CN207018215U - A kind of low-noise centrifugal fan - Google Patents
A kind of low-noise centrifugal fan Download PDFInfo
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- CN207018215U CN207018215U CN201720602431.4U CN201720602431U CN207018215U CN 207018215 U CN207018215 U CN 207018215U CN 201720602431 U CN201720602431 U CN 201720602431U CN 207018215 U CN207018215 U CN 207018215U
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Abstract
Low-noise centrifugal fan described in the utility model, including be provided with air inlet and snail tongue exhaust passage spiral case and radial device in the centrifugal wind wheel in spiral case, be installed on the centrifugal flow guiding circle of air inlet, be characterized in：The stator that polylith stretches out is had additional on the centrifugal flow guiding circle, and the direction of stator guiding air-flow will approach with the flow direction of primary air inside spiral case.The utility model is during use, both the air draught speed of air inlet can be increased by extra increased stator, improve the air draught ability to air inlet surrounding flow, air-flow can be effectively improved into the flow uniformity in air channel in spiral case by stator again, along with the direction of stator guiding air-flow and the flow direction of primary air inside spiral case approach, so and can reduces the disturbance of air intake air-flow, the impact for reducing air-flow and complete machine is resonated so as to eliminate, effectively lower or abate the noise, improve the usage comfort of consumer.
Description
Technical field
Blower fan field is the utility model is related to, particularly a kind of low-noise centrifugal fan of suitable smoke exhaust ventilator.
Background technology
With the continuous improvement of living standard, modern likes pursuing quiet comfortable healthy living, will to range hood
Ask and also improve constantly.Both wished that the smoking pollution discharge capability of range hood was strong（Smoking ability represents more by force the performance of the product
Better）, wish that range hood noise is low and energy-conserving and environment-protective again.Current big there is also air quantity on the market, the strong range hood of suction,
But the noise of cigarette machine is also relatively bigger than normal, the living standard and quality of people are influenceed, is affected health.This is mainly
Formed because the baffle liner of existing smoke exhaust ventilator centrifugal blower is a simple ring body, but fan delivery demand is big, and rotating speed is high, enters
Wind direction is single, and intake velocity is big, and air-flow relatively evenly can not enter air channel from baffle liner, easily cause air-flow mutually to rush
Hit, so as to cause air-flow and complete machine wall to produce resonance, the similar abnormal sound sailed of generation, increase the pulsation of sound, influence to consume
The comfortableness of person, so must be improved.
The content of the invention
The purpose of this utility model is problem and shortage be present for above-mentioned, there is provided a kind of to be effectively improved the equal of air-flow
Even property, the disturbance of air intake air-flow is reduced, reduce the impact of air-flow and complete machine so as to eliminate resonance, effectively noise-decreasing, and tying
The simple low-noise centrifugal fan of structure.
What the technical solution of the utility model was realized in：
Low-noise centrifugal fan described in the utility model, including it is provided with air inlet and the spiral case and radial direction of snail tongue exhaust passage
The centrifugal wind wheel that is installed in spiral case, the centrifugal flow guiding circle for being installed on air inlet, are characterized in：Increase on the centrifugal flow guiding circle
The stator to stretch out provided with polylith, and the direction of stator guiding air-flow will connect with the flow direction of primary air inside spiral case
Closely.
The scheme that is preferably provided with of above-mentioned stator is the annular gap arrangement along centrifugal flow guiding circle.Centrifugal flow guiding circle is close to cigarette machine
Stator density of setting at suction inlet is greater than the density of setting of other positions.Because the air intake air-flow at cigarette machine suction inlet
Demeanour is big, and flow is greatly, it is necessary to strong water conservancy diversion effect.Other places are to lead relative to the reason for wanting at dilute at suction inlet
Leaf also plays the role of necessarily to hinder air-flow, be not easy it is overstocked, can less as far as possible reduce.
Because snail tongue is that air-flow separates most important place, so further to strengthen its water conservancy diversion effect, above-mentioned centrifugation
Baffle liner need to set a stator near snail tongue exhaust passage.
Optimize air intake fluency to maximize, above-mentioned stator depth of section is more shorter close to height toward centrifugal wind wheel center.
To be slightly larger than close to the gap of the luxuriant heart wind wheel blade of air inlet centrifugal flow guiding circle remote away from air inlet baffle liner apart from leaf
The gap of piece.
The utility model is due to using having additional on centrifugal flow guiding circle the stator and guide stator that polylith stretches out
The direction of air-flow will be with the close structure in flow direction of primary air inside spiral case so that the utility model is in the process used
In, both the air-admitting surface of centrifugal blower can be reduced by extra increased stator, so as to increase the air draught of air inlet speed
Degree, improves the air draught ability to air inlet surrounding flow, can be effectively improved air-flow into air channel in spiral case by stator again
Flow uniformity, along with stator guides the direction of air-flow and the flow direction of primary air inside spiral case to approach, so and can subtracts
The disturbance of few air intake air-flow, reduces the impact of air-flow and complete machine（Reduce impact loss）, so as to eliminate resonance, effectively lower or
Abate the noise, improve the usage comfort of consumer.Efficiently solve existing centrifugal blower air-flow can not relatively evenly from
Baffle liner enter air channel cause noise it is big, using it is uncomfortable the problems such as.The utility model is simple in construction, noise is low, can answer extensively
With that on fume exhaust fan box, can also apply on the type of some new blower fan systems, effect is embodied to eliminate abnormal sound.
The utility model is further described below in conjunction with the accompanying drawings.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation that a centrifugal flow guiding circle is provided with a stator in the utility model.
Fig. 3 is the main structure diagram that the utility model is used on fume exhaust fan box.
Fig. 4 is Fig. 3 side structure schematic view.
Embodiment
As Figure 1-Figure 4, low-noise centrifugal fan described in the utility model, including it is provided with air inlet 11 and snail tongue goes out
The spiral case 1 and radial device in air channel 12 in the centrifugal wind wheel 2 in spiral case 1, be arranged at the centrifugal flow guiding circle 4 of the air inlet 11
（Can abbreviation baffle liner）, two air inlets of above-mentioned spiral case 1 are respectively equipped with centrifugal flow guiding circle.It is described in order to effectively eliminate abnormal sound
The stator 5 that polylith stretches out is had additional on centrifugal flow guiding circle 4, and the stator 5 guides the direction of air-flow will be with the inside of spiral case 1
The flow direction of primary air approaches.So, the utility model when in use, can both be subtracted by these extra increased stators 5
The area of air inlet 11 of small centrifugal blower, so as to increase the air draught speed at air inlet 11, improve to the surrounding flow of air inlet 11
Air draught ability, air-flow can be effectively improved into the flow uniformity in air channel in spiral case 1 by stator 5 again.Along with stator 5
The direction and the flow direction of the inside primary air of spiral case 1 for guiding air-flow approach, so and can reduces the disturbance of air intake air-flow, reduce
The impact of air-flow and complete machine（Reduce impact loss）So as to eliminate resonance, effectively lower or abate the noise, improve consumer's
Usage comfort.The scheme that is preferably provided with of above-mentioned stator 5 is the annular gap arrangement along centrifugal flow guiding circle 4.Due to using
Cheng Zhong, air intake air-flow demeanour of the centrifugal flow guiding circle 4 at cigarette machine suction inlet 3 is big, and flow is big, it is necessary to which strong water conservancy diversion is imitated
Fruit, so stator 5 density of setting of the centrifugal flow guiding circle 4 at cigarette machine suction inlet 3 is greater than the density of setting of other positions.Its
The reason for its position wants at dilute is that stator also plays the role of necessarily to hinder air-flow, be not easy it is overstocked, while water conservancy diversion effect is ensured
It can reduce as far as possible less.Again because snail tongue is that air-flow separates most important place, further to strengthen its water conservancy diversion effect, above-mentioned centrifugation
Baffle liner 4 need to be provided with a stator 5 in the neighbouring position of snail tongue exhaust passage 12.Decision design of the present utility model is：Centrifugal flow guiding circle 4
Three pieces of stators 5 compared with solid matter row are provided with bottom cigarette machine suction inlet 3, centrifugal flow guiding circle 4 is attached in top snail tongue exhaust passage 12
Near position is provided with one piece of stator 5, then is respectively equipped with the stator 5 of one to two piece of diluter arrangement in the both sides position of centrifugal flow guiding circle 4.
And the depth of section of stator 5 on above-mentioned centrifugal flow guiding circle 4 is more toward centrifugal wind wheel center close to shorter, such as the leading stator of height
Make the arcuate structure inwardly bent into stream side.If designing if not so, sustained height is made, when air-flow enters baffle liner
Just it is blocked, is unfavorable for air-flow and smoothly enters baffle liner.Because increasing stator, positive effect is to air inlet
Air-flow drains, and negative role is exactly certain stop minus effect, can reduce intake, therefore to rationally design stator（Also cry and lead
Flowing plate）Shape.Blocking effect is reduced to minimum, optimization air intake fluency is maximized to reach the structure final purpose.To make
It is a little bigger close to air inlet intake, so that the utility model more fully reduces flow loss.Above-mentioned centrifugal wind wheel 2 includes
Some blades 21 between two centrifugal flow guiding circles 4, close to air inlet centrifugal flow guiding circle 4, apart from the gap of blade 21, H1 will
Slightly larger than away from air inlet baffle liner 4 apart from the gap of blade 21 H2.That is close to air inlet baffle liner bottom（It is interior
End）With blade tip distance relatively a little further, to increase intake, and away from air inlet baffle liner bottom（Inner end）With
Blade tip apart from relative proximity a bit, to reduce the leakage that air-flow walks toward outside.Because (the air channel at air inlet, baffle liner
Outside) intake velocity relatively more rapidly;And away from air inlet, the intake velocity at baffle liner (outside air channel) is relative
Slowly a bit, it is therefore desirable to reasonable adjusting once baffle liner bottom arrive vane tip distance, maximize optimize air-inlet condition, and
Prevent gas toward outward leakage.The utility model can be widely used on fume exhaust fan box, can also apply to some new blower fans
On the type of system.The utility model especially adapts to single in air intake direction, and is radial direction air intake, compact-sized, blower fan system
In the case that resistance of uniting is big, effect becomes apparent, little to axial admission structure function.
Although the utility model is to be described with reference to specific embodiments, this description is not meant to the utility model
It is construed as limiting.With reference to description of the present utility model, other changes of the disclosed embodiments, all it is for those skilled in the art
It is anticipated that, this change should belong in appended claims limited range.
Claims (7)
1. a kind of low-noise centrifugal fan, including it is provided with air inlet（11）With snail tongue exhaust passage（12）Spiral case（1）And radially
It is installed on spiral case（1）Interior centrifugal wind wheel（2）, be arranged at the air inlet（11）The centrifugal flow guiding circle at place（4）, its feature exists
In：The centrifugal flow guiding circle（4）On have additional the stator that polylith stretches out（5）, and the stator（5）Guide the direction of air-flow
Will and spiral case（1）The flow direction of the inside primary air approaches.
2. low-noise centrifugal fan according to claim 1, it is characterised in that：Above-mentioned stator（5）Along centrifugal flow guiding circle（4）'s
Arrange annular gap.
3. low-noise centrifugal fan according to claim 2, it is characterised in that：Above-mentioned centrifugal flow guiding circle（4）Inhaled close to cigarette machine
Entrance（3）The stator at place（5）Density of setting is greater than the density of setting of other positions.
4. low-noise centrifugal fan according to claim 1 or claim 2, it is characterised in that：Above-mentioned centrifugal flow guiding circle（4）Go out in snail tongue
Air channel（12）Nearby there is a stator（5）.
5. according to 1 or 2 or 3 low-noise centrifugal fan of claim, it is characterised in that：Above-mentioned centrifugal flow guiding circle（4）It is close
Bottom cigarette machine suction inlet（3）Place is provided with three pieces of stators compared with solid matter row（5）, centrifugal flow guiding circle（4）In top snail tongue exhaust passage
（12）Neighbouring position is provided with one piece of stator（5）, then in centrifugal flow guiding circle（4）Both sides position be respectively equipped with one to two piece of diluter row
The stator of row（5）.
6. low-noise centrifugal fan according to claim 1, it is characterised in that：Above-mentioned stator（5）The more past centrifugation of depth of section
Wind wheel（2）Center is shorter close to height.
7. low-noise centrifugal fan according to claim 1, it is characterised in that：Above-mentioned spiral case（1）Two air inlets difference
Provided with centrifugal flow guiding circle（4）, above-mentioned centrifugal wind wheel（2）Including positioned at two centrifugal flow guiding circles（4）Between some blades（21）, lean on
Nearly air inlet centrifugal flow guiding circle（4）Apart from blade（21）Gap（H1）To be slightly larger than away from air inlet baffle liner（4）Away from
From the gap of blade（H2）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720602431.4U CN207018215U (en) | 2017-05-26 | 2017-05-26 | A kind of low-noise centrifugal fan |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720602431.4U CN207018215U (en) | 2017-05-26 | 2017-05-26 | A kind of low-noise centrifugal fan |
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| Publication Number | Publication Date |
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| CN207018215U true CN207018215U (en) | 2018-02-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720602431.4U Active CN207018215U (en) | 2017-05-26 | 2017-05-26 | A kind of low-noise centrifugal fan |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106968975A (en) * | 2017-05-26 | 2017-07-21 | 广东顺威精密塑料股份有限公司 | A kind of low-noise centrifugal fan |
-
2017
- 2017-05-26 CN CN201720602431.4U patent/CN207018215U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106968975A (en) * | 2017-05-26 | 2017-07-21 | 广东顺威精密塑料股份有限公司 | A kind of low-noise centrifugal fan |
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