CN207278578U - Centrifugal blower volute, centrifugal blower and air-conditioning - Google Patents
Centrifugal blower volute, centrifugal blower and air-conditioning Download PDFInfo
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- CN207278578U CN207278578U CN201721352689.XU CN201721352689U CN207278578U CN 207278578 U CN207278578 U CN 207278578U CN 201721352689 U CN201721352689 U CN 201721352689U CN 207278578 U CN207278578 U CN 207278578U
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Abstract
The utility model provides a kind of centrifugal blower volute, centrifugal blower and air-conditioning, is related to centrifugal blower field.The centrifugal blower volute includes diversion shell, the first side plate and the second side plate of tubular structure.Wherein, diversion shell is internally provided with accommodating cavity, the both sides of diversion shell are connected with the first side plate and the second side plate respectively, air inlet is provided with first side plate and/or the second side plate, air inlet is connected with accommodating cavity, and diversion shell has the first end and the second end being oppositely arranged, and first end is provided with air outlet, the length of first end along diversion shell axis direction is more than length of the second end along diversion shell axis direction, and the inner wall molded line of diversion shell is divergence line.The centrifugal blower volute, centrifugal blower and air-conditioning of the utility model, the blowing area of its air outlet is wider, improves air-out effect, and increases the air quantity of suction wind, improves the efficiency of centrifugal blower, reduces noise.
Description
Technical field
Centrifugal blower field is the utility model is related to, more particularly to a kind of centrifugal blower volute, centrifugal blower and air-conditioning.
Background technology
Centrifugal blower is by the mechanical energy of input, improves gas pressure and supplies gas side by side the machinery of body.At present, in the market
A kind of centrifugal blower of idle call, its outlet air efficiency is low, and air-out effect is bad, causes the evaporator heat transfer efficiency of air-conditioning bad.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of centrifugal blower volute, its blowing area is wider, improves
Air-out effect, improves outlet air efficiency.
To reach above-mentioned purpose, what the technical solution of the utility model was realized in:
A kind of centrifugal blower volute, including the diversion shell of tubular structure, the first side plate and the second side plate, the blower inlet casing
Body is internally provided with accommodating cavity, and the both sides of the diversion shell are connected with first side plate and second side plate respectively,
Air inlet is provided with first side plate and/or second side plate, the air inlet is connected with the accommodating cavity, described to lead
Stream housing has the first end and the second end being oppositely arranged, and the first end is provided with air outlet, the first end
It is more than length of the second end along the diversion shell axis direction along the length of the diversion shell axis direction, it is described
The inner wall molded line of diversion shell is divergence line.
Further, first side plate and/or second side plate are to be obliquely installed.
Further, direction of first side plate close to one end of the first end away from second side plate
Tilt.
Further, first side plate and second side plate form V-arrangement, and first side plate is close to described first
One end of end away from second side plate direction tilt, second side plate close to one end of the first end to
The direction away from first side plate to tilt.
Further, first side plate and/or second side plate are tablet, arc panel or divergence line plate.
Further, the divergence line is involute or spiral of Archimedes.
Further, the divergence line is extended at the air outlet.
Relative to the prior art, the centrifugal blower volute described in the utility model embodiment has the advantage that:
Centrifugal blower volute described in the utility model embodiment, since the first end of diversion shell is along diversion shell axis
The length in line direction is more than length of the second end along diversion shell axis direction, along diversion shell axis direction at its air outlet
Length it is longer, can ensure air outlet blowout wind be diverging, the blowing area of such air outlet is wider, improves outlet air
Effect.Also, since the inner wall molded line of diversion shell is divergence line so that gas when being subject to the inner wall water conservancy diversion of diversion shell,
Gradually outwards diverging, until at air outlet.In such manner, it is possible to effectively improve outlet air efficiency, the work efficiency of centrifugal blower is improved.
The another object of the utility model is to provide a kind of centrifugal blower, its blowing area is wider, improves air-out effect,
Outlet air efficiency is improved, improves the work efficiency of centrifugal blower.
To reach above-mentioned purpose, what the technical solution of the utility model was realized in:
A kind of centrifugal blower, including wind wheel and centrifugal blower, the centrifugal blower volute include the blower inlet casing of tubular structure
Body, the first side plate and the second side plate, the diversion shell are internally provided with accommodating cavity, and the wind wheel is placed in the accommodating cavity
It is interior and can be rotated relative to the diversion shell.The both sides of the diversion shell respectively with first side plate and second side
Plate connects, and air inlet is provided with first side plate and/or second side plate, and the air inlet connects with the accommodating cavity
Logical, the diversion shell has the first end and the second end being oppositely arranged, and the first end is provided with air outlet, described
The length of first end along the diversion shell axis direction is more than the second end along the diversion shell axis direction
Length, the inner wall molded line of the diversion shell is divergence line.
Further, the wind wheel is two, and two wind wheels are set parallel.
Relative to the prior art, the centrifugal blower described in the utility model embodiment has the advantage that:
Centrifugal blower described in the utility model embodiment, at its air outlet along diversion shell axis direction length more
Long, the wind that can ensure air outlet blowout is diverging, and the blowing area of such air outlet is wider, improves air-out effect.And
And the inner wall molded line of diversion shell is divergence line so that gas is when being subject to the inner wall water conservancy diversion of diversion shell, gradually to outgoing
Dissipate, until at air outlet.In such manner, it is possible to effectively improve outlet air efficiency, the work efficiency of centrifugal blower is improved.
The further object of the utility model is to provide a kind of air-conditioning, its blowing area is wider, improves air-out effect, improves
Outlet air efficiency, improves the work efficiency of centrifugal blower, improves the heat exchange efficiency of evaporator.
To reach above-mentioned purpose, what the technical solution of the utility model was realized in:
A kind of air-conditioning, including centrifugal blower, centrifugal blower, including wind wheel and centrifugal blower, the centrifugal blower volute bag
Diversion shell, the first side plate and the second side plate of tubular structure are included, the diversion shell is internally provided with accommodating cavity, the wind
Wheel is placed in the accommodating cavity and can be rotated relative to the diversion shell.The both sides of the diversion shell are respectively with described
Side plate is connected with second side plate, and air inlet, the inlet air are provided with first side plate and/or second side plate
Mouth is connected with the accommodating cavity, and the diversion shell has the first end and the second end being oppositely arranged, the first end
Air outlet is provided with, the length of the first end along the diversion shell axis direction is more than the second end and is led described in
The length of housing axis direction is flowed, the inner wall molded line of the diversion shell is divergence line.
Relative to the prior art, the air-conditioning described in the utility model embodiment has the advantage that:
Air-conditioning described in the utility model embodiment, along the length of diversion shell axis direction at the air outlet of its centrifugal blower
Spend it is longer, can ensure air outlet blowout wind be diverging, the blowing area of such air outlet is wider, improve outlet air effect
Fruit.Also, the inner wall molded line of diversion shell is divergence line so that gas when being subject to the inner wall water conservancy diversion of diversion shell, gradually to
Outer diverging, until at air outlet.In such manner, it is possible to effectively improve outlet air efficiency, the work efficiency of centrifugal blower is improved.
Brief description of the drawings
, below will be to required use in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it will be appreciated that the following drawings illustrate only some embodiments of the utility model, therefore should not be by
Regard the restriction to scope as, for those of ordinary skill in the art, without creative efforts, may be used also
To obtain other relevant attached drawings according to these attached drawings.
Fig. 1 is the centrifugal blower dimensional structure diagram for the air-conditioning that the utility model embodiment provides;
Fig. 2 is the structure diagram at the first visual angle of the centrifugal blower for the air-conditioning that the utility model embodiment provides;
Fig. 3 is the structure diagram at the second visual angle of the centrifugal blower for the air-conditioning that the utility model embodiment provides;
Fig. 4 is the structure diagram at the 3rd visual angle of the centrifugal blower for the air-conditioning that the utility model embodiment provides.
Icon:10- centrifugal blowers;100- centrifugal blower volutes;110- diversion shells;111- first ends;1111- extends
Portion;1112- chokes;112- the second ends;The first side plates of 120-;The second side plates of 130-;140- air inlets;141- outer rings week
Edge;1411- divergent sections;1412- changeover portions;1413- linkage sections;142- inner ring peripheries;150- air outlets;160- installing plates;
161- mounting holes;200- wind wheels.
Embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model part of the embodiment, instead of all the embodiments.Usually here described in attached drawing and
The component of the utility model embodiment shown can be arranged and designed with a variety of configurations.
Therefore, requirement is not intended to limit to the detailed description of the embodiment of the utility model provided in the accompanying drawings below
The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Based in the utility model
Embodiment, those of ordinary skill in the art's all other embodiments obtained without creative efforts, all
Belong to the scope of the utility model protection.
It should be noted that:Similar label and letter represents similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent attached drawing in a attached drawing.
It should be noted that in the case where there is no conflict, the feature in embodiment and embodiment in the utility model can
To be mutually combined.
In the description of the utility model, it is to be understood that the orientation of the instruction such as term " on ", " under ", " interior ", " outer "
Or position relationship be based on orientation shown in the drawings or position relationship, or the utility model product using when usually put
Orientation or position relationship, or the orientation that usually understands of those skilled in the art or position relationship, are for only for ease of description
The utility model and simplified description, rather than indicate or imply that signified equipment or element must be with specific orientation, Yi Te
Fixed azimuth configuration and operation, therefore it is not intended that limitation to the utility model.
In addition, term " first ", " second ", " the 3rd " etc. are only used for distinguishing description, and it is not intended that instruction or hint
Relative importance.
In the description of the utility model, it is also necessary to which explanation, unless otherwise clearly defined and limited, term " are set
Put ", " installation ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly
Connection;Can mechanically connect or be electrically connected;It can be directly connected, can also be indirectly connected by intermediary,
It can be the connection inside two elements.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.
Embodiment
Fig. 1 and Fig. 2 are please referred to, present embodiments provides a kind of air-conditioning (not shown), which includes shell, and (figure is not
Show), centrifugal blower 10 and evaporator (not shown), centrifugal blower 10 and evaporator may be contained within shell.
Wherein, centrifugal blower 10 includes centrifugal blower volute 100 and wind wheel 200.Wind wheel 200 is arranged at centrifugal blower volute
In 100.
The centrifugal blower volute 100 includes diversion shell 110, the first side plate 120 and the second side plate 130 of tubular structure.
Diversion shell 110 is internally provided with accommodating cavity.Wind wheel 200 be placed in accommodating cavity and can opposite flow housing 110 rotate.
The both sides of diversion shell 110 are connected with the first side plate 120 and the second side plate 130 respectively, the first side plate 120 and/or
Air inlet 140 is provided with second side plate 130, air inlet 140 is connected with accommodating cavity.
It should be noted that can be that air inlet 140, two inlet airs are respectively provided with the first side plate 120 and the second side plate 130
Mouth 140 is oppositely arranged;Can also be that air inlet 140 is set on first side plate 120 or the second side plate 130, that is to say, that first
One of setting air inlet 140 in 120 and second side plate 130 of side plate, and another is then enclosed construction.The present embodiment
In, using being both provided with air inlet 140 on the first side plate 120 and the second side plate 130.
Diversion shell 110 has the first end 111 and the second end 112 being oppositely arranged, wherein, first end 111 is set
Air outlet 150 is equipped with, air outlet 150 is connected with accommodating cavity.In addition, air outlet 150 is connected with evaporator, so that air is via going out
Air port 150 flows through evaporator and carries out air heat exchange after discharging.
The length of first end 111 along 110 axis direction of diversion shell is more than the second end 112 along 110 axis of diversion shell
The length in line direction.
The centrifugal blower volute 100 of air-conditioning provided in this embodiment, first end 111 due to diversion shell 110 is along leading
The length of stream 110 axis direction of housing is more than length of the second end 112 along 110 axis direction of diversion shell, its air outlet 150
Place is longer along the length of 110 axis direction of diversion shell, can ensure that the wind that air outlet 150 is blown out is to dissipate, such outlet air
The blowing area of mouth 150 is wider, air-out effect is improved, so as to improve the heat exchange efficiency of the evaporator of air-conditioning.
Referring to Fig. 3, further, the first side plate 120 and/or the second side plate 130 are to be obliquely installed.That is, can
Be the first side plate 120 and the second side plate 130 be obliquely installed or, the first side plate 120 or the second side plate 130 are
It is obliquely installed, further, the first side plate 120 inclines close to direction of the one end of first end 111 away from the second side plate 130
Tiltedly.In the present embodiment, the first side plate 120 and the second side plate 130 are to be obliquely installed.
In the present embodiment, the first side plate 120 and the second side plate 130 form V-arrangement.And first side plate 120 close to first end
111 one end is tilted away from the direction of the second side plate 130, and the second side plate 130 is close to one end of first end 111 towards remote
Direction from the first side plate 120 tilts.In this way, being further ensured that the wind that air outlet 150 is blown out is diverging, outlet air surface is improved
Product, improves the heat exchange efficiency of evaporator.
In the present embodiment, the first side plate 120 and the second side plate 130 are to be symmetrical arranged.In such manner, it is possible to ensure diversion shell
110 both sides inlet airs are impartial.
In addition, the first side plate 120 and/or the second side plate 130 can be tablet, arc panel or divergence line plate.That is,
First side plate 120 and the second side plate 130 can be tablet, arc panel or divergence line plate or different types of tabular
Structure.It should be noted that wherein, divergence line plate refers to that cross section is in the platy structure of divergence line.If the first side plate 120
And/or second side plate 130 be divergence line plate, it is to be dissipated towards at air outlet 150, so that 150 bigger of air outlet, above-mentioned
Divergence line can be involute or spiral of Archimedes or other kinds of divergence line.In the present embodiment, first
120 and second side plate 130 of side plate is tablet.
In addition, please continue to refer to Fig. 1, preferably, in the present embodiment, wind wheel 200 is two, and two wind wheels 200 are parallel
Set.It should be noted that using traditional air-cooled ducted air conditioner, evaporator has the bad situation of certain length scope heat exchange efficiency,
In the case of conventional volute, three wind wheels 200 are at least needed to improve the bad situation of heat exchange efficiency, but use this implementation
The centrifugal blower 10 that example provides, it is only necessary to two wind wheels 200, you can improve heat exchange efficiency, can so improve production efficiency, drop
Low cost, and improve the intensity of air-conditioning after-sales service.
In addition, referring to Fig. 4, in the present embodiment, the inner wall molded line of diversion shell 110 is divergence line.Preferably, water conservancy diversion
The divergence line of housing 110 is extended at air outlet 150.In the present embodiment, diversion shell 110 has a bottom surface, which is flat
Face, the divergence line of diversion shell 110 extend to air outlet 150 by the bottom surface.
It should be noted that the inner wall molded line of diversion shell 110 refer to plane perpendicular to the axis of diversion shell 110 with
The intersection of the inner wall of diversion shell 110, the intersection are divergence line.Wherein, above-mentioned divergence line refer to the intersection by its away from go out
The one end in air port 150 is gradually outwards dissipated towards close to one end of air outlet 150 so that bore at air outlet 150 gradually to
Outer increase.
Preferably, the divergence line of the inner wall molded line of diversion shell 110 is involute or spiral of Archimedes.Certainly,
In the other embodiment of the utility model, the inner wall molded line of diversion shell 110 can also be other kinds of divergence line, as long as
Ensure diversion shell 110 inner wall molded line from its one end away from air outlet 150 towards close to air outlet 150 one end gradually to
Outer diverging.
When centrifugal blower 10 works, through air inlet 140 from axially into wind wheel 200, gas changes gas when flowing through wind wheel 200
Become radially, the inner wall of diversion shell 110 carries out water conservancy diversion to gas, until being blown out from air outlet 150.Due to diversion shell 110
Inner wall molded line be divergence line so that gas is when being subject to the inner wall water conservancy diversion of diversion shell 110, gradually outwards diverging, until go out
At air port 150.In such manner, it is possible to effectively improve outlet air efficiency, the work efficiency of centrifugal blower 10 is improved.
Further, air inlet 140 is in the bell shape that bore gradually increases from the inside to the outside, and air inlet 140 is outer
Circle periphery 141 has divergent section 1411, and the line style of divergent section 1411 is divergence line.In such manner, it is possible to increase intake volume, increase into
Gas effect, improves 10 efficiency of centrifugal blower, and suppresses the recycle stream towards suction side flowing in the end of wind wheel 200, improves
Pant sound, so as to reduce noise.
It should be appreciated that the outer ring periphery 141 of air inlet 140 is a complete end to end loop curve, the ring
Wherein one section of shape curve is divergent section 1411, and the line style of the divergent section 1411 is divergence line.In addition, the hair of the divergent section 1411
The divergence line of loose wire and the inner wall molded line of diversion shell 110 can be same type of divergence line or different types of
Divergence line, accordingly selects according to actual conditions.
Preferably, the divergence line of the outer ring periphery 141 of air inlet 140 can be involute or spiral of Archimedes.
Certainly, in the other embodiment of the utility model, the divergence line of the outer ring periphery 141 of air inlet 140 can also be other classes
The divergence line of type.
Preferably, in the present embodiment, the outer ring periphery 141 of air inlet 140 also has changeover portion 1412 and linkage section
1413.One end of changeover portion 1412 is connected with one end of divergent section 1411, and the other end is connected with one end of linkage section 1413, diverging
Section 1411 is gradually outwards dissipated by one end close to changeover portion 1412 away from one end of changeover portion 1412, and divergent section 1411 is remote
One end from changeover portion 1412 is connected with the one end of linkage section 1413 away from changeover portion 1412, divergent section 1411, changeover portion 1412
The outer ring periphery 141 to form end to end air inlet 140 is connected with 1413 three of linkage section.
In addition, preferably, the line style of changeover portion 1412 is circular arc so that the outer ring periphery 141 of air inlet 140 forms hair
Loose wire adds the line style of circular arc, can further increase intake volume, increases air inlet effect, improves 10 efficiency of centrifugal blower, reduces
Noise.
Preferably, in the present embodiment, one end of divergent section 1411 is set close to air outlet 150.Divergent section 1411 is by remote
The one end for separating out air port 150 is gradually outwards dissipated towards one end close to air outlet 150.
Further, first end 111 is laterally away from the direction of the second end 112 along one and is convexly equipped with extension 1111,
Air outlet 150 is arranged at extension 1111, and the lower end of extension 1111 tilts down setting so that air outlet 150 further expands
Greatly, and the lower end of extension 1111 is connected to form a choke 1112 with the side wall of diversion shell 110, and divergent section 1411 is by remote
The one end for separating out air port 150 is gradually outwards dissipated towards one end close to air outlet 150, until being terminated at the choke 1112.
In addition, please continue to refer to Fig. 1, centrifugal blower volute 100 further includes installing plate 160, which, which is sheathed on, prolongs
Outside extending portion 1111, multiple mounting holes 161 are provided with installing plate 160.
Please continue to refer to Fig. 4, preferably, in the present embodiment, one end of the divergence line of divergent section 1411 and diversion shell
Between the line of the axial line of the other end and diversion shell 110 of the line of 110 axial line and the divergence line of divergent section 1411
The angular range of angle be 90 °~300 °, further, the angle of the angle can be 120 °, 180 ° or 240 ° etc..When
So, the angle of the angle can also use other angles value, and it is preferably 90 °~300 ° that the present embodiment, which is only,.
In addition, the line style of the inner ring periphery 142 of air inlet 140 is circle.Add so as to form outer ring periphery 141 for divergence line
The line style of circular arc, inner ring periphery 142 are circular line style, increase air inlet effect, improve the efficiency of centrifugal blower 10, are made an uproar to reduction
Sound is favourable.
In conclusion the centrifugal blower volute 100 of the centrifugal blower 10 of air-conditioning provided in this embodiment, its air outlet 150
Place is longer along the length of 110 axis direction of diversion shell, can ensure that the wind that air outlet 150 is blown out is to dissipate, such outlet air
The blowing area of mouth 150 is wider, air-out effect is improved, so as to improve the heat exchange efficiency of the evaporator of air-conditioning.Also, use
V-shaped the first side plate 120 and the second side plate 130, further expands the blowing area of air outlet 150, there is provided outlet air is imitated
Fruit, improves the heat exchange efficiency of evaporator.In addition, employ the interior wall-shaped of the combining structure, i.e. diversion shell 110 of double divergence lines
The line style of the divergent section 1411 of the outer ring periphery 141 of line and air inlet 140 is divergence line, so can effectively increase suction
The air quantity of wind, improves the efficiency of centrifugal blower 10, and does not increase the complexity and design difficulty of mould, and dismounting is simple, non-
It is often reliable.In addition, air inlet 140 uses bell shape, also, the divergent section 1411 of the outer ring periphery 141 of air inlet 140
Line style is divergence line, can increase intake volume, and suppresses the recycle stream towards suction side flowing in the end of wind wheel 200,
Improve sound of panting, so as to reduce noise.In addition, the outer ring periphery 141 of air inlet 140 forms the line style that divergence line adds circular arc,
Intake volume can further be increased, increase air inlet effect, improve 10 efficiency of centrifugal blower, reduce noise.
In addition, it is necessary to illustrate, the centrifugal blower 10 in the present embodiment is applicable not only to air-conditioning, can also be applied to it
On his mechanical equipment.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the present invention, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on, should be included within the scope of protection of this utility model.
Claims (10)
- A kind of 1. centrifugal blower volute, it is characterised in that the diversion shell including tubular structure, the first side plate and the second side plate, The diversion shell is internally provided with accommodating cavity, the both sides of the diversion shell respectively with first side plate and described second Side plate connects, and air inlet is provided with first side plate and/or second side plate, and the air inlet connects with the accommodating cavity Logical, the diversion shell has the first end and the second end being oppositely arranged, and the first end is provided with air outlet, described The length of first end along the diversion shell axis direction is more than the second end along the diversion shell axis direction Length, the inner wall molded line of the diversion shell is divergence line.
- 2. centrifugal blower volute according to claim 1, it is characterised in that first side plate and/or second side Plate is to be obliquely installed.
- 3. centrifugal blower volute according to claim 2, it is characterised in that first side plate is close to the first end One end away from second side plate direction tilt.
- 4. centrifugal blower volute according to claim 2, it is characterised in that first side plate and the second side plate shape Forming V-shape, and first side plate is tilted close to direction of the one end of the first end away from second side plate, it is described Second side plate is tilted close to direction of the one end of the first end away from first side plate.
- 5. centrifugal blower volute according to claim 1, it is characterised in that first side plate and/or second side Plate is tablet, arc panel or divergence line plate.
- 6. centrifugal blower volute according to claim 1, it is characterised in that the divergence line is involute or A Ji meter Moral helix.
- 7. centrifugal blower volute according to claim 1, it is characterised in that the divergence line extends to the air outlet Place.
- 8. a kind of centrifugal blower, including wind wheel, it is characterised in that the centrifugal blower is further included such as any one of claim 1-7 The centrifugal blower volute, the wind wheel are placed in the accommodating cavity and can be rotated relative to the diversion shell.
- 9. centrifugal blower according to claim 8, it is characterised in that the wind wheel is two, and two wind wheels are parallel Set.
- 10. a kind of air-conditioning, it is characterised in that including centrifugal blower as claimed in claim 8 or 9.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201721352689.XU CN207278578U (en) | 2017-10-19 | 2017-10-19 | Centrifugal blower volute, centrifugal blower and air-conditioning |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN201721352689.XU CN207278578U (en) | 2017-10-19 | 2017-10-19 | Centrifugal blower volute, centrifugal blower and air-conditioning |
Publications (1)
Publication Number | Publication Date |
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CN207278578U true CN207278578U (en) | 2018-04-27 |
Family
ID=61979779
Family Applications (1)
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CN201721352689.XU Active CN207278578U (en) | 2017-10-19 | 2017-10-19 | Centrifugal blower volute, centrifugal blower and air-conditioning |
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2017
- 2017-10-19 CN CN201721352689.XU patent/CN207278578U/en active Active
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