Oil screen device and range hood

Abstract

The oil screen device comprises a first oil screen assembly and a second oil screen assembly which are sequentially arranged in the airflow direction of an 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, the moving mechanism comprises a driving motor and a swing arm mechanism, the swing arm mechanism comprises a rotating shaft, a first swing arm and a second swing arm, and the first swing arm and the second swing arm are arranged on the rotating shaft at intervals in the circumferential direction; the rotating shaft is in transmission connection with an output shaft of the driving motor and can rotate around the axis of the rotating shaft, the first swing arm and the second 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 device has the advantages that the air inlet volume on the left side and the right side can be reasonably distributed 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, existing range hoods need further improvement. 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 utility model 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 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, the first oil net has a first air inlet area and a second air inlet area arranged in sequence along a first direction and both having first air inlet holes, the second oil net assembly includes two movable oil nets arranged in sequence along the first direction, the two movable oil nets are both having 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 net is opposite to the second air inlet area of ​​the first oil net, 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 first swing arm and a second swing arm that are circumferentially spaced on the rotating shaft and can rotate 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 first swing arm and the second swing arm can selectively drive one of the two active oil nets to move linearly in a 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 active 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] The utility model can control the forward and reverse rotation of the driving motor so that the first swing arm and the second swing arm can selectively contact the corresponding movable oil nets, thereby respectively pushing the two movable oil nets to perform translational motion relative to the first oil net, thereby 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 through intermittent motion, thereby realizing flow distribution of the smoke inlets on both sides.

[0010] In order to adapt to the first swing arm and the second swing arm, 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 rod 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 rod perpendicular to the main body of the second movable oil net on the side away from the first oil net. The first swing arm can resist the first vertical rod during the rotation with the rotating shaft, thereby driving the first movable oil net to move relative to the first oil net, and the second swing arm can resist the second vertical rod during the rotation with the rotating shaft, thereby driving the second movable oil net to move relative to the first oil net.

[0011] Taking into account that the corresponding vertical rods on the two movable oil nets are mostly concentrated at the side edge positions, in order to reasonably arrange the first swing arm and the second swing arm in space, the first swing arm and the second swing arm are arranged in sequence along the axial direction of the rotating shaft, and the free end of the first swing arm also has a first driving rod whose extension direction is perpendicular to the main body of the first swing arm, and the free end of the second swing arm also has a second driving rod whose extension direction is perpendicular to the main body of the second swing arm. When the first swing arm rotates with the rotating shaft, its first driving rod can be against the first vertical rod to drive the first movable oil net to move relative to the first oil net. When the second swing arm rotates with the rotating shaft, its second driving rod can be against the second vertical rod to drive the second movable oil net to move relative to the first oil net.

[0012] In order to reasonably utilize the installation space and ensure that the two movable oil nets can move toward the same side when moving, when the first swing arm rotates with the rotating shaft, the first driving rod of the first swing arm acts on the side of the first vertical rod facing the position of the rotating shaft, thereby driving the first movable oil net to move in a direction away from the rotating shaft;

[0013] When the second swing arm rotates with the rotating shaft, the second driving rod of the second swing arm acts on the side of the second vertical rod away from the rotating shaft, thereby driving the second movable oil net to move in a direction close to the rotating shaft.

[0014] Taking into account the interference problem caused by the first and second vertical poles being too long, the first and second vertical poles are as short as possible. To match this and ensure that the first swing arm and the second swing arm can act on the opposite sides of the corresponding vertical poles during the action, the top of the first vertical pole has a first guide portion extending obliquely from bottom to top toward the side away from the rotating shaft, and the top of the second vertical pole has a second guide portion extending obliquely from bottom to top toward the side close to the rotating shaft.

[0015] 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:

[0016] 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;

[0017] 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.

[0018] In order to enable the movable oil net to automatically return to the initial position (i.e., the fully opened state) when no pressure is applied by the corresponding swing arm, 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 other opposite to the second air inlet area of ​​the first oil net is recorded as the second movable oil net. The oil net device further includes:

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

[0020] 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.

[0021] 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 column extending along a first direction is provided at the first air inlet area of ​​the first oil net, and the first elastic member is a first spring sleeved on the first guide column. A first fixing jacket sleeved outside the first guide column is also provided at the side of the first movable oil net, and the first fixing jacket abuts against the end of the first spring.

[0022] A second guide column 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 column. A second fixing sleeve sleeved outside the second guide column is also provided at the side of the second movable oil net, and the second fixing sleeve is abutted against the end of the second spring.

[0023] The arrangement of the guide column also ensures the stability of the movement of the movable oil net relative to the first oil net.

[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, the first side and the second side of the first movable oil net are both provided with the first fixing sleeve, and the first side and the second side of the second movable oil net are both provided with the second fixing sleeve.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] In order to realize automatic adjustment of the air intake state of the oil net device according to the cooking conditions, it also includes a state detection device for detecting the cooking states on the left and right sides. The state 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 state signal transmitted by the state detection device, thereby driving the corresponding active oil net to move and change the air intake state of the air intake area on the side where the active oil net is located.

[0029] Compared with the prior art, the utility model has the following advantages:

[0030] 1. By controlling the forward and reverse rotation of the driving motor, the first swing arm and the second swing arm can selectively contact the corresponding movable oil net, thereby pushing the two movable oil nets to make translational motion relative to the first oil net, changing the air intake state of the air intake area on this side, that is, the movable oil nets on different sides can be driven to move in an intermittent motion manner, thereby realizing the flow distribution of the smoke inlets on both sides.

[0031] 2. The entire movement mechanism of the oil screen device is simple without complex transmission structure. The air inlet is closed by the corresponding swing arm and opened by the return spring. The working mode is easy to realize.

[0032] 3. The existence of the guide column and the spring between the movable oil net and the first oil net makes the reciprocating motion of the movable oil net smoother, preventing problems such as jamming and offset.

[0033] 5. The movement mechanism of the oil net device of the range hood, the cooking state detection device and the controller of the range hood are electrically connected to realize automatic flow distribution according to the cooking state (such as the concentration of oil smoke) on both sides. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the three-dimensional structure of the oil net device of an embodiment of the utility model;

[0035] Figure 2A bottom view of the oil screen device according to an embodiment of the utility model;

[0036] Figure 3 It is a schematic diagram of the three-dimensional structure of the range hood according to an embodiment of the utility model. DETAILED DESCRIPTION

[0037] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0038] 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.

[0039] Figure 1-Figure 3 A preferred embodiment of the oil net device and the range hood of the utility model is 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 the 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.

[0040] 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 10 component and a second oil net component and a motion mechanism arranged in sequence along the air flow direction at the air inlet. The first oil net 10 component 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 a first direction and distributed with first air inlet holes 100, such as Figure 1 As 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, 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 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 21 and the second movable oil net 22. 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 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.

[0041] The two movable oil nets 20 and the two sub-oil nets 11 of the first oil net 10 are both square nets. The two movable oil nets 20 have a first side 201 and a second side 202 that are opposite and parallel to the first direction. Two first fixed jackets 212 are arranged at intervals along the left-right direction on the first side 201 and the second side 202 of the first movable oil net 21. Similarly, two second fixed jackets 222 are also arranged at intervals along the left-right direction on the first side 21 and the second side 22 of the second movable oil net 22.

[0042] The inner side of the flange 110 of the first air inlet area 111 of the first oil net 10 is provided with two first mounting plates 131 spaced apart from each other in the area opposite to the first fixed jacket 212 on the first movable oil net 21. The two first mounting plates 131 are provided with guide holes on the opposite side walls. The guide holes of the two first mounting plates 131 are penetrated with first guide rods 121 extending left and right, wherein both ends of the first guide rods 121 pass through the guide holes of the two first mounting plates 131 and extend outward for a distance. Specifically, the first guide rod 121 can be a stud with threads at both ends and a light column in the middle. The first guide rod 121 passes through the guide holes of the two first mounting plates 131 and is tightened and installed by nuts. The first fixed jacket 212 is slidably sleeved outside the first guide rod 121. The first guide rod 121 is also sleeved with a first spring (i.e., a first elastic member 141), one end of which is against one of the first mounting plates 131, and the other end is against the first fixed jacket 212. Under the elastic force of the first spring, the first movable oil net 21 always has a tendency to move toward the position of the second movable oil net 22. Similarly, the inner side of the flange 110 of the second air inlet area 112 of the first oil net 10 is provided with two second mounting plates 132 spaced apart from each other in the area opposite to the second fixed jacket 222 on the second movable oil net 22. The two second mounting plates 132 are provided with guide holes on the opposite side walls. The guide holes of the two second mounting plates 132 are provided with second guide rods 122 extending left and right, wherein the two ends of the second guide rods 122 pass through the guide holes of the two second mounting plates 132 and extend outward for a distance. Specifically, the second guide rod 122 can be a stud with threads at both ends and a light column in the middle. The second guide rod 122 passes through the guide holes of the two second mounting plates 132 and is tightened and installed by nuts. The first fixed jacket 212 is slidably sleeved outside the first guide rod 121. A second spring (i.e., a second elastic member 142) is sleeved outside 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 jacket 222. Under the elastic force of the second spring, the second movable oil net 22 always has a tendency to move away from the first movable oil net 21. When the first movable oil net 21 and the second movable oil net 22 are in a natural state, that is, when they move to the limit position only under the action of the first spring or the second spring, the second air inlet hole 200 on the first movable oil net 21 is opposite to the first air inlet hole 100 in the first air inlet area 111 of the first oil net 10, that is, the first air inlet area 111 of the first oil net 10 is in a fully open state, and the second air inlet hole 200 on the second movable oil net 22 is also opposite to the first air inlet hole 100 in the second air inlet area 112 of the first oil net 10, that is, the second air inlet area 112 of the first oil net 10 is also in a fully open state.The arrangement of the spring and guide column can, on the one hand, enable the movable oil net to automatically return to its initial position (i.e., fully open state) when no pressure is applied by the corresponding swing arm, and on the other hand, ensure the stability of the movable oil net in movement relative to the first oil net 10.

[0043] The motion mechanism of this embodiment includes a driving motor 31 and a swing arm mechanism drivingly connected to the output shaft of the driving motor 31. The swing arm mechanism includes a rotating shaft 32 and a first swing arm 33 and a second swing arm 34 which are circumferentially spaced apart on the rotating shaft 32 and can rotate with the rotating shaft 32. The rotating shaft 32 is rotatably arranged on a U-shaped fixed frame, and the driving motor 31 can be drivingly connected to the above-mentioned rotating shaft 32 through a worm gear assembly 35, thereby driving the rotating shaft 32 to rotate in the forward and reverse directions around its own axis. The end of the first swing arm 33 and the end of the second swing arm 34 are fixedly connected to the rotating shaft 32 by screws, and are specifically arranged in sequence along the axial direction of the rotating shaft 32, such as Figure 1 As shown, the first swing arm 33 is disposed between two wall panels of the U-shaped fixing frame, and the second swing arm 34 is disposed outside the wall panels of the U-shaped fixing frame. The first swing arm 33 and the second swing arm 34 are also spaced apart in the circumferential direction centered on the rotating shaft 32, that is, the first swing arm 33 and the second swing arm 34 are arranged at an angle.

[0044] The first movable oil net 21 is provided with a first vertical rod 211 perpendicular to the main body of the first movable oil net 21 on a side away from the first oil net 10 , and the second movable oil net 22 is provided with a second vertical rod 221 perpendicular to the main body of the second movable oil net 22 on a side away from the first oil net 10 . The first vertical rod 211 and the second vertical rod 221 mentioned above both extend toward the casing 40 of the range hood. Considering that the first vertical rod 211 and the second vertical rod 221 are too long and cause interference with other components in the casing 40 of the range hood, the first vertical rod 211 and the second vertical rod 221 should be as short as possible. In order to adapt to this and ensure that the first swing arm 33 and the second swing arm 34 can act on the corresponding side portions of the first vertical rod 211 and the second vertical rod 221 during the operation, the top of the first vertical rod 211 has a first guide portion 2110 extending obliquely from bottom to top toward the side away from the rotating shaft 32 (that is, extending obliquely from bottom to top toward the side away from the second movable oil net 22), and the top of the second vertical rod 221 has a second guide portion 2210 extending obliquely from bottom to top toward the side close to the rotating shaft 32 (that is, extending obliquely from bottom to top toward the side close to the first movable oil net 21). The free end of the first swing arm 33 also has a first driving rod 331 extending in a direction perpendicular to the main body of the first swing arm 33, and the free end of the second swing arm 34 also has a second driving rod 341 extending in a direction perpendicular to the main body of the second swing arm 34, that is, the first driving rod 331 and the second driving rod 341 are substantially parallel to the axis of the rotating shaft 32. Figure 2When the first swing arm 33 rotates along the rotation shaft 32 in the S1 direction, the first driving rod 331 of the first swing arm 33 will slide to the side of the first vertical rod 211 facing the position of the rotation shaft 32 under the guidance of the first guide portion 2110 (that is, slide to the side of the first vertical rod 211 facing the position of the second movable oil net 22), and in the process of continued rotation, a force is applied to the first vertical rod 211 to move sideways, thereby overcoming the elastic force of the first spring and moving along the A1 direction. In 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 in 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 in the first air inlet area 111 can be completely closed. Meanwhile, during this process, the second driving rod 341 of the second swing arm 34 does not contact the second vertical rod 221 of the second movable oil net 22, and the first air inlet hole 100 of the second air inlet area 112 of the first oil net 10 is always in a fully open state. Similarly, when the shaft 32 rotates in the opposite direction, the second swing arm 34 rotates along with the shaft 32 in the S2 direction, and the second driving rod 341 of the second swing arm 34 will slide to the side of the second vertical rod 221 away from the position of the shaft 32 under the guidance of the second guide portion 2210 (that is, slide to the side of the second vertical rod 221 away from the position of the second movable oil net 22), and in the process of continued rotation, a force is applied to the second vertical rod 221 to move sideways, thereby overcoming the elastic force of the second spring and moving in the A2 direction. In 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 in 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 in the second air inlet area 112 can be completely closed. Meanwhile, during this process, the first driving rod 331 of the first swing arm 33 does not contact the first vertical rod 211 of the first movable oil net 21, and the first air inlet hole 100 of the first air inlet area 111 of the first oil net 10 is always in a fully open state.

[0045] The first guide rod 121, the first spring and the first fixed jacket 212 constitute a guide module, and the guide module is provided in 4 groups, respectively located at the four corners of the first movable oil net 21. Similarly, the second guide rod 122, the second spring and the second fixed jacket 222 also constitute a guide module, and the guide module is provided in 4 groups, respectively located at the four corners of the second movable oil net 22.

[0046] The range hood of this embodiment also includes a state detection device for detecting the cooking state on the left and right sides. The state detection device can be an oil fume concentration sensor or a visual module that can identify the amount of oil fume. The state detection device and the drive motor 31 of the motion mechanism are both electrically connected to the controller of the range hood. The controller can control the drive motor 31 to rotate forward or reverse according to the cooking state signal transmitted by the state detection device to drive the corresponding movable oil net to move, thereby adjusting the air inlet area on both sides of the oil net device to achieve the purpose of flow distribution.

[0047] The working process of the oil screen device of this embodiment is as follows:

[0048] 1. The range hood is turned on, the smoke baffle 43 on it is opened, and the driving motor 31 thereof rotates, and the rotation direction is set to forward rotation (counterclockwise);

[0049] 2. The driving motor 31 rotates, driving the first swing arm 33 to move along Figure 1 The first swing arm 33 rotates in the S1 direction, and the first swing arm 33 contacts the first vertical rod 211 of the first movable oil net 21, pushing the first vertical rod 211 to move, and the first vertical rod 211 drives the first movable oil net 21 to move along Figure 2 At the same time, the first fixed jacket 212 of the first movable oil net 21 moves along the first guide rod 121, and the first spring is gradually compressed;

[0050] 4. The first air inlet hole 100 of the first air inlet area 111 of the first oil net 10 is gradually blocked by the first movable oil net 21, and the effective ventilation area is gradually reduced until the air inlet of the air inlet area is completely closed;

[0051] 5. When the driving motor 31 reverses, the first swing arm 33 is driven to rotate in the opposite direction, and the first movable oil net 21 performs translational motion under the action of the first spring. The blocked area of ​​the first air inlet hole 100 of the first air inlet area 111 of the first oil net 10 gradually decreases, and the effective ventilation area gradually increases until the air inlet of the first air inlet area 111 is fully opened.

[0052] 7. During the whole process of the reciprocating motion of the first movable oil net 21, the second movable oil net 22 on the right side remains relatively still with the first oil net 10, that is, the air inlet area on this side remains the largest.

[0053] Similarly, if the rotation direction of the driving motor 31 is set to reverse (clockwise) when the range hood is turned on, the second swing arm 34 drives the second movable oil net 22 to move, and the working method is the same as above, that is, the second movable oil net 22 is closed by the action of the second swing arm 34 and opened by the action of the second spring.

Claims

1. An oil net device, arranged at the air inlet of a range hood, comprising a first oil net (10) assembly and a second oil net assembly arranged in sequence along the air flow direction at the air inlet, wherein the first oil net (10) 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 (20) arranged in sequence along the first direction, 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 swing arm mechanism drivingly connected to the output shaft of the driving motor (31); the swing arm mechanism comprises a rotating shaft (32) and a first swing arm (33) and a second swing arm (34) which are arranged on the rotating shaft (32) at intervals along the circumferential direction and can rotate together with the rotating shaft (32); the rotating shaft (32) is drivingly connected to the output shaft of the driving motor (31) and can rotate around its own axis; the first swing arm (33) and the second swing arm (34) can selectively drive one of the two movable oil nets (20) 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 (20) is located.

2. The oil screen device according to claim 1, characterized in that: The one of the two movable oil nets (20) 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 rod (211) perpendicular to the main body of the first movable oil net (21) on a side away from the first oil net (10). The second movable oil net (22) is provided with a first vertical rod (211) perpendicular to the main body of the first movable oil net (21) on a side away from the first oil net (10). ) is provided on one side of the second movable oil net (22), and a second vertical rod (221) is perpendicular to the main body of the second movable oil net (22); the first swing arm (33) can abut against the first vertical rod (211) during the process of rotating with the rotating shaft (32), thereby driving the first movable oil net (21) to move relative to the first oil net (10); the second swing arm (34) can abut against the second vertical rod (221) during the process of rotating with the rotating shaft (32), thereby driving the second movable oil net (22) to move relative to the first oil net (10).

3. The oil screen device according to claim 2, characterized in that: The first swing arm (33) and the second swing arm (34) are arranged in sequence along the axial direction of the rotating shaft (32); the free end of the first swing arm (33) also has a first driving rod (331) whose extension direction is perpendicular to the main body of the first swing arm (33); the free end of the second swing arm (34) also has a second driving rod (341) whose extension direction is perpendicular to the main body of the second swing arm (34); when the first swing arm (33) rotates with the rotating shaft (32), its first driving rod (331) can abut against the first vertical rod (211) to drive the first movable oil net (21) to move relative to the first oil net (10); when the second swing arm (34) rotates with the rotating shaft (32), its second driving rod (341) can abut against the second vertical rod (221) to drive the second movable oil net (22) to move relative to the first oil net (10).

4. The oil screen device according to claim 3, characterized in that: When the first swing arm (33) rotates with the rotating shaft (32), the first driving rod (331) of the first swing arm (33) acts on the side of the first vertical rod (211) facing the position of the rotating shaft (32), thereby driving the first movable oil net (21) to move in a direction away from the rotating shaft (32); When the second swing arm (34) rotates with the rotating shaft (32), the second driving rod (341) of the second swing arm (34) acts on the side of the second vertical rod (221) away from the rotating shaft (32), thereby driving the second movable oil net (22) to move in a direction close to the rotating shaft (32).

5. The oil screen device according to claim 4, characterized in that: The top of the first vertical rod (211) has a first guide portion (2110) extending obliquely from bottom to top toward a side away from the rotating shaft (32), and the top of the second vertical rod (221) has a second guide portion (2210) extending obliquely from bottom to top toward a side close to the rotating shaft (32).

6. The oil screen device according to any one of claims 1 to 5, 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.

7. The oil screen device according to claim 6, characterized in that: The one of the two movable oil nets (20) opposite to the first air inlet area (111) of the first oil net (10) is recorded as a 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 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 causes the second movable oil net (22) to always have a tendency to remain in the first state.

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

9. The oil net device according to claim 8, 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 to each other 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. The oil net device according to any one of claims 1 to 5, characterized in that: The first oil net (10) comprises two sub-oil nets (11) arranged side by side along a first direction, 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).

11. The oil screen device according to any one of claims 1 to 5, 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, and the second direction is perpendicular to the first direction.

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.

13. The range hood according to claim 12, characterized in that: It 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 (20) to move and changing the air intake state of the air intake area on the side where the movable oil net (20) is located.

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