Oil screen device and range hood

Abstract

The utility model relates to an oil screen device and a range hood. The oil screen device comprises a first oil screen and a second oil screen which are sequentially arranged in the airflow direction at an air inlet, the back face of the first oil screen is provided with an inserting groove which is provided with an opening in the side portion and extends in the moving direction of the second oil screen. The reset guide module can be inserted into the slot through the side opening of the slot, the reset guide module comprises a positioning seat, a guide rod and an elastic piece, the positioning seat is provided with a slide way extending in the moving direction of the second oil screen, the guide rod axially slides and is limited in the slide way, and the elastic piece is arranged on the guide rod. One end of the guide rod is exposed out of the slide way to serve as a connecting end connected with the second oil screen, the elastic piece acts on the guide rod, so that the guide rod always has the trend of moving in the second direction, and the first direction and the second direction are opposite and are parallel to the extending direction of the second oil screen. The oil screen device has the advantages of being convenient and fast to disassemble and assemble and easy to clean.

Description

Technical Field

[0001] This utility model relates to the field of range hood technology, and in particular to an oil filter device and a range hood. Background Technology

[0002] A range hood is a kitchen appliance used to purify the kitchen environment. Range hoods typically include top-mounted and side-mounted types. Side-mounted range hoods utilize the principle of vortex air pressure to absorb most of the cooking fumes close to the stove in an arc shape, reducing adverse effects on human health. Moreover, since the power source is closer to the stove, it does not significantly reduce the suction efficiency of the power source.

[0003] Traditional range hoods typically use a fixed, integrated oil filter. When cooking on one side of the kitchen, the airflow cannot be effectively utilized to extract the fumes. This results in smoke escaping easily when cooking on a low setting, while the range hood becomes too noisy at high settings, failing to achieve efficient and quiet extraction. A similar range hood is disclosed in Chinese invention patent application number 202010058463.9.

[0004] To rationally allocate the air intake volume of a range hood and effectively utilize its airflow for fume extraction, Chinese utility model patent application CN202120687387.8 (authorization announcement number CN215570676U) discloses an air intake component and a range hood using the same component. The air intake component includes a panel with a first oil filter at the air inlet. Two first oil filters are present, with one end of each filter close to the other and the other end far apart. The component also includes a second oil filter, with each first oil filter corresponding to one second oil filter. The second oil filters can move away from or towards the other second oil filter. Each second oil filter can be in a first position and a second position. In the first position, the second oil filter cooperates with the first oil filter to fully open the air inlet. In the second position, the second oil filter cooperates with the first oil filter to partially open the air inlet. The position of the oil mesh is adjusted and reset via spring assemblies. The body of each spring assembly is fixed to the side of the first oil mesh facing inwards from the housing, and the pressure head of each spring assembly abuts against the opposite ends of the two second oil meshes. When the transmission rod drives the cam to rotate in a certain direction, the corresponding second oil mesh slides towards the corresponding elastic element, causing the elastic element to be compressed. When the transmission rod rotates in the opposite direction, the force of the cam on the stop on the second oil mesh disappears, and the second oil mesh slides back to its original position under the restoring force of the elastic element. A limiting guide rail is provided on the flange of the first oil mesh, and inserts that slide and engage with the limiting guide rail are formed at the upper and lower ends of the second oil mesh. The limiting guide rail serves to guide and limit the sliding of the second oil mesh. A limiting guide groove extending left and right is formed on the limiting guide rail, penetrating the end of the limiting guide rail of the corresponding first oil mesh away from the other first oil mesh; the penetrating end constitutes the entrance of the limiting guide groove.

[0005] However, the air intake components in the aforementioned patent applications still have certain shortcomings. The spring assembly and the limiting guide rail in the aforementioned patent applications are both fixed to the first oil screen. The inner oil screen can only be moved laterally during installation and disassembly. However, since the side operating space of the oil screen device is relatively small, it is very laborious to install and disassemble the inner oil screen, resulting in low installation and disassembly efficiency. On the other hand, since the spring assembly and the limiting guide rail are both fixed to the first oil screen, it is also easy to make the oil screen very inconvenient to clean, resulting in dead corners for hygiene.

[0006] Therefore, the existing oil filter devices in range hoods still need further improvement. Utility Model Content

[0007] The first technical problem to be solved by this utility model is to provide an oil filter device that is easy to assemble and disassemble and easy to clean, in light of the current state of the technology.

[0008] The second technical problem to be solved by this utility model is to provide a range hood that uses the above-mentioned oil mesh device, in view of the current state of the prior art.

[0009] The technical solution adopted by this utility model to solve the first technical problem is as follows:

[0010] An oil mesh device is arranged at the air inlet of a range hood, including a first oil mesh and a second oil mesh arranged sequentially along the airflow direction at the air inlet. The first oil mesh is provided with a first air inlet hole, and the second oil mesh is provided with a second air inlet hole. The second oil mesh is driven by a driving mechanism and can move linearly relative to the first oil mesh along a first direction, thereby changing the relative position of the second air inlet hole on the second oil mesh and the first air inlet hole on the first oil mesh.

[0011] The back of the first oil mesh is provided with a slot that has an opening on the side and extends along the moving direction of the second oil mesh;

[0012] It also includes a reset guide module that can be inserted into the slot through the side opening of the slot. The reset guide module includes a positioning seat, a guide rod, and an elastic element. The positioning seat has a slide rail extending along the moving direction of the second oil mesh. The guide rod is axially slidably limited in the slide rail, and one end protrudes outside the slide rail as a connection end connected to the second oil mesh. The elastic element acts on the guide rod, so that the guide rod always has a tendency to move along the second direction. The first direction is opposite to the second direction and is parallel to the extending direction of the second oil mesh.

[0013] To prevent the guide module from coming out of the slot, the reset guide module has at least two spaced apart along the first direction, and the back of the first oil mesh also has at least two corresponding slots. The back of the first oil mesh is provided with a limiting member at a position corresponding to at least one slot to restrict the guide module from coming out of the corresponding slot.

[0014] As an improvement, the first oil mesh has two opposing first sides in the direction of movement of the second oil mesh. Each of the two first sides of the first oil mesh has a first folded edge extending towards the side where the second oil mesh is located. One of these first folded edges faces the insertion port of an adjacent slot. The end of the guide rod of the reset guide module, inserted into the slot, abuts against this first folded edge. This first folded edge constitutes the aforementioned limiting member. Using the folded edge of the outer periphery of the first oil mesh as the limiting member simplifies the structure of the first oil mesh and reduces production costs.

[0015] To ensure the stability of the movement of the second oil mesh relative to the first oil mesh, the first oil mesh is square, and slots are provided at the four corners of the back of the first oil mesh, with the side openings of each slot facing the same direction. There are also four reset guide modules, which are respectively located in the four slots, and the ends of the guide rods of two of the reset guide modules abut against the first folded edge.

[0016] To facilitate connection between the second oil mesh and the guide rod, the second oil mesh has a first side and a second side that are opposite to each other and parallel to the direction of movement of the second oil mesh. Each of the first and second sides is provided with two support arms that are spaced apart along the direction of movement of the second oil mesh and extend outward from the side. Each support arm is connected to the connection end of the guide rod of the four reset guide modules.

[0017] The aforementioned elastic element can be made using various existing technologies, including compression springs, torsion springs, leaf springs, and other elastic elements. However, in order to better cooperate with the aforementioned guide rod, the guide rod has a radially outward protruding limiting stop. The elastic element is a return spring, which is located inside the slide and abuts against the limiting stop of the guide rod.

[0018] To facilitate the resetting of the guide module and the second oil screen, and to make cleaning of the second oil screen easier, the connection between the support arm of the second oil screen and the guide rod is detachable.

[0019] As an improvement, the end of the support arm is formed with a rolled flange, and a bushing is provided inside the rolled flange for the connecting end of the guide rod to pass through. Generally, due to considerations of machining accuracy, the rolled flange may not be able to fit the end of the guide rod after forming. If it is directly fitted and installed, it is easy to cause the second oil screen to wobble. Therefore, the aforementioned bushing can be added to adapt the installation.

[0020] To ensure a secure installation of the bushing and the rolled flange, the bushing includes a bushing body and at least two spring arms arranged sequentially at intervals along the circumference of the bushing body and extending axially. Each spring arm has a positioning protrusion that protrudes radially outward at the end away from the bushing body. The end of the bushing body has a limiting stop that protrudes radially outward, and the end of the rolled flange also has a limiting recess. When the bushing is installed in the rolled flange, the limiting stop abuts against the end of the rolled flange, and the positioning protrusion of each spring arm is engaged in the limiting recess.

[0021] In order to adjust the air intake volume on the left and right sides of the air inlet to adapt to different cooking conditions on the left and right sides, the first oil mesh has a first air intake area and a second air intake area arranged sequentially along the first direction and both having first air intake holes. There are two second oil meshes arranged sequentially along the first direction. One second oil mesh is opposite to the first air intake area of ​​the first oil mesh, and the other second oil mesh is opposite to the second air intake area of ​​the first oil mesh. The two second oil meshes are driven by the same drive mechanism and can move relative to the first oil mesh, thereby changing the air intake state of the air intake area on the side where the second oil mesh is located.

[0022] The technical solution adopted by this utility model to solve the second technical problem is: a range hood, including a housing, an air inlet on the housing, and an oil screen at the air inlet, wherein the oil screen adopts the above-mentioned oil screen device.

[0023] Compared with the prior art, the advantages of this utility model are: the reset guide module can be easily inserted into and removed from the slot on the back of the first oil mesh. After the reset guide module is inserted into the slot, due to the structural limiting effect of the slot, the reset guide module is not easy to detach from the slot. When disassembling the second oil mesh, the guide module can also be removed from the side insertion port of the slot of the first oil mesh. This structural design simplifies the frame structure of the first oil mesh, facilitates the cleaning of the first oil mesh, and eliminates cleaning dead zones. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural schematic diagram of the oil mesh device according to an embodiment of the present utility model;

[0025] Figure 2 This is a three-dimensional structural schematic diagram of the oil mesh device according to an embodiment of the present utility model;

[0026] Figure 3 This is an exploded view of the oil mesh device according to an embodiment of the present utility model;

[0027] Figure 4 This is an exploded view of the guide module of the oil mesh device according to an embodiment of the present utility model;

[0028] Figure 5 This is a three-dimensional structural diagram of the back side of the first oil mesh according to an embodiment of the present invention. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0030] In the specification and claims of this utility model, terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0031] Figures 1-5 This illustration shows a preferred embodiment of the oil filter device and range hood of this utility model. The range hood includes a housing and a centrifugal fan disposed within the housing. The housing generally includes a fan frame and a smoke collection hood disposed at the bottom of the fan frame, with the inner cavity of the fan frame communicating with the inner cavity of the smoke collection hood. An air inlet is provided on the front side wall of the smoke collection hood, allowing external fumes to enter the hood. The centrifugal fan is disposed within the fan frame; during operation, the centrifugal fan generates negative pressure, drawing external fumes into the smoke collection hood through the air inlet. An oil filter device is also provided at the air inlet of the smoke collection hood for filtering fumes. An oil cup, which is an elongated strip extending laterally, is provided at the bottom of the smoke collection hood to collect oil stains flowing down from the hood.

[0032] Figure 1 and Figure 2The diagrams show the three-dimensional structure of the oil mesh device from the front and back angles of this embodiment. The oil mesh device includes a first oil mesh 10 and a second oil mesh 20 disposed on the back of the first oil mesh 10, that is, the first oil mesh 10 and the second oil mesh 20 are arranged sequentially along the airflow direction at the air inlet. The first oil mesh 10 is provided with a first air inlet hole 100, and the second oil mesh 20 is provided with a second air inlet hole 200, wherein both the first air inlet hole 100 and the second air inlet hole 200 are strip-shaped holes with the same extension direction. The first oil mesh 10 has a first air inlet area 101 and a second air inlet area 102, which are arranged sequentially along the first direction A1 and each has a first air inlet hole 100 distributed thereon. There are two second oil meshes 20, which are also arranged sequentially along the first direction A1. One second oil mesh 20 is opposite to the first air inlet area 101 of the first oil mesh 10, and the other second oil mesh 20 is opposite to the second air inlet area 102 of the first oil mesh 10. More specifically, the first oil mesh 10 includes two sub-oil meshes 11 arranged sequentially along the first direction A1, which together constitute the first air inlet area 101 and the second air inlet area 102 of the first oil mesh 10. The second oil mesh 20 can be driven by a drive mechanism to move linearly relative to the first oil mesh 10 along the first direction A1, wherein the first direction A1 is parallel to the extension direction of the first oil mesh 10. When the second oil mesh 20 moves relative to the first oil mesh 10, the relative position of the second air inlet 200 on the second oil mesh 20 and the first air inlet 100 on the first oil mesh 10 changes. As a result, the area of ​​overlap between the first air inlet 100 and the second air inlet 200 in the flow direction of the air inlet changes, thereby achieving the purpose of regulating the air intake volume.

[0033] One of the sub-oil meshes 11 of the first oil mesh 10 and the corresponding second oil mesh 20 constitute an oil mesh unit. The oil mesh device in this embodiment includes two oil mesh units sequentially spliced ​​together, arranged symmetrically. The movement of the second oil meshes 20 in the two oil mesh units is independent, and the adjustment of the air intake volume is also independent, thus adapting to the cooking conditions on both sides of the range hood. In this embodiment, the two second oil meshes 20 are driven by the same drive mechanism and can move relative to the first oil mesh 10 (corresponding sub-oil mesh 11), thereby changing the air intake state of the air intake area on the side where the second oil mesh 20 is located. The drive mechanism is generally located at the junction of the two oil mesh units. The drive mechanism for moving the second oil mesh 20 can adopt various motion mechanisms formed by the cooperation of a drive motor and a swing arm or cam transmission, such as the motion mechanism of Chinese utility model patent application number CN202120687387.8 (authorization announcement number: CN215570676U).

[0034] Taking an oil mesh unit formed by the cooperation of one of the sub-oil meshes 11 of the first oil mesh 10 and the corresponding second oil mesh 20 as an example, the first oil mesh 10 (sub-oil mesh 11) has two opposite sides in a first direction. Each of these two sides has a first folded edge 12 extending towards the side where the second oil mesh 20 is located, and the extension direction of the two first folded edges 12 is perpendicular to the first direction. The first oil mesh 10 also has two opposite sides in a direction perpendicular to the first direction. Each of these two sides of the first oil mesh 10 has a second folded edge 13 extending towards the side where the second oil mesh 20 is located, and the extension direction of the two second folded edges 13 is parallel to the first direction.

[0035] The first oil mesh 10 has guide modules 30 at each of its four corners on the back side, and these four guide modules 30 have identical structures. The second oil mesh 20 has a first side and a second side that are vertically opposite each other and parallel to the moving direction of the second oil mesh 20. Each of the first and second sides has a support arm 21 that is spaced apart along the moving direction of the second oil mesh 20 and extends outward from that side. The four support arms 21 of the second oil mesh 20 are connected to the four guide modules 30. Specifically, the first oil mesh 10 has slots 14 at each of its four corners on the back side, which are open on the side and extend along the moving direction of the second oil mesh 20. The side openings of the four slots 14 face the same direction. Each of the four guide modules 30 can be inserted into the corresponding slot 14 through the side opening of the slot 14, and the slots 14 restrict the movement of the guide modules 30 relative to the first oil mesh 10 (especially in the front-back and vertical directions). The slots 14 of the first oil mesh 10 can be formed by folding the side edge of the first oil mesh 10 accordingly. The other end of each of the four slots is either a closed structure or equipped with a corresponding stop to prevent the guide module 30 from detaching from the other end. For example... Figure 3 As shown, the other ends of the two slots on the left side of the first oil mesh are blocked by the first folded edge of the first oil mesh as a stop, and the other ends of the two slots on the right side are blocked by a limiting flange as a stop.

[0036] The guide module 30 includes a positioning seat 31, a guide rod 32, and an elastic element 34. The positioning seat 31 is an elongated cuboid structure, comprising a seat body 314 and a cover 313. The cover 313 is connected to the seat body 314 by multiple extending elastic buckles. After the cover 313 and the seat body 314 are engaged, a slide 310 extending along the first direction A1 is defined. The slide 310 is a stepped channel structure with a large diameter in the middle and small diameters on the left and right sides (having two steps). The guide rod 32 is axially slidably limited in the slide 310, and one end protrudes outside the slide 310 to serve as a connecting end 321 connected to the support arm 21 of the second oil mesh 20. The elastic element 34 is preferably a return spring, which is located in the middle section of the slide 310, specifically sleeved outside the guide rod 32. The guide rod 32 has a radially outward protruding limiting stop 320, which can be a flange structure protruding from the outer peripheral wall of the guide rod 32. The guide rod 32 is also fitted with a limiting sleeve 33 (preferably a metal sleeve with a certain strength), which is also located in the middle section of the slide 310. The outer diameter of the limiting sleeve 33 is larger than the diameter of the small hole section of the slide 310. Thus, the limiting sleeve 33 can abut against one step of the slide 310, and the limiting stop 320 of the guide rod 32 can abut against another step of the slide 310. The aforementioned return spring is located between the limiting stop 320 and the limiting sleeve 33 of the guide rod 32. That is, one end of the return spring abuts against the limiting stop 320 of the guide rod 32, and the other end abuts against the limiting sleeve 33. Under the action of the return spring, the guide rod 32 always has the tendency to move along the second direction A2. The aforementioned second direction A2 is opposite to the first direction A1, and both are parallel to the extension direction of the second oil mesh 20.

[0037] In this embodiment, the connecting ends 321 of the guide rods 32 of the four guide modules 30 are oriented in the same direction.

[0038] The support arm 21 of the second oil mesh 20 is detachably connected to the connecting end 321 of each of the guide rods 32. The end of the support arm 21 has a rolled flange 211, and the end of the rolled flange 211 also has a limiting notch 2110. Due to limitations in machining precision, the rolled flange 211 cannot be directly inserted into the end of the guide rod 32, otherwise, wobbling may occur. Therefore, the rolled flange 211 has a bushing 23 (preferably made of plastic) through which the connecting end 321 of the guide rod 32 passes. The bushing 23 includes a bushing body 231 and at least two spring arms 232 arranged sequentially at intervals along the circumference of the bushing body 231 and extending axially. Since the spring arms 232 can swing, the internal space enclosed by each spring arm 232 can also contract or expand radially. Each spring arm 232 also has a radially outward protruding positioning protrusion 2320 at the end away from the bushing body 231. The end of the bushing body 231 has a first limiting stop 233 that protrudes radially outward. When the bushing 23 is installed in the rolled flange 211, the first limiting stop 233 abuts against the end of the rolled flange 211, and the positioning protrusions 2320 of each spring arm 232 are correspondingly engaged in the limiting recesses 2110 of the rolled flange 211, thereby achieving axial and circumferential limiting of the bushing 23 by the rolled flange 211. When installing the guide module 30, the connecting end 321 of the guide rod 32 can be directly inserted into the bushing 23.

[0039] The installation process of the combined structure of the oil mesh device in this embodiment is as follows:

[0040] 1. Install the corresponding bushings 23 in the four rolled edges 211 of the second oil mesh 20.

[0041] 2. Insert the connecting end 321 of the guide rod 32 of the guide module 30 into the corresponding bushing 23 in the rolled flange 211.

[0042] 3. Insert the two guide modules 30 on the left into the two slots 14 on the left side of the first oil mesh 10, so that the two guide modules 30 abut against the inside of the first folded edge 12 on the left side of the first oil mesh 10.

[0043] 4. Push the two guide modules 30 on the right to move to the right (i.e., in the direction where the return spring is compressed), and at the same time flip the second oil screen 20 so that the two guide modules 30 on the right are inserted into the two slots on the right, and the ends of the guide rods of the two guide modules abut against the first folded edge 12 on the right side of the first oil screen 10 (the first folded edge also constitutes a limiting member for restricting the guide modules 30 from coming out of the slots).

[0044] 5. Remove the force applied to the two guide modules 30 on the right side. At this time, the two guide modules 30 move to the left under the restoring force of their return springs until the two guide modules 30 are inserted into the two slots 14 on the right side. The installation is now complete. In this initial state, the return springs of the guide modules 30 are in a compressed state.

[0045] The disassembly method is as follows:

[0046] 1. Push the two guide modules 30 on the right to move to the right, so that they leave their respective slots 14.

[0047] 2. Slightly flip the second oil mesh 20 upwards, and the two guide modules 30 on the right side will leave the first oil mesh 10. Then remove these two guide modules 30.

[0048] 3. Hold the guide module 30 on the left and move it to the right so that it leaves its respective slot 14.

[0049] 4. Pull the second oil mesh 20 upwards. At this time, the second oil mesh 20, together with the guide module 30, is separated from the first oil mesh 10. Thus, the disassembly process of the second oil mesh 20 and the first oil mesh 10 is completed.

[0050] In this embodiment, the inner and outer oil filters (second oil filter 20 and first oil filter 10) achieve two main functions: detachability and mobility, through corresponding guide modules 30. The detachable function allows for quick separation of the inner and outer oil filters, facilitating individual cleaning of each part. The mobility function enables the distribution of airflow within the range hood, optimizing the user's cooking experience based on actual cooking conditions. The four guide modules 30 are independent of each other, allowing for complete and quick detachment of the guide module 30, the first oil filter 10, and the second oil filter 20. The guide modules 30 integrate various components (guide rod 32, return spring, etc.), ensuring the simplicity and reliability of the frame structure. The sealing of the guide modules 30 reduces oil contamination of the guide rod 32, return spring, and other components, ensuring the reliable movement of the second oil filter 20 along the guide rod 32. The four guide modules 30 in this embodiment employ the same structural design, greatly simplifying the structure and improving not only the reliability and stability of the frame module but also ensuring convenient installation, disassembly, and cleaning for the user. The second oil mesh 20, through the guide module 30, not only achieves the functions of quick installation and quick disassembly, but also reciprocates relative to the first oil mesh 10, thereby changing the air intake area of ​​the oil mesh device, realizing the function of flow distribution, and optimizing the user's cooking experience.

Claims

1. An oil mesh device, arranged at the air inlet of a range hood, comprising a first oil mesh (10) and a second oil mesh (20) arranged sequentially along the airflow direction at the air inlet, wherein the first oil mesh (10) is provided with a first air inlet hole (100), and the second oil mesh (20) is provided with a second air inlet hole (200), wherein the second oil mesh (20) is driven by a driving mechanism to move linearly relative to the first oil mesh (10) in a first direction, thereby changing the relative position of the second air inlet hole (200) on the second oil mesh (20) and the first air inlet hole (100) on the first oil mesh (10); Its features are: The back of the first oil mesh (10) is provided with a slot (14) that is open on the side and extends along the moving direction of the second oil mesh (20); It also includes a reset guide module (30) that can be inserted into the slot (14) through the side opening of the slot (14). The reset guide module (30) includes a positioning seat (31), a guide rod (32), and an elastic element (34). The positioning seat (31) has a slide (310) extending along the moving direction of the second oil mesh (20). The guide rod (32) is axially slidably limited in the slide (310), and one end protrudes outside the slide (310) as a connection end (321) connected to the second oil mesh (20). The elastic element (34) acts on the guide rod (32), so that the guide rod (32) always has a tendency to move along the second direction. The first direction is opposite to the second direction and is parallel to the extending direction of the second oil mesh (20).

2. The oil mesh device according to claim 1, characterized in that: The reset guide module (30) has at least two spaced apart along the first direction, and the slot (14) on the back of the first oil mesh (10) also has at least two corresponding slots. The back of the first oil mesh (10) is provided with a limiting member at a position corresponding to at least one slot (14) to restrict the guide module (30) from being dislodged from the insertion port of the corresponding slot (14).

3. The oil mesh device according to claim 2, characterized in that: The first oil mesh (10) has two opposing first sides in the moving direction of the second oil mesh (20). The two first sides of the first oil mesh (10) have first folded edges (12) that fold towards the side where the second oil mesh (20) is located. One of the first folded edges (12) is opposite to the insertion port of the adjacent slot (14). The end of the guide rod (32) of the reset guide module (30) inserted into the slot (14) abuts against the first folded edge (12). The first folded edge (12) constitutes the limiting member.

4. The oil mesh device according to claim 3, characterized in that: The first oil mesh (10) is square. The slots (14) are provided at the four corners of the back of the first oil mesh (10). The side openings of each slot (14) face the same direction. There are also four reset guide modules (30), which are respectively located in the four slots (14). The ends of the guide rods (32) of two of the reset guide modules (30) abut against the first folded edge (12).

5. The oil mesh device according to claim 3, characterized in that: The second oil mesh (20) has a first side and a second side that are opposite to each other and are parallel to the moving direction of the second oil mesh (20). The first side and the second side are provided with two support arms (21) that are spaced apart along the moving direction of the second oil mesh (20) and extend outward from the side. Each support arm (21) is connected to the connection end (321) of the guide rod (32) of the four reset guide modules (30).

6. The oil mesh device according to claim 3, characterized in that: The guide rod (32) has a radially outward protruding limiting stop (320), and the elastic element (34) is a return spring, which is located in the slide (310) and abuts against the limiting stop (320) of the guide rod (32).

7. The oil mesh device according to claim 5, characterized in that: The support arm (21) of the second oil mesh (20) and the connecting end (321) of the guide rod (32) are detachably connected.

8. The oil mesh device according to claim 7, characterized in that: The end of the support arm (21) is formed with a rolled flange (211), and a bushing (23) is provided inside the rolled flange (211) for the connecting end (321) of the guide rod (32) to pass through.

9. The oil mesh device according to claim 8, characterized in that: The bushing (23) includes a bushing body (231) and at least two spring arms (232) arranged sequentially at intervals along the circumference of the bushing body (231) and extending axially. Each spring arm (232) has a positioning protrusion (2320) that protrudes radially outward at one end away from the bushing body (231). The end of the bushing body (231) has a limiting stop (233) that protrudes radially outward. The end of the rolled flange (211) is also provided with a limiting recess (2110). When the bushing (23) is installed in the rolled flange (211), the limiting stop (233) abuts against the end of the rolled flange (211), and the positioning protrusion (2320) of each spring arm (232) is engaged in the limiting recess (2110).

10. The oil mesh device according to any one of claims 1 to 9, characterized in that: The first oil mesh (10) has a first air inlet area (101) and a second air inlet area (102) arranged sequentially along the first direction and each having a first air inlet hole (100). There are two second oil meshes (20), arranged sequentially along the first direction. One second oil mesh (20) is opposite to the first air inlet area (101) of the first oil mesh (10), and the other second oil mesh (20) is opposite to the second air inlet area (102) of the first oil mesh (10). The two second oil meshes (20) are driven by the same driving mechanism and can move relative to the first oil mesh (10), thereby changing the air inlet state of the air inlet area on the side where the second oil mesh (20) is located.

11. A range hood, comprising a housing, an air inlet on the housing, and an oil filter at the air inlet, characterized in that: The oil mesh is the oil mesh device according to any one of claims 1 to 10.

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