CN105485743B - A kind of range hood with noise reducing mechanism - Google Patents
A kind of range hood with noise reducing mechanism Download PDFInfo
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- CN105485743B CN105485743B CN201610031338.2A CN201610031338A CN105485743B CN 105485743 B CN105485743 B CN 105485743B CN 201610031338 A CN201610031338 A CN 201610031338A CN 105485743 B CN105485743 B CN 105485743B
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- China
- Prior art keywords
- convex tendon
- range hood
- sudden expansion
- reducing mechanism
- noise reducing
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Classifications
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- 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
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- 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
The invention discloses a kind of range hood with noise reducing mechanism, provided with local sudden expansion in the fluid passage inside the range hood, it is characterised in that：The vortex generator for being used for producing additional whirlpool boundary layer is provided with the direction of flow of the local sudden expansion.Compared with prior art, the advantage of the invention is that：The range hood in the direction of flow of the local sudden expansion of fluid passage by setting after vortex generator, the whirlpool of separation can be produced, on the one hand it can slow down because fluid velocity declines suddenly caused by sudden expansion, on the other hand the whirlpool separated is used to blend boundary layer, so that nearby fluid micellar obtains bigger spinning momentum in boundary layer, the volute of separation is into can reduce influence of the sudden expansion for fluid passage behind additional whirlpool boundary layer, negative pressure and the loss of corner are reduced, so as to reduce form drag and noise.
Description
Technical field
The present invention relates to a kind of range hood, more particularly, to a kind of range hood with noise reducing mechanism.
Background technology
At present, there is the region of several fluid cross-section sudden enlargements in the fluid passage that range hood inner air flows through i.e.
Local sudden expansion, these local sudden expansions are predominantly located at three below region：1st, exhaust fume collecting hood and blower fan connector, 2, current collector and impeller
Between the circle of front end, between 3, volute outlet and outlet housing.Air velocity scope in range hood internal fluid channels probably exists
Between 5-30m/s, it was found from hydromechanical principle, the linear loss that short pipeline is compared in the loss that general part sudden expansion is produced is big
It is many, especially speed is higher, and loss difference is more obvious, and the loss that local sudden expansion is produced is main energy in process fluid flow
Amount loss source, local sudden expansion can produce larger resistance, simultaneous boundary layer separation, the increase of noise.Therefore, in order to
Effectively reduce the noise of range hood and reduce local losses, need to change the structure in fluid passage at local sudden expansion
Enter.
The content of the invention
The technical problems to be solved by the invention are can be used for blending office there is provided one kind for above-mentioned state of the art
The range hood with noise reducing mechanism in the boundary layer of portion's sudden expansion.
The present invention solve the technical scheme that is used of above-mentioned technical problem for：This has the range hood of noise reducing mechanism,
Provided with local sudden expansion in fluid passage inside the range hood, it is characterised in that：Described noise reducing mechanism is is arranged on
State in the direction of flow of local sudden expansion and be used for producing the vortex generator in additional whirlpool boundary layer.
Described vortex generator can have various structures, it is preferable that described vortex generator is local prominent to be arranged on
The convex tendon expanded on the passage component to flow end.The front end that end is fluid cross-section sudden enlargement, through-flow portion are flowed in local sudden expansion
Part is the part that air-flow flows through, such as the part such as exhaust fume collecting hood, current collector, snail tongue.
As a kind of preferred scheme, described vortex generator be the top of the exhaust fume collecting hood medial surface located at range hood simultaneously
Close to the first convex tendon of exhaust fume collecting hood inner side edge, length direction of first convex tendon along the inner side edge is arranged in order, and the
Length direction of the length direction of one convex tendon perpendicular to the inner side edge.So, vortex generator is sent out in the simple vortex of line style
Raw device, structure is very simple, is particularly suitable for the local sudden expansion region of exhaust fume collecting hood and blower fan connector.
Preferably, bar shaped installing plate is fixed with the top of the exhaust fume collecting hood medial surface and close inner side edge, first is convex
Muscle is taken shape on the bar shaped installing plate, and the height h1 of the first convex tendon and thickness t of bar shaped installing plate value relation is t
≤ h1≤5t, the width w1 of first convex tendon and the thickness t of the bar shaped installing plate value relation are 1.5t≤w1≤4t.
It is used as the preferred of such scheme, the height h1 of first convex tendon and the thickness t of the bar shaped installing plate value
Relation is t≤h1 ＜ 3t, and consistent before and after the height of the first convex tendon.
It is used as the further preferred of such scheme, the height h1 of first convex tendon and the bar shaped installing plate thickness t
Value relation be 3t≤h1≤5t, and the height of the first convex tendon gradually rises from front to back.So, the first convex tendon is using preceding low
High arrangement afterwards, it is possible to reduce leading portion resistance increases the generation effect in rear end whirlpool simultaneously.
As another preferred scheme, current collector, described vortex are provided with the front side of the wheel nose circle of range hood
Generator is the second convex tendon being spaced apart along the internal perisporium of current collector.
Further preferably, the second described convex tendon is triangular in shape, and the height h2 of second convex tendon is 3mm≤h2≤10mm,
The close angular range to flow the base angle A at end of second convex tendon is 0 ° of ＜ A≤20 °, and the second convex tendon drift angle B angular range is
110 ° of B ＜, also, second convex tendon is away from flowing the base angle C at end adjacent to the edge of the current collector.So, vortex generator
In the triangle vortex generator of similar shark fins, it is particularly suitable for the local sudden expansion region between current collector and wheel nose circle.
Further preferably, the width w2 of second convex tendon is 1mm≤w2≤10mm.
Further preferably, the width w2 of second convex tendon gradually increases from top to bottom.
As another preferred scheme, described vortex generator is towards outlet housing located at cooking-fume exhauster blower snail tongue
The 3rd convex tendon on side.
Further preferably, adjacent 3rd convex tendon of each two in the 3rd convex tendon is in the stream of the fluid in fluid passage
The splayed configuration structure that dynamic direction is opened.So, vortex generator is constituted by vortex generator is expanded, and is particularly suitable for application spiral case
Local sudden expansion region between outlet housing.
In order to improve the ability that vortex is produced, the angle C between two the 3rd convex tendons for mutually opening in splayed configuration
Scope be 0 ° of ＜ C≤45 °
Compared with prior art, the advantage of the invention is that：The range hood passes through the local sudden expansion in fluid passage
Set in direction of flow after vortex generator, the whirlpool of separation can be produced, on the one hand can be slowed down due to fluid caused by sudden expansion
Speed declines suddenly, and the whirlpool on the other hand separated is used to blend boundary layer so that nearby fluid micellar is obtained more in boundary layer
Big spinning momentum, the volute of separation is into that can reduce influence of the sudden expansion for fluid passage behind additional whirlpool boundary layer, and reduction is turned
The negative pressure of crook and loss, so as to reduce form drag and noise.
Brief description of the drawings
Fig. 1 is the fluid schematic in the local sudden expansion region of fluid passage in the prior art；
Fig. 2 is the fluid schematic in the local sudden expansion region of the fluid passage of the present invention；
Fig. 3 is the structural representation of the embodiment of the present invention one；
Fig. 4 is the enlarged diagram of part A in Fig. 3；
Fig. 5 is the structural representation of the first convex tendon of the embodiment of the present invention one；
Fig. 6 is the structural representation of the embodiment of the present invention two；
Fig. 7 is the enlarged diagram of part B in Fig. 6；
Fig. 8 is the mounting structure schematic diagram of the second convex tendon of the embodiment of the present invention two；
Fig. 9 is the top view of the second convex tendon of the embodiment of the present invention；
Figure 10 is the structural representation of the embodiment of the present invention three；
Figure 11 is the structural representation of snail tongue in Figure 10；
Figure 12 is the structural representation of the 3rd convex tendon of the embodiment of the present invention three.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing embodiment.
Provided with local sudden expansion in fluid passage inside the range hood of the present invention, local sudden expansion is fluid cross-section is dashed forward
The region so expanded, these local sudden expansions are primarily present following three region：A, exhaust fume collecting hood 1 and the connector of blower fan 2, b, current collector
Between 4 and the front end of impeller 3 circle, between c, volute outlet and outlet housing 6.Local sudden expansion can produce larger resistance, while adjoint
Boundary layer separation, the increase of noise.
The vortex generator of the present invention constitutes noise reducing mechanism, and its operation principle is as follows：
As depicted in figs. 1 and 2, the direction of horizontal arrow is in local sudden expansion in the direction of flow of local sudden expansion, Fig. 2
Direction of flow is provided with small-sized vortex generator, and the vortex generator is to be arranged on local sudden expansion to flow the passage component 8 at end
On convex tendon 7, the effect of increase convex tendon 7 is the whirlpool for producing small separation in advance, forms vortex generator, is on the one hand slowed down due to prominent
Speed declines suddenly caused by expanding, and the whirlpool on the other hand separated is used to blend boundary layer so that nearby fluid is micro- in boundary layer
Group obtains bigger spinning momentum, forms additional whirlpool boundary layer, and whirlpool slightly keeps original track towards follow-up due to the effect of inertia
Continuous rotary motion so that boundary layer originally can continue one end, the unnecessary border after reduction sudden expansion under the left and right in whirlpool
Layer separation, reduces influence of the sudden expansion for fluid passage, reduces negative pressure and the loss of corner.So as to reduce form drag with making an uproar
Sound.
Embodiment one：
As shown in Figures 3 to 5, the vortex generator in the present embodiment is the medial surface of exhaust fume collecting hood 1 located at range hood
Top and the first convex tendon 71 of close exhaust fume collecting hood inner side edge, the length direction of the first convex tendon 71 along the inner side edge are arranged successively
Row, and the first convex tendon 71 length direction perpendicular to inner side edge length direction.I.e. the snail generator is in the simple vortex of line style
Generator, structure is very simple, is particularly suitable for the local sudden expansion region of exhaust fume collecting hood 1 and the connector of blower fan 2.
In the present embodiment, bar shaped installing plate 11, bar shaped are fixed with the top of exhaust fume collecting hood medial surface and at inner side edge
Installing plate is using sheet metal component and installed in the inner side edge of the front side of exhaust fume collecting hood 1, and the first convex tendon 71 is taken shape on the bar shaped installing plate 11,
And first the thickness t value relation of height h1 and bar shaped installing plate 11 of convex tendon 71 be t≤h1≤5t, the width of the first convex tendon 71
The value relation for spending the w1 and thickness t of bar shaped installing plate 11 is 1.5t≤w1≤4t.In addition, as t≤h1 ＜ 3t, the first convex tendon
It is consistent before and after 71 height；As 3t≤h1≤5t, the height of the first convex tendon 71 gradually rises from front to back.
Embodiment two：
As shown in Figures 6 to 9, the front side enclosed in the front end of impeller 3 of range hood is provided with current collector 4, the present embodiment
Vortex generator is the second convex tendon 72 being spaced apart along the internal perisporium of current collector 4.Second convex tendon 72 is triangular in shape, and second
The height h2 of convex tendon 72 is 3mm≤h2≤10mm, and the width w2 of the second convex tendon 72 is 1mm≤w2≤10mm, also, the second convex tendon
72 width w2 can be designed to gradually increase from top to bottom.The length L of second convex tendon 72 depends primarily on following structural member,
I.e. in the present embodiment, depending on the size of current collector 4.
The close angular range to flow the base angle A at end of second convex tendon 72 is 0 ° of ＜ A≤20 °, second convex tendon 72 drift angle B's
Angular range is 110 ° of B ＜, and second convex tendon 72 is away from flowing the base angle C at end adjacent to the edge of current collector 4.The vortex generator
In the triangle vortex generator of similar shark fins, it is particularly suitable for the local sudden expansion area between current collector 4 and the front end of impeller 3 circle
Domain, also, the second convex tendon 72 and the change of the formation cliff of displacement formula of current collector 4, can more effectively improve the ability that vortex is produced.
Embodiment three：
As shown in Figure 10 to Figure 12, the vortex generator in the present embodiment is towards going out located at cooking-fume exhauster blower snail tongue 5
The 3rd convex tendon 73 on the side of fan housing 6.Adjacent 3rd convex tendon 73 of each two in 3rd convex tendon 73 is in fluid passage
The splayed configuration structure that the flow direction of fluid is opened.Also, in order to improve the ability that vortex is produced, two mutually in splayed configuration
The scope of angle D between the 3rd convex tendon 73 opened is 0 ° of ＜ D≤45 °.It can be seen that, the vortex generator is constituted to be vortexed by expansion
Generator, is particularly suitable for application the local sudden expansion region between volute outlet and outlet housing 6.
In addition, the structure of the 3rd convex tendon 73 in the present embodiment is identical with the structure of the second convex tendon 72 in embodiment two,
Description is not deployed herein.
Claims (4)
1. a kind of range hood with noise reducing mechanism, provided with local sudden expansion in the fluid passage inside the range hood,
Described noise reducing mechanism is to be arranged in the direction of flow of the local sudden expansion and sent out for the vortex for producing additional whirlpool boundary layer
Raw device, described vortex generator is the convex tendon (7) on the passage component (8) for being arranged on local sudden expansion to flow end, and its feature exists
In：The front side enclosed in impeller (3) front end of range hood is provided with current collector (4), and described vortex generator is along current collector
(4) the second convex tendon (72) that internal perisporium is spaced apart.
2. the range hood according to claim 1 with noise reducing mechanism, it is characterised in that：Described the second convex tendon (72)
Triangular in shape, the height h2 of second convex tendon (72) is 3mm≤h2≤10mm, and second convex tendon (72) is close to flowing end
Base angle A angular range is 0 ° of ＜ A≤20 °, and the angular range of the second convex tendon (72) drift angle B is 110 ° of B ＜, also, institute
State remote edges of the base angle C adjacent to the current collector (4) to flow end of the second convex tendon.
3. the range hood according to claim 2 with noise reducing mechanism, it is characterised in that：Second convex tendon (72)
Width w2 is 1mm≤w2≤10mm.
4. the range hood according to claim 3 with noise reducing mechanism, it is characterised in that：Second convex tendon (72)
Width w2 gradually increases from top to bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610031338.2A CN105485743B (en) | 2016-01-15 | 2016-01-15 | A kind of range hood with noise reducing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610031338.2A CN105485743B (en) | 2016-01-15 | 2016-01-15 | A kind of range hood with noise reducing mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105485743A CN105485743A (en) | 2016-04-13 |
| CN105485743B true CN105485743B (en) | 2017-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610031338.2A Active CN105485743B (en) | 2016-01-15 | 2016-01-15 | A kind of range hood with noise reducing mechanism |
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| CN (1) | CN105485743B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106322474B (en) * | 2016-08-28 | 2019-04-19 | 杭州老板电器股份有限公司 | A kind of water conservancy diversion sound-absorbing solid noise reduction system of kitchen ventilator |
| CN110094370B (en) * | 2019-04-26 | 2021-08-20 | 宁波方太厨具有限公司 | A range hood that is used for range hood's collector and has this collector |
| CN115435362A (en) * | 2022-09-01 | 2022-12-06 | 杭州老板电器股份有限公司 | Reversing and flow guiding device for air outlet of range hood and integrated stove |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2930972B1 (en) * | 2008-05-07 | 2012-11-30 | Airbus France | DOUBLE FLOW TURBOMACHINE FOR AIRCRAFT WITH REDUCED NOISE TRANSMISSION |
| ES2427831T3 (en) * | 2008-12-10 | 2013-11-04 | Electrolux Home Products Corporation N.V. | Suction hood |
| CN201588817U (en) * | 2009-12-08 | 2010-09-22 | 美的集团有限公司 | Centrifugal fan for range hood |
| US20150010407A1 (en) * | 2013-07-08 | 2015-01-08 | Alonso O. Zamora Rodriguez | Reduced noise vortex generator for wind turbine blade |
| CN203796681U (en) * | 2013-12-31 | 2014-08-27 | 中国科学院工程热物理研究所 | Vortex generator structure for boundary layer separation under inhibitory shock wave effect |
| US9476406B2 (en) * | 2014-04-14 | 2016-10-25 | Siemens Aktiengesellschaft | Vortex generators aligned with trailing edge features on wind turbine blade |
| CN104196761A (en) * | 2014-08-22 | 2014-12-10 | 广东海信家电有限公司 | Double-air-inlet centrifugal fan |
| CN104296219B (en) * | 2014-11-07 | 2016-08-17 | 郭军 | A kind of smoke exhaust ventilator with rectification function |
| CN205560900U (en) * | 2016-01-15 | 2016-09-07 | 宁波方太厨具有限公司 | Range hood with mechanism that makes an uproar falls |
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2016
- 2016-01-15 CN CN201610031338.2A patent/CN105485743B/en active Active
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| CN105485743A (en) | 2016-04-13 |
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