CN208793317U - A kind of volute structure of centrifugal blower - Google Patents
A kind of volute structure of centrifugal blower Download PDFInfo
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- CN208793317U CN208793317U CN201820664518.9U CN201820664518U CN208793317U CN 208793317 U CN208793317 U CN 208793317U CN 201820664518 U CN201820664518 U CN 201820664518U CN 208793317 U CN208793317 U CN 208793317U
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- volute tongue
- volute
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Abstract
The utility model relates to a kind of volute structures of centrifugal blower, including volute tongue, the volute tongue has volute tongue inner wall, it is characterized by: the volute tongue has closed cavity, gas supply stream is offered on the volute tongue inner wall and enters the hole in cavity, is provided with the sound collector that can detect noise level in the cavity and can be played the acoustical generator of sound.The volute tongue of the utility model has closed cavity, in centrifugal blower use process, air-flow can be entered in cavity by the hole on volute tongue inner wall, the sound collector of cavity can acquire noise signal and be communicated to controller, controller calculates noise reduction audio signal according to the signal of acquisition and control acoustical generator plays corresponding noise-reducing accordingly, to play the role of active noise reduction, which has abolished the eddy current problem at volute tongue, to reduce fan noise, improve fan efficiency.
Description
Technical field
The utility model relates to range hood technical fields, refer specifically to a kind of volute structure of centrifugal blower.
Background technique
Domestic cooking fume remover uses multi-blade centrifugal fan, carries out air-breathing, exhaust.Blower is generally by spiral case, motor, impeller
Deng composition.Wherein tongue-shaped projection part is referred to as volute tongue in spiral case, and main function is to separate flowing gas, prevents gas in spiral case
Internal circulation flow.Due to gas pressure height, complex flow, the flow noise generated near volute tongue, rotational noise near volute tongue
It is the Main Noise Sources of centrifugal blower, reducing the noise near volute tongue can significantly reduce range hood noise.
Application publication number is a kind of Chinese patent application " volute of blower for range hood " (Shen of CN105526193A
Please number: CN201610111243.1) disclose a kind of structure comprising volute tongue, volute tongue include volute tongue inner wall, and volute tongue forms closing
Cavity, at least one longitudinal baffle is disposed with along the axis direction of spiral case in cavity, along the axis direction cloth of vertical spiral case
Multiple radial partitions are equipped with, the cavity is separated into multiple independent closed noise reduction cavitys by longitudinal baffle and radial partition,
Hole is offered in the corresponding volute tongue inner wall section of each noise reduction cavity.Cavity in volute tongue is separated into multiple independences by above structure
Closed areola, the hole thus opened up on areola and corresponding side wall forms Helmholtz resonator, according to Hai Muhuo
Hereby resonance principle, after sound transmission comes, close sound wave and resonator generate resonance with the resonator intrinsic frequency, are vibrating
In the process, the air column in cavity and cavity inner wall friction and sound energy consumption, to carry out sqouynd absorption lowering noise.
Above structure reduces fan noise by way of noise reduction cavity is arranged to a certain extent, still, due to snail
Space is smaller at tongue, and gas is difficult disposably to be discharged, and remaining gas is easy reflux and forms vortex, and fan efficiency is caused to drop
It is low, and vortex noise is generated, and then blower is caused still to there is biggish noise.
Utility model content
For the current state of the art, the technical problem to be solved by the utility model is to provide one kind to pass through active noise reduction
And vortex is abolished to reduce the volute structure of fan noise, the centrifugal blower for improving fan efficiency.
Technical solution adopted by the utility model to solve the above technical problems is as follows: a kind of volute structure of centrifugal blower,
Including volute tongue, the volute tongue has volute tongue inner wall, it is characterised in that: the volute tongue has closed cavity, the volute tongue inner wall
On offer gas supply stream and enter the hole in cavity, be provided with the sound collector that can detect noise level in the cavity and can broadcast
The acoustical generator of sound reproduction sound.
Preferably, the volute tongue two sides are respectively arranged with volute tongue side plate, are provided with back plate on the outside of the volute tongue, the back plate with
The volute tongue side plate and volute tongue outer wall enclose the cavity, the sound collector and acoustical generator towards back plate cloth jointly
It sets.The structure is conducive to preferably eliminate noise.
As an improvement, be provided with the baffle to extend internally along volute tongue outer wall in the cavity, the top of the baffle and corresponding
Volute tongue outer wall between be formed with long and narrow flow-guiding channel, the upper end of the flow-guiding channel is connected with the air outlet of spiral case, described
Diversion cavity is enclosed between the lower part and volute tongue outer wall of baffle, and gas supply stream is provided on the volute tongue bottom wall and enters opening in diversion cavity
Mouthful.Preferably, be formed as silencing cavity between the baffle and back plate, supplied gas is offered on the baffle and is disappeared from diversion cavity entrance
Through-hole in sound chamber, the sound collector and acoustical generator are set on baffle and are located in the silencing cavity.The structure can be effective
Gas backstreaming is reduced, eddy current problem is abolished.
It improves again, the baffle that can opening covered or open opening, the volute tongue is additionally provided in the diversion cavity
On be provided with can according to air force adjust baffle relative to opening open and close whether adjusting component.Using the structure, work as wind
It when measuring smaller, adjusts component and does not act on, conventional structure, that is, meet demand of volute tongue adjusts component distinguished and admirable when air quantity is larger
Impact is lower to drive baffle movement to the opening that will be open, and performance abolishes vortex and reduces gas backstreaming function.
Preferably, the adjusting component includes linking arm, pin shaft and elastic component, and the linking arm is set to the of baffle
One end is simultaneously connected on volute tongue side wall by pin shaft with being able to rotate, and the baffle is set to overthe openings and can be in wind with being able to rotate
Stream impact is lower to float the opening that will be open upwards, and the second end of the baffle is rotatably mounted end, and the elastic component makes to lead
Stream block remains the trend for covering opening.The coefficient of elasticity of elastic component can be specific according to wind pressure, flow of blower fan system etc.
Performance parameter setting, to keep the lower noise of blower whether adjusting the closing of opening according to air force.
For the ease of assembly, the elastic component is spring, and the first end of the spring and the upper surface of linking arm offset, should
The second end of spring offsets with the volute tongue inner wall above it.Preferably, it is formed on the volute tongue inner wall above the elastic component vertical
The plane that straight spring is axially arranged, the second end of the spring offset with the plane；The upper surface of the linking arm offers confession
Spring first end holding card slot therein.
Preferably, the baffle with a thickness of 1.5~2mm, the diameter of the through-hole is 2.3~3.2mm.
In the above embodiments, the spiral case further includes spiral case ring wall, and the volute tongue is connected to the first end of spiral case ring wall
On, the volute tongue inner wall includes the first side plate bending, the second side plate bending and the first planar section, and first side plate bending is close to centrifugation wind
The impeller arrangement of machine and the first guide face of lower surface composition centrifugal blower, first planar section are set to the air outlet side of spiral case
And inner surface constitutes the second guide face of centrifugal blower, second side plate bending be connected to the first side plate bending and the first planar section it
Between.
For the ease of connection, the spiral case further includes front shroud, back shroud, and the spiral case ring wall is connected to front shroud with after
Between cover board, the volute tongue top edge is connected with front shroud, back shroud top edge, the volute tongue lower edge and spiral case ring wall
First end margin is connected and passes through silica gel sealing.
Preferably, the baffle includes the second planar section and third side plate bending, and second planar section is close to the first plane
Section arrangement, the upper end of the third side plate bending is mutually connected with the lower end of the second planar section, and the third side plate bending is to the second cambered surface
Duan Fangxiang arches upward and lower end is mutually connected with the upper surface of the first side plate bending.It is formed between first planar section and the second planar section
The width of flow-guiding channel be gradually reduced from bottom to top.Diversion cavity and long and narrow flow-guiding channel is collectively formed substantially in above structure
Shape is 6 structure, so that playing the role of good water conservancy diversion breaks whirlpool.
Preferably, the lower surface of the baffle is configured to the first cambered surface to arch upward downwards, corresponding, the opening two sides
Wall is formed to the mating surface to match with the first cambered surface.The upper surface of the baffle is formed with the second arc to arch upward upwards
Face, the radian of second cambered surface are greater than the radian of the first cambered surface, and the round and smooth mistake in junction of first cambered surface and the second cambered surface
It crosses.Above structure can reduce baffle to distinguished and admirable resistance.
Compared with the prior art, the advantages of the utility model are: the volute tongue of the utility model has closed cavity, from
In heart blower use process, air-flow can be entered in cavity by the hole on volute tongue inner wall, and the sound collector of cavity, which can acquire, makes an uproar
Sound signal is simultaneously communicated to controller, and controller calculates noise reduction audio signal according to the signal of acquisition and control acoustical generator is broadcast accordingly
Corresponding noise-reducing is put, to play the role of active noise reduction, which has abolished the eddy current problem at volute tongue, to reduce wind
Machine noise improves fan efficiency.
Detailed description of the invention
Fig. 1 is the structural schematic diagram (being equipped with impeller) of the utility model；
Fig. 2 is the cross-sectional view of the utility model embodiment 1；
Fig. 3 is the structural schematic diagram of volute tongue in the utility model embodiment 1；
Fig. 4 is the assembling structure schematic diagram of baffle and linking arm, elastic component in the utility model embodiment 2；
Fig. 5 is the cross-sectional view of the utility model embodiment 2；
Fig. 6 is the cross-sectional view (not including baffle) of volute tongue in the utility model embodiment 2.
Specific embodiment
The utility model is described in further detail below in conjunction with figure embodiment.
Embodiment 1:
As shown in Figure 1, 2, 3, the volute structure of the centrifugal blower of the present embodiment include volute tongue 1, front shroud 2, back shroud 3 and
Spiral case ring wall 4, front shroud 2 and 3 time interval of back shroud arrange that spiral case ring wall 4 is connected between front shroud 2 and back shroud 3, snail
Tongue 1 is set in the first end of spiral case ring wall 4, a side wall of volute tongue 1 side wall and front shroud 2, rear cover opposite with spiral case ring wall 4
Plate 3 encloses air outlet 40 jointly.
The volute tongue 1 of the present embodiment has volute tongue inner wall 11, which includes the first side plate bending 111, the second cambered surface
Section 112 and the first planar section 113, impeller arrangement and lower surface composition centrifugal blower of first side plate bending 111 close to centrifugal blower
The first guide face, the first planar section 113 be set to spiral case 40 side of air outlet and inner surface constitute centrifugal blower the second water conservancy diversion
Face, the second side plate bending 112 are connected between the first side plate bending 111 and the first planar section 113.1 top edge of volute tongue of the present embodiment
It is connected with front shroud 2,3 top edge of back shroud by screw, 1 lower edge of volute tongue and the first end margin of spiral case ring wall 4 pass through
Screw connection is connected and passes through silica gel sealing.
The volute tongue 1 of the present embodiment has closed cavity 10, offers gas supply on the first planar section 113 of volute tongue inner wall 11
Stream enters the hole 110 in cavity 10, is provided with the sound collector 5 that can detect noise level in cavity 10 and can play sound
Acoustical generator 6 is additionally provided with corresponding controller on volute structure, and the controller and sound collector 5 and 6 electric signal of acoustical generator connect
It connects, the noise signal that sound collector 5 acquires is communicated to controller, and controller calculates required noise reduction according to the noise signal
Audio signal, and control acoustical generator 6 and play corresponding noise-reducing, to reach noise reduction effect.1 two sides of volute tongue of the present embodiment point
It is not provided with volute tongue side plate 12, back plate 17 is provided on the outside of volute tongue 1, which encloses jointly with volute tongue side plate 12 and volute tongue outer wall
Synthetic cavity 10, sound collector 5 and acoustical generator 6 are arranged towards back plate 17, are conducive to eliminate noise.
Embodiment 2:
As shown in Fig. 1,4,5,6, the present embodiment the difference from embodiment 1 is that: be provided in the cavity 10 of the present embodiment
The baffle 13 to extend internally along volute tongue outer wall, baffle 13 include the second planar section 131 and third side plate bending 132, the second planar section
131 arrange close to the first planar section 113, and the upper end of third side plate bending 132 is mutually connected with the lower end of the second planar section 131, third
Side plate bending 132 arches upward to 112 direction of the second side plate bending and lower end is mutually connected with the upper surface of the first side plate bending 112.Baffle 13
113 are formed with long and narrow flow-guiding channel 14 between second planar section 131 and the first planar section of volute tongue inner wall 11, and the water conservancy diversion is logical
The width in road 14 is gradually reduced from bottom to top.Diversion cavity 15, the first arc are enclosed between 10 inner wall of lower part and cavity of baffle 13
It is provided with the opening 1111 that gas supply stream enters in diversion cavity 15 in face section 111, is additionally provided with and opening 1111 can be hidden in diversion cavity 15
Lid or the baffle 100 for opening opening 1111.The lower surface of baffle 100 is configured to the first cambered surface 101 to arch upward downwards, right
It answers, 1111 two sidewalls of opening are formed to the mating surface 1112 to match with the first cambered surface 101.The upper surface of baffle 100
It is formed with the second cambered surface 102 to arch upward upwards, the radian of second cambered surface 102 is greater than the radian of the first cambered surface 101, and the first arc
The junction rounding off in face 101 and the second cambered surface 102, the structure can reduce baffle 100 to distinguished and admirable resistance.The present embodiment
Diversion cavity 15 and long and narrow flow-guiding channel 14 general shape is collectively formed and is 6 structure, so that playing good water conservancy diversion breaks whirlpool
Effect.Be formed as silencing cavity 170 between baffle 13 and back plate 17, supplied gas is offered on baffle 13 from diversion cavity 15 and enters noise reduction
Through-hole 130 in chamber 170, sound collector 5 and acoustical generator 6 are set on baffle 13 and are located in the silencing cavity 170, which can
Gas backstreaming is effectively reduced, eddy current problem is abolished.Baffle 13 with a thickness of 1.5~2mm, the diameter of through-hole 130 is 2.3~
3.2mm。
In the present embodiment, the baffle that can opening 1111 covered or open opening 1111 is provided in diversion cavity 15
100, the adjusting component that can be adjusted according to air force whether baffle 100 is opened and closed relative to opening 1111 is provided in volute tongue 1
16.Adjusting component 16 includes linking arm 161, pin shaft 162 and elastic component 163, and linking arm 161 is two and is connected to water conservancy diversion
The other end of the two sides of 100 first end of block, linking arm 161 is connected on volute tongue side plate 12 with being able to rotate by pin shaft 162, and even
Place is met to arrange close to the second side plate bending 112.Baffle 100 be able to rotate be set to opening 1111 top and can under distinguished and admirable impact to
Upper to float 1111 openings that be open, the second end of baffle 100 is rotatably mounted end, and elastic component 163 makes baffle 100 begin
The trend for covering opening 1111 is kept eventually.The coefficient of elasticity of elastic component 163 can be specific according to wind pressure, flow of blower fan system etc.
Performance parameter setting, to keep the lower noise of blower whether adjusting the closing of opening according to air force.The present embodiment
Elastic component 163 is spring, and the first end of the spring and the upper surface of linking arm 161 offset, the second end of the spring and its top
Volute tongue inner wall offset.The plane 114 that uprighting spring is axially arranged, spring are formed on the volute tongue inner wall of 163 top of elastic component
Second end offset with the plane 114.The upper surface of linking arm 161 is offered for spring first end holding card slot therein
1611。
Using the volute structure of the present embodiment, when compressor flow is smaller, noise is smaller, and baffle 100 will be open 1111
It closes；When compressor flow is larger, reflux of the gas at volute tongue 1 increases, and gas shock baffle 100 overcomes elastic component 163
Elastic force floats upwards, and opening 1111 is opened, at this point, portion gas enters in diversion cavity 15 through opening 1111, into diversion cavity
Gas part in 15 is directly over after long and narrow flow-guiding channel 14 accelerates and is discharged from air outlet 40, and another part passes through baffle 13
On through-hole 130 enter the first cavity 170, at this point, sound collector 5 acquire noise signal be communicated to controller, controller
Required noise reduction audio signal is calculated according to the noise signal, and controls acoustical generator 6 and plays corresponding noise-reducing, to reach
Noise reduction effect, which, which not only passes through active noise reduction and disappear, reduces noise, also achieves the secondary discharge of reflux gas, reduces
Eddy current problem has been abolished in gas backstreaming, to reduce fan noise, improve fan efficiency.
Claims (15)
1. a kind of volute structure of centrifugal blower, including volute tongue (1), the volute tongue (1) has volute tongue inner wall (11), and feature exists
In: the volute tongue (1) has closed cavity (10), and gas supply stream is offered on the volute tongue inner wall (11) and is entered in cavity (10)
Hole (110), be provided with the sound collector (5) that can detect noise level and the sounding that sound can be played in the cavity (10)
Device (6).
2. the volute structure of centrifugal blower according to claim 1, it is characterised in that: volute tongue (1) two sides are set respectively
Be equipped with volute tongue side plate (12), be provided with back plate (17) on the outside of the volute tongue (1), the back plate (17) and the volute tongue side plate (12) and
Volute tongue outer wall encloses the cavity (10), the sound collector (5) and acoustical generator (6) jointly and arranges towards back plate (7).
3. the volute structure of centrifugal blower according to claim 2, it is characterised in that: be provided with edge in the cavity (10)
The baffle (13) that volute tongue outer wall extends internally, is formed with long and narrow lead between the top of the baffle (13) and corresponding volute tongue outer wall
Circulation road (14), the upper end of the flow-guiding channel (14) are connected with the air outlet (40) of spiral case, the lower part of the baffle (13) with
It is enclosed between volute tongue outer wall diversion cavity (15), gas supply stream is provided on volute tongue (1) bottom wall and enters opening in diversion cavity (15)
Mouth (1111).
4. the volute structure of centrifugal blower according to claim 3, it is characterised in that: the baffle (13) and back plate (17)
Between be formed as silencing cavity (170), offered on the baffle (13) supplied gas from diversion cavity (15) enter silencing cavity (170) in
Through-hole (130), the sound collector (5) and acoustical generator (6) are set on baffle (13) and are located at the silencing cavity (170)
In.
5. the volute structure of centrifugal blower according to claim 3, it is characterised in that: also set up in the diversion cavity (15)
There is the baffle (100) for (1111) opening that opening (1111) can be covered or will be open, being provided on the volute tongue (1) can basis
Air force adjusts the adjusting component (16) whether baffle (100) are opened and closed relative to opening (1111).
6. the volute structure of centrifugal blower according to claim 5, it is characterised in that: the adjusting component (16) includes
Linking arm (161), pin shaft (162) and elastic component (163), the linking arm (161) are set to the first end of baffle (100) and lead to
It crosses pin shaft (162) to be connected to being able to rotate on volute tongue side wall, the baffle (100) is set to above opening (1111) with being able to rotate
And (1111) opening that will be open can be floated upwards under distinguished and admirable impact, the second end of the baffle (100) be rotation certainly
By holding, the elastic component (163) makes baffle (100) remain the trend for covering opening (1111).
7. the volute structure of centrifugal blower according to claim 6, it is characterised in that: the elastic component (163) is bullet
Spring, the first end of the spring and the upper surface of linking arm (161) offset, the second end of the spring and the volute tongue inner wall phase above it
It supports.
8. the volute structure of centrifugal blower according to claim 7, it is characterised in that: above the elastic component (163)
The plane (114) that uprighting spring is axially arranged, the second end of the spring and plane (114) phase are formed on volute tongue inner wall
It supports；The upper surface of the linking arm (161) is offered for spring first end holding card slot therein (1611).
9. the volute structure of centrifugal blower according to claim 4, it is characterised in that: the baffle (13) with a thickness of
1.5~2mm, the diameter of the through-hole (130) are 2.3~3.2mm.
10. the volute structure of centrifugal blower according to claim 3, it is characterised in that: the spiral case knot of the centrifugal blower
Structure further includes spiral case ring wall (4), and the volute tongue (1) is connected in the first end of spiral case ring wall (4), volute tongue inner wall (11) packet
Include the first side plate bending (111), the second side plate bending (112) and the first planar section (113), first side plate bending (111) close to from
The impeller arrangement of heart blower and the first guide face of lower surface composition centrifugal blower, first planar section (113) are set to spiral case
Air outlet (40) side and inner surface constitute the second guide face of centrifugal blower, second side plate bending (112) is connected to first
Between side plate bending (111) and the first planar section (113).
11. the volute structure of centrifugal blower according to claim 10, it is characterised in that: the spiral case knot of the centrifugal blower
Structure further includes front shroud (2), back shroud (3), and the spiral case ring wall (4) is connected between front shroud (2) and back shroud (3), institute
It states volute tongue (1) top edge to be connected with front shroud (2), back shroud (3) top edge, volute tongue (1) lower edge and spiral case ring wall
(4) the first end margin is connected and passes through silica gel sealing.
12. the volute structure of centrifugal blower according to claim 10, it is characterised in that: the baffle (13) includes second
Planar section (131) and third side plate bending (132), second planar section (131) is arranged close to the first planar section (113), described
The upper end of third side plate bending (132) is mutually connected with the lower end of the second planar section (131), and the third side plate bending (132) is to second
Side plate bending (112) direction is arched upward and lower end is mutually connected with the upper surface of the first side plate bending (111).
13. the volute structure of centrifugal blower according to claim 12, it is characterised in that: first planar section (113)
The width of the flow-guiding channel (14) formed between the second planar section (131) is gradually reduced from bottom to top.
14. the volute structure of centrifugal blower according to claim 5, it is characterised in that: the following table of the baffle (100)
Face is configured to the first cambered surface (101) to arch upward downwards, corresponding, and described opening (1111) two sidewalls are formed to and the first cambered surface
(101) mating surface (1112) to match.
15. the volute structure of centrifugal blower according to claim 14, it is characterised in that: the baffle (100) it is upper
Surface is formed with the second cambered surface (102) to arch upward upwards, and the radian of second cambered surface (102) is greater than the arc of the first cambered surface (101)
Degree, and the junction rounding off of first cambered surface (101) and the second cambered surface (102).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820664518.9U CN208793317U (en) | 2018-05-04 | 2018-05-04 | A kind of volute structure of centrifugal blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820664518.9U CN208793317U (en) | 2018-05-04 | 2018-05-04 | A kind of volute structure of centrifugal blower |
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| Publication Number | Publication Date |
|---|---|
| CN208793317U true CN208793317U (en) | 2019-04-26 |
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ID=66199778
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| CN201820664518.9U Active CN208793317U (en) | 2018-05-04 | 2018-05-04 | A kind of volute structure of centrifugal blower |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110259725A (en) * | 2019-05-30 | 2019-09-20 | 宁波方太厨具有限公司 | It is a kind of for the spiral case of centrifugal blower and the method for noise reduction control of the spiral case |
| CN110439860A (en) * | 2018-05-04 | 2019-11-12 | 宁波方太厨具有限公司 | A kind of volute structure of centrifugal blower |
-
2018
- 2018-05-04 CN CN201820664518.9U patent/CN208793317U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110439860A (en) * | 2018-05-04 | 2019-11-12 | 宁波方太厨具有限公司 | A kind of volute structure of centrifugal blower |
| CN110259725A (en) * | 2019-05-30 | 2019-09-20 | 宁波方太厨具有限公司 | It is a kind of for the spiral case of centrifugal blower and the method for noise reduction control of the spiral case |
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