CN105570191A - Centrifugal fan and air conditioner - Google Patents
Centrifugal fan and air conditioner Download PDFInfo
- Publication number
- CN105570191A CN105570191A CN201610111871.XA CN201610111871A CN105570191A CN 105570191 A CN105570191 A CN 105570191A CN 201610111871 A CN201610111871 A CN 201610111871A CN 105570191 A CN105570191 A CN 105570191A
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- CN
- China
- Prior art keywords
- guide plate
- blade
- centrifugal blower
- guide
- guide 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a centrifugal fan and an air conditioner, relates to the field of air conditioners, and aims to reduce fluid flow loss and noise of the centrifugal fan. The centrifugal fan comprises a first disc, a second disc and blades arranged between the first disc and the second disc, wherein a flow guide channel is formed between every two adjacent blades; wherein, a flow deflector is arranged in the flow guide channel; the guide vane and the blades have the same shape, and the guide vane and the blades have different sizes. According to the technical scheme, the flow deflector is added into the flow guide channel, so that the channel at the front edge of the original blade is narrowed from wide to narrow, the fluid in the flow guide channel is accelerated, and the kinetic energy of the fluid on the suction surface is effectively increased, so that the aggregation of low-energy fluid is effectively inhibited, the increase of the thickness of the boundary layer is inhibited, the phenomenon of air flow separation at the suction surface of the blade is further reduced, and the purposes of reducing the fluid flow loss and reducing the pneumatic noise of the centrifugal fan are finally achieved.
Description
Technical field
The present invention relates to field of air conditioning, be specifically related to a kind of centrifugal blower and air conditioner.
Background technique
The blade that backward centrifugal blower comprises shroud, hub disk and is located between shroud and hub disk, forms ventilation flue between blade.
Inventor finds, at least following problems is there is: in blower fan real-world operation process in prior art, Airflow obstruction phenomenon is easily there is in ventilation flue inlet, and low energy fluid is easily piled up on the suction surface of blade, blade suction surface is formed larger-size whirlpool, finally make the suction surface place of fluid near blade exit that flow separation phenomenon occurs, thus result in wind wheel and produce larger aerodynamic noise in the running, and then have a strong impact on the working efficiency of blower fan.
Summary of the invention
One of them object of the present invention proposes a kind of centrifugal blower and air conditioner, reduces fluid flow loss and centrifugal fan noise.For achieving the above object, the invention provides following technological scheme:
The invention provides a kind of centrifugal blower, the blade comprising the first dish, the second dish and be arranged between described first dish and the second dish, forms guide channel between two adjacent described blades; Wherein, guide plate is provided with in described guide channel; Described guide plate is leaf identical with described blade, and described guide plate is different with the size of described blade.
In an alternate embodiment of the invention, two described guide plates are provided with in one of them described guide channel; In two described guide plates leading edge and described second disk center's distance less be the first guide plate, another is the second guide plate; Described second guide plate is positioned at the side of described first guide plate suction surface.
In an alternate embodiment of the invention, the trailing edge height of described first guide plate is the 1/2-2/3 of described blade trailing edge height, and the trailing edge height of described second guide plate is the 1/2-2/3 of described first guide plate trailing edge height.
In an alternate embodiment of the invention, the chord length of described first guide plate is the 1/3-1/2 of described blade chord length, and the chord length of described second guide plate is the 1/3-1/2 of described first guide plate chord length.
In an alternate embodiment of the invention, the tail end of described first guide plate and described second guide plate is circumferentially evenly arranged in described guide channel.
In an alternate embodiment of the invention, described guide plate is all furnished with in all described guide channels.
In an alternate embodiment of the invention, described guide plate is furnished with in the described guide channel of part.
In an alternate embodiment of the invention, described centrifugal blower is backward centrifugal blower.
The present invention also provides a kind of air conditioner, comprises the centrifugal blower that the arbitrary technological scheme of the present invention provides.
Based on technique scheme, the embodiment of the present invention at least can produce following technique effect:
Technique scheme, guide plate is added in the interlobate guide channel of centrifugal blower, original blade inlet edge place passage is narrowed from the width, fluid in water conservancy diversion runner is accelerated, the kinetic energy of effective increase suction surface fluid, thus the gathering effectively suppressing low energy fluid, suppress the growth of boundary layer thickness, and then reduce the flow separation phenomenon at blade suction surface place, finally reach the object reducing fluid flow loss and reduce centrifugal blower aerodynamic noise.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
The stereoscopic mechanism schematic diagram of the centrifugal blower that Fig. 1 provides for the embodiment of the present invention one;
Fig. 2 is the plan view of the centrifugal blower removing the first dish in the embodiment of the present invention one;
Fig. 3 is the plan view of the centrifugal blower removing the first dish in the embodiment of the present invention two;
Fig. 4 is the plan view of the centrifugal blower removing the first dish in the embodiment of the present invention three.
Reference character:
1, the first dish; 2, the second dish; 3, blade;
4, guide plate; 5, guide channel; 41, the first guide plate;
42, the second guide plate.
Embodiment
Below in conjunction with the elaboration that Fig. 1 ~ Fig. 4 carries out specifically to technological scheme provided by the invention.
See Fig. 1 and Fig. 2, the embodiment of the present invention one provides a kind of centrifugal blower, is specifically as follows backward centrifugal blower.It comprises the blade 3 that the first dish 1, second coils 2 and is arranged between the first dish 1 and the second dish 2, forms guide channel 5 between two adjacent blades 3; Wherein, be provided with guide plate 4 in guide channel 5, guide plate 4 is for reducing the actual internal area of guide channel 5 to increase the airspeed in guide channel 5.Guide plate 4 is leaf identical with blade 3, and size is different.
In the present embodiment, the first dish 1 is shroud, and the second dish 2 is hub disk.
Technique scheme, guide plate 4 is added in guide channel between the blade 3 of centrifugal blower, original blade 3 leading edge place passage is narrowed from the width, fluid in water conservancy diversion runner is accelerated, the kinetic energy of effective increase suction surface fluid, thus the gathering effectively suppressing low energy fluid, suppress the growth of boundary layer thickness, and then reduce the flow separation phenomenon at blade 3 suction surface place, finally reach the object reducing fluid flow loss and reduce centrifugal blower aerodynamic noise.
Further, at least one guide plate 4 is provided with in guide channel 5.It is such as 1,2 or more.To arrange two guide plates 4 in the present embodiment.Consider from blower fan noise reduction and aspect of performance, the performance arranging the centrifugal blower of 2 guide plates 4 is better than the situation arranging 1 guide plate 4.
Guide channel 5 side is the suction surface of a blade 3 (being called blade m), the pressure side that opposite side () is its adjacent blades 3 (being called blade n) in Fig. 2 counterclockwise, the direction from suction surface to pressure side of indication refers to the pressure side direction from the suction surface of blade m to blade n herein, also can referred to as counterclockwise.When arranging multiple guide plate 4 in a guide channel 5, the size that following manner arranges each guide plate 4 can be installed: according to counterclockwise, the trailing edge height of each guide plate 4 lowers gradually, and the chord length of each guide plate 4 is more and more less.
See Fig. 1, in the present embodiment, in one of them guide channel 5, be provided with two guide plates 4; In these two guide plates 4 leading edge and second coil 2 centre distances less be the first guide plate 41, another is the second guide plate 42.Second guide plate 42 is positioned at the side of the first guide plate 41 suction surface.
See Fig. 2, the leading edge of guide plate 4 refers to that one end of round end of guide plate 4, namely in Fig. 2 guide plate 4 near the one end at centrifugal blower center.In Fig. 2, guide plate 4 is the tail end of guide plate 4 away from the one end at centrifugal blower center.
See Fig. 1, to be provided with two guide plates 4 in a guide channel 5 in the present embodiment, the trailing edge height of the first guide plate 41 in two guide plates 4 is the 1/2-2/3 of blade 3 trailing edge height, and the trailing edge height of the second guide plate 42 in two guide plates 4 is the 1/2-2/3 of the first guide plate 41 trailing edge height; Second guide plate 42 is positioned at the side of the first guide plate 41 suction surface.
Trailing edge height is the perpendicular distance of finger (being such as blade 3, guide plate 4) distance second dish 2 one end distance second dish 2 farthest.For Fig. 1, i.e. the perpendicular distance of A point distance second dish 2 of guide plate 4.
Further, the chord length of the first guide plate 41 in two guide plates 4 is the 1/3-1/2 of blade 3 chord length, and the chord length of the second guide plate 42 in two guide plates 4 is the 1/3-1/2 of the first guide plate 41 chord length; Second guide plate 42 is positioned at the side of the first guide plate 41 suction surface.
See Fig. 2, the tail end (position in Fig. 2 corresponding to B point) of each guide plate 4 (first guide plate 41 and the second guide plate 42) is evenly arranged along the arc section circumference between the tail end of two blades 3 of this guide channel 5 of formation in this guide channel 5.
See Fig. 2, the leaf and blade 3 of guide plate 4 leaf consistent, has good fluid property to use.
The height of guide plate 4 is lower than blade 3 height, and the chord length of guide plate 4 is shorter than blade 3 chord length.Specifically, when having multiple guide plate 4, than during if any two guide plates 4 first guide plate 41, the second guide plate 42, first guide plate 41 is positioned at the side of the suction surface of blade 3, and the second guide plate 42 is positioned at the side of the suction surface of the first guide plate 41: height, the chord length of blade 3, first guide plate 41, second guide plate 42 reduce gradually.
See Fig. 2, in all guide channels 5, be all furnished with guide plate 4.In the present embodiment, to be provided with the first guide plate 41, second guide plate 42 in each guide channel 5.
Introduce a schematic embodiment below.
Shown in composition graphs 1 and Fig. 2, the embodiment of the present invention one provides a kind of centrifugal blower.This centrifugal blower comprises shroud (the first dish 1), hub disk (the second dish 2), blade 3 and guide plate 4.Blade 3 circumference between shroud and hub disk is evenly arranged, guide channel 5 is formed between adjacent two blades 3,2 guide plates 4 are comprised in every guide channel 5, guide plate 4 is circumferentially evenly arranged in guide channel 5, and each blade 3 and guide plate 4 extend from the outward edge of the mediad hub disk of hub disk, guide plate 4 is leaf consistent with blade 3.
The guide plate defined near one of them blade 3 suction surface in every guide channel 5 is the first guide plate, and near its that counterclockwise adjacent blade 3 pressure side is the second guide plate; First guide plate in height reduces gradually to the second guide plate, and the first guide plate 41 trailing edge height is blade 3 height 1/2-2/3, and the second guide plate 42 trailing edge height is 1/2 to 2/3 of the first guide plate 41 trailing edge height.Blade 3 is less than the shroud of guide plate 4 near hub disk central authorities to the distance of hub disk central authorities near the leading edge of hub disk central authorities to the distance of hub disk central authorities, first guide plate 41 is less than the leading edge of the second guide plate 42 near hub disk to the distance of hub disk central authorities near the leading edge of hub disk central authorities to the distance of hub disk central authorities, be convenient to the change of the gas velocity reducing guide channel broad position place, prevent the decay of gas velocity.
The length of the first guide plate 41 is the 1/3-1/2 of blade 3 length, and the length of the second guide plate 42 is the 1/3-1/2 of the first guide plate 41 length.Each guide plate is from the leading edge near hub disk central authorities to guide plate trailing edge, in height increase progressively gradually, the highest near trailing edge position, and leading edge surface is certain arc, meet gaseous fluid characteristic, air turbulence degree in guide channel can be reduced, make air-flow more stable, thus reduce blade 3 suction surface place flow separation phenomenon, finally reduce centrifugal fan noise, improve fan efficiency.
See Fig. 3, the embodiment of the present invention two provides a kind of centrifugal blower, mode of execution and scheme one mode of execution of this programme are basically identical, difference is, nonuniform mutation operator in the circumferential direction of guide plate 4 in the present embodiment in guide channel 5, the suction surface side distribution of centrifugal fan blade 3 is partial to by guide plate 4, or the pressure side side distribution of fan blade 3 is partial to by guide plate 4.No matter guide plate 4 is near suction surface distribution or near pressure side distribution, speed difference between suction surface and pressure side can be reduced, improve blower fan acoustical quality, improve suction surface boundary layer whirlpool break-off, and then avoid the generation of turbulence noise of blower fan, improve the performance of centrifugal blower.
See Fig. 4, the embodiment of the present invention three provides a kind of centrifugal blower, the technological scheme of the present embodiment and the technological scheme of above-described embodiment have following different: be not be provided with guide plate 4 in each guide channel 5 in the present embodiment, that is, be furnished with guide plate 4 in part guide channel 5.Specifically, when ensureing the whole machine balancing of centrifugal blower, guide plate 4 can distribute at interval of the mode of one or more guide channels 5.
Another embodiment of the present invention also provides a kind of air conditioner, comprises the centrifugal blower that the arbitrary technological scheme of the present invention provides.
In describing the invention; it will be appreciated that; term " orientation or the position relationship of the instruction such as " center ", " longitudinal direction ", " transverse direction ", "front", "rear", "left", "right", " vertically ", " level ", " top ", " end ", " interior ", " outward " be based on orientation shown in the drawings or position relationship; be only for ease of describing the present invention and simplified characterization; instead of indicate or infer the device of indication or element must have specific orientation, be specific azimuth configuration and operation, thus can not be interpreted as restriction the present invention being protected to content.
Last it is noted that above embodiment is only in order to illustrate technological scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technological scheme described in foregoing embodiments, or equivalent replacement is carried out to wherein portion of techniques feature, but these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technological scheme.
Claims (9)
1. a centrifugal blower, the blade (3) comprising the first dish (1), the second dish (2) and be arranged between described first dish (1) and the second dish (2), forms guide channel (5) between two adjacent described blades (3); It is characterized in that, in described guide channel (5), be provided with guide plate (4); Described guide plate (4) is leaf identical with described blade (3), and described guide plate (4) is different with the size of described blade (3).
2. centrifugal blower according to claim 1, is characterized in that, is provided with two described guide plates (4) in one of them described guide channel (5); In two described guide plates (4) leading edge and described second coil (2) centre distance less be the first guide plate (41), another is the second guide plate (42); Described second guide plate (42) is positioned at the side of described first guide plate (41) suction surface.
3. centrifugal blower according to claim 2, it is characterized in that, the trailing edge height of described first guide plate (41) is the 1/2-2/3 of described blade (3) trailing edge height, and the trailing edge height of described second guide plate (42) is the 1/2-2/3 of described first guide plate (41) trailing edge height.
4. centrifugal blower according to claim 2, it is characterized in that, the chord length of described first guide plate (41) is the 1/3-1/2 of described blade (3) chord length, and the chord length of described second guide plate (42) is the 1/3-1/2 of described first guide plate (41) chord length.
5., according to the arbitrary described centrifugal blower of claim 2-4, it is characterized in that, the tail end of described first guide plate (41) and described second guide plate (42) is circumferentially evenly arranged in described guide channel (5).
6., according to the arbitrary described centrifugal blower of claim 1-4, it is characterized in that, in all described guide channels (5), be all furnished with described guide plate (4).
7., according to the arbitrary described centrifugal blower of claim 1-4, it is characterized in that, in the described guide channel of part (5), be furnished with described guide plate (4).
8., according to the arbitrary described centrifugal blower of claim 1-4, it is characterized in that, described centrifugal blower is backward centrifugal blower.
9. an air conditioner, is characterized in that, comprises the arbitrary described centrifugal blower of claim 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610111871.XA CN105570191A (en) | 2016-02-29 | 2016-02-29 | Centrifugal fan and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610111871.XA CN105570191A (en) | 2016-02-29 | 2016-02-29 | Centrifugal fan and air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105570191A true CN105570191A (en) | 2016-05-11 |
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ID=55880693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610111871.XA Pending CN105570191A (en) | 2016-02-29 | 2016-02-29 | Centrifugal fan and air conditioner |
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| Country | Link |
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| CN (1) | CN105570191A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108953223A (en) * | 2018-08-16 | 2018-12-07 | 泛仕达机电股份有限公司 | A kind of centrifugal impeller |
| CN108953222A (en) * | 2018-08-16 | 2018-12-07 | 泛仕达机电股份有限公司 | A kind of centrifugal impeller |
| CN110630540A (en) * | 2018-06-21 | 2019-12-31 | 夏普株式会社 | Electric blower and electric dust collector |
| CN111720346A (en) * | 2019-03-22 | 2020-09-29 | 信浓绢糸株式会社 | Air blower |
| CN112343837A (en) * | 2020-12-14 | 2021-02-09 | 湖南联诚轨道装备有限公司 | Axial flow fan with staggered lengths of rotor blades and stationary front guide vanes |
| CN114383802A (en) * | 2021-12-23 | 2022-04-22 | 中国航天空气动力技术研究院 | Pneumatic optimization method for double-arc wind tunnel corner guide vane, guide vane and wind tunnel |
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| CN104653515A (en) * | 2015-02-15 | 2015-05-27 | 浙江理工大学 | Double-suction type centrifugal ventilation fan |
| CN205383109U (en) * | 2016-02-29 | 2016-07-13 | 珠海格力电器股份有限公司 | Centrifugal fan and air conditioner |
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| CN2568855Y (en) * | 2002-07-26 | 2003-08-27 | 江阴市农业药械厂 | Impeller for small high speed centrifugal fan |
| CN2701895Y (en) * | 2003-12-12 | 2005-05-25 | 海尔集团公司 | Fan blade wheel of clothes dryer |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630540A (en) * | 2018-06-21 | 2019-12-31 | 夏普株式会社 | Electric blower and electric dust collector |
| CN110630540B (en) * | 2018-06-21 | 2022-07-05 | 夏普株式会社 | Electric blower and electric dust collector |
| CN108953223A (en) * | 2018-08-16 | 2018-12-07 | 泛仕达机电股份有限公司 | A kind of centrifugal impeller |
| CN108953222A (en) * | 2018-08-16 | 2018-12-07 | 泛仕达机电股份有限公司 | A kind of centrifugal impeller |
| CN111720346A (en) * | 2019-03-22 | 2020-09-29 | 信浓绢糸株式会社 | Air blower |
| CN111720346B (en) * | 2019-03-22 | 2022-06-07 | 信浓绢糸株式会社 | Air blower |
| CN112343837A (en) * | 2020-12-14 | 2021-02-09 | 湖南联诚轨道装备有限公司 | Axial flow fan with staggered lengths of rotor blades and stationary front guide vanes |
| CN114383802A (en) * | 2021-12-23 | 2022-04-22 | 中国航天空气动力技术研究院 | Pneumatic optimization method for double-arc wind tunnel corner guide vane, guide vane and wind tunnel |
| CN114383802B (en) * | 2021-12-23 | 2024-09-17 | 中国航天空气动力技术研究院 | Aerodynamic optimization method for corner guide vane of double arc wind tunnel, guide vane and wind tunnel |
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Application publication date: 20160511 |
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