CN112113255A

CN112113255A - Wing surface body device and range hood

Info

Publication number: CN112113255A
Application number: CN202011100026.5A
Authority: CN
Inventors: 任富佳; 高少华; 郑桐福; 余国成; 陈建卫; 桑磊
Original assignee: Hangzhou Robam Appliances Co Ltd
Current assignee: Hangzhou Robam Appliances Co Ltd
Priority date: 2020-10-14
Filing date: 2020-10-14
Publication date: 2020-12-22
Anticipated expiration: 2040-10-14
Also published as: CN112113255B

Abstract

The invention provides a wing surface body device and a range hood, and relates to the technical field of kitchen appliances. An airfoil body arrangement includes a first smoke guide element and a second smoke guide element; the first smoke guide device is suitable for being connected with the smoke collecting cover, the second smoke guide device is connected with the first smoke guide device, a smoke inlet flow channel is formed between the first smoke guide device and the second smoke guide device in an enclosing mode, and the first smoke guide device and/or the second smoke guide device are/is provided with a smoke inlet communicated with the smoke inlet flow channel; the lower surface of the second smoke guiding device is a curved surface which is used for guiding smoke to the smoke inlet. A range hood comprises the airfoil body device. The invention solves the technical problems that the smoke easily escapes and the smoke dredging effect is not good in the range hood adopting the conventional smoke baffle in the prior art.

Description

Wing surface body device and range hood

Technical Field

The invention relates to the technical field of kitchen appliances, in particular to a wing surface body device and a range hood.

Background

Some lampblack absorbers among the prior art appear the phenomenon of running the cigarette easily in the use, lead to the culinary art in-process oil smoke to fill whole kitchen, seriously influence user's physical and mental health and experience sense. In order to improve the smoking effect of the range hood, some range hoods are provided with a smoke baffle plate below or inside the smoke collecting hood, as shown in fig. 1 and 2. However, the smoke baffle is basically one or two plate-shaped structures, covers the air inlet of the smoke collecting hood, when the fan is started, the rising smoke can collide with the lower surface of the smoke baffle and flow to the side under the guiding action of the lower surface of the smoke baffle, so that the smoke can enter the smoke collecting hood from the side of the smoke baffle.

However, the above-mentioned smoke baffle structure adopts simple platelike structure, and only the lower surface has the guide effect to the flue gas to the lower surface adopts level and smooth form, so, the flue gas is flow velocity when keeping off the lower surface of cigarette board fast, thereby partial flue gas is in the avris edge escape that keeps off the cigarette board easily and can't enter into collection petticoat pipe when flowing, and then reduced the smoking efficiency of lampblack absorber, reduced user's experience and felt.

Based on this, the invention aims to provide the range hood with high smoking efficiency, which is particularly important.

Disclosure of Invention

The invention aims to provide a wing surface body device and a range hood, so as to solve the technical problems that in the prior art, the range hood adopting a conventional smoke baffle plate is easy to cause smoke escape and the like.

The invention provides a wing surface body device which is arranged at an air inlet of a smoke collecting cover, and comprises: a first smoke guide device and a second smoke guide device;

the first smoke guide device is suitable for being connected to the smoke collecting hood, the second smoke guide device is connected to the first smoke guide device, a smoke inlet flow channel is enclosed between the first smoke guide device and the second smoke guide device, and the first smoke guide device and/or the second smoke guide device are/is provided with a smoke inlet communicated with the smoke inlet flow channel;

the lower surface of the second smoke guiding device is a curved surface, and the curved surface is used for guiding smoke to the smoke inlet.

Furthermore, the curved surface comprises convex surface units and concave surface units, and the convex surface units and the concave surface units are alternately arranged to form a wave-shaped curved surface.

Furthermore, the cross sections of the convex surface units and the cross sections of the concave surface units are circular arcs;

the curvatures of the circular arcs of all the sections are equal, and/or the chord lengths of the circular arcs of all the sections are equal, and the length range of the chord lengths is 15 mm-30 mm.

Further, the convex surface unit and the connected concave surface unit are tangent at the joint of the convex surface unit and the connected concave surface unit.

Further, the distance between the lowest position of the convex unit and the highest position of the connected concave unit is constant, and the range of the distance is 5mm to 40 mm.

Further, the second smoke guiding device comprises a first flow guiding part and second flow guiding parts arranged on the left side and the right side of the first flow guiding part;

the joint of the first flow guide part and the second flow guide part on each side is respectively provided with a first smoke inlet;

the curved surface extends in a direction close to or far away from the first smoke inlet.

Further, the lowest position of the convex surface unit is higher than the lowest position of the first smoke inlet, and the higher distance is not less than 10 mm;

and/or the minimum height of the first smoke inlet ranges from 15mm to 60 mm.

Furthermore, an arc surface structure is arranged at one end part, far away from the first flow guide part, of the second flow guide part;

the lateral part of the first smoke guiding device is provided with a second smoke inlet, and the free end of the cambered surface structure extends towards the direction of the second smoke inlet.

Further, the included angle between the tangent plane at the free end of the cambered surface structure and the horizontal plane is 20-70 degrees;

and/or the included angle between the side surface of the smoke collecting hood opposite to the cambered surface structure and the horizontal plane ranges from 20 degrees to 70 degrees.

Furthermore, the left side, the right side and the front side of the first smoke guide device are respectively provided with a second smoke inlet;

the ratio of the area of the second smoke inlet located on the front side to the area of the second smoke inlet located on the left or right side ranges from 0.6 to 2.5.

Further, the second smoke inlet at least one of the left side, the right side and the front side of the first smoke guiding device is non-uniformly arranged.

Further, the airfoil body device further comprises a connecting device, and the first smoke guiding device and the second smoke guiding device are detachably connected through the connecting device.

Further, the connecting device comprises a first connecting piece and a second connecting piece;

the first connecting pieces are arranged on the left side and the right side of the second smoke guide device, and the left side and the right side of the first smoke guide device are respectively provided with first connecting parts which are detachably connected with the first connecting pieces;

the second connecting piece set up in first front side and the rear side of leading cigarette device, the front side and the rear side of second leading cigarette device are equipped with respectively and are suitable for with the second connecting piece can be dismantled and connect ground second connecting portion.

Further, the first connecting piece comprises a mounting part and a locking part which are connected with each other or integrally arranged, and the mounting part is rotatably arranged on the second smoke guide device;

the locking part can rotate along with the mounting part to be clamped with or separated from the edge of the first smoke guide device.

Further, the second connecting piece comprises a mounting seat and a collision bead which is arranged on the mounting seat and can extend or retract relative to the mounting seat;

the collision bead can be clamped with or separated from a limiting structure arranged on the second smoke guide device.

Further, first smoke guiding device top is equipped with solid fixed ring, gu fixed ring's top with the bottom of collection petticoat pipe is connected, gu fixed ring's bottom with first smoke guiding device's top is connected.

Has the advantages that:

the invention provides a wing surface body device which comprises a first smoke guide device and a second smoke guide device, wherein the first smoke guide device is connected to an air inlet of a smoke collecting cover, the first smoke guide device and the second smoke guide device are connected with each other, a smoke inlet channel is enclosed between the first smoke guide device and the second smoke guide device, at least one of the first smoke guide device and the second smoke guide device is provided with a smoke inlet, and further, the lower surface of the second smoke guide device is a curved surface; specifically, when the range hood is started, a negative pressure area is generated around a smoke inlet, smoke generated by cooking rises and flows to the negative pressure area, the smoke forms a tiny self-rotating body in the rising process, the speeds of fluids on two sides of the self-rotating body generate a difference value, namely, the flow speed on one side is high, the flow speed on the other side is low, so that smoke particles can generate a Magnus effect when flowing on the surface of a curved surface to form a local vortex, so that the smoke particles can pass through the curved surface for two or more times, and the flowing speed of the smoke along the curved surface is reduced; then, the smoke decelerated by the curved surface is sucked into the smoke inlet, flows into the smoke collecting cavity of the smoke collecting cover after being dredged by the smoke inlet flow passage, and is finally discharged to the outside through the smoke outlet.

Based on the curved surface design of the lower surface of the second smoke guide device, the smoke generates the Magnus effect at the curved surface, the flowing speed of the smoke at the lower surface of the second smoke guide device is reduced, the smoke has more sufficient time to flow to the smoke inlet and be sucked into the smoke inlet, and the probability of the smoke escaping from the smoke inlet is reduced to a certain extent; in addition, as the smoke inlet flow channel is formed between the first smoke guide device and the second smoke guide device, the smoke inlet flow channel can perform the functions of guiding and dredging the smoke entering from the smoke inlet, the flow efficiency of the smoke in the wing surface body device is improved to a certain extent, and the problems of low flow efficiency and easy escape caused by random flow of the smoke before entering the smoke collecting hood are solved; moreover, due to the curved surface design, a certain elevation angle is formed between the local part of the curved surface and the horizontal plane, and the smoke lifting effect can be achieved, so that the smoke can flow to the smoke inlet along the curved surface; the curved surface design can also increase the area of contact of flue gas and second smoke guide device lower surface, has increased flue gas condensation area intangibly, promotes flue gas filter effect through increasing condensation.

In addition, the edge of the second flow guide part is designed into the cambered surface structure, so that the flue gas can generate a coanda effect on the surface of the cambered surface structure after being decelerated by the curved surface of the lower surface of the second flow guide part, the flow velocity component of the flue gas in the horizontal direction is reduced to a certain extent, the probability of the flue gas escaping from the edge of the second flow guide part is reduced, and the smoking effect is further improved.

In addition, through the design to the second advances the cigarette mouth area everywhere on the first smoke guide device, can adapt to the condition of different flue gas concentrations around the first smoke guide device to, can distribute the flue gas flow, in order to promote smoking effect.

In addition, through the design of first connecting piece and second connecting piece for can alternate segregation between first smoke guide device and the second smoke guide device, promote dismouting efficiency between the two, be convenient for the maintenance and the maintenance of airfoil body device and lampblack absorber.

The invention further provides a range hood, which comprises the airfoil body device, so that the range hood can achieve the technical advantages and effects achieved by the airfoil body device, and the description is omitted.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a prior art range hood having a first form of smoke deflector;

FIG. 2 is a prior art range hood having a second form of smoke deflector;

fig. 3 is a schematic structural diagram of a range hood provided by an embodiment of the present invention;

fig. 4 is a side sectional view of a range hood provided by an embodiment of the present invention;

fig. 5 is a disassembled schematic view of the first smoke guiding device, the second smoke guiding device and the connecting device provided in the embodiment of the present invention;

fig. 6 is an assembly schematic diagram of a first smoke guide device, a second smoke guide device and a connecting device provided by the embodiment of the invention;

fig. 7 is a first perspective view of a second smoke guide device provided in accordance with an embodiment of the present invention;

fig. 8 is a second perspective view of a second smoke guide device provided in accordance with an embodiment of the present invention;

FIG. 9 is a cross-sectional view of a second smoke guide device provided in accordance with an embodiment of the present invention;

FIG. 10 is an enlarged view of a portion of FIG. 9 at B;

FIG. 11 is an enlarged view of a portion of FIG. 9 at C;

FIG. 12 is a schematic view of a second smoke deflector and range provided by an embodiment of the present invention;

FIG. 13 is an enlarged view of a portion of FIG. 12 at D;

fig. 14 is a first perspective view of a first smoke guide device provided in accordance with an embodiment of the present invention;

fig. 15 is a second perspective view of the first smoke guide device provided in the embodiment of the present invention;

fig. 16 is a partially enlarged view taken at a in fig. 6 (the first link is in an unlocked state);

fig. 17 is a partially enlarged view taken at a in fig. 6 (the first link member is in a locked state);

fig. 18 is a schematic structural diagram of a first connecting element according to an embodiment of the present invention;

fig. 19 is a schematic structural diagram of a second connecting member according to an embodiment of the present invention.

Icon:

100-a housing;

200-a fan;

300-smoke collecting hood;

400-airfoil body arrangement;

410-a first smoke guide device; 411-a cover; 4111-a second smoke inlet; 4112-a clamping portion; 412-a second edge;

420-a second smoke guide device; 421-a first flow guide part; 422-a second flow guide part; 4221-convex unit; 4222-concave surface unit; 423-first smoke inlet; 424-cambered surface structure; 425-a first edge; 4251-a limit structure;

431-a first connector; 4311-mounting part; 4312-locking part;

432-a second connector; 4321-mounting seat; 4322-Bumper bead;

440-a fixed ring;

q-smoke inlet channel.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The present embodiment provides a range hood, as shown in fig. 3 and 4, the range hood includes a casing 100, a fan 200 and a smoke collecting hood 300, wherein the fan 200 is installed in the casing 100, and the smoke collecting hood 300 is installed at the lower end of the casing 100, because the casing 100, the fan 200 and the smoke collecting hood 300 are all provided with an air duct therein, under the driving action of the fan 200, smoke can be collected by the smoke collecting hood 300 and flow into the fan 200 through the air duct, and is finally discharged to the outside.

Further, consider that collection petticoat pipe 300 collects the flue gas in-process, part flue gas can be followed collection petticoat pipe 300's avris escape and influence the smoke exhausting effect of lampblack absorber, in this embodiment, airfoil body device 400 has been set up in collection petticoat pipe 300's bottom, can dredge and collect the flue gas at first through airfoil body device 400, then dredge the flue gas to collection petticoat pipe 300 in, thereby effectively alleviated the problem that the flue gas escaped, the smoking effect of lampblack absorber has been promoted greatly, further promoted lampblack absorber quality and user's experience sense.

The airfoil body arrangement 400 will now be described in detail with reference to FIGS. 3-19, as follows:

the airfoil body device 400 provided by the embodiment includes a first smoke guiding device 410 and a second smoke guiding device 420, wherein the first smoke guiding device 410 is connected to an air inlet of the smoke collecting cover 300, the first smoke guiding device 410 and the second smoke guiding device 420 are connected with each other, a smoke inlet flow channel Q is defined between the first smoke guiding device 410 and the second smoke guiding device 420, at least one of the first smoke guiding device 410 and the second smoke guiding device 420 is provided with a smoke inlet, and further, the lower surface of the second smoke guiding device is a curved surface; specifically, when the fan 200 is started, a negative pressure area is generated around the smoke inlet, smoke generated by cooking rises and flows to the negative pressure area, the smoke forms a tiny self-rotating body in the rising process, the speeds of fluids on two sides of the self-rotating body generate a difference value, namely, the flow speed on one side is high, the flow speed on the other side is low, so that a magnus effect (a magnus effect is generated when smoke particles flow on the surface of a curved surface, namely, when the rotation angular velocity vector of a rotating object does not coincide with the flight velocity vector of the object, a transverse force is generated in the direction perpendicular to the plane formed by the rotation angular velocity vector and the plane formed by the plane of the, so that the smoke particles pass through the curved surface for two or more times, and the flow speed of the smoke along the curved surface is reduced; then, the smoke decelerated by the curved surface is sucked into the smoke inlet, guided by the smoke inlet flow passage Q, flows into the smoke collecting cavity of the smoke collecting cover 300, and finally is discharged to the outside through the smoke outlet.

Based on the curved surface design of the lower surface of the second smoke guiding device 420, the smoke can generate the Magnus effect at the curved surface, and the flow speed of the smoke at the lower surface of the second smoke guiding device 420 is reduced, so that the smoke has more sufficient time to flow to the smoke inlet and be sucked into the smoke inlet, and the probability of smoke escape is reduced to a certain extent; moreover, as the smoke inlet flow channel Q is formed between the first smoke guiding device 410 and the second smoke guiding device 420, the flow guiding and dredging function is performed on the smoke entering through the smoke inlet, so that the flow efficiency of the smoke in the airfoil body device 400 is improved to a certain extent, and the problems of low flow efficiency, easy escape and the like caused by the random flow of the smoke before entering the smoke collecting hood 300 are solved; moreover, due to the curved surface design, a certain elevation angle can be formed between the local part of the curved surface and the horizontal plane, and a high lift effect can be achieved on the smoke (the high lift specifically means that a lift coefficient is increased by adjusting an attack angle on an oil smoke running path, so that the oil smoke and the solid surface form a larger friction coefficient), and the smoke can flow to the smoke inlet along the curved surface; the curved surface design can also increase the area of contact of flue gas and second smoke guide device 420 lower surface, has increased flue gas condensation area intangibly, promotes flue gas filter effect through increasing condensation.

Preferably, as shown in fig. 9 and 10, the curved surface includes convex surface units 4221 and concave surface units 4222, and the convex surface units 4221 and the concave surface units 4222 are alternately arranged to form a wave-shaped curved surface. Considering that most of range hoods on the market at present are matched with cookers, generally, smoke mainly flows along the left and right directions. Based on this, in the present embodiment, it is preferable that the curved surface extends in the left-right direction.

Here, it should be noted that, first, the alternating arrangement of the convex units 4221 and the concave units 4222 includes a mode in which the convex units 4221, the concave units 4222, and the like connected in sequence in the left-right direction form a curved surface; secondly, the convex unit 4221, the concave unit 4222, the convex unit 4221, the concave unit 4222 and the like which are connected in sequence along the left-right direction form a curved surface; that is, one of the modes may be regarded as the cycle period of the convex surface unit 4221 or the concave surface unit 4222 being 1, and the other mode may be regarded as the cycle period of the convex surface unit 4221 or the concave surface unit 4222 being 2, but the modes are not limited to the above two modes, and the cycle period may be 3, 4, 5, and the like, as long as the specific conditions are satisfied.

Second, the convex unit 4221 can be understood as a downward convex local curved surface, and the concave unit 4222 can be understood as an upward concave local curved surface.

Further, the convex unit 4221 and the concave unit 4222 both adopt circular arc surfaces, the curvatures of the circular arc surfaces may be equal or unequal, and of course, in consideration of the design of the curved surface and the specific situation that the flue gas flows along the curved surface, in this embodiment, it is preferable that the curvatures of the circular arc surfaces are equal, so that the cross section of the curved surface formed by the convex unit 4221 and the concave unit 4222 is regular wave-shaped, and thus, when the flue gas flows along the extending direction of the curved surface, the magnus effect is generated at the circular arc surface, and the magnus effect is increased, so that the flow speed of the flue gas is reduced, and the problem of escape caused by high flow speed of the flue gas is effectively alleviated.

Further, please refer to fig. 10, the chord lengths d corresponding to the arc surfaces of the segments are all equal, specifically, the chord length range corresponding to the arc surfaces of the segments is 15mm to 300mm, which includes 15mm, 70mm, 120mm, 180mm, 240mm, 300mm, and the like, and may also be other values within the range; considering the left and right dimensions of the fume collecting hood 300 and the details of the curved surface, the chord length is preferably 58mm in the present embodiment.

In this embodiment, the sum of the numbers of the convex unit 4221 and the concave unit 4222 is not less than 4, preferably 8, that is, the curved surface preferably includes eight arc surfaces.

Further, when convex unit 4221 and concave unit 4222 lug connection, tangent at the junction between the two, so, when the flue gas flows through the junction, can be more level and smooth, thereby can not disturb the flow of flue gas, guaranteed the smooth and easy flow of flue gas.

Preferably, as shown in fig. 10, when the convex surface unit 4221 is directly connected with the concave surface unit 4222, the sum of the distances between the lowest point of the convex surface unit 4221 and the highest point of the connected concave surface unit 4222 is a constant value H1, the constant value H1 is in the range of 5mm to 40mm, including 5mm, 12mm, 18mm, 24mm, 30mm, 36mm, 40mm, etc., and of course, other values within the range; considering that the specific parameters of the curved surface have influence on the smoke, the constant value H1 is preferably 16mm after verification. The curved surface of this kind of specification can enough satisfy reality, manufacturing requirement, can satisfy the operation requirement of lampblack absorber again.

Preferably, the second smoke guiding device 420 includes a first guiding portion 421 and a second guiding portion 422, the second guiding portion 422 is disposed on the left side and the right side of the first guiding portion 421, a first smoke inlet 423 is disposed in a connection area between the second guiding portion 422 and the first guiding portion 421, and a curved surface of a lower surface of the second guiding portion 422 extends along the left-right direction.

Specifically, as shown in fig. 7 to 9, the left second flow guiding portion 422, the first flow guiding portion 421 and the right second flow guiding portion 422 are integrally arranged to form a structure similar to a plate, the plate-shaped second smoke guiding device 420 is arranged above the cooker, and the left and right second flow guiding portions 422 correspond to the cooker below, so that during cooking, smoke rises, under the adsorption action of the first smoke inlet 423, part of smoke gradually draws close to the middle of the second smoke guiding device 420, and meanwhile, when the rising smoke reaches the lower surface of the second smoke guiding device 420, part of smoke flows to the first smoke inlet 423 along the curved surface formed by the convex unit 4221 and the concave unit 4222, along with the flow of smoke, the magnus effect occurs on the surface of the curved surface, thereby slowing down the speed of flowing to the first smoke inlet 423 and reaching the first smoke inlet 423, furthermore, the flue gas can be ensured to smoothly flow into the first smoke inlet 423 and hardly escape from the first smoke inlet 423, and the absorption efficiency of the flue gas is greatly improved.

Further, in order to better absorb the smoke, the embodiment specially designs the position and the size of the first smoke inlet 423, specifically, as shown in fig. 12 and 13, the lowest position of the first smoke inlet 423 is lower than the lowest position of the convex unit 4221, and a distance difference H2 between the two lowest positions in the vertical direction is not less than 10mm, preferably, the distance difference H2 is 15mm, that is, a certain space exists between the lowest position of the curved surface and the lowest position of the first smoke inlet 423, so that the smoke can flow in the space along the extending direction of the curved surface, thereby ensuring that the smoke finally directly flows into the first smoke inlet 423 without escaping.

It should be noted here that when the distance difference H2 is too large, that is, the first smoke inlet 423 is too low, smoke is not easy to enter the first smoke inlet 423 due to the flow of the smoke in the space near the curved surface, and the smoke is easy to escape; when the distance difference H2 is too small, that is, the first smoke inlet 423 is too close to the top, part of the smoke will escape from the lower side of the first smoke inlet 423 when the smoke flows along a curved surface. In summary, the distance difference H2 between the lowest part of the curved surface and the lowest part of the first smoke inlet 423 should be appropriate to prevent the smoke from escaping.

Further, the minimum height H3 of the first smoke inlet 423 is in a range of 15mm to 60mm, including 15mm, 22mm, 25mm, 35mm, 45mm, 55mm, 60mm, etc., and certainly includes other values in the range, and preferably, in the embodiment, H3 is 22 mm. It should be noted here that, because the first smoke inlet 423 adopts a flaring structure, that is, the outer end area is large, and the inner end area is small, so that the smoke can enter the first smoke inlet 423 conveniently; the minimum height here is the height at the small end of the flare structure, and the height here is not the absolute height in the vertical direction, but rather with respect to the rectangle at the small end; first inlet 423 adopts above-mentioned design, can guarantee the abundant absorption to the flue gas, alleviates the flue gas escape to promote smoking efficiency.

Preferably, an end of the second guiding portion 422 far from the first guiding portion 421 is provided with an arc-shaped structure 424, a free end of the arc-shaped structure 424 (i.e., an end not connected with the second guiding portion 422) extends towards the second smoke inlet 4111 on the side of the first smoke guiding device 410, specifically, as shown in fig. 3, 6, 9 and 11, a space is provided between an outer surface of the arc-shaped structure 424 and an opposite inner surface of the smoke collecting hood 300 to form a smoke inlet passage, and the smoke inlet passage is communicated with the smoke inlet passage Q through the second smoke inlet 4111, so that when part of smoke flows along the curved surface of the lower surface of the second smoke guiding device 420 to the arc-shaped structure 424 to the left and right sides, due to the deceleration effect of the curved surface, when the smoke flows along the outer surface of the arc-shaped structure 424, a wall-attaching effect is generated, thereby changing the original flowing direction, and instead flowing along the outer surface of the arc-shaped structure 424, that is, when the smoke flows on the outer surface of the arc-shaped structure 424, the smoke generates the coanda effect (the coanda effect is also called wall attachment effect or coanda effect). when the fluid (water flow or air flow) deviates from the original flow direction, the fluid has a tendency to flow along the surface of the convex object, when the fluid has surface friction with the surface of the object through which the fluid flows (the fluid viscosity can be said), the fluid flows along the surface of the object as long as the curvature is not large, and then the smoke can directly flow into the smoke inlet channel through the drainage effect of the arc-shaped structure 424 and enter the smoke inlet channel Q through the second smoke inlet 4111.

Therefore, based on the design of cambered surface structure 424 for the flue gas can be changeed under cambered surface structure 424's drainage effect and get into second inlet 4111, thereby has effectively alleviated the problem that the flue gas escaped from second inlet 4111, has promoted smoking efficiency.

Further, the included angle α between the tangent plane at the free end of the arc-shaped structure 424 and the horizontal plane is 20 ° to 70 °, specifically including 20 °, 25 °, 35 °, 45 °, 60 °, 70 °, and the like, and certainly also including other angle values within the above included angle range; preferably, the angle α here ranges from 40 ° to 50 °. It should be noted here that the flue gas generates the coanda effect at the arc-shaped structure 424, so that the flow angle of the flue gas is changed, and the exit angle (the included angle between the tangent plane at the free end and the horizontal plane) of the arc-shaped structure 424 is specially designed, so that the exit end (the free end) of the arc-shaped structure 424 is closer to the second flue gas inlet 4111, so that the flue gas can more easily enter the second flue gas inlet 4111; and, based on this exit angle, when the exit velocity of flue gas is unanimous with the regional velocity of flow of the negative pressure of lateral part, the cigarette rate of advancing of collection petticoat pipe 300 lateral part is the highest, and the branch speed of flue gas to lateral part horizontal direction can reduce to reduce the probability that the flue gas escaped to the lateral part, promoted flue gas absorption efficiency to a certain extent.

Further preferably, the arc-shaped structures 424 are arc-shaped surfaces.

Moreover, the included angle range between the inner side surface of the smoke collecting hood 300 and the horizontal plane is 20 degrees to 70 degrees, specifically includes 20 degrees, 25 degrees, 35 degrees, 45 degrees, 60 degrees, 70 degrees and the like, and certainly also includes other angle values in the included angle range; preferably, the included angle between the inner side surface of the smoke collecting cover 300 and the horizontal plane is equal to the included angle between the tangent plane at the free end of the arc-shaped structure 424 and the horizontal plane, so that the smoke can be subjected to the dredging function of the smoke inlet channel formed between the inner side surface of the smoke collecting cover 300 and the outer surface of the arc-shaped structure 424, and the smoke can enter the second smoke inlet 4111 more easily.

Preferably, the left side, the right side and the front side of the first smoke guide device 410 are respectively provided with a second smoke inlet 4111, and the ratio of the area S1 of the second smoke inlet 4111 positioned at the front side to the area S2 of the second smoke inlet 4111 positioned at the left side or the right side ranges from 0.6 to 2.5, specifically including 0.6, 1.0, 1.5, 2.0, 2.5, etc., and preferably 0.82 in the present embodiment. Specifically, as shown in fig. 14 and 15, the opening areas of the second smoke inlet 4111 at each position of the first smoke guide device 410 are different, and a specific air distribution ratio F (air distribution ratio: ratio of air volume in unit time of different air inlet regions) is formed based on the ratio of the opening areas at each position, where F is S1/S2, that is, because the opening areas at each position are different, the smoke guide device can adapt to different mass density distributions of the smoke at each position, and therefore, the smoke distributes the smoke flow rate when the fan 200 provides the same flow rate, and improves the smoking effect.

Considering that the smoke collecting hood 300 is left-right symmetrical, in the present embodiment, it is preferable that the opening area of the left second smoke inlet 4111 and the opening area of the right second smoke inlet 4111 are designed to be equal to each other as S2, and the opening area S1 of the front second smoke inlet 4111 is different from each other, and S1/S2 is set to be between 0.6 and 2.5, so as to distribute the smoke flow rates of different external mass concentrations, thereby improving the smoking effect.

It should be noted here that when the flue gas generated by cooking reaches the vicinity of the first smoke guiding device 410, a specific mass concentration distribution state is formed in the area around the first smoke guiding device 410, a rough mass concentration distribution rule can be obtained through CAE analysis, and the second smoke inlet 4111 at each position of the first smoke guiding device 410 is specially designed according to the analysis result, for example, an area and a position are provided, so that the flue gas flow can be distributed through the special design of the second smoke inlet 4111, the adsorption efficiency of the flue gas is improved to a certain extent, and meanwhile, the problem of flue gas escape is effectively alleviated.

Further, according to the CAE analysis result, the smoke mass concentration of the left region of the first smoke guiding device 410 may also be differentiated according to the location, for example, because the smoke mass concentrations of the rear portion and the front portion of the left region are relatively low, a closed region is disposed at the rear upper portion of the left region, that is, the second smoke inlet 4111 is not opened, the opening area of the front portion of the left region is relatively small, and the middle opening area of the left region is relatively large, so that the second smoke inlet 4111 similar to a trapezoid is formed in the left region, and thus according to the different smoke mass concentrations of the left region at different locations, the second smoke inlet 4111 of the left region is designed in a non-uniform manner, so as to correspond to the smoke mass concentrations at different locations, and improve the smoke absorption efficiency. Similarly, the second smoke inlet 4111 of the right region of the first smoke guiding device 410 is formed in a manner substantially similar to that of the second smoke inlet 4111 of the left region, and will not be described in detail here. In this embodiment, it is preferable that the first smoke guiding device 410 is disposed in a left-right symmetrical manner, that is, the second smoke inlet 4111 in the left area is left-right symmetrical to the second smoke inlet 4111 in the right area.

Similarly, the flue gas mass concentration of the front side area of the first smoke guiding device 410 can be distinguished according to the position, for example, because the flue gas mass concentration of the left part and the right part of the front side area is relatively high, and the middle is relatively low, thereby, the second smoke inlet 4111 is respectively arranged on the left part and the right part of the front side area, the middle forms a closed area, thereby, the left part and the right part of the front side area are respectively formed into the second smoke inlet 4111 similar to the trapezoid, so, according to the different conditions of the flue gas mass concentrations of the different positions of the front side area, the second smoke inlet 4111 of the front side area is designed into a non-uniform form, so as to correspond to the flue gas mass concentrations of the different positions of each position, and improve the adsorption efficiency of the flue gas.

Preferably, the airfoil body arrangement 400 further comprises a connecting device, and the first smoke guide device 410 and the second smoke guide device 420 are detachably connected through the connecting device, so as to facilitate maintenance and repair of the airfoil body arrangement 400.

Further, the connecting device comprises a first connecting piece 431 and a second connecting piece 432, wherein the first connecting piece 431 is respectively arranged on the left side and the right side of the second smoke guiding device 420, and correspondingly, the first connecting parts are respectively arranged on the left side and the right side of the first smoke guiding device 410, so that the first smoke guiding device 410 and the second smoke guiding device 420 can be detachably connected in the left-right direction through the detachable matching installation between the first connecting piece 431 and the first connecting parts; and, set up second connecting part 432 respectively at the front side and the rear side of first fume guiding device 410, correspondingly, set up second connecting portion respectively at the front side and the rear side of second fume guiding device 420 to, can wash the cooperation through the removable washing between second connecting part 432 and the second connecting portion and realize first fume guiding device 410 and second fume guiding device 420 and wash the connection in the front and back direction removably. Based on the detachable and washable matching of the first connecting part 431 and the first connecting part and the detachable and washable matching of the second connecting part 432 and the second connecting part, the first smoke guiding device 410 and the second smoke guiding device 420 are conveniently detached and installed, and the maintenance efficiency and the repair efficiency of the airfoil body device 400 are further improved.

Furthermore, the first connecting piece 431 includes a mounting portion 4311 or a locking portion 4312, specifically, as shown in fig. 5, 6, and 14 to 18, the mounting portion 4311 is a cylinder, a groove is axially formed on the surface of the cylinder, in order to rotatably mount the first connecting piece 431 on the second smoke guide device 420, in this embodiment, a hole is formed at the edge of the second smoke guide device 420, the cylinder is inserted into the hole, and the groove abuts against the hole wall, so that the first connecting piece 431 is ensured to be rotatable relative to the second smoke guide device 420, and the first connecting piece 431 can be limited by abutting against the hole wall through the groove to prevent the first connecting piece 431 from separating from the second smoke guide device 420; the locking portion 4312 is integrally disposed with or connected to the mounting portion 4311, the locking portion 4312 protrudes outward along the radial direction of the mounting portion 4311, and the engaging portion 4112 (i.e., the first connecting portion) is disposed at the edge of the first smoke guiding device 410, so that when the first smoke guiding device 410 and the second smoke guiding device 420 are assembled with each other, only the locking portion 4312 needs to be rotated to the engaging portion 4112, so as to lock the first smoke guiding device 410 and the second smoke guiding device 420 together; when the lock portion 4312 needs to be removed, the lock can be released by rotating the lock portion 4312 to disengage from the engaging portion 4112. Based on the first connecting member 431, the first smoke guide device 410 and the second smoke guide device 420 can be locked or unlocked in the left-right direction, so that the maintenance or repair of the airfoil body device 400 is facilitated, and the dismounting efficiency is improved.

In addition, the second connecting member 432 in this embodiment includes a mounting seat 4321 and a collision bead 4322, specifically, as shown in fig. 5, 6 and 19, the mounting seat 4321 is a cube, the mounting seat 4321 is fixed on the first smoke guide device 410 by a fastening member (e.g., a screw, etc.), the mounting seat 4321 is provided with a cavity in which a spring is disposed, the collision bead 4322 is disposed in the cavity and is pressed by the spring to the outside of the cavity, and correspondingly, the second smoke guide device 420 is provided with a limit structure 4251 (i.e., a second connecting portion), preferably a limit hole or a limit groove, so that when the first smoke guide device 410 and the second smoke guide device 420 are assembled, the collision bead 4322 is first pressed to be contracted into the cavity of the mounting seat 4321, and when the collision bead 4322 moves to the limit structure 4251, the collision bead 4322 extends outward under the action of the spring and enters the limit structure 4251, so that the first smoke guide device 410 and the second smoke guide device 420 are installed in the front and rear directions by the collision bead 4322 and the limit structure 4251 being matched Assembling; when the first smoke guiding device 410 and the second smoke guiding device 420 are detached, the first smoke guiding device 410 and the second smoke guiding device 420 are detached only by force, and at the moment, the collision beads 4322 are squeezed by the limiting structures 4251 and are shrunk into the cavity of the mounting seat 4321, so that the first smoke guiding device 410 and the second smoke guiding device 420 are released from limiting, and the first smoke guiding device 410 and the second smoke guiding device 420 are detached conveniently. Based on the second connecting piece 432, the first smoke guiding device 410 and the second smoke guiding device 420 can be locked or unlocked in the front-back direction, so that the maintenance or repair of the airfoil body device 400 is facilitated, and the dismounting efficiency is improved.

Therefore, in this embodiment, the first connection part 431 composed of the installation part 4311 and the locking part 4312 is matched with the first connection part, and the second connection part 432 composed of the installation seat 4321 and the collision bead 4322 is matched with the second connection part, so that the detachable connection between the first smoke guiding device 410 and the second smoke guiding device 420 is realized, and convenience is provided for the maintenance and repair of the subsequent winged surface body device 400.

Preferably, the first smoke guiding device 410 in this embodiment is a cover 411, the cover 411 is in a funnel shape, each side of the cover 411 may be provided with a second smoke inlet 4111, and preferably, each of the front side plate, the left side plate and the right side plate of the cover 411 is provided with a second smoke inlet 4111, so as to achieve smoke flow distribution and improve smoke absorption efficiency. Further, the included angle range between each side plate and the upper end face of the second smoke guiding device 420 is 0-20 degrees, preferably 7 degrees, and by means of the design, the smoke inlet flow channel Q can be guaranteed to have a large enough volume, so that smooth flow of smoke is guaranteed. In consideration of the oil contamination problem, in this embodiment, a protective net or a filter screen may be further disposed at the second smoke inlet 4111 to filter the smoke, and prevent external impurities from entering the smoke inlet flow passage Q; of course, the second smoke inlet 4111 may also be directly designed into a plurality of smoke inlets to function as a protective net or a filter screen. In addition, since the second smoke inlet 4111 is located between the first smoke guiding device 410 and the smoke collecting hood 300, oil stains at the second smoke inlet 4111 are not easily seen by a user, so that the appearance can be further improved.

In addition, referring to fig. 5 and fig. 6, in order to realize the assembly between the first smoke guiding device 410 and the second smoke guiding device 420, in this embodiment, the bottom end of the cover 411 is provided with the second edge 412, the upper end surface of the second smoke guiding device 420 is provided with the first edge 425, and the area enclosed by the first edge 425 is slightly larger than the area enclosed by the second edge 412, so that the top end of the second smoke guiding device 420 can be fastened to the bottom end of the first smoke guiding device 410. Furthermore, the engaging portion 4112 is disposed on the left side and the right side of the housing 411 near the second edge 412, the first connecting member 431 is disposed on the left side and the right side of the second smoke guiding device 420 near the first edge 425, similarly, the limiting structure 4251 is disposed on the front side and the rear side of the second smoke guiding device 420 near the side wall of the first edge 425, and the mounting seat 4321 of the second connecting member 432 is fixed on the side wall of the second edge 412, so that when the first edge 425 is sleeved on the second edge 412, the second connecting member 432 is located between the first edge 425 and the second edge 412, and at this time, the collision bead 4322 can be clamped into the limiting structure 4251 to limit.

Of course, in other embodiments, the second connecting part 432 and the second connecting part may be replaced by screws, elastic pieces, magnets, etc., as long as they are easy to detach.

Preferably, in the present embodiment, a fixing ring 440 is provided at the top of the first smoke guiding device 410 to realize a fixed connection with the smoke collecting hood 300 through the fixing ring 440, specifically, as shown in fig. 3, 5 and 6, the top of the fixing ring 440 is fixed at the bottom of the smoke collecting hood 300 by screws, and the bottom of the fixing ring 440 is fixed at the outlet at the top of the first smoke guiding device 410 by screws; by the arrangement of the fixing ring 440, the stability of the installation between the first smoke guiding device 410 and the smoke collecting cover 300 is ensured.

In summary, the airfoil body device 400 provided in this embodiment reduces the flow velocity of the smoke through the curved surface design of the lower surface of the second smoke guide device 420, so as to reduce the escape rate of the smoke and improve the smoking effect; through the design of the arc-shaped structures 424 on the side parts of the second smoke guide device 420, the escape of smoke from the side parts is reduced; the opening area of the second smoke inlet 4111 at each position on the first smoke guide device 410 is designed to adapt to the condition of smoke with different mass concentrations in each external area, so that the smoking effect is improved, and the problem of smoke escape is solved; through the design of first connecting piece 431 and second connecting piece 432, realized that first leading between cigarette device 410 and the second leading between cigarette device 420 convenient dismouting, improved and maintained, maintenance efficiency.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An airfoil body arrangement disposed at an air inlet of a fume collecting hood (300), the airfoil body arrangement (400) comprising: a first smoke guide device (410) and a second smoke guide device (420);

the first smoke guide device (410) is suitable for being connected to the smoke collecting hood (300), the second smoke guide device (420) is connected to the first smoke guide device (410), a smoke inlet flow channel (Q) is enclosed between the first smoke guide device (410) and the second smoke guide device (420), and the first smoke guide device (410) and/or the second smoke guide device (420) are/is provided with a smoke inlet communicated with the smoke inlet flow channel (Q);

the lower surface of the second smoke guiding device (420) is a curved surface which is used for guiding smoke to the smoke inlet.

2. The airfoil body arrangement according to claim 1, characterized in that the camber comprises convex surface units (4221) and concave surface units (4222), the convex surface units (4221) alternating with the concave surface units (4222) forming an undulating camber.

3. The airfoil body arrangement according to claim 2, characterized in that the cross-section of the convex surface unit (4221) and the cross-section of the concave surface unit (4222) are both circular arcs;

the curvatures of the circular arcs of all the sections are equal, and/or the chord lengths of the circular arcs of all the sections are equal, and the length range of the chord lengths is 15 mm-300 mm.

4. The airfoil body arrangement according to claim 2, characterized in that the convex surface unit (4221) is tangent to the connected concave surface unit (4222) at the junction of the two.

5. The airfoil body arrangement according to claim 2, characterized in that the distance between the lowest of the convex surface units (4221) and the highest of the connected concave surface units (4222) is constant and in the range of 5mm to 40 mm.

6. The airfoil body arrangement according to any of claims 2-5, wherein the second smoke guide device (420) comprises a first flow guide part (421) and second flow guide parts (422) arranged on the left and right sides of the first flow guide part (421);

a first smoke inlet (423) is respectively arranged at the joint of the first flow guide part (421) and the second flow guide part (422) on each side;

the curved surface extends in a direction close to or away from the first smoke inlet (423).

7. The airfoil body arrangement according to claim 6, characterized in that the lowest of the convexity elements (4221) is higher than the lowest of the first smoke inlet (423) by a distance not less than 10 mm;

and/or the first smoke inlet (423) has a minimum height ranging from 15mm to 60 mm.

8. The airfoil body arrangement of claim 6, characterized in that an end of the second flow guide portion (422) remote from the first flow guide portion (421) is provided with a cambered surface structure (424);

the side part of the first smoke guide device (410) is provided with a second smoke inlet (4111), and the free end of the cambered surface structure (424) extends towards the direction of the second smoke inlet (4111).

9. The airfoil body arrangement according to claim 8, characterized in that an angle between a tangent plane at the free end of the cambered surface structure (424) and a horizontal plane is in the range of 20 ° to 70 °;

and/or the included angle between the side surface of the smoke collecting hood (300) opposite to the cambered surface structure (424) and the horizontal plane ranges from 20 degrees to 70 degrees.

10. The airfoil body arrangement according to any of claims 1-9, characterized in that the first smoke guide means (410) is provided with a second smoke inlet (4111) on each of the left, right and front sides;

the ratio of the area of the second smoke inlet (4111) located on the front side to the area of the second smoke inlet (4111) located on the left or right side ranges from 0.6 to 2.5.

11. The airfoil body arrangement according to claim 10, wherein the second smoke inlet (4111) at least one of a left side, a right side and a front side of the first smoke guide means (410) is non-uniformly arranged.

12. The airfoil body arrangement according to any of claims 1-11, characterized in that the airfoil body arrangement (400) further comprises a connecting means by which the first smoke guide means (410) and the second smoke guide means (420) are detachably connected.

13. The airfoil body arrangement according to claim 12, wherein the connection means includes a first connection (431) and a second connection (432);

the first connecting pieces (431) are arranged on the left side and the right side of the second smoke guide device (420), and first connecting parts suitable for being detachably connected with the first connecting pieces (431) are respectively arranged on the left side and the right side of the first smoke guide device (410);

the second connecting piece (432) is arranged on the front side and the rear side of the first smoke guide device (410), and the front side and the rear side of the second smoke guide device (420) are respectively provided with a second connecting portion which is suitable for being detachably connected with the second connecting piece (432).

14. The airfoil body arrangement according to claim 13, wherein the first connection member (431) comprises a mounting portion (4311) and a locking portion (4312) connected to or integrally provided with each other, the mounting portion (4311) being rotatably provided to the second smoke guide means (420);

the locking part (4312) can rotate along with the mounting part (4311) to be clamped with or separated from the edge of the first smoke guide device (410).

15. The airfoil body arrangement according to claim 13, wherein the second connection member (432) comprises a mounting seat (4321) and a collision bead (4322) provided to the mounting seat (4321) and capable of extending or retracting relative to the mounting seat (4321);

the collision bead (4322) can be clamped or separated from a limiting structure (4251) arranged on the second smoke guide device (420).

16. The airfoil body arrangement of claim 12, characterized in that the first fume guiding means (410) is provided with a retaining ring (440) at a top thereof, the retaining ring (440) having a top connected to a bottom of the fume collecting hood (300), the retaining ring (440) having a bottom connected to the top of the first fume guiding means (410).

17. A range hood, characterized by comprising an airfoil body arrangement (400) according to any of claims 1-16.