CN104154035B - Centrifugal fan and there is its air conditioner - Google Patents
Centrifugal fan and there is its air conditioner Download PDFInfo
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- CN104154035B CN104154035B CN201410439044.4A CN201410439044A CN104154035B CN 104154035 B CN104154035 B CN 104154035B CN 201410439044 A CN201410439044 A CN 201410439044A CN 104154035 B CN104154035 B CN 104154035B
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Abstract
The invention provides a kind of centrifugal fan and there is its air conditioner, wherein, centrifugal fan includes：Wheel hub (10)；Chassis (20), it is set on wheel hub (10)；Blade (30), to be multiple, multiple blades (30) are arranged on chassis (20) and are circumferentially disposed at the outside of wheel hub (10)；Blade (30) includes away from wheel hub (10) and stretches out the edge section of chassis (20), edge section includes first surface (31) and the second surface (32) being oppositely arranged with first surface (31), first surface (31) forms back pressure face, second surface (32) forms pressure face, wherein, there is the first concaveconvex structure for being used for weakening vortex on first surface (31).Technical scheme efficiently solve centrifugal fan in the prior art noise it is big the problem of.
Description
Technical field
The present invention relates to air-conditioning technical field, in particular to a kind of centrifugal fan and has its air conditioner.
Background technology
In recent years, as pursuit of the people to quality of the life, user are higher to the noise requirements of air-conditioning system, particularly room
Interior air conditioner ventilation field.Blower fan is unique air interchanger in air conditioner ventilation equipment, blower fan companion while energy conversion is realized
With the generation of aerodynamic noise.Main noise source in blower fan system is aerodynamic noise.Centrifugal fan is one in blower fan
Kind, the operation principle of centrifugal fan is：Air-flow sucks from the axial direction of centrifugal fan, in the presence of centrifugation, air-flow from from
Core type blower fan radially flows out.In the prior art, as shown in figure 1, centrifugal fan include wheel hub 1, chassis 2, multiple blades 3 with
And panel 4, chassis 2 are set on wheel hub 1, multiple blades 3 are arranged on chassis 2, and the lid of cover plate 4 is located on multiple blades 3, cover plate
4 have air inlet through hollow shaft mouth.Blade 3 includes first surface and the second surface being oppositely arranged with first surface, and first surface is formed
Back pressure face, second surface form pressure face.When the blades rotate at high speed, due to the viscous effect of gas, on the surface of blade
The speed of air-flow is 0, and in blade very little distance range, air velocity gradient is very big, in the easy shape of back pressure face of blade
It is vortexed into boundary-layer, noise can be produced by being vortexed when coming off blade, the eddy current crack on blade is big, and then causes centrifugal fan
Noise is big.
The content of the invention
The present invention is intended to provide a kind of centrifugal fan and there is its air conditioner, to solve centrifugal wind in the prior art
The problem of noise of machine is big.
To achieve these goals, according to an aspect of the invention, there is provided a kind of centrifugal fan, including：Wheel hub；
Chassis, it is set on wheel hub；Blade, to be multiple, multiple blades are arranged on chassis and are circumferentially disposed at the outside of wheel hub；Leaf
Piece includes away from wheel hub and stretches out the edge section on chassis, and edge section includes first surface and be oppositely arranged with first surface second
Surface, first surface form back pressure face, and second surface forms pressure face, wherein, have on first surface and be used to weaken vortex
First concaveconvex structure.
Further, the first concaveconvex structure includes the first concave-arc part for being connected and the first convex arc section, the first concave-arc part and
First convex arc section extends along the bearing of trend of blade, and the first convex arc section is set relative to the first concave-arc part away from chassis.
Further, there is the second concaveconvex structure on second surface.
Further, the second concaveconvex structure includes the second concave-arc part for being connected and the second convex arc section, the second concave-arc part and
Second convex arc section extends along the bearing of trend of blade, and the second concave-arc part is correspondingly arranged with the first convex arc section, the second convex arc section and
First concave-arc part is correspondingly arranged.
Further, the cross sectional shape of edge section is S-shaped.
Further, first surface has A end points, B end points, C-terminal point and D end points, and B end points is located at and bottom with C-terminal point
In the parallel plane in the surface of disk, the subpoint of A end points in the plane is P points, and the subpoint of D end points in the plane is C-terminal point,
The angle of the line between line and B end points and C-terminal point between P points and C-terminal point is edge section inclination angleEdge section tilts
AngleIn the range of 1 ° to 10 °.
Further, two end points of the treble bearing of trend along blade of the first convex arc section on the first surface
For E end points and F end points, subpoint of the E end points in the plane that A end points, B end points and F end points are limited is G point, G points and F
The angle of the line between line and E end points and F end points between end points is adjustment angle θ, and adjustment angle θ is at 0.5 ° to 5 °
In the range of.
Further, centrifugal fan also includes the cover plate that lid is located on multiple blades, and cover plate has air inlet through hollow shaft mouth.
According to another aspect of the present invention, there is provided a kind of air conditioner, including centrifugal fan, centrifugal fan are above-mentioned
Centrifugal fan.
Applying the technical scheme of the present invention, centrifugal fan includes wheel hub, chassis and blade, and chassis is set on wheel hub,
Blade is multiple, and multiple blades are arranged on chassis and are circumferentially disposed at the outside of wheel hub.Axle of the air-flow from centrifugal fan
To suction, under the rotation situation of wheel hub, air-flow flows out from the space between two adjacent blades.Said structure can be protected
Demonstrate,prove the normal operation of centrifugal fan.When centrifugal fan works, in the presence of different airflow directions, in the back pressure of blade
Face produces boundary-layer, that is, produces vortex, then produces vortex break-off.Blade includes away from wheel hub and stretches out the edge on chassis
Section, edge section include first surface and the second surface being oppositely arranged with first surface, and first surface forms back pressure face, the second table
Face forms pressure face, wherein, there is the first concaveconvex structure for being used for weakening vortex on first surface.Due to the first concaveconvex structure
Convex portion structure is similar with the principle of peripheral flow, and convex portion structure can influence the generation of vortex.Such first concaveconvex structure can be with
The flow direction of the air-flow in back pressure face is controlled, and then the recess of the first concaveconvex structure can be with the disengaging of controlled vortex flow, so as to control back pressure
The noise that comes off of boundary-layer vortex in face, effectively reduces eddy current crack, so reduce centrifugal fan rotational noise and
The noise total value of centrifugal fan.
Brief description of the drawings
The Figure of description for forming the part of the application is used for providing a further understanding of the present invention, and of the invention shows
Meaning property embodiment and its illustrate be used for explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 shows the dimensional structure diagram of centrifugal fan of the prior art；
Fig. 2 shows the dimensional structure diagram of the embodiment of the centrifugal fan according to the present invention；
Fig. 3 shows the part-structure schematic diagram of Fig. 2 centrifugal fan；And
Fig. 4 shows the structural representation of the edge section of the blade of Fig. 2 centrifugal fan.
Above-mentioned accompanying drawing marks including the following drawings：
1st, wheel hub；2nd, chassis；3rd, blade；4th, cover plate；10th, wheel hub；20th, chassis；30th, blade；31st, first surface；32nd,
Two surfaces；40th, cover plate.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
As shown in Figures 2 and 3, the centrifugal fan of the present embodiment includes wheel hub 10, chassis 20 and blade 30,20 sets of chassis
It is located on wheel hub 10, blade 30 is multiple, and multiple blades 30 are arranged on chassis 20 and are circumferentially disposed at the outside of wheel hub 10,
Blade 30 include away from wheel hub 10 and stretch out chassis 20 edge section, edge section include first surface 31 and with the phase of first surface 31
To the second surface 32 of setting, first surface 31 forms back pressure face, and second surface 32 forms pressure face, wherein, first surface 31
Upper the first concaveconvex structure with for weakening vortex.
Using the centrifugal fan of the present embodiment, centrifugal fan includes wheel hub 10, chassis 20 and blade 30,20 sets of chassis
It is located on wheel hub 10, blade 30 is multiple, and multiple blades 30 are arranged on chassis 20 and are circumferentially disposed at the outside of wheel hub 10.
Air-flow sucks from the axial direction of centrifugal fan, and under the rotation situation of wheel hub 10, air-flow is between two adjacent blades 30
Flowed out in space.Said structure can ensure the normal operation of centrifugal fan.When centrifugal fan works, in different air-flows
In the presence of direction, boundary-layer is produced in the back pressure face of blade 30, that is, produces vortex, then produce vortex break-off.Blade
30 include away from wheel hub 10 and stretch out the edge section on chassis 20, and edge section includes first surface 31 and set relatively with first surface 31
The second surface 32 put, first surface 31 form back pressure face, and second surface 32 forms pressure face, wherein, have on first surface 31
There is the first concaveconvex structure for weakening vortex.Because the convex portion structure of the first concaveconvex structure is similar with the principle of peripheral flow,
Convex portion structure can influence the generation of vortex.Such first concaveconvex structure can control the flow direction of the air-flow in back pressure face, Jin Er
The recess of one concaveconvex structure can be with the disengaging of controlled vortex flow, so as to control the noise that the boundary-layer in back pressure face vortex comes off, effectively
Ground reduces eddy current crack, and then reduces the rotational noise of centrifugal fan and the noise total value of centrifugal fan.
The principle of peripheral flow is：It is different according to the shape of barrier when air-flow breaks the barriers, can be in barrier
Lee face produces various forms of vortex shedding phenomenons.Using the centrifugal fan of the present embodiment, pass through multiple blades in air-flow
During, vortex break-off can be produced in blade outer fringe position, because vortex is three-dimensional structure, first surface 31 is arranged to
After concaveconvex structure so that three-dimensional eddy current is being not easily formed on the direction on chassis 20, is directly suppressing vortex from source
Produce, so as to reduce the caused eddy current crack of blade 30 itself, be effectively reduced noise total value.
In the present embodiment, the first concaveconvex structure includes the first concave-arc part and the first convex arc section being connected, the first concave arc
Portion and the first convex arc section extend along the bearing of trend of blade 30, and the first convex arc section is set relative to the first concave-arc part away from chassis 20
Put.First convex arc section can influence the generation of vortex, and the first concave-arc part can efficiently control the disengaging of vortex, be effectively reduced
The noise that comes off of boundary-layer vortex vortex in back pressure face, and then it is effectively reduced the rotational noise of centrifugal fan and centrifugal
The noise total value of blower fan.The structure of first concave-arc part and the first convex arc section is simple, easy to process.
In the present embodiment, there is the second concaveconvex structure on second surface 32.In the present embodiment, the second concaveconvex structure bag
The second concave-arc part being connected and the second convex arc section are included, the second concave-arc part and the second convex arc section are prolonged along the bearing of trend of blade 30
Stretch, the second concave-arc part is correspondingly arranged with the first convex arc section, and the second convex arc section is correspondingly arranged with the first concave-arc part.
In the present embodiment, the cross sectional shape of edge section is S-shaped.The edge section of S-shaped can influence the three of the trailing edge of blade 30
The generation of vortex is tieed up, may cannot be formed or can not be formed in edge section and be formed continuously very big vortex, so as to reduce whirlpool
Flow noise.The edge section of S-shaped is simple in construction, easy to process.During air-flow is by multiple blades, in blade outer fringe position
Vortex break-off can be produced, because vortex is three-dimensional structure, after the outer rim segment of blade is designed as into S types so that hanging down
Directly in being not easily formed three-dimensional eddy current on the direction on chassis 20, directly suppress the generation of vortex from source, so as to reduce blade 30
Eddy current crack caused by itself, is effectively reduced noise total value.
As shown in figure 4, in the present embodiment, first surface 31 has A end points, B end points, C-terminal point and D end points, B end points
It is located at C-terminal point in the plane parallel with the surface on chassis 20, the subpoint of A end points in the plane is P points, and D end points is in plane
On subpoint be C-terminal point, the angle of the line between line and B end points and C-terminal point between P points and C-terminal point is edge section
Inclination angleEdge section inclination angleIn the range of 1 ° to 10 °.Edge section inclination angleSize and blade 30 edge section
Length it is relevant, the length of the edge section of blade 30 is longer, edge section inclination angleIt is bigger, wherein, the edge section of blade 30
Length refers to the distance between B end points and C-terminal point.In the present embodiment, the highest of the first convex arc section on first surface 31
Two end points of the bearing of trend along blade 30 in portion are E end points and F end points, and E end points is in A end points, B end points and F end points institute
The subpoint in plane limited is G point, the angle of the line between line and E end points and F end points between G points and F end points
For adjustment angle θ, adjustment angle θ is in the range of 0.5 ° to 5 °.Adjustment angle θ size and the width of the edge section of blade 30
Relevant, the width of the edge section of blade 30 is wider, and adjustment angle θ is bigger, wherein, the width of the edge section of blade 30 refers to A ends
The distance between point and B end points.Edge section inclination angleThe according to the edge section of blade 30 is needed with adjustment angle θ size
Depending on the width of one end.In the present embodiment, the width of first end is 20mm.Edge section inclination angleWith adjustment angle θ angle
Degree is not easy excessive, and such leaf curling is serious, edge section inclination angleIt is not easy to adjustment angle θ angle too small, so subtracts
The DeGrain of small eddy current crack.
In the present embodiment, centrifugal fan also includes the cover plate 40 that lid is located on multiple blades 30, and cover plate 40 has axle
To air inlet.Cover plate 40 can control the vortex of the side on the remote chassis 20 of blade 30, can so avoid complex leaf
Processing.In high rotating speed, it is big to be not provided with the centrifugal fan noise of cover plate 40, and cover plate 40 can reduce eddy current crack, and then drop
The noise total value of low centrifugal fan.
The application also provides a kind of air conditioner, includes centrifugation according to the embodiment of the air conditioner (not shown) of the application
Formula blower fan, centrifugal fan are above-mentioned centrifugal fan.Due to the convex portion structure of the first concaveconvex structure and the original of peripheral flow
Manage it is similar, convex portion structure can influence vortex generation.Such first concaveconvex structure can control the flow direction of the air-flow in back pressure face,
And then first the recess of concaveconvex structure can be with the disengaging of controlled vortex flow, so as to control what the boundary-layer in back pressure face vortex came off to make an uproar
Sound, effectively reduce eddy current crack, and then reduce the rotational noise of centrifugal fan and the noise total value of centrifugal fan.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (7)
1. a kind of centrifugal fan, including：
Wheel hub (10)；
Chassis (20), it is set on the wheel hub (10)；
Blade (30), to be multiple, multiple blades (30) are arranged on the chassis (20) and are circumferentially disposed at the wheel
The outside of hub (10)；
Characterized in that,
The blade (30) includes away from the wheel hub (10) and stretches out the edge section of the chassis (20), and the edge section includes
First surface (31) and the second surface (32) being oppositely arranged with the first surface (31), the first surface (31) form the back of the body
Pressure surface, the second surface (32) form pressure face, wherein, have on the first surface (31) and be used to weaken the first of vortex
Concaveconvex structure, the cross sectional shape of the edge section is S-shaped；
First concaveconvex structure includes the first concave-arc part for being connected and the first convex arc section, first concave-arc part and described the
One convex arc section extends along the bearing of trend of the blade (30), and first convex arc section is remote relative to first concave-arc part
The chassis (20) is set.
2. centrifugal fan according to claim 1, it is characterised in that there are the second bumps on the second surface (32)
Structure.
3. centrifugal fan according to claim 2, it is characterised in that second concaveconvex structure includes the to be connected
Two concave-arc parts and the second convex arc section, second concave-arc part and second convex arc section are along the bearing of trend of the blade (30)
Extension, second concave-arc part are correspondingly arranged with first convex arc section, second convex arc section and first concave-arc part pair
It should set.
4. centrifugal fan according to claim 1, it is characterised in that the first surface (31) has A end points, B ends
Point, C-terminal point and D end points, the B end points are located in the plane parallel with the surface of the chassis (20) with the C-terminal point, institute
It is P points to state the subpoint of A end points on the plane, and the subpoint of the D end points on the plane is the C-terminal point, institute
The angle for stating the line between the line between P points and C-terminal point and the B end points and C-terminal point is that edge section tilts
AngleThe edge section inclination angleIn the range of 1 ° to 10 °.
5. centrifugal fan according to claim 4, it is characterised in that described first on the first surface (31)
Two end points of the treble bearing of trend along the blade (30) of convex arc section are E end points and F end points, and the E end points exists
The subpoint in plane that the A end points, the B end points and the F end points are limited is G point, the G points and the F ends
The angle of the line between line and the E end points and the F end points between point is adjustment angle θ, and the adjustment angle θ exists
In the range of 0.5 ° to 5 °.
6. centrifugal fan according to claim 1, it is characterised in that the centrifugal fan is also located at multiple including lid
Cover plate (40) on the blade (30), the cover plate (40) have air inlet through hollow shaft mouth.
7. a kind of air conditioner, including centrifugal fan, it is characterised in that the centrifugal fan is any in claim 1 to 6
Centrifugal fan described in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410439044.4A CN104154035B (en) | 2014-08-29 | 2014-08-29 | Centrifugal fan and there is its air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410439044.4A CN104154035B (en) | 2014-08-29 | 2014-08-29 | Centrifugal fan and there is its air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104154035A CN104154035A (en) | 2014-11-19 |
| CN104154035B true CN104154035B (en) | 2017-11-14 |
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ID=51879626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410439044.4A Active CN104154035B (en) | 2014-08-29 | 2014-08-29 | Centrifugal fan and there is its air conditioner |
Country Status (1)
| Country | Link |
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| CN (1) | CN104154035B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018232838A1 (en) * | 2017-06-23 | 2018-12-27 | 广东美的制冷设备有限公司 | Wind wheel, fan and refrigeration equipment |
| CN110566500A (en) * | 2019-10-12 | 2019-12-13 | 浙江科贸智能机电股份有限公司 | Impeller of centrifugal ventilator |
| CN112128120B (en) * | 2020-09-17 | 2022-08-23 | 青岛海信日立空调系统有限公司 | Ultra-thin indoor unit |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3649157B2 (en) * | 2001-06-06 | 2005-05-18 | ダイキン工業株式会社 | Centrifugal fan and air conditioner equipped with the centrifugal fan |
| JP3960776B2 (en) * | 2001-11-09 | 2007-08-15 | 松下電器産業株式会社 | Blower impeller for air conditioning |
| JP4432474B2 (en) * | 2003-11-27 | 2010-03-17 | ダイキン工業株式会社 | Centrifugal blower impeller and centrifugal blower provided with the impeller |
| CN204025149U (en) * | 2014-08-29 | 2014-12-17 | 珠海格力电器股份有限公司 | Centrifugal fan and there is its air conditioner |
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2014
- 2014-08-29 CN CN201410439044.4A patent/CN104154035B/en active Active
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| Publication number | Publication date |
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| CN104154035A (en) | 2014-11-19 |
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