Smoke baffle drive structure and range hood

Abstract

This utility model relates to a smoke baffle driving structure and a range hood. The smoke baffle driving structure includes a housing with an air intake; a smoke baffle hinged to the housing for opening or closing the air intake, the smoke baffle being divided into a first baffle portion and a second baffle portion around its own rotation axis; a balancing component disposed in the portion with the smaller gravitational torque; and a driving component disposed within the housing with its movable end hinged to the smoke baffle for driving the opening and closing of the smoke baffle. By adding a balancing component to the portion with the smaller gravitational torque to act as a counterweight, the two portions of the smoke baffle are brought as close as possible to a state of gravitational balance, reducing the gravitational force that the driving component needs to overcome when driving the smoke baffle to open and close, thereby reducing the driving power.

Description

Technical Field

[0001] This utility model relates to the technical field of range hoods, and in particular to a smoke baffle drive structure and a range hood. Background Technology

[0002] Near-suction range hoods are usually equipped with a flip-up smoke baffle. When not cooking, the smoke baffle can close the air intake of the range hood to reduce backdraft and odor. When cooking is required, the smoke baffle can also rotate around the center of rotation to open the air intake and collect smoke at the front of the range hood.

[0003] Currently, in order to increase the smoke collection area at the front of the range hood and improve the smoke extraction effect, a larger smoke baffle is often selected. However, an excessively large smoke baffle will increase the weight of the smoke baffle, which will increase the power of the driver required to switch the smoke baffle on and off. On the one hand, it will increase the power consumption of the driver, and on the other hand, it will increase the heat generated by the driver and reduce its service life. Utility Model Content

[0004] Therefore, it is necessary to address the problem that excessively large smoke baffle areas lead to increased power requirements for the drive unit, and to provide a smoke baffle drive structure and range hood that can effectively reduce the power requirements of the smoke baffle drive unit.

[0005] This application first provides a smoke baffle driving structure, including a housing with an air intake; a smoke baffle hinged to the housing for opening or closing the air intake, the smoke baffle being divided into a first baffle portion and a second baffle portion around its own rotation axis; a balancing component disposed in the one with the smaller gravitational torque between the first baffle portion and the second baffle portion; and a driving component disposed in the housing with its movable end hinged to the smoke baffle for driving the opening and closing of the smoke baffle.

[0006] In one embodiment, the gravitational torques on both sides of the smoke baffle are equal with the rotation center axis as the center.

[0007] In one embodiment, the driving component is disposed on one side of the smoke baffle in the horizontal direction, and the balancing component extends horizontally through the smoke baffle and is fixed to the smoke baffle to form a mating surface extending through the smoke baffle.

[0008] In one embodiment, the cross-section of the balancing component perpendicular to its own length direction is triangular.

[0009] In one embodiment, the first baffle portion is located above the second baffle portion and its gravitational moment is less than that of the second baffle portion, and the balancing component is disposed on the first baffle portion.

[0010] In one embodiment, the balancing component is located on the side of the first baffle portion facing the air inlet, and at the end of the first baffle portion away from the rotation center axis; the height of the balancing component increases in the direction away from the rotation center axis to form a guide surface.

[0011] In one embodiment, the guide surface is provided with multiple parallel guide grilles.

[0012] In one embodiment, the end of the guide surface away from the rotation center axis is provided with a cyclone protrusion, and the balancing component also has a cyclone generating surface, which is connected to the end of the cyclone protrusion surface away from the rotation center axis, and the cyclone generating surface is perpendicular to the guide surface.

[0013] In one embodiment, the balancing component is movably disposed on the first baffle portion, the smoke baffle having an open state, a vertical state and a closed state, when the smoke baffle rotates from the vertical state to the open state or the closed state, the balancing component moves under its own weight to cause the first baffle portion to move away from the rotation center axis.

[0014] In one embodiment, the balancing assembly includes a connecting plate, a counterweight, and a flexible limiting member. The counterweight is fixed to one end of the connecting plate away from the rotation center axis, and the other end is hinged to the first baffle portion facing the air intake. One end of the flexible limiting member is fixed to the first baffle portion, and the other end is fixed to the connecting plate or the counterweight.

[0015] This application also provides a range hood, including a fan and the aforementioned smoke baffle drive structure, wherein the fan is disposed inside the housing and is used to draw in external oil fumes through the air intake.

[0016] The above-mentioned smoke baffle driving structure divides the smoke baffle into two parts (i.e., the first baffle part and the second baffle part) with the rotation center axis as the center, and adds a balancing component in the part with smaller gravitational torque to minimize the difference in gravitational torque between the two parts, so that the smoke baffle can approach the state of gravitational balance.

[0017] It is understandable that when the gravitational torque of the two parts of the smoke baffle centered on the rotation axis is equal, the two parts are in a state of gravitational equilibrium. At this time, the drive component only needs to provide the acceleration torque when the smoke baffle is opened and closed, without having to continuously resist gravity. This can effectively reduce the power demand on the drive component, thereby reducing the power consumption of the drive component and extending its service life.

[0018] In other words, by adding a balancing component to the part with a smaller gravitational torque in this application, the two parts of the smoke baffle are brought as close as possible to a state of gravitational equilibrium. This reduces the gravity that the drive component needs to overcome when driving the smoke baffle to open and close, thereby reducing the drive power. Attached Figure Description

[0019] Figure 1 This is a perspective view of one embodiment of the smoke baffle driving structure of this application in the smoke baffle open state;

[0020] Figure 2 for Figure 1 A sectional view;

[0021] Figure 3 for Figure 1 Cross-sectional view with the smoke baffle closed;

[0022] Figure 4 for Figure 1 A three-dimensional view of the middle smoke baffle and balancing components from another angle;

[0023] Figure 5 for Figure 2 Schematic diagram of airflow between the central balancing component and the air intake;

[0024] Figure 6 This is a cross-sectional view of the smoke baffle and the balancing assembly in the open state, according to another embodiment of the smoke baffle drive structure of this application.

[0025] Figure 7 for Figure 6 A cross-sectional view of the smoke baffle in the closed position.

[0026] Reference numerals: 10, housing; 11, air inlet; 20, smoke baffle; 21, first baffle section; 22, second baffle section; 30, balancing assembly; 31, airflow guide surface; 311, airflow guide grille; 312, cyclone protrusion; 313, cyclone generating surface; 32, connecting plate; 33, counterweight; 34, flexible limiting component; 40, drive assembly. Detailed Implementation

[0027] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0028] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0032] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0033] Please combine Figure 1 , Figure 2 as well as Figure 3 As shown, this application first provides a smoke baffle driving structure, including a housing 10 with an air intake 11; a smoke baffle 20, hinged to the housing 10, used to open or close the air intake 11, the smoke baffle 20 being divided into a first baffle portion 21 and a second baffle portion 22 around its own rotation axis; a balancing component 30, disposed in the one with the smaller gravitational torque between the first baffle portion 21 and the second baffle portion 22; and a driving component 40, disposed inside the housing 10 with its movable end hinged to the smoke baffle 20, used to drive the opening and closing of the smoke baffle 20.

[0034] In this application, the smoke baffle 20 is divided into two parts (i.e., the first baffle part 21 and the second baffle part 22) with the rotation center axis as the center, and a balancing component 30 is added to the part with smaller gravitational torque in order to minimize the difference in gravitational torque between the two parts, so that the smoke baffle 20 can approach the state of gravitational balance.

[0035] It is understandable that when the gravitational torques of the two parts of the smoke baffle 20 centered on the rotation center axis are equal, the two parts are in a state of gravitational equilibrium. At this time, the drive component 40 only needs to provide the acceleration torque during start-up and stop to drive the smoke baffle 20 to open and close without having to continuously resist gravity. This can effectively reduce the power demand on the drive component 40, thereby reducing the power consumption of the drive component 40 and extending its service life.

[0036] In other words, by adding a balancing component 30 to the part with smaller gravitational torque in this application, the two parts of the smoke baffle 20 are brought as close as possible to a state of gravitational balance. This reduces the gravity that the drive component 40 needs to overcome when driving the smoke baffle 20 to open and close, thereby reducing the driving power.

[0037] Here, gravitational torque represents the product of the gravity acting on the part and its gravitational arm, which is the horizontal distance between the part's center of gravity and the axis of rotation.

[0038] In some other embodiments, the gravitational torques of the first baffle portion 21 and the second baffle portion 22 are equal. At this time, the smoke baffle 20 itself is in a state of gravitational equilibrium. It is possible to choose not to set the balancing component 30 or to set the balancing component 30 at the position of the rotation center axis, as long as the smoke baffle 20 maintains a state of gravitational equilibrium.

[0039] Please refer to Figure 3 As shown, in some embodiments, the gravitational moments on both sides of the smoke baffle 20 are equal with respect to the rotation center axis; that is, G1×L1=G2×L2.

[0040] Taking the balancing component 30 disposed on the first baffle portion 21 as an example, G1 is the weight of the whole formed by the first baffle portion 21 and the balancing component 30, L1 is the horizontal distance between the center of gravity of the whole formed by the first baffle portion 21 and the balancing component 30 and the rotation center axis, G2 is the weight of the second baffle portion 22, and L2 is the horizontal distance between the center of gravity of the second baffle portion 22 and the rotation center axis.

[0041] Conversely, if the balancing component 30 is disposed on the second baffle portion 22, then G1 is the gravity of the first baffle portion 21, L1 is the horizontal distance between the center of gravity of the first baffle portion 21 and the rotation center axis, G2 is the gravity of the second baffle portion 22 and the balancing component 30 as a whole, and L2 is the horizontal distance between the center of gravity of the second baffle portion 22 and the balancing component 30 as a whole and the rotation center axis.

[0042] In other words, the gravitational torques of the two parts on both sides of the rotation center axis of the smoke baffle 20 are completely balanced, so that the smoke baffle 20 is in a static equilibrium state at any angle. The drive component 40 only needs to provide the acceleration torque during start-up and stop (that is, the drive component 40 only needs to overcome the minimum value of frictional resistance and inertial force), without having to continuously resist gravity. This can significantly reduce the operating energy consumption of the drive component 40 and reduce its heat generation, thereby extending its service life.

[0043] Furthermore, since the smoke baffle 20 is in a state of gravitational balance on both sides centered on the rotation center axis, even in the event of a power outage or other special circumstances where the drive component 40 loses its driving force, the smoke baffle 20 can maintain its own angle and will not rotate due to its own gravity after the loss of driving force, which can effectively improve the motion stability of the smoke baffle drive structure of this application.

[0044] It is worth mentioning that, in order to reduce the space occupied by the drive component 40 and the overall size of the range hood, most current models only install the drive component 40 on one side of the smoke baffle 20 in the horizontal direction. This results in an uneven force distribution on both sides of the smoke baffle 20, specifically manifested as follows:

[0045] When the smoke baffle 20 is closed, the active side of the smoke baffle 20 connected to the drive assembly 40 is closed by the drive assembly 40, but the driven side on the other side in the horizontal direction will deform under the action of gravity, which may cause it to not close tightly, thus causing backflow of smoke and odor.

[0046] When the smoke baffle 20 is opened, the active side of the smoke baffle 20 connected to the drive assembly 40 opens to the position under the action of the drive assembly 40, but the passive side on the other side along the horizontal direction will deform under the action of gravity and cannot open to the position. This results in the smoke gathering areas of the active side and the passive side being inconsistent, which in turn leads to differences in the smoking effect on both sides and poor smoking balance.

[0047] In this regard, please refer to Figure 1 as well as Figure 4 As shown, in some embodiments, the drive assembly 40 is disposed on one side of the smoke baffle 20 along the horizontal direction, and the balance assembly (30) traverses the smoke baffle (20) in the horizontal direction and is attached and fixed to the smoke baffle (20) to form a contact surface traversing the smoke baffle (20).

[0048] By balancing the component 30 horizontally across the smoke baffle 20 and fixing it to the smoke baffle 20 to form an integral rigid frame, the component 30 can act as a lateral force transmission component, uniformly transmitting the torque applied to one side of the smoke baffle 20 by the drive component 40 in the horizontal direction to the other side of the smoke baffle 20, thereby avoiding asynchronous movement and uneven force on both sides of the smoke baffle 20; that is, by using a single-sided drive component 40 in combination with the balancing component 30, a near-dual-sided drive synchronization effect is achieved, effectively reducing equipment costs and the space required for installation.

[0049] Furthermore, since the smoke baffle 20 has a large deflection, its middle part along the horizontal direction is prone to collapse and deformation when the smoke baffle 20 is in the closed state. In this application, the balancing component 30 fixed to the smoke baffle 20 can act as a structural reinforcement to increase the structural strength of the smoke baffle 20. By reducing the deflection of the smoke baffle 20, the possibility of deformation of the smoke baffle 20 due to gravity is reduced, that is, the possibility of the smoke baffle 20 collapsing in the middle is reduced, thereby further improving the driving synchronization effect on both sides of the smoke baffle 20.

[0050] It is worth mentioning that by using the balancing component 30 for force transmission and structural reinforcement, compared to the traditional method of directly adding structural reinforcements to the smoke baffle 20, which would inevitably increase the overall mass of the smoke baffle 20 and thus increase the power demand on the drive component 40, this application uses the balancing component 30 to place the part of the smoke baffle 20 with a smaller gravitational torque. The added balancing component 30 reduces the gravitational torque difference between the two parts of the smoke baffle 20, making the smoke baffle 20 closer to a state of gravitational balance, thereby reducing the power demand on the drive component 40.

[0051] Specifically, the material of the balancing component 30 can be stainless steel, aluminum alloy, etc., as long as it can improve the rigidity of the smoke baffle 20 after it is fixed.

[0052] For further details, please refer to... Figure 4 As shown, in some embodiments, the cross section of the balancing component 30 perpendicular to its own length direction is triangular; it should be understood that the triangle has relatively high stability, which can further increase the rigidity of the overall structure formed by the balancing component 30 and the smoke baffle 20, thereby more effectively suppressing the problem of the central collapse of the smoke baffle 20; in addition, after one side of the triangle is attached and fixed to the smoke baffle 20, the other side can serve as a guide surface 31 to meet the guide requirements.

[0053] Please combine Figure 2 as well as Figure 3 As shown, in some embodiments, the first baffle portion 21 is located above the second baffle portion 22 and its gravitational moment is less than that of the second baffle portion 22. The balancing component 30 is disposed on the first baffle portion 21. It should be understood that the area of ​​the first baffle portion 21 located on the upper side is relatively small, and the hinge point of the drive component 40 is relatively high, so that when the smoke baffle 20 is opened, the outwardly opening second baffle portion 22 can cooperate with the housing 10 to form a larger smoke-gathering area, thereby obtaining a better smoking effect.

[0054] Currently, there is a structural gap between the rear end of the smoke baffle 20 (equivalent to the end of the first baffle part 21 away from the rotation center axis in this application) and the upper part of the air intake 11. As a result, when the gas flows along the wall of the smoke baffle 20 to the rear end during cooking, it cannot be smoothly introduced into the air intake 11, which leads to increased vortex in this area, flow loss and reduced smoke extraction effect.

[0055] In this regard, please refer to Figure 4 as well as Figure 5 As shown, in some embodiments, the balancing component 30 is located on the side of the first baffle portion 21 facing the air intake 11, and is located at the end of the first baffle portion 21 away from the rotation center axis; the height of the balancing component 30 increases in the direction away from the rotation center axis to form a guide surface 31 facing the air intake 11 when the smoke baffle 20 is open.

[0056] When the gas flows along the wall of the smoke baffle 20 to the end of the first baffle 21 away from the rotation center axis, it will change its flow direction under the guidance of the gradually increasing guide surface 31 and be guided into the air intake 11, thereby assisting the airflow to enter the air intake 11 and reducing air volume loss; that is to say, there is no need to set up an independent air guide structure, and the air guide function can be achieved by relying solely on the balance component 30.

[0057] Furthermore, by placing the balancing component 30 at the end of the first baffle portion 21 away from the rotation center axis, the gravitational arm of the balancing component 30 can be increased, thereby maximizing the counterweight effect of the balancing component 30.

[0058] Please refer to Figure 4 As shown, in some embodiments, multiple parallel airflow guide grilles 311 are provided on the airflow guide surface 31; the airflow guide grilles 311 can straighten the airflow direction and reduce the turbulence caused by the airflow during the reversal process.

[0059] Specifically, multiple airflow guide grilles 311 are spaced apart along a direction parallel to the rotation center axis, and each airflow guide grille 311 is parallel to the airflow direction (when the smoke baffle 20 is open, it faces the air intake 11).

[0060] Please refer to Figure 5 As shown, in some embodiments, the end of the guide surface 31 away from the rotation center axis is provided with a cyclone protrusion 312, and the balancing component 30 also has a cyclone generating surface 313. The cyclone generating surface 313 is connected to the end of the surface of the cyclone protrusion 312 away from the rotation center axis, and the cyclone generating surface 313 is perpendicular to the guide surface 31.

[0061] Because there is a movement gap between the rear end of the smoke baffle 20 and the air intake 11, turbulence is easily caused when the airflow passes through this gap, resulting in airflow loss. However, by providing a cyclone protrusion 312 and a cyclone generating surface 313 at the end of the guide surface 31, the function is that when the airflow rectified by the guide surface 31 quickly passes through the cyclone protrusion 312, a cyclone can be formed within the gap between the rear end of the smoke baffle 20 and the air intake 11. Figure 5 The airflow rotates counterclockwise, and the greater the air volume, the stronger the airflow. Since the airflow is in the same direction as the airflow, it helps to guide the auxiliary airflow into the air intake 11 and reduce air volume loss.

[0062] The presence of the cyclone-generating surface 313 can guide the airflow passing through the cyclone protrusion 312 to facilitate the formation of the cyclone flow.

[0063] Please combine Figure 6 as well as Figure 7As shown, in some embodiments, the balancing component 30 is movably disposed on the first baffle portion 21. The smoke baffle 20 has an open state, a vertical state, and a closed state. When the smoke baffle 20 rotates from the vertical state to the open state or the closed state, the balancing component 30 moves under its own weight so that the center of gravity of the first baffle portion 21 moves away from the rotation center axis.

[0064] It is understandable that when the smoke baffle 20 rotates from the vertical state to the open state, the balancing component 30 moves under its own weight, and the center of gravity of the first baffle portion 21 moves away from the rotation center axis. That is to say, the gravitational torque on one side of the first baffle portion 21 increases. At this time, the smoke baffle 20 has a tendency to open further under the action of the increased gravitational torque of the first baffle portion 21. However, since the smoke baffle 20 is limited to the open state, the increased gravitational torque will cause the smoke baffle 20 to remain in the open state, so as to improve the stability of the smoke baffle 20 in the open state.

[0065] Similarly, when the smoke baffle 20 rotates from the vertical state to the closed state, the balancing component 30 moves under its own weight, and the center of gravity of the first baffle portion 21 also moves away from the rotation center axis. That is to say, the gravitational torque on one side of the first baffle portion 21 increases. At this time, the smoke baffle 20 has a tendency to move further closed under the action of the increased gravitational torque of the first baffle portion 21. However, since the smoke baffle 20 is limited to the closed state, the increased gravitational torque will cause the smoke baffle 20 to remain in the closed state, so as to improve the stability of the smoke baffle 20 in the closed state.

[0066] The aforementioned balancing component 30 is movably disposed on the first baffle portion 21. This movability includes, but is not limited to, moving, rotating, or moving and rotating simultaneously. Specific movable structures include, but are not limited to, slide rails, hinges, or roller structures. As long as the movement of the balancing component 30 can cause the center of gravity of the first baffle portion 21 to move away from the rotation center axis, this application will not provide specific examples.

[0067] Please combine Figure 6 as well as Figure 7 As shown, in some embodiments, the balancing component 30 includes a connecting plate 32, a counterweight 33, and a flexible limiting member 34. The counterweight 33 is fixed to one end of the connecting plate 32 away from the rotation center axis, and the other end is hinged to the first baffle portion 21 on the side facing the air intake 11. One end of the flexible limiting member 34 is fixed to the first baffle portion 21, and the other end is fixed to the connecting plate 32 or the counterweight 33.

[0068] It should be noted that the vertical state of the smoke baffle 20 here refers to the state in which the connecting plate 32 and the counterweight 33 are exactly vertical, and not the vertical state of the smoke baffle 20 itself.

[0069] When the smoke baffle 20 rotates from the vertical position to the open position, the connecting plate 32, under the gravity of the counterweight 33, starts from the vertical position and moves along... Figure 6 The counterweight 33 rotates clockwise, thereby gradually increasing the gravity arm L3 of the counterweight 33 and increasing the gravitational torque (G3×L3) of the counterweight 33, which plays a positive role in maintaining the open state of the smoke baffle 20.

[0070] Conversely, when the smoke baffle 20 rotates from the vertical position to the closed position, the connecting plate 32, under the gravity of the counterweight 33, starts from the vertical position and moves along... Figure 7 The counterclockwise rotation causes the gravity arm L3 of the counterweight 33 to gradually increase, and the gravitational torque (G3×L3) of the counterweight 33 to increase, which plays a positive role in maintaining the closed state of the smoke baffle 20 and improves the stability of the smoke baffle 20 in the closed state.

[0071] The flexible limiting component 34 is used to limit the extreme rotational position of the connecting plate 32, preventing the gravity arm L3 of the counterweight 33 from shrinking due to excessive rotation angle of the connecting plate 32. Specifically, a planar coordinate system is established with the rotation center axis as the origin, referring to... Figure 6 as well as Figure 7 When the smoke baffle 20 is in the vertical position, the counterweight 33 is located between the first and second quadrants of the plane coordinate system; when the smoke baffle 20 is in the open position, the counterweight 33 is located in the first quadrant of the plane coordinate system; when the smoke baffle 20 is in the closed position, the counterweight 33 is located in the second quadrant of the plane coordinate system.

[0072] Furthermore, in some embodiments, the flexible limiting member 34 is a spring to provide a certain buffering effect and prevent the counterweight 33 from colliding with the smoke baffle 20, which could cause noise or even damage.

[0073] This application also provides a range hood, including a fan and the aforementioned smoke baffle drive structure. The fan is disposed inside the housing 10 and is used to draw in external oil fumes through the air intake 11.

[0074] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A smoke screen panel drive structure, characterized by, include The housing (10) has an air intake (11). The smoke baffle (20) is hinged to the housing (10) and is used to open or close the air intake (11). The smoke baffle (20) is divided into a first baffle part (21) and a second baffle part (22) with its own rotation center axis as the center. A balancing component (30) is disposed in the one with the smaller gravitational torque between the first baffle portion (21) and the second baffle portion (22); as well as A drive assembly (40) is disposed inside the housing (10) and its movable end is hinged to the smoke baffle (20) for driving the opening and closing of the smoke baffle (20).

2. The smoke screen panel drive structure of claim 1, wherein, With the rotation center axis as the center, the gravitational torque on both sides of the smoke baffle (20) is equal.

3. The smoke screen panel drive structure of claim 1, wherein, The driving component (40) is disposed on one side of the smoke baffle (20) in the horizontal direction, and the balancing component (30) runs horizontally through the smoke baffle (20) and is attached and fixed to the smoke baffle (20) to form a contact surface that runs horizontally through the smoke baffle (20).

4. The smoke screen panel drive structure of claim 3, wherein, The cross section of the balancing component (30) perpendicular to its own length direction is triangular.

5. The smoke screen panel drive structure of claim 1, wherein, The first baffle portion (21) is located above the second baffle portion (22) and its gravitational moment is less than that of the second baffle portion (22). The balancing component (30) is disposed on the first baffle portion (21).

6. The smoke screen panel drive structure of claim 5, wherein, The balancing component (30) is located on the side of the first baffle portion (21) facing the air inlet (11), and is located at the end of the first baffle portion (21) away from the rotation center axis; The height of the balancing component (30) increases in a direction away from the rotation center axis to form a guide surface (31).

7. The smoke screen panel drive structure of claim 6, wherein, The guide surface (31) is provided with multiple parallel guide grids (311).

8. The smoke screen panel drive structure of claim 6, wherein, The guide surface (31) has a cyclone protrusion (312) at one end away from the rotation center axis. The balance component (30) also has a cyclone generating surface (313). The cyclone generating surface (313) is connected to the end of the cyclone protrusion (312) away from the rotation center axis, and the cyclone generating surface (313) is perpendicular to the guide surface (31).

9. The smoke baffle driving structure according to claim 5, characterized in that, The balancing component (30) is movably disposed on the first baffle portion (21). The smoke baffle (20) has an open state, a vertical state, and a closed state. When the smoke baffle (20) rotates from the vertical state to the open state or the closed state, the balancing component (30) moves under its own weight so that the first baffle portion (21) moves away from the rotation center axis.

10. The smoke screen panel drive structure of claim 9, wherein, The balancing component (30) includes a connecting plate (32), a counterweight (33), and a flexible limiting member (34). The counterweight (33) is fixed to one end of the connecting plate (32) away from the rotation center axis, and the other end is hinged to the first baffle part (21) on the side facing the air intake (11). One end of the flexible limiting member (34) is fixed to the first baffle part (21), and the other end is fixed to the connecting plate (32) or the counterweight (33).

11. A range hood characterized by The smoke baffle driving structure comprises a fan and a smoke baffle driving structure as claimed in any one of claims 1-10, wherein the fan is arranged inside the box (10) and used for sucking the external oil fume into through the air suction port (11).

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