans 32 and 35 are set to the L rotation mode, and the fans 32 and 35 rotate in the L rotation state.

  In the seventh step ST7, it is determined whether or not the temperature of the outside air detection sensor 38 is equal to or higher than T1 ° C. If YES, the outside air detection sensor 38 is in a disconnected state, and therefore enters the emergency processing state in the 14th step ST14. Turn off the power. In the case of NO, the process proceeds to the eighth step ST8.

  In the eighth step ST8, it is determined whether or not the temperature of the outside air detection sensor 38 is equal to or higher than T2. In YES, it progresses to 10th step ST10, and the 1st and 2nd fans 32 and 35 switch to H rotation state, and progresses to 9th step ST9 in NO. In the ninth step ST9, it is determined whether or not the temperature of the CPU sensor 39 is T3 or higher. In YES, it progresses to 10th step ST10, and the 1st and 2nd fans 32 and 35 are switched to H rotation state, and in NO, it returns to the head of 7th step ST7, 7th step ST7 thru | or 9th step ST9 The judgment is repeated.

  In the tenth step ST10, as described above, both the first and second fans 32 and 35 perform H rotation in the H rotation mode. In an eleventh step ST11, it is determined whether or not the temperature of the outside air detection sensor 38 is T1 ° C. or higher. If YES, since the outside air detection sensor 38 is in a disconnected state, the emergency processing state of the 14th step ST14 is entered and the power is turned off. If NO, the process proceeds to the twelfth step ST12. In the twelfth step ST12, it is determined whether or not the temperature of the outside air detection sensor 38 is equal to or lower than a predetermined temperature T4 (for example, 32 ° C.).

  In the 12th step ST12, when the temperature of the outside air detection sensor 38 is T4 or less, the head is returned to the head of the 6th step ST6, and both the first and second fans 32 and 35 perform L rotation. If NO, the process proceeds to a thirteenth step ST13 to determine whether or not the temperature of the CPU sensor 39 is equal to or lower than a predetermined temperature T5 ° C. If NO, the process returns to the head of the eleventh step ST11, and the eleventh step ST11. Or the determination of thirteenth step ST13 is repeated. If YES, the process returns to the sixth step ST6, and both the first and second fans 32 and 35 perform L rotation.

  That is, in the present invention, at the time of initial setting of the power source, the two fans 32 and 35 are stopped for about 5 minutes for noise reduction, and when the temperature of the sensor 38 is T1 ° C. or lower, the fans 32 and 35 are stopped. In the above, the fans 32 and 35 are rotated at a high speed (H rotation), and when the temperature of the sensor 38 is T1 ° C. or less and T0 minutes (5 minutes) have elapsed, the fans 32 and 35 are rotated at a low speed (L rotation), When the temperature of the sensor 38 exceeds T2 ° C. or when the sensor 38 is cut off, the emergency processing state is entered and the power is turned off. When the temperature of the sensor 39 exceeds T3 ° C., the fans 32 and 35 rotate H. Take control.

  When the temperature of the sensor 38 becomes T1 ° C. or higher during the L rotation, the fans 32 and 35 are rotated H, and the emergency processing state is entered when the temperature of the sensor 38 becomes T2 ° C. or higher and when the sensor 38 is turned off. When the temperature of the sensor 39 reaches T3 ° C. or higher, the fans 32 and 35 are controlled to rotate H.

  Further, when the temperature of the sensor 38 becomes T4 ° C. or lower during H rotation, the fans 32 and 35 are rotated L, and the emergency processing state is entered when the temperature of the sensor 38 becomes T1 ° C. or higher and when the sensor 38 is turned off. When the power is cut off and the temperature of the sensor 39 becomes T5 ° C. or lower, the fans 32 and 35 are controlled to rotate L.

  In the sub-assembly package 65 described above with reference to FIG. 6, the heat accumulated in the inner casing 50 of the HDD 45 is configured to be transmitted to the outer casing 54 by the heat conductive sheet 55, but as shown in FIG. 14A. Further, from the heat radiation sheets 70a and 70b having the same configuration as the heat radiation sheets 66a and 66b described above with reference to FIG. 6 at positions where the top plate 60 of the inner housing 50 of the HDD 45 and the top plate 62 of the outer housing 54 are opposed to each other. The far-infrared receiving / receiving member is disposed, and the accumulated heat (far-infrared heat) from the top plate 60 of the inner casing 50 of the HDD 45 is transmitted to the heat radiating sheet 70b and disposed on the inner surface of the top plate 62 of the outer casing 54. The radiant heat is absorbed by the heat radiating sheet 70a, and the heat radiated to the outer casing 54 is radiated from the cover 24 through the far infrared ray transfer member including the heat radiating sheet 66b and the heat radiating sheet 66a disposed on the cover 24. did Than it is. In FIG. 14A and FIG. 14B, the same reference numerals are assigned to portions corresponding to FIG.

  FIG. 14B shows still another configuration of the present invention, in which the heat accumulated in the HDD 45 is radiated to the heat sink 73 erected on the subchassis 47 using the heat radiating sheets 70a and 70b similar to FIGS. 6 and 14A. It is a thing.

  In FIG. 14B, the HDD 45 has a vibration-proof structure with respect to the sub chassis 47 by buffer means such as rubber legs 73, and the inner wall of the outer casing 45 is covered with a foam-repellent resin sheet 53 to be quiet and soundproof. A substantially rectangular conductive plate 72 made of a metal is disposed at a position facing away from the heat dissipation sheet 70 b made of ceramic formed on the top plate 60 of the HDD 45. A far-infrared transmitting / receiving member made of the heat radiating sheet 70a is attached to a position where the conductive plate 72 is opposed to the heat radiating sheet 70b. One end of the conductive plate 72 is fixed to the opposite side of the fin of the heat sink 71 and protrudes from a through hole 74 formed in the outer casing 54. Accordingly, the heat of the HDD 45 is radiated into the space from the heat radiating sheet 70 b, absorbed by the heat radiating sheet 70 a of the conductive plate 72, transmitted to the conductive plate 72, and further from the heat sink 71 through the conductive plate 72 to the outside air. Heat is dissipated inside.

  According to the HDD 45 having the configuration shown in FIGS. 14A and 14B, the accumulated heat from the HDD 45 and the outer casing 54 is completely separated from the cover 24 and the heat sink 71 serving as heat radiators. Even if such is applied, since these shocks and vibrations are not transmitted to the HDD 45, the reliability of the HDD 45 can be improved.

  Another configuration example of the film sheet 57 described above with reference to FIG. 8 will be described with reference to FIG. Portions corresponding to those in FIG. In the configuration shown in FIG. 15, the left folded sheet piece 57L, the right folded sheet piece 57R, and the front folded sheet piece 57F of the film sheet 57 are connected to the dome-like tongue pieces 76L, 76R, 76F and the front and rear folded sheet pieces 57F, 57B. A square-shaped folded piece 77 serving as a paste margin is formed, and tongue pieces 76L, 76R, and 76F are inserted into a groove 78 formed in the lower sheet 57b at the time of assembly, so that the package 59 or the subassembly package 65 It can be formed into an inner box shape in an assembled state. With such a configuration, it becomes easier to mount the subassembly package 65 on the outer casing 54.

  A recorder having an HDD or a DVD has been described as the electronic device described above. As a recording / reproducing means, a disk recording / reproducing device such as a CD or CD-ROM, a recording / reproducing device using a tape as a recording medium such as a VTR or a tape recorder, etc. The present invention can be applied to various driving means and electronic devices that generate heat.

  In each of the above-described embodiments, the sub-assembly package body in which the inner casing as the HDD enclosure used for the HDD drive unit is wrapped with the package made of the film sheet with the sound absorbing material attached is placed in the outer casing as the sound insulation box. The DVD drive unit, CD drive unit, CD-ROM drive unit, disc recording / reproduction drive unit, VTR drive unit, tape recorder drive unit, etc. are built in the inner case, and the inner case is made to absorb sound. You may make it insert the subassembly package body wrapped with the package body which consists of a film sheet which affixed the material in the outer housing | casing as a sound insulation box.

It is a perspective view in the state where the cover which shows one example of a recorder of the present invention was removed. It is a top view of a recorder shown in FIG. It is a perspective view of the chassis for demonstrating the flow of the airflow by the operation | movement of the fan which shows one form of the recorder of this invention. It is a top view of HDD which showed typically arrangement of a fan used for a recorder of the present invention. It is an external appearance perspective view which shows the attachment state of the HDD drive part used for the recorder of this invention. FIG. 6 is a cross-sectional view taken along line AA shown in FIG. 5 for explaining a heat dissipation method of the HDD used in the recorder of the present invention. It is a disassembled perspective view of the state which mounts HDD used for the recorder of this invention in an outer housing | casing. It is a perspective view of the film sheet used for the recorder of this invention. It is a perspective view which shows the state which affixes an elastic member and an earth grounding member on the film sheet of FIG. It is an assembly state explanation of HDD to the outer case used for the recorder of the present invention. It is explanatory drawing of the tension | pulling piece which pulls out HDD from the outer housing | casing of the recorder of this invention. It is explanatory drawing of the state which pulls out HDD from the outer housing | casing of the recorder of this invention. It is a flowchart for the control method of the some fan applied to this invention. FIG. 7 is a side sectional view similar to FIG. 6 of a main part showing another embodiment of the present invention for explaining a heat dissipation method of the HDD. It is a perspective view similar to FIG. 8 which shows the other Example of the sheet | seat used for the recorder of this invention. It is a perspective view of HDD for demonstrating the conventional sound insulation means. It is a perspective view which shows the structure of HDD for demonstrating the conventional sound insulation means.

Explanation of symbols

  20 recorder, 21 chassis, 22 panel, 24 cover 28 DVD drive unit, 29 HDD drive unit, 32 first fan, 34 CPU, 35 second fan, 38 outside air detection sensor, 39 CPU sensor, 50 inner casing 54 Outer housing 55 Heat conduction sheet 57 Film sheet

Claims (6)

In a cooling device for electronic equipment that cools a heat generating means through a fan in a housing and exhausts the heat outside the housing,
An air vent disposed on the front surface of the housing or the front surface of the left and right side plates;
A heat dissipating member disposed on the heating means;
A second fan arranged to suck outside air from the vent hole and exhaust the outside air from the air vent hole in a direction inclined with respect to the longitudinal direction of the passage between the fins of the heat dissipation member;
A first fan for exhaust disposed on the back plate of the housing;
Comprising
A cooling apparatus for electronic equipment, wherein the exhaust direction of the outside air passing through the heat dissipation member is changed by the first fan and the second fan. In a cooling device for an electronic device that cools a plurality of heat generating means through a fan in a housing and exhausts the outside of the housing,
An air vent disposed on the front surface of the casing or on the front surface side of the left and right side plates comprising a chassis and a cover;
In parallel with the panel on the chassis, the chassis is divided into a wide front space portion and a narrow rear space portion, and a partition plate having an opening hole formed at a substantially central position;
A power supply unit and a DVD drive unit and an HDD drive unit, which serve as the plurality of heat generating means, disposed in the chassis of the front space part;
A heat dissipating member having a CPU portion serving as the heat generating means and a fin disposed on the CPU portion, disposed in the chassis of the rear space portion;
A first exhaust fan disposed on the back plate on the CPU side;
A second fan for suction disposed on the chassis of the rear space portion so as to oppose the opening hole of the partition plate;
Comprising
The outside air is sucked from the air vent formed in the casing and the plurality of heat generating means disposed in the chassis of the front space portion is cooled by the outside air and sucked through the opening hole formed in the partition plate. The second fan exhausts the outside air from a direction inclined with respect to the longitudinal direction of the passage between the fins of the heat radiating member, exhausts the outside air to the outside of the casing through the first fan, and the CPU. A cooling apparatus for electronic equipment, wherein the direction of exhaust air passing through the heat dissipating member is changed.   3. The electronic device cooling apparatus according to claim 1, wherein a longitudinal direction of a passage between fins of the heat radiating member is inclined with respect to a direction of exhausting the outside air of the second fan.   The cooling device for an electronic device according to claim 1 or 2, wherein an exhaust direction of the outside air of the second fan is inclined with respect to a longitudinal direction of a passage between fins of the heat radiating member. In the cooling method of the electronic device that cools the plurality of heat generating means through the plurality of fans in the casing and exhausts the outside of the casing,
A first fan for exhausting at least the outside air in the housing and a second fan for sucking outside air;
A first sensor for detecting the outside air temperature of the casing and a second detection sensor for the heat generating means for detecting the temperature of the heat generating means;
A CPU for controlling the temperature of the first and second sensors;
Comprising
When both the first fan and the second fan rotate at a low speed, the CPU rotates the first fan and the second fan at a high speed if the first sensor and the second sensor reach a predetermined temperature or higher. When the first sensor and the second fan both rotate at a high speed, and the second sensor falls below a predetermined temperature, the CPU controls the first fan and the second fan to rotate at a low speed. A method for cooling an electronic device.   6. The method for cooling an electronic device according to claim 5, wherein when the power of the electronic device is set, the first fan and the second fan are stopped for a predetermined period of time by the CPU to silence the electronic device.

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