JP2010147261A - Blower and electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blower capable of reducing the size and thickness of a housing of an electronic apparatus; and to provide an electronic apparatus. <P>SOLUTION: By forming a second exhaust port 11a for exhausting gas by a second impeller 305 between a first intake 304a and a first exhaust port 304b of a first casing 304 when viewed from a direction parallel to a rotary shaft 302, flows of the gas sucked by a plurality of impellers rotating around the rotary shaft 302 can be clearly discriminated, and thereby both surfaces of a circuit board 10 or a plurality of electronic components mounted on the circuit board can be cooled by this single blower 11, whereby the size and thickness of a housing 6 can be reduced. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an air blower used in an electronic device and an electronic device.

  Electronic devices such as portable computers such as notebook personal computers are equipped with circuit boards on which electronic parts such as MPU (Micro Processing Unit) for processing various information such as characters, sounds and images are mounted. Yes. In recent years, in the field of this type of electronic equipment, the processing speed of electronic parts and the promotion of multi-functionality have been promoted. In such an electronic device, power consumption increases with the integration and performance of the electronic components, and the amount of heat generated during operation tends to increase rapidly.

  For this reason, when housing an electronic component with a large amount of heat generation in a housing of a portable computer, it is necessary to improve the heat dissipation of the electronic component in the housing. As an example of the structure for forcibly cooling the electronic components in the housing, the heat generated by the electronic components was transferred to the heat radiating fins by a heat pipe, and the heat radiating fins were cooled by the cooling fan. There is a heat dissipation device that dissipates heat (see Patent Document 1).

JP 2003-258472 A

  By the way, portable electronic devices such as portable computers are required to have smaller and thinner casings. However, when cooling electronic components mounted on both sides of a circuit board, or when a plurality of circuit boards are housed in a portable computer and the electronic components mounted on each circuit board are cooled, the above-mentioned Patent Document 1 describes. There is a problem that the heat dissipation device must be mounted on both sides of the circuit board or for each circuit board, and the housing of the electronic device cannot be reduced in size and thickness.

  This invention is made in view of the above, Comprising: It aims at providing the ventilation apparatus and electronic device which can achieve size reduction and thickness reduction of the housing | casing of an electronic device.

  In order to solve the above-described problems and achieve the object, the present invention includes a first impeller, one end portion provided around the first impeller and having a first air inlet, A first casing provided on the opposite side of the one end and having a first exhaust port formed thereon, a second impeller formed on an outer periphery of the first casing, And a second casing provided around the second impeller and having a second exhaust port formed between the first intake port and the first exhaust port.

  The present invention also provides a first impeller, a first casing provided around the first impeller and having a first exhaust port formed thereon, and a second impeller formed on the outer periphery of the first casing. And a second casing provided around the second impeller and formed with a second exhaust port, wherein the second exhaust port exhausts in a direction different from the exhaust direction from the first exhaust port. It is characterized by doing.

  In addition, the present invention is provided around the first impeller, the first impeller, one end portion where the first intake port is formed, and the first impeller, on the opposite side of the one end portion. A first casing having the other end formed with one exhaust port; a second impeller formed on an outer periphery of the first casing; and surrounding the second impeller. A blower including a second casing formed with a second exhaust port located between one intake port and the first exhaust port, and an electronic component positioned in the exhaust direction from the second exhaust port, And a board on which electronic components located in the exhaust direction from the first exhaust port are mounted.

  The present invention also provides a first impeller, a first casing provided around the first impeller and having a first exhaust port formed thereon, and a second impeller formed on the outer periphery of the first casing. And a second casing provided around the second impeller and formed with a second exhaust port, wherein the second exhaust port exhausts in a direction different from the exhaust direction from the first exhaust port. And an electronic component positioned in the exhaust direction from the second exhaust port, and a board on which the electronic component positioned in the exhaust direction from the first exhaust port is mounted.

  According to the present invention, there is an effect that the casing of the electronic device can be reduced in size and thickness.

  Exemplary embodiments of an air blower and an electronic apparatus according to the present invention will be explained below in detail with reference to the accompanying drawings. In this embodiment, an example in which an electronic device provided with a blower according to the present invention is applied to a notebook personal computer (hereinafter referred to as a portable computer) will be described. If it cools, it will not be limited to this. For example, the present invention can be applied to other electronic devices such as portable information terminals. In addition, the electronic apparatus can be variously modified and implemented without departing from the gist of the invention.

(First embodiment)
First, a schematic configuration of a portable computer according to the present embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a perspective view of the portable computer according to the first embodiment. FIG. 2 is a perspective view showing the inside of the casing of the portable computer according to the first embodiment.

  A portable computer 1 according to the present embodiment includes a main body 2 and a display unit 3.

  The main body 2 includes a main body base 4 and a main body cover 5. The main body cover 5 is combined with the main body base 4 from above. When the main body base 4 and the main body cover 5 cooperate with each other, the main body 2 includes a housing 6 formed in a box shape.

  The housing 6 has an upper wall 6a, a peripheral wall 6b, and a lower wall 6c. The upper wall 6 a supports the keyboard 7. The peripheral wall 6b has a front peripheral wall 6ba, a rear peripheral wall 6bb, a left peripheral wall 6bc, and a right peripheral wall 6bd.

  The display unit 3 includes a display housing 8 and a liquid crystal display panel 9 accommodated in the display housing 8. The liquid crystal display panel 9 has a display screen 9a. The display screen 9 a is exposed to the outside of the display housing 8 through the opening 8 a on the front surface of the display housing 8.

  The display unit 3 is supported by a rear end portion of the housing 6 via a hinge device. Thereby, the display unit 3 is rotatable between a closed position where the display unit 3 is tilted so as to cover the upper wall 6a from above and an open position where the display unit 3 stands so as to expose the upper wall 6a.

  The housing 6 is provided with an air blower 11 that exhausts gas, a heat radiating member 13 that radiates heat using the gas exhausted from the air blower 11, and a heat radiating member 13 that extends from the heat radiating member 13. 13 accommodates a circuit board 10 on which heat pipes 12 for transferring heat and electronic components 20 and 23 for generating heat are mounted on both sides.

  Here, the electronic components 20 and 23 are electronic components that execute various control processes of the portable computer 1, such as an MPU (Micro Processing Unit), a CPU (Central Processing Unit), a graphics chip, and various chip sets. . Note that the electronic components 20 and 23 are not limited to the above-described examples, and various electronic components that need to dissipate heat generated in accordance with execution of the control process are applicable.

  Further, it is assumed that the electronic component 20 is fixed to the circuit board 10 using a fixing tool 21. The fixture 21 includes a cover portion 21a that supports the electronic component 20, and a leg portion 21b that extends from the cover portion 21a toward the circuit board 10 and is screwed to the circuit board 10. The position of the electronic component 20 is fixed by being sandwiched between the circuit board 10 and the fixture 21. It is assumed that the electronic component 23 is fixed to the circuit board 10 by an adhesive member such as an instantaneous adhesive filled between the electronic component 23 and the circuit board 10.

  Next, the components mounted on the housing 6 and the details of the arrangement will be described with reference to FIGS. FIG. 3 is a perspective view of the blower according to the first embodiment. FIG. 4 is a cross-sectional view of the blower according to the first embodiment. FIG. 5 is a side view of the air blower according to the first embodiment. FIG. 6 is a cross-sectional view of the interior of the portable computer according to the first embodiment.

  The blower 11 is disposed in the vicinity of the left peripheral wall 6bc in the housing 6. For example, a plurality of exhaust holes 22 are provided in the left peripheral wall 6bc of the housing 6 corresponding to the blower 11. The exhaust hole 22 opens to the outside of the housing 6.

  As shown in FIGS. 3 to 5, the air blower 11 includes a motor 301, a rotating shaft 302, a first impeller 303, a first casing 304, a second impeller 305, and a second casing 306. .

  The motor 301 rotates a rotating shaft 302 described later in a counterclockwise direction. In this embodiment, an example in which the motor 301 is integrated with the blower 11 will be described. However, if the motor 301 is mounted in the portable computer 1 with a configuration capable of rotating a rotating shaft 302 described later, It may be mounted separately from the blower 11.

  The rotating shaft 302 is rotated counterclockwise by the motor 301.

  The first impeller 303 is attached to the rotation shaft 302 and rotates around the rotation shaft 302. In the present embodiment, the first impeller 303 sucks gas (indicated by reference numeral 501) from the axial direction of the rotating shaft 302 and exhausts gas (indicated by reference numeral 502) in the axial direction of the rotating shaft 302. ) Is an axial fan.

  In the present embodiment, the first impeller 303 is mounted on the rotation shaft 302 and the first impeller 303 is rotated. However, the first impeller 303 can be rotated around the rotation shaft 302. If possible, it is not limited to this. For example, a first casing 304 (to be described later) is mounted on the rotating shaft 302, and the first impeller 303 is rotated around the rotating shaft 302 by mounting the first impeller 303 on the inner wall surface of the first casing 304. You may let them.

  In the present embodiment, an axial fan is used as the first impeller 303. However, the present invention is not limited to this, and for example, gas is sucked from the axial direction of the rotating shaft 302, and A centrifugal fan that exhausts gas in a direction substantially orthogonal to the axial direction may be used for the first impeller 303.

  The first casing 304 is provided so as to surround the first impeller 303. In the present embodiment, the first casing 304 is a cylindrical body provided on the outer periphery of the first impeller 303 so as to surround it. In this embodiment, a cylindrical casing is used as the first casing 304. However, the first casing 304 is limited to this as long as it is a cylindrical casing formed so as to surround the outer periphery of the first impeller 303. Not what you want.

  The first casing 304 has one end (hereinafter referred to as a first end) 304c formed with a first intake port 304a for the first impeller 303 to suck in gas, and a first end 304c. The other end portion (hereinafter, referred to as a second end portion) 304d provided on the opposite side and having a first exhaust port for exhausting gas from the first impeller 303. In the present embodiment, the first casing 304 is formed with a first air inlet 304c at a first end 304c that is an end of the cylindrical casing in the axial direction of the rotating shaft 302. Further, the first casing 304 has a first exhaust port 304b at a second end 304d which is an end of the cylindrical casing opposite to the first end 304c in the axial direction of the rotating shaft 302. Is formed.

  In the present embodiment, since an axial fan is used as the first impeller 303, both the first intake port 304a and the first exhaust port 304b are ends in the axial direction of the rotating shaft 302 of the cylindrical casing. In the case where a centrifugal fan is used as the first impeller 303, the second exhaust port 304b is made to correspond to the direction substantially orthogonal to the axial direction of the rotating shaft 302, and the second end portion You may form in the side surface of the 1st casing 304 near 304d.

  The second impeller 305 rotates around a rotation shaft 302 that is the same rotation shaft as the first impeller 303, and is formed on the outer periphery of the first casing 304. In the present embodiment, the second impeller 305 is attached to the outer wall surface of the first casing 304, sucks gas (indicated by reference numeral 503) from the axial direction of the rotating shaft 302, and also the axial direction of the rotating shaft 302 And a centrifugal fan that exhausts gas (indicated by reference numeral 504) in a direction substantially perpendicular to the direction.

  In the present embodiment, the second impeller 305 is mounted on the outer wall surface of the first casing 304 and the second impeller 305 is rotated. However, the second impeller 305 is rotated around the rotation shaft 302. If it can be rotated, it is not limited to this. For example, the second casing 305 described later is mounted on the rotating shaft 302 and the second impeller 305 is rotated around the rotating shaft 302 by mounting the second impeller 305 on the inner wall surface of the second casing 306. You may let them.

  In this embodiment, a centrifugal fan is used as the second impeller 305. However, the present invention is not limited to this. For example, the first impeller 303 exhausts gas in the axial direction of the rotating shaft 302. Direction (that is, the second end 304d side of the first casing 304) and the direction in which the first impeller 303 sucks the gas (that is, the first end 304c side of the first casing 304). An axial fan that exhausts the gas that is sucked into the second impeller 305 may be used.

  Moreover, in this Embodiment, although the 1st impeller 303 and the 2nd impeller 305 are rotated centering on the same rotating shaft 302, it is not limited to this. For example, when the blower device 11 includes a plurality of motors, the first impeller 303 and the second impeller 305 may be rotated about different rotation axes.

  The second casing 306 is provided so as to surround the second impeller 305, and is located between the first intake port 304 a and the first exhaust port 304 b of the first casing 304 when viewed from the direction parallel to the rotation shaft 302. The second exhaust port 11a for the impeller 305 to exhaust the gas is formed. In the present embodiment, since the centrifugal fan is used for the second impeller 305, the second exhaust port 11a is interposed between the first intake port 304a and the first exhaust port 304b when viewed from the direction parallel to the rotation shaft 302. The second exhaust port 11a is formed between the first intake port 304a and the first exhaust port 304b, or the second exhaust port 11a is connected to the exhaust direction from the first exhaust port 304b. If it exhausts in a different direction, it will not be limited to this. For example, when an axial fan is used for the second impeller 305, the second casing 306 has a second exhaust port between the first intake port 304a and the first exhaust port 304b when viewed from the axial direction of the rotating shaft 302. It is assumed that 11a is formed.

  In the present embodiment, second casing 306 is a cylindrical casing that is formed integrally with motor 301 and is formed on the outer periphery of second impeller 305 so as to surround it. In the present embodiment, a cylindrical casing is used as the second casing 306. However, as long as it is a cylindrical casing formed so as to surround the outer periphery of the second impeller 305, the present invention is not limited thereto. Not what you want.

  Further, in the present embodiment, the second casing 306 has second intake ports 306a and 306b through which the second impeller 305 sucks in the gas in the axial direction of the rotating shaft 302, and is formed of a cylindrical casing. It is formed in the 1st end part 306c and the 2nd end part 306d which are both ends. Further, the second casing 306 is formed with a second exhaust port 11 a for exhausting the gas sucked from the second intake ports 306 a and 306 b in a direction substantially orthogonal to the axial direction of the rotating shaft 302. .

  In the present embodiment, since the centrifugal fan is used as the second impeller 305, the second exhaust port 11a is formed in a direction substantially orthogonal to the axial direction of the rotating shaft 302. When an axial fan is used as 305, the gas sucked from the second air inlet 306b is exhausted using the second air inlet 306a as an exhaust port. In the present embodiment, the second exhaust port 11 a is formed in a direction substantially orthogonal to the axial direction of the rotating shaft 302, but may be formed in a direction intersecting the axial direction of the rotating shaft 302.

  Further, in the present embodiment, as shown in FIG. 5, the second casing 306 has a length (indicated by reference numeral 505) in the axial direction of the rotation shaft 302 of the second end portion 306 d of the first casing 304. It is assumed that the length (indicated by reference numeral 506) of the second end 304d in the axial direction of the rotation shaft 302 is shorter. That is, the length of the first casing 304 in the axial direction of the rotation shaft 302 of the second end 304 d (indicated by reference numeral 506) is the axial direction of the rotation shaft 302 of the second end 306 d of the second casing 306. It is assumed that it is longer than the length (indicated by reference numeral 505). Thereby, the flow of the gas exhausted from the plurality of impellers rotating around the rotation shaft 302 can be more clearly distinguished.

  Although not shown, the second casing 306 has a length in the axial direction of the rotating shaft 302 of the first end 306 c that is a length in the axial direction of the rotating shaft 302 of the first end 304 c of the first casing 304. It may be shorter. That is, in the first casing 304, the length of the first end 304c in the axial direction of the rotating shaft 302 is longer than the length of the first end 306c of the second casing 306 in the axial direction of the rotating shaft 302. And Thereby, the flow of the gas sucked by the plurality of impellers rotating around the rotation shaft 302 can be clearly distinguished.

  In the present embodiment, both the first impeller 303 and the second impeller 305 inhale the gas in the housing 6 from the first intake port 304a and the second intake ports 306a and 306b. The first intake port 304 a or the second intake ports 306 a and 306 b may be connected to an intake port (not shown) connected to the outside of the housing 6 so that gas is sucked from the outside of the housing 6.

  In the present embodiment, the length in the axial direction of the rotation shaft 302 of the second end 304d of the first casing 304 is increased in the axial direction of the rotation shaft 302 of the second end 306d of the second casing 306. It is longer than the length of, but is not limited to this. For example, when an axial fan is used for the first impeller 303 and a centrifugal fan is used for the second impeller 305, the flow of gas exhausted from each fan is different, so the second end of the first casing 304 has Even if the length in the axial direction of the rotating shaft 302 of 304d and the length in the axial direction of the rotating shaft 302 of the second end 306d of the second casing 306 are the same, the flow of gas exhausted from each fan Can be clearly distinguished.

  As shown in FIGS. 2 and 6, the heat radiating member 13 radiates heat generated from various electronic components housed in the housing 6, and is located on the left side of the housing 6 from the circuit board 10. It arrange | positions in the vicinity of surrounding wall 6bc. In the present embodiment, the heat dissipation member 13 is disposed between the second exhaust port 11a of the blower 11 and the exhaust hole 22 of the left peripheral wall 6bc. The heat radiating members 13 extend in parallel to each other along the direction crossing the gas discharge direction from the blower 11.

  Further, the heat radiating member 13 is formed by assembling a plurality of fin elements 13a. The fin element 13a is a plate-like member formed in a rectangular shape, for example. The fin element 13a is made of a metal having a high thermal conductivity such as aluminum. The plurality of fin elements 13 a are arranged such that the plate surfaces are spaced from each other and the plate surfaces thereof follow the gas flow from the blower 11.

  The heat pipe 12 is a heat transfer member that extends from the heat dissipation member 13 and transfers heat to the heat dissipation member 13. The heat pipe 12 has, for example, a working fluid therein, and moves heat between both end portions using heat of vaporization and capillary action. In addition, in this Embodiment, although the heat pipe 12 was used as a heat-transfer member, it is not limited to this, Other members with high heat conductivity may be sufficient.

  In the present embodiment, the heat pipe 12 extends on the circuit board 10 from the position of the electronic component 20 toward the left peripheral wall 6bc of the housing 6. The heat pipe 12 extending toward the left peripheral wall 6bc of the housing 6 until the circuit board 10 is removed is bent toward the heat radiating member 13. And the front-end | tip part of the heat pipe 12 is extended along the 2nd exhaust port 11a of the air blower 11, and has skewed the several fin element 13a. In other words, the heat radiating member 13 is formed by fitting a plurality of fin elements 13 a having an opening in the center to the heat pipe 12.

  The circuit board 10 is positioned in the exhaust direction from the second exhaust port 11a formed in the second casing 306, and the heat radiating member 13 cooled by the gas exhausted from the second exhaust port 11a has the first mounting surface 10a. Has been implemented. In the present embodiment, the electronic component 20 is cooled via the heat dissipating member 13 and the heat pipe 12, but when the electronic component 20 is located in the exhaust direction from the second exhaust port 11a, The electronic component 20 may be directly cooled by the gas exhausted from the second exhaust port 11a. Further, in the present embodiment, the blower device 11 is mounted on the first mounting surface 10 a of the circuit board 10.

  In addition, the circuit board 10 can be inserted into the second end 304d of the first casing 304 provided in the blower device 11, and from the first exhaust port 304b formed in the second end 304d of the first casing 304. There is an insertion port 601 for exhausting gas to the second mounting surface 10b which is the back surface of the first mounting surface a. The circuit board 10 is positioned in the exhaust direction from the first exhaust port 304b formed in the second end 304d inserted into the insertion port 601, and the electronic component 23 cooled by the exhausted gas is It is mounted on the second mounting surface 10b. In the present embodiment, the insertion port 601 is provided in a circular shape along the A section of the cylindrical first casing 304. A plurality of exhaust holes 602 are provided in the lower wall 6 c of the housing 6 corresponding to the sending device 11. The exhaust hole 602 opens to the outside of the housing 6.

  In the present embodiment, the electronic component 23 mounted on the second mounting surface 10b of the circuit board 10 is cooled by the gas exhausted from the first exhaust port 304b of the first casing 304, but the first If it is an electronic component located in the exhaust direction from the exhaust port 304b, it can be cooled by the gas exhausted from the first exhaust port 304b of the first casing 304. For example, an electronic component mounted on another circuit board disposed on the second mounting surface 10b side of the circuit board 10 may be cooled by gas exhausted from the first exhaust port 304b of the first casing 304. .

  Thus, according to the portable computer 1 according to the present embodiment, the flow of gas exhausted from the plurality of impellers rotating around the rotation shaft 302 is clearly distinguished, and both sides of the circuit board 10 or a plurality of Since the electronic component mounted on the circuit board can be cooled by one air blower 11, the housing 6 can be reduced in size and thickness. Moreover, the flow of the gas exhausted from the blower 11 can be efficiently controlled in the narrow housing 6 where the intake area is limited.

(First modification)
In this modification, an axial fan is used for the first impeller and the second impeller. The description of the same configuration as that of the first embodiment is omitted, and only the configuration different from that of the first embodiment will be described.

  FIG. 7 is a perspective view of the air blower according to the first modification. FIG. 8 is a longitudinal sectional view of a blower device according to a first modification.

  The second impeller 701 is in the axial direction of the rotating shaft 302 and sucks gas (indicated by reference numeral 801) from the direction in which the first impeller 303 discharges gas, and is in the axial direction of the rotating shaft 302. Thus, the first impeller 303 is an axial fan that exhausts gas (indicated by reference numeral 802) in the direction of taking in the gas.

  The second casing 702 has a second intake port 702b for sucking gas in the axial direction of the rotating shaft 302, and the first end portion 304c in which the first intake port 304a of the first casing 304 is formed. It is formed at the second end 702d on the opposite side. Further, the second casing 702 has a second exhaust port 702a for exhausting the gas sucked from the second intake port 702b, and a second end 304d where the first exhaust port 304b of the first casing 304 is formed. Is formed at the first end 702c on the opposite side.

  Thus, according to the air blower according to the present modification, the gas exhausted from the first impeller 303 and the gas exhausted from the second impeller 701 flow in different directions, so that the rotation shaft 302 is the center. Since the flow of gas exhausted from a plurality of rotating impellers can be clearly distinguished and the electronic components mounted on both sides of the circuit board 10 or on the plurality of circuit boards can be cooled by a single blower 11. The casing 6 can be reduced in size and thickness.

(Second modification)
The second modification is another example in which an axial fan is used for the first impeller and the second impeller. In addition, description is abbreviate | omitted about the structure similar to a 1st modification, and only a structure different from a 1st modification is demonstrated.

  FIG. 9 is a longitudinal sectional view of a blower according to a second modification.

  The second impeller 900 sucks in gas (indicated by reference numeral 901) from the same direction as the direction of the axis of rotation 302, and the first impeller 303 inhales gas, and the axis of the axis of rotation 302 This is an axial fan that exhausts gas (indicated by reference numeral 902) in the same direction as the first impeller 303 exhausts the gas.

  In the second casing 903, a second intake port (not shown) for inhaling gas is in the axial direction of the rotating shaft 302, and the first intake port 304a of the first casing 304 is formed in the first casing 903. The first end 903c is formed on the same side as the end 304c. Further, the second casing 903 has a second exhaust port (not shown) for exhausting gas sucked from a second intake port (not shown), and a first exhaust port 304b of the first casing 304 is formed. The second end 903d is formed on the same side as the second end 304d.

  Thus, according to the air blower according to the present modification, the length in the axial direction of the rotation shaft 302 of the second end 304d of the first casing 304 is set to the length of the second end 903d of the second casing 903. When it is longer than the length of the rotating shaft 302 in the axial direction, even if the flow of gas exhausted from the first impeller 303 and the second impeller 900 is the same, the exhaust is exhausted from each exhaust port. The gas flow can be clearly distinguished.

(Third Modification)
In the third modification, the first impeller is mounted on the first casing. The description of the same configuration as that of the first embodiment is omitted, and only the configuration different from that of the first embodiment is described.

  FIG. 10 is a cross-sectional view of the blower according to the second modification. The first impeller 1001 is attached to the inner wall surface of the first casing 304. When the first impeller 1001 is mounted on the inner wall surface of the first casing 304 to rotate the first impeller 1001 around the rotation shaft 302, the first casing 304 is rotated by a support member (not shown). It is assumed that the shaft 302 is fixed.

  Thus, according to the air blower according to the present modification, the flow of gas exhausted from the plurality of impellers rotating about the rotation shaft 302 is clearly distinguished, and both sides of the circuit board 10 or the plurality of circuit boards are separated. Since the electronic component mounted on the housing can be cooled by the single air blower 11, the housing 6 can be reduced in size and thickness.

1 is a perspective view of a portable computer according to a first embodiment. It is a perspective view which shows the inside of the housing | casing of the portable computer concerning 1st Embodiment. It is a perspective view of the air blower concerning 1st Embodiment. It is a cross-sectional view of the air blower concerning 1st Embodiment. It is a side view of the air blower concerning 1st Embodiment. It is sectional drawing in the housing | casing of the portable computer concerning 1st Embodiment. It is a perspective view of the air blower concerning a 1st modification. It is a longitudinal cross-sectional view of the air blower concerning a 1st modification. It is a longitudinal cross-sectional view of the air blower concerning a 2nd modification. It is a cross-sectional view of the air blower concerning a 3rd modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Portable computer 10 Circuit board 11 Blower device 20,23 Electronic component 303,1001 1st impeller 304 1st casing 305,701,900 2nd impeller 306,702,903 2nd casing

Claims (12)

The first impeller,
One end portion provided around the first impeller and provided with a first air inlet, and the other end portion provided on the opposite side of the one end portion and formed with a first exhaust port; A first casing having
A second impeller formed on the outer periphery of the first casing;
A second casing provided around the second impeller and having a second exhaust port formed between the first intake port and the first exhaust port;
The air blower characterized by comprising. The first impeller,
A first casing provided around the first impeller and having a first exhaust port;
A second impeller formed on the outer periphery of the first casing;
A second casing provided around the second impeller and formed with a second exhaust port,
The air blower characterized in that the second exhaust port exhausts in a direction different from an exhaust direction from the first exhaust port.   The blower according to claim 1 or 2, wherein the first impeller and the second impeller rotate about the same rotation shaft. In the first casing, the first intake port and the first exhaust port are formed in the axial direction of the rotation shaft of the first impeller,
The blast according to any one of claims 1 to 3, wherein the second casing has a second intake port and a second exhaust port formed in an axial direction of a rotation shaft of the second impeller. apparatus. In the first casing, the first intake port and the first exhaust port are formed in the axial direction of the rotation shaft of the first impeller,
The second casing has a second intake port formed in the axial direction of the rotation shaft of the second impeller, and the second exhaust port formed in a direction intersecting the axial direction of the rotation shaft. The air blower according to any one of claims 1 to 3.   The blower according to any one of claims 1 to 5, wherein the first impeller is mounted on an inner wall surface of the first casing. The first impeller,
One end portion provided around the first impeller and provided with a first air inlet, and the other end portion provided on the opposite side of the one end portion and formed with a first exhaust port; A first casing having
A second impeller formed on the outer periphery of the first casing;
A second casing provided around the second impeller and having a second exhaust port formed between the first intake port and the first exhaust port;
A blower comprising:
An electronic component positioned in the exhaust direction from the second exhaust port, and a substrate on which the electronic component positioned in the exhaust direction from the first exhaust port is mounted;
An electronic device characterized by comprising: The first impeller,
A first casing provided around the first impeller and having a first exhaust port;
A second impeller formed on the outer periphery of the first casing;
A second casing provided around the second impeller and formed with a second exhaust port,
The second exhaust port is a blower that exhausts in a direction different from the exhaust direction from the first exhaust port;
An electronic component positioned in the exhaust direction from the second exhaust port, and a substrate on which the electronic component positioned in the exhaust direction from the first exhaust port is mounted;
An electronic device characterized by comprising:   The electronic apparatus according to claim 7, wherein the first impeller and the second impeller rotate about the same rotation axis. In the first casing, the first intake port and the first exhaust port are formed in the axial direction of the rotation shaft of the first impeller,
10. The electron according to claim 7, wherein the second casing is formed with a second air inlet and the second air outlet in an axial direction of a rotation shaft of the second impeller. machine. In the first casing, the first intake port and the first exhaust port are formed in the axial direction of the rotation shaft of the first impeller,
The second casing has a second intake port formed in the axial direction of the rotation shaft of the second impeller, and the second exhaust port formed in a direction intersecting the axial direction of the rotation shaft. The electronic device according to any one of claims 7 to 9.   The electronic device according to claim 7, wherein the first impeller is mounted on an inner wall surface of the first casing.

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