A double-layer oil screen structure and a range hood

Abstract

A double-layer oil screen structure includes a first deflector plate and a second deflector plate which are stacked and installed up and down. The first deflector plate is provided with a plurality of lower air inlet holes arranged at intervals from left to right. Oil guide grooves with upward openings are provided on both the left and right sides of the lower air inlet holes. The second deflector plate is provided with a plurality of upper air inlet holes arranged at intervals from left to right. The lower air inlet holes and the upper air inlet holes are arranged in a staggered manner, and the upper air inlet holes are placed above the openings of the oil guide grooves. By installing an oil screen structure composed of multiple groups of double-layer oil screen structure modules on the range hood, compared with the traditional integral double-layer oil screen structure inside and outside, the present invention not only has simple production operations, is applicable to range hoods of different sizes, but also is convenient for installation and disassembly, which is beneficial for users to clean the range hood and improves the user experience. The present invention also introduces a range hood applying the above double-layer oil screen structure.

Description

Technical Field

[0001] The present invention belongs to the technical field of kitchen appliances, and specifically relates to a double-layer oil screen structure and a range hood. Background Art

[0002] At present, there are various types of range hoods on the market. According to the installation position of the range hood, they are divided into three types: top suction type, side suction type, and bottom suction type. The top suction type range hood utilizes the principle of hot air rising to suck and exhaust the naturally rising oil fumes generated during cooking. The side suction type range hood uses the technology of air intake from the side and oil fume separation to effectively separate the oil fumes and achieve the effect of completely exhausting the oil fumes. The bottom suction type range hood sucks the oil fumes into the fan from the lower hood and then discharges them to the outside. Among them, the oil screens of the side suction type and bottom suction type range hoods generally adopt the overall double-layer oil screen structure design inside and outside. This double-layer oil screen is very inconvenient to disassemble, and it is easy to cause the situation that the inner layer oil screen and the outer layer oil screen are scattered and dropped when disassembling the oil screen.

[0003] Chinese Patent with application number 201720462719.6 discloses a double-layer inclined oil screen applied to a range hood, which includes an oil dripping layer and an oil box layer. The oil dripping layer is placed above the oil box layer; a plurality of oil dripping channels are provided on the bottom surface of the oil dripping layer, and the oil dripping channels include a plurality of groove structures; a plurality of long strip-shaped convex strips and grooves are provided on the bottom surface of the oil box layer, and the convex strips and grooves are arranged alternately; the bottom surface of the oil dripping layer is parallel to the bottom surface of the oil box layer, and each side surface of the oil dripping layer is parallel to the corresponding side surface of the oil box layer. The lighter oil in the grease adheres to the oil dripping layer, and the heavier oil in the grease drips into the oil box layer through the oil dripping channels. However, this double-layer oil screen not only has a cumbersome installation and disassembly process, but also is not easy to clean. Therefore, how to improve the performance of the oil screen in filtering oil fumes and absorbing grease, and at the same time realize the rapid installation and disassembly of the oil screen is an urgent technical problem to be solved.

[0004] In view of this, the present invention is specifically proposed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and provide a double-layer oil screen structure and a range hood, which realize the rapid installation and disassembly of the double-layer oil screen structure and are applicable to range hoods of different specifications.

[0006] To solve the above technical problem, the basic concept of the technical solution adopted by the present invention is:

[0007] A double-layer oil screen structure includes a first guide plate and a second guide plate stacked and installed up and down. A plurality of lower air inlet holes are arranged at intervals from left to right on the first guide plate. Oil guide grooves with upward openings are provided on both the left and right sides of the lower air inlet holes. A plurality of upper air inlet holes are arranged at intervals from left to right on the second guide plate. The lower air inlet holes and the upper air inlet holes are arranged in a staggered manner, and the upper air inlet holes are placed above the openings of the oil guide grooves.

[0008] Further, the lower air inlet holes are strip-shaped openings horizontally extending along the front-back direction of the first deflector plate, and the upper air inlet holes are strip-shaped openings horizontally extending along the front-back direction of the second deflector plate.

[0009] Further, the oil guide groove is a strip-shaped groove with an upward opening and side walls on both left and right sides, horizontally extending along the front-back direction of the lower air inlet holes on both left and right sides.

[0010] Further, the first deflector plate is provided with first oil guide walls extending upward around the left and right side edges of the lower air inlet holes, and the extending ends of the first oil guide walls incline towards the lower air inlet holes. The first deflector plate between adjacent lower air inlet holes is the first deflector part, and the first oil guide walls between adjacent lower air inlet holes are integrally connected through the first deflector part to enclose an oil guide groove, and the oil guide groove is a groove with an upward opening, being narrow at the bottom and wide at the top.

[0011] Further, the second deflector plate is provided with second oil guide walls extending downward around the left and right side edges of the upper air inlet holes, and the extending ends of the second oil guide walls incline towards the air inlet holes. The second deflector plate between adjacent upper air inlet holes is the second deflector part, and the second oil guide walls between adjacent lower air inlet holes are integrally connected through the second deflector part.

[0012] Further, the first deflector part and the second deflector part are arranged in a staggered manner, and the first deflector part and / or the second deflector part is a strip-shaped flat plate.

[0013] Further, the first oil guide walls on both left and right sides of the lower air inlet holes are placed below the second deflector part, and the second oil guide walls on both left and right sides of the upper air inlet holes are placed above the first deflector part, and the first oil guide wall and / or the second oil guide wall is a strip-shaped folded edge.

[0014] Further, the upper air inlet holes are correspondingly arranged with the oil guide grooves, and the extending ends of the second oil guide walls extending downward on both left and right sides of the upper air inlet holes are placed above the opening of the same oil guide groove. The upper air inlet holes and the lower air inlet holes are arranged in a staggered manner and are connected through an interval space.

[0015] Further, the first deflector plate is provided with a gripping member, and the left and right ends of the gripping member axially extend downward through the groove bottom of the oil guide groove.

[0016] The present invention also provides an oil fume machine, which is installed with the above double-layer oil net structure. Multiple groups of double-layer oil net structure modules are arranged in parallel from left to right to form an oil net structure, and the front end of the oil net structure is installed on the oil fume machine in an upwardly inclined manner.

[0017] After adopting the above technical solutions, the present invention has the following beneficial effects compared with the prior art.

[0018] Through the above double-layer oil screen structure, especially when multiple groups of double-layer oil screen structure modules are arranged in parallel from left to right to form an oil screen structure and installed on the range hood, compared with the traditional integral double-layer oil screen structure inside and outside, it is not only simple in production operation, applicable to range hoods of different sizes, but also convenient for installation and disassembly, which is beneficial for users to clean the range hood; the oil guide groove realizes the preliminary filtration of oil fume, and the second oil guide wall conducts secondary filtration on the oil fume, increasing the number of collisions between the oil fume and the ventilation side, promoting the condensation of grease to form oil droplets, and improving the filtration performance of the double-layer oil screen structure; the oil guide groove is a strip-shaped groove with an upward opening and side walls on both left and right sides, and the extended end of the oil guide wall is placed above the opening of the oil guide groove to prevent oil dripping or oil leakage from occurring in the oil screen, thus enhancing the user experience.

[0019] The following further describes in detail the specific embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] As part of the present invention, the accompanying drawings are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention, but do not constitute an improper limitation on the present invention. Obviously, the accompanying drawings in the following description are only some embodiments, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts. In the drawings:

[0021] Figure 1 is the installation schematic diagram of a double-layer oil screen structure in an embodiment of the present invention;

[0022] Figure 2 is Figure 1 the partial enlarged view at A in

[0023] Figure 3 is the top view of a double-layer oil screen structure in an embodiment of the present invention;

[0024] Figure 4 is Figure 3 the enlarged view at B in

[0025] Figure 5 is Figure 3 the sectional view taken along the C-C direction in

[0026] Figure 6 is Figure 5 the partial enlarged view at D in

[0027] Figure 7 is the side view of a double-layer oil screen structure in an embodiment of the present invention.

[0028] In the figure: 100, double-layer oil screen structure module; 1, first deflector; 11, oil guide groove; 111, first oil guide wall; 112, first deflector part; 12, lower air inlet hole; 2, second deflector; 211, second oil guide wall; 212, second deflector part; 22, upper air inlet hole; 3, gripping member; 4, nut; 5, oil sump; 6, oil leakage hole; 7, positioning protrusion.

[0029] It should be noted that these drawings and textual descriptions are not intended to limit the scope of the concept of the present invention in any way, but to illustrate the concept of the present invention to those skilled in the art by reference to specific embodiments. Detailed implementation manners

[0030] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0031] In the description of the present invention, it should be noted that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0032] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] As Figures 1 to 7 shown, the present invention provides a double-layer oil screen structure, including a first deflector 1 and a second deflector 2 stacked and installed up and down. The first deflector 1 is provided with a plurality of lower air inlet holes 12 arranged at intervals from left to right. Oil guide grooves 11 with upward openings are provided on the left and right sides of the lower air inlet holes 12. The second deflector 2 is provided with a plurality of upper air inlet holes 22 arranged at intervals from left to right. The lower air inlet holes 12 and the upper air inlet holes 22 are arranged in a staggered manner. The upper air inlet holes 22 are located above the openings of the oil guide grooves 11. During the upward movement of the oil fume, it moves towards the lower air inlet holes 12, collides with the outer side surfaces of the oil guide grooves 11 multiple times, and then enters the interior of the range hood through the upper air inlet holes 22 to be further condensed into oil droplets, which drip into the grooves of the oil guide grooves 11, thereby achieving the purpose of filtering oil fume and condensing grease.

[0034] As Figure 1 and Figure 3 shown, in the present invention, multiple groups of double-layer oil screen modules 100 are arranged in parallel from left to right to form an oil screen structure. Preferably, there are 2 to 3 groups of double-layer oil screen modules 100. The size of the double-layer oil screen module 100 can be adjusted according to the size of the range hood, which is convenient for free combination design and applicable to range hoods of different specifications and types.

[0035] Through the above double-layer oil screen structure, especially the oil screen structure formed by arranging multiple groups of double-layer oil screen modules 100 in parallel from left to right, compared with the traditional integral double-layer oil screen structure inside and outside, the double-layer oil screen module 100 not only has a simple and reliable structure, can adjust the size of the double-layer oil screen module 100 according to different range hoods, is convenient for mass production and manufacturing, can realize quick installation and disassembly, but also is more conducive to users to clean the range hood; the double-layer oil screen structure includes a first guide plate 1 and a second guide plate 2. The first guide plate 1 is provided with an oil guide groove 11, and the opening of the oil guide groove 11 is correspondingly placed below the upper air inlet hole 22. The double-layer oil screen structure not only increases the number of collisions between the oil fume and the ventilation side surface, improves the filtering performance of the double-layer oil screen structure, but also the oil guide groove 11 is correspondingly arranged with the upper air inlet hole 22 to prevent the oil droplets formed after the oil fume condenses from falling from the opening of the upper air inlet hole 22, and avoid the phenomenon of oil leakage or dripping.

[0036] Embodiment 1

[0037] As Figure 1 and Figure 2 shown, in this embodiment, the double-layer oil screen module 100 includes a first guide plate 1. A plurality of lower air inlet holes 12 are arranged at intervals from left to right on the first guide plate 1. The lower air inlet holes 12 are long strip-shaped openings horizontally extending along the front and back directions of the first guide plate 1. Oil guide grooves 11 are correspondingly arranged on the left and right sides of the lower air inlet holes 12. Preferably, the adjacent lower air inlet holes 12 are of the same size and shape, and the centers of the lower air inlet holes 12 are on the axis of the first guide plate 1.

[0038] As Figure 1 and Figure 2 shown, in this embodiment, the oil guide grooves 11 horizontally extend along the front and back directions of the lower air inlet holes 12 on the left and right sides, and the oil guide grooves 11 are strip-shaped grooves with an upward opening and side walls on the left and right sides.

[0039] As Figure 1 and Figure 2As shown, in this embodiment, on the first deflector 1, there are first oil guiding walls 111 which surround the left and right side edges of the lower air inlet hole 12, extend upward and incline towards the lower air inlet hole 12. The first deflector 1 between adjacent lower air inlet holes 12 is the first deflector part 112. The first oil guiding walls 111 between adjacent lower air inlet holes 12 are integrally connected through the first deflector part 112 to form an oil guiding groove 11. The oil guiding groove 11 is a groove with an upward opening, narrower at the bottom and wider at the top.

[0040] As Figure 2 shown, in this embodiment, the first oil guiding wall 111 is a strip-shaped folded edge. Preferably, the first oil guiding wall 111 is a trapezoidal folded edge with a gradually decreasing width from the front end to the rear end, that is, the first oil guiding wall 111 is a folded edge wider at the front and narrower at the rear. The surface area of the ventilation side surface at the front end of the oil guiding groove 11 is larger than the surface area of the ventilation side surface at the rear end of the oil guiding groove 11, which is beneficial to increasing the collision probability with the ventilation side surface during the upward movement of the oil fume, enabling the oil fume to quickly condense into oil droplets and reducing the escape of oil fume.

[0041] As Figure 2 shown, in this embodiment, the first deflector part 112 is a strip-shaped flat plate. Preferably, the first deflector part 112 is a trapezoidal flat plate with a gradually increasing width from the front end to the rear end, which is beneficial to the oil droplets formed after the condensation of the oil fume flowing quickly from the front end to the rear end of the oil guiding groove 11, avoiding the aggregation of oil droplets and then the phenomenon of blocked downward flow, which is not conducive to keeping the oil mesh clean.

[0042] As Figure 1 and Figure 2 shown, in this embodiment, a holding part 3 is arranged on the first deflector 1. A threaded hole (not shown in the figure) is arranged at the bottom of the groove of the oil guiding groove 11. The left and right ends of the holding part 3 pass through the threaded holes at the bottom of the groove of the oil guiding groove 11 and extend axially downward.

[0043] In this embodiment, the holding part 3 is a U-shaped handle 3 made of metal or plastic. The U-shaped handle 3 includes a fixing part and a supporting part (not shown in the figure). Among them, the left and right sides of the opening of the U-shaped handle 3 are the fixing parts. The fixing parts are at least partially placed above the groove of the oil guiding groove 11. The fixing parts have threads and are cooperated with corresponding nuts 4, and the U-shaped handle 3 is firmly connected to the first deflector 1.

[0044] As Figure 1 and Figure 2 shown, in this embodiment, the opposite side of the opening end of the U-shaped handle 3 is the supporting part. The supporting part is located below the double-layer oil mesh module 100, especially on the lower side surface of the first deflector 1, which is convenient for the installation and disassembly of the double-layer oil mesh module 100. During the installation and disassembly process, in order to keep the balance of the entire double-layer oil mesh module 100, U-shaped handles 3 are respectively arranged on the left and right sides of the double-layer oil mesh module 100.

[0045] Through the above double-layer oil screen structure, especially the oil screen structure composed of multiple groups of double-layer oil screen modules 100, an oil guiding groove 11 with an upward opening and wider at the top and narrower at the bottom is provided on the first deflector 1 of the double-layer oil screen module 100. The cooking fumes enter the smoke collecting cavity through the lower air inlet holes 12 and collide with the ventilation side of the oil guiding groove 11, which is conducive to the condensation of the cooking fumes into oil droplets and realizes the preliminary filtration of the cooking fumes.

[0046] Embodiment Two

[0047] As Figures 3 to 6 shown, this embodiment is a further limitation of the above Embodiment One. In this embodiment, the double-layer oil screen module 100 includes a second deflector 2. A plurality of upper air inlet holes 22 are arranged at intervals from left to right on the second deflector 2. The upper air inlet holes 22 are long strip-shaped openings extending horizontally in the front-rear direction of the second deflector 2. Second oil guiding walls 211 extending downward are provided on the left and right sides of the upper air inlet holes 22, and the extending ends of the second oil guiding walls 211 are placed above the opening of the oil guiding groove 11. Preferably, the adjacent upper air inlet holes 22 are the same in size and shape, and the centers of the upper air inlet holes 22 are on the axis of the second deflector 2.

[0048] As Figure 3 and 4 shown, in this embodiment, second oil guiding walls 211 that surround the left and right side edges of the lower air inlet holes 12, extend downward and are inclined upward to the upper air inlet holes 22 are provided on the second deflector 2. The second deflector 2 between the adjacent upper air inlet holes 22 is a second guiding portion 212. The second guiding portion 212 is a long strip-shaped flat plate, and the second oil guiding walls 211 between the adjacent upper air inlet holes 22 are integrally connected through the second guiding portion 212.

[0049] As Figure 5 and Figure 6 shown, in this embodiment, the first oil guiding walls 111 on the left and right sides of the lower air inlet holes 12 are placed below the second guiding portion 212, and the second oil guiding walls 211 on the left and right sides of the upper air inlet holes 22 are placed above the first guiding portion 112.

[0050] As Figure 5 and Figure 6 shown, in this embodiment, the second oil guiding walls 211 are long strip-shaped folded edges. Preferably, the second oil guiding walls 211 are trapezoidal folded edges with the width gradually decreasing from the front end to the rear end, that is, the second oil guiding walls 211 are folded edges wider at the front and narrower at the rear, which is conducive to increasing the collision probability with the ventilation side during the upward movement of the cooking fumes, enabling the cooking fumes to quickly condense into oil droplets and preventing the phenomenon of cooking fumes escaping.

[0051] As Figure 5 and Figure 6As shown, in this embodiment, the lower air inlet holes 12 arranged on the first deflector 1 and the upper air inlet holes 22 arranged on the second deflector 2 horizontally extend along the front - rear direction of the first deflector 1 and the second deflector 2 respectively. The adjacent lower air inlet holes 12 and the adjacent upper air inlet holes 22 are parallel and symmetrical, and the lower air inlet holes 12 and the upper air inlet holes 22 are arranged in a staggered manner.

[0052] As Figure 5 and Figure 6 As shown, in this embodiment, the oil guide groove 11 is a strip - shaped groove with an upward opening and side walls on both left and right sides, horizontally extending along the front - rear direction of the lower air inlet holes 12 on both left and right sides. The extending ends of the second oil guide walls 211 on both left and right sides of the upper air inlet holes 22 are placed inside the opening of the same oil guide groove 11, preventing the oil droplets formed after the oil fume condenses through the oil guide groove 11 and the second oil guide walls 211 from falling from the openings of the lower air inlet holes 12 and the upper air inlet holes 22, which affects the user experience.

[0053] As Figure 5 and Figure 6 As shown, in this embodiment, the upper air inlet holes 22 are placed above the opening of the oil guide groove 11. The upper air inlet holes 22 and the lower air inlet holes 12 are arranged in a staggered manner and are connected through an interval space. The upper air inlet holes 22 are placed above the opening end of the oil guide groove 11 and the outer periphery of the upper air inlet holes 22 is completely placed inside the opening end of the oil guide groove 11, preventing the oil droplets formed after the oil fume condenses from falling from the openings of the lower air inlet holes 12 and the upper air inlet holes 22, which affects the user experience.

[0054] Through the above - mentioned double - layer oil screen structure, especially the oil guide groove 11 and the second oil guide walls 212 arranged up and down, the number of collisions between the oil fume and the ventilation side is increased, improving the filtering performance of the double - layer oil screen structure. The extending ends of the second oil guide walls 212 on both left and right sides of the upper air inlet holes 12 are placed inside the opening end of the same oil guide groove 11, preventing oil leakage or dripping.

[0055] Embodiment Three

[0056] In the embodiment of the present invention, there is also provided an oil screen structure having the double - layer oil screen structure described in any one of the above embodiments. Multiple groups of double - layer oil screen structure modules 100 are arranged in parallel from left to right to form an oil screen structure. The front end of the oil screen structure is installed on the range hood in an upward - inclined manner, and the size of the double - layer oil screen structure module 100 is adjusted according to the size of the range hood (not shown in the figure).

[0057] In this example, the range hood includes a chassis and a smoke collecting hood. The chassis is arranged above the smoke collecting hood. The smoke collecting hood is arranged at the bottom of the chassis and defines a smoke collecting cavity with the chassis. The front end of the double - layer oil screen module 100 is installed on the bottom of the smoke collecting hood in an upward - inclined manner. Three groups of double - layer oil screen modules 100 are arranged from left to right to form an oil screen structure, and the front end of the oil screen structure is installed on the bottom of the smoke collecting hood in an upward - inclined manner (not shown in the figure).

[0058] As Figure 7 shown, in this embodiment, a horizontally extending oil collecting trough 5 is provided below the double-layer oil screen module 100. The oil collecting trough 5 is a strip-shaped groove with an open top and side walls on the left and right sides. The bottom of the double-layer oil screen module 100 is correspondingly inserted into the groove of the oil collecting trough 5. A number of oil leakage holes 6 are provided at the bottom of the oil collecting trough 5. A positioning convex 7 extending downward is provided at the bottom of the oil collecting trough 5, and the end of the positioning convex 7 extending downward is bent outward to form a folded edge. The oil leakage holes 6 are communicated with the oil box and are provided above the oil box. The folded edge of the positioning convex 7 is fixedly corresponding to the lower side surface of the smoke collecting hood (not shown in the figure).

[0059] The above are only the preferred embodiments of the present invention, and do not impose any formal limitations on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present invention, can make some changes or modifications using the technical content prompted above into equivalent embodiments of equivalent changes. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A double-layer oil screen structure, comprising a first deflector plate and a second deflector plate which are stacked and installed up and down, and characterized in that: The first deflector plate is provided with a plurality of lower air inlet holes arranged at intervals from left to right. Oil guide grooves with upward openings are provided on the left and right sides of the lower air inlet holes. The second deflector plate is provided with a plurality of upper air inlet holes arranged at intervals from left to right. The lower air inlet holes and the upper air inlet holes are arranged in a staggered manner, and the upper air inlet holes are located above the openings of the oil guide grooves. The first deflector plate is provided with a first oil guide wall that extends upward around the left and right side edges of the lower air inlet holes. The extending end of the first oil guide wall inclines towards the lower air inlet hole. The first deflector plate between adjacent lower air inlet holes is the first deflector part. The first oil guide walls between adjacent lower air inlet holes are integrally connected through the first deflector part to form an oil guide groove. The oil guide groove is a groove with an upward opening, narrower at the bottom and wider at the top. The surface area of the ventilation side of the front end of the oil guide groove is larger than the surface area of the ventilation side of the rear end of the oil guide groove. The first deflector part is a trapezoidal flat plate with a gradually increasing width from the front end to the rear end; the first oil guide wall is a trapezoidal folded edge with a gradually decreasing width from the front end to the rear end. The second deflector plate is provided with a second oil guide wall that extends downward around the left and right side edges of the upper air inlet holes. The extending end of the second oil guide wall inclines towards the air inlet hole. The second deflector plate between adjacent upper air inlet holes is the second deflector part. The second oil guide walls between adjacent lower air inlet holes are integrally connected through the second deflector part. The second oil guide wall is a trapezoidal folded edge with a gradually decreasing width from the front end to the rear end. The second deflector part is a long strip flat plate.

2. The double-layer oil screen structure according to claim 1, characterized in that: The lower air inlet holes are long strip openings that horizontally extend along the front and rear directions of the first deflector plate, and the upper air inlet holes are long strip openings that horizontally extend along the front and rear directions of the second deflector plate.

3. A double-layer oil screen structure according to claim 2, characterized in that: The oil guide groove is a strip-shaped groove with an upward opening and side walls on the left and right sides, and horizontally extends along the front and rear directions of the lower air inlet holes on the left and right sides.

4. The double-layer oil screen structure according to claim 3, characterized in that: The first deflector part and the second deflector part are arranged in a staggered manner, and the first deflector part and / or the second deflector part is a long strip flat plate.

5. A double-layer oil screen structure according to claim 3, characterized in that: The first oil guide walls on the left and right sides of the lower air inlet holes are located below the second deflector part, and the second oil guide walls on the left and right sides of the upper air inlet holes are located above the first deflector part. The first oil guide wall and / or the second oil guide wall is a long strip folded edge.

6. A double-layer oil screen structure according to any one of claims 1 to 5, characterized in that: The upper air inlet holes are arranged corresponding to the oil guide grooves. The extending ends of the second oil guide walls that extend downward on the left and right sides of the upper air inlet holes are located above the opening of the same oil guide groove. The upper air inlet holes and the lower air inlet holes are arranged in a staggered manner and are connected through an interval space.

7. A double-layer oil screen structure according to claim 6, characterized in that: The first deflector plate is provided with a holding member, and the left and right ends of the holding member axially extend downward through the groove bottom of the oil guide groove.

8. A range hood, characterized in that: Install the double-layer oil screen structure according to any one of claims 1 to 7 above. Multiple groups of double-layer oil screen structure modules are arranged in parallel from left to right to form an oil screen structure, and the front end of the oil screen structure is installed on the range hood in an upward inclined manner.

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