CN116951509A - Flow guiding structure and range hood - Google Patents
Flow guiding structure and range hood Download PDFInfo
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- CN116951509A CN116951509A CN202311092169.XA CN202311092169A CN116951509A CN 116951509 A CN116951509 A CN 116951509A CN 202311092169 A CN202311092169 A CN 202311092169A CN 116951509 A CN116951509 A CN 116951509A
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- 238000013461 design Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 description 18
- 230000000694 effects Effects 0.000 description 10
- 239000000779 smoke Substances 0.000 description 7
- 230000002401 inhibitory effect Effects 0.000 description 6
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- 230000000391 smoking effect Effects 0.000 description 2
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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
Abstract
The invention relates to the technical field of household appliances and discloses a flow guiding structure and a range hood. The flow guiding structure can enable air flow to be smoother, inhibit vortex formation and reduce air flow loss, so that air inlet quantity is increased, pneumatic noise at an air inlet can be reduced, user experience is better, the flow guiding structure comprises at least one curve section along the length direction, and flexibility of flow guiding structure design and manufacturing is improved, so that different use requirements are met. The air guide structure is of a plate-shaped structure and is arranged on the inner wall of the air duct, the cross section of the air guide structure perpendicular to the length direction of the air guide structure is a curve cross section, the air guide structure comprises at least one curve cross section along the length direction of the air guide structure, the curve cross section comprises an arc section, and the arc section is arranged close to an air inlet of the air duct.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to a flow guiding structure and a range hood.
Background
A range hood (also called a range hood or a range hood) is a kitchen appliance for purifying the kitchen environment. The range hood is usually arranged above or at the side rear of a kitchen range, can rapidly pump away waste generated by combustion of the range and oil smoke generated in the cooking process, is discharged out of a room, and simultaneously condenses and collects the oil smoke, so that pollution is reduced, and the aim of purifying air is fulfilled.
Along with the continuous change of user's demand, the model of range hood also constantly pushes out newly, gradually to the direction development that the fuselage is thin, the mouth of a cigarette is submerged, but the fuselage is thinner, can compress inside wind channel space more, leads to the effective air inlet face in wind channel to reduce, not only influences the amount of wind of range hood, can increase the range hood noise moreover, influences user experience.
Disclosure of Invention
In view of the above, the invention provides a flow guiding structure and a range hood, so as to solve the problems of small air quantity and large noise of the existing range hood.
In a first aspect, the present invention provides a flow guiding structure, which is a plate-shaped structure and is disposed on an inner wall of an air duct, wherein a cross section of the flow guiding structure perpendicular to a length direction of the flow guiding structure is a curved cross section, the flow guiding structure includes at least one curved cross section along the length direction of the flow guiding structure, and the curved cross section includes:
and the arc-shaped section is arranged close to the air inlet of the air duct.
The beneficial effects are that: the cross section perpendicular to the length direction of the flow guiding structure is a curve cross section, at least one curve cross section is included along the length direction of the flow guiding structure, the curve cross section comprises an arc section, and the arc section is arranged close to an air inlet of an air duct. The flow guiding structure can enable air flow to be smoother, inhibit vortex formation and reduce air flow loss, so that air inlet quantity is increased, pneumatic noise at an air inlet can be reduced, and user experience is better. The flow guiding structure comprises at least one curve section along the length direction, so that the flexibility of the design and the manufacture of the flow guiding structure is increased to meet different use requirements.
In an alternative embodiment, the curved section further comprises a connecting section, which is connected to the arcuate section and is arranged remote from the air inlet.
The beneficial effects are that: according to the flow guiding structure, the connecting section is arranged, so that the flow guiding structure is convenient to connect with the inner wall of the air duct, and the structure is convenient to arrange.
In an alternative embodiment, the line profile of the arcuate segment is determined from a second order Bezier curve.
The beneficial effects are that: according to the flow guiding structure, the line type of the arc-shaped section is determined according to the second-order Bezier curve, so that the flow guiding structure can effectively smooth air flow, inhibit vortex formation and reduce air flow loss, and accordingly the effects of increasing air quantity and reducing aerodynamic noise at an air inlet are achieved.
In an alternative embodiment, the initial control point P of the arcuate segment 0 The second control point P of the arc-shaped section is connected with the edge of the air inlet 2 And connecting the connecting sections.
The beneficial effects are that: the invention relates to a diversion structure, which comprises an initial control point P of an arc-shaped section 0 The edge of the air inlet is connected, so that the flow guiding structure can be positioned in an air flow angle area, and the purposes of smoothing air flow, inhibiting vortex formation, reducing air flow loss, increasing air quantity and reducing pneumatic noise at the air inlet are further realized.
In an alternative embodiment, the flow guiding structure is located above the air inlet, the initial control point P 0 Is connected with the upper edge of the air inlet.
The beneficial effects are that: when the flow guiding structure is applied to the range hood, the air flow angle area is arranged above the air inlet, and the flow guiding structure is positioned in the air flow angle area, so that smooth air flow can be achieved, vortex formation is restrained, air flow loss is reduced, air quantity is increased, and pneumatic noise at the air inlet is reduced.
In an alternative embodiment, the highest point of the arc-shaped section bulge is a first control point P 1 The connecting section is provided with a third control point P 3 The third control point P 3 Is connected with the inner wall of the air duct.
The beneficial effects are that: the flow guiding structure of the invention has a connecting section with a third control point P 3 Third control point P 3 Connect the wind channel inner wall to the water conservancy diversion structure is connected with the wind channel inner wall, improves the convenience that sets up the water conservancy diversion structure, also makes the water conservancy diversion structure more firm stable with the connection of wind channel inner wall.
In an alternative embodiment, the initial control point P 0 Is the coordinates of (a)(0,0)；
The first control point P 1 Is (h, l) 1 )；
The second control point P 2 The coordinates of (1) 2 ·sinδ，b-l 2 ·cosδ)；
The third control point P 3 The coordinates of (a) are (0, b);
wherein h is the height of the protrusion of the arc-shaped section, l 1 For the first control point P 1 With the initial control point P 0 Is a vertical distance of l 2 For the second control point P 2 And the third control point P 3 Delta is the included angle between the horizontal direction and the straight line connecting the second control point P2 and the third control point P3, and b is the height of the flow guiding structure.
The beneficial effects are that: the diversion structure of the invention passes through the initial control point P of the coordinates 0 First control point P 1 Second control point P 2 Third control point P 3 The flow guiding structure can be drawn and manufactured according to the second-order Bezier curve, and has the beneficial effects of smoothing airflow, inhibiting vortex formation, reducing gas flow loss, increasing air inlet quantity and reducing pneumatic noise at the air inlet.
In an alternative embodiment, the width of the air duct is l 0 ；
The height h of the protrusion of the arc-shaped section is [0.35,0.5 ]]×l 0 ；
The first control point P 1 With the initial control point P 0 Is a vertical distance l of (2) 1 Is [0.3,0.4]×b；
The second control point P 2 And the third control point P 3 Straight line distance l of (2) 2 Is [5mm, 0.7Xh ]]。
The beneficial effects are that: in the diversion structure of the invention, the height h of the protrusion of the arc-shaped section and the first control point P 1 With the initial control point P 0 Is a vertical distance l of (2) 1 A second control point P 2 And a third control point P 3 Straight line distance l of (2) 2 Can ensure the guideThe flow structure straightens the air flow, so that the air flow is smoother, vortex formation is restrained, the air flow loss is reduced, the air inlet quantity is increased, and the pneumatic noise at the air inlet is reduced.
In an alternative embodiment, the included angle delta between the horizontal direction and the straight line connecting the second control point P2 and the third control point P3 ranges from 10 ° to 14 °.
The beneficial effects are that: according to the flow guiding structure, the value range of the included angle delta can ensure that the flow guiding structure straightens air flow, enables air flow to be smoother, inhibits vortex formation, reduces air flow loss, increases air inlet quantity and reduces pneumatic noise at an air inlet.
In an alternative embodiment, the connecting section is a straight section.
The beneficial effects are that: according to the flow guide structure, the connecting section is preferably arranged to be a straight line section, so that on one hand, the processing difficulty is low, the production cost is reduced, on the other hand, the connecting section is convenient to connect with the inner wall of the air duct, and the connecting position is firmer.
In an alternative embodiment, the length L of the flow guiding structure is the same as the width of the air inlet.
The beneficial effects are that: the length L of the flow guiding structure is the same as the width of the air inlet, so that the flow guiding structure can fully cover the effective air inlet area of the air inlet, and the air entering the air inlet can pass through the flow guiding structure, thereby ensuring the flow guiding of the flow guiding structure on the air inlet in the air channel, inhibiting vortex and reducing noise.
In an alternative embodiment, a cavity is formed between the flow guiding structure and the inner wall of the air duct.
The beneficial effects are that: according to the flow guide structure, the cavity is formed between the flow guide structure and the inner wall of the air duct, and can generate cavity resonance for noise and absorb a certain amount of noise, so that the noise reduction effect of the flow guide structure is enhanced.
In an alternative embodiment, the flow guiding structure comprises a flow guiding plate, and a flow guiding plate sound absorbing hole is formed on the flow guiding plate.
The beneficial effects are that: according to the flow guide structure, the sound absorption holes of the flow guide plate are formed in the flow guide plate, so that noise in the air inlet and the air duct can be further absorbed, and the noise reduction effect is further improved.
In a second aspect, the invention also provides a range hood, and the inner wall of an air duct of the range hood is provided with the flow guide structure.
Because the range hood comprises the flow guiding structure, the range hood has the same beneficial effects as the flow guiding structure, and therefore, the range hood is not repeated.
In an alternative embodiment, the flow guiding structure is arranged in an air flow corner area in the air duct.
The beneficial effects are that: the range hood of the invention is provided with the flow guiding structure in the air flow folding angle area in the air duct, and the air flow folding angle area generates vortex which is easy to block the air duct and reduce the air inlet area and generates larger noise.
In an alternative embodiment, an angle δ between a straight line connecting the second control point P2 and the third control point P3 in the flow guiding structure and the horizontal direction is equal to an angle between the oil guiding plate of the range hood and the horizontal direction.
The beneficial effects are that: according to the range hood, the included angle delta between the straight line connecting the second control point P2 and the third control point P3 and the horizontal direction is equal to the included angle between the oil guide plate of the range hood and the horizontal direction, so that the guiding effect of the guiding structure on the air flow is optimal, the flow loss of the air flow is effectively reduced by inhibiting vortex, the air quantity of the range hood is increased, and the pneumatic noise at the air inlet is reduced.
In an alternative embodiment, the height b of the flow guiding structure is the same as the panel height of the range hood.
The beneficial effects are that: the height b of the flow guiding structure of the range hood is the same as the panel height of the range hood, the structural space of the range hood can be fully utilized, and the flow guiding structure with more matched structural proportion is arranged, so that the flow guiding effect of the flow guiding structure is further enhanced, vortex is restrained, and noise at an air inlet is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of a range hood without a flow guiding structure in the prior art;
FIG. 2 is an enlarged schematic view of portion A of FIG. 1;
FIG. 3 is a schematic view of the airflow in a range hood without a flow guiding structure according to the prior art;
FIG. 4 is a schematic view of a flow guiding structure according to the present invention;
FIG. 5 is an enlarged schematic view of portion B of FIG. 4;
FIG. 6 is a side view of a flow directing structure of the present invention;
fig. 7 is a schematic view of a range hood according to the present invention;
fig. 8 is a schematic view of the airflow in the range hood according to the present invention.
Reference numerals illustrate:
1. an air duct; 101. an air inlet;
2. a deflector; 201. an arc section; 202. a connection section; 203. a cavity;
3. a case; 4. an impeller; 5. a motor; 6. a volute; 7. a smoke baffle; 8. an oil guide plate; 9. an air flow corner region; 10. a panel.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 to 3, a range hood on the market comprises a box body 3, a volute 6 is arranged in the box body 3, a motor 5 and an impeller 4 are arranged above the volute 6, and an output shaft of the motor 5 is connected with the impeller 4 to drive the impeller 4 to rotate, so that suction force is generated. The air duct 1 (air inlet duct) is further arranged in the box body 3, the air duct 1 is provided with an air inlet 101, the air inlet 101 is formed in the box body 3, the outer wall of the box body 3 is provided with a smoke baffle 7, the smoke baffle 7 is arranged close to the upper side of the air inlet 101 and is inclined downwards, the air duct 1 is internally provided with an oil guide plate 8 close to the air inlet 101, and the oil guide plate 8 is inclined downwards.
In fig. 2 and fig. 3, the direction of the arrow is the air flow direction, no flow guiding structure is arranged in the air duct 1 of the range hood, when the motor 5 drives the impeller 4 to rotate, external air is sucked into the air duct 1 from the air inlet 101, an air flow folding angle alpha is formed above the air inlet 101, no air flow flows through an air flow folding angle area 9 above the air inlet 101, when air flow flows in the air duct 1 to generate air pressure difference, the air flow flows towards the air flow folding angle area 9, so that vortex flow is generated in the air flow folding angle area 9, the air duct air inlet 101 is blocked by the vortex flow, the effective air inlet area of the air inlet 101 is reduced, the air inlet quantity and smoking efficiency of the range hood are influenced, and the pneumatic noise at the air inlet 101 is increased, so that the user experience is poor.
Embodiments of the present invention flow guiding structure and range hood are described below with reference to fig. 4-8.
According to an embodiment of the present invention, in one aspect, there is provided a flow guiding structure having a plate-like structure and disposed on an inner wall of an air duct 1, wherein a cross section of the flow guiding structure perpendicular to a length direction thereof is a curved cross section, the flow guiding structure includes at least one curved cross section along the length direction thereof, and the curved cross section includes: the arc-shaped section 201, the arc-shaped section 201 is arranged close to the air inlet 101 of the air duct.
The flow guiding structure of the embodiment can enable air flow to be smoother, inhibit vortex formation and reduce air flow loss, so that air inlet quantity is increased, pneumatic noise at an air inlet can be reduced, and user experience is better. The flow guiding structure comprises at least one curve section along the length direction, so that the flexibility of the design and the manufacture of the flow guiding structure is increased to meet different use requirements.
The whole flow guiding structure is a plate-shaped structure, namely the flow guiding plate 2, the flow guiding plate 2 has a certain length, a certain width and a certain height, and the specific size of the flow guiding structure is selected according to the actual setting position of the flow guiding structure. The flow guiding structure is arranged on the inner wall of the air duct 1 and used for guiding the air flow direction, so that the air flow can flow more smoothly, and vortex generation is inhibited.
The cross section of the flow guiding structure perpendicular to the length direction is a curve cross section, and the flow guiding structure comprises at least one curve cross section along the length direction. That is, when the flow guiding structure includes two or more curved sections along the length direction thereof, the cross-sectional shape of the flow guiding structure perpendicular to the length direction thereof is not unique, but is a curved section, for example: when the flow guiding structure comprises two curve sections along the length direction, the flow guiding structure is divided into two sections along the length direction, namely a first flow guiding structure section and a second flow guiding structure section, the section shapes of the first flow guiding structure section and the second flow guiding structure section perpendicular to the length direction are all curve sections, but the shapes of the first flow guiding structure section and the second flow guiding structure section are different, and the connection part between the first flow guiding structure section and the second flow guiding structure section can be smoothly transited through an inclined plane or an arc surface and the like.
In this embodiment, the flow guiding structure comprises a curved cross section along its length direction, i.e. the cross section of the flow guiding structure perpendicular to its length direction is unique.
Further, the curved section further comprises a connecting section 202, the arc-shaped section 201 is arranged close to the air inlet 101 of the air duct 1, the connecting section 202 is connected with the arc-shaped section 201, and the connecting section 202 is arranged far away from the air inlet 101.
The arc-shaped section 201 protrudes towards a direction away from the inner wall of the air duct 1, and the arc-shaped section 201 is arranged close to the air inlet 101 of the air duct, so that air flow entering from the air inlet 101 can immediately contact the arc-shaped section 201 to guide the air flow. One end of the arc-shaped section 201, which is close to the air inlet 101, is connected with the inner wall of the air duct 1, and one end of the arc-shaped section 201, which is far away from the air inlet 101, is connected with the connecting section 202. The connecting section 202 inclines towards the inner wall of the air duct 1, so that one end of the connecting section 202 away from the arc-shaped section 201 is connected with the inner wall of the air duct 1, and the installation of the diversion structure and the inner wall of the air duct is realized.
Further, the connecting section 202 is preferably a straight line section, so that on one hand, the processing difficulty is low, the production cost is reduced, and on the other hand, the connecting section is convenient to connect with the inner wall of the air duct, so that the connecting position is firmer.
Further, the line shape of the arc-shaped segment 201 is determined according to a second-order bezier curve.
The second-order bezier curve (bezier curve) is a quadratic curve, which is formed by two control points and a fixed point (or called initial control point), and a curve is formed by pointing to the control point with the fixed point as a starting point. Compared with the first-order Bezier curve, the second-order Bezier curve has more control points, can draw a smoother curve, and has controllable bending degree. Thus, the arcuate segment 201, defined according to the second order Bezier curve, is smooth in line and smooth in flow, inhibiting vortex formation.
When the flow guiding structure comprises one or more curve sections along the length direction, the cross section shape of the flow guiding structure perpendicular to the length direction is not unique, but is a curve section, and the line type of the arc section 201 of each curve section is determined according to a second-order Bezier curve.
Specifically, the arcuate segment 201 includes initial control points P arranged in sequence 0 First control point P 1 And a second control point P 2 . Initial control point P 0 And a second control point P 2 At two ends of the arc-shaped section 201, a first control point P 1 Is located in the middle of the arc-shaped section 201 and is a first control point P 1 Is the highest point of the protrusion of the arcuate segment 201.
Further, an initial control point P of the arcuate segment 201 0 A second control point P of the arc-shaped section 201 connected with the edge of the air inlet 101 2 The connection section 202 is connected. That is, from the edge of the air inlet 101 toward the direction away from the air inlet 101, the initial control point P 0 First control point P 1 And a second control point P 2 Is sequentially arranged.
Advancing oneThe flow guiding structure is located above the air inlet 101, and the initial control point P 0 Is connected with the upper edge of the air inlet 101.
An air inlet 101 is arranged on one side wall of the air duct 1, a flow guiding structure is arranged on the inner wall of the side wall, the flow guiding structure is positioned above the air inlet 101, and an initial control point P of the arc-shaped section 201 is provided 0 The upper edge of the air inlet 101 is connected to make the arc section 201 as close to the air inlet 101 as possible, so that the air flow entering from the air inlet 101 can contact the flow guiding structure, smooth the air flow, and reduce vortex.
Further, the connection section 202 has a third control point P 3 Third control point P 3 Is connected with the inner wall of the air duct 1.
Third control point P 3 At one end of the connecting section 202 away from the arc-shaped section 201, a second control point P 2 And a third control point P 3 The connection line between the first control point P and the second control point P forms a connection section 202 3 The air duct 1 is connected with the inner wall of the air duct, and the installation of the flow guiding structure and the inner wall of the air duct is realized.
When drawing and designing the arc-shaped section 201 of the curved surface section of the diversion structure, an initial control point P is set first 0 First control point P 1 Second control point P 2 Third control point P 3 As shown in fig. 4, the coordinates of (a) are set:
| control point | X coordinates | Y coordinates |
| P 0 | 0 | 0 |
| P 1 | h | l 1 |
| P 2 | l 2 ·sinδ | b-l 2 ·cosδ |
| P 3 | 0 | b |
Namely:
initial control point P 0 The coordinates of (1) are (0, 0);
first control point P 1 Is (h, l) 1 )；
Second control point P 2 The coordinates of (1) 2 ·sinδ，b-l 2 ·cosδ)；
Third control point P 3 The coordinates of (a) are (0, b);
where h is the protrusion height of the arc segment 201, l 1 For the first control point P 1 With the initial control point P 0 Is a vertical distance of l 2 For the second control point P 2 And a third control point P 3 Delta is the second control point P 2 And a third control point P 3 And b is the height of the flow guiding structure.
Then, determining the line type of the arc-shaped section 201 of the flow guiding structure curve section through the second-order Bezier curve:
wherein: q (t) is the coordinates of any point on the curve,for the n-th Bernstein basis function, P i For the coordinate values of the curve control points, n+1 control points are required for n times of Bezier curves. In this embodiment, n=2, so the arc segment 201 requires three control points, i.e., the initial control point P 0 First control point P 1 A second control point P 2 。
Further, the width of the air duct 1 is set to be l 0 The protrusion height h of the arc-shaped segment 201 and the first control point P 1 With the initial control point P 0 Is a vertical distance l of (2) 1 Second control point P 2 And a third control point P 3 Straight line distance l of (2) 2 The method comprises the following steps of:
the height h of the protrusion of the arc-shaped section 201 is [0.35,0.5 ]]×l 0 ；
First control point P 1 With the initial control point P 0 Is a vertical distance l of (2) 1 Is [0.3,0.4]×b；
Second control point P 2 And a third control point P 3 Straight line distance l of (2) 2 Is [5mm, 0.7Xh ]]。
The protrusion height h of the arc-shaped segment 201 within the above range, the first control point P 1 With the initial control point P 0 Is a vertical distance l of (2) 1 Second control point P 2 And a third control point P 3 Straight line distance l of (2) 2 Is a group of optimal values, so that the flow guiding performance of the flow guiding structure is optimal.
In this embodiment, it is preferable that the protrusion height h of the arc-shaped section 201 is 0.5l 0 A first control point P 1 With the initial control point P 0 Is a vertical distance l of (2) 1 0.4 Xb, the second control point P 2 And a third control point P 3 Straight line distance l of (2) 2 0.7 Xh.
In the present embodiment, the width of the air duct 1 is l 0 Is 92mm, and the height b of the flow guiding structure is 134mm.
Further, the included angle delta between the straight line connecting the second control point P2 and the third control point P3 and the horizontal direction is within the range of 10 degrees to 14 degrees.
In this embodiment, the included angle δ between the straight line connecting the second control point P2 and the third control point P3 and the horizontal direction is 14 °, and the flow guiding structure under the angle has better effect of smoothing the airflow, so that the airflow is smoother, the vortex formation is inhibited, the airflow loss is reduced, the air intake is increased, and the aerodynamic noise at the air inlet is reduced. In addition, since in the present embodiment, the connection section 202 is preferably a straight line section, the straight line connecting the second control point P2 and the third control point P3 is the connection section 202, and δ is the angle between the connection section 202 and the horizontal direction.
Further, the length L of the flow guiding structure is the same as the width of the air inlet 101, so that the flow guiding structure can fully cover the effective air inlet area of the air inlet 101, and the air entering the air inlet 101 can pass through the flow guiding structure, thereby ensuring the functions of guiding the air flow of the air inlet in the air channel, inhibiting vortex and reducing noise.
In this embodiment, the length L of the flow guiding structure is 745mm.
Further, a cavity 203 is formed between the flow guiding structure and the inner wall of the air duct 1.
The cavity 203 can generate cavity resonance to noise, and can absorb a certain amount of noise at the air inlet 101, so that the noise at the air inlet is weakened, and the noise reduction effect of the diversion structure is enhanced.
Further, the baffle plate 2 is provided with baffle plate sound absorbing holes.
Because the guide plate 2 is of a plate-shaped structure, a plurality of guide plate sound-absorbing holes are formed in the guide plate 2, the specific number of the guide plate sound-absorbing holes can be selected according to the area of the guide plate 2, and a plurality of guide plate sound-absorbing holes are arranged at intervals. Through the shaping guide plate sound absorption hole on guide plate 2, can further absorb the noise in air intake and the wind channel, further promote the noise reduction effect.
As shown in fig. 7 to 8, the present embodiment further provides a range hood, and the inner wall of the air duct 1 of the range hood is provided with the flow guiding structure of the above embodiment.
The range hood of the embodiment has the flow guiding structure, so that the air in the air duct 1 of the range hood flows smoothly, no vortex is generated, the air flow loss is less, the air inlet quantity can be increased, the smoking efficiency is improved, and the noise at the air inlet 101 is low.
The range hood of this embodiment is a submerged type range hood, and this range hood includes box 3, is provided with spiral case 6 in box 3, is provided with motor 5 and impeller 4 in spiral case 6 top, and motor 5's output shaft impeller 4 to drive impeller 4 rotation produces suction. Still have wind channel 1 (air inlet duct) in box 3, wind channel 1 sets up along vertical direction, and wind channel 1 has air intake 101, and air intake 101 is seted up on box 3 and towards one side of user, is provided with smoke baffle 7 at the outer wall of box 3, and smoke baffle 7 is close to the top setting of air intake 101 and slope downwards, and in wind channel 1 and be close to the position of air intake 101 still be provided with oil guide plate 8, oil guide plate 8 slope downwards sets up.
Further, the flow guiding structure is arranged in the air flow corner region 9 in the air duct 1.
Because the motor 5 and the impeller 4 are arranged above the air inlet 101, under the action of the motor 5 and the impeller 4, external air can flow upwards after entering the air channel from the air inlet 101, an air flow folded angle area 9 is formed at the inner wall of the air channel close to the upper edge of the air inlet 101, no air flow flows through the air flow folded angle area 9, and when air flow flows in the air channel 1 to generate air pressure difference, the air flow can flow towards the air flow folded angle area 9, so that vortex is generated in the air flow folded angle area 9. Therefore, the flow guiding structure is arranged in the airflow corner region 9, so that airflow can be straightened, vortex formation is restrained, flow loss of airflow is reduced, air quantity of the range hood is increased, pneumatic noise at an air inlet is reduced, and performance of the range hood is improved.
In addition, after the air flow angle folding area 9 is provided with the flow guiding structure, the air inlet angle of the impeller blade can be changed, and the acting capability of the blade is improved, so that the overall performance of the range hood is further improved.
The oil guide plate 8 is used for guiding the grease flowing down by the range hood, the oil guide plate 8 is obliquely arranged downwards so that the grease flows downwards, the included angle (acute angle) between the oil guide plate 8 and the horizontal direction is 10-14 degrees, and in the embodiment, the included angle between the oil guide plate 8 and the horizontal direction is preferably 14 degrees.
In addition, in the embodiment, the included angle δ between the horizontal direction and the straight line connecting the second control point P2 and the third control point P3 is equal to the included angle between the oil guide plate 8 and the horizontal direction, so that the guiding effect of the guiding structure on the air flow is optimal, the vortex is effectively inhibited, the flow loss of the air flow is reduced, the air quantity of the range hood is increased, and the aerodynamic noise at the air inlet is reduced.
In this embodiment, the height b of the flow guiding structure is the same as the height of the panel 10 of the range hood, and is 134mm, so that the design can make full use of the structural space of the range hood, and the flow guiding structure with a more matched structural proportion is arranged, so as to further enhance the flow guiding effect of the flow guiding structure, inhibit vortex and reduce noise at the air inlet.
Through experimental verification, after the range hood of the embodiment is provided with the flow guiding structure of the embodiment, the full pressure efficiency is improved by 3.3%, the air quantity is improved by 9.7%, and as can be seen from comparison of fig. 3 and 8, the vortex is effectively restrained, the noise generated by the vortex is effectively reduced, the noise is reduced by about 0.4dB when the ventilation quantity is actually measured, and the efficiency is improved by about 2%. Specific test data are compared to the following table:
as can be seen from the data in the table, compared with the range hood without the diversion structure, the range hood of the embodiment has the advantages that the full pressure efficiency is improved by 3.3%, the air quantity is improved by 9.7%, and the performance of the whole machine is obviously improved.
Moreover, experiments on the flow guiding structure outside the parameter range defined by the invention show that the effective air inlet area of the air duct 1 can be reduced, thereby reducing the performance of the range hood.
In other embodiments, the protrusion height h of the arcuate segment 201 may also be 0.35×l, depending on the application 0 、0.5×l 0 Etc., a first control point P 1 With the initial control point P 0 Is a vertical distance l of (2) 1 Or 0.3×b, 0.35×b, etc., the second control point P 2 And third control ofPoint P 3 Straight line distance l of (2) 2 It may also be 5mm, 0.2 Xh, 0.5 Xh, etc.
In other embodiments, if the motor 5 and the impeller 4 are disposed below the air inlet 101, the external air will flow downward after entering the air duct from the air inlet 101 under the action of the motor 5 and the impeller 4, and the air flow corner region 9 is formed at the inner wall of the air duct adjacent to the lower edge of the air inlet 101, at this time, the flow guiding structure may be disposed at the lower edge of the air inlet, i.e. the initial control point P of the arc-shaped section 201 0 Is connected with the lower edge of the air inlet 101.
Although embodiments of the present invention have been described in connection with the accompanying drawings, various modifications and variations may be made by those skilled in the art without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope of the invention as defined by the appended claims.
Claims (17)
1. The utility model provides a water conservancy diversion structure, its characterized in that is platelike structure and sets up in the inner wall of wind channel (1), the cross-section that water conservancy diversion structure perpendicular to its length direction is the curve cross-section, water conservancy diversion structure is along its length direction includes at least one the curve cross-section, the curve cross-section includes:
the arc-shaped section (201) is arranged close to the air inlet (101) of the air duct (1).
2. A flow guiding structure according to claim 1, characterized in that the line shape of the arc-shaped section (201) is determined according to a second order bezier curve.
3. The flow guiding structure according to claim 2, characterized in that the curved section further comprises a connecting section (202), the connecting section (202) being connected to the arc-shaped section (201) and being arranged remote from the air inlet (101).
4. A flow guiding structure according to claim 3, characterized in that the initial control point P of the arc-shaped segment (201) 0 A second control point P connected to the edge of the inlet (101) and the arcuate segment (201) 2 -connecting the connection segments (202).
5. The structure according to claim 4, characterized in that it is located above the intake (101), the initial control point P 0 Is connected with the upper edge of the air inlet (101).
6. A flow guiding structure according to claim 4, characterized in that the highest point of the projection of the arc-shaped section (201) is the first control point P 1 The connecting section (202) has a third control point P 3 The third control point P 3 Is connected with the inner wall of the air duct (1).
7. The flow directing structure of claim 6, wherein:
the initial control point P 0 The coordinates of (1) are (0, 0);
the first control point P 1 Is (h, l) 1 )；
The second control point P 2 The coordinates of (1) 2 ·sinδ，b-l 2 ·cosδ)；
The third control point P 3 The coordinates of (a) are (0, b);
wherein h is the protrusion height of the arc-shaped section (201), l 1 For the first control point P 1 With the initial control point P 0 Is a vertical distance of l 2 For the second control point P 2 And the third control point P 3 Delta is the included angle between the horizontal direction and the straight line connecting the second control point P2 and the third control point P3, and b is the height of the flow guiding structure.
8. The flow directing structure of claim 6, wherein,
the width of the air duct (1) is l 0 ；
The height h of the protrusion of the arc-shaped section (201) is [0.35,0.5 ]]×l 0 ；
The first control point P 1 With the initial control point P 0 Is (are) perpendicular to the plane of the supportStraight distance l 1 Is [0.3,0.4]×b；
The second control point P 2 And the third control point P 3 Straight line distance l of (2) 2 Is [5mm, 0.7Xh ]]。
9. The structure according to claim 7, wherein the angle δ between the horizontal direction and the straight line connecting the second control point P2 and the third control point P3 is in the range of 10 ° -14 °.
10. A flow guiding structure according to claim 3, characterized in that the connecting section (202) is a straight section.
11. The air guiding structure according to claim 1, characterized in that the length L of the air guiding structure is the same as the width of the air inlet (101).
12. The flow guiding structure according to any of claims 1-11, characterized in that a cavity (203) is formed between the flow guiding structure and the inner wall of the air duct (1).
13. The flow guiding structure according to claim 12, characterized in that the flow guiding structure comprises a flow guiding plate (2), and a flow guiding plate sound absorbing hole is formed on the flow guiding plate (2).
14. A range hood, characterized in that the inner wall of the air duct (1) of the range hood is provided with a flow guiding structure as claimed in any one of claims 1-13.
15. The range hood according to claim 14, characterized in that the flow guiding structure is arranged in an air flow corner region (9) in the air duct (1).
16. The range hood according to claim 14, wherein an angle δ between a straight line connecting the second control point P2 and the third control point P3 in the flow guiding structure and the horizontal direction is equal to an angle between an oil guiding plate (8) of the range hood and the horizontal direction.
17. The range hood according to any of the claims 14-16, wherein the height b of the flow guiding structure is the same as the height of the panel (10) of the range hood.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311092169.XA CN116951509A (en) | 2023-08-28 | 2023-08-28 | Flow guiding structure and range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311092169.XA CN116951509A (en) | 2023-08-28 | 2023-08-28 | Flow guiding structure and range hood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116951509A true CN116951509A (en) | 2023-10-27 |
Family
ID=88458503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311092169.XA Pending CN116951509A (en) | 2023-08-28 | 2023-08-28 | Flow guiding structure and range hood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116951509A (en) |
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2023
- 2023-08-28 CN CN202311092169.XA patent/CN116951509A/en active Pending
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