CN109973438A - A kind of centrifugal blower volute - Google Patents
A kind of centrifugal blower volute Download PDFInfo
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- CN109973438A CN109973438A CN201910333585.1A CN201910333585A CN109973438A CN 109973438 A CN109973438 A CN 109973438A CN 201910333585 A CN201910333585 A CN 201910333585A CN 109973438 A CN109973438 A CN 109973438A
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/422—Discharge tongues
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4226—Fan casings
- F04D29/4233—Fan casings with volutes extending mainly in axial or radially inward direction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
- F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
- F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Include air outlet the present invention relates to a kind of centrifugal blower volute and the cavity for accommodating impeller, spiral case inner wall has the volute tongue projecting inward to cavity at neighbouring air outlet, the molded line of spiral case includes positioned at molded line one end and corresponding to the start line AP at volute tongue position and the end lines HG positioned at the molded line other end, the first connecting line PD and the second connecting line DG are successively arranged between start line AP and end lines HG, the starting point P point of first connecting line PD is located at volute tongue, the D point of first connecting line PD is the position between spiral case inner wall and impeller excircle at minimum clearance, and the line between D point and impeller center of circle O is OD, second part connecting line DG line OD opposite with the first connecting line PD is in mirror symmetry.In this way, change at minimum clearance with a distance from volute tongue, big turning have passed through when cooking fume stream is by volute tongue, reduce Oil-gas Separation and accumulation caused by impact of the air-flow at the minimum clearance, and then reduce subsequent greasy dirt and accumulated at volute tongue.
Description
Technical field
The present invention relates to blower fields, and in particular to a kind of centrifugal blower volute.
Background technique
The range hood of household is realized using centrifugal blower to be extracted oil laden air out kitchen and is discharged into common flue or straight
Run in outdoor out, wherein the advantages that centrifugal blower is big, noise is low, compact-sized with its suction and obtained in range hood
It is widely applied.
Spiral case is one of core component of centrifugal blower, and effect is will to leave the gas concentration of impeller, is exported to spiral case
Outlet, and dynamic pressure is changed into static pressure.The spiral case of existing centrifugal blower include front shroud, back shroud and connection front shroud and after
The ring wall coaming plate of cover board, wherein remaining molded line in addition to volute tongue position is consistent with spiral case bottom plate for spiral case top plate, and centrifugal blower volute goes out
Volute tongue is installed near mouthful, the effect of volute tongue is to shunt the gas for being oriented to volute outlet, prevents portion gas in spiral case
Internal circulation flow, the influence important to persons of having such as centrifugal blower air quantity, wind pressure, efficiency and noises of the shape and form of volute tongue.
And conventional volute design is generally carried out by a metatheory, there are two it is assumed that assuming that flow parameter is uniformly distributed on import circumference
And spiral case interior air-flow momentum moment preserving, the spiral case inlet pressure by unitary Theoretical Design is usually equiangular helical spiral.But actually by
In the influence of volute shape non-axis symmetry, especially volute tongue, a pressure field heterogeneous will form in impeller outlet, it will necessarily
Make impeller outlet, i.e. spiral case inlet flow field is uneven.
The applicant earlier application Patent No. CN201720594983.5's (Authorization Notice No. CN206957987U)
Chinese utility model patent " a kind of centrifugal blower volute ", the spiral case inlet pressure further include the first helix CD for having the angle of flare constant
Tapered with the angle of flare the second helix EM, the first helix CD are connected with start line AC, the second helix EM and end lines MN
It is connected, also, ring wall is greater than the front and rear width of inner side edge, the design of the spiral case in the front and rear width of the outer side edges of fan outlet
Flow losses caused by being become smaller by compensating spiral case side-to-side dimensions with spiral case anteroposterior dimension, however range hood actually uses
Under environment, since medium is oil smoke air-flow, it is easy when volute tongue retains so that oil smoke separates, it is minimum that oil and fat accumulation flow to volute tongue
Point, it is the most obvious when being especially cold, it is accumulated for a long time using oil droplet coalescence and is easy after doing to be formed at volute tongue solid
Body drop, so that volute tongue becomes smaller with impeller clearance, is easy to cause noise to significantly increase, or even generates howling；And it is common shallow
Although tongue or indent volute tongue can reduce oil and fat accumulation to a certain extent, actual gap is also increased, so that maximum quiet
Pressure and user's actual flow have decline.
Summary of the invention
First technical problem to be solved by this invention is in view of the above-mentioned state of the art, to provide a kind of by changing
Become the position at the minimum clearance of impeller and spiral case apart from volute tongue, subtracts to reduce air-flow and impact to reach in turn at minimum clearance
Small Oil-gas Separation and the centrifugal blower volute for accumulating purpose.
Second technical problem to be solved by this invention reaches reduction while being to provide a kind of reduction airflow reflux and makes an uproar
The centrifugal blower volute of sound purpose.
Third technical problem to be solved by this invention is to provide a kind of while keeping spiral case side-to-side dimensions to reduce
The centrifugal blower volute for the fluency that spiral case internal gas flow passes through can be improved.
The present invention solves technical solution used by above-mentioned first technical problem are as follows: a kind of centrifugal blower volute, including
Air outlet and cavity for accommodating impeller, the spiral case inner wall have the volute tongue projecting inward to cavity at neighbouring air outlet,
The molded line of the spiral case includes positioned at molded line one end and corresponding to the start line AP at volute tongue position and the knot positioned at the molded line other end
Bunch HG is successively arranged the first connecting line PD and the second connecting line DG, it is characterised in that: institute between start line AP and end lines HG
The starting point P point for stating the first connecting line PD is located at the volute tongue, and the D point of the first connecting line PD is spiral case inner wall and impeller outer
Position between circumference at minimum clearance, and the line between D point and impeller center of circle O is OD, the second connecting line DG
Part line OD opposite with the first connecting line PD is in mirror symmetry.
Further, the line OD and the angle formed by neighbouring air outlet side of the horizontal line by O point are θ0, θ0
∈ (90 °, 170 °].O point is fixed point, D point deflection angle θ at minimum clearance on the first connecting line PD0Design, further change
Thus the second connecting line DG, the first connecting line PD are successively passed through in oil smoke air-flow in position at minimum clearance and between volute tongue
And have passed through big turning when at volute tongue, it is further reduced air-flow Oil-gas Separation caused by the impact at minimum clearance and accumulation,
And then reduce accumulation of the subsequent greasy dirt at volute tongue.
The present invention solves technical solution used by above-mentioned second technical problem are as follows: the company of the P point and impeller center of circle O
The intersection point of line OP and impeller excircle is M, and the intersection point of line OD and impeller excircle is N, wherein between N point and D point away from
From for ND, the distance between P point and M point are MP, the distance ND=t, OD=t+R2, MP=k*t, ND≤MP, line OD with
It is θ by horizontal line angle formed by neighbouring air outlet side of O point0, wherein R2For impeller outer diameter, t is spiral case and impeller
Actual design gap between excircle, t/R2∈ [0.02,0.15], k ∈ [Isosorbide-5-Nitrae].The minimum clearance relationship of spiral case and impeller
Go out the separation and collection of stream, t/R to impeller2When ratio is less than 0.02, relative gap is smaller, and airflow reflux is few, but makes an uproar
Sound can obviously increase even howling；And t/R2When ratio is greater than 0.15, relative gap is bigger, but airflow reflux is more, lets out
Dew loss is bigger, needs to have comprehensively considered the factors such as noise, leakage, reflux.
In order to improve resistive drag force while adapt to big flow operating condition, formed angle is between the line OP and line OD
θ0- ω, wherein ω is line OP and crosses horizontal line angle formed by neighbouring air outlet side of impeller center of circle O, ω ∈
[40°,90°].O point in the center of circle is fixed point, and volute tongue is located at the design of spiral case air outlet position, when ω angle is greater than 90 °, is made a slip of the tongue out
Big that the effective collection section of spiral case is readily caused to be reduced, i.e., spiral case collection gas flow capability reduces, air-flow comes out rear spiral case from impeller will
This air-flow dynamic pressure is converted into the ability decline of static pressure, and the resistive drag force of entire blower fan system is deteriorated；If ω angle less than 40 °, is easy
Cause outlet too small, is shut off because outlet is too small by itself when the air-flow that spiral case gathers is gone out, flow resistance increases, Wu Fashi
Big flow operating condition is answered to work, ω angle combines factors and the suctions such as the conversion of spiral case dynamic and static pressure, resistance to flow output within this range
Kitchen ventilator will adapt to the multi-states such as high-drag and big flow.
Second connecting line can take various forms, excellent in order to improve the fluency that spiral case internal gas flow is collected with passed through
Selection of land, the second connecting line DG are the constant isogonism log spiral of the angle of flare.
Preferably, the polar radius of the second connecting line DGWherein, angle of flare α ∈
[3 °, 9 °], θ0For line OD and by horizontal line angle formed by neighbouring air outlet side of O point, θ is the second connecting line DG
The polar angle variable of upper arbitrary point, R2For impeller outer diameter.
In order to achieve the purpose that whole noise reduction, the second connecting line DG are the angle log spiral of angle of flare variation.
Second connecting line DG uses the form of the helix of varied angle, control different angle area's extension of a field that can be more convenient
Degree, so that the dynamic pressure of impeller outlet air-flow turns static pressure recycling ability and increases, the expansion ratio variation of partial region additionally aids entirety
Noise reduction.
Preferably, the polar radius of the second connecting line DGWherein, it can be changed the angle of flareα1And α2All ∈ [3,9], and α1≥α2,Adjustment item s
∈ [- 0.5,0.5], r ∈ [- 5,5] and r ≠ 1, α1For the angle of flare of D, α2For the angle of flare of G point,It is corresponding for variable helical line
Cornerite degree, θ0For line OD and by horizontal line angle formed by neighbouring air outlet side of O point, θ is the second connecting line DG
The polar angle variable of upper arbitrary point, R2For impeller outer diameter.
The present invention solves technical solution used by above-mentioned third technical problem are as follows: the second connecting line DG includes the
One helix DE, the second helix FG and the straightway EF for connecting the first helix DE and the second helix FG, first spiral shell
Spin line DE is connected with the first connecting line PD, and the E point and F point of the straightway EF is located at the level by impeller center O point
The two sides up and down of line OJ, and straightway EF, perpendicular to horizontal line OJ, the first helix DE is opposite with the first connecting line PD to be connected
Line OD is in mirror symmetry.
In order to reduce influence of the spiral case inlet pressure to centrifugal blower performance, J point on the straightway EF and impeller center of circle O it
Between distance L and impeller outer diameter R2Relationship are as follows: L/R2∈[1.1,1.7].It collects and leads in this way, improving spiral case internal gas flow
The fluency crossed improves the static pressure of maximum static pressure and effective wind rate section, realizes and reaches big spiral case effect under small size, drop
Low aerodynamic noise.
Compared with prior art, centrifugal blower volute of the invention retain shallow volute tongue or indent volute tongue be not easy because
While oil and fat accumulation generates howling feature, the first connecting line PD is the opposite line OD mirror image reversal in the second part connecting line DG
It obtains, changes at minimum clearance with a distance from volute tongue, successively pass through the second connecting line DG, the first connecting line in oil smoke air-flow
It has passed through big turning when at PD and volute tongue, reduce air-flow Oil-gas Separation caused by the impact at minimum clearance and accumulation, into
And reduces subsequent greasy dirt and accumulated at volute tongue, while static pressure and efficiency can also be promoted while noise does not increase；In addition,
Pass through D point deflection angle θ at minimum clearance0Design, change minimum clearance at and volute tongue between position, that is, pass through change
Cooking fume flows through the stroke of excessive turning, is further able to change the degree of Oil-gas Separation and accumulation, and then reduce greasy dirt in snail
Accumulation at tongue；And the design of straightway EF, spiral case side-to-side dimensions are reduced, spiral case internal gas flow is improved and collects and pass through
Fluency improves the static pressure of maximum static pressure and effective wind rate section, realizes and reaches big spiral case effect under small size, reduces
Aerodynamic noise.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the spiral case of the embodiment of the present invention one；
Fig. 2 is the cross-sectional view of Fig. 1；
Fig. 3 is the structural schematic diagram of the spiral case inlet pressure of the embodiment of the present invention one；
Fig. 4 is the structural schematic diagram of the spiral case inlet pressure of the embodiment of the present invention two.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
Embodiment one:
It as shown in Figure 1 to Figure 3, is one embodiment of the invention.The centrifugation wind for range hood of the present embodiment
Machine spiral case include front shroud 11, back shroud 12 and connection front shroud 11 and back shroud 12 between ring wall coaming plate 13, before above-mentioned
Cover board 11, back shroud 12 and ring wall coaming plate 13 are enclosed the cavity 1b that top has air outlet 1a, and cavity 1b is for accommodating
Impeller, air outlet 1a are located at the top of spiral case, and spiral case inner wall have in the position of neighbouring air outlet 1a it is projecting inward to cavity 1b
Volute tongue 131, volute tongue 131 is recessed inwardly relative to volute outer wall, as shallow volute tongue or indent volute tongue, and 131 shape of volute tongue
At on annular coaming plate 13, ring wall coaming plate 13 is in whole molded line, and volute tongue 131 is located at the initial position of annular coaming plate inner wall molded line,
The molded line includes positioned at molded line one end and corresponding to the start line AP at 131 position of volute tongue and the end lines positioned at the molded line other end
HG, is successively arranged the first connecting line PD and the second connecting line DG, the first connecting line PD and rises between start line AP and end lines HG
Initial line AP connection, the second connecting line DG are connected with the first connecting line PD, and the starting point P point of the first connecting line PD is located at volute tongue
At 131 positions, P point changes with the change in location of 131 radius size of volute tongue and volute tongue 131, and the D point of the first connecting line PD is in
At minimum clearance between 1 inner wall of spiral case and impeller excircle, i.e., the D point be above-mentioned minimum clearance at location point, and D point with
It is OD that impeller, which pinpoints the line between the O of the center of circle, and the second part connecting line DG line OD opposite with the first connecting line PD is in mirror image pair
Claim.
The isogonism log spiral that the second above-mentioned connecting line DG can use the angle of flare constant, the pole of the second connecting line DG
RadiusWherein, angle of flare α ∈ [3 °, 9 °], θ are that the pole of arbitrary point on the second connecting line DG is sat
Mark angle variables, R2For impeller outer diameter.And in the present embodiment, spiral case can be improved while keeping spiral case side-to-side dimensions to reduce
The fluency that internal gas flow passes through has carried out excision of stepping down to the second connecting line DG, and specifically, the second connecting line DG includes first
Helix DE, the second helix FG and the straightway EF, the first helix DE for connecting the first helix DE and the second helix FG
It is connected with the first connecting line PD, and the first helix DE line OD opposite with the first connecting line PD is in mirror symmetry.
In the present embodiment, the intersection point of the line OP and impeller excircle of P point and impeller center of circle O are M；Line OD and impeller outer
The intersection point of circumference is N, wherein the distance between N point and D point are ND, and the distance between P point and M point are MP, ND≤MP, ND=
T, OD=t+R2, MP=k*t, line OD and the horizontal line angle formed by neighbouring air outlet side for passing through O point are θ0, wherein
R2For impeller outer diameter, actual design gap of the t between spiral case and impeller excircle, t/R2∈ [0.02,0.15], k ∈ [Isosorbide-5-Nitrae],
θ0∈ (90 °, 170 °].In addition, formed angle is θ between line OP and line OD0- ω, wherein ω is line OP and crosses leaf
Take turns horizontal line angle formed by neighbouring air outlet side of center of circle O, ω ∈ [40 °, 90 °], center of circle O be fixed point, i.e. position not
Become.Volute tongue is located at the position of neighbouring spiral case air outlet, and when ω angle is greater than 90 °, the distance that P point can be made to separate out air port increases
Greatly, i.e., air stream outlet is excessive, will likely result in the effective collection section of spiral case and reduces, i.e., spiral case collect gas flow capability reduce, air-flow from
Spiral case declines the ability that this air-flow dynamic pressure is converted into static pressure after impeller comes out, and the resistive drag force of entire blower fan system is deteriorated；If ω
Angle is easy to cause outlet too small less than 40 °, is shut off because outlet is too small by itself when the air-flow that spiral case gathers is gone out, flows
Dynamic resistance increases, and can not adapt to the work of big flow operating condition, and ω angle combines the conversion of spiral case dynamic and static pressure, outlet resistance within this range
The factors such as power and range hood will adapt to the various workings such as high-drag and big flow.
As shown in figure 3, the E point and F point of above-mentioned straightway EF are located at the horizontal line OJ by impeller center O point
Upper and lower two sides, and straightway EF is perpendicular to horizontal line OJ, the distance between J point and impeller center of circle O on the straightway EF L and leaf
Take turns outer diameter R2Relationship are as follows: L/R2∈[1.1,1.7].Straightway EF and horizontal line OJ vertical design, improve spiral case internal gas flow
The fluency collected and passed through improves the static pressure of maximum static pressure and effective wind rate section, realizes and reaches big snail under small size
Shell effect, reduces aerodynamic noise.
Embodiment two:
As shown in figure 4, being second embodiment of the invention.The embodiment and the difference of above-described embodiment one are only that:
Second connecting line DG is the angle log spiral of angle of flare variation.Specifically, the polar radius of the second connecting line DGWherein, it can be changed the angle of flareα1And α2All
∈ [3,9], and α1≥α2,Adjustment item s ∈ [- 0.5,0.5], r ∈ [- 5,5] and r ≠ 1, α1For the expansion of D
Angle, α2For the angle of flare of G point,Cornerite degree, θ are corresponded to for variable helical line0For line OD with the horizontal line by O point neighbouring
Angle formed by air outlet side, θ are the polar angle variable of arbitrary point on the second connecting line DG, R2For impeller outer diameter.The
Two connecting line DG use the helix of varied angle, the expansion ratio in control different angle region that can be more convenient, so that leaf
The dynamic pressure of wheel exit flow turns static pressure recycling ability and increases, and the expansion ratio variation of partial region additionally aids whole noise reduction；In addition,
In the present embodiment, excision of stepping down also has been carried out on the second connecting line DG.
Claims (10)
1. a kind of centrifugal blower volute, the cavity including air outlet and for accommodating impeller, the spiral case inner wall is in neighbouring outlet air
There is the volute tongue projecting inward to cavity, the molded line of the spiral case includes positioned at molded line one end and corresponding to rising for volute tongue position at mouthful
Initial line AP and end lines HG positioned at the molded line other end, be successively arranged between start line AP and end lines HG the first connecting line PD and
Second connecting line DG, it is characterised in that: the starting point P point of the first connecting line PD is located at the volute tongue, the first connecting line
The D point of PD is the position between spiral case inner wall and impeller excircle at minimum clearance, and between D point and impeller center of circle O
Line is OD, and partially line OD opposite with the first connecting line PD is in mirror symmetry to the second connecting line DG.
2. centrifugal blower volute according to claim 1, it is characterised in that: the line OD and the horizontal line by O point
The angle formed by neighbouring air outlet side is θ0, θ0∈ (90 °, 170 °].
3. centrifugal blower volute according to claim 2, it is characterised in that: the line OP of the P point and impeller center of circle O with
The intersection point of impeller excircle is M, and the intersection point of line OD and impeller excircle is N, wherein the distance between N point and D point are
The distance between ND, P point and M point are MP, the distance ND=t, OD=t+R2, MP=k*t, ND≤MP, wherein R2For impeller
Outer diameter, actual design gap of the t between spiral case and impeller excircle, t/R2∈ [0.02,0.15], k ∈ [Isosorbide-5-Nitrae].
4. centrifugal blower volute according to claim 2, it is characterised in that: formed between the line OP and line OD
Angle is θ0- ω, wherein ω is line OP and crosses horizontal line angle formed by neighbouring air outlet side of impeller center of circle O, ω
∈[40°,90°]。
5. according to claim 1 to centrifugal blower volute described in any one of 4 claims, it is characterised in that: described second
Connecting line DG is the constant isogonism log spiral of the angle of flare.
6. centrifugal blower volute according to claim 5, it is characterised in that: the polar radius of the second connecting line DGWherein, θ0For line OD and by horizontal line folder formed by neighbouring air outlet side of O point
Angle, angle of flare α ∈ [3 °, 9 °], θ are the polar angle variable of arbitrary point on the second connecting line DG, R2For impeller outer diameter.
7. according to claim 1 to centrifugal blower volute described in any one of 4 claims, it is characterised in that: described second
Connecting line DG is the angle log spiral of angle of flare variation.
8. centrifugal blower volute according to claim 7, it is characterised in that: the polar radius of the second connecting line DGWherein, it can be changed the angle of flareα1And α2All ∈
[3,9], and α1≥α2,Adjustment item s ∈ [- 0.5,0.5], r ∈ [- 5,5] and r ≠ 1, α1For the angle of flare of D, α2
For the angle of flare of G point,Cornerite degree, θ are corresponded to for variable helical line0It is line OD and the horizontal line for passing through O point in neighbouring air outlet
Angle formed by side, θ are the polar angle variable of arbitrary point on the second connecting line DG, R2For impeller outer diameter.
9. according to claim 1 to centrifugal blower volute described in any one of 4 claims, it is characterised in that: described second
Connecting line DG includes the first helix DE, the second helix FG and the straightway for connecting the first helix DE and the second helix FG
EF, the first helix DE are connected with the first connecting line PD, and the E point and F point of the straightway EF is located at by impeller
The two sides up and down of the horizontal line OJ of center O point, and straightway EF connects perpendicular to horizontal line OJ, the first helix DE and first
Wiring PD is in mirror symmetry with respect to line OD.
10. centrifugal blower volute according to claim 9, it is characterised in that: J point and impeller circle on the straightway EF
The distance between heart O L and impeller outer diameter R2Relationship are as follows: L/R2∈[1.1,1.7]。
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| CN201910333585.1A CN109973438B (en) | 2019-04-24 | 2019-04-24 | Volute of centrifugal fan |
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|---|---|---|---|
| CN201910333585.1A CN109973438B (en) | 2019-04-24 | 2019-04-24 | Volute of centrifugal fan |
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| CN109973438B CN109973438B (en) | 2021-01-19 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374934A (en) * | 2019-08-02 | 2019-10-25 | 马鞍山宸宇达风机工业有限公司 | The installation method of blower volute tongue |
| CN110425157A (en) * | 2019-09-04 | 2019-11-08 | 宁波纽新克电机股份有限公司 | A kind of mixed gas centrifugal blower of heavy duty detergent |
| CN112628974A (en) * | 2020-12-07 | 2021-04-09 | 珠海格力电器股份有限公司 | Air conditioner control method, system, medium, equipment, air supply device and application |
| CN113137386A (en) * | 2020-01-19 | 2021-07-20 | 广东美的环境电器制造有限公司 | Air supply device |
| WO2021143044A1 (en) * | 2020-01-19 | 2021-07-22 | 广东美的环境电器制造有限公司 | Centrifugal fan and air supply device |
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| CN110425157B (en) * | 2019-09-04 | 2023-12-15 | 宁波纽新克电机有限公司 | Efficient gas mixing centrifugal fan |
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| CN113137386B (en) * | 2020-01-19 | 2024-04-05 | 广东美的环境电器制造有限公司 | Air supply device |
| CN112628974A (en) * | 2020-12-07 | 2021-04-09 | 珠海格力电器股份有限公司 | Air conditioner control method, system, medium, equipment, air supply device and application |
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