CN1818394A - Centrifugal multiple-blade fan - Google Patents
Centrifugal multiple-blade fan Download PDFInfo
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- CN1818394A CN1818394A CN 200610059225 CN200610059225A CN1818394A CN 1818394 A CN1818394 A CN 1818394A CN 200610059225 CN200610059225 CN 200610059225 CN 200610059225 A CN200610059225 A CN 200610059225A CN 1818394 A CN1818394 A CN 1818394A
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Abstract
An centrifugal multiple-blade fan includes: a blade has a plurality of main blades arranged inside in the radial direction, and auxiliary blades arranged in an air flow formed between the respective adjacent main blades on the outside in the radial direction, a reinforcing rib connecting every main blades and every auxiliary blades, and a first and second surface-shaped parts connected to every main blades and every auxiliary bladesis are disposed at the two ends of blades alternately in the peripheral direction. The invention also provides an centrifugal multiple-blade fan with a improved structure having superior air blowing performance and a noise characteristic, by reducing manufacturing cost of a metal mold, while improving durability of the metal mold, by simplifying a metal mold structure.
Description
Technical field
The present invention relates to a kind of centrifugal multi-blade fan, and, more specifically, relate to the structure of improving blade part and be particularly useful for the centrifugal multi-blade fan of air-conditioning systems such as vehicle.
Background technique
Performances such as the blowability of blower, noise greatly are subjected to the influence of the shape that the shape of fan blade and structure and shell curl, and must consider these factors fully when the design blower.
In centrifugal multi-blade fan,,, and be easy to occur eddy current because of the disengaging of air-flow so be difficult to form air-flow along blade because all be arranged to shortlyer relatively along the length of each blade of airflow direction.The eddy current sound that is caused by flow shedding is the main cause of making noise in the centrifugal multi-blade fan.As the structure that is used to reduce noise, for example JP-A-60-156997 has proposed a kind of blade shape, its eddy current sound by blade section being suppressed as wing cross section cause from the air-flow of leaf abscission.
Yet, in JP-A-60-156997 in the disclosed this structure, can there be following worry: at the operating point place of low pressure loss state, may take place to be partial to the air-flow of the pressure surface of second blade of adjacency first blade from the suction surface of first blade, and can be at the downstream position generation shear flow on the blade suction surface.In order to address this is that, though can consider to be used to tighten the gap and force the method that suppresses the air-flow deflection of being adjacent to each other at its radial outer end portion place between the blade, but in this method, because the increase of the airspeed that gap constrictions causes, the pressure recovery at place, blade radial outer end may become not enough, and may reduce the characteristic of operating point place noise under supply gas performance and the inhibition high pressure loss state.
In order to address the above problem, claimant of the present invention has proposed the structure shown in Fig. 7 (JP-A-2004-60447).In Fig. 7, a plurality of primary blades 100 are along the circumferential direction arranged around the running shaft (not shown).One group of auxiliary blade 101 is provided in the radially outer position of one group of primary blades 100.Each auxiliary blade 101 is arranged in each in the air-flow that forms between the primary blades 100.
In this structure, gas flows along the pressure surface 103 of primary blades 100 with in abutting connection with the suction surface 102 of primary blades 100.At this moment, break away from towards the pressure surface 103 of adjacency primary blades 100 possibly, and can form shear flow in the downstream part of the radial outer end 104 of primary blades 100 along suction surface 102 airflow flowing.Yet, if set above-mentioned auxiliary blade 101, because having passed the air of primary blades 100 can flow along the pressure surface 105 and the suction surface 106 of auxiliary blade 101, so just suppressed that air-flow breaks away from or at the shear flow of the downstream position of primary blades 100 between primary blades 100, and can improve supply gas performance and noise control characteristic.
Yet, in said structure, the intensity of blade 100,101 is especially in the situation of the strength deficiency of auxiliary blade 101 therein, it can be owing to the rotation of fan is out of shape, and the front edge 107 (inner radial) along airflow direction of auxiliary blade 101 may be out of shape shown in the dotted line among Fig. 7 like that and it may contact with the radial outer end 104 of primary blades 100.
In order to address the above problem, claimant of the present invention proposes (the Japanese patent application No.2003-399177 (JP-A-2005-155580: Japanese Patent Laid Open Publication)) of the structure shown in Fig. 8, although this application is in the application's priority date, during just based on applying date of basic Japanese patent application No.2005-27643, still unexposed.In Fig. 8, because the front edge 107 (inner radial) of primary blades 100 along the hinder marginal part 104 (radially outer) of airflow direction and auxiliary blade 101 along airflow direction is connected to each other by strengthening rib 108, so can prevent the distortion of the front edge 107 of auxiliary blade 101.Therefore, just can guarantee the function of auxiliary blade 101 expectations, and can improve the performance of supplying gas, minimizing noise.
Yet, the centrifugal multi-blade fan that has this strengthening rib 108 therein is by resin etc. when integrally molded, because there is strengthening rib 108 in the fan that is molded and can not from mould, discharges, therefore need provide sliding function to mould, it is complicated that the structure of mould just becomes, the serviceability of mould will reduce, and can reduce the productive rate of centrifugal multi-blade fan.In addition, can increase the cost and the final cost of making centrifugal multi-blade fan that increases of mfg. moulding die.
Summary of the invention
Therefore, the purpose of this invention is to provide and have the centrifugal multi-blade fan that improves structure, it can be simplified the structure of mould and reduce the cost of mould, thereby makes centrifugal multi-blade fan with low-cost high-efficiency ground, and it has good supply gas performance and noise suppression feature.
In order to realize above-mentioned and other purpose, centrifugal multi-blade fan according to first aspect present invention comprises multi blade fan portion, above-mentioned multi blade fan portion has a plurality of blades of along the circumferential direction arranging around running shaft, an end along the axial a plurality of blades of rotation is connected on the drive plate that connects on the running shaft, another end along the axial a plurality of blades of rotation is connected to each other by connecting ring, and multi blade fan is from the radial inner end suction air of the part between the blade that is adjacent to each other, and the rotation by multi blade fan portion is from the radial outer end exhausting air of the part between the blade that is adjacent to each other.Multi blade fan is characterised in that blade comprises a plurality of primary blades that place the inner radial position and a plurality of auxiliary blades that place the radially outer position, each auxiliary blade is arranged in each in the air-flow that forms between the primary blades, each primary blades and place each auxiliary blade of the pressure surface side of described each primary blades to be connected to each other by strengthening rib, first planar surface portion is provided in an end of each blade along the direction of running shaft, first planar surface portion is along extending through the direction of each blade and being surrounded by a line, this line extends to the suction surface of each auxiliary blade of the pressure surface side that places each primary blades from the radial outer end portion of each primary blades, suction surface along each auxiliary blade extends, extend and extend to thus the radial outer end portion of each primary blades to the pressure surface of adjacency auxiliary blade from the suction surface of each auxiliary blade, second planar surface portion is provided in along another end of axial each blade of rotation, second planar surface portion is along extending through the direction of each blade and being surrounded by a line, this line extends to the pressure surface of each auxiliary blade of the suction surface side that places each primary blades from the suction surface of each primary blades, extend and extend to thus the radial outer end portion of each primary blades along the pressure surface of each auxiliary blade, and first planar surface portion and second planar surface portion are arranged alternately along the circumferencial direction of multi blade fan portion in two ends of a plurality of primary blades and auxiliary blade along the direction of running shaft.
In this centrifugal multi-blade fan, because each primary blades that is adjacent to each other is connected with second planar surface portion by first planar surface portion with the front edge (radial inner end) of each auxiliary blade along airflow direction along the hinder marginal part (radial outer end portion) of airflow direction, and planar surface portion is provided on two ends of each blade along the running shaft direction, therefore each auxiliary blade of reinforcement safely, and can prevent of the distortion of each auxiliary blade safely along the front edge (radial inner end) of airflow direction towards primary blades.Therefore, the function of auxiliary blade expectation can be guaranteed, and the supply gas performance and the noise suppression feature of centrifugal multi-blade fan can be improved.
In addition, because each primary blades and place each auxiliary blade of the pressure surface side of each primary blades to be connected to each other by strengthening rib, so can prevent the distortion of auxiliary blade more safely.
In addition, because first planar surface portion and second planar surface portion are alternately arranged along the circumferencial direction of multi blade fan portion in two ends of a plurality of primary blades and auxiliary blade along the running shaft direction, so when forming first planar surface portion and second planar surface portion, can molded first planar surface portion and second planar surface portion and do not need to provide slide mechanism etc. to mould.In addition, by alternately arranging first planar surface portion and second planar surface portion along the circumferencial direction of multi blade fan portion, just can be in the strengthening rib as the mold joint of mould along the axial end face of rotation, therefore, just can integrally moldedly have the centrifugal multi-blade fan of strengthening rib and do not need to provide slide mechanism etc. to mould.
In aforesaid first aspect, preferred first planar surface portion and connecting ring form an integral body, and second planar surface portion and integral body of drive plate formation.By therefore integrally forming first planar surface portion and second planar surface portion, because can prevent the increase of number of parts, so can suppress the increase of centrifugal multi-blade fan cost with other member.
Centrifugal multi-blade fan according to second aspect present invention comprises multi blade fan portion, above-mentioned multi blade fan portion has a plurality of blades of along the circumferential direction arranging around running shaft, an end along the axial a plurality of blades of rotation is connected on the drive plate that connects on the running shaft, another end along a plurality of blades of the direction of running shaft is connected to each other by connecting ring, multi blade fan is from the radial inner end suction air of the part between the blade that is adjacent to each other, and the rotation by multi blade fan portion is from the radial outer end exhausting air of the part between the blade that is adjacent to each other.Multi blade fan is characterised in that blade comprises a plurality of primary blades that place the inner radial position and a plurality of auxiliary blades that place the radially outer position, each auxiliary blade is arranged in each in the air-flow that forms between the primary blades, each primary blades and place each auxiliary blade of the pressure surface side of above-mentioned each primary blades to be connected to each other by strengthening rib, and otch be provided on the connecting ring with strengthening rib along the direction projection of running shaft to corresponding position, the projection plane on the connecting ring.
In this structure, because setting otch with the corresponding position, projection plane of strengthening rib on the connecting ring along the running shaft direction projection to connecting ring, be set to the mold joint of mould by end face, just may integrally pour into a mould centrifugal multi-blade fan and do not need to provide slide mechanism etc. to mould with strengthening rib along the axial strengthening rib of rotation.
In centrifugal multi-blade fan according to above-mentioned first aspect of the present invention and second aspect, thus do not limit the position of strengthening rib especially, but strengthening rib preferably is provided in along the central part office of axial primary blades of rotation and auxiliary blade.If strengthening rib is arranged in this position, just can prevent the distortion of auxiliary blade etc. more safely, for example the cooperation by strengthening rib and first planar surface portion and second planar surface portion.
In addition, preferred strengthening rib is arranged to connect the radial outer end portion of primary blades and the radial inner end of auxiliary blade.Promptly, position between the radial inner end (along the front edge of airflow direction) of the radial outer end portion (along the hinder marginal part of airflow direction) of primary blades and auxiliary blade, distance between primary blades and the auxiliary blade is minimum, therefore, if strengthening rib is arranged in this position, two kinds of blades can connect in the distance of minimum.
In addition, the radial inner end of preferred auxiliary blade is arranged in inner radial with respect to the radial outer end of primary blades.In this structure, can suppress when air passes primary blades and air-flow that the disengaging of the suction surface overdraught of primary blades occurs together towards the deflection of the pressure surface side of adjacency primary blades.
In addition, preferred auxiliary blade is arranged between the primary blades that is adjacent to each other, and the gap between the suction surface of an auxiliary blade and a primary blades is just greater than the gap between the pressure surface of auxiliary blade and another primary blades like this.In this structure, because the air-flow that will break away from from the pressure surface of primary blades is mobile along the pressure surface and the suction surface of auxiliary blade, so can suppress the disengaging and the shear flow in downstream side effectively.
Primary blades that is adjacent to each other and auxiliary blade can form an integral body.In addition, primary blades that preferably is adjacent to each other and auxiliary blade form wing cross section.In the present invention, multi blade fan portion can integrally be formed by resin.
In according to centrifugal multi-blade fan of the present invention, because can form first planar surface portion and second planar surface portion does not need to provide slide mechanism etc. to mould with the strengthening rib that can prevent the auxiliary blade distortion, so the centrifugal multi-blade fan of hope just can be provided, it has good supply gas performance and noise suppression feature, and can greatly reduce manufacture cost by simplifying mould structure.
Description of drawings
By following embodiment of the present invention and referring to accompanying drawing, be appreciated that more feature and advantage of the present invention, wherein:
Fig. 1 is the front view according to the first half of the centrifugal multi-blade fan of the first embodiment of the present invention.
Fig. 2 is the vertical sectional view of multi blade fan shown in Fig. 1.
Fig. 3 is the local enlarged side view of III-III line in Fig. 2 of the blade part of multi blade fan shown in Fig. 2.
Fig. 4 is the local enlarged side view of IV-IV line in Fig. 2 of the blade part of multi blade fan shown in Fig. 2.
Fig. 5 is the local enlarged side view of blade part of the centrifugal multi-blade fan of the second embodiment of the present invention.
Fig. 6 is the local enlarged side view of blade part when observing from another of blade part is distolateral of the multi blade fan shown in Fig. 6.
Fig. 7 is the sectional view of the blade part of traditional multi blade fan of proposing of the present patent application people.
Fig. 8 is the sectional view of claimant of the present invention blade part of the previous multi blade fan that proposes in Japanese patent application No.2003-399177.
Embodiment
Fig. 1 to 4 has shown the centrifugal multi-blade fan according to the first embodiment of the present invention.In Fig. 1, centrifugal multi-blade fan 1 has multi blade fan portion 4, and multi blade fan portion 4 has a plurality of primary blades 2 and a plurality of auxiliary blade 3.Plate-like drive plate 5 is provided in first end (at fan 1 prevent the air sucking side place) of blade 2 and 3, and drive plate 5 is connected on all blades 2 and 3.A plurality of blades 2 and 3 are along the circumferential direction arranged around running shaft 6a.Core at drive plate 5 forms axle sleeve 6.Running shaft 6a is assembled in the axle sleeve 6, and passes through the rotation of running shaft 6a, and drive plate 5 and all blades 2 and 3 all rotate along predetermined direction (along the direction shown in the arrow among Fig. 1).Ring-type connecting ring 7 is provided in second end (the air sucking side place of fan 1) of blade 2 and 3, and connecting ring 7 is connected to each other all blades 2 and 3 and plays the effect of reinforcement.
Wherein, set case (not shown) around multi blade fan portion 4 and comprise multi blade fan portion 4 and form centrifugal blower, and set suction port and relief opening to case.Case can form scroll casing shape or cylindrical.
Each primary blades 2 and each auxiliary blade 3 of being adjacent to each other are connected to each other by strengthening rib 18.In this embodiment, the radial inner end 10 of the radial outer end 9 of primary blades 2 and auxiliary blade 3 is connected to each other by strengthening rib 18.In addition, in this embodiment, as shown in Figure 2, be equipped with single strengthening rib 18 in the central part office of primary blades 2 and auxiliary blade 3 along the axial direction of multi blade fan 1.By this configuration of strengthening rib 18, can strengthen the connection between primary blades 2 and the auxiliary blade 3 effectively.
As shown in Figure 3, first planar surface portion 16 is provided in an end of each primary blades 2 and auxiliary blade 3 along the direction of running shaft 6.First planar surface portion 16 is surrounded by a line along the direction extension of passing through each blade and it, this line extends (line segment A) from the radial outer end portion 9 of primary blades 2 to the suction surface 15 of the auxiliary blade 3 of pressure surface 12 sides that place primary blades 2, suction surface 15 along auxiliary blade 3 extends (line segment B) then, and the suction surface 15 from auxiliary blade 3 extends (line segment C) and extends (line segment D) to the radial outer end portion 9 of primary blades 2 thus to the pressure surface 14 of adjacency auxiliary blade 3 thereafter.In Fig. 3,,, still applied hachure to first planar surface portion 16 in order to distinguish first planar surface portion 16 and the other parts although first planar surface portion 16 should not be shown as section.
On another end of each blade, set second planar surface portion 17, as shown in Figure 4.Second planar surface portion 17 is surrounded by a line along the direction extension of passing through each blade and it, this line extends (line segment E) from the suction surface 13 of primary blades 2 to the pressure surface 14 of the auxiliary blade 3 of suction surface 14 sides that place primary blades 2, extends (line segment F) and extends to the radial outer end portion 9 (line segment G) of primary blades 2 thus along the pressure surface 14 of auxiliary blade 3 then.In Fig. 4,,, still applied hachure equally to second planar surface portion 17 in order to distinguish second planar surface portion 17 and the other parts although second planar surface portion 17 should not be shown as section.
Along a plurality of primary blades 2 of the direction of running shaft 6a and two ends of auxiliary blade 3, first planar surface portion 16 and second planar surface portion 17 are along the circumferencial direction arranged alternate of multi blade fan portion 4.In this embodiment, first planar surface portion 16 forms an integral body with connecting ring 7, and second planar surface portion 17 forms an integral body with drive plate 5.
In the centrifugal multi-blade fan 1 according to first embodiment, when 4 rotations of multi blade fan portion, gas can flow along the pressure surface 12 and the suction surface 13 of primary blades 2.When flowing between the primary blades 2 that air is being adjacent to each other, just may be along the air-flow of the suction surface 153 of primary blades 2 from disengaging suction surface 13, and may shear flow appear at the downstream position of the radial outer end 9 of primary blades 2.Yet, auxiliary blade 3 is arranged in the air-flow that forms between the primary blades 2 that is adjacent to each other, and the air that has passed primary blades 2 is mobile along the pressure surface 14 and the suction surface 15 of auxiliary blade 3, and can suppress the appearance of the shear flow that air-flow occurs together towards the deflection of the pressure surface 12 of primary blades 2 with the disengaging of air-flow, therefore can improve the ability of supplying gas and the noise suppression feature of fan.
In addition, in centrifugal multi-blade fan 1 according to first embodiment, because the radial inner end 10 of the radial outer end portion of each primary blades 29 and each auxiliary blade 3 is connected to each other by first planar surface portion 16 and second planar surface portion 17, and first planar surface portion 16 and second planar surface portion 17 are provided in the two ends of blade along the direction of running shaft 6a, so can prevent the distortion of the radial inner end 10 of each auxiliary blade 3 towards primary blades 2 safely.In addition, because set the strengthening rib 18 of the radial inner end 10 of the radial outer end portion 9 that is used to connect each primary blades 2 that is adjacent to each other and each auxiliary blade 3, so can prevent of the distortion of the radial inner end 10 of each auxiliary blade 3 more safely towards primary blades 2, can guarantee the major function of auxiliary blade 3, therefore can more suitably improve the ability of supplying gas and the noise suppression feature of fan.
In addition, because first planar surface portion 16 and second planar surface portion 17 along running shaft 6a direction in two ends of a plurality of primary blades 2 and auxiliary blade 3 the circumferencial direction arranged alternate along multi blade fan portion 4, so can pour into a mould first planar surface portion 16 and second planar surface portion 17 and do not need to provide slide mechanism to mould.In addition, by this alternate configurations, can integrated pouredly at an easy rate have the centrifugal multi-blade fan 1 of strengthening rib 18.That is, be set to the mold joint of mould by the end face 18a along the strengthening rib 18 of running shaft 6a direction, strengthening rib 18 can integrally be poured into a mould and not need to provide slide mechanism to mould.For example,, end difference is engaged with each other and moulding strengthening rib 18, can Unitarily moldedly at an easy rate has the centrifugal multi-blade fan 1 of strengthening rib 18 by on flexible mould and fixed mould, forming the end difference that extends along the glide direction of mould.
Fig. 5 and 6 has shown the centrifugal multi-blade fan according to the second embodiment of the present invention.Basic structure according to second embodiment's centrifugal multi-blade fan is identical with first embodiment, and a plurality of blade is along the circumferential direction arranged around running shaft.Multi blade fan portion 21 have along the running shaft direction be connected on the end of a plurality of blades drive plate 19 and with another end of a plurality of blades connecting ring 20 connected to one another.Blade comprises the primary blades 22 that is arranged in the inner radial position and is arranged in auxiliary blade 23 in the air-flow that forms between the primary blades 22.The radial outer end portion 24 of each primary blades 22 and the radial inner end 25 of each auxiliary blade 23 are connected to each other by the strengthening rib 26 that is arranged in blade central part office along the running shaft direction.In this embodiment, in that the corresponding position, projection plane on 20 has set otch 27 along the running shaft direction projection to connecting ring with strengthening rib 26 on the connecting ring 20.
In this embodiment, because otch 27 is provided in the position on the projection plane of strengthening rib 26 on the connecting ring 20, so flexible mould can move through otch 27.Therefore, be set to the mold joint of mould by the end face 26a along the axial strengthening rib 26 of rotation, the centrifugal multi-blade fan with strengthening rib 26 can integrally be poured into a mould and not need to provide slide-block mechanism to mould.
Therefore, in the present invention, can obtain to have the centrifugal multi-blade fan of premium properties, and this multi blade fan is particularly useful for as the fan that is used for the blower of vehicle air conditioner.
Although invention has been described in conjunction with the preferred embodiments, it will be understood by those of skill in the art that and to make changes and improvements and do not depart from the scope of the present invention aforesaid preferred embodiment.By considering specification or realization of the present invention disclosed herein, other embodiment is also apparent to those skilled in the art.Specification and described example only are considered as exemplary, and true scope of the present invention is defined by following claim.
Claims (17)
1. centrifugal multi-blade fan, comprise multi blade fan portion, described multi blade fan portion has a plurality of blades of along the circumferential direction arranging around running shaft, an end along the axial described a plurality of blades of described rotation is connected on the drive plate that connects on the described running shaft, another end along described a plurality of blades of the described direction of described running shaft is connected to each other by connecting ring, rotation by described multi blade fan portion, described multi blade fan is from the radial inner end suction air of the part between the blade that is adjacent to each other, and radial outer end exhausting air from the described part between the blade that is adjacent to each other, it is characterized in that, described blade comprises a plurality of primary blades that place the inner radial position and a plurality of auxiliary blades that place the radially outer position, each auxiliary blade is arranged in each in the air-flow that forms between the primary blades, each primary blades and place each auxiliary blade of the pressure surface side of described each primary blades to be connected to each other by strengthening rib, first planar surface portion is provided in an end of each blade along the described direction of described running shaft, described first planar surface portion is extended and by a line encirclement along the direction of intersecting with each blade, this line extends to the suction surface of each auxiliary blade of the pressure surface side that places described each primary blades from the radial outer end portion of each primary blades, described suction surface along described each auxiliary blade extends, extend and extend to thus the described radial outer end portion of described each primary blades to the pressure surface of adjacency auxiliary blade from the described suction surface of described each auxiliary blade, second planar surface portion is provided in another end along each blade of the described direction of described running shaft, described second planar surface portion is along extending with the direction of intersecting of each blade and being surrounded by a line, this line extends to the pressure surface of each auxiliary blade of the suction surface side that places described each primary blades from the suction surface of each primary blades, extend and extend to thus the described radial outer end portion of described each primary blades along the described pressure surface of described each auxiliary blade, and described first planar surface portion and second planar surface portion are arranged alternately along the circumferencial direction of described multi blade fan portion in two ends of described a plurality of primary blades and auxiliary blade along the described direction of described running shaft.
2. centrifugal multi-blade fan as claimed in claim 1 is characterized in that, described first planar surface portion and described connecting ring form an integral body, and described second planar surface portion and described drive plate form an integral body.
3. centrifugal multi-blade fan as claimed in claim 1 is characterized in that, described strengthening rib is provided in the central part office of described primary blades and described auxiliary blade along the described direction of described running shaft.
4. centrifugal multi-blade fan as claimed in claim 1 is characterized in that, described strengthening rib connects the radial outer end portion of described primary blades and the radial inner end of described auxiliary blade.
5. centrifugal multi-blade fan as claimed in claim 1 is characterized in that the radial inner end of described auxiliary blade is arranged in inner radial with respect to the radial outer end of described primary blades.
6. centrifugal multi-blade fan as claimed in claim 1, it is characterized in that, described auxiliary blade is arranged between the primary blades that is adjacent to each other, and the gap between the suction surface of a described like this auxiliary blade and a primary blades is just greater than the gap between the pressure surface of described auxiliary blade and another primary blades.
7. centrifugal multi-blade fan as claimed in claim 1 is characterized in that, described primary blades that is adjacent to each other and described auxiliary blade form an integral body.
8. centrifugal multi-blade fan as claimed in claim 1 is characterized in that, the described primary blades and the described auxiliary blade that are adjacent to each other form wing cross section.
9. centrifugal multi-blade fan as claimed in claim 1 is characterized in that, described multi blade fan portion is all integrally formed by resin.
10. centrifugal multi-blade fan, comprise multi blade fan portion, described multi blade fan portion has a plurality of blades of along the circumferential direction arranging around running shaft, an end along the axial described a plurality of blades of described rotation is connected on the drive plate that connects on the described running shaft, another end along described a plurality of blades of the described direction of described running shaft is connected to each other by connecting ring, rotation by described multi blade fan portion, described multi blade fan is from the radial inner end suction air of the part between the blade that is adjacent to each other, and radial outer end exhausting air from the described part between the blade that is adjacent to each other, it is characterized in that, described blade comprises a plurality of primary blades that place the inner radial position and a plurality of auxiliary blades that place the radially outer position, each auxiliary blade is arranged in each in the air-flow that forms between the primary blades, each primary blades and place each auxiliary blade of the pressure surface side of described each primary blades to be connected to each other by strengthening rib, and otch be provided on the described connecting ring with the projection plane corresponding position of described strengthening rib on along the described direction projection of described running shaft to described connecting ring on.
11. centrifugal multi-blade fan as claimed in claim 10 is characterized in that, described strengthening rib is provided in the central part office of described primary blades and described auxiliary blade along the described direction of described running shaft.
12. centrifugal multi-blade fan as claimed in claim 10 is characterized in that, described strengthening rib connects the radial outer end portion of described primary blades and the radial inner end of described auxiliary blade.
13. centrifugal multi-blade fan as claimed in claim 10 is characterized in that, the radial inner end of described auxiliary blade is arranged in inner radial with respect to the radial outer end of described primary blades.
14. centrifugal multi-blade fan as claimed in claim 10, it is characterized in that, described auxiliary blade is arranged between the primary blades that is adjacent to each other, and the gap between the suction surface of a described like this auxiliary blade and a primary blades is just greater than the gap between the pressure surface of described auxiliary blade and another primary blades.
15. centrifugal multi-blade fan as claimed in claim 10 is characterized in that, described primary blades that is adjacent to each other and described auxiliary blade form an integral body.
16. centrifugal multi-blade fan as claimed in claim 10 is characterized in that, the described primary blades and the described auxiliary blade that are adjacent to each other form wing cross section.
17. centrifugal multi-blade fan as claimed in claim 10 is characterized in that, described multi blade fan portion is all integrally formed by resin.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005027643 | 2005-02-03 | ||
| JP2005027643A JP4726506B2 (en) | 2005-02-03 | 2005-02-03 | Centrifugal multi-blade fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1818394A true CN1818394A (en) | 2006-08-16 |
Family
ID=36918544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610059225 Pending CN1818394A (en) | 2005-02-03 | 2006-02-03 | Centrifugal multiple-blade fan |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4726506B2 (en) |
| CN (1) | CN1818394A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106855055A (en) * | 2015-12-09 | 2017-06-16 | 苏州三星电子有限公司 | Two stage centrifugal fan, blower fan and air-conditioner |
| CN111828162A (en) * | 2018-06-29 | 2020-10-27 | 陈科 | Heat radiator for be used for automobile engine |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6990026B2 (en) * | 2017-02-16 | 2022-01-12 | シャープ株式会社 | How to manufacture electric blowers, vacuum cleaners, and impellers |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004060447A (en) * | 2002-07-24 | 2004-02-26 | Sanden Corp | Multiblade blower |
-
2005
- 2005-02-03 JP JP2005027643A patent/JP4726506B2/en not_active Expired - Fee Related
-
2006
- 2006-02-03 CN CN 200610059225 patent/CN1818394A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106855055A (en) * | 2015-12-09 | 2017-06-16 | 苏州三星电子有限公司 | Two stage centrifugal fan, blower fan and air-conditioner |
| CN111828162A (en) * | 2018-06-29 | 2020-10-27 | 陈科 | Heat radiator for be used for automobile engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4726506B2 (en) | 2011-07-20 |
| JP2006214338A (en) | 2006-08-17 |
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