CN208536094U - Variable cross-section air duct and range hood - Google Patents
Variable cross-section air duct and range hood Download PDFInfo
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- CN208536094U CN208536094U CN201821183235.9U CN201821183235U CN208536094U CN 208536094 U CN208536094 U CN 208536094U CN 201821183235 U CN201821183235 U CN 201821183235U CN 208536094 U CN208536094 U CN 208536094U
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Abstract
The utility model provides a kind of variable cross-section air duct and range hood, it is related to range hood technical field, cross-section air duct is used to solve existing kitchen ventilator, loss when air is by the cross-section air duct and air outlet is larger, the technical problem for causing the smoking effect of range hood undesirable.It is related to a kind of variable cross-section air duct, including spiral case ontology, spiral case ontology includes for enclosing the air duct foreboard for being set as air duct, air duct back plate and the air duct coaming plate that the two links together；Air duct includes the outlet section with air outlet, and air duct foreboard and air duct back plate are formed by outlet air bore at outlet section and gradually expand outward along axis air-out direction.Further relate to a kind of range hood, comprising: above-mentioned variable cross-section air duct.The variable cross-section air duct and range hood can be such that the kinetic energy of gas increases, and flow velocity is accelerated, to increase air duct flow.
Description
Technical field
The utility model relates to range hood technical fields, more particularly, to a kind of variable cross-section air duct and range hood.
Background technique
Range hood is a kind of kitchen appliance for purifying kitchen environment.Domestic cooking fume remover is substantially using centrifugation wind at present
Machine.Wherein, centrifugal blower is the core component of entire range hood, and the quality of centrifugal blower performance determines the property of range hood
Can, it is one of the core competitiveness of smoke machine product.
The casing of existing centrifugal blower is mainly made of spiral case, impeller and volute tongue.Generally, the work of centrifugal blower is former
Reason are as follows: the high speed rotation in spiral case of the impeller with multiple blades can accelerate the gas for entering the blade, Jin Erzeng
Add gas dynamic pressure, spiral case is used to collect the gas come out from impeller, and directs it to the air outlet of spiral case, so that gas is defeated
It is sent in pipeline.
Currently, what range hood in the market generallyd use is prismatic air duct.Such range hood is at work, empty
Loss when gas is by cross-section air duct is larger, and the loss at air outlet is more obvious.
It in the prior art can only be right in order to guarantee that range hood has corresponding smoking effect for above-mentioned range hood
The size of the components such as air duct, impeller, motor is increased, and both increases cost in this way, wastes resource.Simultaneously as will
The larger of components, this is but also range hood needs biggish installation space, for a user, not only unsightly,
And it operates and is also likely to be present many inconvenience.
Utility model content
The first of the utility model is designed to provide a kind of variable cross-section air duct, uses cross-section to solve existing kitchen ventilator
Air duct, loss when air is by the cross-section air duct and air outlet is larger, causes the smoking effect of range hood undesirable
The technical issues of.
Variable cross-section air duct provided by the utility model, comprising: spiral case ontology, the spiral case ontology includes being set as wind for enclosing
Air duct foreboard, air duct back plate and the air duct coaming plate that the two links together in road.
The air duct includes the outlet section with air outlet, and the air duct foreboard and the air duct back plate are in the outlet section
Place is formed by outlet air bore and gradually expands outward along axis air-out direction, forms diffusion structure.
Further, the diffusion structure includes the first diffusion portion for being located at the air duct foreboard and being inclined outwardly, and
The the second diffusion portion for being located at the air duct back plate and being inclined outwardly.
Further, the angular range that first diffusion portion and second diffusion portion are inclined outwardly is 10~30 °.
Further, the air duct foreboard and the air duct back plate are formed by outlet air bore along axis at the outlet section
Line air-out direction is constant, forms structure of voltage regulation.
The structure of voltage regulation is located at the diffusion structure close to the side of the air outlet.
Further, the one end of first diffusion portion and second diffusion portion far from the air outlet with volute tongue water
It puts down tangent.
Further, first diffusion portion and second diffusion portion are total far from plane where one end of the air outlet
Face setting, and the plane is the tapered plane being arranged horizontal by angle.
Further, the spiral case ontology is equipped with chamfering structure far from the bottom end of the outlet section.
Further, the diffusion structure is located at close to the position of the air outlet.
Further, the air outlet is equipped with connecting plate.
Variable cross-section air duct provided by the utility model the utility model has the advantages that
In the variable cross-section air duct, air duct foreboard, air duct back plate and air duct coaming plate that the two links together are common
The spiral case ontology for being set as having air duct is enclosed, which includes outlet section, since air duct foreboard and air duct back plate are in outlet section place
The outlet air bore of formation gradually expands outward along axis air-out direction, forms diffusion structure, which can make herein
Duct cross-section relative increase changes the sectional dimension in air duct, thus when gas passes through the air duct at this, on the one hand, energy
Enough increase the kinetic energy of gas；On the other hand, the static pressure in air duct can be made to be converted to dynamic pressure, to reduce the gas in air duct
Body flow loss.
Furthermore in the variable cross-section air duct, which has air outlet, which is applied in blower,
Gas accelerates the gas for entering blade under the effect of high-speed rotating impeller, thus increase gas dynamic pressure, spiral case ontology
The gas come out from impeller is collected, and guides it to air outlet, during gas is by outlet section, in the variable cross-section air duct
Diffusion structure the kinetic energy of gas can be made to further increase；Since the variable cross-section air duct can flow through gas phase pair herein
It increased in the gas kinetic energy for flowing through existing air duct, it is thus possible to accelerate the flow velocity of gas, increase accordingly air duct flow,
To improve the smoking effect of range hood.
In addition, when the variable cross-section air duct is applied in blower, in the base of the size without increasing the components such as impeller, motor
On plinth, it will be able to guarantee corresponding smoking effect, thus provide further relative savings of cost and resource, be worthy to be popularized and apply.
The second of the utility model is designed to provide a kind of range hood, uses cross-section wind to solve existing kitchen ventilator
Road, loss when air is by the cross-section air duct and air outlet is larger, causes the smoking effect of range hood undesirable
Technical problem.
Range hood provided by the utility model, comprising: above-mentioned variable cross-section air duct.
Range hood provided by the utility model the utility model has the advantages that
It include above-mentioned variable cross-section air duct in the range hood, wherein the specific structure in the variable cross-section air duct, connection relationship
And beneficial effect etc. is described in detail in above-mentioned text, details are not described herein.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the schematic perspective view in the variable cross-section air duct that the utility model embodiment one provides；
Fig. 2 is the main view in variable cross-section air duct shown in Fig. 1；
Fig. 3 is the side view in variable cross-section air duct shown in Fig. 1；
Fig. 4 is the structural schematic diagram in the variable cross-section air duct that the utility model embodiment two provides；
Fig. 5 is the structural schematic diagram in the variable cross-section air duct that the utility model embodiment three provides；
Fig. 6 is the side view in variable cross-section air duct shown in Fig. 5；
Fig. 7 is the structural schematic diagram in the variable cross-section air duct that the utility model embodiment four provides.
Icon: the air duct 100- foreboard；The air duct 200- back plate；The air duct 300- coaming plate；The outlet section 400-；500- volute tongue；600-
Chamfering structure；700- connecting plate；
410- air outlet；420- diffusion structure；
The first diffusion of 421- portion；The second diffusion of 422- portion；The first vertical portion 423-；The second vertical portion 424-.
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described
Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally
Field those of ordinary skill all other embodiment obtained without making creative work belongs to practical
Novel protected range.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the utility model and simplify description, rather than the mechanism of indication or suggestion meaning or element must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the
One ", " second " is used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
Embodiment one
As shown in Figure 1 to Figure 3, the present embodiment one provides a kind of variable cross-section air duct, comprising: spiral case ontology, spiral case ontology
Including for enclosing the air duct foreboard 100 for being set as air duct, air duct back plate 200 and the air duct coaming plate 300 that the two links together；
Air duct includes the outlet section 400 with air outlet 410, and air duct foreboard 100 and air duct back plate 200 are formed at outlet section 400
Outlet air bore gradually expanded outward along axis air-out direction, formed diffusion structure 420.
In the variable cross-section air duct, air duct foreboard 100, air duct back plate 200 and the air duct that the two links together are enclosed
Plate 300 encloses the spiral case ontology for being set as having air duct jointly, which includes outlet section 400, behind air duct foreboard 100 and air duct
Plate 200 is formed by outlet air bore at outlet section 400 and gradually expands outward along axis air-out direction, forms diffusion structure 420,
The diffusion structure 420 can make duct cross-section relative increase herein, that is, change the sectional dimension in air duct, thus pass through in gas
When crossing the air duct at this, on the one hand, the kinetic energy of gas can be made to increase；On the other hand, the static pressure in air duct can be made to be converted to
Dynamic pressure, to reduce the gas flow loss in air duct.
Furthermore the outlet section 400 has air outlet 410, which is applied to blower (such as: centrifugal blower)
In, gas accelerates the gas for entering blade under the effect of high-speed rotating impeller, thus increase gas dynamic pressure, spiral case
Ontology collects the gas come out from impeller, and guides it to air outlet 410, during gas is by outlet section 400, the change
Diffusion structure 420 in the air duct of section can be such that the kinetic energy of gas further increases；Since the variable cross-section air duct can flow through
Gas phase herein increased for flowing through the gas kinetic energy in existing air duct, it is thus possible to accelerate the flow velocity of gas, accordingly
Air duct flow is increased, to improve the smoking effect of range hood.
In addition, when the variable cross-section air duct is applied in blower, in the base of the size without increasing the components such as impeller, motor
On plinth, it will be able to guarantee corresponding smoking effect, thus provide further relative savings of cost and resource, be worthy to be popularized and apply.
Please continue to refer to Fig. 2 and Fig. 3, diffusion structure 420 includes diffusion portion；Wherein, diffusion portion includes being located at air duct foreboard
100 and the first diffusion portion 421 for being inclined outwardly, and the second diffusion portion 422 for being located at air duct back plate 200 and being inclined outwardly.
Wherein, the first diffusion portion 421, the second diffusion portion 422 and part air duct coaming plate 300 enclose and are set as diffusion structure 420.
It should be noted that in the diffusion structure 420, the first diffusion portion 421 and the second diffusion portion 422 be oppositely arranged and
The structure of the two is identical, and the two is to be inclined outwardly the hang plate structure of setting.
It should be noted that " outside " above-mentioned and be subsequently noted is under opposite variable cross-section air duct state shown in Fig. 1
For, wherein refer to the direction away from internal air duct outward.
On the basis of the above embodiments, as shown in figure 3, what the first diffusion portion 421 and the second diffusion portion 422 were inclined outwardly
Angle is a.
It should be noted that " angle a " herein be under opposite variable cross-section air duct state shown in Fig. 1 for, wherein
Angle a refer to the first diffusion portion 421 or the second diffusion portion 422 respectively with the acute angle of vertical direction.
In the embodiment, the range of a is 10~30 °.
Wherein, the angular range of above-mentioned setting is best angle range, that is to say, that in the angular range of above-mentioned setting
Interior, the range hood equipped with the variable cross-section air duct can have preferably smoking effect.
In the embodiment, air duct foreboard 100 and air duct back plate 200 are formed by outlet air bore along axis at outlet section 400
Line air-out direction is constant, forms structure of voltage regulation；Structure of voltage regulation is located at diffusion structure 420 close to the side of air outlet 410.
Specifically, please continue to refer to Fig. 3, structure of voltage regulation includes the vertical portion with diffusion portion in angle setting.Wherein, vertically
Portion includes the first vertical portion 423 being connected with the first diffusion portion 421 and the second vertical portion 424 for being connected with the second diffusion portion 422.
Wherein, the first vertical portion 423 and the second vertical portion 424 are oppositely arranged and the structure of the two is identical.
In the embodiment, straight panel structure that the first vertical portion 423 and the second vertical portion 424 are vertically arranged.It needs
It is bright, " being vertically arranged " herein be under opposite variable cross-section air duct state shown in Fig. 1 for.
In the embodiment, the setting of the first vertical portion 423 and the second vertical portion 424 can arrive the effect for playing turbulent flow.
Specifically, the structure can the acceleration air-flow to air outlet 410 have preferable buffer function, prevent because of outlet section 400
Changes of section or mutation caused by flow or the pressure loss, thus can preferably promote the flow and pressure in air duct.In addition,
This is relatively simple for structure, easy to manufacture, processing.
In the embodiment, sectional dimension of the air duct between the first diffusion portion 421 and the second diffusion portion 422 first gradually expands
Greatly, then sectional dimension of the air duct between the first vertical portion 423 and the second vertical portion 424 remains unchanged.
As shown in Fig. 2, the first diffusion portion 421 and second one end of diffusion portion 422 far from air outlet 410 with volute tongue 500
It is horizontal tangent.In this kind of structure type, diffusion structure 420 can carry out processing and fabricating by simple stretch forming process, and
And it can guarantee the optimization of its performance.
It is pressure maximum position, the first diffusion portion 421 and the second diffusion portion 422 before non-diffusion at M please continue to refer to Fig. 2
Setting can reduce the windage loss in air duct, the static pressure of air-flow can be made to change into dynamic pressure, to increase the gas flow in air duct.
On the basis of the above embodiments, as shown in Figure 1, air outlet 410 is equipped with connecting plate 700.
Wherein, connecting plate 700 can be welded on by welding at air outlet 410, and which can make between the two
It connects more stable, reliable.
Either, both connecting plate 700 and air outlets 410 are set as detachable and are fixedly connected with mode.
Such as: the two passes through screw, is bolted together；Either, it links together with the placement for crossing riveting.
Embodiment two
The present embodiment two also provides a kind of variable cross-section air duct, which includes and name of parts in embodiment one
The components all the same such as title, working principle, structure and the variable cross-section air duct of above-described embodiment one are essentially identical, difference
Place is as described below.
In the embodiment, as shown in figure 4, the first diffusion portion 421 and second one end of diffusion portion 422 far from air outlet 410
The setting of place co-planar, and the plane is the tapered plane being arranged horizontal by angle.
That is, in the embodiment two, the first diffusion portion 421 and the second diffusion portion 422 far from air outlet 410 one
End is not horizontal tangent (and being horizontal tangent in embodiment one) with volute tongue 500.
As known from the above, for variable cross-section air duct, the first diffusion portion 421 and the second diffusion portion 422 are far from air outlet
410 one end can either specifically can not with volute tongue 500 horizontal tangent (such as Fig. 4) with volute tongue 500 horizontal tangent (such as Fig. 2)
According to the needs of use and other requirements are using corresponding setting.
Embodiment three
The present embodiment three also provides a kind of variable cross-section air duct, which includes and name of parts in embodiment one
The components all the same such as title, working principle, structure and the variable cross-section air duct of above-described embodiment one are essentially identical, difference
Place is as described below.
In the embodiment, as shown in Figure 5 and Figure 6, spiral case ontology is equipped with chamfering structure far from the bottom end of outlet section 400
600。
In this kind of structure type, chamfering structure 600 is set far from the bottom end of outlet section 400 by spiral case ontology, when
When gas flows through the structure, be conducive to the airflow smooth in internal air duct, certain guide functions can be played.
Example IV
The present embodiment four also provides a kind of variable cross-section air duct, which includes and name of parts in embodiment one
The components all the same such as title, working principle, structure and the variable cross-section air duct of above-described embodiment one are essentially identical, difference
Place is as described below.
In the embodiment, as shown in fig. 7, diffusion structure 420 is located at close to the position of air outlet 410.
It should be noted that first diffusion portion 421 and the second diffusion portion 422 are in the vertical direction in the embodiment three
Size (height) be less than embodiment one in the size of the first diffusion portion 421 and the second diffusion portion 422 in the vertical direction.
Embodiment five
As shown in Figures 1 to 7, the present embodiment five provides a kind of range hood, which includes: such as above-mentioned implementation
Variable cross-section air duct in example one, embodiment two, embodiment three or example IV.
It include above-mentioned variable cross-section air duct in the range hood, wherein the specific structure in the variable cross-section air duct, connection relationship
And beneficial effect etc. is described in detail in above-mentioned text, details are not described herein.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited
System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should
Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of
Technical characteristic is equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new
The range of each embodiment technical solution of type.
Claims (10)
1. a kind of variable cross-section air duct characterized by comprising spiral case ontology, the spiral case ontology includes being set as air duct for enclosing
Air duct foreboard (100), air duct back plate (200) and the air duct coaming plate (300) that the two links together；
The air duct includes the outlet section (400) with air outlet (410), the air duct foreboard (100) and the air duct back plate
(200) outlet air bore is formed by the outlet section (400) to gradually expand outward along axis air-out direction, form diffusion knot
Structure (420).
2. variable cross-section air duct according to claim 1, which is characterized in that the diffusion structure (420) is described including being located at
Air duct foreboard (100) and the first diffusion portion (421) being inclined outwardly, and be located at the air duct back plate (200) and be inclined outwardly
The second diffusion portion (422).
3. variable cross-section air duct according to claim 2, which is characterized in that first diffusion portion (421) and described second
The angular range that diffusion portion (422) is inclined outwardly is 10~30 °.
4. variable cross-section air duct according to claim 1, which is characterized in that after the air duct foreboard (100) and the air duct
It is constant along axis air-out direction that plate (200) is formed by outlet air bore at the outlet section (400), forms structure of voltage regulation；
The structure of voltage regulation is located at side of the diffusion structure (420) close to the air outlet (410).
5. variable cross-section air duct according to claim 2 or 3, which is characterized in that first diffusion portion (421) and described
The one end of two diffusion portions (422) far from the air outlet (410) is horizontal tangent with volute tongue (500).
6. variable cross-section air duct according to claim 2 or 3, which is characterized in that first diffusion portion (421) and described
Two diffusion portions (422) far from the air outlet (410) one end where co-planar setting, and the plane be horizontal by
The tapered plane of angle setting.
7. variable cross-section air duct according to claim 1-4, which is characterized in that the spiral case ontology goes out far from described in
The bottom end in wind portion (400) is equipped with chamfering structure (600).
8. variable cross-section air duct according to claim 1-4, which is characterized in that the diffusion structure (420) is located at
Close to the position of the air outlet (410).
9. variable cross-section air duct according to claim 8, which is characterized in that the air outlet (410) is equipped with connecting plate
(700)。
10. a kind of range hood characterized by comprising such as the described in any item variable cross-section air ducts the claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821183235.9U CN208536094U (en) | 2018-07-25 | 2018-07-25 | Variable cross-section air duct and range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821183235.9U CN208536094U (en) | 2018-07-25 | 2018-07-25 | Variable cross-section air duct and range hood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208536094U true CN208536094U (en) | 2019-02-22 |
Family
ID=65385444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821183235.9U Active CN208536094U (en) | 2018-07-25 | 2018-07-25 | Variable cross-section air duct and range hood |
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| CN (1) | CN208536094U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108561938A (en) * | 2018-07-25 | 2018-09-21 | 杭州老板电器股份有限公司 | Variable cross-section air duct and range hood |
| CN113513501A (en) * | 2021-04-02 | 2021-10-19 | 宁波方太厨具有限公司 | Volute for range hood, fan system and range hood |
-
2018
- 2018-07-25 CN CN201821183235.9U patent/CN208536094U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108561938A (en) * | 2018-07-25 | 2018-09-21 | 杭州老板电器股份有限公司 | Variable cross-section air duct and range hood |
| CN113513501A (en) * | 2021-04-02 | 2021-10-19 | 宁波方太厨具有限公司 | Volute for range hood, fan system and range hood |
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