CN206563002U - Spiral case, centrifugal blower and range hood for centrifugal blower - Google Patents
Spiral case, centrifugal blower and range hood for centrifugal blower Download PDFInfo
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- CN206563002U CN206563002U CN201720159337.6U CN201720159337U CN206563002U CN 206563002 U CN206563002 U CN 206563002U CN 201720159337 U CN201720159337 U CN 201720159337U CN 206563002 U CN206563002 U CN 206563002U
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Abstract
The utility model discloses a kind of spiral case, centrifugal blower and range hood for centrifugal blower, the spiral case for centrifugal blower includes：First spiral case plate；Second spiral case plate, the second spiral case plate is arranged at intervals with the first spiral case plate, at least one in the first spiral case plate and the second spiral case plate includes outside plate and inner panel, the outside plate is located at the side at the remote spiral case center of the inner panel, and limited between the outside plate and the inner panel spaced multiple sound-absorption holes are formed with sound absorption cavity, the inner panel；Spiral case coaming plate, the spiral case coaming plate is connected between the first spiral case plate and the second spiral case plate.According to the spiral case of the present utility model for centrifugal blower, by making to form sound absorption cavity in spiral case, and sound absorption cavity is caused to may be constructed porous resonance sound-absorbing structure.When spiral case is applied to centrifugal blower, the noise of centrifugal blower, the noise that especially reduction comes out through spiral case own radiation can be reduced.
Description
Technical field
The utility model is related to centrifugal blower field, more particularly, to a kind of spiral case, centrifugal blower for centrifugal blower
And range hood.
Background technology
At present, range hood has become one of essential cooking apparatus of average family.Centrifugal blower is with its suction
Greatly, extensive use is obtained the advantages of compact conformation in cooking fume control equipment.Raising and country with people's quality of the life is right
Enforcing for household electrical appliance noise criteria, increasingly harsher requirement is proposed to the low noise of range hood.Current market
On all kinds of oil-fume exhauster products level of noise it is still very high, noise becomes the main pain spot of consumer.
By research and analysis, the noise of range hood is mainly produced by centrifugal blower therein, sound a part from from
Air inlet and the air outlet outflow of heart blower fan, another part come out through the spiral case own radiation of centrifugal blower.In order to reduce out
Air port and the noise of air inlet, researchers have done substantial amounts of research, and achieve preferable effect, however, for passing through
The noise that spiral case own radiation comes out is at present still without more effective method.
Utility model content
The utility model is intended at least solve one of technical problem present in prior art.Therefore, of the present utility model
One purpose be propose a kind of spiral case for centrifugal blower, this spiral case applied to centrifugal blower when, can effectively reduce from
The noise of heart blower fan, the noise especially come out through spiral case own radiation.
Another purpose of the present utility model is to propose a kind of centrifugal blower with above-mentioned spiral case.
Further object of the present utility model is to propose a kind of range hood with above-mentioned centrifugal blower.
According to the spiral case for centrifugal blower of the utility model first aspect, including：First spiral case plate；Second spiral case
Plate, the second spiral case plate is arranged at intervals with the first spiral case plate, in the first spiral case plate and the second spiral case plate
At least one includes outside plate and inner panel, and the outside plate is located at the side at the remote spiral case center of the inner panel, and described outer
Limited between plate and the inner panel and spaced multiple sound-absorption holes are formed with sound absorption cavity, the inner panel；Spiral case coaming plate, institute
Spiral case coaming plate is stated to be connected between the first spiral case plate and the second spiral case plate.
According to the spiral case of the present utility model for centrifugal blower, by making to form sound absorption cavity in spiral case, and cause sound-absorbing
Chamber may be constructed porous resonance sound-absorbing structure.When spiral case is applied to centrifugal blower, reduction centrifugal blower noise can be played
Effect, the noise that especially reduction is come out through spiral case own radiation, and also sound absorption cavity is simple in construction so that spiral case processing side
Just, production efficiency is high.
In addition, can also have following additional technical feature according to the spiral case of the present utility model for centrifugal blower：
According to one embodiment of the present utility model, the outside plate and the inner panel are parallel to each other, the outside plate and described
The distance between inner panel is D, wherein the D is met：2mm≤D≤50mm.
According to one embodiment of the present utility model, the punching rate of the inner panel is less than or equal to 30%.
According to one embodiment of the present utility model, each sound-absorption hole is circular hole and a diameter of d, wherein the d is full
Foot：1mm≤d≤7mm.
According to one embodiment of the present utility model, sound absorber materials and parts are provided with the sound absorption cavity.
According to one embodiment of the present utility model, the sound absorber materials and parts are fire-retardant sound absorber materials and parts.
According to the centrifugal blower of the utility model second aspect, including being used for according to the above-mentioned first aspect of the utility model
The spiral case of centrifugal blower.
According to the range hood of the utility model third aspect, including according to the centrifugation of the above-mentioned second aspect of the utility model
Blower fan.
Additional aspect and advantage of the present utility model will be set forth in part in the description, partly by from following description
In become obvious, or by it is of the present utility model practice recognize.
Brief description of the drawings
Of the present utility model above-mentioned and/or additional aspect and advantage will from description of the accompanying drawings below to embodiment is combined
Become substantially and be readily appreciated that, wherein：
Fig. 1 is the schematic diagram of the spiral case for centrifugal blower according to the utility model embodiment；
Fig. 2 is the front view of the spiral case for centrifugal blower shown in Fig. 1；
Fig. 3 is the profile of the line A-A along along Fig. 2；
Fig. 4 is the side view of the spiral case for centrifugal blower shown in Fig. 2；
Fig. 5 is the sectional view of the line B-B along along Fig. 4；
Fig. 6 is the sectional view of the line C-C along along Fig. 4；
Fig. 7 is the schematic diagram of the first inner panel shown in Fig. 5；
Fig. 8 is the enlarged drawing at the D that Fig. 7 centre circles show；
Fig. 9 is the schematic diagram of the second spiral case plate shown in Fig. 6；
Figure 10 is the enlarged drawing at the E that Fig. 9 centre circles show；
Figure 11 is the side view of the second inner panel shown in Fig. 9.
Reference：
100：Spiral case；
100a：Air inlet；100b：Air outlet；10：First sound absorber materials and parts；20：Second sound absorber materials and parts；
1：First spiral case plate；11：First outside plate；12：First inner panel；12a：First sound-absorption hole；13：First coaming plate；
2：Second spiral case plate；20a：Opening；20b：Fixing hole；
21：Second outside plate；22：Second inner panel；22a：Second sound-absorption hole；23：Second coaming plate；
3：Spiral case coaming plate；4：Volute flange；5：Snail tongue body；6：Fixed pin.
Embodiment
Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element or element with same or like function are represented to same or similar label eventually.Below by ginseng
The embodiment for examining accompanying drawing description is exemplary, is only used for explaining the utility model, and it is not intended that to of the present utility model
Limitation.
In description of the present utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer ",
The orientation or position relationship of the instruction such as " clockwise ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " are based on shown in the drawings
Orientation or position relationship, are for only for ease of description the utility model and simplify description, rather than indicate or imply signified dress
Put or element there must be specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to the utility model
Limitation.In addition, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include one or more this feature.In description of the present utility model, unless otherwise indicated, the implication of " multiple "
It is two or more.
, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in description of the present utility model
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly
Connection；Can be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected to by intermediary,
It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
Concrete meaning of the language in the utility model.
In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or it
" under " can directly be contacted including the first and second features, it is not direct contact but logical that can also include the first and second features
The other characterisation contact crossed between them.Moreover, fisrt feature second feature " on ", " top " and " above " include the
One feature is directly over second feature and oblique upper, or is merely representative of fisrt feature level height higher than second feature.First is special
Levy second feature " under ", " lower section " and " below " include fisrt feature directly over second feature and oblique upper, or only
Represent that fisrt feature level height is less than second feature.
The spiral case 100 for centrifugal blower according to the utility model embodiment is described below with reference to Fig. 1-Figure 11.
As Figure 1-Figure 11, according to the spiral case 100 for centrifugal blower of the utility model embodiment, including the first snail
Coverboard 1, the second spiral case plate 2 and spiral case coaming plate 3.
Second spiral case plate 2 is arranged at intervals with the first spiral case plate 1, at least one in the first spiral case plate 1 and the second spiral case plate 2
Including outside plate and inner panel, outside plate is located at the side at the center of remote spiral case 100 of inner panel, and sound-absorbing is limited between outside plate and inner panel
Be formed with spaced multiple sound-absorption holes on chamber, inner panel, spiral case coaming plate 3 be connected to the first spiral case plate 1 and the second spiral case plate 2 it
Between.
For example, as Figure 1-Figure 11, spiral case coaming plate 3 can be the shaped form plate with helix shape, the second spiral case
The spiral case plate 1 of plate 2 and first is disposed on the rear and front end (for example, two ends in Fig. 1 on width) of spiral case coaming plate 3, and
The modes such as spiral case coaming plate 3 can be connected through a screw thread, be interference fitted, buckle or welding are connected to the second spiral case plate 2 and the first snail
The outer edge of coverboard 1, now the first spiral case plate 1, the second spiral case plate 2 and spiral case coaming plate 3 are limited on cavity, cavity and had jointly
There are air inlet 100a and air outlet 100b, wherein air inlet 100a can be formed on the first spiral case plate 1, air outlet 100b can be with
Surrounded jointly by the first spiral case plate 1, the second spiral case plate 2 and spiral case coaming plate 3.Due in the first spiral case plate 1 and the second spiral case plate 2
At least one include limited between outside plate and inner panel, and outside plate and inner panel be formed with sound absorption cavity, inner panel it is spaced many
Individual sound-absorption hole, thus, sound absorption cavity may be constructed porous resonance sound-absorbing structure, when spiral case 100 is applied to centrifugal blower, Ke Yiqi
To the effect of reduction centrifugal blower noise, the noise come out in centrifugal blower through the own radiation of spiral case 100 is especially reduced, and
And it is simple in construction due to sound absorption cavity, so that spiral case 100 is easy to process, production efficiency is higher.
Specifically, porous resonance sound-absorbing structure can compare for a spring and hang with thereon certain mass object be total to
With the simple vibrational system of composition, using the air column in sound-absorption hole pore-throat as incompressible friction free fluid, and will
Its analogy is the quality (being acoustically referred to as acoustic mass) of vibrational system, the sound absorption cavity for having air is compared into spring, it can be resisted
The pressure of external sound wave, equivalent to neck degree, referred to as acoustic compliance.When external sound wave passes to sound absorption cavity, the air column in aperture pore-throat exists
Moved in the presence of sound wave as piston, so that partial air molecule makes acoustic energy be changed into heat energy and disappeared with hole wall friction
Consumption (acoustically be referred to as acoustic resistance), this frictional damping equivalent to mechanical oscillation.Generally, the size of sound absorption cavity is significantly less than external sound
Air column in the wavelength of ripple, pore-throat moves reciprocatingly in the presence of sound wave as piston, when the intrinsic frequency of sound absorption cavity
It will be resonated when consistent with the frequency of external sound wave, now the amplitude of air column reaches maximum in pore-throat, acoustic resistance is maximum, disappears
The acoustic energy of consumption is most, so as to reach effective noise reduction.
It is understood that when only one in the first spiral case plate 1 and the second spiral case plate 2 includes outside plate and inner panel,
The effect of reduction noise can be reached when spiral case 100 is applied to centrifugal blower.Below will be with the first spiral case plate 1 and the second snail
Coverboard 2 includes being described in detail exemplified by outside plate and inner panel.
As Figure 1-Figure 11, the first spiral case plate 1 includes the first outside plate 11 and the first inner panel 12 that internal and external partition is set, the
Spaced multiple first sound-absorption hole 12a are formed with one inner panel 12, and the second spiral case plate 2 includes what internal and external partition was set
Spaced multiple second sound-absorption hole 22a are formed with second outside plate 21 and the second inner panel 22, the second inner panel 22.First outside plate
11 and first inner panel 12 inner side can be provided with the first coaming plate 13, and the first coaming plate 13 can be connected through a screw thread, be interference fitted,
The mode such as buckle or welding is connected with the first outside plate 11, the first inner panel 12, and now the first outside plate 11, the first inner panel 12 and first enclose
The first sound absorption cavity is limited between plate 13 jointly, due to there are multiple first sound-absorption hole 12a on the first inner panel 12, so that the first sound-absorbing
Chamber constitutes porous resonance sound-absorbing structure.Similarly, the inner side of the second outside plate 21 and the second inner panel 22 can be provided with the second coaming plate
23, and the mode such as the second coaming plate 23 can be connected through a screw thread, be interference fitted, buckle or welding with the second outside plate 21, second
Plate 22 is connected, and now limits the second sound absorption cavity jointly between the second outside plate 21, the second inner panel 22 and the second coaming plate 23, due to the
There are multiple second sound-absorption hole 22a on two inner panels 22, so that the second sound absorption cavity also constitutes porous resonance sound-absorbing structure.
When spiral case 100 is applied to centrifugal blower, the opening that through-thickness runs through is could be formed with the second spiral case plate 2
20a, multiple fixing hole 20b are provided at circumferentially spaced on the second inner panel 22 along opening 20a's, and the motor of centrifugal blower can pass through
Multiple fixing hole 20b are connected with the second spiral case plate 2, and motor shaft is stretched into the cavity of spiral case 100, and the impeller of centrifugal blower is arranged on
On motor shaft and in above-mentioned cavity so that motor can be rotated with impeller, so that at the air inlet 100a of spiral case 100
Produce negative pressure.When centrifugal blower works, gas enters cavity from air inlet 100a, and turns with the high-speed rotation of impeller
It is dynamic so that gas obtains certain energy, and gas is during rotation, and due to the effect of centrifugal inertial force, gas is turned to
The outer rim of impeller, potential energy and the kinetic energy increase of gas, and flowed out from the air outlet 100b of spiral case 100.In above process, centrifuge
Blower fan can produce noise, such as the wind that gas current friction is produced is made an uproar and operates the vibrating noise produced with motor, and due to the first suction
Sound chamber and the second sound absorption cavity constitute porous resonance sound-absorbing structure, can effective sound energy consumption, pass through in reduction centrifugal blower
The noise that the own radiation of spiral case 100 comes out, improves the sound quality of centrifugal blower.
According to the spiral case 100 for centrifugal blower of the utility model embodiment, by making the first spiral case plate 1 and the second snail
At least one in coverboard 2 includes outside plate and inner panel, and limits between outside plate and inner panel sound absorption cavity, and is formed with inner panel
Spaced multiple sound-absorption holes, so that sound absorption cavity may be constructed porous resonance sound-absorbing structure.When spiral case 100 be applied to from
During heart blower fan, it can play a part of reducing centrifugal blower noise, especially reduction is through making an uproar that the own radiation of spiral case 100 comes out
Sound, and sound absorption cavity is simple in construction so that and spiral case 100 is easy to process, production efficiency is high.
Here, it is necessary to which explanation, common due to that will occur when the intrinsic frequency of sound absorption cavity is consistent with the frequency of external sound wave
Shake, the acoustic energy of now sound absorption cavity consumption is most, so (or being sound-absorbing frequency range) of sound absorption cavity to frequency range near resonant frequency
External sound wave has a preferable absorption, and the parameter such as the distance between outside plate and inner panel D, the punching rate of inner panel and sound-absorption hole size
Sound-absorbing frequency range can be influenceed, so as to set the punching rate of the distance between outside plate and inner panel D, inner panel according to sound-absorbing frequency range
With the size of sound-absorption hole etc., and sound-absorbing frequency range can be set according to the frequency for the noise that come out through the own radiation of spiral case 100.
In some alternative embodiments of the present utility model, outside plate and inner panel are parallel to each other, between outside plate and inner panel away from
Met from for D, wherein D：2mm≤D≤50mm.Thus, it is possible to by setting the distance between outside plate and inner panel D to meet sound-absorbing
The requirement of frequency range, so that when spiral case 100 is applied to centrifugal blower, the noise of centrifugal blower can be reduced, it is particularly possible to effectively
The noise that reduction comes out through the own radiation of spiral case 100, preferably meets practical application.
Alternatively, (the area sum of all sound-absorption holes accounts for the ratio of the surface area of inner panel to the punching rate of inner panel i.e. on inner panel
Example) it is less than or equal to 30%.It again may be by setting the punching rate of inner panel to meet the requirement of sound-absorbing frequency range, with spiral case 100
During applied to centrifugal blower, the noise of centrifugal blower is reduced.
Alternatively, each sound-absorption hole be circular hole, and a diameter of d of circular hole, wherein d meet：1mm≤d≤7mm.Sound-absorption hole
It is simple in construction, it is easy to process, and the requirement of sound-absorbing frequency range can be met by setting the size of sound-absorption hole, with spiral case
100 be applied to centrifugal blower when, reduce centrifugal blower noise.It is understood that sound-absorption hole can also be other shapes, example
Such as slotted eye, tri-angle-holed or elongate holes.
For example, as shown in Fig. 3-Figure 11, the first spiral case plate 1 and the second spiral case plate 2 vertical with spiral case coaming plate 3 can connect
Connect, and the first spiral case plate 1 includes the first outside plate 11 and the first inner panel 12 that internal and external partition is set, the second spiral case plate 2 includes inside and outside
The spaced inner panel 22 of second outside plate 21 and second, the first outside plate 11 be arranged in parallel with the first inner panel 12, the second outside plate 21 with
First inner panel 12 be arranged in parallel, and the distance between the first outside plate 11 and the first inner panel 12 D12mm≤D can be met1≤ 50mm,
The distance between second outside plate 21 and the second inner panel 22 D22mm≤D can be met2≤ 50mm, the punching rate of the first inner panel 12 is less than
Punching rate equal to 30%, second inner panel 22 is less than or equal to 30%.Wherein, the first sound-absorption hole 12a and the second sound-absorption hole 22a can be with
It is circular hole, the first sound-absorption hole 12a diameter d1Meet 1mm≤d1≤ 7mm, the second sound-absorption hole 22a diameter d2Meet 1mm≤
d2≤7mm.Thus, it is possible to by adjusting D1, apart from D2, punching rate, diameter d1With diameter d2Suction can be preferably met etc. parameter
The requirement of audio section, so as to farthest lower the noise come out through the own radiation of spiral case 100.It is understood that many
Individual first sound-absorption hole 12a size can be with incomplete same, and same multiple second sound-absorption hole 22a size can also incomplete phase
Together.
In further embodiment of the present utility model, sound absorber materials and parts are provided with sound absorption cavity.The inside of sound absorber materials and parts
The rambling passage being made up of countless micro-pores, external sound wave enters these passages, and continuation is propagated in passage,
Because the passage in sound absorber materials and parts plays the role of to rub and damped to sound wave, so that, sound absorber materials and parts can also turn acoustic energy
Turn to heat energy and consume, reduce the acoustic energy of noise, thus, reduce further noise, and by being set in sound absorption cavity
Sound absorber materials and parts, can suitably increase punching rate, can so increase the frictional resistance of pore-throat neck portion, so as to widen suction
Audio section so that sound-absorbing frequency range can be in the range of 300Hz~500Hz, 1000Hz~2000Hz and 3000Hz~6000Hz etc.
It is preferably provided with according to actual conditions, and then improves the applicability of spiral case 100.Wherein, sound absorber materials and parts are preferably filled with whole suction
Sound chamber, it is possible to achieve more balancedly noise reduction.Sound absorber materials and parts are chosen as fire-retardant sound absorber materials and parts (such as high fire-retardance sound-absorbing
Material), have a safety feature.But not limited to this.Now the punching rate of inner panel can be less than or equal to 30%.
For example, as shown in figure 3, be filled with the first sound absorber materials and parts 10 in the first spiral case plate 1, and the first sound absorber materials and parts 10
Full of the first sound absorption cavity in the first spiral case plate 1, the second sound absorber materials and parts 20, and the second sound-absorbing are filled with the second spiral case plate 2
Material pieces 20 are full of the second sound absorption cavity in the second spiral case plate 2.Thus, can be effectively and equal when spiral case 100 is used for centrifugal blower
The noise of weighing apparatus ground reduction centrifugal blower, and can further make the simple in construction, easily manufactured of spiral case 100.
As shown in figure 1, one end of the arc surface of spiral case coaming plate 3 is provided with snail tongue body 5, when spiral case 100 is applied to centrifugal blower
When, snail tongue body 5 can improve the air suction efficiency of centrifugal blower, so as to improve the performance of centrifugal blower.Wherein, snail tongue body 5 can be with
It is separately formed.
As shown in figs 1 to 6, at the air outlet 100b of spiral case 100 be provided with volute flange 4, and the shape of volute flange 4 with
Air outlet 100b shape is adapted, with when spiral case 100 is applied to centrifugal blower, be easy to the parts such as centrifugal blower and pipeline it
Between connection.
According to the centrifugal blower of the utility model second aspect embodiment, including according to the above-mentioned first aspect of the utility model
The spiral case 100 for centrifugal blower of embodiment.
According to the centrifugal blower of the utility model embodiment, by using above-mentioned spiral case 100, centrifugation can be effectively reduced
The noise of blower fan, the noise that especially reduction comes out through the own radiation of spiral case 100.
It is understood that centrifugal blower can be used in the equipment such as cooling tower, the apparatus of air conditioning and household electrical appliance, under
Face is illustrated so that centrifugal blower is applied to range hood as an example.
According to the range hood of the utility model third aspect embodiment, including according to the above-mentioned second aspect of the utility model
The centrifugal blower of embodiment.Range hood may be mounted above cooking stove, can produce the waste of cooking stove burnup and cooking process
Harmful oil smoke take away rapidly, discharge is outdoor, reduces pollution, purification air, and have gas defence, explosion-proof safety guarantee
Effect.
The outward flange of second spiral case plate 2 has been provided at circumferentially spaced multiple fixed pin 6 along spiral case 100, for example, in Fig. 1 and
In Fig. 2 example, the outward flange of the second spiral case plate 2 is provided with three fixed pin 6.Thus, when centrifugal blower is applied to fume-exhausting
During machine, centrifugal blower can be connected by multiple fixed pin 6 with other parts of range hood, to realize the peace of centrifugal blower
Dress is fixed.
According to the range hood of the utility model embodiment, by using above-mentioned centrifugal blower, suction can be effectively reduced
The noise of lampblack absorber, realizes safety, low noise and good sound quality demand, improves the experience effect of user.
According to other compositions of the range hood of the utility model embodiment and operation for ordinary skill people
All it is known for member, is not detailed herein.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ",
The description of " example ", " specific example " or " some examples " etc. means to combine specific features, the knot that the embodiment or example are described
Structure, material or feature are contained at least one embodiment of the present utility model or example.In this manual, to above-mentioned art
The schematic representation of language is not necessarily referring to identical embodiment or example.Moreover, description specific features, structure, material or
Person's feature can in an appropriate manner be combined in any one or more embodiments or example.
While there has been shown and described that embodiment of the present utility model, it will be understood by those skilled in the art that：
These embodiments can be carried out with a variety of changes, modification in the case where not departing from principle of the present utility model and objective, replaced
And modification, scope of the present utility model limits by claim and its equivalent.
Claims (8)
1. a kind of spiral case for centrifugal blower, it is characterised in that including：
First spiral case plate；
Second spiral case plate, the second spiral case plate and the first spiral case plate are arranged at intervals, the first spiral case plate and described the
At least one in two spiral case plates includes outside plate and inner panel, and the outside plate is located at the one of the remote spiral case center of the inner panel
Limited between side, and the outside plate and the inner panel and spaced multiple sound-absorption holes are formed with sound absorption cavity, the inner panel；
Spiral case coaming plate, the spiral case coaming plate is connected between the first spiral case plate and the second spiral case plate.
2. the spiral case according to claim 1 for centrifugal blower, it is characterised in that the outside plate and the inner panel are mutual
Parallel, the distance between the outside plate and the inner panel are D, wherein the D is met：2mm≤D≤50mm.
3. the spiral case according to claim 1 for centrifugal blower, it is characterised in that the punching rate of the inner panel is less than etc.
In 30%.
4. the spiral case according to claim 1 for centrifugal blower, it is characterised in that each sound-absorption hole be circular hole and
A diameter of d, wherein the d is met：1mm≤d≤7mm.
5. the spiral case for centrifugal blower according to any one of claim 1-4, it is characterised in that in the sound absorption cavity
Provided with sound absorber materials and parts.
6. the spiral case according to claim 5 for centrifugal blower, it is characterised in that the sound absorber materials and parts are inhaled to be fire-retardant
Sound material pieces.
7. a kind of centrifugal blower, it is characterised in that including the centrifugal blower that is used for according to any one of claim 1-6
Spiral case.
8. a kind of range hood, it is characterised in that including centrifugal blower according to claim 7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720159337.6U CN206563002U (en) | 2017-02-21 | 2017-02-21 | Spiral case, centrifugal blower and range hood for centrifugal blower |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720159337.6U CN206563002U (en) | 2017-02-21 | 2017-02-21 | Spiral case, centrifugal blower and range hood for centrifugal blower |
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| CN206563002U true CN206563002U (en) | 2017-10-17 |
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| CN114076336A (en) * | 2020-08-20 | 2022-02-22 | 佛山市顺德区美的洗涤电器制造有限公司 | Air outlet cover and oil fume suction equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107975853A (en) * | 2018-01-11 | 2018-05-01 | 山东小鸭集团小家电有限公司 | A kind of low noise self-cleaning type range hood |
| CN108731081A (en) * | 2018-07-14 | 2018-11-02 | 佛山市云米电器科技有限公司 | A kind of kitchen ventilator with noise filtering function exhausting component |
| CN108731065A (en) * | 2018-07-14 | 2018-11-02 | 佛山市云米电器科技有限公司 | A kind of kitchen ventilator with noise filtering function guiding subassembly |
| CN108731081B (en) * | 2018-07-14 | 2024-01-09 | 佛山市云米电器科技有限公司 | Range hood with noise filtering function exhaust component |
| CN110211560A (en) * | 2019-05-31 | 2019-09-06 | 广东美的制冷设备有限公司 | Resonance sound-absorbing structure and air-conditioning draught fan component |
| CN110211560B (en) * | 2019-05-31 | 2022-02-08 | 广东美的制冷设备有限公司 | Resonance sound absorption structure and air conditioner fan subassembly |
| CN114076124A (en) * | 2020-08-20 | 2022-02-22 | 佛山市顺德区美的洗涤电器制造有限公司 | Centrifugal volute, centrifugal fan and range hood equipment |
| CN114076336A (en) * | 2020-08-20 | 2022-02-22 | 佛山市顺德区美的洗涤电器制造有限公司 | Air outlet cover and oil fume suction equipment |
| CN114076336B (en) * | 2020-08-20 | 2023-07-04 | 佛山市顺德区美的洗涤电器制造有限公司 | Air outlet cover and fume absorbing equipment |
| 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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| GR01 | Patent grant | ||
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| TR01 | Transfer of patent right |
Effective date of registration: 20230403 Address after: 241000 west side of 3 / F, No.5 office building, new energy and new materials gathering area, Fuzhou Road, Jiangbei District, Wuhu City, Anhui Province Patentee after: Wuhu Midea intelligent kitchen electricity Manufacturing Co.,Ltd. Address before: 528311, 26-28, B District, Mei headquarters building, 6 Mei Road, Beijiao Town, Shunde District, Foshan, Guangdong. Patentee before: MIDEA GROUP Co.,Ltd. |