Oil screen device and range hood

Abstract

The oil screen device is arranged at an air inlet of the range hood and comprises a first oil screen assembly and a second oil screen assembly which are sequentially arranged in the airflow direction of the air inlet, the first oil screen assembly comprises a first oil screen, and the first oil screen is provided with a first air inlet area and a second air inlet area. The second oil screen assembly comprises two movable oil screens sequentially arranged in the first direction and further comprises a movement mechanism, the movement mechanism comprises a driving motor and an incomplete gear transmission assembly in transmission connection with an output shaft of the driving motor, and the power output end of the incomplete gear transmission assembly is connected with the two movable oil screens. And one of the two movable oil nets can be selectively driven to linearly move relative to the first oil net in the first direction, so that 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 can reasonably distribute the air inlet quantity on the left side and the right side so as to be matched with the cooking condition of a user.

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 for purifying the kitchen environment. Existing range hoods usually include a casing and a fan system arranged in the casing, an air inlet is provided on the casing, and an oil net for filtering oil smoke is provided at the air inlet. For example, Chinese invention patent with application number 202010058463.9 discloses a range hood, including a front plate, a sound absorbing part arranged opposite to the front plate, a rear plate connected to the front plate and constituting a receiving cavity, the receiving cavity is suitable for accommodating the sound absorbing part, at least one of the front plate and the rear plate is provided with a plurality of connecting parts protruding in a direction away from the other of the front plate and the rear plate, the range hood also includes a smoke collecting hood, the smoke collecting hood includes a smoke collecting hood body, an air inlet is provided on the smoke collecting hood body, and an oil net is fixedly connected to the smoke collecting hood body, and the oil net is suitable for shielding the air inlet.

[0003] The oil nets of existing range hoods are mostly fixed integrated nets. When most household users cook, they often only open one side of the stove and close the other side, or there are differences in the cooking conditions on the two sides, such as stir-frying on one side and boiling soup on the other side. This will cause the amount of oil smoke generated on both sides of the stove to be inconsistent. The existing range hoods cannot adjust the air volume on the left and right sides according to the usage of the stove, so as to match the user's cooking conditions.

[0004] Therefore, the oil net device of the existing range hood needs to be further improved. Utility Model Content

[0005] The first technical problem to be solved by the utility model is to provide an oil net device which can reasonably distribute the air volume on the left and right sides to match the cooking conditions of the user in view of the current status of the prior art.

[0006] 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 prior art.

[0007] The technical solution adopted by the utility model to solve the first technical problem is: an oil net device, 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 including a first oil net, the first oil net having a first air inlet area and a second air inlet area arranged in sequence along the first direction and both having first air inlet holes, the second oil net assembly including two movable oil nets arranged in sequence along the first direction, both having second air inlet holes, one of the movable oil nets being opposite to the first air inlet area of ​​the first oil net, and the other movable oil net being opposite to the second air inlet area of ​​the first oil net, and also including a motion mechanism, the motion mechanism including a driving motor and a non-complete gear transmission assembly connected to the output shaft of the driving motor, the power output end of the non-complete gear transmission assembly being connected to the two movable oil nets, and being able to selectively drive one of the two movable oil nets to move linearly relative to the first oil net in the first direction, thereby changing the air inlet state of the air inlet area on the side where the movable oil net is located.

[0008] The above-mentioned change of "air intake state" can be understood as a change in the air intake volume or a change in the position of the air intake area, etc.

[0009] In order to simplify the structure of the incomplete gear transmission assembly, the two movable oil nets are respectively recorded as a first movable oil net and a second movable oil net. The incomplete gear transmission assembly includes:

[0010] A first gear rack transmission assembly comprises a first gear and a first rack, wherein the first rack is disposed on the first movable oil net and extends along a first direction, and the first gear is meshed with the first rack;

[0011] A second gear rack transmission assembly comprises a second gear and a second rack, wherein the second rack is disposed on the second movable oil net and extends along the first direction, and the second gear is meshed with the second rack;

[0012] An incomplete gear is drivingly connected to the output shaft of the driving motor and can rotate forward or reversely under the drive of the driving motor;

[0013] During the rotation of the incomplete gear, the transmission teeth of the incomplete gear can be selectively connected to one of the first gear and the second gear.

[0014] In order to rationally utilize the installation space and ensure that the two movable oil nets can move toward the same side when moving, the incomplete gear transmission assembly also includes a reversing gear meshing with the second gear, and the transmission teeth of the incomplete gear can selectively mesh with the first gear and the reversing gear as the incomplete gear rotates.

[0015] In order to ensure the stability of power transmission and the accuracy of movement and adjustment of the movable oil net, the output shaft of the drive motor is connected to the incomplete gear transmission through a worm gear assembly.

[0016] In order to facilitate the motion mechanism to transmit power to the two movable oil nets, the first rack and the second rack are correspondingly arranged at the side edges of the two movable oil nets that are close to each other.

[0017] In order to reduce the oil pollution of the moving mechanism and increase its service life, a protective shell covering the outside of the moving mechanism is also included.

[0018] As an improvement, 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 change:

[0019] In the first state, the second air inlet holes on the movable oil net are opposite to the first air inlet holes in the corresponding air inlet area on the first oil net;

[0020] In the first 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.

[0021] As an improvement, in order to facilitate the installation of the oil net assembly, the first oil net includes two sub-oil nets arranged side by side along the first direction, and the area where the two sub-oil nets are located is the first air inlet area and the second air inlet area. It is conceivable that the first oil net can also be an integrated oil net structure, which is divided into the corresponding first air inlet area and the second air inlet area as a whole.

[0022] In order to ensure the stability of the movement of the movable oil net relative to the first oil net and avoid the deviation problem, the outer peripheral edge of the first oil net has a flange folded toward the side where the movable oil net is located, and the movable oil net has a first side and a second side opposite to each other and parallel to the first direction, and the first side of the movable oil net is provided with at least one first roller that can roll with the inner side of the flange of the first oil net, and the second side of the movable oil net is provided with at least one second roller that can roll with the inner side of the flange of the first oil net.

[0023] In order to prevent the movable oil net from falling off relative to the first oil net and further ensure the stability of the movable oil net in moving relative to the first oil net, the inner side of the flange of the first oil net is provided with a first limiting groove extending along the first direction in an area corresponding to the first roller on the movable oil net, and the inner side of the flange of the first oil net is provided with a second limiting groove extending along the first direction in an area corresponding to the second roller on the movable oil net, and the second limiting groove extending along the first direction in an area corresponding to the second roller on the movable oil net. In the corresponding limiting grooves provided on the first oil net, the first oil net and the movable oil net can form an oil net unit module, which is convenient for the disassembly and installation of the oil net device.

[0024] In order to better adapt to the air volume adjustment method of changing the air volume through the relative movement of the oil nets, the two movable oil nets are arranged in sequence along the left and right directions, and the first air inlet hole on the first oil net and the second air inlet holes on the two movable oil nets are both strip holes extending along the second direction, and the second direction is perpendicular to the first direction. It is conceivable that the first air inlet hole on the first oil net and the second air inlet hole on the movable oil net can also adopt a circular hole, a diamond hole or other structures.

[0025] The technical solution adopted by the utility model 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 arranged at the air inlet, and the characteristic is that the oil net adopts the above-mentioned oil net device.

[0026] Compared with the prior art, the advantages of the utility model are as follows: the motion mechanism includes a driving motor and a non-complete gear transmission assembly connected to the output shaft of the driving motor, the power output end of the non-complete gear transmission assembly is connected to two movable oil nets, and can selectively drive one of the two movable oil nets to move linearly relative to the first oil net in the first direction, thereby changing the air intake state of the air intake area on the side where the movable oil net is located, that is, it can drive the movable oil nets on different sides to move by intermittent motion, thereby realizing the flow distribution of the smoke inlets on both sides. In the preferred embodiment, a roller structure is also provided between the first oil net and the movable oil net, so that the movable oil net will not be offset or flipped when it is translated relative to the first oil net, thereby ensuring the stability of the movement of the movable oil net. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a three-dimensional structural diagram of the oil net device of the embodiment of the utility model (the protective shell is omitted);

[0028] Figure 2 A top view of the oil screen device according to an embodiment of the utility model;

[0029] Figure 3 This is a rear view of the oil screen device according to an embodiment of the utility model;

[0030] Figure 4 It is a front view of the oil screen device of the embodiment of the utility model (the second air inlet hole on the movable oil screen on the right side and the first air inlet hole in the second air inlet area of ​​the first oil screen are in a staggered arrangement state);

[0031] Figure 5 It is a front view of the oil net device of the embodiment of the utility model (the second air inlet hole on the movable oil net on the left and the first air inlet hole in the first air inlet area of ​​the first oil net are in a staggered arrangement state);

[0032] Figure 6 This is a three-dimensional structural diagram of the oil net device of an embodiment of the utility model (with a protective shell);

[0033] Figure 7 It is a schematic diagram of the three-dimensional structure of the range hood according to the embodiment of the utility model. DETAILED DESCRIPTION

[0034] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0035] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0036] Figure 1-Figure 7The oil net device of the utility model and a preferred embodiment of a range hood using the oil net device are shown. The range hood includes a housing 40 and a centrifugal fan arranged in the housing 40. The housing 40 generally includes a fan frame 41 and a fume hood 42 arranged at the bottom of the fan frame 41. The inner cavity of the fan frame 41 is connected with the inner cavity of the fume hood 42. An air inlet is provided on the front side wall of the fume hood 42, and external smoke can enter the fume hood 42 through the air inlet. The centrifugal fan is arranged in the fan frame 41. When the centrifugal fan is running, negative pressure is generated, and external oil smoke can be sucked into the fume hood 42 through the air inlet. An oil net device 1 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 shape of a long strip extending left and right, and is used to receive oil stains flowing down from the fume hood 42. The front part of the smoke hood 42 is also provided with a smoke shield 43 that can be deflected forward and backward relative to the smoke hood 42. The smoke shield 43 is connected to the main body of the smoke hood 42 through a hinge motion mechanism, and can be deflected forward to open the above-mentioned air inlet and deflected backward to block and close the above-mentioned air inlet. The hinge motion mechanism used to drive the deflection of the smoke shield 43 can adopt a conventional hinge motion mechanism in the prior art, which will not be described in detail here.

[0037] In order to reasonably distribute the air volume on the left and right sides to match the user's cooking situation, the oil net device of this embodiment is arranged at the air inlet of the range hood, and specifically includes a first oil net assembly and a second oil net assembly and a motion mechanism arranged in sequence along the air flow direction at the air inlet. The first oil net assembly includes a first oil net 10, and the first oil net 10 has a first air inlet area 111 and a second air inlet area 112 arranged in sequence along the first direction A1 and distributed with first air inlet holes 100, such as Figure 4 As shown, the first air inlet area 111 and the second air inlet area 112 are arranged in sequence along 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, and the area where the two sub-oil nets 11 are located is the above-mentioned first air inlet area 111 and the second air inlet area 112. The outer peripheral edges of the two sub-oil nets 11 have a flange 110 folded backwards, and the second oil net assembly includes two movable oil nets 20 arranged in sequence along the left-right direction, and the two movable oil nets 20 are respectively recorded as the first movable oil net 201 and the second movable oil net 202. The two movable oil nets 20 are correspondingly arranged on the rear side 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. The two movable oil nets 20 are both provided with second air inlet holes 200. Specifically, the second air inlet holes 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 A2. Figure 3As shown, the second direction A2 is the width direction of the movable oil net 20 , that is, perpendicular to the first direction A1 .

[0038] See also Figure 6 The two movable oil nets 20 and the two sub-oil nets 11 of the first oil net 10 are all square nets. The two movable oil nets 20 have a first side 21 and a second side 22 that are opposite and parallel to the first direction A1. Two first rollers 231 are arranged at intervals along the left and right directions on the first side 21 of the movable oil net 20. The inner side of the flange 110 of the first oil net 10 is also provided with a first limiting groove 1101 extending along the first direction A1 in the area corresponding to the first roller 231 on the movable oil net 20. The roller of the movable oil net 20 is slidably limited in the first limiting groove 1101. Similarly, two second rollers 232 are arranged at intervals along the left-right direction on the second side 22 of the movable oil net 20. A second limiting groove 1102 is also arranged extending along the first direction A1 in the inner side of the flange 110 of the first oil net 10 in the area corresponding to the second roller 232 on the movable oil net 20. The second roller 232 of the movable oil net 20 is slidably limited in the second limiting groove 1102. The cooperation between the above rollers and the limiting grooves ensures the stability of the movable oil net 20 moving relative to the first oil net 10, avoiding the problem of offset. On the other hand, since the two opposite sides of the movable oil net 20 are limited in the corresponding limiting grooves on the first oil net 10 by the corresponding rollers, the movable oil net 20 and the sub-oil net 11 will not be easily separated in the front-back direction. The sub-oil net 11 and the movable oil net 20 can form an oil net unit module, which is convenient for the disassembly and installation of the oil net device.

[0039] Continue to see Figure 1The motion mechanism of this embodiment includes a driving motor 31 and a non-complete gear transmission assembly connected to the output shaft of the driving motor 31. The power output end of the non-complete gear transmission assembly is connected to the two movable oil nets 20, and can selectively drive one of the two movable oil nets 20 to move linearly relative to the first oil net 10 in the first direction A1, thereby changing the air intake state of the air intake area on the side where the movable oil net 20 is located. Specifically, the non-complete gear transmission assembly includes a first gear rack transmission assembly, a second gear rack transmission assembly, an incomplete gear 32 and a reversing gear 33. The first gear rack transmission assembly includes a first gear 34 and a first rack 35. The first gear 34 can be rotatably arranged on the fixed bracket 381 through a gear shaft, and the first gear 34 is meshed with the first rack 35. The first rack 35 is arranged on the back of the first movable oil net 201 and is arranged adjacent to its first side 21. The first rack 35 is extended and arranged in the left and right directions. Similarly, the second gear rack transmission assembly includes a second gear 36 and a second rack 37. The second gear 36 is also rotatably disposed on the fixed bracket 381 via a gear shaft. The second gear 36 meshes with the second rack 37. The second rack 37 is disposed on the back of the second movable oil net 202 and is disposed adjacent to the first side 21 thereof. The second rack 37 is arranged to extend in the left-right direction. Figure 1 The first rack 35 on the first movable oil net 201 and the second rack 37 on the second movable oil net 202 are arranged adjacent to each other, so that it is convenient for the drive motor 31 to transmit power to both through the corresponding gear transmission mechanism. The incomplete gear 32 and the reversing gear 33 are also rotatably arranged on the fixed bracket 381 through the corresponding gear shafts. The main body of the incomplete gear 32 has a section of transmission teeth 320 arranged along the circumferential direction. The output shaft of the drive motor 31 is connected to the incomplete gear 32 through the worm gear transmission assembly 39. The reversing gear 33 is meshed with the second gear 36. The incomplete gear 32 can rotate forward or reversely under the drive of the drive motor 31, and during the rotation of the incomplete gear 32, its transmission teeth 320 can be selectively connected to one of the first gear 34 and the reversing gear 33. Among them, driven by the driving motor 31, the movable oil net 20 has at least a first state and a second state as its relative position relative to the first oil net 10 changes: in the first state, the second air inlet holes 200 on the movable oil net 20 are opposite to the first air inlet holes 100 in the corresponding air inlet area on the first oil net 10; in the first state, the second air inlet holes 200 on the movable oil net 20 are staggered with the first air inlet holes 100 in the corresponding air inlet area on the first oil net 10, that is, the wall between adjacent second air inlet holes 200 on the movable oil net 20 blocks at least a portion of the first air inlet holes 100 in the air inlet area on the first oil net 10.

[0040] A protective shell 38 is provided outside the motion mechanism, and the protective shell 38 includes a sealed front cover and a sealed rear cover that are buckled together. The sealed front cover and the sealed rear cover can be connected by screws, and the sealed rear cover is installed on the inclined surface of the oil guide plate in the housing 40 of the range hood by screws. The protective shell 38 can seal the motion mechanism to prevent the erosion of pollutants such as oil smoke.

[0041] The working process of the oil screen device of this embodiment is as follows:

[0042] 1. The range hood is turned on, the smoke baffle 43 is opened, the air intake state of the first oil net 10 and the two movable oil nets 20 of the oil net device is initially fully open, the drive motor 31 rotates forward, and the power is transmitted step by step to the main rotating shaft, driving the incomplete gear 32 to rotate.

[0043] 2. The incomplete gear 32 rotates forward and meshes with the first gear 34 of the rack transmission assembly of the first gear 34 on the left, driving the first gear 34 to rotate. The first gear 34 meshes with the first rack 35, and the first rack 35 drives the movable oil net 20 on the left to move to the left. During the gradual movement of the movable oil net 20 on the left to the left, the wall between the second air inlet holes 200 of the movable oil net 20 on the left gradually blocks the first air inlet hole 100 of the first air inlet area 111 of the first oil net 10, that is, the continuous rotation of the driving motor 31 ensures that the movable oil net 20 continues to move in the direction of reducing the mesh size of the first air inlet area 111 of the first oil net 10, until the mesh size on this side is completely closed, and the driving motor 31 stops moving.

[0044] When the driving motor 31 rotates forward, the second air inlet area 112 on the right side of the first oil net 10 is fully opened, and the first air inlet area 111 on the left side is opened to any state from 0 to 100%, including the mesh of the first air inlet area 111 on the left side is half opened, the mesh of the first air inlet area 111 on the left side is completely closed, and the like.

[0045] The reverse rotation of the driving motor 31 is similar. The air inlet state of the first oil net 10 and the two movable oil nets 20 of the oil net device is initially fully open. The driving motor 31 is reversed, and the second movable oil net 202 on the right moves to the left. The movable oil net 20 on the right continues to move in the direction of reducing the mesh size of the second air inlet area 112 of the first oil net 10 until the mesh size on this side is completely closed, and the driving motor 31 stops moving. In this moving state, the first air inlet area 111 on the left side of the first oil net 10 is fully open, and the second air inlet area 112 on the right side is opened to any state from 0 to 100%, including the mesh size of the second air inlet area 112 on the right side is half open, and the mesh size of the second air inlet area 112 on the right side is completely closed.

[0046] It can be seen from the above working process that by using the incomplete gear 32 as the active gear and changing the forward and reverse rotation of the driving motor 31, it can be ensured that the movable oil net 20 on one side moves relatively and the movable oil net 20 on the other side remains stationary, thereby making the air inlet areas on both sides of the range hood different and achieving the effect of flow distribution. In particular, through the incomplete gear, it is possible to achieve a variety of working conditions such as the full opening of the air inlet area on one side of the oil net device and the 0-100% opening of the air inlet area on the other side, thereby adapting to the scene where the cooking conditions on both sides are inconsistent and improving the user's cooking experience.

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, the first oil net assembly comprising 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 (A1) and both having first air inlet holes (100), the second oil net assembly comprising two movable oil nets (20) arranged in sequence along the first direction (A1), both having second air inlet holes (200), one of the movable oil nets (20) being opposite to the first air inlet area (111) of the first oil net (10), and the other movable oil net (20) being opposite to the second air inlet area (112) of the first oil net (10), characterized in that: The invention also comprises a motion mechanism, which comprises a driving motor (31) and a non-complete gear transmission component which is connected to the output shaft of the driving motor (31); the power output end of the non-complete gear transmission component is connected to two movable oil nets (20), and can selectively drive one of the two movable oil nets (20) to move linearly in a first direction (A1) relative to the first oil net (10), thereby changing the air intake state of the air intake area on the side where the movable oil net (20) is located.

2. The oil screen device according to claim 1, characterized in that: The two movable oil nets (20) are respectively referred to as a first movable oil net (201) and a second movable oil net (202), and the non-complete gear transmission assembly comprises: A first gear rack transmission assembly, comprising a first gear (34) and a first rack (35), wherein the first rack (35) is disposed on the first movable oil net (201) and extends along a first direction (A1), and the first gear (34) is meshed with the first rack (35); A second gear rack transmission assembly, comprising a second gear (36) and a second rack (37), wherein the second rack (37) is disposed on the second movable oil net (202) and extends along a first direction (A1), and the second gear (36) is meshed with the second rack (37); An incomplete gear (32) is drivingly connected to the output shaft of the driving motor (31) and can rotate forward or reverse under the drive of the driving motor (31); During the rotation of the incomplete gear (32), the transmission teeth (320) of the incomplete gear (32) can be selectively connected to one of the first gear (34) and the second gear (36).

3. The oil screen device according to claim 2, characterized in that: The incomplete gear transmission assembly further comprises a reversing gear (33) meshing with the second gear (36), and the transmission teeth (320) of the incomplete gear (32) can selectively mesh with the first gear (34) and the reversing gear (33) as the incomplete gear (32) rotates.

4. The oil screen device according to claim 2, characterized in that: The output shaft of the driving motor (31) is drivingly connected to the incomplete gear (32) via a worm gear assembly (39).

5. The oil screen device according to claim 2, characterized in that: The first rack (35) and the second rack (37) are correspondingly arranged at the side edges of the two movable oil nets (20) that are close to each other.

6. The oil screen device according to claim 1, characterized in that: It also includes a protective shell (38) which is arranged outside the movement mechanism.

7. The oil screen device according to claim 1, characterized in that: The two movable oil nets (20) 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 (20) is opposite to the first air inlet hole (100) on the first oil net (10) corresponding to the air inlet area; In the first state, the second air inlet holes (200) on the movable oil net (20) are arranged in a staggered manner with the first air inlet holes (100) on the first oil net (10) corresponding to the air inlet area, that is, the wall between adjacent second air inlet holes (200) on the movable oil net (20) blocks at least a portion of the first air inlet holes (100) on the first oil net (10) in the air inlet area.

8. The oil screen device according to any one of claims 1 to 7, characterized in that: The first oil net (10) comprises two sub-oil nets (11) arranged side by side along a first direction (A1), and the areas where the two sub-oil nets (11) are located are the first air inlet area (111) and the second air inlet area (112).

9. The oil screen device according to any one of claims 1 to 7, characterized in that: The first oil net (10) has a flange (110) at its outer peripheral edge which is folded toward the side where the movable oil net (20) is located. The movable oil net (20) has a first side (21) and a second side (22) which are opposite to each other and parallel to the first direction (A1). The first side (21) of the movable oil net (20) is provided with at least one first roller (231) which can roll in contact with the inner side of the flange (110) of the first oil net (10). The second side (22) of the movable oil net (20) is provided with at least one second roller (232) which can roll in contact with the inner side of the flange (110) of the first oil net (10).

10. The oil screen device according to claim 9, characterized in that: A first limiting groove (1101) extending along a first direction (A1) and allowing the first roller (231) to slide and limit position therein is further provided on the inner side of the flange (110) of the first oil net (10) in an area corresponding to the first roller (231) on the movable oil net (20); A second limiting groove (1102) extending along the first direction (A1) and allowing the second roller (232) to slide and limit therein is also provided on the inner side of the flange (110) of the first oil net (10) in an area corresponding to the second roller (232) on the movable oil net (20).

11. The oil screen device according to any one of claims 1 to 7, characterized in that: The two movable oil nets (20) are arranged in sequence along the left-right direction, and the first air inlet hole (100) on the first oil net (10) and the second air inlet holes (200) on the two movable oil nets (20) are both strip holes extending along the second direction (A2), and the second direction (A2) is perpendicular to the first direction (A1).

12. 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, characterized in that: The oil net adopts the oil net device according to any one of claims 1 to 11.

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