EP1420168B1 - Centrifugal blower - Google Patents

Centrifugal blower Download PDF

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Publication number
EP1420168B1
EP1420168B1 EP20030257081 EP03257081A EP1420168B1 EP 1420168 B1 EP1420168 B1 EP 1420168B1 EP 20030257081 EP20030257081 EP 20030257081 EP 03257081 A EP03257081 A EP 03257081A EP 1420168 B1 EP1420168 B1 EP 1420168B1
Authority
EP
European Patent Office
Prior art keywords
casing
centrifugal blower
bellmouth
air
air intake
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.)
Expired - Fee Related
Application number
EP20030257081
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1420168A1 (en
Inventor
Yukio Nabeta
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.)
Sanden Corp
Original Assignee
Sanden Corp
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Filing date
Publication date
Application filed by Sanden Corp filed Critical Sanden Corp
Publication of EP1420168A1 publication Critical patent/EP1420168A1/en
Application granted granted Critical
Publication of EP1420168B1 publication Critical patent/EP1420168B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F04D25/00—Pumping installations or systems
    • F04D25/16—Combinations of two or more pumps ; Producing two or more separate gas flows
    • F04D25/166—Combinations of two or more pumps ; Producing two or more separate gas flows using fans
    • 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

Definitions

  • the present invention relates to a centrifugal blower, and, more specifically, to a centrifugal blower suitable particularly for an air conditioning system for vehicles, in which a bellmouth is provided to an air intake port of a casing.
  • a conventional centrifugal blower used in an air conditioning system for vehicles is constructed, for example, as shown in Figs. 7 and 8 (for example, JP-A-8-109897).
  • a centrifugal blower 100 has a motor 101, and multiblade fans 104 and 105 are provided on the ends of rotary shafts 102 and 103 connected to the motor 101.
  • Fans 104 and 105 are contained in casings 106 and 107, respectively.
  • Air intake ports 108 and 109 are provided on both sides of casing 106, and air intake ports 111 and 112 are provided on both sides of casing 107.
  • Air sucked through air intake ports 108 and 109 is discharged from the radial inside of fan 104 to the radial outside of the fan 104, and sent to a heater unit (not shown) of an air conditioning system through a flow path 110 formed in casing 106.
  • air sucked through air intake ports 111 and 112 is discharged from the radial inside of fan 105 to the radial outside of the fan 105, and sent to the heater unit of the air conditioning system through a flow path 113 formed in casing 107.
  • Each of casings 106 and 107 are formed from two casing forming members 114 and 115 capable of being divided into each other in the arrow directions (in the radial direction of the multiblade fan) shown in Fig. 8.
  • centrifugal blower In a centrifugal blower, generally it is considered that, if a bellmouth is provided to each air intake port, because residence or back flow of air near the air intake port is prevented and the air flow may be stabilized, reduction of blast performance and generation of noise at the time of air suction may be prevented.
  • a bellmouth is provided to each of casings 106 and 107 integrally with the casing, the structure of a mold for molding the casing may become complicated. Therefore, at least in a double-axis type centrifugal blower as described above, a centrifugal blower having a bellmouth on each air intake port integrally with the air intake port has not been known as long as the inventor of the present invention has investigated.
  • US-A-2002-0021963 discloses a blowing fan assembly for a window-type air conditioner.
  • US-A-62006633 discloses a case assembly for a blower unit.
  • US-A-1875881 discloses a fan housing with bellmouth construction.
  • centrifugal blower which can easily provide a bellmouth to each air intake port without use of a complicated mold for molding a casing forming member and without increase of number of parts, thereby effectively preventing reduction of the blast performance of the blower and generation of noise from the blower.
  • a centrifugal blower comprising multiblade fans having a plurality of blades one fan disposed around each end of a rotary shaft in the circumferential direction thereof to form a double-axis type fan and a casing for each multiblade fan and containing said multiblade fan, the blower arranged such that air drawn through air intake ports on said casings is drawn through a portion between adjacent blades, and characterized by a bellmouth on each casing, each bellmouth having a diameter increasing toward an outside of its respective casing from its respective air intake port, wherein each said casing is formed from a plurality of casing-forming members capable of being divided into each other in the radial direction of their respective fan.
  • the casing may be made of a resin.
  • the bellmouth may be formed integrally with the casing.
  • the number of parts is reduced as compared with a case where the bellmouth is formed separately from the casing.
  • the casing is molded (for example, injection molding), it becomes possible to mold the casing and the bellmouth simultaneously. Therefore, the cost for manufacturing the casing, ultimately, the whole of the blower, may be reduced.
  • each casing forming member having a bellmouth forming portion with a complicated shape may be easily molded with a simple mold which does not have a complicated structure such as a slide structure. Therefore, the cost of the mold may be reduced. Further, by making the structure of the mold simple without using a slide structure and the like, the durability and the reliability of the mold may be increased, and the quality of the casing forming members may be improved.
  • the bellmouth having a diameter increasing toward the outside of the casing is provided to the air intake port opened on the casing, residence and back flow of air near the air intake port may be prevented, and the air flow may be stabilized. Therefore, decrease of the blast performance ascribed to reduction of the amount of sucked air and generation of noise at the time of air suction may be effectively prevented. Since this bellmouth extends toward the outside of the casing, when the casing forming member is molded, the bellmouth portion may be easily molded integrally with the casing forming member by a simple mold without a complicated slide structure and the like. Further, increase of the number parts may be prevented by forming the bellmouth portion integrally with the casing forming member. Especially, the bellmouth may be easily formed by forming the casing from a plurality of casing forming members capable of being divided into each other in the radial direction of the multiblade fan.
  • a desirable bellmouth may be formed on each air intake port easily and inexpensively without using a complicated mold structure.
  • a centrifugal blower having a desirable property may be manufactured easily and inexpensively.
  • Figs. 1 to 4 show a centrifugal blower according to an embodiment of the present invention.
  • a centrifugal blower 1 is constructed as a blower used in an air conditioning system for vehicles.
  • Centrifugal blower 1 has a motor 2, and it is constructed as a double-axis type centrifugal blower.
  • Multiblade fans 6 and 7 each having a plurality of blades 5 are provided at the ends of rotary shafts 3 and 4 of motor 2. The plurality of blades 5 are disposed around each of rotary shafts 3 and 4 in the circumferential direction, as shown in Fig. 4.
  • Each of rotary shafts 3 and 4 are connected to the plurality of blades 5 via a drive plate 8 formed as a disc-like plate, and the drive plates 8 and blades 5 are rotated accompanying with the rotation of rotary shafts 3 and 4 in a predetermined direction as shown by the arrow in Fig. 4.
  • a connection ring 9 is provided on blades 5 of each of multiblade fans 6 and 7 for connecting the blades 5 to each other and reinforcing and maintaining the connection formation.
  • Multiblade fans 6 and 7 are contained in scroll-type casings 10 and 11, respectively.
  • Air intake ports 12 and 13 are opened on casing 10, and air sucked through air intake ports 12 and 13 is discharged from the radial inside of multiblade fan 6 to the radial outside of the multiblade fan 6.
  • the discharged air is sent to a heater unit (not shown) of an air conditioning system through a flow path 14.
  • air intake ports 15 and 16 are opened on casing 11, and air sucked through air intake ports 15 and 16 is discharged from the radial inside of multiblade fan 7 to the radial outside of the multiblade fan 7.
  • the discharged air is sent to the heater unit of the air conditioning system through a flow path 17.
  • Bellmouths 18, 19, 20 and 21 are provided to respective air intake ports 12, 13, 15 and 16. Each of bellmouths 18, 19, 20 and 21 extends from each of air intake ports 12, 13, 15 and 16 toward the outside of casing 10 or 11, and the diameter of each bellmouth increases toward the outside of the casing. Further, each of bellmouths 18, 19, 20 and 21 is formed integrally with casing 10 or 11. Each casing with each bellmouth is formed from, for example, a resin.
  • each of casings 10 and 11 is formed from two casing forming members 22 and 23 capable of being divided into each other in the radial direction of multiblade fan 6 or 7.
  • a semi-circular bellmouth forming portion 24 or 25 is provided on each casing forming member 22 or 23 .
  • Divided casing forming members 22 and 23 forms casing 10 or 11 by being connected to each other, and each bellmouth having a circular shape is formed by connection of bellmouth forming portions 24 and 25 at the time of the formation of casing 10 or 11.
  • casing forming members 22 and 23 are formed so as to be divided in the arrow directions shown in Fig. 2. Therefore, by designing the parting lines of molds for molding casing forming members 22 and 23 so as to meet with the division lines shown in Fig. 2, bellmouth forming portions 24 and 25 may be easily molded integrally with casing forming members 22 and 23 without using a complicated structure such as a slide mechanism and the like.
  • a usage range for an air conditioning system which exists between the resistance curve at the time of minimum load and the resistance curve at the time of maximum load, is enlarged as compared with that in the conventional centrifugal blower 100, and the advantage for improving the blast performance is exhibited.
  • the above-described centrifugal blower 1 having the respective bellmouths exhibits an excellent performance.
  • bellmouths 18 and 19 are formed integrally with casing 10 and bellmouths 20 and 21 are formed integrally with casing 11, the number of parts does not increase, and the cost up due to increase of the number of parts may be prevented.
  • casing forming members 22 and 23 and bellmouth forming portions 24 and 25 extending toward the outside of the casing forming members can be simultaneously molded by using a simple mold without employing a complicated structure such as a slide mechanism, the cost for the molding and the cost for manufacturing the mold may be greatly reduced.
  • centrifugal blower 1 is explained as to a double-axis type centrifugal blower, the present invention may be applied to a single-axis type centrifugal blower.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP20030257081 2002-11-18 2003-11-10 Centrifugal blower Expired - Fee Related EP1420168B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2002333953A JP2004169579A (ja) 2002-11-18 2002-11-18 遠心式送風機
JP2002333953 2002-11-18

Publications (2)

Publication Number Publication Date
EP1420168A1 EP1420168A1 (en) 2004-05-19
EP1420168B1 true EP1420168B1 (en) 2006-07-12

Family

ID=32171441

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030257081 Expired - Fee Related EP1420168B1 (en) 2002-11-18 2003-11-10 Centrifugal blower

Country Status (4)

Country Link
EP (1) EP1420168B1 (ja)
JP (1) JP2004169579A (ja)
CN (1) CN1500995A (ja)
DE (1) DE60306733T2 (ja)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4722555B2 (ja) 2004-07-09 2011-07-13 サンデン株式会社 遠心式送風機
JP4747542B2 (ja) * 2004-09-28 2011-08-17 ダイキン工業株式会社 送風装置及び空気調和装置
JP4660634B2 (ja) * 2008-07-10 2011-03-30 三菱電機株式会社 シロッコファン及びそれを用いた空気調和装置
CN103307039B (zh) * 2013-06-19 2015-08-26 上海酷风汽车部件有限公司 一种双轴风机装配风轮的装置
CN104696244A (zh) * 2015-03-09 2015-06-10 黎雅伟 滤尘风机
CN106640715A (zh) * 2016-10-20 2017-05-10 上海朗兹环保科技有限公司 一种风系统装置及空气净化器

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1875881A (en) * 1931-01-27 1932-09-06 American Blower Corp Fan housing construction
US3846040A (en) * 1972-06-16 1974-11-05 D Dennis Blower housing
SE9603762L (sv) * 1996-10-15 1998-04-16 Pm Luft Fläkthus för matning av luft till ett ventitlationssystem
JP2000016049A (ja) * 1998-07-08 2000-01-18 Denso Corp 送風ユニット
JP4185654B2 (ja) * 2000-08-04 2008-11-26 カルソニックカンセイ株式会社 遠心式の多翼送風機
KR100379020B1 (ko) * 2000-08-17 2003-04-08 대한민국 땅콩뿌리혹선충 방제용 천적세균 파스테리아 페네트랜스98-35 세균 및 이의 분리법

Also Published As

Publication number Publication date
JP2004169579A (ja) 2004-06-17
EP1420168A1 (en) 2004-05-19
DE60306733T2 (de) 2006-11-16
DE60306733D1 (de) 2006-08-24
CN1500995A (zh) 2004-06-02

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