CN212430985U - Fume exhaust fan - Google Patents

Abstract

The application relates to household electrical appliances technical field discloses a lampblack absorber includes: the device comprises a flue, a dynamic oil net, a first oil guide ring and a second oil guide ring. The dynamic oil screen is arranged in the flue or at a port of the flue and comprises a first oil screen part and a second oil screen part concentrically arranged with the first oil screen part, and the diameter of the second oil screen part is smaller than that of the first oil screen part; the first oil guide ring is sleeved on the periphery of the first oil screen part; the second oil guide ring is sleeved on the periphery of the second oil net part and communicated with the first oil guide ring. In this application, establish first oil ring of leading at first oil net portion border cover, second oil net portion border cover is established the second and is led the oil ring, and first oil ring and the second of leading communicate between the oil ring, makes first oil ring and the second of leading lead the oil ring and collect the oil stain on first oil net portion and the second oil net portion respectively to concentrate on going on together, the oil stain that the cigarette produced that condenses on the whole dynamic oil net of collection that can be more convenient.

Description

Fume exhaust fan

Technical Field

The application relates to the technical field of household appliances, for example to a range hood.

Background

At present, an oil net of a household range hood is generally a single-layer metal oil net or a multi-layer common metal oil net, and due to the fact that the aperture of the oil net is large, the interception efficiency is low, and the oil smoke interception rate of the oil net is about 30%. If the size of the mesh on the oil screen is reduced, the effect of improving the oil smoke interception rate is limited, and the wind resistance can be increased, the oil screen can capture particles in oil smoke through rotation by arranging the dynamic oil screen in the related technology, so that the oil smoke interception rate of the whole machine can be improved on the premise of small air loss.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

when two dynamic oil nets with different diameters are adopted for filtering oil smoke, oil stains attached to the oil nets are inconvenient to collect.

SUMMERY OF THE UTILITY MODEL

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides a range hood to solve when adopting the oil net of the different developments of two diameters to carry out the oil smoke and filter, to the inconvenient problem of collecting of attached to the oil stain on the oil net.

In some embodiments, a range hood includes: the device comprises a flue, a dynamic oil net, a first oil guide ring and a second oil guide ring. The dynamic oil screen is arranged in the flue or at a port of the flue and comprises a first oil screen part and a second oil screen part concentrically arranged with the first oil screen part, and the diameter of the second oil screen part is smaller than that of the first oil screen part; the first oil guide ring is sleeved on the periphery of the first oil screen part; the second oil guide ring is sleeved on the periphery of the second oil net part and communicated with the first oil guide ring.

The range hood provided by the embodiment of the disclosure can realize the following technical effects:

first oil ring of leading is established to the cover in first oil net portion week, and second oil ring is led to second oil net portion week cover establishment second, and first oil ring and the second of leading lead between the oil ring intercommunication, make first oil ring and the second of leading lead the oil ring collect the oil stain in first oil net portion and the second oil net portion respectively to concentrate on going on together, the oil stain that can more convenient collection whole developments oil net oil smoke produced that condenses.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:

fig. 1 is a schematic structural diagram of an oil screen for filtering oil smoke provided in an embodiment of the present disclosure;

FIG. 2 is a schematic structural view of a first oil screen section and a second oil screen section provided by an embodiment of the present disclosure;

FIG. 3 is a schematic view of an installation structure of an oil screen section according to an embodiment of the present disclosure;

FIG. 4 is a schematic view of an installation structure of a sleeve and a rotating shaft according to an embodiment of the disclosure;

FIG. 5 is a schematic diagram of an oil screen section provided by an embodiment of the present disclosure;

fig. 6 is an exploded schematic view of a range hood provided by the embodiment of the present disclosure;

fig. 7 is a schematic view of an internal structure of a range hood provided by the embodiment of the present disclosure;

fig. 8 is a schematic view of a combined structure among the second oil screen portion, the first oil guide ring and the second oil guide ring provided in the embodiment of the present disclosure;

fig. 9 is a side cross-sectional view of a combination of the first oil network portion and the second oil network portion and the first oil guide ring and the second oil guide ring provided in the embodiment of the present disclosure.

Reference numerals:

100. an oil screen section; 101. a pore; 102. a first oil screen section; 103. a second oil screen section; 104. a sleeve; 105. an annular region; 200. a power section; 201. a rotating shaft; 202. connecting ribs; 300. a flue; 400. a dynamic oil screen; 500. a first oil guide ring; 501. a first collecting section; 502. an oil guide part; 503. an oil cup; 600. a second oil guide ring; 601. a second collecting section; 602. an oil sump; 603. a connecting rod; 700. and (4) a protection net.

Detailed Description

So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.

The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the disclosed embodiments and their examples and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation. Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art as appropriate.

In addition, the terms "disposed," "connected," and "secured" are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. Specific meanings of the above terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art according to specific situations.

The term "plurality" means two or more unless otherwise specified.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

Referring to fig. 1-5, in some embodiments, an oil screen for filtering oil smoke includes: an oil screen section 100 and a power section 200. A plurality of oil screen parts 100 are provided, each oil screen part is provided with a pore 101, the plurality of oil screen parts 100 are concentrically stacked, and the diameters of the oil screen parts increase layer by layer; the power unit 200 is connected to the center of the oil network unit 100, and is configured to rotate the oil network unit 100.

Adopt the oil net for filtering oil smoke that this disclosed embodiment provided, through setting up multilayer oil net portion 100, and the diameter successive layer of oil net portion 100 enlarges, the less oil net portion 100 rotation of diameter is favorable to the oil smoke in centre of a circle region to the circumferential edge reason towards oil smoke gas flow direction that the diameter is less during the use, and centre of a circle department oil net is more for the number of piles in circumferential edge reason, is favorable to improving the oil smoke interception rate in oil net portion 100 centre of a circle region.

Alternatively, the diameter of the oil screen portion 100 located one layer on the windward side is enlarged layer by layer toward the diameter of the oil screen portion 100 located one layer on the leeward side. Therefore, the rotation of the oil screen part 100 with the smaller windward side diameter is beneficial to guiding the oil smoke in the circle center area of the oil screen part 100 with the larger leeward side diameter to the circumferential area, so that the oil smoke interception rate of the circle center area of the oil screen part 100 with the larger diameter is improved, and the oil smoke interception rate of the whole oil screen is further improved.

Alternatively, the power part 200 is a motor, and a rotating shaft 201 of the motor is connected to the center of the oil screen part 100. Thus, when the power part 200 drives the oil net part 100 to rotate, the oil net part 100 is stressed uniformly.

Optionally, the plurality of oil screen sections 100 comprises: a first oil network portion 102 having a first diameter; and a second oil network part 103 having a second diameter, which is half of the first diameter. Therefore, when the second oil screen part 103 rotates, the oil smoke in the circle center area of the first oil screen part 102 can be uniformly guided to the circumferential area, and the oil smoke interception rate of the oil screen part 100 is improved.

Optionally, the second oil network portion 103 is on the windward side with respect to the first oil network portion 102. In this way, the second oil screen part 103 on the windward side rotates to uniformly guide the oil smoke in the circle center area of the first oil screen part 102 to the circumferential area, thereby improving the oil smoke interception rate of the oil screen part 100.

Alternatively, the closer the oil screen portion 100 is to the windward side, the larger the pore diameter of the pores 101 thereof. Therefore, the oil smoke with different particle sizes is intercepted according to the different pore sizes of the oil screen part 100, the oil screen part 100 with the large pore size intercepts the oil smoke with large particles, the oil screen part 100 with the small pore size intercepts the oil smoke with small particles, and therefore the oil smoke with different particle sizes can be intercepted, and the oil smoke interception rate is improved.

Alternatively, the pore diameters of the pores 101 on the oil mesh part 100 on the leeward side one layer are enlarged layer by layer toward the pore diameters of the pores 101 on the oil mesh part 100 on the windward side one layer. Therefore, when oil smoke enters the oil screen part 100, large-particle oil smoke particles are intercepted first, small-particle oil smoke particles are intercepted later, and the oil smoke interception rate is improved.

Optionally, each oil screen portion 100 is circular, and the apertures 101 are arc-shaped groove structures that diverge outwardly along the center of the oil screen portion 100. Like this, the hole 101 of arc wall structure has the radian, can have different functions according to the difference of hole 101 radian direction, and the crooked direction of radian of hole 101 is the same with the rotatory direction of oil net portion 100, can reduce the wind of oil net portion 100 when rotatory and cut the noise, and when the crooked direction of radian of hole 101 was opposite with the rotatory direction of oil net portion 100, usable hole 101 of oil net portion 100 cut and strike oil smoke gas stream and improve the interception efficiency of oil smoke.

Alternatively, the apertures 101 of adjacent oil mesh portions 100 are bent in opposite directions. Therefore, when the oil smoke passes through the two adjacent oil net parts 100, the wind cutting noise of the oil net parts 100 can be reduced, the cut area of the oil smoke gas flow can be increased, and the oil smoke interception efficiency is improved.

Alternatively, in two adjacent oil screen portions 100, the bending direction of the apertures 101 of the oil screen portion 100 on the windward side is opposite to the rotation direction of the oil screen portion 100, and the bending direction of the apertures 101 of the oil screen portion 100 on the leeward side is the same as the rotation direction of the oil screen portion 100. As described above, since the oil smoke concentration that the oil mesh part 100 located at the windward side contacts first is high, the oil smoke flow is cut by the pores 101 whose bending direction is opposite to the rotation direction of the oil mesh part 100, the oil smoke interception rate of the oil mesh part 100 can be improved, and the wind-cut noise of the oil mesh part 100 can be reduced since the bending direction of the pores 101 of the oil mesh part 100 located at the leeward side is the same as the rotation direction of the oil mesh part 100, thereby improving the oil smoke interception rate of the oil mesh part 100 while reducing the noise.

Optionally, the gap between adjacent oil screen sections 100 is adjustable. Like this, can adjust the clearance between a plurality of oil net portions 100, can not only prevent that the clearance between a plurality of oil net portions 100 is less to shorten the time that a plurality of oil net portions 100 cut oil smoke gas stream, influences the interception rate of oil smoke, can also prevent that the clearance between a plurality of oil net portions 100 is great to produce the vortex between oil net portions 100, influences the water conservancy diversion of oil smoke to oil smoke interception rate has been improved.

Optionally, a sleeve 104 is disposed in the center of the oil screen portion 100, and the oil screen portion 100 is fixed on the rotating shaft 201 of the motor through the sleeve 104. Thus, the gap between the oil screen parts 100 can be adjusted by moving the position of the sleeve 104 on the rotating shaft 201, and the operation is convenient.

Alternatively, the sleeve 104 is fixed to the center of the oil pan section 100 by welding. This makes the connection between the oil mesh portion 100 and the sleeve 104 more stable.

Optionally, the sleeve 104 is sleeved on the rotating shaft 201 of the motor and can move on the rotating shaft 201. In this way, it is convenient to adjust the gap between the oil pan sections 100 by moving the sleeve 104.

Optionally, a screw is disposed on the sleeve 104, and the sleeve 104 is fixed on the rotating shaft 201 by the screw. Thus, the screw on the sleeve 104 can be rotated to make the end of the screw close to the rotating shaft 201 abut against the rotating shaft 201 to fix the sleeve 104, and further to fix the oil screen part 100, which is convenient for operation.

Alternatively, multiple oil network portions 100 are driven by the same power portion 200. Like this, make a plurality of oil net portions 100 can synchronous revolution through the drive of same power portion 200, the atress is even, does benefit to the water conservancy diversion of oil smoke between a plurality of oil net portions 100, has improved the interception rate of oil smoke.

Optionally, each oil screen portion 100 is divided into a plurality of annular regions 105 from the center to the circumference, and the bending direction of the apertures 101 in the partial annular regions 105 is opposite to that of the remaining partial annular regions 105. In this way, by utilizing the characteristic that the bending directions of the apertures 101 in the partial annular area 105 and the rest partial annular area 105 on the oil screen part 100 are opposite, the oil screen part 100 can reduce wind-cut noise and improve the oil smoke interception effect.

Alternatively, the annular region 105 near the circumference of the oil screen portion 100 may be curved in a direction opposite to the direction of curvature of the aperture 101 in the annular region 105 near the center of the oil screen portion 100. Thus, due to the action of centrifugal force, the oil smoke density of the circle center area is low when the oil screen part 100 rotates, and the oil smoke density of the circumference area is high, so that the bending directions of the holes 101 in the annular area 105 close to the circumference of the oil screen part 100 and the annular area 105 close to the circle center of the oil screen part 100 are opposite, noise is reduced, and the oil smoke interception effect is improved.

Alternatively, the apertures 101 in the annular region 105 near the circumference of the oil screen portion 100 are bent in the same direction as the rotation direction of the oil screen portion 100, and the apertures 101 in the annular region 105 near the center of the oil screen portion 100 are bent in the opposite direction to the rotation direction of the oil screen portion 100. Therefore, the linear velocity of the circle center area of the oil screen part 100 in the rotating process is smaller than that of the circumference area, so that the oil fume interception rate of the circle center area is lower, the wind-cut noise of the circumference area is higher, the wind-cut noise of the circumference area can be reduced by the annular area 105 close to the circumference of the oil screen part 100, the hole 101 in the annular area 105 close to the circle center of the oil screen part 100 can cut and impact with the oil fume flow, and the oil fume interception rate of the circle center area is improved.

Alternatively, the annular regions 105 are arranged in pairs, the circle near the oil screen portion 100 refers to the one of the paired annular regions 105 that is closer to the circumference of the oil screen portion 100, and the circle center near the oil screen portion 100 refers to the one of the paired annular regions 105 that is closer to the circle center of the oil screen portion 100. Therefore, the characteristic that the bending directions of the pores 101 in different annular areas 105 are different can be utilized to achieve the effect of reducing noise or improving the oil smoke interception rate.

Alternatively, the diameters of the plurality of oil mesh parts 100 increase layer by layer from the windward side to the leeward side. Therefore, the rotation of the oil screen part 100 on the windward side is beneficial to guiding the oil smoke in the circle center area of the oil screen part 100 on the leeward side to the circumferential area, and the oil smoke interception rate in the circle center area of the oil screen part 100 on the leeward side is beneficial to improving, so that the oil smoke interception rate of the whole oil screen is improved.

Referring to fig. 6-9, in some embodiments, a range hood includes the oil screen for filtering oil smoke of any of the above embodiments.

In some embodiments, a range hood, comprising: the flue 300, the dynamic oil screen 400, the first oil guide ring 500 and the second oil guide ring 600. A dynamic oil screen 400 disposed inside or at a port of the flue 300, and including a first oil screen portion 102 and a second oil screen portion 103 concentrically disposed with the first oil screen portion 102, a diameter of the second oil screen portion 103 being smaller than a diameter of the first oil screen portion 102; a first oil guide ring 500 which is sleeved on the periphery of the first oil screen part 102; and the second oil guide ring 600 is sleeved on the periphery of the second oil screen part 103 and is communicated with the first oil guide ring 500.

Adopt the lampblack absorber that this disclosed embodiment provided, establish first oil ring 500 of leading at first oil net portion 102 periphery cover, second oil ring portion 103 periphery cover is established the second and is led oil ring 600, and first oil ring 500 and the second of leading lead and communicate between the oil ring 600, make first oil ring 500 and the second of leading lead oil ring 600 collect the oil stain on first oil net portion 102 and the second oil net portion 103 respectively, and concentrate and go on together, the oil stain that the smoke condenses the production on the whole dynamic oil net 400 that can be more convenient collects.

Alternatively, the power part 200 is fixed to the inner wall of the flue 300 by welding through the connecting rib 202. In this way, the power unit 200 is welded and fixed to the inner wall of the flue 300 by the connecting ribs 202, so that the power unit 200 is more stable, and vibration and noise generated when the power unit 200 works are reduced.

Optionally, a preset angle is provided between the oil screen portion 100 and the horizontal plane. Therefore, oil stains intercepted on the dynamic oil screen 400 can smoothly flow down, and the dynamic oil screen 400 can be cleaned conveniently.

Optionally, the first oil guiding ring 500 and the second oil guiding ring 600 are both installed in parallel with the oil screen part 100. Like this for the plane of first oil ring 500 and the second oil ring 600 of leading is parallel with the plane of oil net portion 100, does benefit to first oil ring 500 and the second oil ring 600 of leading and collects the oil stain of throwing away when dynamic oil net 400 is rotatory, prevents that the oil stain from outwards sputtering.

Optionally, the first oil guiding ring 500 includes: a first collecting portion 501 fitted around the first oil network portion 102; oil guide 502 is provided below first collecting portion 501. Like this, collect the oil stain that first oil net part 102 threw away through first collection portion 501 to through setting up the oil guide portion 502 with the oil stain water conservancy diversion in first collection portion 501 downside, be convenient for first oil net part 102's cleanness.

Optionally, the first oil guiding ring 500 is detachably mounted at the port of the flue 300. In this way, the first oil ring 500 is easily removed for maintenance.

Alternatively, the oil guide portion 502 is a rectangular groove with a circular through hole in the middle. Thus, the oil guide part 502 can smoothly guide the collected oil stains out, and the oil stains are prevented from leaking.

Optionally, the diameter of the circular through opening is larger than the diameter of the first oil mesh part 102. Therefore, external oil smoke can smoothly enter the first oil screen part 102 through the oil guide part 502, and oil stains in the oil smoke are conveniently intercepted by the dynamic oil screen 400.

Optionally, the first collecting portion 501 is a flange protruding upward relative to the oil guide portion 502, and the first collecting portion 501 and the oil guide portion 502 are connected by welding. Therefore, the first collecting part 501 can better collect oil stains thrown out by the first oil screen part 102, and oil stain sputtering is prevented.

Optionally, the second oil guiding ring 600 includes: a second collecting portion 601 fitted around the second oil network portion 103; oil groove 602 communicates second collecting portion 601 with oil guide portion 502. Like this, collect the oil stain that second oil net portion 103 threw away through second collection portion 601 to carry out unified water conservancy diversion in leading oil portion 502 with the oil stain water conservancy diversion through oil groove 602, the cleanness of the second oil net portion 103 of being convenient for.

Alternatively, the second collecting portion 601 is a ring groove, and the inner diameter of the ring groove is larger than the diameter of the second oil mesh portion 103. Therefore, the second collecting part 601 can not block the oil smoke from entering the second oil screen part 103, and the second collecting part 601 is convenient to collect the oil stain thrown out by the second oil screen part 103.

Alternatively, oil groove 602 is disposed at the lowermost end of second collecting portion 601, and oil groove 602 and second collecting portion 601 are welded. In this way, the oil stain collected in the second collecting portion 601 is facilitated to be guided out while the stability of the oil groove 602 is enhanced.

Optionally, the second oil guiding ring 600 is welded and fixed to the first oil guiding ring 500 through the connecting rod 603. Like this, carry out welded fastening through connecting rod 603 between with second oil ring 600 and first oil ring 500, make second oil ring 600 more firm, prevent that second oil ring 600 from droing.

Optionally, the oil guide portion 502 is lower than the second collection portion 601. Thus, as the oil guiding part 502 is lower than the second collecting part 601, oil stains collected in the second collecting part 601 can flow into the oil guiding part 502 under the action of gravity, and the oil stains can be guided conveniently.

Optionally, a preset included angle is formed between the lower side surface of the oil guiding portion 502 and the horizontal plane. Therefore, oil stains in the oil guide part 502 can be smoothly guided out, and residues of the oil stains in the oil guide part 502 are reduced.

Optionally, the preset included angle is greater than or equal to 5 degrees and less than or equal to 45 degrees. Like this for oil guide portion 502 inclines for the horizontal plane, is favorable to the oil stain derivation in oil guide portion 502, reduces the residue of oil stain in oil guide portion 502.

Optionally, an oil cup 503 is disposed under the lowest end of the oil guide 502. Like this for the oil stain that leads oil portion 502 to derive can flow into oil cup 503 smoothly in, the storage of the oil stain of being convenient for prevents that the oil stain from leaking outward.

Optionally, the oil cup 503 is detachably disposed at the lowest end of the oil guide portion 502. Thus, the oil cup 503 can be detached easily to clean the oil stain in the oil cup 503.

Optionally, the oil cup 503 is strip-shaped. Like this for oil cup 503 can store more oil stain when not sheltering from dynamic oil net 400, prevents that the oil stain from leaking outward.

Optionally, the radial size difference between the first oil guide ring 500 and the first oil screen part 102 and the radial size difference between the second oil guide ring 600 and the second oil screen part 103 are both L, and L is greater than or equal to 3mm and less than or equal to 10 mm. Like this, be convenient for first oil ring 500 cover establish on first oil mesh portion 102, the second oil ring 600 cover is established on second oil mesh portion 103, does not influence the rotatory better oil stain to intercepting on the dynamic oil mesh 400 of dynamic oil mesh 400 and collects, prevents that oil stain spatters when dynamic oil mesh 400 rotates.

Optionally, the vertical height difference of the assembly of the first oil guiding ring 500 and the first oil screen part 102 and the vertical height difference of the assembly of the second oil guiding ring 600 and the second oil screen part 103 are both B, and B is greater than or equal to 2mm and less than or equal to 5 mm. Like this, make first oil ring 500 and first oil net portion 102, second oil ring 600 and the second oil net portion 103 between all there is vertical difference in height, be convenient for carry out the water conservancy diversion to the oil stain of collecting when not influencing dynamic oil net 400 rotation, prevent oil stain sputtering.

Optionally, the range hood further comprises: and a protection net 700 disposed under the dynamic oil net 400. Thus, the user can be protected from contacting the rotating dynamic oil screen 400 during use, and the safety is improved.

Alternatively, the protection net 700 is detachably mounted on the first oil ring 500, and the mounted protection net 700 is concentric with the first oil net part 102. Therefore, the protection net 700 is convenient to detach and maintain, and the installed protection net 700 does not influence the oil smoke entering the flue 300 and is cleaned by the dynamic oil net 400.

Optionally, protective netting 700 is covered with an oil-repellent coating. Like this, reduce the attached of oil stain on protection net 700, prevent to attach more oil stain influence oil smoke's suction on protection net 700.

Optionally, the oil-repellent coating is a nanosilica coating. Thus, the nano-silica is sprayed on the protection net 700 to prevent oil stain from being condensed on the protection net 700, and to maintain the cleanness of the protection net 700.

The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. A range hood, comprising:

a flue;

the dynamic oil screen is arranged in the flue or at a port of the flue and comprises a first oil screen part and a second oil screen part concentrically arranged with the first oil screen part, and the diameter of the second oil screen part is smaller than that of the first oil screen part;

the first oil guide ring is sleeved on the periphery of the first oil screen part;

and the second oil guide ring is sleeved on the periphery of the second oil screen part and communicated with the first oil guide ring.

2. The range hood of claim 1, wherein the first oil ring comprises:

the first collecting part is sleeved on the periphery of the first oil net part;

and an oil guide part arranged at the lower side of the first collecting part.

3. A range hood as set forth in claim 2, wherein said second oil guide ring includes:

the second collecting part is sleeved on the periphery of the second oil net part;

and the oil groove is communicated with the second collecting part and the oil guide part.

4. A hood fan according to claim 3, characterized in that said oil guiding portion is lower than said second collecting portion.

5. A range hood as claimed in claim 2, wherein a preset included angle is formed between the lower side surface of the oil guide part and the horizontal plane.

6. A range hood as claimed in claim 5, wherein the preset included angle is greater than or equal to 5 degrees and less than or equal to 45 degrees.

7. A range hood as set forth in claim 5, wherein an oil cup is provided under the lowermost end of the oil guide portion.

8. A range hood as claimed in any one of claims 1 to 7, wherein the radial dimension difference between the first oil ring and the first oil screen portion and the radial dimension difference between the second oil ring and the second oil screen portion are both L, and L is greater than or equal to 3mm and less than or equal to 10 mm.

9. A range hood as claimed in any of claims 1 to 7, wherein the vertical height difference of the assembly of the first oil ring and the first oil screen portion and the vertical height difference of the assembly of the second oil ring and the second oil screen portion are both B, and B is 2mm or more and 5mm or less.

10. A range hood according to any of claims 1 to 7, further comprising: and the protection net is arranged on the lower side of the dynamic oil net.

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