JP3070382U - CPU air cooling system - Google Patents

Abstract

(57) [Summary] A conventional air cooling device has an insufficient cooling effect of a CPU and is not efficient. In addition, when an exhaust device or an intake device is added, power consumption increases. A heat sink (22) abutting a CPU (21) mounted on a substrate (12), a fan device (25) having a built-in fan capable of blowing air toward the heat sink, and forcibly discharging air inside a housing (11) to the outside. Exhaust means 15 for
And a plurality of intake holes 18 formed in a housing body located near the fan device when the fan device is installed in the housing, and a plurality of air intake holes 18 extending from the air intake holes to the fan device. Outside air circulation part 3 which constitutes a hollow part in the range
0, an outside air introduction port 31 that is open to a size that can surround a part or all of the intake hole in the outside air circulation part,
An external air supply port 32 is provided which is opened in a shape that allows a part of the fan device to be fitted.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a CPU air cooling device, and more particularly to a device that cools a CPU inside a housing by inflowing air outside the housing by a negative pressure ventilation system that forcibly exhausts air inside the housing. .

[0002]

[Prior art]

 A conventional CPU air-cooling device has only a heat sink provided so as to abut a CPU mounted on a substrate, or has a fan device provided to be able to blow air to the heat sink. All of these heat sinks or fan devices were installed in contact with or near the CPU inside the housing.

[0003]

[Problems to be solved by the invention]

 However, in the above configuration, since the air passing around the heat sink is the air inside the housing, the temperature is generally high already, and the air is heated by another circuit provided on the substrate. The temperature generated by the CPU was higher than the temperature of the air to be cooled, so that the temperature was slightly cooled. Moreover, in recent years, the amount of heat generated by CPUs has been increasing due to the sharp increase in the clock frequency, and a sufficient cooling effect cannot be expected with a conventional air-cooling device, and the heat radiation by the heat sink increases. To do so, the heat sink itself had to be enlarged.

Therefore, recently, when it is determined that the above-described air-cooling device alone is not sufficient, an air-cooling device in which the capacity of the exhaust means is increased or the number of the exhaust means is increased has been developed. ing. However, in the case of strengthening the exhaust means as described above, a drive means such as a motor is added to the exhaust means, and these drive means cause an increase in the amount of heat generated. When a motor is used as the driving means, there is a new problem that power consumption increases.

[0005] Furthermore, recently, a structure in which an intake means is provided outside the housing to increase the amount of inflow of outside air is being developed. However, since a projection exists outside the housing, the appearance of the housing is increased. In addition to the problem of lowering the size, there is also a problem that the periphery of the housing becomes complicated.

In view of the above points, an object of the present invention is to provide an air cooling device that can efficiently cool a CPU without using an exhaust device or the like while using a conventional negative pressure ventilation type air cooling device. And

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the air cooling device of the present invention includes a heat sink in contact with a CPU mounted on a substrate, a fan device having a built-in fan capable of blowing air toward the heat sink, and air inside the housing. In a CPU air cooling device provided with an exhaust means for forcibly discharging the air to the outside, a plurality of intake holes formed in a housing body located near the fan device when the fan device is installed inside the housing. A hole, an outside air circulating portion constituting a hollow portion in a range from the intake hole to the fan device, and an outside air introduction opening having a size capable of surrounding part or all of the intake hole in the outside air circulating portion. The air outlet and an outside air supply opening formed in such a shape that a part of the fan device can be fitted. With such a configuration, a part of the outside air flowing into the inside of the housing can be concentrated on the CPU, and the air cooling effect can be improved.

In this air cooling device, it is preferable that the outside air supply port is formed in a shape capable of surrounding a fan built in the fan device. As a result, the outside air flowing in the outside air circulation portion is provided to the fan device. This allows the air to flow to the nearest point, which improves the air cooling efficiency of the CPU.

Further, the outside air circulating section forms the entire shape of the outside air circulating section into a substantially rectangular parallelepiped, and the outside air supply port is formed on a bottom surface of the rectangular parallelepiped, and can be in contact with a lid of a housing. If the outside air circulation hole has a contact surface formed on the upper surface of the rectangular parallelepiped, the outside air circulation portion is sandwiched between the fan device and the lid of the housing, so that a special mounting device is used. It can be installed inside the housing without the need for.

Further, when the outside air inlet is an outside air inlet having a tongue protruding from the opening end of the outside air inlet, the outside air inlet is brought into contact with the inner surface of the housing side. When this occurs, the tongue portion is elastically deformed, and the external air flow portion is supported between the side of the housing and the fan device by the urging force associated with the elastic force. It can be installed in a detachable state.

[0011] In addition, since the outside air circulation portion is made of polycarbonate, a suitable elastic force and strength can be obtained, and an outside air circulation portion excellent in impact resistance can be obtained. In addition, since the outside air circulation unit is arranged above the fan device due to its configuration, it may not be possible to determine at a glance the status of the CPU and the like after installation, but polycarbonate is not transparent. Because of its superiority, the problems described above do not occur.

[0012]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view showing an embodiment of the present invention and a use state. In FIG. 1, 1 is a personal computer main body, and 11 is a housing. 21 is a CPU, 22 is a heat sink, 25 is a fan device, and 30 is an outside air circulation unit. As shown in FIG. 1, a substrate 12 is provided inside a housing 11, and a CPU socket 13 is mounted on the substrate 12. The CPU 21 is connected to the board 12 via the CPU socket 13 by being mounted on the CPU socket 13. Further, in addition to the above, a place where a memory module (not shown), a hard disk drive, an expansion board, and the like can be mounted is prepared in the housing 11 in advance. Further, a riser card 14 for mounting an expansion board is provided. The riser card 14 may not be provided depending on the mounting method of the expansion board.

An exhaust means 15 is provided inside the housing 11 together with a main power supply. The exhaust means 15 includes a fan (not shown) so that air can be exhausted toward the back of the personal computer 1. The fan is rotated by a motor built in the exhaust means 15. The exhaust means 15 is housed in a casing to distinguish it from other devices inside the housing 11, and a main power supply is also built in the casing. Further, a slit 17 is provided on a side surface of the casing, so that air inside the housing 11 can flow into the casing. An exhaust port 16 for forcibly exhausting air by the fan of the exhaust means 15 is open at the back of the housing 11, and intake holes 18, 19 for allowing outside air to flow into the interior of the housing 11. It is provided on the back of the housing 11. Therefore, after the necessary components are mounted inside the housing 11, the upper portion and the side portions are closed by a lid or the like. The outside air flows into the inside of the housing 11 by the pressure ventilation, and the air inside the housing 11 can be cooled. Therefore, the air holes 18 and 19 are formed by drilling a large number of holes at distant locations on the back surface of the housing 11. One of the intake holes 18 and 19 is provided near a place where the CPU 21 is mounted, and the other is provided near a place where other devices are installed. Therefore, the outside air at this time flows first into the vicinity of the CPU and secondly into the vicinity of other devices to realize air cooling of these devices.

Further, a heat sink 22 is in contact with the upper surface of the CPU (the surface on which the pins are not provided), and a fan device 25 is provided above the heat sink 22 (see FIG. 2). The heat sink 22 is provided with a heat radiating section 23, and a heat transfer plate 24 is provided at a position where the heat sink 22 is in contact with the CPU 21. The heat dissipating portion 23 is sandwiched between the heat transfer plate 24 and the fan device 25, and fins are formed on the entire side surface exposed at an intermediate portion thereof, and the shape thereof is a cross section bent at many places. It is almost wavy. A large number of grooves are formed in parallel from the fan device 25 to the heat transfer plate 24 by the substantially wavy portion of the heat radiating portion 23. The fan device 25 has a built-in fan (see FIG. 2), has an opening at the top, and has a built-in motor for rotating the fan. Then, by the normal rotation of the fan, air can be sucked from above the opening, and the sucked air can be blown toward the heat radiating portion 23 of the heat sink 22. At this time, most of the wind blown from the fan is discharged to the outside of the heat sink 22 while passing along the groove of the heat radiating portion 23 in the heat sink 22, and the heat of the heat radiating portion 23 can be lowered. is there.

Power must be supplied to the motor for rotating the fan of the fan device 25, and a power connector 26 for supplying the power is projected to the side of the fan device 25. Has been established. Further, as described above, the mounting member 27 is provided for the purpose of bringing the heat sink 22 into contact with the upper surface of the CPU 21 and preventing the heat sink 22 from separating from the fan device 25. The mounting member 27 is composed of an annular pressing portion 28 and two hooking arms 29. The pressing portion 28 is brought into contact with the vicinity of the opening of the fan device 25, and the tip of the hooking arm 29. Can be hooked on the CPU socket 13 on the substrate 12 (see FIG. 2). With this mounting member 27, the heat sink 22 and the fan device 25 can be lightly pressed against the CPU 21, and the easy detachment can be prevented.

Further, an outside air circulation unit 30 is provided above the fan device 25. The overall shape of the outside air circulating section 30 is formed in a substantially rectangular parallelepiped, and the inside is hollow. One side surface of the substantially rectangular parallelepiped forming the outside air circulation portion 30 is open, and this opening constitutes the outside air inlet 31. That is, by bringing the housing 11 into contact with the vicinity of the intake hole 18, the opening end can surround the whole of the intake hole 18. This outside air can be introduced into the hollow inside of the outside air circulation unit 30. In addition, the bottom surface of the outside air circulation unit 30 configured as a substantially rectangular parallelepiped as described above is adapted to be fitted with the upper part (the intake opening) of the fan device 25, and is connected to the hollow inside of the outside air circulation unit 30. The opening of the fan device 25 can be continuous. At this time, on the bottom surface of the substantially rectangular parallelepiped of the outside air circulating section 30, an outside air supply port 32 having a shape capable of fitting around the opening of the fan device 25 is provided. When the parts are fitted, the opening is opened in the hollow inside of the outside air circulation part 30.

Here, the above-mentioned fitting is in a state having some play unlike the tight fitting. This is because the outside air circulating section 30 of the present embodiment is made of polycarbonate, so that it is difficult to precisely perform the outside air circulating section 30. This is because there is a slight difference. In the case where the shape of the fan device 25 is largely different, it is natural that the shape of the outside air supply port 32 needs to be changed according to the shape.

The outside air circulating section 30 is provided with a tongue piece 33 at a portion of the edge of the outside air inlet 31 that is continuous with the bottom surface. The tongue piece 33 has an action of eliminating play when the fan device 25 is fitted to the outside air supply port 32. That is, as shown in FIG. 2, when the outside air inlet 31 is brought into contact with the inner surface of the housing 11, the tongue piece 33 is pressed against the inner surface of the housing 11. It is elastically deformed from the surface to the direction of the fan device (the direction of the arrow in the figure). With this elastic deformation, the tongue piece 33 urges the entire outside air circulation section 30 in a direction away from the inner surface of the housing 11. By this biasing, the edge of the outside air supply port 32 of the outside air circulation part 30 is partially forcibly brought into contact with a part of the fan device 25, whereby the play between the outside air supply port 32 and the fan device 25 is made. Can be removed. Therefore, the external air supply port 32 does not need to be precisely machined, and can be used even when the shape of the fan device 25 is slightly different. Further, as described above, by removing the play of the fitting, it becomes difficult for the outside air circulating portion 30 to be detached from the fan device 25, and since no fixture or the like is used, the attachment and detachment can be freely performed. Thus, the fan device 25 can be replaced with a different type of fan device 25, and can be replaced with another outside air circulation portion 30 having an outside air supply port 32 having a shape suitable for the replaced fan device 25.

Further, due to the above-mentioned urging accompanying the deformation of the tongue piece, the entire outside air circulation unit 30 is slightly deformed. That is, since a compressive load acts in the longitudinal direction of the outside air circulation portion 30, the thin polycarbonate constituting the outside air circulation portion 30 is curved, and the upper surface and the lower surface of the substantially rectangular parallelepiped form the outer surface. It is slightly deformed, similar to expanding in the direction. As a result, a part of the upper surface of the substantially rectangular parallelepiped forming the outside air circulation portion 30 is raised. Therefore, when the lid 40 is mounted after mounting each component inside the housing 11, the ridge is pressed by the lid 40, thereby resisting the elastic force of the tongue piece 33 against the outside air inlet 31. The edge can be brought into contact with the inner surface of the housing 11, and the gap between the inner surface of the housing 11 and the outside air inlet 31 can be reduced.

From the above configuration, the operation mode of the present embodiment is as follows. First, the internal pressure of the housing 11 is reduced by forcibly exhausting the air in the housing 11 by the exhaust means 15 built in the housing 11, whereby outside air flows in through the air intake holes 18 and 19. Here, the air flowing from the intake hole 18 located near the CPU 21 passes through the hollow inside of the outside air circulation unit 30. The flowing air is guided by the fan device 25, and the fan device 25 can blow a large amount of outside air to the heat radiating portion 23 of the heat sink 22.

The air blown to the heat radiating portion 23 is released from the groove of the heat radiating portion 23 to the outside of the heat sink 22, and circulates inside the housing 11 while being mixed with the air flowing from the other air intake holes 19. Then, the air is discharged to the outside of the housing 11 by the exhaust means 15. In this case, since much outside air can be blown to the heat sink 22, the air cooling efficiency of the CPU 21 can be improved. Further, since the number of motors is the same as in the conventional case, there is no factor that leads to an increase in the temperature inside the housing 11.

[0022]

[Effects of the Invention] Since the present invention has the above-described configuration, a sufficient air cooling effect can be obtained even with a negative pressure ventilation type air cooling device using a conventionally used exhaust means. . Therefore, power consumption does not increase, and mounting of equipment that induces heating inside the housing can be avoided. In particular, since the efficiency of the fan device used for cooling the CPU can be improved, it is possible to cool the current CPU whose clock frequency has increased dramatically. Further, since there is no change outside the housing, there is no factor in compromising the periphery without impairing the appearance.

Further, since the outside air circulation portion of the present invention has an outside air supply port to which a part or the whole of the fan device can be fitted, the outside air circulation portion can be mounted by this fitting. Therefore, the outside air circulation unit can be freely attached and detached, which is suitable when the outside air circulation unit needs to be replaced, such as when the mounting position of the CPU inside the housing is different or when the shape of the fan device is different. In addition, due to the presence of the tongue piece provided in the outside air introduction port, the tongue piece is pressed against the inner surface of the housing near the intake hole when the outside air circulation part is attached. Due to the elastic deformation, the entire external circulation part can be urged in a direction away from the inner surface of the housing. This bias presses a part of the edge of the outside air supply port against a part of the fan device, so that the mounting state of the outside air circulation unit can be stabilized.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an embodiment.

FIG. 2 is an explanatory diagram showing an introduction state of outside air.

[Brief description of reference numerals]

 DESCRIPTION OF SYMBOLS 1 Personal computer main body 11 Case 12 Substrate 13 CPU socket 15 Exhaust means 18 and 19 Intake hole 21 CPU 22 Heat sink 25 Fan device 30 Outside air circulation part 31 Outside air introduction port 32 Outside air supply port 33 Tongue piece

Claims (5)

[Utility model registration claims] 1. A heat sink in contact with a CPU mounted on a substrate, a fan device having a built-in fan capable of blowing air toward the heat sink, and exhaust air for forcibly exhausting air inside the housing to the outside. And a plurality of air intake holes formed in a housing body located near the fan device when the fan device is installed inside the housing, and a plurality of air intake holes extending from the air intake hole to the fan device. The outside air circulation part which forms a hollow part in the range, the outside air introduction port which is open to a size capable of surrounding part or all of the intake hole in the outside air circulation part, and a part of the fan device are fitted. A CPU air cooling device comprising: an outside air supply port that is opened in a shape that can be formed. 2. The CPU air cooling device according to claim 1, wherein the outside air supply port is formed in a shape capable of surrounding a fan built in the fan device. 3. The outside air circulation section forms the entire shape of the outside air circulation section into a substantially rectangular parallelepiped, and the outside air supply port is formed on the bottom surface of the rectangular parallelepiped, and can be brought into contact with a lid of a housing. The CPU air cooling device according to claim 1, wherein the contact surface is an outside air circulation portion having an upper surface of the rectangular parallelepiped. 4. The CPU air cooling device according to claim 1, wherein the outside air introduction port is an outside air introduction port having a tongue piece projecting from an opening end of the outside air introduction port. 5. The CPU air cooling device according to claim 1, wherein the outside air circulation unit is made of polycarbonate.