CN106438466A - Centrifugal fan and air-conditioner indoor unit - Google Patents

Centrifugal fan and air-conditioner indoor unit Download PDF

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Publication number
CN106438466A
CN106438466A CN201610956118.0A CN201610956118A CN106438466A CN 106438466 A CN106438466 A CN 106438466A CN 201610956118 A CN201610956118 A CN 201610956118A CN 106438466 A CN106438466 A CN 106438466A
Authority
CN
China
Prior art keywords
blade
centrifugal blower
air
impeller
air channel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610956118.0A
Other languages
Chinese (zh)
Inventor
孙祥
孟庆刚
赵希枫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hisense Shandong Air Conditioning Co Ltd
Original Assignee
Hisense Shandong Air Conditioning Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hisense Shandong Air Conditioning Co Ltd filed Critical Hisense Shandong Air Conditioning Co Ltd
Priority to CN201610956118.0A priority Critical patent/CN106438466A/en
Publication of CN106438466A publication Critical patent/CN106438466A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/26Rotors specially for elastic fluids
    • F04D29/28Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/26Rotors specially for elastic fluids
    • F04D29/28Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/30Vanes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007Indoor units, e.g. fan coil units
    • F24F1/0018Indoor units, e.g. fan coil units characterised by fans
    • F24F1/0022Centrifugal or radial fans

Abstract

The invention discloses a centrifugal fan and an air-conditioner indoor unit and relates to the technical field of the air conditioner. The centrifugal fan and the air-conditioner indoor unit are invented for solving the problems of full pressure and lower efficiency of the centrifugal fan in the prior art. The centrifugal fan provided by the invention comprises an impeller, wherein the impeller comprises a hub and a blade set arranged on one side of the hub; the hub is connected with a motor; the blade set comprises a plurality of first blades arrayed along the edge of the hub; at least one second blade is arranged between two adjacent first blades; the length of the second blades along the radial direction of the impeller is less than the length of the first blades. The centrifugal fan provided by the invention is used for increasing the air pressure and exhausting air.

Description

A kind of centrifugal blower and indoor apparatus of air conditioner
Technical field
The present invention relates to air-conditioning technical field, more particularly, to a kind of centrifugal blower and indoor apparatus of air conditioner.
Background technology
At present, the application of centrifugal blower is very universal, and most commercial production and daily life all be can't do without being centrifuged wind The figure of machine.
Impeller is the vitals of centrifugal blower, because the air-flow in centrifugal blower flows for diffusion, in impeller passage Easily produce air-flow to separate, particularly near the suction side of blade afterbody, segregation phenomenon is serious, and blade suction side can form mental retardation The wake zone of fluid accumulation, forms Jet wake structure, and the vortex of wake zone makes runner valid circulation area reduce, thus from Heart blower press and less efficient.
Content of the invention
Embodiments of the invention provide a kind of centrifugal blower and indoor apparatus of air conditioner, it is possible to resolve in prior art, centrifugal blower is complete Pressure and less efficient problem.
For reaching above-mentioned purpose, embodiments of the invention adopt the following technical scheme that:
A kind of centrifugal blower, including impeller, described impeller includes wheel hub and the blade group being arranged at wheel hub side, described Wheel hub is connected with motor, described blade group include multiple along Hub side along arrangement the first blades, two neighboring first blade it Between be equipped with least one second blade, along described impeller described second blade of radial direction length be less than the first blade length Degree.
The embodiment of the invention also discloses a kind of indoor apparatus of air conditioner, including housing, in described housing, it is provided with air channel, described shell Air inlet and air outlet are offered on body, described air inlet is all connected with described air channel with described air outlet, pacify in described air channel Equipped with above-mentioned centrifugal blower.
Centrifugal blower provided in an embodiment of the present invention and indoor apparatus of air conditioner, with respect to prior art, at adjacent two Be provided with least one second blade between one blade, the second blade can by the fluid partitioning of the first blade suction surface near exit, And the wake zone at impeller outlet is smashed, diminishes, improve the pressure of impeller outer edge air-flow, reduce air-flow in impeller passage In wind loss, thus improve centrifugal blower total head and efficiency.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only this Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, acceptable Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is one of structural representation of centrifugal blower in the embodiment of the present invention;
Fig. 2 is two of the structural representation of centrifugal blower in the embodiment of the present invention;
Fig. 3 is three of the structural representation of centrifugal blower in the embodiment of the present invention;
Fig. 4 is four of the structural representation of centrifugal blower in the embodiment of the present invention;
Fig. 5 is to install one of structural representation of centrifugal blower in indoor apparatus of air conditioner in the embodiment of the present invention;
Fig. 6 is the structure decomposition figure installing centrifugal blower in indoor apparatus of air conditioner in the embodiment of the present invention;
Fig. 7 is the two of the structural representation installing centrifugal blower in indoor apparatus of air conditioner in the embodiment of the present invention;
Fig. 8 is the P portion enlarged drawing of Fig. 7.
Specific embodiment
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 Effect.
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.

Claims (15)

1. a kind of centrifugal blower, including impeller, described impeller includes wheel hub and the blade group being arranged at wheel hub side, described wheel Hub is connected with motor it is characterised in that described blade group includes multiple the first blades along Hub side along arrangement, and two neighboring the It is equipped with least one second blade, the length along described second blade of radial direction of described impeller is less than the first leaf between one blade The length of piece.
2. centrifugal blower according to claim 1 is it is characterised in that the shape of described first blade and described second blade Identical, the volume of described first blade is V1, the volume of the second blade is V2, and V2Span be V1/ 3~2V1/3.
3. it is characterised in that the external diameter of described impeller is D, the internal diameter of impeller is d to centrifugal blower according to claim 1, The span of d/D is 0.4~0.6.
4. the centrifugal blower according to any one of claims 1 to 3 is it is characterised in that the outlet of described first blade is pacified The exit installation angle B of dress angle A and described second blade is equal, and the span of the exit installation angle A of described first blade is 20 ° ~50 °.
5. centrifugal blower according to claim 4 is it is characterised in that the exit installation angle A of described first blade is 30 °.
6. centrifugal blower according to claim 1 is it is characterised in that two neighboring first interlobate second blade is Multiple and quantity is equal, multiple described second spacing with blades and being uniformly arranged between two neighboring described first blade.
7. centrifugal blower according to claim 1 is it is characterised in that the quantity phase of described first blade and the second blade Quantitative range in, described first blade is 9~15.
8. centrifugal blower according to claim 7 is it is characterised in that the quantity of described first blade is 11.
9. centrifugal blower according to claim 1 it is characterised in that described first blade away from described centrifugal blower axle Heart one end is the outer end of the first blade, and the outer end of the described first blade corner near described centrifugal blower inlet side is formed with Chamfering.
10. a kind of indoor apparatus of air conditioner, including housing, is provided with air channel in described housing, described housing offers air inlet and goes out Air port, described air inlet and described air outlet are all connected with described air channel it is characterised in that being provided with above-mentioned power in described air channel Profit requires the centrifugal blower any one of 1~9.
11. indoor apparatus of air conditioner according to claim 10 are it is characterised in that described centrifugal blower is fixed on described housing On, described air inlet is relative with the inlet side of described centrifugal blower, and described air outlet is arranged at the radial direction of described centrifugal blower, institute State the air channel part relative with described centrifugal blower side to gradually taper up along the air intake direction of described centrifugal blower.
12. indoor apparatus of air conditioner according to claim 11 it is characterised in that described centrifugal blower impeller near described from Heart-wind syndrome machine inlet side one end with diameter greater than described impeller away from described centrifugal blower inlet side one end diameter.
13. indoor apparatus of air conditioner according to claim 12 are it is characterised in that described centrifugal blower is installed on described housing The first side wall, the back shroud of impeller of described centrifugal blower is relative with described the first side wall, described air channel and described the first side wall phase Connect, the angle between described air channel and described the first side wall is α, described first blade is away from the one of the axle center of described centrifugal blower Hold the outer end for the first blade, the angle between the outer end wall of described first blade and the back shroud of impeller of described centrifugal blower For β, and β=α.
14. indoor apparatus of air conditioner according to claim 13 are it is characterised in that between described air channel and described the first side wall Angle α is 90 °~110 °.
15. indoor apparatus of air conditioner according to claim 14 are it is characterised in that between described air channel and described the first side wall Angle α is 100 °.
CN201610956118.0A 2016-11-03 2016-11-03 Centrifugal fan and air-conditioner indoor unit Pending CN106438466A (en)

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
CN107036175A (en) * 2017-06-13 2017-08-11 广州海科电子科技有限公司 Air channel shell and clarifier
CN110177951A (en) * 2017-03-29 2019-08-27 三菱重工发动机和增压器株式会社 Impeller and centrifugal compressor
CN112934490A (en) * 2021-04-23 2021-06-11 德海谛汽车技术(苏州)有限公司 Centrifugal separator disc and centrifugal separator thereof

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Publication number Priority date Publication date Assignee Title
CN110177951A (en) * 2017-03-29 2019-08-27 三菱重工发动机和增压器株式会社 Impeller and centrifugal compressor
CN110177951B (en) * 2017-03-29 2021-02-19 三菱重工发动机和增压器株式会社 Impeller and centrifugal compressor
CN107036175A (en) * 2017-06-13 2017-08-11 广州海科电子科技有限公司 Air channel shell and clarifier
CN112934490A (en) * 2021-04-23 2021-06-11 德海谛汽车技术(苏州)有限公司 Centrifugal separator disc and centrifugal separator thereof

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Address after: 266100 Zhuzhou Road, Laoshan District, Qingdao, Shandong Province, No. 151

Applicant after: Hisense (Shandong) Air-conditioning Co., Ltd.

Address before: 266736 Hisense Road 1, South Village Town, Pingdu City, Qingdao, Shandong

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Application publication date: 20170222