CN209294130U - Centrifugal fan blade assembly, centrifugal fan and air conditioning unit - Google Patents
Centrifugal fan blade assembly, centrifugal fan and air conditioning unit Download PDFInfo
- Publication number
- CN209294130U CN209294130U CN201920026259.1U CN201920026259U CN209294130U CN 209294130 U CN209294130 U CN 209294130U CN 201920026259 U CN201920026259 U CN 201920026259U CN 209294130 U CN209294130 U CN 209294130U
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- wheel hub
- fan housing
- roof
- fixed ring
- fan
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- 238000004378 air conditioning Methods 0.000 title abstract description 3
- 238000005119 centrifugation Methods 0.000 claims abstract description 44
- 239000007787 solid Substances 0.000 claims abstract description 6
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 9
- 230000000712 assembly Effects 0.000 description 4
- 238000000429 assembly Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000005489 elastic deformation Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000005381 potential energy Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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Abstract
The utility model relates to a centrifugation fan blade subassembly, centrifugal fan and air conditioning unit, centrifugation fan blade subassembly include the fan blade and match the fan housing that connects to the fan blade, and the fan blade includes wheel hub, and wheel hub includes wheel hub main part and solid fixed ring, and solid fixed ring forms the shaft hole that is used for matching and connects the motor shaft, and the one end of wheel hub main part is connected the one end of solid fixed ring and is formed the motor that communicates the shaft hole and hold the chamber; the fan cover penetrates through the fixing ring and covers at least part of the hub main body; wherein, wheel hub main part sets up with solid fixed ring integrated into one piece, and fan housing and wheel hub main part rigid coupling. The centrifugal fan blade assembly is connected with the motor shaft through the shaft hole formed by the fixing ring in a matching mode, and the fixing ring and the hub main body are integrally formed and separated from the fan cover, so that the fan cover is independently installed on the hub main body to improve airflow operation and reduce noise, but cannot bear other external force, the impact strength of the centrifugal fan blade assembly is effectively improved, and the crushing rate of the centrifugal fan blade assembly is reduced.
Description
Technical field
The utility model relates to field of heat exchange equipment, more particularly to a kind of centrifugation blade component, centrifugal blower and air-conditioning
Unit.
Background technique
Centrifugal blower improves gas pressure and supplies gas side by side the machinery of body, use extensively as a kind of mechanical energy by input
In industrial production and sphere of life, centrifugal blower is converted to the principle of potential energy according to kinetic energy, using high-speed rotating impeller by gas
Body accelerates, slows down and changes flow direction, and kinetic energy is made to be converted into potential energy (pressure).Centrifugal blower mainly includes driving motor and installation
In the centrifugation blade of driving motor, centrifugation blade under the driving of driving motor high-speed rotation to convey gas.
Currently, situations such as centrifugation blade due to structure design defect, is easy to appear breakage in use.According to event
The simulation test of barrier, utility model people discovery, since the supporting part that centrifugation blade is sheathed on motor shaft fully relies on screw
It is fixed with positioning bar, and in process of production, to the fastening situation of screw, there are more uncontrollable factor (such as fixed spiral shells
Follow closely pneumatic screwdriver moment values are uncontrolled, mold injection molding when screw hole size is uncontrolled, the qualified or not uncontrolled, fixing screws of screw
It is uncontrolled, uncontrolled etc. for subjective control by artificial full inspection that there are no marking hidden danger), so that the structure for affecting centrifugation blade is strong
Degree, and then the job stability of centrifugation blade is affected, so that centrifugation blade is easy to produce breakage, reduces the use of centrifugal blower
Service life, and there are serious security risks.
Utility model content
Based on this, it is necessary to for centrifugation blade structural strength it is lower be easy to cause damaging problem, a kind of structure is provided
Higher centrifugation blade component, centrifugal blower and the air-conditioner set without cracky of intensity.
A kind of centrifugation blade component including fan blade and is coupled to the fan housing of the fan blade, and the fan blade includes wheel hub, described
Wheel hub includes hub body and fixed ring, and the stationary annular is at the axis hole for motor shaft to be coupled, and the one of the hub body
End connects one end of the fixed ring and forms the motor accommodating chamber for being connected to the axis hole；The fan housing passes through the fixed ring simultaneously
Cover at at least partly described hub body；
Wherein, the hub body and the fixed ring, which are integrally formed, is arranged, and the fan housing and the hub body are affixed.
Above-mentioned centrifugation blade component, by stationary annular at axis hole and motor shaft be coupled, and fixed ring and hub body
Be integrally formed and be separated from each other with fan housing, therefore fan housing it is separately installed in played on hub body improve air-flow operating to reduce
Noise, but not other external forces are born, therefore effectively increase the impact strength of centrifugation blade component, reduce centrifugation
The percentage of damage of fan blade component.
The hub body includes wheel hub roof and wheelboss side wall, wheel hub roof edge in one of the embodiments,
Circumferentially around one end of the fixed ring, the wheelboss side wall is from outside the wheel hub roof circumferentially along the central axis of the axis hole
Extend to the direction far from the fixed ring, the motor accommodating chamber is collectively formed in the wheel hub roof and the wheelboss side wall.
The fan housing includes fan housing roof and the circumferential same direction from outside the fan housing roof in one of the embodiments,
The fan housing side wall of extension, the fan housing roof offer and the matched connecting hole of the outer diameter of the fixed ring, the fan housing roof
The fixed ring is arranged in by the connecting hole and covers the wheel hub roof, and the fan housing side wall covering is at least partly described
Wheelboss side wall.
The fan housing roof and the wheel hub roof are affixed by fastener in one of the embodiments,.
The wheel hub roof offers the first fixation hole in one of the embodiments, the fan housing roof offer with
Matched second fixation hole of first fixation hole, the fastener pass through first fixation hole and second fixation hole with
Connect the wheel hub and the fan housing.
The wheel hub roof is also provided with location hole in one of the embodiments, and the fan housing roof is along the fan housing
The extending direction of side wall is convexly equipped with the positioning protrusion that can be limited in the positioning hole.
The fan blade in one of the embodiments, further include:
Annular bottom plate, the inside edge of the annular bottom plate and outside of the hub body far from described fixed ring one end
Edge connection；
Air supplying ring, interval are set to the annular bottom plate and connect the hub body side；And
Blade, multiple blades are circumferentially spaced to be set between the annular bottom plate and the air supplying ring.
A kind of centrifugal blower, including above-mentioned centrifugation blade component.
The centrifugal blower further includes motor in one of the embodiments, and the motor includes motor body and one end
The motor shaft of the motor body is stretched out, the centrifugation blade component is coupled to the motor shaft by the axis hole, described
Motor body is at least partially housed in the motor accommodating chamber of the centrifugation blade component.
A kind of air-conditioner set, including above-mentioned centrifugal blower.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the centrifugation blade component of an embodiment of the utility model；
Fig. 2 is the structural schematic diagram of the fan blade of centrifugation blade component shown in FIG. 1；
Fig. 3 is the structural schematic diagram of the fan housing of centrifugation blade component shown in FIG. 1；
Fig. 4 is the cross-sectional view of centrifugation blade component shown in FIG. 1；
Fig. 5 is the partial enlarged view at the A of centrifugation blade component shown in Fig. 4.
Specific embodiment
The utility model is more fully retouched below with reference to relevant drawings for the ease of understanding the utility model,
It states.The preferred embodiment of the utility model is given in attached drawing.But the utility model can come in many different forms in fact
It is existing, however it is not limited to embodiment described herein.On the contrary, purpose of providing these embodiments is makes public affairs to the utility model
The understanding for opening content is more thorough and comprehensive.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement are for illustrative purposes only.
Unless otherwise defined, all technical and scientific terms used herein are led with the technology for belonging to the utility model
The normally understood meaning of the technical staff in domain is identical.Terminology used in the description of the utility model herein only be
The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term " and or " used herein includes
Any and all combinations of one or more related listed items.
As shown in Figure 1, a kind of air-conditioner set (not shown) of an embodiment of the utility model, the air-conditioner set include from
Heart blower (not shown), centrifugal blower include motor (not shown) and the centrifugation blade component 100 for being coupled to motor, and motor includes
Motor body and one end stretch out the motor shaft of motor body, and centrifugation blade component 100 and motor shaft are coupled, and motor body can lead to
Motor shaft output torque is crossed to drive centrifugation blade component 100 to rotate, to drive the rotation of centrifugation blade component 100 to convey gas
It flows and changes air-flow velocity.
Following embodiment only to illustrate as example, is not limiting upon the technical scope of the application.It is appreciated that at it
In its embodiment, centrifugal blower is also mountable in other equipment, is not limited thereto.
As shown in Figure 1-Figure 3, centrifugation blade component 100 includes fan blade 20 and fan housing 40, and fan blade 20 can be in the band of motor shaft
Dynamic lower rotation plays the role of delivery air and changes air-flow velocity, and fan housing 40 is removably coupled to fan blade 20, for improving
Air-flow operating achievees the purpose that noise reduction.
As shown in Figures 2 and 4, specifically in some embodiments, fan blade 20 includes annular bottom plate 21, air supplying ring 23, blade
25 and wheel hub 27.
Wherein, annular bottom plate 21 is in hollow annular structure, and the inside edge of annular bottom plate 21 is connect with wheel hub 27.Into
Vane 23 is in hollow annular structure, and is spaced set on connection 27 side of wheel hub of annular bottom plate 21 and same with annular bottom plate 21
The heart, and the outer diameter of air supplying ring 23 matches (specifically in one embodiment, the outer diameter and ring of air supplying ring 23 with the outer diameter of annular bottom plate 21
The outer diameter of shape bottom plate 21 is equal).The inside edge of air supplying ring 23 is enclosed air inlet, the outer ledge and annular of air supplying ring 23
The air outlet being connected to air inlet is formed between the outer ledge of bottom plate 21.
Circumferentially uniform intervals are set between annular bottom plate 21 and air supplying ring 23 multiple blades 25, and all blades 25 are far from wheel
Blade outer circle, the outside of blade the outer circle orthographic projection on annular bottom plate 21 and annular bottom plate 21 is collectively formed in the outboard end of hub 27
Edge is overlapped, and blade inner circle is collectively formed close to the inner end of wheel hub 27 in all blades 25, and blade inner circle is on annular bottom plate 21
Orthographic projection is located on annular bottom plate 21.In this way, ambient atmos are involved in air supplying ring 23 and annular bottom plate 21 from air inlet by blade 25
Between, then flowed out by air outlet.
Wheel hub 27 is arranged concentrically with annular bottom plate 21, including hub body 272 and with hub body 272 be integrally formed be arranged
Fixed ring 274.Wherein, fixed ring 274 forms the axis hole 2741 for motor shaft to be coupled, one end connection of hub body 272
One end of fixed ring 274 simultaneously forms the motor accommodating chamber 2725 of connection axis hole 2741, and the other end of hub body 272 is to annular bottom
21 direction of plate extends to connect the inside edge of annular bottom plate 21.In this way, motor body can be contained in motor accommodating chamber 2725,
It is interior and affixed with fixed ring 274 that motor shaft is arranged in axis hole 2741, so that fan blade 20 be driven to rotate.
As shown in Fig. 2, Fig. 4 and Fig. 5, specifically in some embodiments, fixed ring 274 is in hollow annular structure with shape
At axis hole 2741, connection ring component 276 is arranged in axis hole 2741, motor shaft is inserted in connection ring assemblies 276 and passes through company
Ring assemblies 276 and fixed ring 274 are affixed, and motor shaft drives fixed ring 274 to rotate by connection ring assemblies 276, and then drive
Hub body 272 rotates.Specifically in one embodiment, connection ring assemblies 276 include the first connection ring 2761 and are sheathed on first
The second connection ring 2763 outside connection ring 2761, fixed ring 274 are sheathed on outside the second connection ring 2763.First connection ring 2761 tool
Have higher intensity and affixed with motor shaft, the second connection ring 2763 by having the material (such as rubber) of certain elasticity to be formed and
Tool can generate certain elastic deformation under external force.When slight vibration occurs for 25 unbalance stress of blade, the second connection ring
2763 can alleviate the slight vibration of fixed ring 274 using the elastic deformation of itself, avoid to the first connection ring 2761 and motor shaft
It impacts, the bonding strength of the first connection ring of damage 2761 and motor shaft.
Hub body 272 includes wheel hub roof 2721 and wheelboss side wall 2723.Wherein, wheel hub roof 2721 circumferentially surrounds
One end of fixed ring 274 and structure annular in shape, and wheel hub roof 2721 is perpendicular to the central axis of axis hole 2741.Wheelboss side wall
2723 circumferentially extend to annular bottom to the direction far from fixed ring 274 along the central axis of axis hole 2741 from outside wheel hub roof 2721
The inside edge of plate 21, and wheelboss side wall 2723 extends to form round table surface to the central axial direction inclination far from axis hole 2741,
Outer 2721 one end of the hub of fifth wheel without leave roof of wheelboss side wall 2723 is gradually increased to connection 21 one end of annular bottom plate, wheel hub roof
2721 the motor accommodating chamber 2725 for being connected to axis hole 2741 is collectively formed with wheelboss side wall 2723.It is appreciated that hub body 272
Shape is without being limited thereto, can be set as needed as different shapes.
Due to be formed on the wheelboss side wall 2723 of above-mentioned hub body 272 due to stripping process leave it is multiple circumferentially
Spaced fabrication hole 2723a, thus air-flow when flowing through wheelboss side wall 2723 can because fabrication hole 2723a there are due to generate one
Determine the noise of size, so, in order to eliminate the noise generated by fabrication hole 2723a, fan blade 20 further includes covering at hub body
272 fan housing 40, fan housing 40 pass through fixed ring 274 and cover at least partly hub body 272 and consolidate with hub body 272
It connects, fan housing 40 has covered fabrication hole 2723a, to eliminate the noise generated by fabrication hole 2723a.And due to centrifugation blade group
The axis hole 2741 and motor shaft that part 100 is formed by fixed ring 274 are coupled, and fixed ring 274 is set with the integrated molding of hub body 272
It sets and is separated from each other with fan housing 40, therefore fan housing 40 is individually fixed on hub body 272, improve air-flow operating playing to drop
It is not subject to other external forces while low noise, to effectively increase the impact strength of centrifugation blade component 100, drops
The low percentage of damage of centrifugation blade component 100.And in the prior art, fan housing 40 and fixed ring 274 are integrally formed and are arranged, therefore
Fan housing 40 is easy to happen rupture by the active force that fixed ring 274 is transmitted.
As shown in Fig. 2, Fig. 3 and Fig. 5, specifically in one embodiment, fan housing 40 includes fan housing roof 41 and from fan housing roof
The fan housing side wall 43 that circumferential same direction extends outside 41, the shape of fan housing roof 41 are matched with the shape of wheel hub roof 2721, wind
Cover roof 41 offer with the matched connecting hole 412 of the outer diameter of fixed ring 274, therefore fan housing roof 41 is worn by connecting hole 412
Set on fixed ring 274 and wheel hub roof 2721 is covered, fan housing side wall 43 is extended to form from the inclination of fan housing roof 41 and wheelboss side wall
2723 is matched round table-like, connects 2721 one end of wheel hub roof to cover at least wheelboss side wall 2723, and then be covered in hub side
On the fabrication hole 2723a of wall 2723.The outer surface of fan housing side wall 43 is smooth round table surface, therefore bootable airflow smooth flows through
Without generating noise.
Further, in some embodiments, fan housing roof 41 and wheel hub roof 2721 are affixed by fastener 60.Specifically
Ground, wheel hub roof 2721 are opened up there are three the first fixation hole 2721a, and fan housing roof 41 offers and the first fixation hole 2721a
Three the second fixation holes 414 matched, any one fastener 60 in three fasteners 60 (such as screw) are each passed through one
First fixation hole 2721a is with second fixation hole 414 to connect wheel hub 27 and fan housing 40.In this way, fan housing 40 is removably solid
It is connected to cover the fabrication hole 2723a on hub body 272 on hub body 272, even if occurring in which that a fastener 60 falls
The case where falling will not generate excessive influence on the stress of fan housing 40 and fan housing 40 is caused to rupture.And be different from the prior art,
Integrally formed fan housing 40 is fixed by multiple fasteners 60 with fixed ring 274, after one of fastener 60 falls off, holds very much
It is damaged due to unbalance stress under the action of extraneous impact force to easily lead to fan housing 40 and fixed ring 274.It is appreciated that first is fixed
Hole 2721a and the quantity of the second fixation hole 414 are unlimited, can be set as needed.
In one embodiment, wheel hub roof 2721 is also provided with three location holes, and each location hole is respectively positioned on two first
Between fixation hole 2721a, along the extending direction projection of fan housing side wall 43, there are three can be limited in positioning hole to fan housing roof 41
Positioning protrusion (not shown).In this way, fan housing 40 and wheel hub 27 realize that installation is fixed by the mutual cooperation of positioning protrusion and location hole
Position, to improve the assembling speed of fan housing 40.It is appreciated that the quantity and shape of positioning protrusion and location hole are unlimited, it can root
According to needing to be arranged.
Above-mentioned centrifugation blade component 100, centrifugal blower and air-conditioner set, due to the fixed ring 274 for motor shaft to be coupled
It is integrally formed and is arranged with hub body 272, fixed ring 274 and fan housing 40 do not have direct connection relational, therefore fan housing 40 is only used for
Hub body 272 is provide with to reduce noise, without bearing other active forces, so as to avoid integrated molding in the prior art
Fixed ring 274 be broken with fan housing 40.Moreover, because for fixing the fastener 60 of fan housing 40 without being subjected to extention effect
Power, therefore the fastening requirements of screw are reduced, reduce Production and quality control cost.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (10)
1. a kind of centrifugation blade component (100), which is characterized in that including fan blade (20) and be coupled to the fan housings of the fan blade (20)
(40), the fan blade (20) includes wheel hub (27), and the wheel hub (27) includes hub body (272) and fixed ring (274), described
Fixed ring (274) forms the axis hole (2741) for motor shaft to be coupled, and one end of the hub body (272) connects the fixation
One end of ring (274) simultaneously forms the motor accommodating chamber (2725) for being connected to the axis hole (2741)；The fan housing (40) passes through described
Fixed ring (274) simultaneously covers at at least partly described hub body (272)；
Wherein, the hub body (272) and the fixed ring (274), which are integrally formed, is arranged, the fan housing (40) and the wheel
Hub main body (272) is affixed.
2. centrifugation blade component (100) according to claim 1, which is characterized in that the hub body (272) includes wheel
Hub roof (2721) and wheelboss side wall (2723), the wheel hub roof (2721) circumferentially surround the one of the fixed ring (274)
End, the wheelboss side wall (2723) from the wheel hub roof (2721) outside the circumferential central axis along the axis hole (2741) to remote
Direction from the fixed ring (274) extends, and institute is collectively formed in the wheel hub roof (2721) and the wheelboss side wall (2723)
State motor accommodating chamber (2725).
3. centrifugation blade component (100) according to claim 2, which is characterized in that the fan housing (40) includes fan housing top
Wall (41) and from the fan housing roof (41) the fan housing side wall (43) that circumferential same direction extends outside, the fan housing roof (41) is opened
Equipped with the matched connecting hole of outer diameter (412) with the fixed ring (274), the fan housing roof (41) passes through the connecting hole
(412) it is arranged in the fixed ring (274) and covers the wheel hub roof (2721), fan housing side wall (43) covering at least portion
Divide the wheelboss side wall (2723).
4. centrifugation blade component (100) according to claim 3, which is characterized in that the fan housing roof (41) with it is described
Wheel hub roof (2721) is affixed by fastener (60).
5. centrifugation blade component (100) according to claim 4, which is characterized in that the wheel hub roof (2721) opens up
Have the first fixation hole (2721a), the fan housing roof (41) offers solid with first fixation hole (2721a) matched second
Determine hole (414), the fastener (60) passes through first fixation hole (2721a) with second fixation hole (414) to connect
The wheel hub (27) and the fan housing (40).
6. centrifugation blade component (100) according to claim 3, which is characterized in that the wheel hub roof (2721) is also opened
Equipped with location hole, the fan housing roof (41) is convexly equipped with along the extending direction of the fan housing side wall (43) can be limited in the positioning
Positioning protrusion in hole.
7. centrifugation blade component (100) according to claim 1, which is characterized in that the fan blade (20) further include:
Annular bottom plate (21), the inside edge and the hub body (272) of the annular bottom plate (21) are far from the fixed ring
(274) the outer ledge connection of one end；
Air supplying ring (23), interval are set to the annular bottom plate (21) and connect hub body (272) side；And
Blade (25), multiple blades (25) are circumferentially spaced be set to the annular bottom plate (21) and the air supplying ring (23) it
Between.
8. a kind of centrifugal blower, which is characterized in that including the centrifugation blade component as described in claim 1-7 any one
(100)。
9. centrifugal blower according to claim 8, which is characterized in that the centrifugal blower further includes motor, the motor
The motor shaft of the motor body is stretched out including motor body and one end, centrifugation blade (20) component (100) passes through institute
It states axis hole (2741) and is coupled to the motor shaft, the motor body is at least partially housed in the centrifugation blade component (100)
The motor accommodating chamber (2725) in.
10. a kind of air-conditioner set, which is characterized in that including the centrifugal blower as described in claim 8-9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920026259.1U CN209294130U (en) | 2019-01-03 | 2019-01-03 | Centrifugal fan blade assembly, centrifugal fan and air conditioning unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920026259.1U CN209294130U (en) | 2019-01-03 | 2019-01-03 | Centrifugal fan blade assembly, centrifugal fan and air conditioning unit |
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| Publication Number | Publication Date |
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| CN209294130U true CN209294130U (en) | 2019-08-23 |
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| CN201920026259.1U Active CN209294130U (en) | 2019-01-03 | 2019-01-03 | Centrifugal fan blade assembly, centrifugal fan and air conditioning unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538531A (en) * | 2019-01-03 | 2019-03-29 | 格力电器（合肥）有限公司 | Centrifugal fan blade assembly, centrifugal fan and air conditioning unit |
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2019
- 2019-01-03 CN CN201920026259.1U patent/CN209294130U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538531A (en) * | 2019-01-03 | 2019-03-29 | 格力电器（合肥）有限公司 | Centrifugal fan blade assembly, centrifugal fan and air conditioning unit |
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