CN207261316U - Centrifugal blower volute structure - Google Patents
Centrifugal blower volute structure Download PDFInfo
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- CN207261316U CN207261316U CN201721352626.4U CN201721352626U CN207261316U CN 207261316 U CN207261316 U CN 207261316U CN 201721352626 U CN201721352626 U CN 201721352626U CN 207261316 U CN207261316 U CN 207261316U
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—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
- F04D29/4226—Fan casings
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- 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
- F05D2250/00—Geometry
- F05D2250/50—Inlet or outlet
- F05D2250/52—Outlet
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A kind of centrifugal blower volute structure, including foreboard (1), backboard (3) and ring wall coaming plate (2), foregoing ring wall coaming plate (2) is connected the foreboard (1) and backboard (3) with the warp surface of continuously smooth transition, and upper end forms air outlet, foregoing ring wall coaming plate (2) is in an overall molded line, it is characterised in that：The overall molded line includes starting straightway (AB), volute tongue arc section (BC), logarithmic spiral line segment (CD), middle straight line section (DE), spiral of Archimedes section (EF), transition circle segmental arc (GH) and termination straightway (HK) and is formed by connecting successively.Compared with prior art, it is good with fluency, noise reduction clear advantage.
Description
Technical field
A kind of centrifugal blower, more particularly to the spiral case of centrifugal blower are the utility model is related to, which mainly applies
In on range hood.
Background technology
Centrifugal blower has obtained extensive reference with the advantages that its suction is big, noise is low, compact-sized in range hood.
Spiral case is one of core component of centrifugal blower, and it is to concentrate the gas for leaving impeller that it, which is acted on, is exported to volute outlet, and will
Dynamic pressure is changed into static pressure.The volute structure of existing centrifugal blower includes spiral case top plate, spiral case bottom plate and connection spiral case top plate, spiral case
Remaining molded line in addition to volute tongue position is consistent with spiral case bottom plate for the spiral case coaming plate of bottom plate, wherein spiral case top plate.Conventional volute design one
As carried out by a metatheory, have two it is assumed that i.e. flow parameter is uniformly distributed and spiral case interior air-flow is moved on hypothesis import circumference
Moment preserving is measured, the spiral case inlet pressure by unitary Theoretical Design is usually equiangular helical spiral.But actually due to the non-axis pair of volute shape
Claim, particularly the influence of volute tongue, can form a pressure field heterogeneous in impeller outlet, impeller outlet, i.e. snail will necessarily be made
Shell inlet flow field is uneven.Due to a metatheory do not consider in spiral case circumferential plane the heterogeneity of import circumference flow parameter with
The influence in flow field, thus it is bad by the spiral case performance that this Theoretical Design comes out, deteriorate more especially in high back pressure working status
Substantially.In addition, centrifugal blower volute near exit is provided with volute tongue, the effect of volute tongue is to carry out the gas for being oriented to volute outlet
Shunting, prevents portion gas in spiral case internal circulation flow, the shape and form of volute tongue to centrifugal blower air quantity, wind pressure, efficiency with
And noise suffers from material impact.
The volute structure of various centrifugal blowers is also disclosed that in the prior art, such as Patent No. ZL 201110118687.5
Disclosed in the Chinese invention patent of (Authorization Notice No. is 102182707 B of CN)《A kind of centrifugal blower used for range hood and its
Spiral case inlet pressure generation method》, which includes spiral case top plate, spiral case bottom plate and spiral case coaming plate, the wheel in spiral case coaming plate medial type face
Profile is spiral case inlet pressure, and spiral case inlet pressure is by first straight line DE, the first circular arc line EF, the second circular arc line FG, helix GH, second straight
Line segment HI, which smoothly transits, to be formed by connecting, although after spiral case uses above-mentioned spiral case inlet pressure, being conducive to improve centrifugal blower air quantity, wind
Pressure, efficiency simultaneously reduce aerodynamic noise, but the volute structure is again without taking into full account in spiral case circumferential plane that import circumference flows
The heterogeneity of parameter and the influence in flow field, need to be further improved.
The applicant has made many researchs in this respect, sees the Chinese invention patent of Patent No. ZL200610050640.9
《The blower volute structure of European-style range hood that can be double-faced ventilated》(Authorization Notice No. CN100371645C)；Patent No.
The Chinese invention patent of ZL201510530944.4《A kind of centrifugal blower volute》(Authorization Notice No. CN105041722B)；Also
It may be referred to the Chinese invention patent of Patent No. ZL201510254055.X《A kind of centrifugal blower volute》(Authorization Notice No. is
CN104847699B), above-mentioned patent is that design is optimized to the ring wall or cover board of composition spiral case, to improve fluency,
So as to reduce the purpose of resistance and noise.
Utility model content
Technical problem to be solved in the utility model is in addition to provide a kind of fluency for the above-mentioned state of the art
The centrifugal blower volute structure of Canon's noise reduction.
Technical solution is used by the utility model solves above-mentioned technical problem：A kind of centrifugal blower volute structure, bag
Foreboard, backboard and ring wall coaming plate are included, advance air holes is offered in the middle part of foregoing foreboard, rear inlet air is offered in the middle part of foregoing backboard
Hole, foregoing ring wall coaming plate are connected the foreboard and backboard with the warp surface of continuously smooth transition, and upper end forms outlet air
Mouthful, for foregoing ring wall coaming plate in an overall molded line, which corresponds to volute tongue position, clearing end adjacent to air outlet,
It is characterized in that：The overall molded line includes starting straightway, volute tongue arc section, logarithmic spiral line segment, middle straight line successively
Section, spiral of Archimedes section, transition circle segmental arc and termination straightway are formed by connecting, also, foregoing starting straightway and snail
Tongue arc section, volute tongue arc section and logarithmic spiral line segment, spiral of Archimedes section and transition circle segmental arc, transition circle segmental arc and end
The only tangent connection of straightway.
The advance air holes is circle, and the length of the starting straightway is less than or equal to the radius of advance air holes, also,
The extended line of the starting straightway and the angle α of horizontal direction, meet 45 °≤α≤90 °.
The starting point of the logarithmic spiral line segment forms starting connecting line, starting connection with the circle center line connecting of advance air holes
Line is Φ 1 with being crossed to form angle by the horizontal line in the advance air holes center of circle, meets 1≤85 ° of 50 °≤Φ；
The terminating point of the logarithmic spiral line segment is formed with the circle center line connecting of advance air holes terminates connecting line, termination connection
Line is Φ 2 with being crossed to form angle by the horizontal line in the advance air holes center of circle, meets 2≤180 ° of 160 °≤Φ；
The connecting line distance in the center of circle of each point to advance air holes is R1 on the logarithmic spiral line segment, meets R1=r × e(s1-x)Φ, wherein r is the radius of advance air holes, and s1 is constant, related with impeller parameters and metered flow, and x is correction factor, 0 ＜
x≤0.15；Multiple R1 values are can obtain using different x values under different angle Φ, and are fitted to form approximation with spline curve transition
Logarithmic spiral line segment, each point x values are followed successively by x1、x2……xn-1、xn, meet relational expression xn=axn-1, a values scope 1~
1.2, the Φ connecting lines for each point on logarithmic spiral line segment to the center of circle of advance air holes and the horizontal line by the advance air holes center of circle
It is crossed to form angle.
Further, the middle straight line section intersects in 90 ° with by the horizontal line in the advance air holes center of circle, the middle straight line
The connecting line in the terminating point of section to the center of circle of advance air holes is crossed to form angle Φ 3 with passing through the horizontal line in the advance air holes center of circle,
Meet 180 °<Φ3≤210°.
Further, the spiral of Archimedes section uses revised Archimedes spiral equation, meets formula R2
=r+r (s2-t) Φ 4, wherein, s2 is constant, related with impeller parameters and metered flow, and t is correction value, different angle Φ 4
It is lower that multiple R2 values can obtain using different t values, and be into approximate spiral of Archimedes section, Φ 4 with spline curve fitting
Connecting line to each point in spiral of Archimedes section to the center of circle of advance air holes and the horizontal line phase by the advance air holes center of circle
Friendship forms angle, 4=360 ° of spiral of Archimedes section terminating point corresponding angle, φ, and each point t values are followed successively by t1、t2……
tn-1、tn, meet relational expression tn=btn-1, b values scope is in 1~1.2,0 ＜ t≤0.2.
Further, circular curve end terminating point is to the connecting line in the center of circle of advance air holes and by the advance air holes center of circle
Horizontal line to be crossed to form angle be Φ 5, meet 360 °<Φ5≤390°.
Further, the terminating point for terminating straightway is flushed with originating the starting point of straightway, the termination straightway
Connecting line of the terminating point to the center of circle of advance air holes to be crossed to form angle with the horizontal line by the advance air holes center of circle be Φ 6,
Meet 6≤90 ° of 75 °≤Φ.
Further, the center of circle of the advance air holes backboard projection in the plane overlapped with the center of circle of rear air inlet hole,
The radius of the radius and rear air inlet hole of the advance air holes is isometric.
Further, it is connected after the foreboard lower end bending with ring wall coaming plate, 15 °~75 ° of bending angle.
Further, it is connected after the backboard lower end bending with ring wall coaming plate, 15 °~75 ° of bending angle.
Further, the lower end of the ring wall coaming plate offers oil leaking hole.
Further, the foreboard is provided with baffle liner around advance air holes, the radius of the baffle liner and the half of rear air inlet hole
Footpath is isometric.
Compared with prior art, the utility model has the advantage of：Ring wall coaming plate using optimization after log spiral, Ah
Three kinds of Alignment Designs of base Mead helix and straight line, it is reasonably combined, increase straightway, and influencing spiral case flow field less as far as possible
Under the premise of accomplish the Casing width of smaller, ring wall coaming plate entirety molded line is more met the track of air-flow flowing, make an uproar so as to reduce
Sound and crushing, improve air quantity.
Brief description of the drawings
Fig. 1 is 1 structure diagram of embodiment.
Fig. 2 is volute structure schematic diagram in Fig. 1.
Fig. 3 is the exploded view of Fig. 2.
Fig. 4 is the plan view of foreboard in Fig. 2.
Fig. 5 is the plan view of ring wall coaming plate in Fig. 2.
Fig. 6 is the mark figure of Fig. 4.
Fig. 7 is the mark figure of foreboard in embodiment 2.
Fig. 8 is the mark figure of foreboard in embodiment 3.
Fig. 9 is the mark figure of foreboard in comparative example.
Embodiment
The utility model is described in further detail below in conjunction with attached drawing embodiment.
As shown in Figure 1, the centrifugal blower in the present embodiment includes spiral case 10 and wind wheel 6 and driving wind in spiral case 10
The motor 7 that wheel 6 rotates.
As shown in Figures 2 and 3, spiral case 10 includes foreboard 1, backboard 3 and ring wall coaming plate 2, and the middle part of foreboard 1 offers advance
Air holes 11, the middle part of backboard 3 offer rear air inlet hole 31, and ring wall coaming plate 2 by foreboard 1 and is carried on the back with the warp surface of continuously smooth transition
Plate 3 connects, and upper end forms air outlet, and air outlet is equipped with connecting flange 5, and for ring wall coaming plate 2 in an overall molded line, this is whole
Build line initiating terminal corresponds to volute tongue position, and clearing end is adjacent to air outlet.
The center of circle of advance air holes 11 backboard 3 projection in the plane overlapped with the center of circle of rear air inlet hole 31, advancing air
The radius in hole 11 and the radius of rear air inlet hole 31 are isometric.It is connected after the bending of 1 lower end of foreboard with ring wall coaming plate 2,15 ° of bending angle~
75°.It is connected after the bending of 3 lower end of backboard with ring wall coaming plate 2,15 °~75 ° of bending angle.The lower end of ring wall coaming plate 2 offers oil leak
Hole 21.Foreboard 1 is provided with baffle liner 4 around advance air holes 11, and the radius of the baffle liner 4 and the radius of rear air inlet hole 31 are isometric.
With reference to shown in Fig. 4, the overall molded line of ring wall coaming plate 2 includes starting straightway AB, volute tongue arc section BC, logarithm successively
Helical segment CD, middle straight line section DE, spiral of Archimedes section EF, transition circle segmental arc GH and terminate straightway HK connections and
Into, also, originate straightway AB and volute tongue arc section BC, volute tongue arc section BC and logarithmic spiral line segment CD, Archimedian screw
Line segment EF is with transition circle segmental arc GH, transition circle segmental arc GH with terminating the tangent connections of straightway HK.
The circle center line connecting of point advance air holes 11 on overall molded line forms connecting line, and the connecting line is with passing through advance air holes 11
It is Φ that the horizontal line in the center of circle, which is crossed to form angle,.It is R that the circle center line connecting of point advance air holes 11 on overall molded line, which forms connecting line,.
The length for originating straightway AB is less than or equal to the radius of advance air holes 11, also, originates the extended line of straightway AB
With the angle α of horizontal direction, meet 45 °≤α≤90 °.
The starting point of logarithmic spiral line segment CD, meets 50 °≤Φ≤85 °；
The terminating point of logarithmic spiral line segment CD, meets 160 °≤Φ≤180 °；
Each point on logarithmic spiral line segment CD, meets R=r × e(s1-x)Φ, wherein r is the radius of advance air holes 11, and s1 is normal
Number, related with impeller parameters and metered flow, x is correction factor, 0 ＜ x≤0.15；Different x values are used under different angle Φ
Multiple R values are can obtain, and are fitted to form approximate logarithmic spiral line segment CD with spline curve transition, each point x values are followed successively by x1、
x2……xn-1、xn, meet relational expression xn=axn-1, a values scope 1~1.2,
Middle straight line section DE intersects in 90 ° with by the horizontal line in advance air holes 11 center of circle, the termination of middle straight line section DE
Point, meets 180 °<Φ3≤210°.
Spiral of Archimedes section EF uses revised Archimedes spiral equation, meets formula
R2=r+r (s2-t) Φ 4, wherein t are correction value, and multiple R are can obtain using different t values under different angle Φ
Value, and with spline curve fitting into approximate spiral of Archimedes section EF, Φ is to each point on spiral of Archimedes section EF
Connecting line to the center of circle of advance air holes 11 is crossed to form angle, Archimedes's spiral shell with passing through the horizontal line in 11 center of circle of advance air holes
Corresponding angle, φ=360 ° of spin line section EF terminating points, each point t values are followed successively by t1、t2……tn-1、tn, meet relational expression tn=
btn-1, b values scope is in 1~1.2,0 ＜ t≤0.2.
Circular curve end terminating point, meets 360 °<Φ≤390°.
The terminating point for terminating straightway HK is flushed with originating the starting point of straightway AB, terminates the terminating point of straightway HK,
Meet 75 °≤Φ≤90 °.
Spiral case overall width is 312mm, thickness 172mm, for European type cooker hood in the present embodiment.
With reference to shown in Fig. 5 and Fig. 6, ring wall coaming plate entirety molded line each point meets as follows：
| Angle | Radius mm | Angle | Radius mm | Angle | Radius mm | Angle | Radius mm |
| -27° | 115.88 | 60° | 130.76 | 170° | 153.60 | 260° | 175.22 |
| -20° | 116.78 | 70° | 132.67 | 180° | 155.86 | 270° | 177.78 |
| -10° | 118.23 | 75° | 133.62 | 190° | 158.16 | 280° | 180.43 |
| 0° | 119.75 | 114° | 141.55 | 200° | 160.49 | 286° | 182.12 |
| 10° | 121.54 | 120° | 142.76 | 210° | 162.85 | ||
| 20° | 123.31 | 130° | 144.87 | 220° | 165.25 | ||
| 30° | 125.13 | 140° | 147.00 | 230° | 167.70 | ||
| 40° | 127.00 | 150° | 149.17 | 240° | 170.16 | ||
| 50° | 128.87 | 160° | 151.37 | 250° | 172.67 |
Embodiment 2, spiral case overall width is 312mm, thickness 172mm, for European type cooker hood in the present embodiment.Ring
Wall coaming plate entirety molded line meets as shown in fig. 7, length unit is mm.Other structures reference implementation example 1.
Embodiment 3, spiral case overall width is 312mm, thickness 172mm, for European type cooker hood in the present embodiment.Ring
Wall coaming plate entirety molded line meets as shown in figure 8, length unit is mm.Other structures reference implementation example 1.
Comparative example, the present embodiment use the design of patent (ZL200610050640.9) before the applicant, ring wall
Coaming plate entirety molded line meets as shown in figure 9, length unit is mm.Other structures reference implementation example 1.
Using under identical impeller and motor conditions, following test data is obtained, see the table below.
| Case | Maximum quantity of wind m3/min | Noise dB | Maximum static pressure Pa | Total pressure efficiency % |
| Former scheme | 14.5 | 55.8 | 298 | 27.4 |
| Embodiment 1 | 15.2 | 54.5 | 346 | 27 |
| Embodiment 2 | 14.8 | 54.8 | 352 | 27.5 |
| Embodiment 3 | 15.4 | 55.4 | 330 | 27.2 |
As it can be seen that air quantity and maximum static pressure lifting are obvious, lower noise is notable, illustrates that ring wall coaming plate entirety molded line can more meet
The track of air-flow flowing.
Claims (12)
1. a kind of centrifugal blower volute structure, including foreboard (1), backboard (3) and ring wall coaming plate (2), the middle part of foregoing foreboard (1)
Advance air holes (11) is offered, rear air inlet hole (31) is offered in the middle part of foregoing backboard (3), foregoing ring wall coaming plate (2) is with continuous
The warp surface seamlessly transitted connects the foreboard (1) and backboard (3), and upper end forms air outlet, foregoing ring wall coaming plate
(2) volute tongue position is corresponded in an overall molded line, the entirety molded line initiating terminal, clearing end is adjacent to air outlet, it is characterised in that：Institute
The overall molded line stated includes starting straightway (AB), volute tongue arc section (BC), logarithmic spiral line segment (CD), middle straight line section successively
(DE), spiral of Archimedes section (EF), transition circle segmental arc (GH) and termination straightway (HK) are formed by connecting, also, foregoing
Originate straightway (AB) and volute tongue arc section (BC), volute tongue arc section (BC) and logarithmic spiral line segment (CD), Archimedian screw
Line segment (EF) is with transition circle segmental arc (GH), transition circle segmental arc (GH) with terminating straightway (HK) tangent connection.
2. centrifugal blower volute structure according to claim 1, it is characterised in that the advance air holes (11) is circle,
The length of the starting straightway (AB) is less than or equal to the radius of advance air holes (11), also, the starting straightway (AB)
The angle α of extended line and horizontal direction, meets 45 °≤α≤90 °.
3. centrifugal blower volute structure according to claim 1, it is characterised in that the logarithmic spiral line segment (CD) is risen
Initial point and the circle center line connecting of advance air holes (11) form starting connecting line, and the starting connecting line is with passing through advance air holes (11) center of circle
Horizontal line to be crossed to form angle be Φ 1, meet 1≤85 ° of 50 °≤Φ；
The terminating point of the logarithmic spiral line segment (CD) forms with the circle center line connecting of advance air holes (11) and terminates connecting line, the termination
Connecting line is Φ 2 with being crossed to form angle by the horizontal line in advance air holes (11) center of circle, meets 2≤180 ° of 160 °≤Φ；
The connecting line distance in the center of circle of each point to advance air holes (11) is R1 on the logarithmic spiral line segment (CD), meets R1=r
×e(s1-x)Φ, wherein r is the radius of advance air holes (11), and s1 is constant, related with impeller parameters and metered flow, and x is amendment
Coefficient, 0 ＜ x≤0.15；Multiple R1 values are can obtain using different x values under different angle Φ, and are fitted with spline curve transition
Approximate logarithmic spiral line segment (CD) is formed, each point x values are followed successively by x1、x2……xn-1、xn, meet relational expression xn=axn-1, a values
Scope is advanced in the connecting line that 1~1.2, Φ is each point to the center of circle of advance air holes (11) on logarithmic spiral line segment (CD) with passing through
The horizontal line in air holes (11) center of circle is crossed to form angle.
4. centrifugal blower volute structure according to claim 3, it is characterised in that the middle straight line section (DE) is with passing through
The horizontal line in advance air holes (11) center of circle intersects in 90 °, the terminating point of the middle straight line section (DE) to advance air holes (11)
The connecting line in the center of circle meets 180 ° with being crossed to form angle Φ 3 by the horizontal line in advance air holes (11) center of circle<Φ3≤210°.
5. centrifugal blower volute structure according to claim 4, it is characterised in that the spiral of Archimedes section (EF)
Using revised Archimedes spiral equation, meet formula R2=r+r (s2-t) Φ 4, wherein, s2 is constant, with impeller
Parameter is related with metered flow, and t is correction value, and 4 times different t values of use of different angle Φ can obtain multiple R2 values, and use sample
For bar curve matching into approximate spiral of Archimedes section (EF), Φ 4 is before being arrived to each point in spiral of Archimedes section (EF)
The connecting line in the center of circle of air inlet hole (11) by the horizontal line in advance air holes (11) center of circle with being crossed to form angle, Archimedes's spiral shell
Corresponding 4=360 ° of the angle, φ of spin line section (EF) terminating point, each point t values are followed successively by t1、t2……tn-1、tn, meet relational expression tn
=btn-1, b values scope is in 1~1.2,0 ＜ t≤0.2.
6. centrifugal blower volute structure according to claim 4, it is characterised in that before circular curve end terminating point arrives
The connecting line in the center of circle of air inlet hole (11) is Φ 5 with being crossed to form angle by the horizontal line in advance air holes (11) center of circle, is met
360°<Φ5≤390°。
7. centrifugal blower volute structure according to claim 6, it is characterised in that the termination for terminating straightway (HK)
Point is flushed with the starting point of starting straightway (AB), the center of circle of the terminating point for terminating straightway (HK) to advance air holes (11)
Connecting line to be crossed to form angle be Φ 6 with the horizontal line by advance air holes (11) center of circle, meet 6≤90 ° of 75 °≤Φ.
8. centrifugal blower volute structure according to claim 1, it is characterised in that the center of circle of the advance air holes (11) exists
Backboard (3) projection in the plane overlapped with the center of circle of rear air inlet hole (31), the radius of the advance air holes (11) with it is laggard
The radius of air holes (31) is isometric.
9. centrifugal blower volute structure according to claim 1, it is characterised in that after the bending of foreboard (1) lower end with ring
Wall coaming plate (2) connects, 15 °~75 ° of bending angle.
10. the centrifugal blower volute structure according to claim 1 or 9, it is characterised in that after backboard (3) the lower end bending
It is connected with ring wall coaming plate (2), 15 °~75 ° of bending angle.
11. centrifugal blower volute structure according to claim 1, it is characterised in that open the lower end of the ring wall coaming plate (2)
Equipped with oil leaking hole (21).
12. centrifugal blower volute structure according to claim 1, it is characterised in that the foreboard (1) surrounds advance air holes
(11) baffle liner (4) is provided with, the radius of the radius and rear air inlet hole (31) of the baffle liner (4) is isometric.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721352626.4U CN207261316U (en) | 2017-10-18 | 2017-10-18 | Centrifugal blower volute structure |
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|---|---|---|---|
| CN201721352626.4U CN207261316U (en) | 2017-10-18 | 2017-10-18 | Centrifugal blower volute structure |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108592200A (en) * | 2018-05-10 | 2018-09-28 | 青岛海尔空调电子有限公司 | One kind, which is hung, to be fallen machine supply air system and hangs the machine of falling |
| CN109253113A (en) * | 2018-11-02 | 2019-01-22 | 浙江工业大学 | Volute Profile of Multi-blade Centrifugal Fan design method used for range hood and its multi-wing centrifugal fan spiral case |
| CN110145493A (en) * | 2019-04-24 | 2019-08-20 | 宁波方太厨具有限公司 | A kind of centrifugal blower volute for range hood |
| TWI676741B (en) * | 2018-05-21 | 2019-11-11 | 日商三菱電機股份有限公司 | Centrifugal blower, air supply device, air conditioner, and refrigeration cycle device |
| CN111159792A (en) * | 2020-01-07 | 2020-05-15 | 宁波方太厨具有限公司 | Volute profile generation method of centrifugal fan |
| CN114876830A (en) * | 2022-04-26 | 2022-08-09 | 杭州老板电器股份有限公司 | Volute, fan and range hood |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108592200A (en) * | 2018-05-10 | 2018-09-28 | 青岛海尔空调电子有限公司 | One kind, which is hung, to be fallen machine supply air system and hangs the machine of falling |
| TWI676741B (en) * | 2018-05-21 | 2019-11-11 | 日商三菱電機股份有限公司 | Centrifugal blower, air supply device, air conditioner, and refrigeration cycle device |
| CN109253113A (en) * | 2018-11-02 | 2019-01-22 | 浙江工业大学 | Volute Profile of Multi-blade Centrifugal Fan design method used for range hood and its multi-wing centrifugal fan spiral case |
| CN110145493A (en) * | 2019-04-24 | 2019-08-20 | 宁波方太厨具有限公司 | A kind of centrifugal blower volute for range hood |
| CN111159792A (en) * | 2020-01-07 | 2020-05-15 | 宁波方太厨具有限公司 | Volute profile generation method of centrifugal fan |
| CN111159792B (en) * | 2020-01-07 | 2023-08-18 | 宁波方太厨具有限公司 | Volute molded line generation method of centrifugal fan |
| CN114876830A (en) * | 2022-04-26 | 2022-08-09 | 杭州老板电器股份有限公司 | Volute, fan and range hood |
| CN114876830B (en) * | 2022-04-26 | 2024-05-10 | 杭州老板电器股份有限公司 | Spiral case, fan and lampblack absorber |
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