CN106482195A - Series connection two fans noise reducing type range hood - Google Patents
Series connection two fans noise reducing type range hood Download PDFInfo
- Publication number
- CN106482195A CN106482195A CN201611248312.XA CN201611248312A CN106482195A CN 106482195 A CN106482195 A CN 106482195A CN 201611248312 A CN201611248312 A CN 201611248312A CN 106482195 A CN106482195 A CN 106482195A
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- China
- Prior art keywords
- blower fan
- centrifugal blower
- stage centrifugal
- air inlet
- range hood
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- 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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- 208000011580 syndromic disease Diseases 0.000 claims 1
- 239000000779 smoke Substances 0.000 description 13
- 239000006096 absorbing agent Substances 0.000 description 11
- 239000006233 lamp black Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 4
- 239000003517 fume Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A kind of series connection two fans noise reducing type range hood, first-stage centrifugal blower fan (1) including blower fan case (10) and in blower fan case (10) and two-stage centrifugal blower fan (2), said second centrifugal blower (1) is located at the top of first-stage centrifugal blower fan (1), the air outlet of aforementioned first-stage centrifugal blower fan (1) is connected with the air inlet of two-stage centrifugal blower fan (2) it is characterised in that the air inlet of described first-stage centrifugal blower fan (1) is arranged forward；The air inlet of described two-stage centrifugal blower fan (2) is arranged backwards, and the air inlet of first-stage centrifugal blower fan (1) meets 10 °≤α≤60 ° towards the angle α and the air inlet direction of two-stage centrifugal blower fan (2) between.Compared with prior art, have that windage is little, the low advantage of noise.
Description
Technical field
The present invention relates to a kind of range hood, more particularly, to a kind of range hood having using blower fan suction.
Background technology
The smoke absorption effect of one range hood depends primarily on the flow that it can be discharged under the conditions of use state, stream
Amount is bigger, and smoke absorption effect is also better.Range hood delivery flow in a state of use depends primarily on range hood fan system
The blast of system, blast is bigger, and delivery flow is also bigger.And the blast of range hood fan system is then depending on the electricity of blower fan system
Acc power, power of motor is bigger, and the blast of blower fan system is bigger.In use state, oil smoke needs the lampblack absorber of normal domestic use
By smoke exhaust pipe, check (non-return) valve, discharge flue, oil smoke is discharged, the use of these drag devices is so that oil smoke is in oil smoke outlet
There is certain back pressure in place, the presence of back pressure can largely effect on the delivery flow of lampblack absorber.
The blast of blower fan system has a positive effect to the delivery flow of lampblack absorber, and back pressure rises to the delivery flow of lampblack absorber
Negative influence, both is all objective reality during the use of lampblack absorber, and conflicting, therefore one oil smoke
In use, blower fan system meeting automatic governing is so as to be in the working condition of a relative equilibrium for machine.
Therefore, the blower fan system of current lampblack absorber high-drag pipe network is discharged fume poor, large effect lampblack absorber suitable
Joining property affects the smoke absorption effect under User Status.And current, because a part of lampblack absorber larger in city is in use state,
Oil smoke is except needing the smoke exhaust pipe by itself, check (non-return) valve and discharge flue later in addition it is also necessary to connect firebreak device and public cigarette
Oil smoke could be discharged by road, and for the higher residential building of some floors, common flue is often longer, and common flue
Outlet is arranged on the top of floor, and so for the resident family positioned at lowrise layer, the back pressure of its lampblack absorber will be very big, so
The use of many drag devices, can make lampblack absorber be greatly lowered in the flow using the moment, and smoke absorption effect is deteriorated, noise simultaneously
Larger, if it is desired to improving exhaust effect, current most way is exactly to improve power of motor, increasing exhaust flow, so
Though the result done is often some increases of flow but noise can increase very greatly, attends to one thing and lose sight of another.
The range hood of a lot of centrifugal blowers of connecting, such as Patent No. ZL201310248436.8 is disclosed in prior art
Chinese invention patent application open《A kind of lampblack absorber and its control method》(Authorization Notice No. is CN103363563B).Also may be used
With with reference to CN104949173A, CN105042665A, CN105972663A etc..
Wherein, the blower fan system disclosed in document CN 104949174 A is following arrangement：Including blower hood and collection
Petticoat pipe, is provided with the main blower fan being serially connected and secondary fan in described blower hood, the air outlet of described main blower fan with time
Level blower fan air inlet configured in fluid communication it is characterised in that：More than described main blower fan and secondary fan, the side that is staggered in front and back
Formula vertically be arranged in parallel respectively, and primary and secondary two-stage blower fan all non-overlapping part in vertical projection and floor projection.This design ratio
The blower hood larger compared with being suitable for volume, the wherein connecting tube between the two-stage blower fan of series connection is longer, and flexibility is larger, fluid
Resistance will certainly be larger, and noise also can be very big, meanwhile, vertical direction needs more installing space just permissible.This kind of blower fan
Layout can also have decline space in terms of noise, and meanwhile, existing two centrifugal blowers are highly gone up and can also be dropped in integral installation
Low.
Content of the invention
The technical problem to be solved is to provide a kind of noise lower series connection for the above-mentioned state of the art
Two fans type range hood.
Another technical problem to be solved by this invention is to provide a kind of installation more for the above-mentioned state of the art
The series connection two fans noise reducing type range hood of compact and reasonable
The present invention solves the technical scheme that adopted of above-mentioned technical problem：A kind of series connection two fans noise reducing type fume-exhausting
Machine, the first-stage centrifugal blower fan including blower fan case and in blower fan case and two-stage centrifugal blower fan, said second centrifugal blower
Positioned at the top of first-stage centrifugal blower fan, the air outlet of aforementioned first-stage centrifugal blower fan is connected with the air inlet of two-stage centrifugal blower fan, its
It is characterised by that the air inlet of described first-stage centrifugal blower fan is arranged forward；The air inlet of described two-stage centrifugal blower fan is arranged backwards,
And the angle α 10 °≤α of satisfaction between the air inlet direction of first-stage centrifugal blower fan and the air inlet direction of two-stage centrifugal blower fan≤
60°.
Preferably, described angle α meets 20 °≤α≤40 °.
The bottom of described two-stage centrifugal blower fan is less than the top of first-stage centrifugal blower fan.Whole height reduces, first-stage centrifugal wind
The air inlet of the air outlet of machine and two-stage centrifugal blower fan is closer to advantageously reducing windage, structure arrangement is compacter.
Further, the air outlet of described first-stage centrifugal blower fan is connected by linkage section with the air inlet of two-stage centrifugal blower fan.
The projection in the horizontal plane of the air outlet of described first-stage centrifugal blower fan is existed with the air inlet of described two-stage centrifugal blower fan
Projection on horizontal plane has overlapping region.
Compared with prior art, it is an advantage of the current invention that：Two-stage centrifugal blower fan versus primary centrifugal blower deflection arrangement,
Two grades of air inlets can be made closer to one-level air outlet, the curvature of linkage section diminishes, and air-flow does not turn round in linkage section, can reduce gas
The impact to sencond stage impeller for the stream, reduces noise.
Because two-stage centrifugal blower fan is dorsad arranged, and the air inlet direction of first-stage centrifugal blower fan and two-stage centrifugal blower fan
Air inlet towards between there is an acute angle, air-flow is from the air outlet of first-stage centrifugal blower fan to the air intake of two-stage centrifugal blower fan
Mouth is no longer the turning through 90 degree, thus air current flow is more smoothly, thereby also reduces noise；Meanwhile, first-stage centrifugal wind
Projection in the horizontal plane has overlay region to the projection in the horizontal plane of the air outlet of machine with the air inlet of described two-stage centrifugal blower fan
Domain, further shortens the runner stroke between two-stage centrifugal blower fan, can not only noise abatement further, but also effectively reduce
Blower fan case thickness in the longitudinal direction, makes the miniaturization of tandem type two fans range hood be possibly realized.
Brief description
Fig. 1 is embodiment surface structure schematic diagram.
Fig. 2 is the mplifying structure schematic diagram after removing blower hood and exhaust fume collecting hood in Fig. 1.
Fig. 3 is the structural representation at another visual angle of Fig. 2.
Fig. 4 is the sectional view of the first-stage centrifugal blower fan in embodiment and two-stage centrifugal blower fan.
Fig. 5 is first-stage centrifugal blower fan and two-stage centrifugal blower fan Facad structure sketch in embodiment.
Fig. 6 is the sectional view of first-stage centrifugal blower fan and two-stage centrifugal blower fan in comparative example.
Fig. 7 is first-stage centrifugal blower fan and two-stage centrifugal blower fan Facad structure sketch in comparative example.
Specific embodiment
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
Embodiment, as shown in Figure 1, Figure 2 and Figure 3, the series connection two fans range hood in the present embodiment includes blower fan case
10 and the first-stage centrifugal blower fan 1 in blower fan case 10 and two-stage centrifugal blower fan 2, blower fan case 10 lower end is provided with exhaust fume collecting hood
100, the air intake port of exhaust fume collecting hood 100 is provided with panel 101.
Two-stage centrifugal blower fan 1 is located at top, the air outlet of first-stage centrifugal blower fan 1 and the two-stage centrifugal of first-stage centrifugal blower fan 1
The air inlet of blower fan 2 is connected by linkage section 3, and the air outlet of two-stage centrifugal blower fan 2 is provided with outlet housing 103.
In conjunction with shown in Fig. 4, first-stage centrifugal blower fan 1 is vertically arranged；Two-stage centrifugal blower fan 2 in the vertical direction deflects angle
α, α meet 10 °≤α≤60 ° it is preferable that the bottom of α 20 °≤α≤40 of satisfaction and, two-stage centrifugal blower fan 2 is deflected outward by, and
And, the bottom of two-stage centrifugal blower fan 2 is less than the top of first-stage centrifugal blower fan 1.
The air inlet of the projection in the horizontal plane of the air outlet of first-stage centrifugal blower fan 1 and two-stage centrifugal blower fan 2 is in horizontal plane
On projection have overlapping region, it is shorter that linkage section 3 can do.Reduce stop in linkage section 3 for the air-flow, reduce windage and make an uproar
Sound.
Comparative example, as shown in Figure 6 and Figure 7, first-stage centrifugal blower fan 1 He in the series connection two fans range hood in the present embodiment
Two-stage centrifugal blower fan about 2, the mode that is staggered in front and back vertically be arranged in parallel, the air outlet of first-stage centrifugal blower fan 1 and two-stage centrifugal wind
The air inlet of machine 2 is connected by swan-neck 3a, and, the air outlet of the air outlet of first-stage centrifugal blower fan 1 and two-stage centrifugal blower fan 2
It is on the same side.
Embodiment and comparative example test data such as following table
In upper table, flow is to record on the air force tester of laboratory standard, and rotating speed is impeller under this flow
Velocity of rotation, rotating speed is to be recorded with tachometer, and noise is to hang up blower fan system to be surveyed using sound meter in diverse location
Amount.
As seen from the above table, the rotating speed of blower fan system reduces 78rpm, and flow increases 0.77m3/min, and noise is in different positions
Put reduction 1.7dB and 2.4dB respectively.
The analysis of causes, specific as follows：
First, comparative example is first-stage centrifugal blower fan and two-stage centrifugal blower fan is vertical laid parallel, the one of embodiment design
Big feature is that first-stage centrifugal blower fan and two-stage centrifugal blower fan are tilted assembled arrangement, and such putting can make two grades of air inlets more lean on
Nearly one-level air outlet, the curvature of linkage section diminishes, and air-flow does not turn round in linkage section, can reduce air-flow and sencond stage impeller is rushed
Hit, reduce noise.
Second, air outlet side-looking direction streamline the leading back into two grades through linkage section of comparative example first-stage centrifugal blower fan
Centrifugal blower rear upper part air-flow is larger with respect to exit flow direction deflection angle, so will result in air-flow in discharge process
Curvature is larger, and lower part airflow easily clashes into impeller bottom, easily causes shock loss and the disorder of air-flow；Two-stage in embodiment
There is angle α, after primary air stream enters two grades, air-flow oblique cutting is discharged to after impeller, air-flow, in running, turns between blower fan
Curved less, path is more straight, therefore resistance is less, and air current flow is smooth, and noise reduces.
Claims (5)
1. a kind of series connection two fans noise reducing type range hood, the one-level including blower fan case (10) and in blower fan case (10)
Centrifugal blower (1) and two-stage centrifugal blower fan (2), said second centrifugal blower (1) is located at the top of first-stage centrifugal blower fan (1), front
The air outlet stating first-stage centrifugal blower fan (1) connect with the air inlet of two-stage centrifugal blower fan (2) it is characterised in that described one-level from
The air inlet of heart-wind syndrome machine (1) is arranged forward；The air inlet of described two-stage centrifugal blower fan (2) is arranged backwards, and first-stage centrifugal wind
The air inlet of machine (1) meets 10 °≤α≤60 ° towards the angle α and the air inlet direction of two-stage centrifugal blower fan (2) between.
2. series connection two fans noise reducing type range hood according to claim 1 is it is characterised in that described angle α meets 20 °
≤α≤40°.
3. series connection two fans noise reducing type range hood according to claim 1 is it is characterised in that described two-stage centrifugal blower fan
(2) bottom lowest part is less than the top of first-stage centrifugal blower fan (1).
4. series connection two fans noise reducing type range hood according to claim 1 is it is characterised in that described first-stage centrifugal blower fan
(1) air outlet is connected by linkage section (3) with the air inlet of two-stage centrifugal blower fan (2).
5. according to arbitrary described series connection two fans noise reducing type range hood in Claims 1-4 it is characterised in that described one-level
The air inlet of the projection in the horizontal plane of the air outlet of centrifugal blower (1) and described two-stage centrifugal blower fan (2) is in the horizontal plane
Projection has overlapping region.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611248312.XA CN106482195A (en) | 2016-12-29 | 2016-12-29 | Series connection two fans noise reducing type range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611248312.XA CN106482195A (en) | 2016-12-29 | 2016-12-29 | Series connection two fans noise reducing type range hood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106482195A true CN106482195A (en) | 2017-03-08 |
Family
ID=58285157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611248312.XA Pending CN106482195A (en) | 2016-12-29 | 2016-12-29 | Series connection two fans noise reducing type range hood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106482195A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109990350A (en) * | 2017-12-30 | 2019-07-09 | 宁波方太厨具有限公司 | A kind of double stage tandem denoising structure and its range hood |
| CN110186087A (en) * | 2019-05-19 | 2019-08-30 | 宁波方太厨具有限公司 | A kind of series connection two fans type range hood and its flow control methods |
| CN111089068A (en) * | 2018-10-24 | 2020-05-01 | 宁波方太厨具有限公司 | Series double-fan type range hood |
| CN113154368A (en) * | 2021-06-04 | 2021-07-23 | 西安热工研究院有限公司 | Pulverized coal boiler fan arrangement system for reducing noises of air feeder and primary fan |
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|---|---|---|---|---|
| EP0940632A1 (en) * | 1998-03-05 | 1999-09-08 | BSH Bosch und Siemens Hausgeräte GmbH | Extractor hood |
| CN103321929A (en) * | 2013-06-15 | 2013-09-25 | 吴钰 | Relay flow fan and extractor hood with same |
| CN103732924A (en) * | 2011-06-24 | 2014-04-16 | 瓦特燃料电池公司 | Centrifugal blower system and fuel cell incorporating same |
| CN203785039U (en) * | 2014-03-27 | 2014-08-20 | 宁波方太厨具有限公司 | Range hood with lengthened outer fan cover |
| CN104949175A (en) * | 2014-03-27 | 2015-09-30 | 宁波方太厨具有限公司 | Tandem double-fan structure for extractor hood |
| CN105546613A (en) * | 2016-02-25 | 2016-05-04 | 宁波方太厨具有限公司 | Shunting device for extractor hood and cascaded fans applying shunting device |
| CN205807567U (en) * | 2016-06-27 | 2016-12-14 | 中山市和美电器燃具有限公司 | A supercharging structure of a range hood |
| CN206330192U (en) * | 2016-12-29 | 2017-07-14 | 宁波方太厨具有限公司 | Series connection two fans noise reducing type range hood |
-
2016
- 2016-12-29 CN CN201611248312.XA patent/CN106482195A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0940632A1 (en) * | 1998-03-05 | 1999-09-08 | BSH Bosch und Siemens Hausgeräte GmbH | Extractor hood |
| CN103732924A (en) * | 2011-06-24 | 2014-04-16 | 瓦特燃料电池公司 | Centrifugal blower system and fuel cell incorporating same |
| CN103321929A (en) * | 2013-06-15 | 2013-09-25 | 吴钰 | Relay flow fan and extractor hood with same |
| CN203785039U (en) * | 2014-03-27 | 2014-08-20 | 宁波方太厨具有限公司 | Range hood with lengthened outer fan cover |
| CN104949175A (en) * | 2014-03-27 | 2015-09-30 | 宁波方太厨具有限公司 | Tandem double-fan structure for extractor hood |
| CN105546613A (en) * | 2016-02-25 | 2016-05-04 | 宁波方太厨具有限公司 | Shunting device for extractor hood and cascaded fans applying shunting device |
| CN205807567U (en) * | 2016-06-27 | 2016-12-14 | 中山市和美电器燃具有限公司 | A supercharging structure of a range hood |
| CN206330192U (en) * | 2016-12-29 | 2017-07-14 | 宁波方太厨具有限公司 | Series connection two fans noise reducing type range hood |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109990350A (en) * | 2017-12-30 | 2019-07-09 | 宁波方太厨具有限公司 | A kind of double stage tandem denoising structure and its range hood |
| CN109990350B (en) * | 2017-12-30 | 2023-11-21 | 宁波方太厨具有限公司 | Double-stage series noise reduction structure and range hood thereof |
| CN111089068A (en) * | 2018-10-24 | 2020-05-01 | 宁波方太厨具有限公司 | Series double-fan type range hood |
| CN111089068B (en) * | 2018-10-24 | 2021-05-18 | 宁波方太厨具有限公司 | Series double-fan type range hood |
| CN110186087A (en) * | 2019-05-19 | 2019-08-30 | 宁波方太厨具有限公司 | A kind of series connection two fans type range hood and its flow control methods |
| CN113154368A (en) * | 2021-06-04 | 2021-07-23 | 西安热工研究院有限公司 | Pulverized coal boiler fan arrangement system for reducing noises of air feeder and primary fan |
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Application publication date: 20170308 |
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