US20080226472A1 - Air Blower - Google Patents

Air Blower Download PDF

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Publication number
US20080226472A1
US20080226472A1 US10/589,303 US58930305A US2008226472A1 US 20080226472 A1 US20080226472 A1 US 20080226472A1 US 58930305 A US58930305 A US 58930305A US 2008226472 A1 US2008226472 A1 US 2008226472A1
Authority
US
United States
Prior art keywords
impeller
motor
case body
air
suction mouth
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US10/589,303
Other languages
English (en)
Inventor
Takashi Kanai
Hiroki Matsushita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nidec Copal Electronics Corp
Original Assignee
Nidec Copal Electronics Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nidec Copal Electronics Corp filed Critical Nidec Copal Electronics Corp
Assigned to NIDEC COPAL ELECTRONICS CORPORATION reassignment NIDEC COPAL ELECTRONICS CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KANAI, TAKASHI, MATSUSHITA, HIROKI
Publication of US20080226472A1 publication Critical patent/US20080226472A1/en
Abandoned legal-status Critical Current

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Classifications

    • 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
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/056—Bearings
    • F04D29/057—Bearings hydrostatic; hydrodynamic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/16—Centrifugal pumps for displacing without appreciable compression
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • F04D25/0613—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump the electric motor being of the inside-out type, i.e. the rotor is arranged radially outside a central stator
    • F04D25/062—Details of the bearings
    • 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
    • F04D29/06—Lubrication
    • F04D29/063—Lubrication 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

Definitions

  • the present invention relates generally to an air blower including a sirocco-fan, turbo blower and the like.
  • the conventional air blower supports rotatably the shaft of the impeller via the ball bearing, sleeve bearing, bearing, oil retaining bearing.
  • the air blower includes a case body having an air suction mouth formed at least one side surface thereof and an outlet formed at a peripheral wall thereof, a motor which is installed into the case body, having a fluid dynamic bearing; and an impeller which is fixed to a rotation member of the motor in order to locate at an outer circumferential part of the motor, suctioning air from the air suction mouth by rotating and discharging from the outlet.
  • FIG. 1 is a plan view showing a first embodiment of the present invention
  • FIG. 2 is a front view showing a first embodiment of the present invention
  • FIG. 3 is a bottom view showing a first embodiment of the present invention
  • FIG. 4 is a plan view showing the way in which a covering case is removed
  • FIG. 5 is a cross sectional view taken along a line 5 - 5 in FIG. 1 ;
  • FIG. 6 is a cross sectional view of a motor showing a first embodiment of the present invention.
  • FIG. 7 is an explanation of an impeller showing a first embodiment of the present invention.
  • FIG. 8 is a plan view showing a second embodiment of the present invention.
  • FIG. 9 is a bottom view showing a second embodiment of the present invention.
  • FIG. 10 is a cross sectional view taken along a line 10 - 10 in FIG. 8 ;
  • FIG. 11 is a plan view showing a third embodiment of the present invention.
  • FIG. 12 is a bottom view showing a third embodiment of the present invention.
  • FIG. 13 is a cross sectional view taken along a line 13 - 13 in FIG. 11 ;
  • FIG. 14 is a plan view showing a fourth embodiment of the present invention.
  • FIG. 15 is a bottom view showing a fourth embodiment of the present invention.
  • FIG. 16 is a cross sectional view of a motor showing a fourth embodiment of the present invention.
  • FIG. 17 is a perspective view showing a fifth embodiment of the present invention.
  • FIG. 18 is an exploded perspective view showing a fifth embodiment of the present invention.
  • FIG. 19 is a cross sectional view taken along a line 19 - 19 in FIG. 17 ;
  • FIG. 20 is a cross sectional view taken along a line 20 - 20 in FIG. 17 .
  • FIGS. 1 to 7 An understanding of the present invention may be best gained by reference FIGS. 1 to 7 .
  • the reference numeral 1 is an air blower of the present invention which is comprised of a case body 6 having an air suction mouth 3 formed at one side surface 2 thereof and an outlet 5 formed at a peripheral wall 4 thereof; a motor 7 which is installed into the case body 6 , having a fluid dynamic bearing which is driven at a high speed; and an impeller which is fixed to a rotation member of the motor so as to locate at an outer circumferential part of the motor 7 , suctioning air from the air suction mouth 3 by rotating and discharging from the outlet 5 .
  • the case body 6 has attachment parts 11 , 11 having an insertion hole 10 , which is screwed by a screw 9 , formed at the outer circumferential part of the case body 6 and is comprised of a case member 12 which is formed a part of the outlet 5 ; and a covering case 15 which is formed some portions of the air suction mouth 3 and outlet 5 , having engaged holes 14 , 14 and 14 which is capable of attaching detachably to a plurality of engaging pieces 13 , 13 and 13 of the case member 12 .
  • the motor 7 is further comprised of a base plate 17 which is fixed to an inner bottom surface of the case member 12 of the case body 6 , being provided a motor drive circuit (not shown); a shaft 18 which is fixed so as to project upward from the base plate 17 ; a sleeve 20 which is arranged at an outer circumferential part of the shaft 18 via a minute space 19 ; a rotor 21 which is provided at an outer circumferential part of the sleeve 20 , arranging permanent magnets; a coreless waveform continuation coil 22 which is attached to the base plate 17 so as to positioned around an outer circumferential pail of the rotor 21 ; a back yoke 23 which is provided so as to position around an outer circumferential part of the coil 22 ; a thrust magnet 26 , which is formed in the shape of a ring, fixed to a concave part 25 which is formed at the upper part of the hub 24 which covers the shaft 18 , supporting the sleeve 20 , rotor 21 and back
  • the impeller 8 is further comprised of an impeller body 28 , which is formed in the shape of a disc, fixing with engagement to the outer circumferential part of the hub 24 as the rotation member of the motor 7 ; a plurality of blades 29 , 29 which are formed integrally at the outer circumferential part of the impeller body 28 at a constant intervals so as to project outwardly; and a plurality of holes 30 , as means for protecting contact, forming a part except for the part which is formed the blades 29 , 29 of the impeller body 28 at a constant intervals, blocking the excessive movement of the impeller 8 to a thrust direction in a condition that the pressure in the both sides of the impeller body 28 .
  • the impeller 8 rotates at a high speed after the motor 7 is driven. Then, air is sucked from the air suction mouth 3 of the case body 6 and is discharged from the outlet 5 . Therefore, it can blow in under high pressure at large air volume even though it has small size.
  • the motor 7 has the rotor 21 which is arranged the permanent magnet with revolving structure around the outer circumferential part of the sleeve 20 which is positioned surrounding the outer circumferential part of the shaft 18 via minute space 19 and the coreless waveform continuation coil 22 , there is absolutely no harmful power which is added to the shaft 18 and sleeve 20 from the magnetic circuit generating the revolving force.
  • the pressure in the both sides of the impeller body 28 is identical with approximately by the holes 30 as means for protecting contact, and it can block to move the impeller 8 to a thrust direction excessively.
  • the motor 7 with the fluid dynamic bearing is used in the present invention so that it can blow in under high pressure at large air volume even though it has small size and is economical and long-lived.
  • it can control to move an impeller to a thrust direction extremely with blowing and protect an impeller to hit a case body.
  • FIGS. 8 to 20 Other embodiments of the present invention will now be described referring to FIGS. 8 to 20 .
  • like components are denoted by like numerals as of the first embodiment and will not be further explained in great detail.
  • FIGS. 8 to 10 A second embodiment of the present invention is shown in FIGS. 8 to 10 and is distinguished from the first embodiment by the fact that the case body is replaced from another case body 6 A having an air suction grooves 31 , 31 , which is formed in the shape of an arc, which is formed at the case member 12 ; and the motor 7 is replaced from another motor 7 A having the back yoke 23 which is fixed to the base plate 17 .
  • An air blower 1 A in this way according to the third embodiment has similar advantages to that according to the first embodiment.
  • a third embodiment of the present invention is shown in FIGS. 11 to 13 and is distinguished from the first embodiment by the fact that the impeller is replaced from a sirocco-fan 32 which is formed a flange 33 at a lower part thereof, the blades forming at the flange 33 ; and the holes 30 , as means for protecting contact, are formed at the flange 33 of the sirocco-fan 32 .
  • An air blower 1 B with sirocco-fan 32 according to the third embodiment has similar advantages to that according to the first embodiment.
  • it may be installed means for protecting contact, being arranged magnet with the same magnetic pole which bias an upper end part of the sirocco-fin 32 and inner wall surface of the case body 6 A facing to the upper end part thereof.
  • FIGS. 14 to 16 A fourth embodiment of the present invention is shown in FIGS. 14 to 16 and is distinguished from the first embodiment by the fact that the shaft 18 is replaced from another shaft 18 A having dynamical-pressure grooves 34 , 35 of right and left leads having 3 micron in groove depth, 30 degrees in lead angle, 0.5 mm in groove width, 1 mm in pitch; the impeller 8 is replaced from another impeller 8 A which does not have holes; a magnet 46 is fixed to the upper part of the outer circumferential part of the hub 24 ; and means 30 A for protecting contact has a magnet 47 , biasing the magnet 46 , which is fixed to the inner wall surface, corresponding to the magnet 46 , of the covering case 15 of the case body 6 .
  • An air blower 1 C according to the fourth embodiment has similar advantages to that according to the first embodiment.
  • the protecting means 30 A may be blocked the contact based on the generated thrust dynamical pressure by rotating the hub 24 in a case that the spiral groove is formed at the upper part of the outer circumferential part of the hub 24 .
  • biasing magnets 46 , 47 are attached to the upper surface of the center part of the shaft 18 A and the center part of the concave part 25 of the upper part of the hub 24 respectively, it can control to move in the thrust direction.
  • FIGS. 17 to 20 A fifth embodiment of the present invention is shown in FIGS. 17 to 20 and is distinguished from the first embodiment by the fact that the case member 12 is replaced from another member 12 A which includes an impeller storage room 36 , the air suction mouth 3 , a first air chamber 37 which connects to the air suction mouth 3 and a second air chamber 39 which connects to the first air chamber 37 via a through hole 38 ; the case body 6 is replaced from another case body 6 B which includes a partition wall 42 having a second through hole 40 which connects to the second air chamber 39 covers an opening part 12 a of the case member 12 A and a third through hole 41 which connects to the impeller storage room 36 and a covering case 15 A, which is formed in the shape of a shallow cover, having an air channel 44 which introduces the air to the third through hole 41 after it passes the outer circumferential part of a partition plate 43 from the second through hole 40 , forming the partition plate 43 , which is formed is the shape of a question mark without dot, being located inside the covering
  • the intake silence channels 45 including the first air chamber 37 , through hole 38 , second air chamber 39 , second through hole 40 , air channel 44 and third through hole 41 , which are formed at the case body are explained in this embodiment.
  • at least one silence room may be formed.
  • the impeller 8 with the holes 30 as means of preventing the contact is explained.
  • the ring-shaped thrust magnet 26 of the motor 7 and the magnet of the thrust magnet 27 which is fixed to the upper part of the shaft 18 may block the extreme movement to the thrust direction, and the magnet may be formed, the magnet generating the sucking force to pull back with the movement to the rust direction.
  • the coreless waveform continuation coil 22 as the coil is explained in each embodiment in the present invention. Additionally, the coils other than the coreless waveform continuation coil may be used.
  • the impeller is formed of the plastic magnet, and the blocking means, controlling the rotor magnet and movement to the thrust direction is attached to the impeller, the number of the assemble member may be reduced, and the manufacturing process may be simplified and the like.
  • the air blower includes a case body having an air suction mouth formed at least one side surface thereof and an outlet formed at a peripheral wall thereof, a motor which is installed into the case body, having a fluid dynamic bearing; and an impeller which is fixed to a rotation member of the motor in order to locate at an outer circumferential part of the motor, suctioning air from the air suction mouth by rotating and discharging from the outlet so that the impeller can be rotated by the motor with the fluid dynamic bearing.
  • the noncontact fluid dynamic bearing supports rotatably the impeller without the contacted bearing including the conventional ball bearing, sleeve bearing and oil retaining bearing, it can rotate at a high speed and blow in under high pressure at large air volume even though it is small size.
  • the coreless motor as the motor as discussed above is used so that it can reduce eddy-current loss and hysteresis loss.
  • claim 2 has the same effect as the above (1) to (3), and the contact-block means can prevent the trouble that the impeller moves to the thrust direction extremely and hit the case body.
  • claim 3 has the same effect as the above (1) to (3), and it can reduce the suction sound by at least one silence room of the intake silence channel.
  • the present invention is utilized in industry for the air blower.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US10/589,303 2005-06-23 2005-06-23 Air Blower Abandoned US20080226472A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2005/011525 WO2006137141A1 (ja) 2005-06-23 2005-06-23 送風機

Publications (1)

Publication Number Publication Date
US20080226472A1 true US20080226472A1 (en) 2008-09-18

Family

ID=37570194

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/589,303 Abandoned US20080226472A1 (en) 2005-06-23 2005-06-23 Air Blower

Country Status (3)

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US (1) US20080226472A1 (ja)
JP (1) JPWO2006137141A1 (ja)
WO (1) WO2006137141A1 (ja)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100232957A1 (en) * 2009-03-13 2010-09-16 Alex Horng Blower Fan
WO2017106593A1 (en) 2015-12-17 2017-06-22 Venturedyne, Ltd. Environmental sensor and method of operating the same
US20170177009A1 (en) * 2015-12-17 2017-06-22 Venturedyne, Ltd. Environmental sensor and method of operating the same
US20170356459A1 (en) * 2016-06-08 2017-12-14 Nidec Corporation Blower apparatus
US9857285B2 (en) 2015-12-17 2018-01-02 Venturedyne, Ltd. Environmental sensor and method of operating the same
US10557472B2 (en) 2015-12-17 2020-02-11 Venturedyne, Ltd. Environmental sensor and method of operating the same
EP4008909A1 (de) 2020-12-01 2022-06-08 Micronel AG Strömungsmaschine
US20230136866A1 (en) * 2021-10-29 2023-05-04 Huaian Guorun Electric Co., Ltd. Air-flow channel structure of air pump, micro air pump, waterproof air pump, and inflatable product

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012155126A2 (en) 2011-05-12 2012-11-15 Alencon Acquisition Co., Llc High voltage energy harvesting and conversion renewable energy utility size electric power systems and visual monitoring and control systems

Citations (11)

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US2171342A (en) * 1938-04-01 1939-08-29 Gen Electric Fan casing
US3276678A (en) * 1964-12-10 1966-10-04 Imc Magnetics Corp Electrically driven fan having air bearing supported impeller
US5135363A (en) * 1982-11-09 1992-08-04 Papst-Motoren Gmbh & Co. Kg Miniaturized direct current fan
US6236129B1 (en) * 1998-09-01 2001-05-22 Matsushita Electric Industrial Co., Ltd. Motor with hydrodynamic bearing and heat sink device employing this motor
US6299406B1 (en) * 2000-03-13 2001-10-09 Ford Global Technologies, Inc. High efficiency and low noise fuel pump impeller
US6488485B1 (en) * 1998-05-15 2002-12-03 Robert Bosch Gmbh Cooling fan
US20040126040A1 (en) * 2002-12-27 2004-07-01 Wun-Chang Shih Fluid dynamic bearing module
US6765326B1 (en) * 1998-02-27 2004-07-20 Matsushita Electric Industrial Co., Ltd. Cooling device motor having a hydrodynamic bearing with a unitary shaft thrust supporter
US6849978B2 (en) * 2002-02-05 2005-02-01 Delta Electronics, Inc. Motor having a magnetic bearing
US7008180B2 (en) * 2002-06-28 2006-03-07 Seiko Epson Corporation Axial-flow fan and projector provided with the same
US7364411B2 (en) * 2003-04-14 2008-04-29 Nidec Corporation Fan impeller and fan motor

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JPH0874785A (ja) * 1994-09-08 1996-03-19 Hitachi Ltd ターボブロワ
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JP2004332724A (ja) * 2003-04-14 2004-11-25 Nippon Densan Corp ファンインペラおよびファンモータ

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2171342A (en) * 1938-04-01 1939-08-29 Gen Electric Fan casing
US3276678A (en) * 1964-12-10 1966-10-04 Imc Magnetics Corp Electrically driven fan having air bearing supported impeller
US5135363A (en) * 1982-11-09 1992-08-04 Papst-Motoren Gmbh & Co. Kg Miniaturized direct current fan
US6765326B1 (en) * 1998-02-27 2004-07-20 Matsushita Electric Industrial Co., Ltd. Cooling device motor having a hydrodynamic bearing with a unitary shaft thrust supporter
US6488485B1 (en) * 1998-05-15 2002-12-03 Robert Bosch Gmbh Cooling fan
US6236129B1 (en) * 1998-09-01 2001-05-22 Matsushita Electric Industrial Co., Ltd. Motor with hydrodynamic bearing and heat sink device employing this motor
US6299406B1 (en) * 2000-03-13 2001-10-09 Ford Global Technologies, Inc. High efficiency and low noise fuel pump impeller
US6849978B2 (en) * 2002-02-05 2005-02-01 Delta Electronics, Inc. Motor having a magnetic bearing
US7008180B2 (en) * 2002-06-28 2006-03-07 Seiko Epson Corporation Axial-flow fan and projector provided with the same
US20040126040A1 (en) * 2002-12-27 2004-07-01 Wun-Chang Shih Fluid dynamic bearing module
US7364411B2 (en) * 2003-04-14 2008-04-29 Nidec Corporation Fan impeller and fan motor

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100232957A1 (en) * 2009-03-13 2010-09-16 Alex Horng Blower Fan
US8382427B2 (en) 2009-03-13 2013-02-26 Sunonwealth Electric Machine Industry Co., Ltd. Blower fan
WO2017106593A1 (en) 2015-12-17 2017-06-22 Venturedyne, Ltd. Environmental sensor and method of operating the same
US20170177009A1 (en) * 2015-12-17 2017-06-22 Venturedyne, Ltd. Environmental sensor and method of operating the same
US9857285B2 (en) 2015-12-17 2018-01-02 Venturedyne, Ltd. Environmental sensor and method of operating the same
US9983596B2 (en) * 2015-12-17 2018-05-29 Venturedyne, Ltd. Environmental sensor and method of operating the same
EP3390838A4 (en) * 2015-12-17 2019-11-13 Venturedyne, Ltd ENVIRONMENTAL SENSOR AND METHOD FOR OPERATING SAME
US10557472B2 (en) 2015-12-17 2020-02-11 Venturedyne, Ltd. Environmental sensor and method of operating the same
US20170356459A1 (en) * 2016-06-08 2017-12-14 Nidec Corporation Blower apparatus
EP4008909A1 (de) 2020-12-01 2022-06-08 Micronel AG Strömungsmaschine
WO2022117273A1 (de) 2020-12-01 2022-06-09 Micronel Ag Strömungsmaschine
US20230136866A1 (en) * 2021-10-29 2023-05-04 Huaian Guorun Electric Co., Ltd. Air-flow channel structure of air pump, micro air pump, waterproof air pump, and inflatable product

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Publication number Publication date
JPWO2006137141A1 (ja) 2009-01-08
WO2006137141A1 (ja) 2006-12-28

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Legal Events

Date Code Title Description
AS Assignment

Owner name: NIDEC COPAL ELECTRONICS CORPORATION, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KANAI, TAKASHI;MATSUSHITA, HIROKI;REEL/FRAME:018209/0503

Effective date: 20060607

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION