Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of not making creative work
Embodiment, broadly falls into the scope of protection of the invention.
In describing the invention it is to be understood that term " " center ", " on ", D score, "front", "rear", " left ",
The orientation of instruction such as " right ", " vertical ", " level ", " top ", " bottom ", " interior ", " outward " or position relationship are based on shown in the drawings
Orientation or position relationship, be for only for ease of description the present invention and simplify description, rather than instruction or hint indication device or
Element must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.
Centrifugal blower includes impeller and spiral case, and wherein, impeller is the important composition part of centrifugal blower, including wheel hub and
It is arranged at the blade group of wheel hub side, one end of wheel hub is connected with motor, rotated by motor belt motor movable vane piece group, will be from centrifugation wind
The air-flow that machine air inlet enters in blower fan is radially sent by impeller.For ensureing normal air-supply, need in blower fan and overcome pipe
The static pressure of net resistance and the dynamic pressure that gaseous fluid is transferred out, static pressure and dynamic pressure sum are referred to as the total head of blower fan.
With reference to Fig. 1～3, the centrifugal blower 1 of the embodiment of the present invention, including impeller 2, impeller 2 includes wheel hub 21 and setting
In the blade group 22 of wheel hub 21 side, wheel hub 21 is connected with motor, this blade group include multiple along the of the arrangement of wheel hub 21 edge
One blade 221, two neighboring first blade 221 is equipped with least one second blade 222, along radial direction second blade of impeller 2
222 length is less than the length of the first blade 221.
Centrifugal blower 1 provided in an embodiment of the present invention, with respect to prior art, two adjacent the first blades 221 it
Between be provided with least one second blade 222, the second blade 222 can by the fluid partitioning of the first blade 221 suction surface near exit,
And the wake zone in impeller 2 exit is smashed, diminishes, improve the pressure of impeller outer edge air-flow, reduce air-flow and lead in impeller
Wind loss in road, thus improve centrifugal blower total head and efficiency.
Additionally, the first blade 221 is identical with the shape of the second blade 222, the first blade 221 volume is V1, the second blade
222 volume is V2If it is contemplated that volume V of the second blade 2222More than 2V1/ 3, the space in impeller can be led to less, so
The passage of airflow is narrow and can increase power consumption；If volume V of the second blade 2222Less than V1/ 3 it is impossible to stop mental retardation stream
Volume combinate form becomes wake zone, and air output is little, therefore, V in the embodiment of the present invention2Span be V1/ 3～2V1/ 3, and
Preferably, in one embodiment of the present of invention the second blade 222 volume V2=4V1/ 9, compound big and small blade can improve air-supply away from
From the noise of minimizing blower fan.
Further, the external diameter of impeller 2 is D, and internal diameter is d, if d/D is more than 0.6, that is, along impeller 2 radially the first blade 221
Length less, the air output of centrifugal blower is little；If d/D is less than 0.4, that is, along impeller 2 radially the first blade 221 length relatively
Greatly, the power consumption of blower fan can be increased, and noise is also larger, therefore, in the embodiment of the present invention span of impeller d/D be 0.4～
0.6 it is preferable that d/D adopts 0.55, you can ensure air output larger, and power consumption and noise also less.
Additionally, the established angle of impeller blade the wind field in centrifugal blower is also affected larger, in the embodiment of the present invention
The exit installation angle A of one blade 221 is equal with the exit installation angle B of the second blade 222, it is to avoid the first blade 221 and the second leaf
The exit installation angle of piece 222 is different, and vortex in blade passage；If the exit installation angle A of the first blade 221 is less than
20 °, the air-out of blower fan is less efficient；If the exit installation angle A of the first blade 221 is more than 50 °, the first blade 221 is to air-flow
Hinder larger, lead to produce vortex in the first blade 221 at the air-out edge of impeller passage, thus affecting air-out, therefore, this
The span of the exit installation angle A of inventive embodiments the first blade 221 is 20 °～50 °.Additionally, further, the present invention is real
Apply example the first blade 221 exit installation angle A adopt 30 °, as shown in Fig. 2 both can ensure that blower fan air-out efficiency higher, and
Avoid producing vortex at the air-out edge of impeller passage.
Further, in the embodiment of the present invention, the second blade 222 between two neighboring first blade 221 is multiple and number
Amount is equal, and multiple second blade 222 interval is uniformly arranged between two neighboring first blade 221, it is to avoid gas on blade
The skewness of stream, leads to loss in impeller passage for the air-flow larger, affects air-out.
If installing the second more blade 222 in view of on impeller, the spacing between adjacent two blades is too small, and air is along leaf
The resistance that piece is subject to when flowing out is larger, is unfavorable for air-out；If the quantity of the second blade 222 is less, between adjacent two blades
Spacing is excessive, and blade with the suction producing in wheel hub 21 rotation process less, affects the intake of centrifugal blower.Therefore, this
The quantity of the first blade 221 of bright embodiment and the second blade 222 is equal, and the quantitative range of the first blade 221 is 9～15
Individual, especially, the quantity of the first blade 221 in the embodiment of the present invention is 11, as shown in Figure 2 and Figure 4, can prevent above-mentioned asking
Topic produce, and ensure blower fan efficiency higher.
In order to accelerate the intake velocity of centrifugal blower, in the embodiment of the present invention, the first blade is away from the axle center one of centrifugal blower
Hold the outer end for the first blade, the corner near centrifugal blower inlet side is formed with chamfering 2211 in the outer end of the first blade,
As shown in Figure 3.This bootable air-flow of chamfering 2211 enters in blower fan along impeller 2 axial direction, reduces centrifugal blower air intake resistance,
Thus improving the intake velocity of centrifugal blower.
The embodiment of the present invention also includes a kind of indoor apparatus of air conditioner, including housing 3, is provided with air channel 4, housing 3 is opened in housing 3
It is provided with air inlet and air outlet, air inlet is all connected with air channel 4 with air outlet, above-mentioned centrifugal blower is installed in air channel 4, such as
Shown in Fig. 5～8, due to each reality of the centrifugal blower of installation and above-mentioned centrifugal blower in the indoor apparatus of air conditioner of the embodiment of the present invention
Apply the centrifugal fan structure providing in example identical, therefore the two can solve the problem that identical technical problem, and reach identical expection
Specifically, centrifugal blower 1 is fixed on housing 3, air inlet is relative with the inlet side of centrifugal blower 1, air-out
Mouth is arranged at the radial direction of centrifugal blower 1, air channel 4 part relative with centrifugal blower 1 side along centrifugal blower 1 air intake direction by
Taper contracting, more air can be imported near impeller 2 interior side along air channel 4, therefore, can improve close at air-conditioner air outlet
The air quantity of impeller 2 interior side of centrifugal blower 1, makes the air-out of air outlet more uniform.
Further, the impeller 2 of centrifugal blower 1 near centrifugal blower 1 inlet side one end with diameter greater than impeller 2 away from from
The diameter of heart-wind syndrome machine 1 inlet side one end, impeller 2 is not isometrical, and the diameter of impeller 2 is gradually reduced along air intake direction, said structure
Can shorten and flow out blade near the time of impeller edge side trailing edge along the air-flow away from centrifugal blower 1 inlet side, and then improve
Go out wind velocity, so that the air-out of air outlet is more uniform inside the impeller.
The centrifugal blower 1 of the embodiment of the present invention is installed on the first side wall 31 of housing 3, with reference to Fig. 4 and Fig. 8, centrifugal blower 1
Be installed on the first side wall 31 of housing 3, the impeller of centrifugal blower 1 away from inlet side cover plate be impeller back shroud, this bonnet
Plate is relative with the first side wall 31, and air channel 4 is connected with the first side wall 31, and the angle between air channel 4 and the first side wall 31 is α, and first
The one end in the axle center away from centrifugal blower 1 for the blade 221 is the outer end of blade, the outer end wall of the first blade 221 and centrifugal blower 1
Back shroud of impeller between angle be β, and β=α.So the contraction air channel 4 of design and the impeller outer end of centrifugal blower 1 tilt
Structure, both angles of inclination are equal, prevent air-flow from producing vortex in flow process, and make air-flow pass through centrifugal blower
Very fast from the air velocity of air outlet outflow after 1, by changing the blow-off direction of air-flow so that the air-out of air outlet is more uniform.
If additionally, the angle α between air channel 4 and the first side wall 31 is less than 90 °, will be directed inside the impeller of centrifugal blower 1
Gas less, the air-out of air outlet inequality problem cannot be improved；If the angle α between air channel 4 and the first side wall 31 is big
In 110 °, the radial dimension in air channel 4 is larger, can increase the volume of indoor apparatus of air conditioner, it is therefore preferred that the embodiment of the present invention
Air channel 4 and the first side wall 31 between the scope of angle α be 90 °～110 °, and preferably, angle α is 100 °.
In indoor apparatus of air conditioner, the top board of housing 3 and base plate are respectively provided with air outlet, and air outlet is provided with wind deflector, goes out up and down
Air port all can air-out.Rise in view of hot-air, cold air declines, the indoor apparatus of air conditioner of the embodiment of the present invention, in refrigeration, closes
Close lower wind deflector, only go up air outlet, it is to avoid air-conditioning blow-through human body causes discomfort；When heating, close close wind deflector, under go out
Air port, it is to avoid steam cannot be blown to ground, leads to the not good problem of heating effect.
The above, the only specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, and any
Those familiar with the art the invention discloses technical scope in, change or replacement can be readily occurred in, all should contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be defined by described scope of the claims.