CN207212704U - A kind of low noise centrifugal fan, air cleaning unit for being provided with noise-reducing acoustic liner - Google Patents
A kind of low noise centrifugal fan, air cleaning unit for being provided with noise-reducing acoustic liner Download PDFInfo
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- CN207212704U CN207212704U CN201720828081.3U CN201720828081U CN207212704U CN 207212704 U CN207212704 U CN 207212704U CN 201720828081 U CN201720828081 U CN 201720828081U CN 207212704 U CN207212704 U CN 207212704U
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Abstract
The utility model discloses a kind of low noise centrifugal fan for being provided with noise-reducing acoustic liner, including：Impeller, spiral case and motor, the impeller and the motor are installed in the spiral case, and the motor is connected with the impeller, to drive the impeller to rotate, it is characterised in that the spiral case also includes：Perforated plate inner spiral casing and outer spiral casing, the perforated plate inner spiral casing is installed on inside the outer spiral casing, and an accommodating cavity is formed, silencing cotton is filled with the accommodating cavity, at least laying is drawn covered with one layer of Kev as noise-reducing acoustic liner in the outer surface of the perforated plate inner spiral casing.Low noise centrifugal fan in the utility model, not only acted on preferable sound insulation, while also there is higher sound absorption, so as to significantly reduce the noise of centrifugal fan.Compared with common centrifugal fan, the noise when low noise centrifugal fan in the utility model is run is much smaller than other centrifugal fans.
Description
Technical field
It the utility model is related to field of fluid machinery, air purification field, more particularly to a kind of noise-reducing acoustic liner that is provided with
Low noise centrifugal fan, it can be applied in the ventilation unit of air purifier, VMC.
Background technology
At present, the discharge capacity of the fast development of economic society, vehicle exhaust and industrial waste gas is increasing, thus caused
Haze is increasingly becoming a kind of factor for having a strong impact on health of people.In order to reduce influence of the haze to people, air purifier and
VMC starts indispensable as the life of contemporary family as TV.The general principle of air purifier and VMC
All it is to suck indoor or outdoor air in one machine with filtering function, and filtered air is discharged into room
It is interior, so as to the dust especially PM2.5 content being greatly reduced in air.Wherein, ventilation blower is to realize to suck gas
Air purifier or VMC, and the critical component discharged.
Ventilation blower in the market mainly has：Two kinds of centrifugal fan and axial fan.
Wherein, centrifugal fan be it is a kind of rotated by blower interior impeller, the air near impeller is caused during work
Also rotate with, thus produce centrifugal motion.And under the barrier effect of volute of blower, centrifugal motion can be converted into blower fan
Thus pressure simultaneously produces certain air mass flow.Compared with axial fan, centrifugal fan has structure installation simply,
The advantages that ventilation is greatly and blast is high, so as to be widely used in air purifier and VMC.But centrifugal fan
But have one it is obvious the shortcomings that, i.e., work noise is big.The lives of this noise on human, work etc. have the shadow that can not be ignored
Ring, such as it can reduce people's sleep quality, strong noise even makes one to fall asleep.Therefore, country in 2015 releases
GB/18801-2015《Air purifier》National standard, strict limitation is carried out with this noise to air purifier.
The Main Noise Sources of centrifugal blower include：Aerodynamic noise, electromagnetic noise and mechanical noise.
Wherein, aerodynamic noise plays a leading role to the size of fan noise.In general, reduce the major measure bag of noise
Include noise elimination, sound absorption and sound insulation.It is exactly strength of sound source wherein to eliminate the noise, and sound absorption is by setting some energy dissipatings in propagation process of sound wave
Material falls the energy dissipation entrained by sound wave, and sound insulation is the propagation by setting certain interface to completely cut off sound.It is so right
For centrifugal fan, because its primary structure includes：Impeller, spiral case and motor, and the rotation of wherein impeller is main
Noise source.
For general ventilation blower, due to the presence of shell, the propagation of sound has been obstructed to a certain extent, but by
Rigid spiral case is generally in this spiral case, therefore sound wave does not dissipate completely inside it, after the reflection of certain number
From scroll outer can be passed to from inside.In the prior art, in order to reduce the intensity of air-blower noise, how volute of blower is caused not
Only there is certain sound insulation function, while reflection of the sound wave in spiral case can also be reduced, so as to significantly reduce draught fan impeller production
Raw aerodynamic noise is that those skilled in the art have the problem of to be solved.
Utility model content
The technical problems to be solved in the utility model is, a kind of not only to have preferable sound insulation effect, at the same also have compared with
High sound absorption, so as to significantly reduce the low noise for the being provided with noise-reducing acoustic liner centrifugation of the noise of centrifugal fan
Formula ventilation blower.
Solves above-mentioned technical problem, the utility model provides a kind of centrifugal ventilation of the low noise for being provided with noise-reducing acoustic liner
Machine, including：Impeller, spiral case and motor, the impeller and the motor are installed in the spiral case, the motor and the impeller
It is connected, to drive the impeller to rotate, the spiral case also includes：Perforated plate inner spiral casing and outer spiral casing,
The perforated plate inner spiral casing is installed on inside the outer spiral casing, and forms an accommodating cavity,
Silencing cotton is filled with the accommodating cavity,
At least laying is drawn in the outer surface of the perforated plate inner spiral casing covered with one layer of Kev as noise-reducing acoustic liner.
Further, it is process in the perforated plate inner spiral casing by perforated plate, the thickness of the perforated plate is 0.8-2 millis
Rice, a diameter of 0.5-3 millimeters in each hole, punching rate 20%.
Further, inner spiral casing air admission hole and inner spiral casing venthole are additionally provided with the perforated plate inner spiral casing, it is described
For inner spiral casing air admission hole to be round, the inner spiral casing venthole is rectangle, respectively sucking and discharge air.
Further, the outer spiral casing size is more than the perforated plate inner spiral casing, and the outer spiral casing is process by iron plate,
Outer spiral casing air admission hole, outer spiral casing venthole and outer spiral casing mounting hole, the outer spiral casing air admission hole are provided with the outer spiral casing
For circle, outer spiral casing venthole is rectangle, and respectively to cause blower fan to suck and discharge air, the outer spiral casing mounting hole is used
To fix the low noise centrifugal fan.
Further, the motor is installed in the impeller by a fixed part,
The motor includes：Motor shaft, motor axle key and motor case, the fixed part include：Electric machine support, support
Outer spiral casing mounting hole and carriage motor mounting hole,
The motor axle key to prevent the impeller and the motor from rotating against,
The motor case is fixed on the electric machine support by carriage motor mounting hole, and the electric machine support leads to
The support outer spiral casing mounting hole is crossed to be fixed on the outer spiral casing.
Further, the noise elimination cotton uses density in 48Kg/m3 glass fibre.
Further, the impeller includes：Multiple blades, wheel disc and motor drive installation hole, the motor drive installation
Hole is arranged on the wheel disc, and multiple blades are arranged between the wheel disc.
Further, also include in device：The one ring-type wind loop for joining end to end machine-shaping by curved surface,
The wind loop is located at outer spiral casing air inlet position, to air loss caused by reducing the impeller, reduces simultaneously
Noise caused by the impeller is by the inner spiral casing air admission hole and the outer spiral casing air admission hole to external radiation.
Based on above-mentioned, the utility model additionally provides a kind of air cleaning unit, including described low noise is centrifugal logical
Blower fan.
Further, the air cleaning unit includes：Air purifier and/or VMC.
The beneficial effects of the utility model：
The low noise centrifugal fan for being provided with noise-reducing acoustic liner in the utility model, because the spiral case also includes：
Perforated plate inner spiral casing and outer spiral casing, the perforated plate inner spiral casing are installed on inside the outer spiral casing, and form an accommodating cavity,
Silencing cotton is filled with the accommodating cavity, at least noise reducing is used as covered with one layer in the outer surface of the perforated plate inner spiral casing
The Kev of lining draws laying.Sound lining formula spiral case in the utility model by inside and outside two layers of spiral case and is filled between two layers of spiral case
Silencing cotton and Kev draw laying composition.Wherein, two layers of spiral case is respectively that the inner spiral casing that perforated plate is process adds with closing iron plate
The outer spiral casing that work forms, and Kev drawing laying is covered in the outer surface of perforated plate inner spiral casing, the sky formed between two layers of spiral case
Intracavitary is filled with silencing cotton.
Further, the effect of perforated plate inner spiral casing is on the one hand can to guide the air-flow of blower interior, by internal gas flow
Centrifugal motion be converted into stream pressure.On the other hand between noise caused by impeller being passed into interior outer spiral casing, and noise elimination is passed through
Cotton dissipates sound wave.Kev draws the effect of laying to be to maintain while sound wave can pass through perforated plate inner spiral casing and does not lose blower fan
Pressure, so as to not influence the original aeroperformance of blower fan.The effect of outer spiral casing is to stop that sound wave appears blower fan.This sound serves as a contrast formula snail
Shell is compared than common spiral case, is not only acted on preferable sound insulation, while also has higher sound absorption, so as to big
Amplitude reduces the noise of centrifugal fan.
Brief description of the drawings
Fig. 1 is the overall assembling oblique view for the low noise centrifugal fan that noise-reducing acoustic liner is provided with the utility model；
Fig. 2 is overall assembling transverse sectional view；
Fig. 3 is overall assembling axial sectional view；
Fig. 4 is impeller oblique view in Fig. 1；
Fig. 5 is impeller transverse sectional view；
Fig. 6 is impeller axial sectional view；
Fig. 7 is Fig. 1 middle punch plate inner spiral casing oblique views；
Fig. 8 is outer spiral casing oblique view；
Fig. 9 is wind loop oblique view in Fig. 1；
Figure 10 is wind loop sectional view；
Figure 11 is motor schematic diagram；
Figure 12 is electric machine support schematic diagram；
Figure 13 is the microcosmic Electron microscope schematic diagram of silencing cotton；
Figure 14 is that Kev draws laying schematic diagram；
Wherein, 1, impeller, 2, blade, 3, wheel disc, 4, motor drive installation hole, 5, perforated plate inner spiral casing, 6, inner spiral casing enters
Stomata, 7, inner casing venthole, 8, outer spiral casing, 9, outer spiral casing air admission hole, 10, outer spiral casing venthole, 11, outer spiral casing mounting hole,
12nd, wind loop, 13, motor, 14, motor shaft, 15, motor axle key, 16, motor case, 17, electric machine support, 18, support outer spiral casing
Mounting hole, 19, carriage motor mounting hole, 20, silencing cotton, 21, Kev draw laying.
Embodiment
The principle of the disclosure is described referring now to some example embodiments.It is appreciated that these embodiments are merely for saying
It is bright and help it will be understood by those skilled in the art that with the purpose of the embodiment disclosure and describe, rather than suggest the model to the disclosure
Any restrictions enclosed.Content of this disclosure described here can in a manner of described below outside various modes implement.
As described herein, term " comprising " and its various variants are construed as open-ended term, it means that
" including but is not limited to ".Term "based" is construed as " being based at least partially on ".Term " one embodiment " can be by
It is interpreted as " at least one embodiment ".Term " another embodiment " is construed as " at least one other embodiment ".
Fig. 1-Fig. 3 is refer to, wherein, Fig. 1 is the centrifugal ventilation of low noise that noise-reducing acoustic liner is provided with the utility model
The overall assembling oblique view of machine；Fig. 2 is overall assembling transverse sectional view；Fig. 3 is overall assembling axial sectional view.In the present embodiment
The low noise centrifugal fan for being provided with noise-reducing acoustic liner include：Impeller 1, spiral case and motor 13, the impeller 1 and the electricity
Machine 13 is installed in the spiral case, and the motor 13 is connected with the impeller 1, to drive the impeller 1 to rotate, the spiral case
Also include：Perforated plate inner spiral casing 5 and outer spiral casing 8, the perforated plate inner spiral casing 5 are installed on inside the outer spiral casing 8, and form one
Accommodating cavity, is filled with silencing cotton 20 in the accommodating cavity, the outer surface of the perforated plate inner spiral casing 5 at least covered with
One layer of Kev as noise-reducing acoustic liner draws laying 21.This sound lining formula spiral case by inside and outside two layers of spiral case and is filled in two layers of spiral case
Between silencing cotton and Kev draw laying composition.Wherein two layers of spiral case is respectively the inner spiral casing that perforated plate is process and closing iron
The outer spiral casing that plate is process, and Kev draws laying to be covered in the outer surface of perforated plate inner spiral casing, is formed between two layers of spiral case
Cavity in filled with silencing cotton.The effect of perforated plate inner spiral casing is on the one hand can to guide the air-flow of blower interior, by inside
The centrifugal motion of air-flow is converted into stream pressure.On the other hand between noise caused by impeller being passed into interior outer spiral casing, and pass through
Noise elimination cotton dissipates sound wave.Kev draws the effect of laying to be to maintain while sound wave can pass through perforated plate inner spiral casing and not lost
Blower pressure, so as to not influence the original aeroperformance of blower fan.The effect of outer spiral casing is to stop that sound wave appears blower fan.This sound lining
Formula spiral case is compared than common spiral case, is not only acted on preferable sound insulation, while also has higher sound absorption, so as to
Significantly to reduce the noise of centrifugal fan.
Operation principle：
Specifically, quickly rotated under impeller 1 drives in motor 13, and the air near impeller 1 also revolves therewith
Turn, produce certain flow and pressure under the action of the centrifugal, its airflow direction is as shown in Figure 1.Due to being produced in the rotary course of impeller 1
A large amount of through holes that raw aerodynamic noise can be passed through on perforated plate inner spiral casing 5 enter between perforated plate inner spiral casing 5 and outer spiral casing 8
Cavity, in the presence of noise elimination cotton, energy entrained by sound wave is by fast dissipation, therefore, can great noise reduction noise.
As preferred in the present embodiment, Fig. 4-Fig. 6 is refer to, wherein, Fig. 4 is impeller oblique view in Fig. 1；Fig. 5 is leaf
Take turns transverse sectional view；Fig. 6 is impeller axial sectional view.The impeller 1 includes：Multiple blades 2, wheel disc 3 and motor drive installation
Hole 4, the motor drive installation hole 4 are arranged on the wheel disc 3, and multiple blades 2 are arranged between the wheel disc 3.One
As multiple blades can be installed on an impeller.
As preferred in the present embodiment, refer to Fig. 7 is Fig. 1 middle punch plate inner spiral casing oblique views；In the perforated plate
Inner spiral casing 5 is process by perforated plate, and the thickness of the perforated plate is 0.8-2 millimeters, a diameter of 0.5-3 millimeters in each hole,
Preferably, punching rate 20%.In certain embodiments, it is additionally provided with inner spiral casing air admission hole 6 on the perforated plate inner spiral casing 5
With inner spiral casing venthole 7, for the inner spiral casing air admission hole 6 to be round, the inner spiral casing venthole 7 is rectangle, respectively inhaling
Enter and discharge air.Perforated plate inner spiral casing 5 is process by perforated plate, wherein, perforation plate thickness is 0.8-2 millimeters, hole it is straight
Footpath is 0.5-3 millimeters, and punching rate (the porose area of institute is than spiral case area) is 20% or so.It is provided with perforated plate inner spiral casing
Inner spiral casing air admission hole and inner spiral casing venthole.Wherein, inner spiral casing air admission hole is round that inner spiral casing venthole is rectangle, respectively
For sucking and discharging air.In order to ensure noise reduction, it is necessary to ensure that the cavity between perforated plate inner spiral casing and outer spiral casing is complete
Fill up silencing cotton entirely.
As preferred in the present embodiment, refer to Fig. 8 is outer spiral casing oblique view.The size of outer spiral casing 8 is more than described
Perforated plate inner spiral casing 5, the outer spiral casing 8 are process by iron plate, and outer spiral casing air admission hole 9, outer is provided with the outer spiral casing 8
Spiral case venthole 10 and outer spiral casing mounting hole 11, the outer spiral casing air admission hole 9 are circle, and outer spiral casing venthole 10 is rectangle,
Respectively to cause blower fan to suck and discharge air, the outer spiral casing mounting hole 11 is fixing the centrifugal ventilation of the low noise
Machine.Outer spiral casing is process by common iron plate, and its basic size is more than perforated plate inner spiral casing.Outer spiral casing is provided with outer spiral casing
Air admission hole, outer spiral casing venthole and outer spiral casing mounting hole.Wherein, outer spiral casing air admission hole is circle, and outer spiral casing venthole is rectangular
Shape, equally it is to be used to blower fan to suck and discharge air.The effect of outer spiral casing mounting hole is to be used to fix blower fan.
As preferred in the present embodiment, Fig. 9-Figure 10 is refer to, wherein, Fig. 9 is wind loop oblique view in Fig. 1；Figure 10
It is wind loop sectional view.Device also includes：The one ring-type wind loop 12 for joining end to end machine-shaping by curved surface, the wind loop
12 at outer spiral casing air admission hole 9, to reduce air loss caused by the impeller, while reduce and are made an uproar caused by the impeller
Sound is by the inner spiral casing air admission hole and the outer spiral casing air admission hole to external radiation.Wind loop is a kind of as shown in Figure 9 and Figure 10
The annular element formed with Machining of Curved Surface, its function are to pass through inner spiral casing air admission hole to reduce air loss while reduce noise
With outer spiral casing air admission hole to external radiation.
As preferred in the present embodiment, Figure 11-Figure 12 is refer to, wherein, Figure 11 is motor schematic diagram；Figure 12 is motor
Support schematic diagram.The motor is installed in the impeller by a fixed part, and the motor includes：Motor shaft 14, motor shaft
Key 15 and motor case 16, the fixed part include：Electric machine support 17, support outer spiral casing mounting hole 18 and carriage motor peace
Hole 19 is filled, the motor axle key 15 is to prevent the impeller 1 and the motor 13 from rotating against, the motor case
16 are fixed on the electric machine support 17 by carriage motor mounting hole 19, and the electric machine support 17 by the support outside
Spiral case mounting hole 18 is fixed on the outer spiral casing.Motor is as shown in figure 11, and motor axle key is provided with its motor shaft.Motor
Support is as shown in figure 12, is being provided with support outer spiral casing mounting hole and carriage motor mounting hole.
As preferred in the present embodiment, the noise elimination cotton 20 is using density in 48Kg/m3Glass fibre.Silencing cotton 20
Microstructure it is as shown in figure 13, be a kind of by single or web-like/sheet that a variety of different fibers are process through kinds of processes
Material.It is pointed out that glass fibre has anti-aging price low etc., advantage is widely adopted, and in density 48Kg/m3
The soundproof effect of noise elimination cotton is best.Therefore, noise elimination cotton is glass fibre of the density in 48Kg/m3 used by the utility model.
In certain embodiments, above-mentioned Kev draws laying 21 as shown in figure 14, is a kind of braiding formed by fibrage
Layer, its raw material is PPTA, and thickness is generally less than 1 millimeter.
Fig. 1-Figure 12 is refer to, outer spiral casing 8 is located at the outermost of blower fan, whole blower fan played a supporting role in protection, together
When due to being process using common closing iron plate, can also play and stop noise to external radiation.Preferably, outer spiral casing 8 passes through
Outer spiral casing mounting hole 11 is fixed on air purifier or VMC.In certain embodiments, perforated plate inner spiral casing 5 passes through
The baffle plate of the end of inner spiral casing venthole 6 and the baffle plate of the end of outer spiral casing venthole 11 weld together, so as to realize in perforated plate
Spiral case and outer spiral casing are connected.It is pointed out that, it is necessary to perforate first before perforated plate inner spiral casing and outer spiral casing assembling
The outer surface of plate inner spiral casing covers Kev and draws laying 21.Because Kev draws the thickness of laying 21 smaller, and it is more soft, easily
Shaping, therefore can be pasted using common glue (such as 302 glue).It is preferably, it is necessary to simultaneously populated in outer spiral casing
Silencing cotton.In order to ensure noise reduction, it is necessary to ensure that the cavity between perforated plate inner spiral casing and outer spiral casing is fully filled with silencing cotton.
Impeller 1 is arranged on motor by the drive installation hole of motor 13, can be realized under the drive of motor 13 and be revolved at a high speed
Turn.The effect of motor axle key is to prevent impeller and motor from rotating against.Motor case passes through carriage motor mounting hole
It is fixed on electric machine support, and electric machine support is fixed on outer spiral casing by support outer spiral casing mounting hole.On erection sequence,
, it is necessary to which the wind loop of the left and right sides is welded on outer spiral casing first before electric machine support and outer spiral casing fixation.Pacify more than
Dress mode realizes the fixation of all parts.When impeller quickly rotates under motor driven, and the air near impeller
Rotate with, produce certain flow and pressure under the action of the centrifugal, its airflow direction is as shown in Figure 1.Because impeller rotates through
A large amount of through holes that caused aerodynamic noise can be passed through on perforated plate inner spiral casing in journey enter perforated plate inner spiral casing and outer spiral casing it
Between cavity, in the presence of noise elimination cotton, energy entrained by sound wave is by fast dissipation, therefore, can great noise reduction noise.
A kind of air cleaning unit, including described low noise centrifugal fan are additionally provided in the utility model, should
Air cleaning unit includes：Air purifier and/or VMC, the low noise for being provided with noise-reducing acoustic liner in the present embodiment from
Core type ventilation blower includes：Impeller 1, spiral case and motor 13, the impeller 1 and the motor 13 are installed in the spiral case, described
Motor 13 is connected with the impeller 1, and to drive the impeller 1 to rotate, the spiral case also includes：Perforated plate inner spiral casing 5 and outer
Spiral case 8, the perforated plate inner spiral casing 5 are installed on inside the outer spiral casing 8, and form an accommodating cavity, in the accommodating cavity
It is interior to be filled with silencing cotton 20, in the outer surface of the perforated plate inner spiral casing 5 at least covered with one layer of Kev as noise-reducing acoustic liner
Laying 21 is drawn, outer spiral casing 8 is fixed on air purifier or VMC by outer spiral casing mounting hole 11.Low noise is centrifugal
The impeller 1 of ventilation blower by noise-reducing acoustic liner formula spiral case wrap up, the sound serve as a contrast formula spiral case by perforated plate inner spiral casing 5, Kev draw laying 21,
Silencing cotton 20 and outer spiral casing 8 form.Perforated plate inner spiral casing 5 is located in outer spiral casing 8, and the cavity formed between the two passes through silencing cotton
20 fillings, and laying 21 is drawn in the outer surface of perforated plate inner spiral casing 5 covering Kev, noise-reducing acoustic liner is formed with this；Preferably, it is above-mentioned
The aperture of perforated plate used by perforated plate inner spiral casing is 0.5-2 millimeters, and punching rate is 20%.Preferably, above-mentioned noise elimination
Cotton uses density in 48Kg/m3 glass fibre.
As preferred in the present embodiment, Fig. 4-Fig. 6 is refer to, wherein, Fig. 4 is impeller oblique view in Fig. 1；Fig. 5 is leaf
Take turns transverse sectional view；Fig. 6 is impeller axial sectional view.The impeller 1 includes：Multiple blades 2, wheel disc 3 and motor drive installation
Hole 4, the motor drive installation hole 4 are arranged on the wheel disc 3, and multiple blades 2 are arranged between the wheel disc 3.One
As multiple blades can be installed on an impeller.
As preferred in the present embodiment, refer to Fig. 7 is Fig. 1 middle punch plate inner spiral casing oblique views；In the perforated plate
Inner spiral casing 5 is process by perforated plate, and the thickness of the perforated plate is 0.8-2 millimeters, a diameter of 0.5-3 millimeters in each hole,
Preferably, punching rate 20%.In certain embodiments, it is additionally provided with inner spiral casing air admission hole 6 on the perforated plate inner spiral casing 5
With inner spiral casing venthole 7, for the inner spiral casing air admission hole 6 to be round, the inner spiral casing venthole 7 is rectangle, respectively inhaling
Enter and discharge air.Perforated plate inner spiral casing 5 is process by perforated plate, wherein, perforation plate thickness is 0.8-2 millimeters, hole it is straight
Footpath is 0.5-3 millimeters, and punching rate (the porose area of institute is than spiral case area) is 20% or so.It is provided with perforated plate inner spiral casing
Inner spiral casing air admission hole and inner spiral casing venthole.Wherein, inner spiral casing air admission hole is round that inner spiral casing venthole is rectangle, respectively
For sucking and discharging air.In order to ensure noise reduction, it is necessary to ensure that the cavity between perforated plate inner spiral casing and outer spiral casing is complete
Fill up silencing cotton entirely.
As preferred in the present embodiment, refer to Fig. 8 is outer spiral casing oblique view.The size of outer spiral casing 8 is more than described
Perforated plate inner spiral casing 5, the outer spiral casing 8 are process by iron plate, and outer spiral casing air admission hole 9, outer is provided with the outer spiral casing 8
Spiral case venthole 10 and outer spiral casing mounting hole 11, the outer spiral casing air admission hole 9 are circle, and outer spiral casing venthole 10 is rectangle,
Respectively to cause blower fan to suck and discharge air, the outer spiral casing mounting hole 11 is fixing the centrifugal ventilation of the low noise
Machine.Outer spiral casing is process by common iron plate, and its basic size is more than perforated plate inner spiral casing.Outer spiral casing is provided with outer spiral casing
Air admission hole, outer spiral casing venthole and outer spiral casing mounting hole.Wherein, outer spiral casing air admission hole is circle, and outer spiral casing venthole is rectangular
Shape, equally it is to be used to blower fan to suck and discharge air.The effect of outer spiral casing mounting hole is to be used to fix blower fan.
As preferred in the present embodiment, Fig. 9-Figure 10 is refer to, wherein, Fig. 9 is wind loop oblique view in Fig. 1；Figure 10
It is wind loop sectional view.Device also includes：The one ring-type wind loop 12 for joining end to end machine-shaping by curved surface, the wind loop
12 at outer spiral casing air admission hole 9, to reduce air loss caused by the impeller, while reduce and are made an uproar caused by the impeller
Sound is by the inner spiral casing air admission hole and the outer spiral casing air admission hole to external radiation.Wind loop is a kind of as shown in Figure 9 and Figure 10
The annular element formed with Machining of Curved Surface, its function are to pass through inner spiral casing air admission hole to reduce air loss while reduce noise
With outer spiral casing air admission hole to external radiation.
As preferred in the present embodiment, Figure 11-Figure 12 is refer to, wherein, Figure 11 is motor schematic diagram；Figure 12 is motor
Support schematic diagram.The motor is installed in the impeller by a fixed part, and the motor includes：Motor shaft 14, motor shaft
Key 15 and motor case 16, the fixed part include：Electric machine support 17, support outer spiral casing mounting hole 18 and carriage motor peace
Hole 19 is filled, the motor axle key 15 is to prevent the impeller 1 and the motor 13 from rotating against, the motor case 16
It is fixed on by carriage motor mounting hole 19 on the electric machine support 17, and the electric machine support 17 passes through snail outside the support
Shell mounting hole 18 is fixed on the outer spiral casing.Motor is as shown in figure 11, and motor axle key is provided with its motor shaft.Motor branch
Frame is as shown in figure 12, is being provided with support outer spiral casing mounting hole and carriage motor mounting hole.
It should be appreciated that each several part of the present utility model can be realized with hardware, software, firmware or combinations thereof.
In above-mentioned embodiment, multiple steps or method can be performed in memory and by suitable instruction execution system with storage
Software or firmware realize.If for example, being realized with hardware, with another embodiment, this area public affairs can be used
Any one of following technology known or their combination are realized：With the logic for realizing logic function to data-signal
The discrete logic of gate circuit, there is the application specific integrated circuit of suitable combinational logic gate circuit, programmable gate array
(PGA), field programmable gate array (FPGA) etc..
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present utility model.In this manual, to the schematic table of above-mentioned term
State and be not necessarily referring to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be
Combined in an appropriate manner in any one or more embodiments or example.
In general, the various embodiments of the disclosure can be with hardware or special circuit, software, logic or its any combination
Implement.Some aspects can be implemented with hardware, and some other aspect can be with firmware or software implementation, and the firmware or software can
With by controller, microprocessor or other computing devices.Although the various aspects of the disclosure be shown and described as block diagram,
Flow chart is represented using some other drawing, but it is understood that frame described herein, equipment, system, techniques or methods can
With in a non limiting manner with hardware, software, firmware, special circuit or logic, common hardware or controller or other calculating
Equipment or some combinations are implemented.
Although in addition, operation is described with particular order, this is understood not to require this generic operation with shown suitable
Sequence is performed or performed with generic sequence, or requires that all shown operations are performed to realize expected result.In some feelings
Under shape, multitask or parallel processing can be favourable.Similarly, begged for although the details of some specific implementations is superincumbent
By comprising but these are not necessarily to be construed as any restrictions to the scope of the present disclosure, but the description of feature is only pin in
To specific embodiment.Some features described in some embodiments of separation can also be held in combination in single embodiment
OK.Mutually oppose, the various features described in single embodiment can also in various embodiments be implemented separately or to appoint
The mode of what suitable sub-portfolio is implemented.
Claims (9)
1. a kind of low noise centrifugal fan for being provided with noise-reducing acoustic liner, including：Impeller, spiral case and motor, the impeller and
The motor is installed in the spiral case, and the motor is connected with the impeller, and to drive the impeller to rotate, its feature exists
In the spiral case also includes：Perforated plate inner spiral casing and outer spiral casing,
The perforated plate inner spiral casing is installed on inside the outer spiral casing, and forms an accommodating cavity,
Silencing cotton is filled with the accommodating cavity,
At least laying is drawn in the outer surface of the perforated plate inner spiral casing covered with one layer of Kev as noise-reducing acoustic liner.
2. low noise centrifugal fan according to claim 1, it is characterised in that in the perforated plate inner spiral casing by wearing
Orifice plate is process, and the thickness of the perforated plate is 0.8-2 millimeters, a diameter of 0.5-3 millimeters in each hole, and punching rate is
20%.
3. low noise centrifugal fan according to claim 1 or 2, it is characterised in that in the perforated plate inner spiral casing
On be additionally provided with inner spiral casing air admission hole and inner spiral casing venthole, the inner spiral casing air admission hole is round, the inner spiral casing venthole
For rectangle, respectively sucking and discharge air.
4. low noise centrifugal fan according to claim 1, it is characterised in that the outer spiral casing size is more than described
Perforated plate inner spiral casing, the outer spiral casing are process by iron plate, and outer spiral casing air admission hole, outer spiral casing are provided with the outer spiral casing
Venthole and outer spiral casing mounting hole, the outer spiral casing air admission hole are circle, and outer spiral casing venthole is rectangle, respectively causing
Blower fan sucks and discharge air, and the outer spiral casing mounting hole is fixing the low noise centrifugal fan.
5. low noise centrifugal fan according to claim 1, it is characterised in that the motor is pacified by a fixed part
Loaded in the impeller,
The motor includes：Motor shaft, motor axle key and motor case, the fixed part include：The outer snail of electric machine support, support
Shell mounting hole and carriage motor mounting hole,
The motor axle key to prevent the impeller and the motor from rotating against,
The motor case is fixed on the electric machine support by carriage motor mounting hole, and the electric machine support passes through institute
Support outer spiral casing mounting hole is stated to be fixed on the outer spiral casing.
6. low noise centrifugal fan according to claim 1, it is characterised in that the impeller includes：Multiple blades,
Wheel disc and motor drive installation hole, the motor drive installation hole are arranged on the wheel disc, and multiple blades are arranged at institute
State between wheel disc.
7. low noise centrifugal fan according to claim 1, it is characterised in that also include：One passes through curved surface head and the tail
The ring-type wind loop of connected machine-shaping,
The wind loop is located at outer spiral casing air inlet position, to reduce air loss caused by the impeller, while described in reduction
Noise caused by impeller is by the inner spiral casing air admission hole and the outer spiral casing air admission hole to external radiation.
8. a kind of air cleaning unit, it is characterised in that centrifugal logical including the low noise as described in claim any one of 1-7
Blower fan.
9. air cleaning unit according to claim 8, it is characterised in that the air cleaning unit includes：Purification of air
Device and/or VMC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720828081.3U CN207212704U (en) | 2017-07-10 | 2017-07-10 | A kind of low noise centrifugal fan, air cleaning unit for being provided with noise-reducing acoustic liner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720828081.3U CN207212704U (en) | 2017-07-10 | 2017-07-10 | A kind of low noise centrifugal fan, air cleaning unit for being provided with noise-reducing acoustic liner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207212704U true CN207212704U (en) | 2018-04-10 |
Family
ID=61812852
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720828081.3U Expired - Fee Related CN207212704U (en) | 2017-07-10 | 2017-07-10 | A kind of low noise centrifugal fan, air cleaning unit for being provided with noise-reducing acoustic liner |
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| CN (1) | CN207212704U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109404315A (en) * | 2018-11-02 | 2019-03-01 | 蚌埠学院 | A kind of adjustable air-introduced machine for boiler for producing |
| CN109838415A (en) * | 2019-03-12 | 2019-06-04 | 上海应达风机股份有限公司 | A kind of volute of blower and its assemble method with denoising device |
| WO2023273453A1 (en) * | 2021-06-29 | 2023-01-05 | 佛山市顺德区美的洗涤电器制造有限公司 | Fan assembly and household appliance |
-
2017
- 2017-07-10 CN CN201720828081.3U patent/CN207212704U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109404315A (en) * | 2018-11-02 | 2019-03-01 | 蚌埠学院 | A kind of adjustable air-introduced machine for boiler for producing |
| CN109838415A (en) * | 2019-03-12 | 2019-06-04 | 上海应达风机股份有限公司 | A kind of volute of blower and its assemble method with denoising device |
| WO2023273453A1 (en) * | 2021-06-29 | 2023-01-05 | 佛山市顺德区美的洗涤电器制造有限公司 | Fan assembly and household appliance |
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