CN209704924U - A kind of collector for centrifugal blower - Google Patents
A kind of collector for centrifugal blower Download PDFInfo
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- CN209704924U CN209704924U CN201920015837.1U CN201920015837U CN209704924U CN 209704924 U CN209704924 U CN 209704924U CN 201920015837 U CN201920015837 U CN 201920015837U CN 209704924 U CN209704924 U CN 209704924U
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- noise reduction
- diversion division
- reduction unit
- centrifugal blower
- flow
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Abstract
The utility model discloses a kind of collectors for centrifugal blower, including baffle liner, the baffle liner includes circular retainer plate and diversion division, the retainer plate has central axis, opposite first direction and second direction are formed along central axis, oil smoke flow path is along the second direction, the diversion division includes radially inside extending internally by retainer plate, and the first diversion division being bent and protruded to first direction, and the second diversion division extended by the inside of the first diversion division along second direction, it is characterized by: the baffle liner further includes the denoising device being connected and fixed with retainer plate or diversion division, the outside of the second diversion division is arranged in the denoising device, space between the denoising device and diversion division forms noise reduction cavity, noise reduction hole is offered on noise reduction cavity wall corresponding with denoising device.
Description
Technical field
The utility model relates to machine for kitchen use technical field, especially a kind of collector for centrifugal blower.
Background technique
Domestic cooking fume remover is realized using centrifugal blower to be extracted oil laden air out kitchen and is discharged into common flue or direct
Outdoor is excluded, to improve air inflow condition, blower working efficiency is improved, reduces noise, one is arranged usually at fan inlet
The design quality of collector, collector can directly affect fan performance and running noises.
As the Chinese utility model patent application No. is 201720130595.1 disclose a kind of collector and with it
Centrifugal blower, range hood, the collector include: the retainer plate extended radially outward；Air ring out, the air ring connection out
In the inner edge of the retainer plate, and the air ring out prolongs along the direction far from the retainer plate that is axially facing of the retainer plate
It stretches, one end far from the retainer plate of the air ring out has tooth-shape structure.
It can when air-flow flows through air ring out although tooth-shape structure is arranged by one end of the separate retainer plate in air ring out
To reduce noise, but there are biggish cavity area between collector inner surface and impeller, this region is deposited since pressure difference is larger
In very big flowing whirlpool, wideband flow noise can be generated, above-mentioned collector can not eliminate the noise in this region.
Utility model content
Technical problem to be solved in the utility model is to provide one kind for the above-mentioned problems of the prior art to be used for
The collector of centrifugal blower can improve noise reduction effect.
Technical solution adopted by the utility model to solve the above technical problems is as follows: a kind of afflux for centrifugal blower
Device, including baffle liner, the baffle liner include circular retainer plate and diversion division, and the retainer plate has central axis, edge
Central axis form opposite first direction and second direction, oil smoke flow path is along the second direction, the water conservancy diversion
Portion includes from the first diversion division for radially inside extending internally and being bent and protruded to first direction of retainer plate, and by first
The second diversion division that the inside of diversion division extends along second direction, it is characterised in that: the baffle liner further includes and retainer plate
Or the denoising device that diversion division is connected and fixed, the denoising device are arranged in the outside of the second diversion division, the denoising device with
Space between diversion division forms noise reduction cavity, offers noise reduction hole on noise reduction cavity wall corresponding with denoising device.
Preferably, the structure of denoising device is that the denoising device is outside including being spaced apart and arranged in the second diversion division diameter
First noise reduction unit of side and with spaced second noise reduction unit of the first diversion division, on oil smoke flow path, described second
Noise reduction unit is located at the downstream of the first diversion division, and second noise reduction unit is in circular ring shape and radially inner side is remote with the second diversion division
One end from the first diversion division links into an integrated entity, and first noise reduction unit is connected to radial outside and the edge of the second noise reduction unit
First direction it is axially extending, the noise reduction cavity be formed in the first diversion division, the second diversion division, the first noise reduction unit and second drop
It makes an uproar between portion, the noise reduction hole is provided in the first noise reduction unit and the second noise reduction unit.
For the ease of installing sound-absorbing ring, first noise reduction unit includes the noise reducing plate of two pieces or more arcs, the noise reducing plate
Arranged for interval in the circumferential, and end of each noise reducing plate far from retainer plate is connect with the radial outside of the second noise reduction unit, drop
The junction between plate and the second noise reduction unit of making an uproar offers multiple waist-shaped holes spaced apart in the circumferential, so that the noise reducing plate
It can be bent with respect to the second noise reduction unit.
Further, also ensure that the first noise reduction unit has enough intensity, adjacent two pieces of noise reducing plates to bend convenient for noise reducing plate
Between the angle that is spaced be α, the value range of α is 5 °~15 °.
Further, be to improve noise reduction effect, be provided in the noise reduction cavity it is compatible with noise reduction cavity shape, by inhaling
Sound-absorbing ring made of sound material.
Preferably, to have preferable guiding function to oil smoke air-flow, second diversion division connect one with the first diversion division
The diameter at end is D1, and diameter of second diversion division far from first diversion division one end is D2, and the value range of above-mentioned diameter is
0.7≤D2/D1≤1。
In order to play the role of rectification, broken whirlpool and to filtering oil smoke, it may be provided with and lead on the inside of second diversion division
Drift net, the flow-guiding screen include a plurality of flow guide bar radially outward radially arranged and whole for connecting into each flow guide bar
The fixed ring of body.
In order to reduce flow separation phenomenon, flow resistance is reduced, the section of the flow guide bar can be symmetrical airfoil, described to lead
The chord length for flowing a section is Z, and the value range of Z is 3mm~10mm.
To be conducive to collide with oil smoke, intercepting efficiency is improved, the flow-guiding screen is whole in the form of a truncated cone and edge
First direction bore be gradually reduced.
Preferably, to ensure filter effect, and avoid biggish windage, the diversion division along central axis axis
It is L to height, the flow-guiding screen is H, 0.5L≤H≤2L along the axial height of central axis.
Further, the effect of prewhirling is formed for the entrance cooking fume stream to collector, reduces cooking fume stream and enters centrifugal blower
Impeller impact loss, projection of each flow guide bar in the plane with central axis upright be arc-shaped, the throwing of each flow guide bar
The bending direction of shadow is identical, and the bending angle of the projection of the flow guide bar is θ, and 60 °≤θ≤120 °.
Compared with the prior art, the advantages of the utility model are: there is leading for diversion division and denoising device by setting
Stream circle can play guide functions to oil smoke air-flow but also reduce the noise that the flowing whirlpool at this generates；Pass through
The sound-absorbing ring made of the noise reduction hole that the first noise reduction unit and the second noise reduction unit open up and acoustic damping materials cooperates, and can play simultaneously micro-
The function of hole noise reduction and absorbing sound and lowering noise can be effectively reduced and be generated because flowing whirlpool between the inner surface of collector and impeller
Noise.
Detailed description of the invention
Fig. 1 is the schematic diagram of the collector of the utility model embodiment；
Fig. 2 is the schematic diagram at another visual angle of the collector of the utility model embodiment；
Fig. 3 is the side sectional view of the collector of the utility model embodiment；
Fig. 4 is the exploded view of the collector of the utility model embodiment；
Fig. 5 is the baffle liner of the collector of the utility model embodiment and the cross-sectional view of denoising device；
Fig. 6 is the projection view of the flow-guiding screen of the collector of the utility model embodiment；
Fig. 7 is the cross-sectional view of the flow guide bar of the collector of utility model embodiment.
Specific embodiment
The utility model is described in further detail below in conjunction with figure embodiment.
Referring to figs. 1 to 4, a kind of collector for centrifugal blower, including baffle liner 1, sound-absorbing ring 3 and flow-guiding screen 4.
Structure same as the prior art can be used in baffle liner 1, including circular retainer plate 11 and diversion division 12.It is fixed
Circle 11 has central axis X, and opposite first direction X1 and second direction X2 are formed along central axis X, as shown in Figure 1 upwards
First direction X1 and downward second direction X2, the flow path of oil smoke is to flow along second direction X2.On retainer plate 11
Fixation hole 111 is offered, is connected and fixed for the spiral case with centrifugal blower, fixation hole 111 can have multiple, be spaced in the circumferential
Arrangement.Diversion division 12 includes being led from first for radially inside extending internally and being bent and protruded to first direction X1 of retainer plate 11
Stream portion 121, and second diversion division 122 axially extending along second direction X2 by the inside of the first diversion division 121, first leads
Stream portion 121 and the tangent transition of the second diversion division 122.Air-flow can be smoothly directed to the impeller of centrifugal blower by diversion division 12, be subtracted
Few flow losses.The center of diversion division 12 is in the central axis X of retainer plate 11.
Second diversion division 122 can be cylindrical type, or frustoconical, at this time bore along second direction X2 by
It is decrescence small.The diameter that second diversion division 122 connect one end with the first diversion division 121 is D1, and the second diversion division 122 is led far from first
The diameter of 121 one end of stream portion is D2, and when the second diversion division 122 is that butt is tapered, the value range of above-mentioned diameter is 0.7≤D2/
D1≤1.Diversion division 12 is L along the axial height of central axial X, and L is not less than 10mm.
Baffle liner 1 further includes the denoising device 2 being connected and fixed with retainer plate 11 or diversion division 12.Between denoising device 2 includes
Every ground be arranged in 122 radial outside of the second diversion division the first noise reduction unit 21 and with the first diversion division 121 spaced
Two noise reduction units 22, on oil smoke flow path, the second noise reduction unit 22 is located at the downstream of the first diversion division 121.
In the present embodiment, denoising device 2 is connected and fixed with diversion division 12.First noise reduction unit 21 is along in retainer plate 11
Mandrel line X axis extends, and the second noise reduction unit 22 is in circular ring shape, and radially inner side and the second diversion division 122 are far from the first diversion division
121 one end links into an integrated entity.First noise reduction unit 21 is then connected to the radial outside of the second noise reduction unit 22, and along first party
It is axially extending to X1.The noise reducing plate 211 of first noise reduction unit 21 including muti-piece arc, the arranged for interval in the circumferential of noise reducing plate 211, and
And end of each noise reducing plate 211 far from retainer plate 11 is connect with the radial outside of the second noise reduction unit 22.Preferably, noise reducing plate
211 quantity is 3~8 sections.The angle (central angle between two pieces of noise reducing plates 211) being spaced between adjacent two pieces of noise reducing plates 211
For α, the value range of α is preferably 5 °~15 °, referring to Fig. 5.
Multiple noise reduction holes 23 are offered in first noise reduction unit 21 and the second noise reduction unit 22, noise reduction hole 23 can be circular hole,
It is also possible to other shapes, the noise reduction hole 23 in the present embodiment is circular hole, and aperture is 2~5mm.First diversion division 121, second are led
Space between stream portion 122, the first noise reduction unit 21 and the second noise reduction unit 22 forms noise reduction cavity 24.It is arranged in noise reduction cavity 24
There is, sound-absorbing material made of sound-absorbing ring 3 compatible with 24 shape of noise reduction cavity.Noise reducing plate 211 and the second noise reduction unit 22 it
Between junction offer multiple waist-shaped holes 25 spaced apart in the circumferential, enable the noise reducing plate 211 to be with this junction
Rotation axis, opposite second noise reduction unit 22 are bent to the direction far from the second diversion division 122, so as to install extremely sound-absorbing ring 3
In noise reduction cavity 24.When sound-absorbing ring 3 after the installation is completed, then by noise reducing plate 211 with respect to the second noise reduction unit 22 to close to the second water conservancy diversion
The direction in portion 122, which is bent, restores.Sound-absorbing ring 3 cooperates noise reduction hole 23 to play the function of micropore noise reduction and absorbing sound and lowering noise, and works as afflux
After the installation is completed, denoising device 2 and sound-absorbing ring 3 are located at the inside of centrifugal blower volute to device, and air-flow velocity is high herein, noise reduction effect
More preferably.
The inside of diversion division 12 is arranged above-mentioned flow-guiding screen 4, flow-guiding screen 4 include it is a plurality of radially outward radially arrange lead
Flow item 41 and for each flow guide bar 41 to be connected to integral fixed ring 42.Preferably, flow-guiding screen 4 is plastic material, bonding
In the inside of the second diversion division 122.Fixed ring 42 is annular in shape, passes through and fixes when each flow guide bar 41 extends radially outwardly
Ring 42, thus by fixed ring 42 connect it is integral, fixed ring 42 play the role of bearing and reinforce flow-guiding screen semi-finals degree.Water conservancy diversion
The center of net 4 is preferably in the central axis X of retainer plate 11.The quantity of fixed ring 42 is preferably 3~6, the present embodiment
In, fixed ring 42 is 3, and the starting point of each flow guide bar 41 is located in the circumferential direction for the fixed ring 42 that 4 center of flow-guiding screen is arranged in, separately
Outer two fixed rings 42 gradually amplify setting in concentric ring with the fixed ring 42 for being located at 4 center of flow-guiding screen.
Flow-guiding screen 4 is whole in the form of a truncated cone, and X1 bore is gradually reduced along a first direction.Due in the axial direction
Increase the tapering transition of a H height, on the one hand, the practical contact surface with oil smoke of the oil inlet cigarette channel of same diameter can be made
Product increases, and is conducive to occur to separate with the collision of oil smoke, on the other hand, can play the role of flowing into speed reduction to oil smoke,
The time of contact for improving oil smoke and flow-guiding screen 4, promote the intercepting efficiency of grease.Diversion division 12 is along the axial high of central axis X
Degree is L, and L >=10mm, flow-guiding screen 4 is H, 0.5L≤H≤2L along the axial height of central axis X.Each flow guide bar 41 is by radial direction
Outboard end is increasingly towards that first direction X1 is prominent to be extended deviously to radially inner side end, and whole frustum of a cone is consequently formed
Shape.
Referring to Fig. 6, projection of each flow guide bar 41 in the plane vertical with central axis X is arc-shaped, the circle of the projection
The bending direction of arc is identical and the bending direction of impeller blade with centrifugal blower is consistent.The bending angle of flow guide bar 41
Degree is θ (central angle of circular arc), it is preferred that 60 °≤θ≤120 °.Referring to Fig. 7, the section of flow guide bar 41 is aerofoil profile, using NACA
Symmetrical airfoil curve, aerofoil section can reduce flow separation phenomenon, reduce flow resistance.The chord length in 41 section of flow guide bar is Z,
The value range of Z is preferably 3mm~10mm.
Flow-guiding screen 4 is located at centrifugal blower inlet, and entrance is divided into muti-piece, not only acts as the effect of rectification, broken whirlpool, together
When also function to the effect of filtering oil smoke, 41 quantity of flow guide bar is more, and the effect for crossing filtering fume is better, but due to entrance incoming air area
Reduction, it is overstocked to will affect fan performance, should comprehensively consider.Preferably, the quantity of flow guide bar 41 is 20~50.It is curved to lead
Stream item 41 also prewhirls to inlet air flow effect, impact loss when reducing air-flow into curved impeller blade.
Claims (11)
1. a kind of collector for centrifugal blower, including baffle liner (1), the baffle liner (1) includes circular retainer plate
(11) and diversion division (12), the retainer plate (11) have central axis (X), form opposite first along central axis (X)
Direction (X1) and second direction (X2), oil smoke flow path along the second direction (X2), the diversion division (12) include by
The first diversion division (121) of retainer plate (11) radially inside to extend internally and be bent and protruded to first direction (X1), Yi Jiyou
The second diversion division (122) that the inside of first diversion division (121) extends along second direction (X2), it is characterised in that: described to lead
Stream circle (1) further includes the denoising device (2) being connected and fixed with retainer plate (11) or diversion division (12), and the denoising device (2) sets
The outside in the second diversion division (122) is set, the space between the denoising device (2) and diversion division (12) forms noise reduction cavity
(24), noise reduction hole (23) are offered on the noise reduction cavity (24) wall corresponding with denoising device (2).
2. the collector according to claim 1 for centrifugal blower, it is characterised in that: the denoising device (2) includes
It is spaced apart and arranged in first noise reduction unit (21) of the second diversion division (122) radial outside and is spaced with the first diversion division (121)
The second noise reduction unit (22) being arranged, on oil smoke flow path, second noise reduction unit (22) is located at the first diversion division (121)
Downstream, second noise reduction unit (22) is in circular ring shape and radially inner side and the second diversion division (122) are far from the first diversion division
(121) one end links into an integrated entity, and first noise reduction unit (21) is connected to radial outside and the edge of the second noise reduction unit (22)
First direction (X1) it is axially extending, the noise reduction cavity (24) be formed in the first diversion division (121), the second diversion division (122),
Between first noise reduction unit (21) and the second noise reduction unit (22), the noise reduction hole (23) is provided with the first noise reduction unit (21) and the second drop
It makes an uproar on portion (22).
3. the collector according to claim 2 for centrifugal blower, it is characterised in that: the first noise reduction unit (21) packet
Include the noise reducing plate (211) of two pieces or more arcs, noise reducing plate (211) arranged for interval, and each noise reducing plate in the circumferential
(211) end far from retainer plate (11) is connect with the radial outside of the second noise reduction unit (22), noise reducing plate (211) and the second noise reduction
Junction between portion (22) offers multiple waist-shaped holes (25) spaced apart in the circumferential, so that the noise reducing plate (211)
It can be bent with respect to the second noise reduction unit (22).
4. the collector according to claim 3 for centrifugal blower, it is characterised in that: adjacent two pieces of noise reducing plates (211)
Between the angle that is spaced be α, the value range of α is 5 °~15 °.
5. the collector according to claim 3 for centrifugal blower, it is characterised in that: set in the noise reduction cavity (24)
It is equipped with, sound-absorbing material made of sound-absorbing ring (3) compatible with noise reduction cavity (24) shape.
6. the collector according to any one of claims 1 to 5 for centrifugal blower, it is characterised in that: described second
The diameter that diversion division (122) connect one end with the first diversion division (121) is D1, and second diversion division (122) is led far from first
The diameter of stream portion (121) one end is D2, and the value range of above-mentioned diameter is 0.7≤D2/D1≤1.
7. the collector according to any one of claims 1 to 5 for centrifugal blower, it is characterised in that: the water conservancy diversion
It is provided on the inside of portion (12) flow-guiding screen (4), the flow-guiding screen (4) includes a plurality of flow guide bar radially outward radially arranged
(41) and for each flow guide bar (41) to be connected to integral fixed ring (42).
8. the collector according to claim 7 for centrifugal blower, it is characterised in that: the section of the flow guide bar (41)
For symmetrical airfoil, the chord length in flow guide bar (41) section is Z, and the value range of Z is 3mm~10mm.
9. the collector according to claim 7 for centrifugal blower, it is characterised in that: the flow-guiding screen (4) is whole to be in
Conical butt and (X1) bore is gradually reduced along a first direction.
10. the collector according to claim 9 for centrifugal blower, it is characterised in that: the diversion division (12) along
The axial height of central axis (X) be L, the flow-guiding screen (4) along central axis (X) axial height be H, 0.5L≤H≤
2L。
11. the collector according to claim 9 for centrifugal blower, it is characterised in that: each flow guide bar (41) is in
Projection in the vertical plane of mandrel line (X) is arc-shaped, and the bending direction of the projection of each flow guide bar (41) is identical, the water conservancy diversion
The bending angle of the projection of item (41) be θ, 60 °≤θ≤120 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920015837.1U CN209704924U (en) | 2019-01-04 | 2019-01-04 | A kind of collector for centrifugal blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920015837.1U CN209704924U (en) | 2019-01-04 | 2019-01-04 | A kind of collector for centrifugal blower |
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| Publication Number | Publication Date |
|---|---|
| CN209704924U true CN209704924U (en) | 2019-11-29 |
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ID=68638250
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920015837.1U Active CN209704924U (en) | 2019-01-04 | 2019-01-04 | A kind of collector for centrifugal blower |
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| CN (1) | CN209704924U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021211069A1 (en) * | 2020-04-15 | 2021-10-21 | Femas Metal San. Ve Tic. A.S. | A housing for the radial fan of a range hood |
-
2019
- 2019-01-04 CN CN201920015837.1U patent/CN209704924U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021211069A1 (en) * | 2020-04-15 | 2021-10-21 | Femas Metal San. Ve Tic. A.S. | A housing for the radial fan of a range hood |
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