CN205858724U - A kind of novel multi-wing centrifugal fan - Google Patents
A kind of novel multi-wing centrifugal fan Download PDFInfo
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- CN205858724U CN205858724U CN201620076051.7U CN201620076051U CN205858724U CN 205858724 U CN205858724 U CN 205858724U CN 201620076051 U CN201620076051 U CN 201620076051U CN 205858724 U CN205858724 U CN 205858724U
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- fan
- snail tongue
- spiral case
- air
- fan blade
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Abstract
The utility model discloses a kind of novel multi-wing centrifugal fan, including spiral case, snail tongue and some fan blades being fixed in spiral case, the one side of snail tongue is fixed on the medial surface of spiral case air outlet, the another side of snail tongue is concave surface, described concave surface is provided with some wind guide tanks, the both ends of the surface of fan blade are cambered surface, wherein, one cambered surface of fan blade is provided with zigzag structure, another cambered surface of fan blade is provided with bionic, non-smooth structure, and air-flow is discharged from the air outlet of spiral case successively after bionic, non-smooth structure and zigzag structure.This utility model effectively raises air quantity and the blast of blower fan, and significantly reduces fan noise, thus effectively improves the efficiency of blower fan.
Description
Technical field
This utility model relates to a kind of centrifugal blower, is specifically related to a kind of novel multi-wing centrifugal fan.
Background technology
Multi-wing centrifugal fan has that discharge coefficient is big, pressure coefficient is high and the feature such as compact conformation, takes in industrial products
Obtaining and extensively apply, the blower fan overwhelming majority of current lampblack absorber industry all uses multi-wing centrifugal fan, is the most also widely used
In domestic air conditioner.Live closely bound up air-conditioner and the noise of range hood with people and efficiency becomes and receives much attention
Two big performance indications.The main cause that pneumatic noise produces includes: attached an of turbulent flow produced when being airflow passes blade surface
The pressure fluctuation on blade surface that layer causes；Two when being that airflow through snail tongue, and the attached aspect in snail tongue surface develops into certain journey
What degree caused comes off in snail tongue trailing edge eddy generation, causes air flow outlet noise to increase.
The chord length straight blade impeller structures, i.e. vane inlet edge such as the at present many employings of multi-wing centrifugal fan and go out peristoma and impeller
Axis is parallel, and identical along each cross sectional shape of spanwise, size, the pressure coefficient of this linear type impeller is below 0.5, in phase
Pressure under the conditions of Tong uses high rotating speed or big impeller diameter to realize, and increases impeller diameter and receive the limit in space
System, improves rotating speed and increases again noise.Secondly, this vane inlet established angle is identical on all each points in entry impeller edge
, and at this, air velocity is uneven, impeller is caused significantly by the air-flow thus made on vane edge on all each points
Impact, decreases the service life of impeller, and with big noise；And at the air outlet of sheet, due to flow blockage, easy shape
Become eddy current, affect blower fan air-out, make the inefficiency of blower fan, and due to the existence of whirlpool, increase the eddy current crack of blower fan,
Therefore, the chord length straight blade impeller structure such as employing, make the efficiency of impeller be substantially reduced, the efficiency of current range hood all compares
Low, only about about 25%, and range hood and air-conditioner are widely used in daily life, therefore improve work
Seem the most necessary as efficiency.
In order to reduce the noise of blower fan and reduce whirlpool, the shape of snail tongue has been also carried out improving by people.Such as application number
" smoke exhaust ventilator and the snail thereof disclosed in Chinese patent application of 201210210890.X (application publication number is 103512064 A)
Shell, snail tongue ", in this this patent, snail tongue is smooth inner sunken face, and air-flow at snail tongue so can be made more smooth and easy, is conducive to
Reduce noise.But owing to snail tongue surface is plane, there is no special handling, owing to middle flow velocity is big, so middle air flow and two
The air-flow on limit arrives snail tongue simultaneously, causes the superposition of noise.It addition, this snail tongue is simply with in straight snail tonguing interline
Recessed rounding, makes the female parts air-flow of centre reduce, but the whirlpool on both sides still can not eliminate, therefore, and the work of blower fan
The raising of efficiency is not satisfactory.
Utility model content
The purpose of this utility model is the shortcoming overcoming above-mentioned prior art, it is provided that a kind of novel multi-wing centrifugal wind
Machine, the work efficiency of this centrifugal blower is high, noise is little.
For reaching above-mentioned purpose, if novel multi-wing centrifugal fan described in the utility model includes spiral case, snail tongue and solid
Fan blade in spiral case, the one side of snail tongue is fixed on the medial surface of spiral case air outlet, and the another side of snail tongue is
Concave surface, described concave surface is provided with some wind guide tanks, and the both ends of the surface of fan blade are cambered surface, wherein, an arc of fan blade
Face is provided with zigzag structure, and another cambered surface of fan blade is provided with bionic, non-smooth structure, and air-flow is successively through bionical non-
Discharge from the air outlet of spiral case after smooth structure and zigzag structure.
Described snail tongue is connected by screw with the medial surface of spiral case air outlet.
Described concave surface is arc-shaped structure.
Described wind guide tank cross section vertically is the arc-shaped structure of indent；
Described wind guide tank cross section circumferentially is the arc-shaped structure of evagination.
A diameter of 260mm-270mm of described concave surface.
The degree of depth of wind guide tank indent is 3.5mm-4.5mm；
The width of wind guide tank is 25mm-30mm.
In described zigzag structure, the angle between adjacent two teeth is 30 °-50 °；
In described zigzag structure, the height of each tooth is 0.4mm-2mm.
In described bionic, non-smooth structure, the height of each crest is 0.2mm-0.8mm；
In described bionic, non-smooth structure, the spacing between adjacent two troughs is 3mm-7mm.
This utility model has the advantages that
Novel multi-wing centrifugal fan described in the utility model includes spiral case, snail tongue and some blower fans being fixed in spiral case
Blade, the side of described snail tongue is concave surface, makes the length of snail tongue be gradually reduced to centre by two ends, reduce snail tongue two ends air-flows with
The speed difference of middle air flow, makes the air-flow at snail tongue more smooth and easy, thus improves the work efficiency of centrifugal blower, reduces noise；
Concave surface is provided with wind guide tank, reduces the whirlpool during air current flow, improves the work efficiency of centrifugal blower, simultaneously by described
Concave surface and wind guide tank make air-flow there is time difference when arriving snail tongue, reduce the aerodynamic noise in gas flow.Fan blade
Both ends of the surface be cambered surface so that the size of the cross section that fan blade is vertically is different, reduce the deflection of inlet air flow
And impact loss, reduce the friction loss at gas channel leading inlet and the obstruction of Ye Dao import, make import cross stream disconnected simultaneously
Face overdraught velocity gradient is evenly distributed, and make that air velocity adapts to from fan blade top to bottom during turning fast
Speed change, thus reduce the separation loss that leaf road is bent to form, reduce impeller tip exit swirl and Secondary Flow, improve inlet air flow
Dynamic, reduce turbulence noise, improve centrifugal blower efficiency.It addition, blade body cambered surface is provided with zigzag structure, it is possible to
Reduce the eddy current generated due to flow blockage at blade air outlet, the intensity of eddy current can be slackened simultaneously, improve air-flow at Ye Dao
Interior flowing；Another cambered surface of described blade body is provided with bionic, non-smooth structure, it is possible to slacken the reflection of sound wave, reduces
The eddy current that fan blade entrance region is formed, improves the air inlet flowing of air-flow, slackens the air-flow impact to fan blade leading edge, improve
The work efficiency of centrifugal blower, reduces the noise of centrifugal blower.
Accompanying drawing explanation
Fig. 1 is the structural representation of spiral case 2 in this utility model；
Fig. 2 is the installation site figure of snail tongue 1 in this utility model；
Fig. 3 is the structural representation of snail tongue 1 in this utility model；
Fig. 4 is the structural representation of fan blade 5 in this utility model；
Fig. 5 is the partial enlarged drawing of fan blade 5 in this utility model；
Fig. 6 is the location diagram of all fan blades 5 in this utility model.
Wherein, 1 be snail tongue, 2 for spiral case, 3 for concave surface, 4 for wind guide tank, 5 for fan blade, 6 for bionic, non-smooth structure,
7 is zigzag structure.
Detailed description of the invention
Below in conjunction with the accompanying drawings this utility model is described in further detail:
With reference to Fig. 1, novel multi-wing centrifugal fan described in the utility model includes spiral case 2, snail tongue 1 and some is fixed on snail
Fan blade 5 in shell 2, the one side of snail tongue 1 is fixed on the medial surface of spiral case 2 air outlet, and the another side of snail tongue 1 is recessed
Face 3, described concave surface 3 is provided with some wind guide tanks 4, and the both ends of the surface of fan blade 5 are cambered surface, wherein, of fan blade 5
Cambered surface is provided with zigzag structure 7, and another cambered surface of fan blade 5 is provided with bionic, non-smooth structure 6, and air-flow is successively through imitative
Discharge from the air outlet of spiral case 2 after raw non-smooth structure 6 and zigzag structure 7.
It should be noted that described snail tongue 1 is connected by screw with the medial surface of spiral case 2 air outlet, concave surface 3 is circular arc
Shape structure, described wind guide tank 4 arc-shaped structure that cross section is indent vertically；Described wind guide tank 4 cross section circumferentially
Arc-shaped structure for evagination；A diameter of 260mm-270mm of concave surface 3；The degree of depth of wind guide tank 4 indent is 3.5mm-4.5mm；Lead
The width of wind groove 4 is 25mm-30mm, and bionic, non-smooth structure 6 is wavy shaped configuration.
It addition, the angle between adjacent two teeth is 30 °-50 ° in described zigzag structure 7；Each tooth in zigzag structure 7
It is highly 0.4mm-2mm；In bionic, non-smooth structure 6, the height of each crest is 0.2mm-0.8mm；In bionic, non-smooth structure 6
Spacing between adjacent two troughs is 3mm-7mm.
Through experiment, the fan blade 5 in this utility model compared with the fan blade in traditional multi-wing centrifugal fan, energy
The air quantity enough making centrifugal blower improves more than 5%, and blast improves more than 6%, and noise reduces more than 0.5dB, according to centrifugal blower
Power P=Q*B show, the work efficiency of multi-wing centrifugal fan described in the utility model is higher, and wherein, B is the complete of blower fan
Blast, Q is air quantity.It addition, simple in construction of the present utility model, low cost of manufacture, can significantly alleviate the weight of impeller, thus
Improving the work efficiency driving motor of centrifugal blower, the motor that therefore can match lower-wattage just can meet original multiple wing
The demand of centrifugal blower, energy-conserving and environment-protective.
It addition, when the width of wind guide tank 4 is too small, have howling during centrifugal blower work, noise increases, the width of wind guide tank 4
When spending big, the effect of noise reduction and wind-guiding can be reduced.The number of wind guide tank 4 described in this utility model is 4, concave surface 3 straight
Footpath is 260mm-270mm, and the degree of depth of wind guide tank 4 indent is 3.5mm-4.5mm, and the width of wind guide tank 4 is 25mm-30mm.
Snail tongue 1 in this utility model is provided with wind guide tank 4 on the basis of concave surface 3, not only makes middle air flow and two ends gas
Flowing to reach snail tongue 1 has the regular hour poor, and due to the addition of wind guide tank 4, the time difference making air-flow arrival snail tongue 1 is further
Strengthen, reduce the synergistic effect of noise, thus reduce the overall noise of blower fan.When blower fan works, middle air flow speed is more than
Air velocity front and back, middle air flow then can flow to both sides, thus produce whirlpool, and the concave surface 3 in this utility model is provided with
Wind guide tank 4, described wind guide tank 4 can have guide functions to air-flow, reduces the generation of whirlpool in flow process, makes the air-flow in blower fan
Flow more smooth and easy, thus improve the whole work efficiency of blower fan.Through experiment, the snail tongue 1 in this utility model is compared to existing
Snail tongue, this utility model produce noise reduce 1.5dB, the air quantity of centrifugal blower improves 5% relatively simultaneously.
This utility model by snail tongue 1 and fan blade 5 with the use of, it is possible to improve the stream of multi-wing centrifugal fan air-flow
Dynamic, reduce the strength of vortex in leaf road and eddy current quantity so that during airflow passes fan blade 5 surface, on fan blade 5 surface
Pressure fluctuation reduce, be effectively reduced noise 2dB, improve blast simultaneously, thus be effectively improved the efficiency of blower fan.
Claims (5)
1. a novel multi-wing centrifugal fan, it is characterised in that include spiral case (2), snail tongue (1) and some be fixed on spiral case (2)
Interior fan blade (5), the one side of snail tongue (1) is fixed on the medial surface of spiral case (2) air outlet, the opposite side of snail tongue (1)
Face is concave surface (3), and described concave surface (3) is provided with some wind guide tanks (4), and the both ends of the surface of fan blade (5) are cambered surface, wherein,
One cambered surface of fan blade (5) is provided with zigzag structure (7), and another cambered surface of fan blade (5) is provided with bionical non-
Smooth structure (6), air-flow is arranged from the air outlet of spiral case (2) successively after bionic, non-smooth structure (6) and zigzag structure (7)
Go out；
Bionic, non-smooth structure (6) is wavy shaped configuration；
In described bionic, non-smooth structure (6), the height of each crest is 0.2mm-0.8mm；
In described bionic, non-smooth structure (6), the spacing between adjacent two troughs is 3mm-7mm.
Novel multi-wing centrifugal fan the most according to claim 1, it is characterised in that described snail tongue (1) and spiral case (2) air-out
The medial surface of mouth is connected by screw.
Novel multi-wing centrifugal fan the most according to claim 1, it is characterised in that described concave surface (3) is arc-shaped structure.
Novel multi-wing centrifugal fan the most according to claim 3, it is characterised in that described concave surface (3) a diameter of
260mm-270mm。
Novel multi-wing centrifugal fan the most according to claim 1, it is characterised in that
In described zigzag structure (7), the angle between adjacent two teeth is 30 °-50 °；
In described zigzag structure (7), the height of each tooth is 0.4mm-2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620076051.7U CN205858724U (en) | 2016-01-26 | 2016-01-26 | A kind of novel multi-wing centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620076051.7U CN205858724U (en) | 2016-01-26 | 2016-01-26 | A kind of novel multi-wing centrifugal fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205858724U true CN205858724U (en) | 2017-01-04 |
Family
ID=57642029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620076051.7U Expired - Fee Related CN205858724U (en) | 2016-01-26 | 2016-01-26 | A kind of novel multi-wing centrifugal fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205858724U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021114739A1 (en) * | 2019-12-10 | 2021-06-17 | 珠海格力电器股份有限公司 | Novel volute tongue structure, fan volute, and fan |
-
2016
- 2016-01-26 CN CN201620076051.7U patent/CN205858724U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021114739A1 (en) * | 2019-12-10 | 2021-06-17 | 珠海格力电器股份有限公司 | Novel volute tongue structure, fan volute, and fan |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170104 Termination date: 20210126 |