JP2002118388A - Radiator and electronic equipment having radiator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radiator capable of enhancing the radiating efficiency with a simple structure at a low cost and an electronic equipment having the radiator. SOLUTION: Radiator 30 disposed in electronic equipment 10 radiates heat from a heat generator P in the equipment 10 out of the equipment 10. The radiator 30 comprises a motor 40, a fan 42 rotated by the motor 40, a heat pipe 46 receiving a flow of the air obtained by the fan 42 to remove heat from the generator P, a heat sink for radiating heat of the pipe 46, a sheet metal base member 50 for holding the heat sink and the pipe 46, and a sheet metal cover member 52 for holding the motor 40 and forming a channel 100 of the air by a base member 50.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat radiating device for radiating heat from a heat generating portion used in an electronic device or the like and an electronic device having the heat radiating device.

[0002]

2. Description of the Related Art As electronic devices, for example, portable computers and portable information terminals have appeared. Due to the demand for miniaturization and thinning of this type of electronic device, the thickness of the housing of the electronic device has become thinner and smaller. For this reason, the circuit board and the heat generating portion housed in the housing require considerable contrivance. As a heat generating unit housed in a housing, for example, a CPU (Central Processing Unit) generates a considerable amount of heat during operation, but heat generated from the heat generating unit is directly transmitted to a heat sink. ing. The heat transmitted to the heat sink is transmitted to the heat pipe, which is far away from the heat generating unit, and the heat transmitted to the heat pipe is discharged to the outside of the housing by wind generated by the fan. The motor that rotates the fan is stored in the case,
The conventional case is made of aluminum die casting, casting, or the like, and is further covered as a fan cover provided with a hole for air inflow. As a measure against noise, the structure for adjusting the air flow path is made of an aluminum die-cast case.

[0003]

However, in this type of conventional heat radiating device, the use of a case made of aluminum die casting or casting not only leads to an increase in cost but also a problem of a large number of parts. There is. SUMMARY OF THE INVENTION It is an object of the present invention to provide a heat radiating device and an electronic device having the heat radiating device which can solve the above-mentioned problems, can reduce the cost, have a simple structure and can improve the heat radiation efficiency.

[0004]

According to a first aspect of the present invention, there is provided a heat radiating device disposed in a device for discharging heat from a heat generating portion in the device to the outside of the device, comprising: a motor;
A fan rotated by the motor, a heat pipe for receiving the flow of air obtained from the fan, and removing heat from the heat generating unit, a heat sink for radiating heat of the heat pipe, and the heat sink A heat dissipation device comprising: a sheet metal base member that holds the heat pipe; and a sheet metal cover member that holds the motor and forms an air flow path with the base member. In claim 1, the fan is rotated by the motor. The heat pipe receives the flow of air obtained from the fan and removes heat from the heat generating unit. The heat sink dissipates the heat of the heat pipe. The base member holds the heat sink and is made of sheet metal. The cover member holds the motor and forms an air flow path with the base member, and is made of sheet metal. Accordingly, the cost can be reduced by using a sheet metal base member and a cover member with a simple structure. The air flow path can be formed by a sheet metal base member and a sheet metal cover member.

According to a second aspect of the present invention, in the heat radiating device according to the first aspect, the heat sink is disposed at one end of the heat pipe, and the other end of the heat pipe is connected to the cover member and the base member. It is exposed outside. According to the second aspect, a heat sink is arranged at one end of the heat pipe, and the other end of the heat pipe is exposed outside the cover member and the base member. As a result, the portion arranged on the heat sink side is directly connected to the heat sink on the heat radiation side of the heat pipe, so that the heat radiation efficiency is improved. In addition, by exposing the exposed side to the heat receiving portion of the heat pipe, the heat pipe can be brought into direct contact with the heat source, and a space around the heat pipe can be secured, thereby increasing design flexibility.

According to a third aspect of the present invention, in the heat radiating device according to the first aspect, the motor is mounted so as to be suspended inside the cover member, and the cover member covers the base member. . According to the third aspect, the motor is suspended from the inside of the cover member, and the cover member covers the base member.
This eliminates the need for a fan or motor housing because of the suspension structure, and simplifies the structure. Also,
Because the cover member only covers the base member,
The cover can be easily attached and detached. That is, assembly and replacement of the fan motor are facilitated.

According to a fourth aspect of the present invention, in the heat radiating device according to the first aspect, a peripheral portion of the cover member corresponding to the fan has a circumferential shape, and a center position of the circumference is a rotation center of the fan. The fan cover is in a state where it does not need to match with the fan cover. According to claim 4, a peripheral portion of the cover member corresponding to the fan has a circumferential shape,
The center position of the circumference is a fan cover that may or may not match the rotation center of the fan. As a result, turbulence of the air flow can be prevented, the heat radiation effect can be enhanced by the smooth flow of the air, and noise can be reduced.

According to a fifth aspect of the present invention, in the radiator according to the first aspect, the heat pipe is disposed at a position corresponding to the fan, and the heat pipe is embedded in a groove of the base member. According to the fifth aspect, the heat pipe is disposed at a position corresponding to the fan, and the heat pipe is embedded in the groove of the base member. Thus, by eliminating the step between the heat pipe and the inner surface of the base member, turbulence of the air flow is prevented, and the heat radiating effect is enhanced by the smooth flow of the air, so that noise reduction can be achieved.

According to a sixth aspect of the present invention, in the heat radiating device according to the fifth aspect, an exposed surface of the heat pipe is flush with an inner surface of the base member. In claim 6, the exposed surface of the heat pipe is flush with the inner surface of the base member. Accordingly, the exposed surface of the heat pipe and the inner surface of the base member are leveled, thereby making it possible to further reduce the level difference, thereby increasing the static pressure of the fan and improving the heat radiation efficiency.

According to a seventh aspect of the present invention, there is provided an electronic device having a heat radiating device for releasing heat from a heat generating portion in the electronic device to the outside of the electronic device, wherein the heat radiating device includes a motor and the motor A fan rotated by the fan, a heat pipe for receiving the flow of air obtained from the fan, and removing heat from the heat generating unit, a heat sink for dissipating heat of the heat pipe, the heat sink and the heat An electronic device having a heat radiating device, comprising: a sheet metal base member that holds a pipe; and a sheet metal cover member that holds the motor and forms an air flow path with the base member. In claim 7, the fan is rotated by the motor. The heat pipe receives the flow of air obtained from the fan and removes heat from the heat generating unit.
The heat sink dissipates the heat of the heat pipe. The base member holds the heat sink and is made of sheet metal. The cover member holds the motor and forms an air flow path with the base member, and is made of sheet metal. Accordingly, the cost can be reduced by using a sheet metal base member and a cover member with a simple structure. The air flow path can be formed by a sheet metal base member and a sheet metal cover member.

According to an eighth aspect of the present invention, in the electronic device having the heat radiating device according to the seventh aspect, the heat sink is disposed at one end of the heat pipe, and the other end of the heat pipe is connected to the cover member. It is exposed outside the base member. According to claim 8, a heat sink is disposed at one end of the heat pipe, and the other end of the heat pipe is exposed outside the cover member and the base member. This allows
The portion arranged on the heat sink side is the heat radiation side of the heat pipe, and the heat pipe is directly connected to the heat sink, so that the heat radiation efficiency is enhanced. In addition, by exposing the exposed side to the heat receiving portion of the heat pipe, the heat pipe can be brought into direct contact with the heat source, and a space around the heat pipe can be secured, thereby increasing design flexibility.

According to a ninth aspect of the present invention, in the heat radiating device according to the seventh aspect, the motor is mounted so as to be suspended inside the cover member, and the cover member covers the base member. . According to the ninth aspect, the motor is suspended from the inside of the cover member, and the cover member covers the base member.
This eliminates the need for a fan or motor housing because of the suspension structure, and simplifies the structure. Also,
Because the cover member only covers the base member,
The cover can be easily attached and detached. That is, assembly and replacement of the fan motor are facilitated.

According to a tenth aspect of the present invention, in the electronic device having the heat radiating device according to the seventh aspect, a peripheral portion of the cover member corresponding to the fan has a circular shape, and a center position of the circumference is the same as that of the electronic device. The fan cover is in a state where it may or may not match the rotation center of the fan. According to the tenth aspect, the peripheral portion of the cover member corresponding to the fan has a circumferential shape, and the center position of the circumference may or may not coincide with the rotation center of the fan. It has become. As a result, turbulence of the air flow can be prevented, the heat radiation effect can be enhanced by the smooth flow of the air, and noise can be reduced.

According to an eleventh aspect of the present invention, in the electronic device having the radiator according to the seventh aspect, the heat pipe is disposed at a position corresponding to the fan, and the heat pipe is embedded in a groove of the base member. ing. Claim 1
In 1, the heat pipe is disposed at a position corresponding to the fan, and the heat pipe is embedded in the groove of the base member. Thus, by eliminating the step between the heat pipe and the inner surface of the base member, turbulence of the air flow is prevented, and the heat radiating effect is enhanced by the smooth flow of the air, so that noise reduction can be achieved.

According to a twelfth aspect of the present invention, in the electronic device having the radiator according to the eleventh aspect, an exposed surface of the heat pipe is flush with an inner surface of the base member. In claim 12, the exposed surface of the heat pipe is flush with the inner surface of the base member. Accordingly, the exposed surface of the heat pipe and the inner surface of the base member are leveled, thereby making it possible to further reduce the level difference, thereby increasing the static pressure of the fan and improving the heat radiation efficiency.

[0016]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Note that the embodiments described below are preferred specific examples of the present invention,
Although various technically preferable limits are given, the scope of the present invention is not limited to these modes unless otherwise specified in the following description.

FIG. 1 shows a preferred embodiment of an electronic apparatus having a heat radiating device according to the present invention. This electronic device 1
0 is, for example, a portable personal computer. The electronic device 10 has a main body 12 and a display unit 14. The display unit 14 can use, for example, a liquid crystal display device. The main body 12 and the display unit 14 are connected by a hinge 18, and the display unit 14 can be opened and closed with respect to the main body 12. The main body 12 has an input device 16 such as a keyboard and a housing 20. The input device 16 has a plurality of keys 19 and the like.

The heat radiating device 30 according to the embodiment of the present invention, other circuit boards, and the like are incorporated in the housing 20 of FIG. FIG. 2 is a view showing a preferred embodiment of the heat dissipation device 30 of FIG. FIG. 3 is an exploded perspective view of the heat dissipation device 30 of FIG. FIG. 4 is a view of the heat radiating device 30 of FIG. 2 viewed substantially from above, and FIG. 5 is an exploded perspective view of the heat radiating device 30 of FIG. As shown in FIGS. 1 and 2, the housing 20 has a heat outlet 32, and a heat dissipation device 30 is incorporated in the housing 20 corresponding to the outlet 32. Heat dissipation device 3
Reference numeral 0 denotes a motor 40, a fan 42, a heat sink 44, a heat pipe 46 which is a kind of heat transfer element, a base member 50, a cover member 52, and another plate-shaped member 54, as schematically shown in FIG. Etc.

As shown in FIG. 3, the cover member 52 and the base member 50 are formed by forming a sheet metal. As a material, for example, copper or aluminum having excellent heat conductivity, or aluminum subjected to alumite treatment is used. Can be adopted. That is, the cover member 52 and the base member 50 are made of only a sheet metal without using the conventionally used aluminum die casting or casting, and by devising the sheet metal shape, the flow of air generated by the rotation of the fan 42 is improved. Can be adjusted to reduce noise, and cost can be reduced as compared with aluminum die casting and casting.

The heat dissipating device 30 shown in FIG.
It has a function of efficiently releasing the heat generated by the electronic element P, which is the heat generating unit disposed at 0, to the outside through the outlet 32 of the housing 20. The cover member 52 is also called a cover plate, and the base member 50 is also called a base plate. The cover member 52 includes the motor 4
0 is installed. On the other hand, the base member 50 has the heat sink 44 and the heat pipe 46 mounted thereon. The electronic element P is located below the base member 50, as shown in FIG.
Is mounted on the substrate 300 as shown in FIG.

FIG. 9 shows an operation example of the heat pipe used in the embodiment of the present invention. The heat pipe 46 has a container 144. The working fluid 160 is stored in the container 144. This working fluid 160
When heated in the heating unit 170, the steam becomes a steam flow 180 and moves to the cooling unit 190 side. The container 144 is a sealed container, usually using a metal pipe, and the inside is evacuated. The working fluid is a liquid such as pure water or Freon. When the working fluid 160 is heated by the heating unit 170 and the other end of the container 144 is the cooling unit 190, the working fluid 160 in the container 144 is boiled and the steam flow 1
Heat is transferred through the exchange of latent heat, resulting in a cycle of 80 movements, condensation and reflux.

The motor 40 may have a structure as shown in FIG. 6, for example. This motor 40
Is a so-called dynamic pressure bearing type motor, which is thin and has a one-way blowing structure. The motor 40 is arranged in the opening 60 of the cover member 52 shown in FIG. 3, and the opening 60 has, for example, a circular shape. Motor 40
Has a rotor 70 and a stator 72 as shown in FIG. The rotor 70 has a shaft 74, a fan 42, a driving magnet 78 and a rotor yoke 80. The fan 42 is also called a blade, and the plurality of fans 42
They are arranged at equal intervals around the periphery of the rotor yoke 80. The driving magnet 78 is provided on the rotor yoke 80.

The stator 72 includes a base 82, a dynamic pressure bearing 8
4, a thrust receiver 86, a substrate 88, a yoke 90, and a coil 92. The dynamic pressure bearing 84 is, for example, a metal oil-impregnated bearing, and is fixed to the base 82 by, for example, caulking. The dynamic pressure bearing 84 rotatably holds the shaft 74. The dynamic pressure bearing 84 fixes a thrust receiver 86 to receive a thrust force at the end of the shaft 74. A substrate 88 is provided around the dynamic pressure bearing 84, and a coil 92 is attached to a yoke 90 of the substrate 88. Since the S pole and the N pole are multipolar magnetized in the magnet 78, when the coil 92 is energized from the outside in a predetermined energizing pattern via the substrate 88, the magnetic field of the magnet 78 and the coil 92 The interaction of the generated magnetic fields causes the rotor 70 to rotate continuously about the central axis CL of the shaft 74 with respect to the stator 72. When the rotor 70 rotates continuously, the fan 42
Air can be sent toward the air flow path 100 formed by the cover member 52 and the base member 50 along the W direction through the opening 60 of the cover member 52 in FIG.

The base 82 of the stator 72 shown in FIG.
As shown in FIG. 3, three projections are formed at predetermined angles, for example, and are fixed to the periphery of the opening 60, and the motor 40 is attached to the cover member 52 so as to be suspended. . The three bases 82 are fixed to the outer surface 52A of the cover member 52 by, for example, an adhesive. Therefore, the fan 42 is
Located inside.

The base member 50 shown in FIG. 3 has rising portions 50A and 50B.
A heat sink 44 is attached between A and 50B. The heat sink 44 is provided on the inner surface 50 of the base member 50.
It is fixed so as to be thermally adhered to C. A groove 110 is formed in the center of the base member 50, and the heat pipe 46 is embedded in the groove 110.
The state where the heat pipe 46 is embedded is shown in FIG. One end 112 of the heat pipe 46 in FIG. 3 is in thermal contact with the heat sink 44, the other end 114 of the heat pipe 46 is open, and the other end 114 is surrounded by the cover member 52 and the base member 50. Air flow path 100
Is located outside. One end 112 of the heat pipe 46 and the heat sink 44 in FIG. 3 have reached a position near the outlet 32 of the housing 20.

The base member 50 has a step 120. The height H of the step 120 is substantially the same as the thickness D of the heat pipe 46, for example. The exposed surface 126 of the heat pipe 46 is flush with the inner surface 50C of the base member 50. As described above, the inner surface 50C of the base member 50 and the exposed surface 126 of the heat pipe 46 are arranged flush with each other, and the exposed surface 126 of the heat pipe 46 is arranged immediately below the fan 42 on the cover member 52 side. The flow can be prevented from remaining, noise can be reduced, and the heat radiation efficiency can be improved by increasing the static pressure of the fan.

Since a part of the heat pipe 46 is embedded in the base member 50 by providing the step 120, the contact area between the heat pipe 46 and the base member 50 can be increased, and the heat radiation efficiency can be increased. As described above, the base member 50 in FIG. 3 has the step portion 120 provided in the middle, and has an inner surface 50C and another inner surface 50D. The other end 1 of the heat pipe 46 is provided on the inner surface 50D.
14 is protrudingly mounted. This makes it possible to directly contact the heat pipe with the heat source,
In addition, the space around the heat pipe can be secured, and the degree of freedom in design is expanded. The base member 50 includes the mounting portions 131, 1
The mounting portions 131 and 132 are fixed to the inner surface of the housing 20 by, for example, screws.

The heat sink 44 shown in FIG. 3 has a plurality of fins 44A. These fins 44A are formed so as to rise toward the inner surface side of the cover member 52. The heat sink 44 is made of, for example, aluminum, aluminum or copper subjected to anodizing. The cover member 52 has, on a part thereof, a circumferential portion 130 formed around the central axis CL of the motor 40. By forming a part of the cover member 52 as the circumferential part 130 in this manner, the circumferential part 130 can be formed in such a manner as to be narrowed down to a substantially semicircular shape in accordance with the outer shape of the fan 42, The turbulence of the flow can be prevented, the air flow can be made smooth, the heat radiation efficiency can be increased, and noise can be reduced. That is, by forming at least a part of the cover member 52 into a round shape using the circumferential portion 130, the flow of air can be made smooth, the heat radiation efficiency can be increased, and noise can be reduced.

Next, an assembling method and an operation example of the above-described heat radiating device 30 will be described. The base 82 of the motor 40 is fixed to the sheet metal cover member 52 of FIG. 3 by an adhesive to the outer surface 52A of the cover member 52. At this time, the central axis CL of the motor 40 may or may not coincide with the central portion forming the circumferential portion 130. That is, the peripheral portion of the cover member 52 has a circular shape, and the cover member 52 is a fan cover in a state where the center position of the circumference may or may not coincide with the rotation center of the fan 42. . On the other hand, the inner surface 5 of the sheet metal base member 50
At the end of 0A, a heat sink 44 is fixed between the rising portions 50A and 50B with an adhesive. The heat pipe 46 is preferably formed in a straight shape in order to increase the heat transfer efficiency, and is preferably disposed directly below the fan 42, so that the heat sink 44 and the heat pipe 46 are integrally formed by an adhesive.

The inner surface of the cover member 52 is
The cover member 52 and the base member 50 are integrated with each other, and if necessary, the cover member 52 and the base member 50 are fastened with screws or mechanical caulking. In this case, the cover member 52 is mounted only on a portion corresponding to the inner surface 50 </ b> C side of the base member 50, and the inner surface 50 </ b> D of the base member 50 and the other end 114 of the heat pipe 46 are inside the cover member 52. It is exposed without entering. Thereby, the heat pipe can be brought into direct contact with the heat source, a space around the heat pipe can be secured, and the degree of freedom in design is increased. The inner surfaces 52C and 52D of the cover member 52 are formed by drawing, and the inner surface 52C and the exposed surface 126 of the heat pipe 46 are flush.

When the coil 92 of the motor 40 shown in FIG.
When the fan 42 rotates at the same time, the cover member 5 shown in FIG.
2, air is taken in the W direction from the opening 60, and the air passes through the heat sink 44 in FIG.
Is released to the outside through The heat generated by the electronic element P is transmitted through the heat transfer element 140 to the heat pipe 46 embedded in the base member 50 as shown in FIG. While being radiated by the heat sink 44 of FIG. 3, the heat generated by the electronic element P can be released from the heat extraction port 32 to the outside of the housing 20 by the flow of air flowing through the air flow path 100 by the fan 42.

At this time, looking at the flow of air from the fan 42, if the air becomes turbulent, noise is likely to be generated. However, in the embodiment of the present invention, since a part of the cover member 52 is the circumferential portion 130, the flow of the air around the fan 42 is not a turbulent flow but a laminar flow.
Moreover, by eliminating the step between the inner surface 50C, which is the air shielding surface immediately below the fan 42, and the exposed surface 126 of the heat pipe 46, the residual air is prevented. From this, it is possible to smooth the air flow and reduce the noise generated when the fan 42 rotates.

Unlike the embodiment shown in FIG. 7, another embodiment of the present invention as shown in FIG. 8 can be adopted. In this case, the heat pipe 46 is not embedded in the base member 50, and in this embodiment, the noise generated by the air when the fan 42 rotates slightly increases. However, according to the embodiment shown in FIG. 7, the static pressure of the fan 42 is improved, and the contact area between the heat pipe 46 and the base member 50 is increased.
Also, heat conduction from the base member 50 to the base member 50 is promoted, and the heat radiation efficiency can be improved.

The present invention is a heat radiating device for releasing heat generated from an electronic element, and a structure for making the flow of air generated at the time of rotation of a cooling fan close to a laminar flow is formed only in the shape of a sheet metal. This heat dissipation device is also called a heat sink.

By manufacturing the cover part and the base part of the heat sink with a sheet metal pressed product, the cost can be reduced. By making the shape of the cover around which the cooling fan is mounted an R shape, turbulence of the air flow can be prevented, and noise can be reduced. By eliminating the step between the heat pipe and the base plate located directly below the fan, turbulence of the air flow can be prevented,
It leads to low noise. Eliminating the step between the heat pipe and the base plate located directly below the fan increases the static pressure of the fan, which leads to higher heat dissipation efficiency. By embedding the heat pipe in the groove of the base plate, the contact area between the heat pipe and the plate can be increased, leading to an increase in heat radiation efficiency.

The present invention is not limited to the above embodiment. In the above-described embodiment, a portable personal computer is shown as an example of an electronic device to which the heat dissipation device is attached. However, the present invention is not limited to this, and includes a portable information terminal, a game device, a telephone, a video camera, and the like. It is a thing. Further, an electronic element that generates heat may directly contact both or one of the heat pipe and the heat sink without passing through the heat transfer element. The reason why the heat transfer element is interposed is to increase the thermal adhesion between the electronic element and the base portion to increase the heat transfer efficiency. The heat-generating electronic elements are not limited to CPUs (Central Processing Units), but can be applied to power transistors, motor driver ICs (integrated circuits), and the like.

[0037]

As described above, according to the present invention,
The cost can be reduced, the structure is simple, and the heat radiation efficiency can be increased.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a portable computer as an example of an electronic apparatus having a heat dissipation device of the present invention.

FIG. 2 is an exemplary perspective view showing a preferred embodiment of a heat radiating device arranged in the electronic apparatus of FIG. 1;

FIG. 3 is an exploded perspective view of the heat dissipation device of FIG. 2;

FIG. 4 is a perspective view of the heat dissipation device as viewed from substantially above.

FIG. 5 is an exploded perspective view of the heat dissipation device.

FIG. 6 is a diagram showing a structural example of a motor.

FIG. 7 is a diagram showing a positional relationship among a fan, a base member, and a heat pipe.

FIG. 8 is a diagram showing another embodiment of the present invention.

FIG. 9 illustrates an example of a heat pipe.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Electronic device, 20 ... Case, 30 ... Heat dissipation device, 40 ... Motor, 42 ... Fan, 44 ...
・ Heat sink, 46 ・ ・ ・ Heat pipe, 50 ・ ・ ・
Base member, 52: cover member, P: electronic element (heat generating portion), 100: air flow path, 110:
Groove of base member, 120 ... step

 ──────────────────────────────────────────────────続 き Continuation of the front page (71) Applicant 000153214 Nippon Keiki Seisakusho Co., Ltd. 1-13-6 Minamigahara, Ota-ku, Tokyo (72) Inventor Junichi Ogasawara 6-7-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Inside (72) Inventor Shun Kayama 6-7-35 Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation Inside (72) Inventor Mitsunori Sano 6-35, Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation Inside the company (72) Inventor Shigeo Yoshikawa 1-24-19 Taiga Building, Suigami-ku, Tokyo Taguchi Building LSI Cooler Co., Ltd. (72) Inventor Takashi Suzumura 1-6-1 Otemachi, Chiyoda-ku, Tokyo Hitachi Cable Corporation Inside the company (72) Inventor Hironori Kitajima 1-6-1, Otemachi, Chiyoda-ku, Tokyo Inside Hitachi Cable Corporation (72) Inventor Hidetoshi Shinozawa Ota-ku, Tokyo Kugahara 1-13-6 stock company Nippon Keiki Seisakusho in the F-term (reference) 5E322 AA01 AA11 BA01 BA03 BA04 BB02 BB03 BC03 DB10 5F036 AA01 BA08 BB01 BB05 BB33 BB35 BB37 BB60 BC31

Claims (12)

[Claims] 1. A radiator disposed in a device for releasing heat from a heat generating unit in the device to the outside of the device, a motor, a fan rotated by the motor, and the fan A heat pipe for receiving heat from the heat generating portion, receiving a flow of air obtained from the heat pipe, a heat sink for radiating heat of the heat pipe, a base member of a sheet metal holding the heat sink and the heat pipe, A sheet metal cover member that holds the motor and forms an air flow path with the base member. 2. The heat dissipation device according to claim 1, wherein the heat sink is disposed at one end of the heat pipe, and the other end of the heat pipe is exposed outside the cover member and the base member. 3. The heat radiating device according to claim 1, wherein the motor is mounted so as to be suspended inside the cover member, and the cover member covers the base member. 4. A state in which a peripheral portion of the cover member corresponding to the fan has a circumferential shape, and a center position of the circumference may or may not coincide with a rotation center of the fan. The heat dissipation device according to claim 1, wherein the heat dissipation device is a fan cover. 5. The heat dissipation device according to claim 1, wherein the heat pipe is disposed at a position corresponding to the fan, and the heat pipe is embedded in a groove of the base member. 6. The heat radiator according to claim 5, wherein an exposed surface of the heat pipe is flush with an inner surface of the base member. 7. An electronic device having a heat radiating device for releasing heat from a heat generating unit in the electronic device to the outside of the electronic device, wherein the heat radiating device includes a motor, and a fan rotated by the motor. A heat pipe for receiving heat from the heat generating portion in response to an air flow obtained from the fan; a heat sink for radiating heat of the heat pipe; a sheet metal for holding the heat sink and the heat pipe An electronic apparatus having a heat radiating device, comprising: a base member; and a sheet metal cover member that holds the motor and forms an air flow path with the base member. 8. The heat dissipation device according to claim 7, wherein the heat sink is disposed at one end of the heat pipe, and the other end of the heat pipe is exposed outside the cover member and the base member. Electronic equipment. 9. The heat radiating device according to claim 7, wherein the motor is mounted to be suspended inside the cover member, and the cover member covers the base member. 10. A fan according to claim 5, wherein a peripheral portion of said cover member corresponding to said fan has a circular shape, and a center position of said circumference may or may not coincide with a rotation center of said fan. An electronic device having the heat radiating device according to claim 7, which is a cover. 11. The electronic apparatus according to claim 7, wherein the heat pipe is disposed at a position corresponding to the fan, and the heat pipe is embedded in a groove of the base member. 12. The electronic apparatus according to claim 11, wherein an exposed surface of the heat pipe is flush with an inner surface of the base member.