An oil mesh structure and an oil fume machine

Abstract

The present invention discloses an oil screen structure, which includes a flow guiding plate. A number of air inlet holes are arranged in parallel from left to right on the flow guiding plate. Above the air inlet holes, there is a first oil guiding groove with an upward opening. On the left and right sides of the air inlet holes, there are respectively second oil guiding grooves with upward openings, and the first oil guiding groove and the second oil guiding groove are arranged in a staggered manner. Through the staggered arrangement of the first oil guiding groove and the second oil guiding groove, which is similar to a double-layer oil screen structure, the present invention is easier to clean, has a lower cost, is convenient for installation and disassembly compared with the traditional inner and outer double-layer oil screen structure, and helps the grease to condense into oil droplets, improving the smoke exhaust efficiency. The present invention also introduces a range hood applying the above oil screen structure.

Description

Technical Field

[0001] The present invention belongs to the technical field of kitchen utensils, and specifically relates to an oil mesh structure and a range hood. Background Art

[0002] During the production process of traditional Chinese cuisine, frying, stir-frying, cooking, and deep-frying account for a large proportion, and a large amount of cooking fumes are generated accordingly. This not only pollutes the kitchen environment but also affects human health. Therefore, the range hood has become one of the indispensable kitchen appliances in modern families.

[0003] Range hoods are generally divided into two types: top suction type and side suction type. The top suction type range hood utilizes the principle of hot air rising to suck and exhaust the naturally rising cooking fumes generated during cooking, while the side suction type range hood uses the technology of side air intake and oil fume separation to effectively separate the oil fumes, achieving an ideal oil fume extraction effect. Among them, the air inlet of the side suction type range hood is closer to the oil fume source, which can lock the generated oil fumes in the first time and effectively shorten the movement distance of the oil fumes rising, and the smoke exhaust effect is more ideal. Currently, the oil meshes of side suction type range hoods on the market generally adopt a double-layer oil mesh structure design.

[0004] Chinese Patent with application number 201720462719.6 discloses a double-layer inclined oil mesh applied to a range hood, which includes a drip layer and an oil box layer. The drip layer is placed above the oil box layer, and a plurality of drip channels are provided on the bottom surface of the drip layer. The lighter oil in the grease adheres to the drip layer, and the heavier oil in the grease drips into the oil box layer through the drip channels. The bottom surface of the drip layer is parallel to the bottom surface of the oil box layer, and each side surface of the drip layer is parallel to the corresponding side surface of the oil box layer. However, this double-layer oil mesh not only has a high manufacturing cost, complicated installation and disassembly processes, but also is not easy to clean. Therefore, how to improve the performance of the oil mesh in filtering cooking fumes and absorbing grease, and at the same time make the oil mesh easy to clean is a technical problem that needs to be solved urgently.

[0005] In view of this, the present invention is specifically proposed. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an oil mesh structure to achieve the purpose of improving the performance of the oil mesh in filtering cooking fumes and absorbing grease, and making the oil mesh easy to clean.

[0007] To solve the above technical problem, the basic concept of the technical solution adopted by the present invention is:

[0008] An oil mesh structure includes a diversion plate, and a plurality of air inlet holes are arranged side by side from left to right on the diversion plate. Above the air inlet holes, a first oil guide groove with an upward opening is provided, and second oil guide grooves with upward openings are respectively provided on the left and right sides of the air inlet holes. The first oil guide groove and the second oil guide grooves are arranged in a staggered manner.

[0009] Furthermore, the air inlet hole is a long strip-shaped opening horizontally extending along the front-rear direction of the deflector, and both the first oil guiding groove and the second oil guiding groove are strip-shaped grooves with upward openings and side walls on both left and right sides.

[0010] Furthermore, there is a spaced space in the vertical direction between the upper end of the side wall of the second oil guiding groove and the groove bottom wall of the adjacent first oil guiding groove or a spaced space in the horizontal direction between the side wall of the second oil guiding groove and the side wall of the adjacent first oil guiding groove.

[0011] Furthermore, the first oil guiding groove horizontally extends along the front-rear direction above the air inlet hole, the second oil guiding groove horizontally extends along the front-rear direction on both left and right sides of the air inlet hole, and the front and rear end parts of the first oil guiding groove and the second oil guiding groove are integrally connected to the deflector respectively.

[0012] Furthermore, a first guiding part in the front-rear direction is provided above the air inlet hole. The first guiding part is a strip-shaped flat plate, and first flanging parts extending outward from the first guiding part are provided at the left and right side edges of the first guiding part. The first flanging parts are inclined upward, and the first flanging parts on both left and right sides of the first guiding part and the first guiding part enclose the first oil guiding groove. The first oil guiding groove is a strip-shaped groove with an upward opening and a wider upper part and a narrower lower part.

[0013] Furthermore, a second flanging part extending upward from the front edge of the air inlet hole is provided on the deflector, and the upward extending end of the second flanging part is integrally connected to the front end of the first oil guiding groove.

[0014] Furthermore, a third flanging part extending upward from the rear edge of the air inlet hole is provided on the deflector, and the extending end of the third flanging part inclines toward the air inlet hole and is integrally connected to the rear end of the first guiding groove.

[0015] Furthermore, the air inlet hole horizontally extends along the front-rear direction of the deflector, and oil guiding walls extending outward from the left and right side edges of the air inlet hole are provided on the deflector. The oil guiding walls are flanging parts inclined upward, and there is a spaced space in the vertical direction between the upper end of the oil guiding wall and the groove bottom wall of the adjacent first oil guiding groove or a spaced space in the horizontal direction between the oil guiding wall and the side wall of the adjacent first oil guiding groove.

[0016] Furthermore, the deflector between adjacent air inlet holes is a second guiding part. The second guiding part is in the shape of a strip-shaped flat plate, and oil guiding walls extending outward from the second guiding part are provided at the left and right side edges of the second guiding part. The oil guiding walls are flanging parts inclined upward, and the oil guiding walls on both left and right sides of the second guiding part are integrally connected through the second guiding part to enclose the second oil guiding groove. The second oil guiding groove is a strip-shaped groove with a wider upper part and a narrower lower part and an upward opening.

[0017] The present invention also provides an oil fume machine having the oil mesh structure. The front end of the deflector is inclined upward and installed on the oil fume machine, and the front end of the oil mesh structure is inclined upward and installed on the oil fume machine. The included angle formed by the deflector and the horizontal direction is γ, and the included angle formed by the groove bottom wall of the first oil guiding groove and the deflector is δ, where δ < γ < 90°, and γ + δ < 90°.

[0018] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0019] Through the above oil screen structure, especially the first oil guide groove and the second oil guide groove are arranged in an intersecting manner to form a similar double-layer oil screen structure, which is easier to clean, has a lower cost, and is convenient for installation and disassembly compared with the traditional double-layer oil screen structure; and both the first oil guide groove and the second oil guide groove are strip-shaped grooves that are wider at the top and narrower at the bottom and open upward, increasing the contact area between the fume and the oil screen, which is beneficial for the fume to condense into oil droplets and flow into the oil collecting box through the first oil guide groove and the second oil guide groove; there is a spaced space between the upper ends of the left and right side walls of the second oil guide groove and the side wall of the adjacent first oil guide groove, which has a relatively large area for the fume to pass through, improving the fume exhaust efficiency of the range hood. The present invention also introduces a range hood applying the above oil screen structure.

[0020] The following further describes in detail the specific embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, as a part of the present invention, 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 to 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:

[0022] Figure 1 is an installation schematic diagram of an oil screen structure in Embodiment 1 of the present invention;

[0023] Figure 2 is Figure 1 a partial enlarged view of A in

[0024] Figure 3 is a top view of an oil screen structure in Embodiment 2 of the present invention;

[0025] Figure 4 is Figure 3 a partial enlarged view of B in

[0026] Figure 5 is Figure 3 a cross-sectional view taken along the C-C direction in

[0027] Figure 6 is Figure 5 a partial enlarged view of D in

[0028] Figure 7 is a top view of an oil screen structure in Embodiment 2 of the present invention;

[0029] Figure 8Yes Figure 7 Partial enlarged view at position E in the figure.

[0030] In the figure: 100, deflector; 1, first oil guiding groove; 11, first hem; 111, first bending part; 112, second bending part; 12, first oil guiding part; 13, second hem; 14, third hem; 2, second oil guiding groove; 21, oil guiding wall; 22, second oil guiding part; 3, air inlet hole; 4, oil collecting tank; 5, oil leakage hole; 6, positioning convex.

[0031] Embodiment 1

[0032] As Figures 1 to 6 shown, an oil screen structure described in this embodiment includes a deflector 100. A plurality of air inlet holes 3 are provided on the deflector 100 from left to right. A first oil guiding groove 1 is provided above the air inlet holes 3. Second oil guiding grooves 2 are respectively provided on the left and right sides of the air inlet holes 3. The first oil guiding groove 1 and the second oil guiding grooves 2 are arranged in a staggered manner. The staggered arrangement of the first oil guiding groove 1 and the second oil guiding grooves 2 forms a structure similar to a double-layer oil screen, which is integrally formed by stamping a single sheet of material. Compared with the traditional double-layer oil screen structure, it not only reduces costs, but most importantly, it is easy to clean, and the installation and disassembly are convenient.

[0033] As Figure 1 and Figure 2 shown, the air inlet holes 3 are long strip-shaped openings extending horizontally in the front-rear direction of the deflector 100. Both the first oil guiding groove 1 and the second oil guiding grooves 2 are strip-shaped grooves with upward openings and side walls on both left and right sides. There is a spaced space between the upper end of the side wall of the second oil guiding groove 2 and the groove bottom wall of the adjacent first oil guiding groove 1 in the vertical direction or a spaced space between the side wall of the second oil guiding groove 2 and the side wall of the adjacent first oil guiding groove 1 in the horizontal direction, that is, there is a relatively large area for oil fume to pass through. The oil fume enters the interior of the range hood through the gap between the first oil guiding groove 1 and the second oil guiding grooves 2, improving the smoke exhaust efficiency of the range hood.

[0034] As Figure 3 and Figure 4 shown, in this embodiment, the first oil guiding groove 1 extends horizontally in the front-rear direction above the air inlet holes 3, and the second oil guiding grooves 2 extend horizontally in the front-rear direction on the left and right sides of the air inlet holes 3. The front and rear end parts of the first oil guiding groove 1 and the second oil guiding grooves 2 are integrally connected to the deflector 100 respectively.

[0035] As Figure 3 and Figure 4As shown in the figure, in this embodiment, a first diversion part 12 in the front-rear direction is provided above the air inlet hole 3. The first diversion part 12 is a strip-shaped flat plate. The left and right side edges of the first diversion part 12 are provided with first flanges 11 extending outward from the first diversion part 12. The extending ends of the first flanges 11 are inclined upward. The first flanges 11 on the left and right sides of the first diversion part 12 and the first diversion part 12 enclose a first oil guide groove 1. The first oil guide groove 1 is a strip-shaped groove with an upward opening and a wider upper part and a narrower lower part, which can significantly increase the number of collisions between the oil fume and the outer side surface of the first oil guide groove 1, that is, the ventilation side surface, thereby promoting the condensation of oil into oil droplets and improving the filtering performance of the oil mesh structure.

[0036] Preferably, the first diversion part 12 is a trapezoidal flat plate with a gradually increasing width from the front end to the rear end. The oil droplets formed after the condensation of the oil in the oil fume move downward along the first flange 11 and enter the bottom of the groove of the first oil guide groove 1. The bottom of the groove of the first oil guide groove 1 is narrower at the front and wider at the rear, which is beneficial to the rapid flow of the oil droplets from the front end to the rear end of the first oil guide groove 1.

[0037] As Figure 3 and Figure 4 As shown in the figure, in this embodiment, notches are provided at both the front end and the rear end of the first oil guide groove 1, and the first oil guide groove 1 is a groove that penetrates from the front to the rear. Preferably, the first diversion part 12 of the first oil guide groove 1 extends gradually upward from the rear end to the front end, so that the oil droplets formed after the condensation of the oil, under the action of gravity, flow rapidly downward from the front end to the rear end of the groove of the first oil guide groove 1. At the same time, the spacing space between the upper end of the side wall of the second oil guide groove 2 and the bottom wall of the groove of the adjacent first oil guide groove 1 gradually increases from the rear end to the front end, avoiding the escape of oil fume during the rising process.

[0038] As Figure 3 and Figure 4 As shown in the figure, in this embodiment, the first flange 12 is a strip-shaped flange. Preferably, the first flange 12 is a trapezoidal flange with a gradually decreasing width from the front end to the rear end, that is, the first flange 12 is a flange with a wider front and a narrower rear. The ventilation side surface of the first oil guide groove 1 gradually increases from the rear end to the front end. During the rising process of the oil fume, the probability of collision between the oil fume and the ventilation side surface is increased, so that the oil fume is quickly condensed into oil droplets and the escape of oil fume is reduced.

[0039] As Figure 3 and Figure 4As shown in the figure, in this embodiment, a second folded edge 13 extending upward from the front edge of the air inlet hole 3 is provided on the deflector 100, and the upward extending end of the second folded edge 13 is integrally connected to the front end of the first oil guide groove 1; a third folded edge 14 extending upward from the rear edge of the air inlet hole 3 is provided on the deflector 100, and the extending end of the third folded edge 14 inclines towards the air inlet hole 3 and is integrally connected to the rear end of the first oil guide groove 1. The oil droplets formed after the oil fume condenses flow from the front end to the rear end of the first oil guide groove 1 and flow into the outward extending oil collecting groove 4 provided on the outer peripheral edge of the lower side surface of the deflector 100 through the third folded edge 14 integrally connected to the rear end of the first oil guide groove 1. The upward inclination of the extending end of the third folded edge 14 is beneficial to the uniform movement of the oil droplets and avoids splashing.

[0040] As Figure 3 and Figure 4 shown in the figure, in this embodiment, the deflector 100 is a rectangular flat plate arranged in the horizontal direction, the air inlet hole 3 extends horizontally along the front-rear direction of the deflector 100, and oil guide walls 21 extending outward from the left and right side edges of the air inlet hole 3 are provided on the deflector 100. The oil guide walls 21 are folded edges inclined upward, and there is a spaced space in the vertical direction between the upper ends of the oil guide walls 21 and the groove bottom wall of the adjacent first oil guide groove 1 or a spaced space in the horizontal direction between the upper ends of the oil guide walls 21 and the side wall of the first oil guide groove 1, so that during the upward movement of the oil fume, after colliding with the ventilation side surface, it continues to rise and enters the interior of the range hood.

[0041] As Figure 3 and Figure 4 shown in the figure, in this embodiment, the deflector 100 between adjacent air inlet holes 3 is a second diversion part 22. The second diversion part 22 is in the shape of a strip-shaped flat plate. The oil guide walls 21 between adjacent air inlet holes 3 are integrally connected through the second diversion part 22 to form a second oil guide groove 2. The second oil guide groove 2 is a strip-shaped groove that is wider at the top and narrower at the bottom and has an upward opening, which can significantly increase the number of collisions between the oil fume and the outer side surface of the second oil guide groove 1, that is, the ventilation side surface, and then promote the condensation of the oil to form oil droplets and improve the filtering performance of the oil net structure.

[0042] As Figure 3 and Figure 4 shown in the figure, in this embodiment, notches are provided at both the front end and the rear end of the second oil guide groove 2, and the second oil guide groove 2 forms a groove that is open upward and penetrates through the front and rear ends. When the oil fume passes through the air inlet hole 3, the oil fume will collide with the side surface of the oil guide wall 21 multiple times, which helps the oil to condense on the side surface of the oil guide wall 21 and then flow into the oil collecting groove 4 along the groove bottom of the second oil guide groove 2.

[0043] As Figure 5 and Figure 6As shown in the figure, in this embodiment, an oil collecting groove 4 extending outward is provided at the outer peripheral edge of the lower side surface of the deflector 100. The outer peripheral edge of the oil collecting groove 4 is bent upward to form a curled edge. A plurality of oil leakage holes 5 are provided at the bottom of the oil collecting groove 4. A positioning convex 6 protruding downward in part is provided on the outer periphery of the oil collecting groove 4. The deflector 100 is fixed to the oil box through the positioning convex 6. The oil leakage holes 5 are communicated with the oil box and are arranged above the oil box (not shown in the figure).

[0044] Specifically, the first oil guiding groove 1 and the second oil guiding groove 2 are arranged in a staggered manner to form a structure similar to a double-layer oil net. During the upward movement of the oil fume, it moves towards the air inlet hole 3, collides with the side surfaces of the oil guiding walls 21 on the left and right sides of the air inlet hole 3. During the upward movement of the preliminarily filtered oil fume, it further collides with the outer side surface of the first oil guiding groove 1, realizing further filtration of the oil fume. After multiple filtrations through the structure similar to a double-layer oil net, it helps the grease to condense into oil droplets and drip into the first oil guiding groove 1 and the second oil guiding groove 2, and then flow into the oil collecting groove 4 along the bottom of the grooves of the first oil groove 1 and the second oil groove 2. Moreover, the multiple collisions of the oil fume with the oil net can disperse the oil fume airflow, improving the rectification effect of the oil fume passing through the oil net.

[0045] Through the oil net structure of the above-mentioned range hood, the first oil guiding groove 1 and the second oil guiding groove 2 are arranged up and down to form a structure similar to a double-layer oil net, which is integrally formed by stamping a single piece of sheet metal. It is easier to clean, has a lower cost, and is convenient for installation and disassembly compared with the traditional double-layer oil net structure; both the first oil guiding groove 1 and the second oil guiding groove 2 are grooves that are wider at the top and narrower at the bottom and open upward, increasing the contact area between the oil fume and the ventilation surface. Then, when the oil fume passes through the side surface of the ventilation surface, multiple collisions will occur, not only dispersing the oil fume airflow and improving the rectification effect, but also being conducive to the oil fume condensing into oil droplets and flowing into the oil collecting box 6 through the first oil guiding groove 1 and the second oil guiding groove 2.

[0046] Embodiment Two

[0047] As Figure 7 and Figure 8 shown, the difference between this embodiment and the above-mentioned Embodiment One is:

[0048] As Figure 7 and Figure 8As shown in the figure, in this embodiment, the first hem 11 includes a first bending portion 111 and a second bending portion 112. The first hem 11 extends outward from the first diversion portion 12 to form the first bending portion 111. The first bending portion 111 continues to extend outward from the first diversion portion 12 to form the second bending portion 112. The upward inclination of the second bending portion 112 is greater than that of the first bending portion 111. The first oil guide groove 1 is a strip-shaped groove with an upward opening, wider at the top and narrower at the bottom and protruding in the middle. This not only increases the chance of the oil fume colliding with the outer side surface of the first oil guide groove 1, that is, the ventilation side surface, but also under the action of gravity, it is more conducive to the oil droplets formed by the condensation of the grease to move from the second bending portion 112 to the first bending portion 111 and then flow into the bottom of the groove of the first oil guide groove 1, improving the sewage discharge effect of the oil mesh structure.

[0049] Preferably, the second bending portion 112 has a gradually increasing width from the rear end to the front end. During the upward movement of the oil fume, the oil fume above the range hood is prone to escape. The width of the front end of the second bending portion 112 is greater than that of the rear end, increasing the contact area between the oil fume and the outer side surface of the first oil guide groove 1, not only strengthening the rectification effect of the oil fume, but also being more conducive to the condensation of the oil fume.

[0050] Through the above oil mesh structure of the range hood, not only is the chance of the oil fume colliding with the ventilation side surface further increased, the oil fume airflow is dispersed, and the rectification effect of the oil fume passing through the filter screen is improved, but also the upward inclination of the second bending portion 112 is greater than that of the first bending portion 111. Under the action of gravity, it is conducive to the oil droplets flowing towards the bottom of the groove of the first oil guide groove 1 and then entering the oil collecting box 6, keeping the range hood relatively clean.

[0051] Embodiment Three

[0052] In the embodiment of the present invention, a range hood having the oil mesh structure described in any of the above embodiments is further provided, including a machine case and a smoke collecting hood. The machine case is arranged above the smoke collecting hood. The smoke collecting hood is arranged at the bottom of the machine case and defines a smoke collecting cavity with the machine case. The front end of the deflector 100 is inclined upward and installed at the bottom of the smoke collecting hood, so that the oil droplets condensed on the front or rear end surface of the oil mesh structure can flow downward along the inclined first oil guide groove 1 and the second oil guide groove 2 and flow into the oil collecting groove 4, and further flow into the oil box through the oil leakage holes 5 on the oil collecting groove 4 (not shown in the figure).

[0053] As shown in FIGS. 1 and Figure 2 As shown in the figure, in this embodiment, the oil mesh structure includes a deflector 100. The deflector 100 is a rectangular flat plate. The outer peripheral wall of the deflector 100 is attached to the inner peripheral wall of the smoke collecting hood 2. The whole oil mesh structure is gradually inclined upward from the horizontal direction. The angle formed by the deflector 100 and the horizontal direction is γ, and the angle formed by the bottom of the groove of the first oil guide groove 1 and the deflector 100 is δ, where δ < γ < 90°, and γ + δ < 90°.

[0054] As shown in FIGS. 1 andFigure 2 As shown in the figure, in this embodiment, the first oil guide groove 1 is a strip-shaped groove with an upward opening and side walls on both left and right sides, horizontally extending in the front-rear direction above the air inlet hole 3. The front and rear end parts of the first oil guide groove 1 are integrally connected to the deflector 100 respectively. During the upward movement of the oil fume, it collides with the outer side surface of the first oil guide groove 1 multiple times, improving the rectification effect of the oil fume passing through the oil mesh structure. Moreover, the oil droplets formed after the condensation of the oil fume flow into the oil collecting groove 6 through the first oil guide groove 1.

[0055] As shown in Fig. 1 and Figure 2 As shown in the figure, in this embodiment, the deflector 100 is provided with oil guide walls 21 extending from the left and right side edges of the air inlet hole 3 to the outside of the air inlet hole 3. The extending ends of the oil guide walls 21 are inclined upward. The deflector 100 between adjacent air inlet holes 3 is the second deflector part 22. The second deflector part 22 is in the shape of a strip-shaped flat plate. The oil guide walls 21 between adjacent air inlet holes 3 are integrally connected through the second deflector part 22 to enclose the second oil guide groove 2. The second oil guide groove 2 is a strip-shaped groove with a wider upper part and a narrower lower part and an upward opening. There is a spaced space between the upper ends of the oil guide walls 21 and the side walls of the adjacent first oil guide groove 1, so that during the upward movement of the oil fume, after colliding with the ventilation side surface, it continues to rise and enter the interior of the range hood. Moreover, the oil droplets formed after the condensation of the oil fume flow into the oil collecting groove 6 through the second oil guide groove 2.

[0056] Through the above range hood with the above oil mesh structure, the oil mesh structure is formed by integral stamping of a single sheet of plate. The first oil guide groove 1 and the second oil guide groove 2 form a double-layer oil mesh structure arranged in an intersecting manner, which not only improves the rectification effect of the oil fume passing through the oil mesh structure, is more conducive to the condensation of grease into oil droplets, and improves the smoke exhaust efficiency. At the same time, it is easier to clean, has a lower cost, and is convenient for installation and disassembly compared with the traditional double-layer oil mesh structure.

[0057] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation 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 by 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. An oil screen structure, comprising a flow guide plate, characterized in that: A plurality of air inlet holes are arranged in parallel from left to right on the deflector. Above the air inlet holes, a first oil guide groove with an upward opening is provided. On the left and right sides of the air inlet holes respectively, second oil guide grooves with upward openings are provided. The first oil guide groove and the second oil guide grooves are arranged in a staggered manner. The air inlet holes are long strip-shaped openings extending horizontally in the front-rear direction of the deflector. The first oil guide groove extends horizontally in the front-rear direction above the air inlet holes, and the second oil guide grooves extend horizontally in the front-rear direction on the left and right sides of the air inlet holes. The upper end of the side wall of the second oil guide groove has a spaced space in the vertical direction from the groove bottom wall of the adjacent first oil guide groove or has a spaced space in the horizontal direction from the side wall of the adjacent first oil guide groove. Above the air inlet holes, a first flow guiding portion in the front-rear direction is provided. The first flow guiding portion is a trapezoidal flat plate with a gradually increasing width from the front end to the rear end. The first flow guiding portion extends gradually upwardly and obliquely from the rear end to the front end. On the left and right side edges of the first flow guiding portion, first folded edges extending outwardly from the first flow guiding portion are provided. The extending ends of the first folded edges are inclined upwardly. The first folded edges on the left and right sides of the first flow guiding portion and the first flow guiding portion enclose the first oil guide groove. The first folded edge extends outwardly from the first flow guiding portion to form a first bent portion, the first bent portion extends outwardly from the first flow guiding portion to form a second bent portion, and the upward inclination of the second bent portion is greater than that of the first bent portion.

2. The oil screen structure according to claim 1, characterized in that: The air inlet holes are long strip-shaped openings extending horizontally in the front-rear direction of the deflector.

3. The oil screen structure according to claim 2, characterized in that: The front and rear end portions of the first oil guide groove and the second oil guide grooves are integrally connected to the deflector respectively.

4. A grease screen structure according to any one of claims 1 to 3, characterized in that: On the deflector, a second folded edge extending upwardly from the front edge of the air inlet hole is provided. The upward extending end of the second folded edge is integrally connected to the front end of the first oil guide groove.

5. The oil screen structure according to claim 4, wherein: On the deflector, a third folded edge extending upwardly from the rear edge of the air inlet hole is provided. The extending end of the third folded edge is inclined toward the air inlet hole and is integrally connected to the rear end of the first flow guiding groove.

6. A kind of oil screen structure according to any one of claims 1 to 3, characterized in that: The air inlet holes extend horizontally in the front-rear direction of the deflector. On the deflector, oil guide walls extending outwardly from the left and right side edges of the air inlet holes to the outside of the air inlet holes are provided. The oil guide walls are folded edges inclined upwardly. The upper end of the oil guide wall has a spaced space in the vertical direction from the groove bottom wall of the adjacent first oil guide groove or has a spaced space in the horizontal direction from the side wall of the adjacent first oil guide groove.

7. The oil screen structure according to claim 6, characterized in that: The deflector between adjacent air inlet holes is a second flow guiding portion. The second flow guiding portion is in the shape of a strip-shaped flat plate. On the left and right side edges of the second flow guiding portion, oil guide walls extending outwardly from the second flow guiding portion are provided. The oil guide walls are folded edges inclined upwardly. The oil guide walls on the left and right sides of the second flow guiding portion are integrally connected through the second flow guiding portion to enclose a second oil guide groove. The second oil guide groove is a strip-shaped groove with a wider upper part and a narrower lower part and an upward opening.

8. An oil fume machine, characterized in that: Installing the oil screen structure according to any one of claims 1 to 7 above, the front end of the deflector is installed on the range hood in an upwardly inclined manner. The angle formed by the deflector and the horizontal direction is γ, and the angle formed by the groove bottom wall of the first oil guide groove and the deflector is δ, where δ < γ < 90°, and γ + δ < 90°.

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