WO2000073661A1 - Turbo fan - Google Patents

Turbo fan Download PDF

Info

Publication number
WO2000073661A1
WO2000073661A1 PCT/KR2000/000574 KR0000574W WO0073661A1 WO 2000073661 A1 WO2000073661 A1 WO 2000073661A1 KR 0000574 W KR0000574 W KR 0000574W WO 0073661 A1 WO0073661 A1 WO 0073661A1
Authority
WO
WIPO (PCT)
Prior art keywords
blade
turbo fan
blade plate
shroud
blades
Prior art date
Application number
PCT/KR2000/000574
Other languages
French (fr)
Inventor
Jeong Hun Kim
Byeong Il Park
Dai Sik Kim
Original Assignee
Lg Electronics Inc.
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 Lg Electronics Inc. filed Critical Lg Electronics Inc.
Priority to AU52527/00A priority Critical patent/AU5252700A/en
Publication of WO2000073661A1 publication Critical patent/WO2000073661A1/en

Links

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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis
    • 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
    • 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
    • F04D29/02—Selection of particular materials
    • F04D29/023—Selection of particular materials especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/50—Building or constructing in particular ways
    • F05D2230/53—Building or constructing in particular ways by integrally manufacturing a component, e.g. by milling from a billet or one piece construction

Definitions

  • the present invention relates to a turbo fan and in particular to a turoo fan consisting of a blade plate having a hub at central portion thereof blades and a shroud which are integrally molded in one piece to thereby improve a productivity
  • a turbo fan is a kind of centrifugal fan that presses air by using a concentric force of air generated by rotation of blades As the turbo fan is able to generate a large quantity of air flow, it is employed to an air conditioner of a large capacity
  • the conventional turbo fan includes a fan body 10 having several blades formed in a circumferential direction at a predetermined angle and its central portion combined with a rotational shaft (not shown) of a drive motor to be rotated to suck and discharge air, and a shroud 20 combined at the front end portion of each blade of the fan body 10 to prevent the blades from vibrating and to guide the air flow
  • the fan body 10 includes a blade plate 11 in a disk form, a hub 12 protrusively formed at the central portion of the blade plate 11 and blades 13 radially formed at the front marginal portion of the blade plate 11 at a predetermined angle
  • Each of the blades 13 is a zonary body having a certain width and length
  • One end portion of the blade 3 is integrally molded with the marginal portion of the front surface of the blade plate 11
  • a combining side portion 13a is formed at the front end portion of the blade 13, which has a certain slope angle so 5 that its extended line is commensurate with the inner circumferential surface of the fixing portion of the shroud 20
  • the shroud 20 has a frustotruncated shape with its head cut Its rear side is fixed with the combining side portion 13a of the blade 13 forming a large-diameter portion 21 And as the diameter becomes gradually shortened 1 so that the opposite side of the large-diameter portion 21 , that is, a small- diameter portion 22 is formed at the front side Thus, the air sucked by the blades 13 proceeds toward the front side without being diffused while passing from the large-diameter portion 21 to the small-diameter portion 22
  • the conventional turbo fan constructed as described above is _ 5 fabricated as follows
  • the fan body 10 and the shroud 20 are separately fabricated to be assembled First a cavity with a predetermined shape is formed on a metal mold for fan body A flux such as PVC is injected into the cavity to thereby integrally fabricate the blade plate 11 , the hub 12 and the blades 13 i c And then a predetermined shape of cavity is formed on a mold for a shroud into which a flux such as PVC is injected thereby fabricating a ring- shape shroud 20
  • an object of the present invention is to provide a turbo fan of which a fan body and a shroud are molded in a single metal mold, thereby reducing the number of operation processes, reducing a production cost and improving its productivity
  • a turbo fan comprising a blade plate having a hub at its central portion to be coupled with a rotational shaft of a drive motor, a plurality of blades integrally formed at the front side of the blade plate for sucking and forcibly delivering air by being rotated with the blade plate and a shroud integrally formed at the front end section of the blades for preventing the blade from vibrating and forming a passage for the air, in which an outer diameter of the blade plate is smaller than or the same as the minimum inner diameter of the small-diameter portion of the shroud
  • Figure 1 is a perspective view of disassembled turbo fan in accordance with a conventional art
  • 5 Figure 2 is a vertical-sectional view of Figure 1 in accordance with the conventional art
  • Figure 3 is a vertical-sectional view showing a combined state of the turbo fan in accordance with the conventional art
  • Figure 4 is a plan view showing a combined state of the turbo fan from ⁇ o rear viewing in accordance with the conventional art
  • FIG. 5 is a perspective view of a turbo fan in accordance with the present invention.
  • Figure 6 is a vertical-sectional view of the turbo fan in accordance with the present invention
  • Figure 7 is a plan view of the turbo fan from rear viewing in accordance with the present invention
  • Figure 8 is a schematic view for explaining a method for fabricating the turbo fan in accordance with the present invention
  • FIG 5 is a perspective view of a turbo fan in accordance with the present invention
  • Figure 6 is a vertical-sectional view of the turbo fan in accordance with the present invention
  • Figure 7 is a plan view of the turbo fan from rear viewing in accordance with the present invention
  • the turbo fan of the present invention includes a disk-type blade plate 31 , a hub 32 protrusively formed at the central portion of the blade plate 31 so as to be coupled with a rotational shaft of a drive motor a plurality of blades 33 integrally molded in the front portion of the blade plate 31 for sucking and forcibly delivering air, and a ring-type shroud 34 integrally molded at the front end section of the blades 33 for preventing a vibration of the blades 33 and guiding the air
  • the shroud 34 is in a ring shape and integrally molded at the front end portion of the blades 33
  • the rear side of the shroud 34 that is, the side contacting the blade 33, is a large-diameter portion 34a that has a larger diameter and the diameter becomes smaller as it goes toward the front side, forming a small-diameter portion 34b
  • the air sucked by the blades 33, without being diffused passes through the large-diameter portion 34a and the small-d
  • the blade plate 31 is molded so that its outer diameter is smaller than or the same as the minimum inner diameter of the shroud 34 That is as shown in Figure 6, the outer diameter difference 'L' between the shroud 34 and the blade plate 31 is larger than or the same as the inner and outer diameter difference 'H' of the shroud 34
  • the blade 33 is formed curved in a radial direction at the front marginal portion of the blade plate 31 so as to forcibly deliver the air by generating centrifugal force or centripetal force when it is rotated with the blade plate 31.
  • the sectional figure of the blade 33 is the same as that of the typical blade.
  • the air is prevented from diffusing into a space between the outer circumferential portion of the blade plate 31 and the end of the blade 33. Accordingly, the turbulent air can be restrained and a noise can be prevented
  • the turbo fan having the blade plate with the hub. the blades and the shroud is molded in a single metal mold.
  • a fusion such as PVC is injected into a lower metal mold (M1 ) having a predetermined shape of cavity, on which an upper metal mold (M2) is mounted having a predetermined shape to cover And then, after a certain time elapses, the fusion is hardened, and then the upper metal mold M2 is opened to take out a turbo fan.
  • the blade plate 31 and the shroud 34 have sides facing to each other and thus a mutual interference may happen between them when the turbo fan is taken out.
  • the blade plate 31 is removed as wide as the area occupied by the shroud 34 in the axial direction and the rear end portion of the blade 33 is integrally molded at the marginal portion of the blade plate 31 by 1/3 to 1/4 portion of the width thereof which the other portion
  • the turbo fan is fabricated with the blade plate including the hub, the blade and the shroud at one time, so that the number of working processes can be reduced. Also, since no additional metal mold is necessary, the number of the metal mold is reduced, resulting in a
  • the turbo fan according to the present invention includes a plurality of : 0 blades at the front side of the blade plate, a shroud formed at the front end section of the blade, of which the outer diameter of the blade plate is smaller than or the same as the minimum inner diameter of the shroud. Since the turbo fan is fabricated in a single metal mold, the number of assembling processes are reduced, which leads to reduction of the number of the metal molds required for fabricating the turbo fan, resulting in a reduction of a production cost

Abstract

A turbo fan includes: a blade plate having a hub to be coupled with a rotational shaft of a drive motor; a plurality of blades integrally formed at the front side of the blade plate for forcibly delivering air by being rotated with the blade plate; and a shroud integrally formed at the front end section of the blades, of which an outer diameter of the blade plate is smaller than or the same as the minimum inner diameter of the shroud. Since the turbo fan is fabricated in a single metal mold, the number of assembling processes are reduced, which leads to reduction of the number of the metal molds required for fabricating the turbo fan, resulting in a reduction of a production cost.

Description

TURBO FAN
TECHNICAL FIELD
The present invention relates to a turbo fan and in particular to a turoo fan consisting of a blade plate having a hub at central portion thereof blades and a shroud which are integrally molded in one piece to thereby improve a productivity
BACKGROUND ART Generally, a turbo fan is a kind of centrifugal fan that presses air by using a concentric force of air generated by rotation of blades As the turbo fan is able to generate a large quantity of air flow, it is employed to an air conditioner of a large capacity
As shown in Figures 1 through 4, the conventional turbo fan includes a fan body 10 having several blades formed in a circumferential direction at a predetermined angle and its central portion combined with a rotational shaft (not shown) of a drive motor to be rotated to suck and discharge air, and a shroud 20 combined at the front end portion of each blade of the fan body 10 to prevent the blades from vibrating and to guide the air flow The fan body 10 includes a blade plate 11 in a disk form, a hub 12 protrusively formed at the central portion of the blade plate 11 and blades 13 radially formed at the front marginal portion of the blade plate 11 at a predetermined angle
Each of the blades 13 is a zonary body having a certain width and length One end portion of the blade 3 is integrally molded with the marginal portion of the front surface of the blade plate 11
As shown in Figures 1 and 2, a combining side portion 13a is formed at the front end portion of the blade 13, which has a certain slope angle so 5 that its extended line is commensurate with the inner circumferential surface of the fixing portion of the shroud 20
The shroud 20 has a frustotruncated shape with its head cut Its rear side is fixed with the combining side portion 13a of the blade 13 forming a large-diameter portion 21 And as the diameter becomes gradually shortened 1 so that the opposite side of the large-diameter portion 21 , that is, a small- diameter portion 22 is formed at the front side Thus, the air sucked by the blades 13 proceeds toward the front side without being diffused while passing from the large-diameter portion 21 to the small-diameter portion 22
The conventional turbo fan constructed as described above is _ 5 fabricated as follows
The fan body 10 and the shroud 20 are separately fabricated to be assembled First a cavity with a predetermined shape is formed on a metal mold for fan body A flux such as PVC is injected into the cavity to thereby integrally fabricate the blade plate 11 , the hub 12 and the blades 13 i c And then a predetermined shape of cavity is formed on a mold for a shroud into which a flux such as PVC is injected thereby fabricating a ring- shape shroud 20
In this manner the combining side portion 13a formed at the front end portion of the blade 13 that is integrally molded in a circumferential direction at the forward marginal portion of the fan body 10 is combined with the inner circumferential surface of the large-diameter portion 21 of the shroud 20 and attached by thermofusion to fabricate a turbo fan
However as to the conventional method for making a turbo fan in which the fan body 10 and the shroud 20 are separately fabricated by using each mold and then assembled, since they are assembled by a postprocessing such as the thermofusion, the number of operation processes is increased Also since the fan body 10 and the shroud 20 should be molded in different molds to each other, the molds are separately manufactured causing an increase in a production cost
TECHNICAL GIST OF THE PRESENT INVENTION
Accordingly, an object of the present invention is to provide a turbo fan of which a fan body and a shroud are molded in a single metal mold, thereby reducing the number of operation processes, reducing a production cost and improving its productivity
In order to achieve the above objects, there is provided a turbo fan comprising a blade plate having a hub at its central portion to be coupled with a rotational shaft of a drive motor, a plurality of blades integrally formed at the front side of the blade plate for sucking and forcibly delivering air by being rotated with the blade plate and a shroud integrally formed at the front end section of the blades for preventing the blade from vibrating and forming a passage for the air, in which an outer diameter of the blade plate is smaller than or the same as the minimum inner diameter of the small-diameter portion of the shroud
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a perspective view of disassembled turbo fan in accordance with a conventional art, 5 Figure 2 is a vertical-sectional view of Figure 1 in accordance with the conventional art,
Figure 3 is a vertical-sectional view showing a combined state of the turbo fan in accordance with the conventional art,
Figure 4 is a plan view showing a combined state of the turbo fan from ι o rear viewing in accordance with the conventional art,
Figure 5 is a perspective view of a turbo fan in accordance with the present invention,
Figure 6 is a vertical-sectional view of the turbo fan in accordance with the present invention, 15 Figure 7 is a plan view of the turbo fan from rear viewing in accordance with the present invention, and
Figure 8 is a schematic view for explaining a method for fabricating the turbo fan in accordance with the present invention
20 DETAILED DESCRIPTION OF THE INVENTION
The turbo fan in accordance with the present invention will now be described with reference to the accompanying drawings
Figure 5 is a perspective view of a turbo fan in accordance with the present invention Figure 6 is a vertical-sectional view of the turbo fan in accordance with the present invention and Figure 7 is a plan view of the turbo fan from rear viewing in accordance with the present invention
As shown in the drawings, the turbo fan of the present invention includes a disk-type blade plate 31 , a hub 32 protrusively formed at the central portion of the blade plate 31 so as to be coupled with a rotational shaft of a drive motor a plurality of blades 33 integrally molded in the front portion of the blade plate 31 for sucking and forcibly delivering air, and a ring-type shroud 34 integrally molded at the front end section of the blades 33 for preventing a vibration of the blades 33 and guiding the air The shroud 34 is in a ring shape and integrally molded at the front end portion of the blades 33 The rear side of the shroud 34, that is, the side contacting the blade 33, is a large-diameter portion 34a that has a larger diameter and the diameter becomes smaller as it goes toward the front side, forming a small-diameter portion 34b The air sucked by the blades 33, without being diffused passes through the large-diameter portion 34a and the small-diameter portion 34b to proceed toward the front side
The blade plate 31 is molded so that its outer diameter is smaller than or the same as the minimum inner diameter of the shroud 34 That is as shown in Figure 6, the outer diameter difference 'L' between the shroud 34 and the blade plate 31 is larger than or the same as the inner and outer diameter difference 'H' of the shroud 34
Accordingly, as shown in Figures 4 and 5, as to the rear end portion of the blades 33, about 1/3 to 1/4 of the whole the blade 33 is integrally molded at the marginal portion of the blade plate 31 , and the other portion is exposed.
The blade 33 is formed curved in a radial direction at the front marginal portion of the blade plate 31 so as to forcibly deliver the air by generating centrifugal force or centripetal force when it is rotated with the blade plate 31. The sectional figure of the blade 33 is the same as that of the typical blade.
In this respect, in case that the upper and lower line of the blade 33 are curved and the section of the blade 33 has a crescent moon shape that the distance of the upper and lower line becomes greater as it goes from the both ends toward the center, the air is prevented from diffusing into a space between the outer circumferential portion of the blade plate 31 and the end of the blade 33. Accordingly, the turbulent air can be restrained and a noise can be prevented
The process of fabricating a turbo fan of the present invention will now be described
In the present invention, the turbo fan having the blade plate with the hub. the blades and the shroud is molded in a single metal mold.
With reference to Figure 8. a fusion such as PVC is injected into a lower metal mold (M1 ) having a predetermined shape of cavity, on which an upper metal mold (M2) is mounted having a predetermined shape to cover And then, after a certain time elapses, the fusion is hardened, and then the upper metal mold M2 is opened to take out a turbo fan.
At this time, as the blade plate 31 and the shroud 34 have sides facing to each other and thus a mutual interference may happen between them when the turbo fan is taken out. However, the blade plate 31 is removed as wide as the area occupied by the shroud 34 in the axial direction and the rear end portion of the blade 33 is integrally molded at the marginal portion of the blade plate 31 by 1/3 to 1/4 portion of the width thereof which the other portion
5 thereof is exposed outwardly of the marginal portion of the blade plate 31. so as for the blade plate 31 and the shroud 34 not to be overlapped in the axial direction. In this manner, the product can be easily taken out
As so far described, according to the turbo fan of the present invention, such a post-process as in the conventional art in which the blade plate and
.0 the blade are molded and then the shroud is separately molded and attached to the blade is omitted. Instead, the turbo fan is fabricated with the blade plate including the hub, the blade and the shroud at one time, so that the number of working processes can be reduced. Also, since no additional metal mold is necessary, the number of the metal mold is reduced, resulting in a
.5 reduction of a production cost.
INDUSTRIAL APPLICABILITY
The turbo fan according to the present invention includes a plurality of : 0 blades at the front side of the blade plate, a shroud formed at the front end section of the blade, of which the outer diameter of the blade plate is smaller than or the same as the minimum inner diameter of the shroud. Since the turbo fan is fabricated in a single metal mold, the number of assembling processes are reduced, which leads to reduction of the number of the metal molds required for fabricating the turbo fan, resulting in a reduction of a production cost

Claims

1 A turbo fan comprising a blade plate having a hub to be coupled with a rotational shaft of a drive motor, a plurality of blades integrally formed at the front side of the blade plate for forcibly delivering air by being rotated with the blade plate, and a shroud integrally formed at the front end section of the blades wherein an outer diameter of the blade plate is smaller than or the same as the minimum inner diameter of the shroud
2 The turbo fan according to claim 1 , wherein the front end section of the blade contacting the shroud is formed so that the blade is more protrusive from the end of the inner diameter of the shroud toward the center of the turbo fan
3 The turbo fan according to claim 1 , wherein the section of the blade has a crescent shape that its upper and lower lines are curved and the distance of the upper and the lower lines becomes gradually wide as it goes from both ends to the center
4 The turbo fan according to claim 1 , wherein the blade plate has a flat form
5 A turbo fan comprising a blade plate having a hub to be coupled with a rotational shaft of a drive motor a plurality of blades integrally formed at the front side of the blade plate for sucking and forcibly delivering air by being rotated with the blade plate, and a shroud integrally formed at the front end section of the blades for preventing the blade from vibrating and forming a passage for the air wherein a portion of the shroud as large as it occupies the blade plate in the axial direction is removed from the hub portion
6 The turbo fan according to claim 5, wherein the front end section of the blade contacting the shroud is formed so that the blade is more protrusive from the end of the inner diameter of the shroud toward the center of the turbo fan
7 The turbo fan according to claim 5, wherein the section of the blade has such a crescent shape that its upper and lower lines are curved and the distance of the upper and the lower lines becomes gradually wide as it goes from both ends to the center
8 The turbo fan according to claim 5, wherein the blade plate has a flat form
9 A turbo fan comprising a blade plate having a hub to be coupled with a rotational shaft of a drive motor, a plurality of blades integrally formed at the front side of the blade plate for sucking and forcibly delivering air by being rotated with the blade plate, and a shroud integrally formed at the front end section of the blades for preventing the blade from vibrating and forming a passage for the air, wherein each blade is more protrusive from the outer diameter end of the blade plate to the radial direction
PCT/KR2000/000574 1999-06-01 2000-06-01 Turbo fan WO2000073661A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU52527/00A AU5252700A (en) 1999-06-01 2000-06-01 Turbo fan

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1999/20044 1999-06-01
KR1019990020044A KR20010001065A (en) 1999-06-01 1999-06-01 Turbofan

Publications (1)

Publication Number Publication Date
WO2000073661A1 true WO2000073661A1 (en) 2000-12-07

Family

ID=19589184

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2000/000574 WO2000073661A1 (en) 1999-06-01 2000-06-01 Turbo fan

Country Status (3)

Country Link
KR (1) KR20010001065A (en)
AU (1) AU5252700A (en)
WO (1) WO2000073661A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100414117C (en) * 2003-08-25 2008-08-27 乐金电子(天津)电器有限公司 Turbofan for air conditioner
CN103185027A (en) * 2005-10-28 2013-07-03 雷斯梅德电动科技有限公司 Single or multiple stage blower and nested volute(s) and/or impeller(s) therefor
CN103321954A (en) * 2012-03-21 2013-09-25 奇鋐科技股份有限公司 Fan blade structure and manufacturing method thereof

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100432431B1 (en) * 2001-11-13 2004-05-22 엘지이노텍 주식회사 Both directions indraft type centrigugal fan and cooling apparatus for computer using the centrigugal fan
KR100460587B1 (en) * 2002-04-19 2004-12-09 삼성전자주식회사 Turbofan and mold for manufacturing the same
KR100725813B1 (en) * 2006-04-04 2007-06-08 삼성전자주식회사 Centrifugal fan

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60261997A (en) * 1984-06-08 1985-12-25 Hitachi Ltd Integratedly molded fan configuration
JPH0295797A (en) * 1988-09-30 1990-04-06 Matsushita Refrig Co Ltd Impeller for centrifugal compressor
JPH0318698A (en) * 1989-06-16 1991-01-28 Sato Kogyosho:Kk Centrifugal fan
JPH07293494A (en) * 1994-04-26 1995-11-07 Nippondenso Co Ltd Centrifugal multiblade fan and its manufacture

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3520218A1 (en) * 1984-06-08 1985-12-12 Hitachi, Ltd., Tokio/Tokyo IMPELLER FOR A RADIAL BLOWER

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60261997A (en) * 1984-06-08 1985-12-25 Hitachi Ltd Integratedly molded fan configuration
JPH0295797A (en) * 1988-09-30 1990-04-06 Matsushita Refrig Co Ltd Impeller for centrifugal compressor
JPH0318698A (en) * 1989-06-16 1991-01-28 Sato Kogyosho:Kk Centrifugal fan
JPH07293494A (en) * 1994-04-26 1995-11-07 Nippondenso Co Ltd Centrifugal multiblade fan and its manufacture

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100414117C (en) * 2003-08-25 2008-08-27 乐金电子(天津)电器有限公司 Turbofan for air conditioner
CN103185027A (en) * 2005-10-28 2013-07-03 雷斯梅德电动科技有限公司 Single or multiple stage blower and nested volute(s) and/or impeller(s) therefor
CN103185027B (en) * 2005-10-28 2017-12-05 瑞思迈发动机及马达技术股份有限公司 Single-stage or multistage blowers and the air blower nested type spiral case and/or impeller
CN103321954A (en) * 2012-03-21 2013-09-25 奇鋐科技股份有限公司 Fan blade structure and manufacturing method thereof

Also Published As

Publication number Publication date
KR20010001065A (en) 2001-01-05
AU5252700A (en) 2000-12-18

Similar Documents

Publication Publication Date Title
JP6081142B2 (en) Centrifugal fan impeller and centrifugal fan
JP6063619B2 (en) Centrifugal fan
JP3995010B2 (en) Impeller of multiblade blower and method of manufacturing the same
JP6071394B2 (en) Centrifugal fan
KR20080045564A (en) Turbofan and manufacturing method thereof
JP2003065291A (en) Turbo fan and its die for manufacture
KR20040104974A (en) Turbofan and mold for manufacturing the same
US7070389B2 (en) Turbofan and method of manufacturing the same
JP2985656B2 (en) Centrifugal multi-blade fan and its manufacturing method
JP2018017167A (en) Impeller and motor
CN103659163B (en) Method for manufacturing fan wheel
US5478206A (en) Impeller for a radial fan
JP2005120877A (en) Transverse flow blower and blade for the same
US6095752A (en) Centrifugal blower impeller, especially for a heating and ventilating, and/or air conditioning, system for a motor vehicle
WO2000073661A1 (en) Turbo fan
JP3668782B2 (en) Blower fan and manufacturing method thereof
JP2005504929A (en) Centrifugal wheel
US20070009353A1 (en) Airflow generating structure and the apparatus thereof
KR100725813B1 (en) Centrifugal fan
JP6282720B2 (en) Centrifugal fan
EP2096318B1 (en) Impeller for multi-blade fan
JP2003035293A (en) Impeller for centrifugal blower and centrifugal blower equipped therewith
JP3050461B2 (en) Impeller of vortex blower and method of manufacturing the same
EP3660318B1 (en) Double suction fan and air conditioner having the same
JP2013060874A (en) Electric air blower and electric vacuum cleaner using the same

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AL AM AT AU AZ BA BB BG BR BY CA CH CN CR CU CZ DE DK DM EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP