Oil net structure and range hood

Abstract

The present invention discloses an oil net structure, including a guide plate, on which an oil filter net portion is provided that protrudes from the left and right sides toward the middle direction and upward, and the oil filter net portion is provided with a plurality of air inlet holes spaced from front to back, and the air inlet holes are in the shape of long strips and extend radially along the left and right directions of the oil filter net portion. The present invention evenly moves the negative pressure area in the middle of the smoke collecting chamber to both sides of the range hood by providing the oil filter net portions that protrude from the left and right sides toward the middle direction and upward on the guide plate, especially by providing the oil filter net portions on the left and right sides of the guide plate and protruding from the inside of the smoke collecting hood. This achieves good smoke collection and suction effects when absorbing oil smoke, prevents oil smoke from escaping from both sides of the range hood, and improves the smoke collection performance of the smoke collecting chamber, thereby enhancing user experience. The present invention also introduces a range hood using the above-mentioned oil net structure.

Description

Technical Field

[0001] The present invention belongs to the technical field of kitchen appliances, and in particular relates to an oil net structure and a range hood. Background Art

[0002] In the preparation process of traditional Chinese meals, frying, stir-frying, cooking and deep-frying account for a large proportion, and a large amount of oil smoke is also produced, which not only pollutes the kitchen environment but also affects human health. Therefore, range hoods have become one of the indispensable kitchen appliances in modern families.

[0003] Currently, most households use dual stoves with two burners, one on the left and one on the right. The pots and pans are located on either side of the range hood's smoke collection chamber. However, typical range hoods have a single central air inlet, and the negative pressure zone around the smoke collection chamber is larger in the center and smaller on the sides. When cooking, the sudden increase in oil smoke easily escapes the negative pressure zone of the range hood, causing it to escape. There are two common technical approaches to reducing oil smoke escape: increasing the range hood's air volume and pressure, or improving the smoke collection performance of the smoke collection chamber.

[0004] Chinese patent application number 201710923594.7 discloses a range hood, whose fan system includes a first three-element fan and a second three-element fan arranged in series. The two three-element fans have a compact fan structure, high fan efficiency and wind pressure, and a large negative pressure gradient generated, which can greatly improve the smoke extraction efficiency. However, setting two fans in the same range hood not only increases the production cost, but also when the two fans are working at the same time, the air between the two fans will flow to the two fans at the same time, causing the air flow between the two fans to be turbulent, which increases the noise of the range hood to a certain extent. Therefore, increasing the negative pressure area on both sides of the range hood and improving the smoke collection performance of the smoke collecting chamber has become the preferred technical route to reduce the escape of oil smoke.

[0005] In view of this, the present invention is 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 net structure installed on the range hood to achieve uniform movement of the negative pressure area in the middle of the smoke collecting chamber to both sides of the range hood, thereby improving the smoke collection performance of the smoke collecting chamber.

[0007] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0008] An oil net structure includes a guide plate, wherein the guide plate is provided with an oil filter net portion protruding upward from the left and right sides toward the middle direction, and the oil filter net portion is provided with a plurality of air inlet holes arranged at intervals from front to back.

[0009] Furthermore, the air inlet hole is in the shape of an elongated strip and extends radially in the left-right direction of the oil filter.

[0010] Furthermore, the guide plate is provided with an oil retaining wall which surrounds the edge of the air inlet and extends upward, and the end of the oil retaining wall is provided with a curling edge which bends toward the outer peripheral side of the air inlet.

[0011] Furthermore, it includes an inner guide plate and an outer guide plate stacked up and down, with a separation space between the inner guide plate and the outer guide plate, and the inner oil filter mesh portion arranged on the inner guide plate and the outer oil filter mesh portion arranged on the outer guide plate are arranged relatively to each other up and down; a plurality of upper air inlet holes are arranged on the inner oil filter mesh portion, and a plurality of lower air inlet holes are arranged on the outer oil filter mesh portion, and the upper air inlet holes and the lower air inlet holes are staggered and connected through the separation space.

[0012] Furthermore, the inner and outer oil filter mesh parts are of the same shape with lower sides and higher middle, and each upper air inlet hole is located above the spacing between adjacent lower air inlet holes; preferably, part of the upper air inlet hole is arranged to overlap with the lower air inlet hole.

[0013] Furthermore, an oil filter mesh is provided on the left and right sides of the guide plate respectively, and the guide plate between the two oil filter meshes is the main key part. The oil filter mesh is integrated with the main key part, or the oil filter mesh is detachably installed on the main key part.

[0014] Furthermore, the main key portion is in the shape of an arc with lower left and right sides, higher middle and bulging upward; preferably, the main key portion of the inner layer guide plate is in the shape of an arc with lower left and right sides, higher middle and bulging upward, and the main key portion of the outer layer guide plate is in the shape of a flat plate.

[0015] Furthermore, the outer periphery of the outer guide plate is provided with a circle of downwardly concave annular oil guide grooves.

[0016] The present invention further provides a range hood comprising a smoke collecting hood, wherein the oil net structure is installed below the smoke collecting hood, and the oil filter net portion arranged on the guide plate protrudes upward from the interior of the smoke collecting hood.

[0017] Furthermore, the front side of the guide plate of the oil net structure is installed on the smoke hood with an upward tilt, and an oil box is installed on the rear side of the smoke hood; a plurality of oil leakage holes are provided at the bottom of the oil guide groove arranged on the periphery of the guide plate, and the oil leakage holes are connected to the oil box.

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

[0019] The present invention adopts the above-mentioned oil net structure, including arranging oil filter net parts on the left and right sides of the guide plate, which protrude toward the middle direction and upward, especially the left and right sides of the guide plate are respectively provided with oil filter net parts protruding inside the smoke collecting hood, and the negative pressure area in the middle of the smoke collecting chamber is evenly moved to both sides of the range hood, thereby increasing the negative pressure area on both sides, and having good smoke collection and suction effects when absorbing oil smoke, which can reduce the amount of oil smoke escaping, thereby improving the smoke collection performance of the smoke collecting chamber; the upper air inlet and the lower air inlet are staggered, especially the upper air inlet part overlaps with the lower air inlet. The stacked setting avoids oil dripping or leakage, and improves user experience; after the oil smoke is filtered, the oil droplets form and flow along the oil filter mesh part to the outer peripheral edge of the guide plate and the main key part between the two oil filter mesh parts. Because the front side of the guide plate is installed on the smoke hood with an upward tilt, under the action of gravity, the oil droplets are longitudinally introduced into the oil guide groove and then flow into the oil box through the oil leakage hole, keeping the range hood clean, especially the main key part of the inner guide plate is an arc shape with low sides and high middle and convex upward, which further strengthens the negative pressure area on the left and right sides of the range hood.

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

[0021] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are only some embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive effort. In the accompanying drawings:

[0022] Figure 1 Schematic diagram of a range hood according to an embodiment of the present invention

[0023] Figure 2 is a schematic diagram of an oil net structure according to an embodiment of the present invention;

[0024] Figure 3 This is an exploded view of an oil reticulate structure according to an embodiment of the present invention;

[0025] Figure 4 This is a partial enlarged view of an oil net structure in an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of an oil net structure in a second embodiment of the present invention;

[0027] Figure 6 It is an exploded view of an oil net structure in the second embodiment of the present invention.

[0028] In the figure: 1. Chassis; 2. Fume hood; 3. Oil filter; 4. Air inlet; 5. Oil baffle; 6. Guide plate; 7. Main key; 8. Oil guide groove; 9. Oil leakage hole; 10. Oil box; 31. Outer oil filter; 32. Inner oil filter; 41. Lower air inlet; 42. Upper air inlet; 51, 52, oil baffle; 61, Outer guide plate; 62, Inner guide plate; 71, 72, Main key.

[0029] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the 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 terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0032] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0033] like Figures 1 to 6 As shown, an embodiment of the present invention introduces an oil net structure, including a guide plate 6, which is installed at an upward tilt at the bottom of the smoke hood 2. The chassis 1 is arranged above the smoke hood 2. The smoke hood 2 is arranged at the bottom of the chassis 1 and defines a smoke collection chamber between the chassis 1. The guide plate 6 is provided with an oil filter 3 that protrudes upward from the left and right sides toward the middle. The oil filter 3 has a plurality of air inlet holes 4 arranged at intervals from front to back. The air inlet holes 4 are long and extend radially in the left and right directions of the oil filter 3. The oil filter 3 is low at the left and right ends and high in the middle, protruding from the inside of the smoke hood 2, effectively increasing the smoke collection area and achieving a high smoke collection and extraction effect when absorbing oil smoke.

[0034] like Figure 1 and Figure 2 As shown, in this embodiment, oil filters 3 are provided on the left and right sides of the guide plate 6. The guide plate 6 between the two oil filters 3 serves as a main key portion 7. The oil filters 3 and the main key portion 7 are integrally provided, or the oil filters 3 are detachably mounted on the main key portion 7. Preferably, the two oil filters 3 are integrally connected via the main key portion 7. The main key portion 7 evenly shifts the negative pressure area in the center of the smoke collection chamber to both sides of the range hood, guiding the oil smoke into the smoke collection chamber through the air inlet 4, preventing the oil smoke from escaping from the left and right sides of the range hood, thereby improving the smoke collection performance of the smoke collection chamber.

[0035] like Figure 1 As shown, in this embodiment, the main key portion 7 is arranged directly below the smoke collecting chamber, the upper side surface of the main key portion 7 is placed in the smoke collecting chamber, and the oil filter mesh portions 3 on the left and right sides of the main key portion 7 protrude upward from the left and right sides toward the middle direction; the highest middle point of the oil filter mesh portion 3 is arranged close to the main key portion 7, so that the slope of the oil filter mesh portion 3 close to the main key portion 7 is greater than the slope close to the outer periphery of the guide plate 6, because the negative pressure area in the smoke collecting chamber has the characteristics of being large in the middle and small on both sides, that is, the negative pressure area in the middle of the smoke collecting chamber is significantly larger than the negative pressure areas on the left and right sides of the smoke collecting chamber, and the highest middle point of the oil filter mesh portion 3 is arranged close to the main key portion 7, which is conducive to the oil smoke on both sides of the range hood flowing to the core negative pressure area of the smoke collecting chamber.

[0036] like Figure 3 and Figure 4 As shown, in this embodiment, a circle of upwardly extending oil-blocking wall 5 is provided on the edge of the air inlet 4, and a curling edge is provided on the end of the oil-blocking wall 5 which bends toward the outer peripheral side of the air inlet 4. The oil droplets formed after the oil smoke is filtered by the oil filter mesh portion 3 flow laterally along the surface of the oil-blocking wall 5 toward the left and right ends of the oil filter mesh portion 3. At the same time, part of the oil droplets flow laterally along the surface of the oil-blocking wall 5 toward the main key portion 7. Therefore, the main key portion 7 has the dual function of guiding the flow of the oil smoke and the oil droplets formed after the oil smoke is filtered.

[0037] Through the above-mentioned oil net structure, including the oil filter net parts 3 protruding toward the middle and upward on the left and right sides of the guide plate 6, especially the oil filter net parts 3 protruding from the inside of the smoke collecting hood 2 are respectively provided on the left and right sides of the guide plate 6. The negative pressure area in the middle of the smoke collecting chamber is evenly moved to both sides of the range hood, thereby increasing the negative pressure area on both sides. When absorbing oil smoke, the smoke collection and smoking effects are good, and the amount of oil smoke escaping can be reduced, thereby improving the smoke collection performance of the smoke collecting chamber.

[0038] Example 1

[0039] like Figure 3 and Figure 4As shown, in this embodiment, the oil screen structure includes an outer guide plate 61 and an inner guide plate 62 stacked one above the other, with a space between them. The inner oil filter 32 on the inner guide plate 62 and the outer oil filter 31 on the outer guide plate 61 are arranged vertically opposite each other. The inner oil filter 32 is provided with a plurality of upper air inlet holes 42, while the outer oil filter 31 is provided with a plurality of lower air inlet holes 41. The upper air inlet holes 42 and the lower air inlet holes 41 are arranged in an interlaced manner and connected by the space. A certain height difference exists between the inner guide plate 62 and the outer guide plate 61, leaving a gap between them and forming a space. The upper air inlet holes 42 and the lower air inlet holes 41 are arranged in an interlaced manner. Below the upper air inlet holes 42 is the space between adjacent lower air inlet holes 41 of the outer oil filter mesh portion 31, and above the lower air inlet holes 41 is the space between adjacent upper air inlet holes 42 of the inner oil filter mesh portion 32. This ensures that oil droplets in the fume hood 2 cannot directly fall vertically downward through the upper air inlet holes 42 and the lower air inlet holes 41. The upper air inlet holes 42 and the lower air inlet holes 41 are connected by the space, allowing the oil smoke below to flow into the smoke collection chamber through the upper air inlet holes 42, the space, and the lower air inlet holes 41 in sequence, thus ensuring the extraction and collection of oil smoke.

[0040] like Figure 4 As shown, in this embodiment, a circle of upwardly extending oil baffles 51, 52 is provided on the edges of the upper air inlet hole 42 and the lower air inlet hole 41, and the ends of the oil baffles 51, 52 are provided with curling edges bent toward the outer periphery of the upper air inlet hole 42 and the lower air inlet hole 41 respectively. The inner oil filter mesh portion 32 and the outer oil filter mesh portion 31 are both of the same shape with the left and right sides being low and the middle being high. Each upper air inlet hole 42 is located above the spacing portion between adjacent lower air inlet holes 41, and part of the upper air inlet hole 42 is arranged to overlap with the lower air inlet hole 41 to prevent oil droplets formed after the oil smoke condenses through the outer oil filter mesh portion 31 and the inner oil filter mesh portion 32 from falling out from the openings of the lower air inlet hole 41 and the upper air inlet hole 42, affecting the user experience.

[0041] like Figure 3 As shown, in this embodiment, the outer guide plate 61 and the inner guide plate 62 are both rectangular flat plates. The outer oil filter 31 is provided on either side of the outer guide plate 61. A key portion 71 forms the outer guide plate 61 between the two outer oil filter 31s, integrally connecting the two outer oil filter 31s via the key portion 71. The inner guide plate 62 is also provided on either side of the inner guide plate 62. A key portion 72 forms the inner oil filter 32 between the two inner oil filter 32s, integrally connecting the two inner oil filter 32s via the key portion 72. The key portions 71 and 72 of the outer guide plate 61 and the inner guide plate 62 are both flat plates and serve to guide the oil smoke into the smoke collection chamber. At the same time, the negative pressure zone in the center of the smoke collection chamber is evenly distributed to the left and right sides of the range hood.

[0042] like Figure 3 As shown, in this embodiment, the outer periphery of the outer guide plate 61 is provided with a circle of downwardly concave annular oil guide groove 8, and the bottom of the groove of the annular oil guide groove 8 is provided with a plurality of penetrating oil leakage holes 9, and the inner guide plate 62 is stacked and installed on the outer guide plate 61, and the outer peripheral edge of the inner guide plate 62 is located outside the inner periphery of the annular oil guide groove 8 or between the inner periphery and the outer periphery. The outer guide plate 61 and the inner guide plate 62 are installed as a whole at the bottom of the smoke hood 2 with an upward tilt. Under the action of gravity, the oil smoke condenses to form oil droplets that flow into the oil guide groove 8 along the outer peripheral edges of the inner guide plate 62 and the outer guide plate 61 and their main key parts 71 and 72.

[0043] Through the above-mentioned oil net structure, the upper air inlet hole 42 and the lower air inlet hole 41 are staggered, especially part of the upper air inlet hole 42 is overlapped with the lower air inlet hole 41, and is connected through the interval space, which is not only conducive to the movement of oil smoke into the smoke collecting chamber, but also can avoid the occurrence of oil dripping or leakage, thereby improving the user experience.

[0044] Example 2

[0045] like Figure 5 and Figure 6 As shown, the difference between this embodiment and the above-mentioned embodiment 1 is that: the outer oil filter mesh parts 31 are provided on the left and right sides of the outer guide plate 61, the outer guide plate 61 between the two outer oil filter mesh parts 31 is a main key part 71, the two outer oil filter mesh parts 31 are connected as a whole through the main key part 71, and the main key part 71 of the outer guide plate 61 is flat; the inner oil filter mesh parts 32 are provided on the left and right sides of the inner guide plate 62, the inner guide plate 62 between the two inner oil filter mesh parts 32 is a main key part 72, the two inner oil filter mesh parts 32 are connected as a whole through the main key part 72, the main key part 72 of the inner guide plate 62 is an arc shape with low left and right sides and high in the middle and convex upward, the main key part 72 of the inner guide plate 62 is low on the left and right sides and high in the middle and protrudes inside the smoke hood 2, further strengthening the negative pressure area on the left and right sides of the range hood, thereby reducing the escape of oil smoke on the left and right sides of the range hood, and improving the smoke collection performance of the smoke collection chamber.

[0046] Through the above-mentioned oil net structure, especially the main key part 72 of the inner layer guide plate 62 is in an arc shape with low sides and high middle and convex upward, the negative pressure area on the left and right sides of the range hood is further strengthened, the oil smoke escape on the left and right sides of the range hood is reduced, and the smoke collection performance of the smoke collecting chamber is improved.

[0047] Example 3

[0048] The difference between this embodiment and the first and second embodiments is that the lower air inlet hole 41 of the outer oil filter mesh portion 31 and the upper air inlet hole 42 of the inner oil filter mesh portion 32 are both hourglass-shaped (not shown in the figure) with large openings on both ends and gradually shrinking toward the middle. According to the Venturi effect, "when the air flow changes from coarse to fine, the gas flow rate is accelerated, so that the gas forms a 'vacuum' area on the rear side of the Venturi tube outlet. When this vacuum area approaches the workpiece, it will have a certain adsorption effect on the workpiece." The oil smoke enters the smoke collecting chamber through the lower air inlet hole 41 of the outer oil filter mesh portion 31 and the upper air inlet hole 42 of the inner oil filter mesh portion 32. The change in the flow rate of the oil smoke conforms to the principle of the above-mentioned Venturi effect.

[0049] Through the above oil net structure, the negative pressure area is placed in the center while taking into account the smoke collection area, which speeds up the gas flow speed and further strengthens the adsorption capacity of the center position of the oil filter part 3 for oil smoke.

[0050] Example 4

[0051] like Figures 1 to 6 As shown, an embodiment of the present invention further provides a range hood having the oil net structure described in any of the above embodiments, including a chassis 1 and a smoke hood 2. The chassis 1 is arranged above the smoke hood 2, and the smoke hood 2 is arranged at the bottom of the chassis 1 and defines a smoke collecting chamber between the chassis 1. The front side of the guide plate 6 of the oil net structure is installed on the smoke hood 2 with an upward tilt. The oil filter mesh part 3 arranged on the guide plate 6 protrudes upward from the inside of the smoke hood 2. The oil filter mesh part 3 is low at the left and right ends and high in the middle. When absorbing oil smoke, the smoke gathering and smoking effect is high, which effectively increases the smoke collecting area.

[0052] like Figure 1 As shown, in this embodiment, the front side of the guide plate 6 is installed on the smoke hood 2 at an upward tilt, and the angle between the guide plate 6 and the horizontal plane is α, where 5°≤α≤8°; the left and right sides of the guide plate 6 are respectively provided with oil filter mesh parts 3, and the two oil filter mesh parts 3 are integrally connected via a main key part 7. The oil filter mesh parts 3 are installed on the smoke hood 2 at an angle with the front higher and the back lower, so that the collected oil droplets are collected backward and gathered into the oil guide groove 8; preferably, the oil filter mesh parts 3 are low at the front and back ends and high in the middle, so as to ensure that the oil droplets on the oil filter mesh parts 3 flow to the periphery and will not be retained, so as to avoid falling from the air inlet provided on the oil filter mesh parts 3. In this way, the oil droplets formed after the oil smoke condenses flow laterally along the surface of the oil baffle wall 5 to the outer peripheral edge of the guide plate 6 and its main key part 7, and can quickly flow into the oil guide groove 8 under the action of gravity.

[0053] like Figure 1As shown, an oil box 10 is installed on the rear side of the smoke hood 2, and a plurality of oil leakage holes 9 are provided at the bottom of the oil guide groove 8. The oil leakage holes 9 are connected to the oil box 10. The oil box 10 and the bottom of the oil guide groove 8 are detachably fixed, and the length of the oil box 10 is greater than or equal to the length of the oil guide groove 8. Finally, the oil droplets flow into the oil box 10 through the oil leakage holes 9 at the bottom of the oil guide groove 8, which makes it convenient to clean up the remaining oil droplets in time and keep the range hood clean.

[0054] Specifically, an oil filter mesh portion 3 is provided on the left and right sides of the guide plate 6. The oil filter mesh portion 3 is low at the left and right ends and high in the middle and protrudes from the inside of the smoke hood 2. The two oil filter mesh portions 3 are connected as a whole through the main key portion 7. The negative pressure area of the smoke collecting chamber moves from the middle to the left and right sides. When the range hood starts working, the main key portion 7 guides the oil smoke to move to the oil filter mesh portions 3 on both sides respectively. Furthermore, the outer oil filter mesh portion 31 performs preliminary filtration on the rising oil smoke, and the inner oil filter mesh portion 32 performs preliminary filtration on the rising oil smoke. After further filtration, the condensed oil droplets flow horizontally along the oil baffle 51 of the outer oil filter mesh part 31 and the oil baffle 52 of the inner oil filter mesh part 32 to the outer edges of the outer guide plate 61 and the inner guide plate 62 and their key parts 71 and 72 on both sides. The outer guide plate 61 and the inner guide plate 62 are installed at an upward angle at the bottom of the smoke hood 2. Under the action of gravity, the oil droplets flow into the oil guide groove 8 and then into the oil box 10 through the oil leakage hole 9, keeping the range hood clean. By setting the key part 7 between the oil filter mesh part 3 and the guide plate 6 protruding from the inside of the smoke hood 2, the negative pressure area in the middle of the smoke collection chamber is moved to the left and right sides, reducing the escape of oil smoke on the left and right sides of the range hood; the oil filter mesh part 3 protrudes from the inside of the smoke hood 2 with low ends on the left and right and high in the middle, increasing the smoke collection area and improving the smoke collection performance of the smoke collection chamber.

[0055] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with this patent can make slight changes or modifications to equivalent embodiments using the above technical content without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. An oil net structure, including a guide plate, characterized in that: The deflector is provided with an oil filter portion protruding upward from the left and right sides toward the middle, and the oil filter portion is provided with a plurality of air inlet holes spaced apart from the front to the back; The air inlet is long and extends radially in the left and right directions of the oil filter; the air inlet is hourglass-shaped, with large openings at the left and right ends and gradually narrowing toward the center; an oil filter is provided on each of the left and right sides of the guide plate, and the guide plate between the two oil filter portions serves as a main key portion; the oil filter is integrally provided with the main key portion, or the oil filter is detachably mounted on the main key portion; the main key portion is an arc-shaped portion with lower left and right sides and a higher center portion, convex upwardly; It comprises an inner guide plate and an outer guide plate stacked up and down, with a space between the inner guide plate and the outer guide plate. The main key portion of the inner guide plate is an arc shape with low left and right sides and high in the middle, protruding upwards. The main key portion of the outer guide plate is a flat plate. The highest point in the middle of the oil filter net is arranged close to the main key portion, so that the slope of the oil filter net close to the main key portion is greater than the slope of the side close to the outer circumference of the guide plate.

2. The oil net structure according to claim 1, characterized in that: The guide plate is provided with an oil retaining wall which circles around the edge of the air inlet and extends upward, and the end of the oil retaining wall is provided with a curling edge which bends toward the outer peripheral side of the air inlet.

3. An oil net structure according to any one of claims 1 to 2, characterized in that: The inner oil filter portion arranged on the inner guide plate and the outer oil filter portion arranged on the outer guide plate are arranged opposite to each other up and down; a plurality of upper air inlet holes are arranged on the inner oil filter portion, and a plurality of lower air inlet holes are arranged on the outer oil filter portion. The upper air inlet holes and the lower air inlet holes are arranged in an interlaced manner and are connected through the interval space.

4. The oil net structure according to claim 3, characterized in that: The inner oil filter mesh part and the outer oil filter mesh part are both in the same shape with the left and right sides being low and the middle being high, and each upper air inlet hole is located above the interval between adjacent lower air inlet holes.

5. The oil net structure according to claim 4, characterized in that: The upper air inlet portion is arranged to overlap with the lower air inlet portion.

6. The oil net structure according to claim 3, characterized in that: The outer periphery of the outer guide plate is provided with a circle of downwardly concave annular oil guide grooves.

7. A range hood comprising a fume collecting hood, characterized in that: The oil net structure according to any one of claims 1 to 6 is installed below the smoke hood, and the oil filter net portion arranged on the guide plate protrudes upward from the inside of the smoke hood.

8. The range hood according to claim 7, characterized in that: The front side of the guide plate of the oil net structure is installed on the smoke collecting hood with an upward tilt, and an oil box is installed on the rear side of the smoke collecting hood; a plurality of oil leakage holes are provided at the bottom of the oil guide groove arranged on the periphery of the guide plate, and the oil leakage holes are connected to the oil box.

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