Oil screen device and range hood

Abstract

The utility model relates to an oil screen device and a range hood, the oil screen device is arranged at an air inlet of the range hood, the oil screen device comprises a first oil screen assembly and a second oil screen assembly which are sequentially arranged along the airflow direction of the air inlet, and the second oil screen assembly comprises two movable oil screens which are sequentially arranged along the first direction; the moving mechanism comprises a driving motor and a swing arm mechanism in transmission connection with an output shaft of the driving motor, the swing arm mechanism comprises a rotating shaft and a swing arm which is installed on the rotating shaft and can rotate along with the rotating shaft, and the axis of the rotating shaft is perpendicular to the plane where the movable oil screen is located. The swing arm can selectively drive one of the two movable oil nets to linearly move relative to the first oil net in the first direction in the process of rotating along with the rotating shaft, and therefore the air inlet state of the air inlet area on the side where the movable oil net is located is changed. The oil screen device has the advantages that the oil screen device adopts the movement mechanism for driving the oil screen to move left and right for flow distribution, and the operation process is more stable and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen appliances, in particular to an oil net device and a range hood. Background Art

[0002] A range hood is a kitchen appliance that purifies the kitchen environment. Existing range hoods typically include a housing and a fan system housed within it. The housing features an air inlet, which is fitted with an oil filter to filter oil fumes. Existing range hood oil filters are often fixed, and most homeowners often leave only one side of the stove open while the other is closed. Alternatively, they may use different cooking methods, such as stir-frying on one side and boiling soup on the other. This results in inconsistent oil fume production on both sides of the stove. Existing range hoods are unable to adjust the air volume on the left and right sides based on stove usage to match the user's cooking habits.

[0003] To address the aforementioned technical issues, Chinese utility model patent application number CN202120676145.9 (grant publication number CN215216376U) discloses an air inlet assembly and a range hood employing the same. The air inlet assembly includes a panel defining an air inlet. A first oil screen is disposed at the air inlet. The first oil screens have two ends, one of which is close to each other and the other ends of which are spaced apart. The air inlet assembly also includes a second oil screen, one corresponding to each first oil screen. Each second oil screen is movable between a first position and a second position. In the first position, the second oil screen cooperates with the first oil screen to fully open the air inlet. In the second position, the second oil screen cooperates with the first oil screen to partially open or close the air inlet. The second oil screen is slidable between the first and second positions, thereby ensuring a proper distribution of airflow to the left and right sides of the air inlet.

[0004] However, the air inlet assembly of the above-mentioned range hood still has certain shortcomings. The displacement switching of the first oil screen or the second oil screen is driven by the rotation of the cam or the shift block driven by the motor. Since the rotation axis direction of the shift block or the swing arm is parallel to the plane where the oil screen is located, the force applied by the cam or the shift block on the oil screen is not only used to push the oil screen forward, but also includes a component of force acting vertically on the oil screen downward or upward. The force perpendicular to the oil screen downward or upward will generate a flipping torque, which will flip the oil screen upward or downward. Long-term movement will cause the oil screen to deform, resulting in the oil screen's movement being stuck or even unable to move.

[0005] Therefore, the existing oil screen assembly and range hood need further improvement. Utility Model Content

[0006] The first technical problem to be solved by the present invention is to provide an oil screen device in view of the current status of the existing technology. The motion mechanism used in the oil screen device to drive the oil screen to move left and right to distribute the flow has a more stable and reliable operation process.

[0007] The second technical problem to be solved by the present invention is to provide a range hood using the above oil net device in view of the current status of the existing technology.

[0008] The technical solution adopted by the present invention to solve the first technical problem is: an oil net device is arranged at the air inlet of the range hood, including a first oil net assembly and a second oil net assembly arranged in sequence along the air flow direction at the air inlet, the first oil net assembly includes a first oil net, which has a first air inlet area and a second air inlet area arranged in sequence along the first direction and both distributed with first air inlet holes, the second oil net assembly includes two movable oil nets arranged in sequence along the first direction, both distributed with second air inlet holes, one of the movable oil nets is opposite to the first air inlet area of the first oil net, and the other movable oil net is opposite to the first air inlet area of the first oil net, The second air inlet area of the first oil net is opposite to the second air inlet area, and also includes a motion mechanism, which includes a driving motor and a swing arm mechanism that is transmission-connected to the output shaft of the driving motor. The swing arm mechanism includes a rotating shaft and a swing arm installed on the rotating shaft and capable of rotating with the rotating shaft. The rotating shaft is transmission-connected to the output shaft of the driving motor and can rotate around its own axis. The axis of the rotating shaft is perpendicular to the plane where the movable oil net is located. The swing arm can selectively drive one of the two movable oil nets to move linearly in the first direction relative to the first oil net during the rotation process with the rotating shaft, thereby changing the air inlet state of the air inlet area on the side where the movable oil net is located.

[0009] The aforementioned change in “air intake state” may be understood as a change in the air intake volume or a change in the position of the air intake area.

[0010] By controlling the forward and reverse rotation of the drive motor, the swing arm can selectively contact the corresponding movable oil net, thereby pushing the two movable oil nets to perform translational motion relative to the first oil net, changing the air intake state of the air intake area on this side, that is, it can drive the movable oil nets on different sides to move in an intermittent motion, thereby realizing the flow distribution of the smoke inlets on both sides. Among them, since the axis of the rotating shaft used to drive the swing arm to rotate is perpendicular to the plane where the movable oil net is located, the force exerted by the swing arm on the movable oil net is decomposed into a force that pushes the oil net forward and a force acting horizontally on the oil net (basically parallel to the plane where the oil net is located). Although this horizontal action will also produce a flipping torque, the oil net's resistance to flipping in the horizontal direction is much greater than that in the vertical direction. The influence of this force on the oil net is negligible relative to the strength of the oil net itself. Therefore, the way in which the motion mechanism of the utility model acts on the oil net can ensure the stability of long-term motion and the reliability of the overall structure.

[0011] In order to facilitate the coordination with the swinging action, the one of the two movable oil nets opposite to the first air inlet area of the first oil net is recorded as the first movable oil net, and the one opposite to the second air inlet area of the first oil net is recorded as the second movable oil net. The first movable oil net is provided with a first vertical plate perpendicular to the main body of the first movable oil net on the side away from the first oil net, and the second movable oil net is provided with a second vertical plate perpendicular to the main body of the second movable oil net on the side away from the first oil net. The swing arm can resist the first vertical plate during the rotation with the rotating shaft, thereby driving the first movable oil net away from the second movable oil net. The swing arm can resist the second vertical plate during the rotation with the rotating shaft, thereby driving the second movable oil net away from the first movable oil net.

[0012] As an improvement, the first vertical plate and the second vertical plate are correspondingly arranged at a pair of side edge positions adjacent to the first movable oil net and the second movable oil net, and the swing arm is located between the first movable oil net and the second movable oil net, and can act on the first vertical plate and the second vertical plate respectively when rotating forward and reversely with the rotating shaft.

[0013] In order to avoid interference problems or installation difficulties caused by the main body of the swing arm being too close to the movable oil net, the main body of the swing arm is located on the side of the movable oil net away from the first oil net, and the end of the swing arm has a drive pin extending toward the movable oil net and extending into between the first vertical plate and the second vertical plate.

[0014] In order to adjust the air volume, the two movable oil screens have at least a first state and a second state as their relative positions relative to the first oil screen change:

[0015] In the first state, the second air inlet holes on the movable oil screen are opposite to the first air inlet holes on the first oil screen corresponding to the air inlet area;

[0016] In the second state, the second air inlet holes on the movable oil net are staggered with the first air inlet holes in the corresponding air inlet area on the first oil net, that is, the walls between adjacent second air inlet holes on the movable oil net block at least part of the first air inlet holes in the corresponding air inlet area on the first oil net.

[0017] In order to enable the movable oil screen to automatically return to its initial position (i.e., fully open state) when no pressure is applied by the corresponding swing arm, one of the two movable oil screens, which is opposite to the first air inlet area of the first oil screen, is referred to as a first movable oil screen, and the other, which is opposite to the second air inlet area of the first oil screen, is referred to as a second movable oil screen. The oil screen device further includes:

[0018] a first elastic member acting on the first movable oil net and causing the first movable oil net to always have a tendency to remain in the first state;

[0019] The second elastic member acts on the second movable oil net and makes the second movable oil net always have a tendency to remain in the first state.

[0020] The elastic member can adopt various existing technologies and can include various elastic elements such as compression springs, torsion springs, and spring leaves. However, in order to better cooperate with the movable oil net, a first guide rod extending in a first direction is provided at the first air inlet area of the first oil net. The first elastic member is a first spring sleeved on the first guide rod. A first fixing sleeve sleeved outside the first guide rod is further provided at the side of the first movable oil net. The first fixing sleeve abuts against the end of the first spring.

[0021] A second guide rod extending along the first direction is provided at the second air inlet area of the first oil net, and the second elastic member is a second spring sleeved on the second guide rod. A second fixed sleeve sleeved outside the second guide rod is also provided at the side of the second movable oil net, and the second fixed sleeve is abutted against the end of the second spring.

[0022] In order to ensure the stability of the movement of the guide rod, a first mounting bracket is provided at the first air inlet area of the first oil screen, the first mounting bracket having two first mounting plates spaced apart along a first direction, the two first mounting plates being provided with first guide holes, and the first guide rod being slidably inserted into the first guide holes of the two first mounting plates;

[0023] A second mounting bracket is provided at the second air inlet area of the first oil net, and the second mounting bracket has two second mounting plates spaced apart along the first direction. Second guide holes are provided on the two second mounting plates, and the second guide rod can be slidably passed through the second guide holes of the two second mounting plates.

[0024] In order to further improve the stability of the movable oil net in movement relative to the first oil net, the first movable oil net and the second movable oil net both have first and second sides that are opposite and parallel to the first direction, and the first side and second side of the first movable oil net are both provided with the first fixing sleeve, and the first side and second side of the second movable oil net are both provided with the second fixing sleeve.

[0025] The technical solution adopted by the present invention to solve the second technical problem is: a range hood, including a casing, an air inlet is opened on the casing, an oil net is provided at the air inlet, and the characteristic is that the oil net adopts the above-mentioned oil net device.

[0026] In order to automatically adjust the air intake state of the oil net device according to the cooking conditions, it also includes a status detection device for detecting the cooking status on the left and right sides. The status detection device and the drive motor of the motion mechanism are electrically connected to the controller of the range hood. The controller can control the action of the drive motor according to the cooking status signal transmitted by the status detection device, thereby driving the corresponding active oil net to move to change the air intake state of the air intake area on the side where the active oil net is located.

[0027] In order to avoid blocking the air inlet area at the air inlet due to the installation of the drive motor, the two movable oil nets are arranged in sequence along the left and right directions, and the installation position of the drive motor is located on the upper side or lower side of the area where the air inlet of the casing is located.

[0028] Compared with the existing technology, the advantages of the present invention are as follows: by controlling the forward and reverse rotation of the driving motor, the swing arm can selectively contact the corresponding movable oil net, thereby pushing the two movable oil nets to perform translational motion relative to the first oil net, changing the air intake state of the air intake area on this side, that is, it can drive the movable oil nets on different sides to move in an intermittent motion, thereby realizing the flow distribution of the smoke inlets on both sides. Among them, since the axis of the rotating shaft used to drive the swing arm to rotate is perpendicular to the plane where the movable oil net is located, the force exerted by the swing arm on the movable oil net is decomposed into a force that pushes the oil net forward and a force acting horizontally on the oil net (basically parallel to the plane where the oil net is located). Although this horizontal action will also produce a flipping torque, the oil net's resistance to flipping in the horizontal direction is much greater than that in the vertical direction. The influence of this force on the oil net is negligible relative to the strength of the oil net itself. Therefore, the way the motion mechanism of the present invention acts on the oil net can ensure the stability of long-term motion and the reliability of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the three-dimensional structure of the oil net device according to an embodiment of the present utility model;

[0030] Figure 2 This is an exploded view of the oil screen device according to an embodiment of the present invention;

[0031] Figure 3 This is a partial enlarged view of the oil screen device according to an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the three-dimensional structure of the range hood according to an embodiment of the present utility model. DETAILED DESCRIPTION

[0033] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0034] In the specification and claims of the present invention, directional terms such as "front," "back," "up," "down," "left," "right," "side," "top," and "bottom" are used to describe various exemplary structural parts and components of the present invention. However, these terms are used herein for convenience of description only and are based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different orientations, these directional terms are intended for illustrative purposes only and should not be construed as limiting. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0035] Figure 1-Figure 4 A preferred embodiment of the oil screen device and range hood of the present invention is shown. The range hood includes a housing 40 and a centrifugal fan disposed within the housing 40. The housing 40 generally includes a fan frame 41 and a fume hood 42 disposed at the bottom of the fan frame 41. The inner cavity of the fan frame 41 is connected to the inner cavity of the fume hood 42. An air inlet is provided on the front side wall of the fume hood 42, through which external smoke can enter the fume hood 42. The centrifugal fan is disposed within the fan frame 41. When the centrifugal fan is in operation, negative pressure is generated, and external oil smoke can be sucked into the fume hood 42 through the air inlet. An oil screen device is also provided at the air inlet of the fume hood 42 for filtering oil smoke. An oil cup 44 is provided at the bottom of the fume hood 42. The oil cup 44 is in the form of an elongated strip extending left and right, and is used to receive oil stains flowing down from the fume hood 42. The front portion of the smoke hood 42 is further provided with a smoke deflector 43 that can be pivoted forward and backward relative to the smoke hood 42. The smoke deflector 43 is connected to the main body of the smoke hood 42 via a hinge mechanism. Specifically, the smoke deflector 43 can be pivoted forward to open the aforementioned air inlet and pivoted backward to block and close the aforementioned air inlet. The hinge mechanism for pivoting the smoke deflector 43 can be a conventional hinge mechanism known in the art and will not be described in detail here.

[0036] In order to reasonably distribute the air volume on the left and right sides to match the user's cooking habits, the oil screen device of this embodiment is arranged at the air inlet of the range hood, specifically including a first oil screen assembly and a second oil screen assembly arranged in sequence along the air flow direction at the air inlet, as well as a movement mechanism. The first oil screen assembly includes a first oil screen 10, which has a first air inlet area 111 and a second air inlet area 112 arranged in sequence along a first direction and each having a first air inlet hole 100 distributed thereon. Figure 2As shown, the first air inlet area 111 and the second air inlet area 112 are arranged in the left-right direction. The first oil net 10 includes two sub-oil nets 11 arranged side by side on the left and right sides. The area where the two sub-oil nets 11 are located is the first air inlet area 111 and the second air inlet area 112 mentioned above. The outer edges of the two sub-oil nets 11 have a flange 110 folded backward. The second oil net assembly includes two movable oil nets 20 arranged in sequence along the left-right direction. The two movable oil nets 20 are respectively recorded as the first movable oil net 21 and the second movable oil net 22. The two movable oil nets 20 are respectively arranged on the rear sides of the two sub-oil nets 11 and are located within the range defined by the flange 110 of the corresponding sub-oil net 11. That is, one of the movable oil nets 20 is opposite to the first air inlet area 111 of the first oil net 10, and the other movable oil net 20 is opposite to the second air inlet area 112 of the first oil net 10. Second air inlet holes 200 are distributed on both movable oil nets 20. Specifically, the second air inlet holes 200 on the two movable oil nets 20 and the first air inlet holes 100 on the first oil net 10 are both strip holes extending along the second direction. The above-mentioned second direction is the width direction of the movable oil net 20, which is perpendicular to the above-mentioned first direction.

[0037] The two movable oil screens 20 and the two sub-oil screens 11 of the first oil screen 10 are all square. Each movable oil screen 20 has a first side 201 and a second side 202 that are opposite and parallel to the first direction. In this embodiment, the first side 201 and the second side 202 extend in the left-right direction. Two first fixing jackets 212 are provided on the first side 201 and the second side 202 of the first movable oil screen 21, spaced apart in the left-right direction. Similarly, two second fixing jackets 222 are provided on the first side 21 and the second side 22 of the second movable oil screen 22, spaced apart in the left-right direction.

[0038] A first mounting bracket is provided on the inner side of the flange 110 of the first air inlet area 111 of the first oil screen 10, in an area opposite the first fixing sleeve 212 on the first movable oil screen 21. This first mounting bracket is secured to the flange 110 of the first oil screen 10 via screws. Specifically, the first mounting bracket comprises two first mounting plates 131 spaced apart from each other. Opposing sidewalls of each first mounting plate 131 define first guide holes 1310. Left and right extending first guide rods 121 extend through the first guide holes 1310 of each first mounting plate 131. The first guide rods 121 extend outward for a distance through the first guide holes 1310 of each first mounting plate 131. Specifically, the first guide rods 121 can be studs with threads at both ends and a smooth center. The first guide rods 121 pass through the first guide holes 1310 of each first mounting plate 131 and are secured with nuts. The first fixing sleeve 212 is slidably mounted over the first guide rods 121. A first spring (also known as a first elastic member 141) is sheathed around the first guide rod 121. One end of the first spring abuts against one of the first mounting plates 131, and the other end abuts against the first fixing sleeve 212. Under the elastic force of the first spring, the first movable oil screen 21 always tends to move toward the location of the second movable oil screen 22. Similarly, a second mounting bracket is provided on the inner side of the flange 110 of the second air inlet region 112 of the first oil screen 10, in an area opposite the second fixed sleeve 222 on the second movable oil screen 22. This second mounting bracket is secured to the flange 110 of the first oil screen 10 via screws. Specifically, the second mounting bracket comprises two second mounting plates 132 spaced apart from each other. Opposing sidewalls of each second mounting plate 132 define second guide holes 1320. Second guide rods 122 extend left and right through the second guide holes 1320 of each second mounting plate 132. The ends of each second guide rod 122 extend outward for a distance through the second guide holes 1320 of each second mounting plate 132. Specifically, the second guide rod 122 can be a stud with threads at both ends and a smooth center. The second guide rod 122 passes through the second guide holes 1320 of each second mounting plate 132 and is secured with a nut. The first fixed sleeve 212 is slidably mounted over the first guide rod 121. A second spring (also known as a second elastic member 142) is sheathed around the second guide rod 122. One end of the second spring abuts against one of the second mounting plates 132, and the other end abuts against the second fixing sleeve 222. Under the elastic force of the second spring, the second movable oil screen 22 always tends to move away from the first movable oil screen 21.When the first movable oil screen 21 and the second movable oil screen 22 are in their natural state, that is, when they are moved to their extreme positions solely under the action of the first spring or the second spring, the second air inlet holes 200 on the first movable oil screen 21 are opposite the first air inlet holes 100 in the first air inlet section 111 of the first oil screen 10, indicating that the first air inlet section 111 of the first oil screen 10 is in a fully open state. The second air inlet holes 200 on the second movable oil screen 22 are also opposite the first air inlet holes 100 in the second air inlet section 112 of the first oil screen 10, indicating that the second air inlet section 112 of the first oil screen 10 is also in a fully open state. The arrangement of the springs and guide rods described above not only allows the movable oil screens to automatically return to their initial positions (i.e., the fully open state) when no pressure is applied by the corresponding swing arms, but also ensures the stability of the movable oil screens' movement relative to the first oil screen 10.

[0039] The motion mechanism of this embodiment includes a drive motor 31 and a swing arm mechanism drivingly connected to the output shaft of the drive motor 31. The swing arm mechanism includes a rotating shaft 32 and a swing arm 33 mounted on the rotating shaft 32 and capable of rotating with the rotating shaft 32. The drive motor is mounted on a U-shaped mounting bracket 34, which is mounted on an oil deflector 45 inside the fume hood 42. The oil deflector 45 is located below the air inlet area of the fume hood 42. This ensures that the installation of the drive motor and mounting bracket 34 does not affect the incoming air volume.

[0040] The drive motor 31 is connected to the rotating shaft 32 via a worm gear assembly, thereby driving the rotating shaft 32 to rotate in both the forward and reverse directions about its axis. The axis of rotation of the rotating shaft 32 is perpendicular to the plane in which the movable oil screen resides. One end of a swing arm 33 is connected to the rotating shaft 32, with the swing arm 33 extending parallel to the plane in which the movable oil screen resides. As the swing arm 33 rotates with the rotating shaft, it can selectively drive one of the two movable oil screens to move linearly in a first direction relative to the first oil screen 10, thereby changing the airflow state of the air inlet area on the side where the movable oil screen resides. Since the axis of the rotating shaft 32 for driving the swing arm 33 to rotate is perpendicular to the plane where the movable oil net is located, the force exerted by the swing arm 33 on the movable oil net is decomposed into a force that pushes the oil net forward and a force acting horizontally on the oil net (basically parallel to the plane where the oil net is located). Although this horizontal action will also produce a flipping torque, the oil net's resistance to flipping in the horizontal direction is much greater than that in the vertical direction. The influence of this force on the oil net is negligible relative to the strength of the oil net itself. Therefore, the way in which the motion mechanism of this embodiment acts on the oil net can ensure the stability of long-term motion and the reliability of the overall structure.

[0041] The first movable oil screen 21 is provided with a first vertical plate 211 on a side facing away from the first oil screen 10, perpendicular to the main body of the first movable oil screen 21. The second movable oil screen 22 is provided with a second vertical plate 221 on a side facing away from the first oil screen 10, perpendicular to the main body of the second movable oil screen 22. Both the first vertical plate 211 and the second vertical plate 221 extend into the range hood housing 40 and are positioned at adjacent side edges of the first and second movable oil screens, respectively. The main body of the swing arm is located on the side of the movable oil screen facing away from the first oil screen. The end of the swing arm has a drive pin extending toward the movable oil screen and extending between the first and second vertical plates. When the swing arm rotates forward and reverse with the shaft, the drive pin on the swing arm acts on the first and second vertical plates, respectively, thereby driving the first and second movable oil screens to move linearly.

[0042] When the swing arm 33 rotates forwardly along with the rotating shaft 32, the driving pin shaft 330 on the swing arm 33 applies a force to move sideways on the first vertical plate 211, thereby overcoming the elastic force of the first spring and moving along the A1 direction. During this process, the wall between the second air inlet holes 200 on the first movable oil net 21 can gradually block the first air inlet holes 100 of the first air inlet area 111 of the first oil net 10, until the first movable oil net 21 moves to the extreme position, and the first air inlet holes 100 of the first air inlet area 111 can be completely closed. Similarly, when the rotating shaft 32 rotates in the opposite direction, the driving pin shaft 330 on the swing arm 33 applies a force to the second vertical plate 221 to move sideways, thereby overcoming the elastic force of the second spring and moving along the A2 direction. During this process, the wall between the second air inlet holes 200 on the second movable oil net 22 can gradually block the first air inlet holes 100 of the second air inlet area 112 of the first oil net 10, until the second movable oil net 22 moves to the extreme position, and the first air inlet holes 100 of the second air inlet area 112 can be completely closed.

[0043] The first guide rod 121, first spring, and first fixing sleeve 212 constitute a guide module, of which four groups are provided, one at each of the four corners of the first movable oil screen 21. Similarly, the second guide rod 122, second spring, and second fixing sleeve 222 also constitute a guide module, of which four groups are provided, one at each of the four corners of the second movable oil screen 22.

[0044] The range hood of this embodiment also includes a status detection device for monitoring the cooking status on both sides. This status detection device can be an oil fume concentration sensor or a visual module capable of identifying the amount of oil fume. Both the status detection device and the motion mechanism's drive motor 31 are electrically connected to the range hood's controller. Based on the cooking status signal transmitted by the status detection device, the controller controls the drive motor 31 to rotate forward or reverse, thereby moving the corresponding movable oil screen.

Claims

1. An oil net device, arranged at the air inlet of a range hood, comprising a first oil net assembly and a second oil net assembly arranged in sequence along the air flow direction at the air inlet, wherein the first oil net assembly comprises a first oil net (10), the first oil net (10) having a first air inlet area (111) and a second air inlet area (112) arranged in sequence along a first direction and both having first air inlet holes (100), the second oil net assembly comprises two movable oil nets arranged in sequence along the first direction, both having second air inlet holes (200), one of the movable oil nets being opposite to the first air inlet area (111) of the first oil net (10), and the other movable oil net being opposite to the second air inlet area (112) of the first oil net (10), characterized in that: The invention also includes a motion mechanism, which includes a driving motor (31) and a swing arm (33) mechanism connected to the output shaft of the driving motor (31), the swing arm (33) mechanism including a rotating shaft (32) and a swing arm (33) installed on the rotating shaft (32) and capable of rotating with the rotating shaft (32), the rotating shaft (32) is connected to the output shaft of the driving motor (31) and can rotate around its own axis, the axis of the rotating shaft (32) is perpendicular to the plane where the movable oil net is located, and the swing arm (33) can selectively drive one of the two movable oil nets to move linearly in a first direction relative to the first oil net (10) during the process of rotating with the rotating shaft (32), thereby changing the air intake state of the air intake area on the side where the movable oil net is located.

2. The oil screen device according to claim 1, characterized in that: The one of the two movable oil nets opposite to the first air inlet area (111) of the first oil net (10) is recorded as the first movable oil net (21), and the one opposite to the second air inlet area (112) of the first oil net (10) is recorded as the second movable oil net (22). The first movable oil net (21) is provided with a first vertical plate (211) perpendicular to the main body of the first movable oil net (21) on the side away from the first oil net (10). The second movable oil net (22) is provided with a first vertical plate (211) perpendicular to the main body of the first movable oil net (21) on the side away from the first oil net (10). A second vertical plate (221) perpendicular to the main body of the second movable oil net (22) is provided on one side, and the swing arm (33) can abut against the first vertical plate (211) during the rotation process of the rotating shaft (32), thereby driving the first movable oil net (21) away from the second movable oil net (22); the swing arm (33) can abut against the second vertical plate (221) during the rotation process of the rotating shaft (32), thereby driving the second movable oil net (22) away from the first movable oil net (21).

3. The oil screen device according to claim 2, characterized in that: The first vertical plate (211) and the second vertical plate (221) are correspondingly arranged at a pair of side edge positions adjacent to the first movable oil net (21) and the second movable oil net (22); the swing arm (33) is located between the first movable oil net (21) and the second movable oil net (22), and can act on the first vertical plate (211) and the second vertical plate (221) respectively when rotating in the forward and reverse directions along with the rotating shaft (32).

4. The oil screen device according to claim 3, characterized in that: The main body of the swing arm (33) is located on a side of the movable oil net away from the first oil net (10), and the end of the swing arm (33) has a driving pin shaft (330) extending toward the movable oil net and extending into between the first vertical plate (211) and the second vertical plate (221).

5. The oil screen device according to claim 1, characterized in that: The two movable oil nets have at least a first state and a second state as their relative positions relative to the first oil net (10) change: In the first state, the second air inlet hole (200) on the movable oil net is opposite to the first air inlet hole (100) corresponding to the air inlet area on the first oil net (10); In the second state, the second air inlet holes (200) on the movable oil net are staggered with the first air inlet holes (100) corresponding to the air inlet area on the first oil net (10), that is, the wall between the adjacent second air inlet holes (200) on the movable oil net blocks at least a portion of the first air inlet holes (100) on the air inlet area of the first oil net (10).

6. The oil screen device according to any one of claims 1 to 5, characterized in that: Of the two movable oil nets, one opposite to the first air inlet area (111) of the first oil net (10) is recorded as a first movable oil net (21), and one opposite to the second air inlet area (112) of the first oil net (10) is recorded as a second movable oil net (22). The oil net device further comprises: A first elastic member (141) acts on the first movable oil net (21) and causes the first movable oil net (21) to always have a tendency to remain in the first state; The second elastic member (142) acts on the second movable oil net (22) and makes the second movable oil net (22) always have a tendency to remain in the first state.

7. The oil screen device according to claim 6, characterized in that: A first guide rod (121) extending in a first direction is provided at the first air inlet area (111) of the first oil net (10); the first elastic member (141) is a first spring sleeved on the first guide rod (121); a first fixing sleeve (212) sleeved outside the first guide rod (121) is further provided at the side of the first movable oil net (21); the first fixing sleeve (212) abuts against the end of the first spring; A second guide rod (122) extending along the first direction is provided at the second air inlet area (112) of the first oil net (10), and the second elastic member (142) is a second spring sleeved on the second guide rod (122). A second fixed sleeve (222) sleeved outside the second guide rod (122) is also provided at the side of the second movable oil net (22), and the second fixed sleeve (222) is abutted against the end of the second spring.

8. The oil screen device according to claim 7, characterized in that: A first mounting frame is provided at the first air inlet area (111) of the first oil screen (10), and the first mounting frame has two first mounting plates (131) spaced apart along a first direction, and first guide holes (1310) are provided on the two first mounting plates (131), and the first guide rod (121) is slidably inserted into the first guide holes (1310) of the two first mounting plates (131); A second mounting frame is provided at the second air inlet area (112) of the first oil net (10), and the second mounting frame has two second mounting plates (132) spaced apart along the first direction, and second guide holes (1320) are provided on the two second mounting plates (132). The second guide rod (122) can be slidably inserted into the second guide holes (1320) of the two second mounting plates (132).

9. The oil screen device according to claim 7, characterized in that: The first movable oil net (21) and the second movable oil net (22) both have a first side (201) and a second side (202) that are opposite and parallel to the first direction; the first side (201) and the second side (202) of the first movable oil net (21) are both provided with the first fixing sleeve (212); the first side (201) and the second side (202) of the second movable oil net (22) are both provided with the second fixing sleeve (222).

10. A range hood, comprising a housing (40), an air inlet being provided on the housing (40), an oil net being provided at the air inlet, and characterized in that: The oil net adopts the oil net device according to any one of claims 1 to 9.

11. The range hood according to claim 10, characterized in that: The range hood also includes a state detection device for detecting the cooking state on the left and right sides. The state detection device and the drive motor (31) of the motion mechanism are electrically connected to the controller of the range hood. The controller can control the drive motor (31) to move according to the cooking state signal transmitted by the state detection device, thereby driving the corresponding movable oil net to move and change the air intake state of the air intake area on the side where the movable oil net is located.

12. The range hood according to claim 10, characterized in that: The two movable oil screens are sequentially arranged along the left and right directions, and the installation position of the drive motor (31) is located on the upper side or the lower side of the area where the air inlet of the housing (40) is located.

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