WO2004059174A1 - 吸気口が形成されたケースを有する送風装置、送風装置を備えた冷却ユニットおよび電子機器 - Google Patents
吸気口が形成されたケースを有する送風装置、送風装置を備えた冷却ユニットおよび電子機器 Download PDFInfo
- Publication number
- WO2004059174A1 WO2004059174A1 PCT/JP2002/013529 JP0213529W WO2004059174A1 WO 2004059174 A1 WO2004059174 A1 WO 2004059174A1 JP 0213529 W JP0213529 W JP 0213529W WO 2004059174 A1 WO2004059174 A1 WO 2004059174A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- impeller
- case
- air
- blower
- pressure
- Prior art date
Links
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4213—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/20—Cooling means
- G06F1/203—Cooling means for portable computers, e.g. for laptops
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/42—Fillings or auxiliary members in containers or encapsulations selected or arranged to facilitate heating or cooling
- H01L23/427—Cooling by change of state, e.g. use of heat pipes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/46—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids
- H01L23/467—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements involving the transfer of heat by flowing fluids by flowing gases, e.g. air
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
Definitions
- a blower having a case with an intake port, a cooling unit having the blower, and an electronic device
- the present invention relates to a blower that discharges air sucked into the center of rotation of an impeller from the outer periphery of the impeller, a cooling unit equipped with the blower, and a portable computer equipped with the blower. Related to such electronic equipment.
- the heat generated by micro-processors used in electronic devices has increased as processing speeds have increased and multifunctionality has increased.
- conventional electronic devices are equipped with a cooling unit that forcibly cools the microphone port processor
- the cooling unit is housed in the housing of the electronic device together with the microprocessor.
- This cooling unit includes a heat sink that is thermally connected to the microprocessor, and a centrifugal blower that blows cooling air to the heat sink.
- the blower is composed of a rotating impeller and a case for accommodating the impeller.
- the case includes a suction port facing the rotation center of the impeller, a spiral chamber surrounding the impeller, and a discharge port located at a downstream end on the winding end side of the spiral chamber.
- the air discharged from the outer periphery of the impeller is collected in a spiral chamber and sent to the discharge port.
- the air pressure in the spiral chamber gradually increases as the spiral chamber moves from the winding start position to the winding end position, and rapidly decreases immediately before the discharge port.
- a high-pressure portion having the highest air pressure is formed near the end of the spiral chamber.
- the air inlet having a perfect circular opening shape is arranged coaxially with the impeller, and the opening edge of the air inlet is connected to the spiral chamber.
- the high air pressure in the swirl chamber may exceed the suction force of the air acting on the intake port. What happens when you blow it out of the case. In other words, air leaks from the intake port of the case, and the air drawn in from the intake port cannot be efficiently guided to the discharge port
- Japanese Patent Application Laid-Open No. 10-3269686 J discloses a fan device for preventing air from blowing out from an intake port.
- the fan device is provided around the outer periphery of an impeller.
- a ring is provided and the ring The airflow is prevented by rectification.
- Another object of the present invention is to provide a cooling unit having a blower for preventing air leakage from an intake port with a simple structure.
- a further object of the present invention is to provide a cooling unit having a simple structure. The purpose is to obtain an electronic device having a blower that can prevent air leakage from the mouth.
- a blower according to one embodiment of the present invention includes:
- the case comprising a rotating impeller and a case for accommodating the impeller, has at least one round air inlet for guiding air to the center of rotation of the impeller, and an outer periphery of the upper b impeller. And a discharge port where the air discharged from the air gathers.
- the opening edge of the intake ⁇ is located at a position corresponding to the high pressure portion where the air pressure in the case is highest, at the center of rotation of the impeller.
- the shape of the opening of the above-mentioned intake port is increased by the presence of the It is characterized by being non-circular.
- a portion of the opening edge of the intake port corresponding to the high-pressure portion in the case projects in a direction away from the high-pressure portion, so that it is difficult for the air in the service pressure portion to blow out from the intake port.
- FIG. 1 is a perspective view of a portable computer according to a first embodiment of the present invention.
- Figure 2 is a perspective view of the portable computer showing a cooling unit that cools the microprocessor inside the housing.
- Fig. 3 is a perspective view showing the positional relationship between the cooling unit and the microprocessor.
- Fig. 4 is an exploded perspective view of the cooling unit.
- Fig. 5 is a plan view of the blower showing the shape of the opening of the intake port.
- FIG. 6 is a cross-sectional view taken along the line F6-F6 in FIG.
- FIG. 7 is a cross-sectional view of the blower, showing the positional relationship between the shape of the intake port and the high-pressure section where the air pressure is highest.
- Fig. 8 is a cross-sectional view of the air blower showing the pressure distribution in the case.
- Fig. 9 is a plan view of the air blower showing the air flow velocity distribution in the air intake when the air intake opening has a non-circular shape.
- FIG. 10 is a plan view of the blower g showing the air flow velocity distribution in the intake port when the intake ⁇ having a true circular opening shape is arranged coaxially with the impeller.
- FIG. 11 is a plan view of a blower according to a second embodiment of the present invention.
- FIGS. 1 to 10 applied to a mobile computer.
- FIGS. 1 and 2 disclose a portable computer 1 as a slave device.
- the portable computer 1 is a computer 2 and a display supported by the computer 2. 3 and
- the main body 2 has a flat box-shaped housing: 4.
- the housing 4 has a bottom wall 4a, an upper wall 4b, a front wall 4c, and left and right side walls 4d.
- the top wall 4b supports the keyhole H5
- the display 3 is a liquid crystal display panel housed in the display housing 6 with the display housing 6.
- the display housing 6 having the structure 7 is rotatably connected to the rear end of the housing 4 via a hinge (not shown).
- the liquid crystal display panel 7 has a display screen 7a3 ⁇ 4 :.
- the display screen 7 a is exposed to the outside of the display housing 6 from an opening 8 on the front surface of the display housing 6.
- the housing 4 houses a printed circuit board 10 and a cooling unit 20.
- the printed circuit board 10 is arranged along the bottom wall 4 a of the housing 4.
- the semiconductor package 11 as a heating element is mounted on the upper surface of the printed circuit board 10 of the semiconductor package 11. It constitutes the core microprocessor of UYU1.
- This semiconductor package 11 has a base substrate 12 and an IC chip 13.
- the base substrate 12 is soldered to the upper surface of the printed circuit board 10.
- the IC chip 13 is mounted at the center of the upper surface of the base substrate 12.
- the IC chip 13 generates a very large amount of heat during operation, and requires cooling to maintain stable operation.
- the cooling unit 20 is for forcibly cooling the semiconductor package 11. As shown in FIGS. 2 to 4, the cooling unit 20 includes a heat receiving block 21, a heat sink 22, a heat pipe 23, and a centrifugal blower 24.
- the heat receiving block 21 has a shape slightly larger than the IC chip 13.
- the heat receiving block 21 is supported by a printed circuit board 10 via a spring member 25.
- the spring member 25 has a pressing plate 26 and four legs 27.
- the pressing plate 26 is fixed to the upper surface of the heat receiving block 21 via a screw 28.
- the legs 27 radially project from the four corners of the pressing plate 26.
- the ends of the legs 27 are fixed to the four bosses 29 on the printed circuit board 10 via screws 30.
- the legs 27 elastically urge the heat receiving block 21 fixed to the pressing plate 26 toward the semiconductor package 11. As a result, the heat receiving block 21 is pressed against the IC chip 13 and is thermally connected to the IC chip 13.
- the above-mentioned heat sink 22 has many heat radiating fins 32. I have.
- the heat sink 22 is located along the left side wall 4 d of the housing 4 and the exhaust opening
- the heat pipe 23 has one end 23a and the other end 23b.
- One end 23 a of the heat pipe 23 is thermally connected to the heat receiving block 21.
- the other end 23 b of the heat pipe 23 is thermally connected to the heat sink 22. For this reason, the heat of the IC chip 13 is transmitted to the heat receiving block 21, and then transmitted to the heat sink 2 via the heat pipe 23.
- the centrifugal air blower 24 includes a flat box-shaped case 35 and an impeller 36 housed in the case 35. It is composed of a case body 37 and a cover plate 38.
- the case body 37 has a bottom plate 39 and a side plate 40 rising from the outer peripheral edge of the bottom plate 39.
- the bottom plate 39 and the lid plate 38 each have a disk shape and constitute an outer wall of the case 35.
- the side plate 40 is curved in an arc shape to form a peripheral wall of the case 35.
- the lid plate 38 is fixed to the upper end of the side plate 40 and faces the bottom plate 39 of the case body 37.
- Case 35 has a pair of round air inlets 42a, 42b and one outlet 43.
- One air inlet 42a is a lid plate.
- the other air intake port 4 2 b which opens at the center of
- the discharge port 43 is open in the side plate 40 of the case body 37 and has an elongated opening shape extending in the radial direction of the case 35.
- the heat sink 22 is a case. It is disposed at a position opposite to the discharge port 43 of 35, and is interposed between the discharge port 43 and the exhaust port 33.
- the impeller 36 has a cylindrical pos portion 45 and a plurality of blades 46 protruding tangentially from the outer peripheral surface of the pos portion 45.
- the impeller 36 is interposed between the bottom plate 39 and the lid plate 38 of the case 35, and the boss portion 45 and the root of the blade 46 are connected to the intake port 42a, It is opposite to 4 2 b.
- the impeller 36 is supported by a motor support portion 44 of a bottom plate 39 via a motor 47.
- the motor 47 rotates the impeller 36 in a counterclockwise direction, as indicated by arrows in FIGS. 5 and 7. Due to this rotation, a negative pressure acts on the intake ⁇ 42 a and 42 b,
- the case 35 has a spiral chamber 48 surrounding the impeller 36.
- the swirling chamber 48 collects the air discharged from the outer periphery of the impeller 36 and It has the function of converting the velocity energy of this air into pressure energy.
- the shape of the spiral of the spiral chamber 48 is defined by a side plate 40 of the case body 37, and the side plate 40 surrounds the impeller 36.
- the spiral chamber 48 has a winding start position P1 and a winding end position P2.
- the winding start position P 1 is adjacent to one end 43 a of the discharge port 43 along the longitudinal direction.
- the winding end position P2 is located at a predetermined angle 0 from the winding start position P1 in the rotation direction of the impeller 36, and the extension of the discharge port 43 is on an extension of the winding end position P2.
- the other end 4 3b along the direction is located.
- the distance d between the outer periphery of the impeller 36 and the side plate 40 is the smallest at the winding start position P1, and the distance d from the winding start position P1 to the winding end position P2 increases. It is increasing gradually.
- FIG. 8 shows the pressure distribution in the case 35 when the impeller 36 rotates.
- the air pressure (Pa) in the case 35 is lowest at the base of the blade 46 near the rotation center of the impeller 36 and near the discharge port 43, and The height of the spiral chamber 48 gradually increases from the winding start position P 1 to the winding end position P 2 along the rotation direction of the car 36.
- the air pressure (Pa) in the case 35 increases as approaching the side plate 40 located at the outermost periphery of the spiral chamber 48.
- the high-pressure section 49 where the air pressure (Pa) becomes the highest is a spiral chamber 48 Of the winding end position P1 from the winding start position P1 in the direction of the winding end position P2, more specifically, from the intermediate portion P3 between the winding start position P1 and the winding end position P2. Also exists in the region shifted in the direction of the winding end position P2.
- FIG. 7 shows an area where the high-pressure portion 49 is formed, based on the positional relationship between the case 35 and the impeller 36.
- the center of rotation of the impeller 36 is point A
- the position of the other end 43b of the discharge port 43 is point B
- the position of one end 43a of the discharge port 43 is point C
- the above point B is shown.
- X is a straight line connecting points C and C
- Y is a straight line passing through point A above, and is orthogonal to straight line X
- Z is a straight line connecting point ⁇ ⁇ to the winding end position P2
- Y is a straight line connecting the straight line Y and side plate 40.
- the high-pressure part 49 in the spiral chamber 48 is located in the area PAD surrounded by the end point P2, the point A and the point D.
- This area PAD coincides with an area shifted in the direction of the end position P2 from the intermediate portion P3 between the winding start position P1 and the winding end position P2.
- the opening edges of the intake ports 42 a and 42 b are respectively formed in arc-shaped portions toward the rotation center (point A) of the impeller 36 at positions corresponding to the high pressure portion 49 of the spiral chamber 48. It has an overhanging extension 50.
- the area excluding the extension 50 is a circle centered on the point A and coaxial with the impeller 36. ing.
- the curvatures of the intake ports 42a and 42b change at the locations corresponding to the high-pressure sections 49, and the intake ports 42a and 42 b has a non-opening shape as shown in Fig. 5. It is a perfect circle.
- the extension 50 is located at an intermediate portion along the rotation direction of the impeller 36, and the rotation center of the impeller 36 is
- the overhang toward (point A) is the largest.
- the distance L between the intermediate portion of the extension portion 50 and the rotation center (point A) of the impeller 36 is the shortest, and the extension portion 5
- the counter pressure part 49 is located on the extension of a straight line that passes through the middle part of 0 and the rotation center of the impeller 36.
- FIG. 9 has a non-circular intake ⁇ 42 a, 42 b; S ;
- the flow velocity distribution of the air passing through the intakes P 42 a and 42 b is shown.
- FIG. 10 shows that the air passing through the air holes 42 a and 42 b when the air holes 42 a and 42 b are formed to be a perfect circle coaxial with the impeller 36. The flow velocity distribution is shown.
- the pressure of the air flowing outside of this range is a negative pressure, from which air is sucked into the center of rotation of the impeller 36.
- the spiral chamber 4 8 starts from near the winding end position P2 of the spiral chamber 48.
- the positive pressure flow velocity distribution is observed over a wide range up to the winding start position P 1 in FIG.
- air leakage from the intake ports 42a, 42b is prevented by simply changing the opening shape of the intake ports 42a, 42b. be able to. Therefore, the structure of the impeller 36 is not complicated and the number of parts is not increased, and the cost can be reduced and the inexpensive centrifugal blower 24 can be obtained.
- the air sucked from the inlets 42 a and 42 b can be efficiently guided to the outlet 43.
- the cooling efficiency of the heat sink 22 facing the outlet 43 is improved, and the cooling performance of the semiconductor package 11 is improved. Be able to
- the shape of the opening of the intake port is made to be non-circular by extending the portion of the opening edge of the intake port toward the rotation center of the impeller.
- the present invention is not limited thereto.
- the intake port is a perfect circle that forms the f1 axis with the impeller
- a leak prevention sheet may be attached to the lid plate and the bottom plate of the case having squares, and a portion corresponding to the high-pressure part of the swirling chamber in the open P edge of the intake port may be covered with the sheet.
- the opening functions as an extension that protrudes from the opening edge of the intake port toward the rotation center of the impeller, and the open shape of the intake port is non-circular. Therefore, similarly to the first embodiment, it is possible to prevent air leakage from the air inlet.
- FIG. 11 illustrates the second embodiment of the present invention by 1 ⁇ J TJs.
- the shape of the intake port 55 is increased.
- the basic configuration of 4 is the same as that of the first embodiment. Therefore, in the second embodiment, the same components as those of the first embodiment are denoted by reference numerals. , Omit its explanation
- the 3S core blower 24 is viewed on a plane viewed from the cover plate 38 of the case 35.
- the part corresponding to the high-pressure part 49 in the opening edge of 55 protrudes toward the rotation center (point A) of the impeller 36.
- the air leak from an inlet can be prevented with a simple structure, and the air taken in from an inlet can be efficiently guided to an outlet while solving a cost problem.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Mechanical Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Thermal Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02793387A EP1593853A4 (en) | 2002-12-25 | 2002-12-25 | FAN WITH HOUSING WITH FEEDING OPENING, COOLING UNIT AND ELECTRONIC DEVICE WITH FAN |
CN02821645.8A CN100572824C (zh) | 2002-12-25 | 2002-12-25 | 带空气口外壳内的吹风装置,包含该吹风装置的冷却单元及电子装置 |
JP2004562851A JPWO2004059174A1 (ja) | 2002-12-25 | 2002-12-25 | 送風装置、送風装置を備えた冷却ユニットおよび電子機器 |
PCT/JP2002/013529 WO2004059174A1 (ja) | 2002-12-25 | 2002-12-25 | 吸気口が形成されたケースを有する送風装置、送風装置を備えた冷却ユニットおよび電子機器 |
US10/424,051 US6781835B2 (en) | 2002-12-25 | 2003-04-25 | Air-applying device having a case with an air inlet port, a cooling unit having the air-applying device, and an electronic apparatus having the air-applying device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2002/013529 WO2004059174A1 (ja) | 2002-12-25 | 2002-12-25 | 吸気口が形成されたケースを有する送風装置、送風装置を備えた冷却ユニットおよび電子機器 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004059174A1 true WO2004059174A1 (ja) | 2004-07-15 |
Family
ID=32652507
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2002/013529 WO2004059174A1 (ja) | 2002-12-25 | 2002-12-25 | 吸気口が形成されたケースを有する送風装置、送風装置を備えた冷却ユニットおよび電子機器 |
Country Status (5)
Country | Link |
---|---|
US (1) | US6781835B2 (ja) |
EP (1) | EP1593853A4 (ja) |
JP (1) | JPWO2004059174A1 (ja) |
CN (1) | CN100572824C (ja) |
WO (1) | WO2004059174A1 (ja) |
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JP2006170090A (ja) * | 2004-12-16 | 2006-06-29 | Toshiba Home Technology Corp | 送風装置 |
WO2007102226A1 (ja) * | 2006-03-09 | 2007-09-13 | Fujitsu Limited | 送風装置および電子機器並びにそれらの制御方法 |
JP2009015385A (ja) * | 2007-06-29 | 2009-01-22 | Fujitsu Ltd | 電子機器 |
JP2009186816A (ja) * | 2008-02-07 | 2009-08-20 | Canon Inc | 電気機器 |
WO2011067855A1 (ja) * | 2009-12-04 | 2011-06-09 | 富士通株式会社 | 電子機器および放熱モジュール |
WO2016133014A1 (ja) * | 2015-02-19 | 2016-08-25 | 株式会社日本自動車部品総合研究所 | 遠心送風機 |
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JPWO2016133014A1 (ja) * | 2015-02-19 | 2017-07-20 | 株式会社Soken | 遠心送風機 |
Also Published As
Publication number | Publication date |
---|---|
US6781835B2 (en) | 2004-08-24 |
CN1578879A (zh) | 2005-02-09 |
JPWO2004059174A1 (ja) | 2006-04-27 |
EP1593853A4 (en) | 2007-06-27 |
CN100572824C (zh) | 2009-12-23 |
EP1593853A1 (en) | 2005-11-09 |
US20040123978A1 (en) | 2004-07-01 |
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