Telescopic panel assembly and range hood with same

Abstract

The telescopic panel assembly comprises a telescopic inner cavity, a telescopic panel and a driving assembly, the telescopic panel is connected into the telescopic inner cavity in a sliding mode, a moving assembly is arranged on the telescopic panel, and the driving assembly is connected with the telescopic inner cavity in a sliding mode. The moving assembly has a first state for driving the telescopic panel to stretch out of the telescopic inner cavity and a second state for driving the telescopic panel to retract into the telescopic inner cavity, and in the second state, the moving assembly has a first moving distance and a second moving distance; the time for the telescopic panel to retract into the telescopic inner cavity can be shortened by accelerating the moving assembly to the maximum speed, within the second moving distance, the moving assembly is reduced to the speed from the maximum speed, and when the telescopic panel completely retracts into the telescopic inner cavity, the inertia caused by sudden reduction of the speed of the moving assembly is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of range hoods, and in particular to a telescopic panel assembly and a range hood having the same. Background Art

[0002] Some existing range hoods have a telescopic panel assembly, on which functional devices such as lighting and air curtain fans are provided. When the range hood is in use, the telescopic panel assembly is driven to extend by a driving mechanism so that functional devices such as lighting and air curtain fans can be started and used. When the range hood is turned off, the driving mechanism drives the telescopic panel assembly to retract, so as to reduce the occupation of kitchen space by functional devices such as lighting and air curtain fans when they are idle. The related technology drives the telescopic panel assembly to extend or retract through a motor, but the movement process of the telescopic panel assembly to extend or retract each time is uniform, especially when the telescopic panel assembly is fully retracted into the telescopic inner cavity, the inertia of the telescopic panel assembly is relatively large when the speed of the telescopic panel assembly drops to zero suddenly. Utility Model Content

[0003] The purpose of the utility model is to provide a telescopic panel assembly and a range hood having the same, which are used to solve the above-mentioned technical problems.

[0004] The telescopic panel assembly of the utility model is used for a range hood, and comprises:

[0005] Telescopic inner cavity;

[0006] The telescopic panel is slidably connected in the telescopic inner cavity, and a moving component is arranged on the telescopic panel. The moving component has a first state of driving the telescopic panel to extend out of the telescopic inner cavity and a second state of driving the telescopic panel to retract into the telescopic inner cavity. In the second state, the moving component has a first moving distance and a second moving distance. In the first moving distance, the moving component is accelerated to a maximum speed, and in the second moving distance, the moving component is reduced from the maximum speed to a speed of 0;

[0007] The driving component is arranged in the telescopic inner cavity and is used for driving the moving component to move in the telescopic inner cavity.

[0008] According to one embodiment of the utility model, the driving component includes a driving member and a transmission component, the driving member adopts a motor, the transmission component includes a first connecting rod, a second connecting rod, a first gear and a second gear, the first end of the first connecting rod is connected to the output end of the driving member, the second end of the first connecting rod is connected to the first end of the second connecting rod, the second end of the second connecting rod is rotatably connected to the first gear, the second gear is meshed with the first gear, the central axis of the first gear is rotatably connected to the telescopic inner cavity, and the second gear is transmission-connected to the moving component.

[0009] According to an embodiment of the present utility model, the first connecting rod has a first limit position and a second limit position. When in the first limit position, the first end of the first connecting rod is located between the first end and the second end of the second connecting rod; when in the second limit position, the second end of the first connecting rod is located between the first end of the first connecting rod and the second end of the second connecting rod. Each time the motor drives the first connecting rod to rotate half a turn, the first connecting rod completes one rotation from the first limit position / second limit position to the second limit position / first limit position. When the first connecting rod moves from the first limit position to the second limit position, it drives the second connecting rod to rotate in the first direction. When the first connecting rod rotates from the second limit position to the first limit position, the second connecting rod rotates in the second direction, and the first direction and the second direction are opposite.

[0010] According to an embodiment of the present utility model, after the second connecting rod rotates to the first limit position / second limit position, the telescopic panel extends / retracts into the telescopic cavity, and the driving member stops starting. When the driving member starts again, the rotation direction of the first connecting rod remains unchanged, the second connecting rod swings in the reverse direction, and drives the second gear to rotate in the reverse direction. The second gear drives the moving assembly to move in the reverse direction and makes the telescopic panel retract / extend into the telescopic cavity.

[0011] According to an embodiment of the present utility model, the steering of the motor driving the first connecting rod to rotate remains unchanged. When the first connecting rod rotates from the first limit position to the second limit position and then from the second limit position to the first limit position, the steering is the same, and a circular motion with the first connecting rod as the radius is completed.

[0012] According to an embodiment of the present utility model, when in the first limit position / second limit position, the second end of the second connecting rod is located below the center of the second gear.

[0013] According to an embodiment of the present utility model, the torque M of the second connecting rod = FR 2 sinθ; F is the force exerted by the first connecting rod on the second end of the second connecting rod, and θ is the angle between the first connecting rod and the second connecting rod. When in the second limit position, the angle between the first connecting rod and the second connecting rod is 180°. When moving from the first limit position, the angle between the first connecting rod and the second connecting rod is 0°. When the first connecting rod moves from the second limit position to the first limit position, the angle between the first connecting rod and the second connecting rod gradually becomes smaller, and the second connecting rod drives the second gear to accelerate first and then decelerate.

[0014] According to an embodiment of the present utility model, when the angle θ between the first connecting rod and the second connecting rod reaches 90°, the motor stops for a time t1, and then continues to drive the first connecting rod to move to the second limit position.

[0015] According to an embodiment of the present utility model, the moving assembly includes a wheel shaft rotatably connected to the telescopic panel and a follower wheel provided on the wheel shaft. The wheel shaft is connected to the output end of the transmission assembly. A guiding rack is provided in the telescopic cavity, and the follower wheel meshes with the guiding rack.

[0016] A range hood adopts the above telescopic panel assembly, and includes a range hood main body having a telescopic cavity. A driving assembly drives the telescopic panel to extend or retract into the telescopic cavity; an air curtain assembly and / or a PM2.5 detection module and / or a lighting assembly are provided in the installation cavity of the telescopic panel. An air curtain air inlet and an air curtain air outlet corresponding to the air curtain assembly, and / or a detection air hole corresponding to the PM2.5 detection module, and / or a lighting window corresponding to the lighting assembly are provided on the telescopic panel. When the telescopic panel extends out of the telescopic cavity, the air curtain air inlet and the air curtain air outlet of the air curtain assembly move out of the telescopic cavity; or / and the detection air hole of the PM2.5 detection module moves out of the telescopic cavity; or / and the lighting window moves out of the telescopic cavity.

[0017] Compared with the prior art, the telescopic panel assembly of the present utility model has the following advantages:

[0018] In the telescopic panel assembly of the present utility model, by driving the moving assembly to move with the driving assembly, and making the moving assembly accelerate to the maximum speed within the first moving distance, the time for the telescopic panel to retract into the telescopic cavity can be shortened. Within the second moving distance, the moving assembly decelerates from the maximum speed to a speed of zero. When the telescopic panel is completely retracted into the telescopic cavity, the inertia of the sudden drop of the speed of the moving assembly to zero is reduced. Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the telescopic panel assembly of the present utility model;

[0020] Figure 2 is a schematic structural diagram of an embodiment of the driving assembly of the telescopic panel assembly of the present utility model;

[0021] Figure 3 is a schematic structural diagram of the driving assembly of the telescopic panel assembly of the present utility model in another direction;

[0022] Figure 4 is a schematic structural diagram when the telescopic panel of the range hood with the telescopic panel assembly of the present utility model retracts into the telescopic cavity;

[0023] Figure 5 is a schematic structural diagram when the telescopic panel of the range hood with the telescopic panel assembly of the present utility model extends out of the telescopic cavity;

[0024] Figure 6 is a schematic structural diagram of another direction when the telescopic panel of the range hood with the telescopic panel assembly of the present utility model extends out of the telescopic cavity.

[0025] In the figure: a. Telescopic inner cavity; a1. Guide rack; 1. Telescopic panel; 11. Moving component; 111. Wheel axle; 112. Follow-up wheel; 12. Air curtain suction port; 13. Air curtain air outlet; 14. Detection air hole; 15. Lighting window; 2. Driving component; 21. Driving part; 22. Transmission component; 221. First connecting rod; 222. Second connecting rod; 223. First gear; 224. Second gear; 3. Range hood main body.

[0026] The realization and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0027] The following will disclose multiple embodiments of the present utility model in the form of diagrams. For the sake of clarity, many practical details will be described together in the following narrative. However, it should be understood that these practical details are not used to limit the present utility model. That is to say, in some embodiments of the present utility model, these practical details are not necessary. In addition, for the purpose of simplifying the diagrams, some conventional structures and components will be shown in a simple schematic manner in the diagrams.

[0028] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If this specific posture changes, then the directional indications will also change accordingly.

[0029] In addition, in the present utility model, descriptions such as "first" and "second" are only for descriptive purposes, and do not particularly refer to the order or sequence, nor are they used to limit the present utility model. It is only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those skilled in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0030] To further understand the content, characteristics and effects of the present utility model, the following embodiments are cited and described in detail with the accompanying drawings as follows:

[0031] The present utility model discloses a telescopic panel assembly for a range hood. Please refer to Figure 1 and Figure 2, the telescopic panel assembly includes a telescopic inner cavity a, a telescopic panel 1 and a driving assembly 2.

[0032] The telescopic panel 1 is slidably connected to the inside of the telescopic inner cavity a, and is provided with a moving assembly 11 thereon. The moving assembly 11 has a first state of driving the telescopic panel 1 to extend out of the telescopic inner cavity a and a second state of driving the telescopic panel 1 to retract into the telescopic inner cavity a. In the second state, the moving assembly 11 has a first moving distance and a second moving distance. Within the first moving distance, the moving assembly 11 accelerates to the maximum speed. Within the second moving distance, the moving assembly 11 decelerates from the maximum speed to a speed of 0; the driving assembly 2 is disposed inside the telescopic inner cavity a and is used to drive the moving assembly 11 to move inside the telescopic inner cavity a.

[0033] In this embodiment, the telescopic inner cavity a is used to accommodate the telescopic panel 1 and the driving assembly 2. The telescopic inner cavity a is a cavity on the device to which the telescopic panel assembly is applied. For example, when the telescopic panel assembly is applied to a range hood, the telescopic inner cavity a is a cavity of the range hood. Functional devices can be provided on the telescopic panel 1. When applied to a range hood, the functional devices can be a lighting lamp, an air curtain fan, etc. By making the telescopic panel 1 have a first state of extending out of the telescopic inner cavity a and a second state of driving the telescopic panel 1 to retract into the telescopic inner cavity a, when the functional devices need to be used, the telescopic panel 1 is extended out of the telescopic inner cavity a, and when not in use, the telescopic panel 1 can be retracted into the telescopic inner cavity a to hide the telescopic panel 1 and reduce the space occupied by functional devices such as the lighting lamp and the air curtain fan in the idle state. Then the specific structure of the telescopic panel 1 can be designed according to actual needs and is not specifically limited herein.

[0034] The moving assembly 11 cooperates with the driving assembly 2 to drive the telescopic panel 1 to extend or retract into the telescopic inner cavity a. And when the telescopic panel 1 retracts into the telescopic inner cavity a, the driving assembly 2 drives the moving assembly 11 to perform variable-speed movement of accelerating first and then decelerating. Then there can be many structures for the driving assembly 2. For example, the driving member 21 of the driving assembly 2 can drive the moving assembly 11 to perform variable-speed movement through structures such as a link mechanism and a crank-slider mechanism. There can also be many structures for the moving assembly 11, as long as it can cooperate with the driving assembly 2 to drive the telescopic panel 1 to perform variable-speed telescopic movement of accelerating and decelerating. The specific structures of the moving assembly 11 and the driving assembly 2 are not limited herein.

[0035] The telescopic panel assembly of the present utility model drives the moving assembly 11 to move by the driving assembly 2, and makes the moving assembly 11 accelerate to the maximum speed within the first moving distance, which can shorten the time for the telescopic panel 1 to retract into the telescopic inner cavity a. Within the second moving distance, the moving assembly 11 decelerates from the maximum speed to a speed of 0. When the telescopic panel 1 is completely retracted into the telescopic inner cavity a, the inertia of the sudden drop of the speed of the moving assembly 11 to 0 is reduced.

[0036] According to one embodiment of the present invention, please refer to Figure 2 and Figure 3 The driving component 2 includes a driving member 21 and a transmission component 22. The driving member 21 adopts a motor. The transmission component 22 includes a first connecting rod 221, a second connecting rod 222, a first gear 223 and a second gear 224. The first end of the first connecting rod 221 is connected to the output end of the driving member 21, the second end of the first connecting rod 221 is connected to the first end of the second connecting rod 222, the second end of the second connecting rod 222 is rotatably connected to the first gear 223, the second gear 224 is meshed with the first gear 223, the central axis of the first gear 223 is rotatably connected to the telescopic inner cavity a, and the second gear 224 is transmission-connected to the moving component 11.

[0037] In this embodiment, it should be noted that the first connecting rod 221 and the second connecting rod 222 are arranged in parallel, and the first end of the first connecting rod 221 and the first end of the second connecting rod 222 are arranged on the same side, and the second end of the first connecting rod 221 and the second end of the second connecting rod 222 are arranged on the same side. The first connecting rod 221 and the second connecting rod 222 are rotatably connected. The first end of the first connecting rod 221 is connected to the output end of the driving member 21, the second end of the first connecting rod 221 is connected to the first end of the second connecting rod 222, and the second end of the second connecting rod 222 is rotatably connected to the first gear 223, then the first connecting rod 221, the second connecting rod 222 and the first gear 223 constitute a crank connecting rod mechanism. The transmission assembly 22 is formed by the first connecting rod 221, the second connecting rod 222, the first gear 223 and the second gear 224. The crank-connecting rod mechanism is cleverly utilized so that the driving member 21 can drive the moving assembly 11 to change speed through the transmission assembly 22, thereby realizing the speed-changing retraction of the telescopic panel 1. The speed-changing structure is simple, low-cost, and easy to realize large-scale mass production.

[0038] According to one embodiment of the present invention, please refer to Figure 2 and Figure 3 The first connecting rod 221 has a first extreme position and a second extreme position. In the first extreme position, the first end of the first connecting rod 221 is located between the first end and the second end of the second connecting rod 222; in the second extreme position, the second end of the first connecting rod 221 is located between the first end of the first connecting rod 221 and the second end of the second connecting rod 222. Every time the motor drives the first connecting rod 221 to rotate half a circle, the first connecting rod 221 completes a rotation from the first extreme position / second extreme position to the second extreme position / first extreme position. When the first connecting rod 221 moves from the first extreme position to the second extreme position, it drives the second connecting rod 222 to rotate in the first direction. When the first connecting rod 221 rotates from the second extreme position to the first extreme position, the second connecting rod 222 rotates in the second direction. The first direction and the second direction are opposite.

[0039] In this embodiment, taking the driving member 21 driving the first connecting rod 221 to rotate clockwise and the first extreme position as the starting position, and the first connecting rod 221 moving from the first extreme position to the second extreme position as an example, the commutation principle of the driving assembly 2 is described as follows: The driving member 21 drives the first connecting rod 221 to rotate clockwise. When the first connecting rod 221 is at the first extreme position, the first end of the second connecting rod 222 also moves to the extreme position. At this time, the distance between the second end of the second connecting rod 222 and the first end of the first connecting rod 221 is the shortest. When the driving member 21 drives the first connecting rod 221 to rotate clockwise, the second end of the first connecting rod 221 swings downward and pulls the first end of the second connecting rod 222 connected thereto to swing downward. When the first end of the second connecting rod 222 swings downward, the second end of the second connecting rod 222 exerts an upward force on the first gear 223. Since the first gear 223 cannot move up and down, the force of the second connecting rod 222 on the first gear 223 becomes a rotational force, causing the first gear 223 to rotate clockwise. When the first connecting rod 221 moves to the second extreme position, the second connecting rod 222 also moves to the extreme position. At this time, the distance between the second end of the second connecting rod 222 and the first end of the first connecting rod 221 is the largest. Since the length of the second connecting rod 222 is less than the diameter of the first gear 223, at the second extreme position, when the second end of the first connecting rod 221 continues to swing upward, the first end of the second connecting rod 222 cannot continue to swing upward with the second section of the first connecting rod 221, and the second end of the second connecting rod 222 will swing downward. Similarly, since the first gear 223 cannot move up and down, the force of the second connecting rod 222 on the first gear 223 becomes a rotational force, causing the first gear 223 to rotate counterclockwise, and the rotation direction of the first gear 223 changes. Since the second gear 224 is driven by the first gear 223, the second gear 224 commutes synchronously with the first gear 223.

[0040] According to an embodiment of the present invention, please refer to Figure 2 and Figure 3 , after the second connecting rod 222 rotates to the first extreme position / second extreme position, the telescopic panel 1 extends / retracts into the telescopic cavity a, the driving member 21 stops starting. When the driving member 21 starts again, the rotation direction of the first connecting rod 221 remains unchanged, the second connecting rod 222 swings in the reverse direction, and drives the second gear 224 to rotate in the reverse direction. The second gear 224 drives the moving assembly 11 to move in the reverse direction and makes the telescopic panel 1 retract / extend into the telescopic cavity a.

[0041] When applied to a range hood, when the range hood starts, the telescopic panel 1 needs to fully extend out of the telescopic cavity a. Therefore, after the telescopic panel 1 fully extends out of the telescopic cavity a, the driving member 21 stops starting. At this time, the air curtain assembly or lighting assembly on the range hood main body 3 can extend out of the telescopic cavity a and work when the range hood is operating; when the range hood finishes the oil fume extraction work, the user turns off the range hood, and the driving member 21 will start again and retract the telescopic panel 1 into the telescopic cavity a. When the telescopic panel 1 completely retracts into the telescopic cavity a, the driving member 21 stops starting. In this embodiment, when the telescopic panel 1 fully extends out of the telescopic cavity a, the first connecting rod 221 is at the first extreme position, and when the telescopic panel 1 completely retracts into the telescopic cavity a, the first connecting rod 221 is at the second extreme position.

[0042] According to an embodiment of the present invention, please refer to Figure 2 and Figure 3 , when the motor drives the first connecting rod 221 to rotate, the rotation direction remains unchanged. When the first connecting rod 221 rotates from the first extreme position to the second extreme position and then from the second extreme position to the first extreme position, the rotation direction is the same, and a circular motion with the first connecting rod 221 as the radius is completed. That is, the motor and the first connecting rod 221 only need to rotate in one direction to drive the second connecting rod 222 to rotate forward and backward.

[0043] According to an embodiment of the present invention, please refer to Figure 2 and Figure 3 , when at the first extreme position / second extreme position, the second end of the second connecting rod 222 is located below the center of the second gear 224. When at the first extreme position / second extreme position, the second end of the second connecting rod 222 is located below the center of the second gear 224, which means that when the second connecting rod 222 is at the first extreme position or the second extreme position, the distance that the second connecting rod 222 extends to the corresponding side is less than the distance that a radius on the first gear 223, which coincides with the extension line passing through the midpoint of the central axis of the motor and the midpoint of the first gear 223, extends to the corresponding side. Therefore, when the first connecting rod 221 continues to rotate in the same direction at the first extreme position and the second extreme position, the second connecting rod 222 will not be able to continue to rotate in the same direction as the first connecting rod 221 due to its length problem, and thus a commutation will occur, which can realize driving the first gear 223 to rotate forward half a turn and backward half a turn.

[0044] According to an embodiment of the present utility model, the torque M of the second link 222 = FR2sinθ; F is the force exerted by the first link 221 on the second end of the second link 222, and θ is the included angle between the first link 221 and the second link 222. At the second limit position, the included angle between the first link 221 and the second link 222 is 180°. When moving from the first limit position, the included angle between the first link 221 and the second link 222 is 0°. When the first link 221 moves from the second limit position to the first limit position, the included angle between the first link 221 and the second link 222 gradually decreases, and the second link 222 drives the second gear 224 to accelerate first and then decelerate.

[0045] It can be known from the variation law of the sine function that when θ changes from 180° to 90°, the value of sinθ gradually increases from 0 until θ reaches 90°, and sinθ reaches the maximum value of 1. Therefore, the torque change of the second link 222 also starts to increase from 0 to the maximum value. When θ changes from 90° to 0°, sinθ gradually decreases from the maximum value of 1 until θ reaches 0°, and sinθ reaches the minimum value of 0. Therefore, the torque change of the second link 222 also starts to decrease from the maximum value to 0. It can be seen that when the first link 221 moves from the second limit position to the first limit position, the torque of the second link experiences a process of increasing first and then decreasing, thereby driving the second gear 224 to accelerate first and then decelerate.

[0046] According to an embodiment of the present utility model, when the included angle θ between the first link 221 and the second link 222 reaches 90°, the motor stops for a time t1, and then continues to drive the first link 221 to move to the second limit position. The stop time of the motor can be designed according to actual requirements and will not be specifically limited here. When θ reaches 135°, after the force of the first link 221 acts on the second link 222, the torque of the second link 222 is very small, and the moving speed of the first gear 223 is very small. At this time, the motor is stopped, and the first gear 223 and the second gear 224 will not violently collide due to inertia, which can protect the first gear 223 and the second gear 224. Setting the stop time t of the motor at this position is to meet the requirement of setting an anti-pinch distance when the telescopic panel assembly is applied to the range hood.

[0047] According to an embodiment of the present utility model, please refer to Figure 1 , the moving assembly 11 includes a wheel shaft 111 rotatably connected to the telescopic panel 1 and a follower wheel 112 provided on the wheel shaft 111. The wheel shaft 111 is connected to the output end of the transmission assembly 22. A guide rack a1 is provided in the telescopic cavity a, and the follower wheel 112 meshes with the guide rack a1.

[0048] In specific applications, the axle 111 is connected to the second gear 224. When the second gear 224 rotates, the axle 111 rotates and drives the follower wheel 112 to rotate. The follower wheel 112 moves along the guiding gear a1, and causes the telescopic panel 1 to extend or retract into the telescopic cavity a. By making the moving assembly 11 include the follower wheel 112 and arranging the guiding gear in the telescopic cavity a, the accuracy and reliability of the extension and retraction of the telescopic panel 1 can be ensured.

[0049] Please refer to Figures 4 to 6 , the present utility model also discloses a range hood, which adopts the above-mentioned telescopic panel assembly. The range hood of the present utility model includes a range hood main body 3. The range hood main body 3 has a telescopic cavity a. The driving assembly 2 drives the telescopic panel 1 to extend or retract into the telescopic cavity a; a air curtain assembly and / or a PM2.5 detection module and / or a lighting assembly are arranged in the installation cavity of the telescopic panel 1. An air curtain air inlet 12 and an air curtain air outlet 13 corresponding to the air curtain assembly, and / or a detection air hole 14 corresponding to the PM2.5 detection module, and / or a lighting window 15 corresponding to the lighting assembly are arranged on the telescopic panel 1. When the telescopic panel 1 extends out of the telescopic cavity a, the air curtain air inlet 12 and the air curtain air outlet 13 of the air curtain assembly move out of the telescopic cavity a; or / and the detection air hole 14 of the PM2.5 detection module moves out of the telescopic cavity a; or / and the lighting window 15 moves out of the telescopic cavity a.

[0050] For the range hood of the present utility model, when the range hood is started, the driving assembly 2 is started. The driving assembly 2 drives the moving assembly 11 to move. The moving assembly 11 drives the telescopic panel 1 to extend out of the telescopic cavity a; when the range hood is shut down, the driving assembly 2 drives the moving assembly 11 to move. The moving assembly 11 drives the telescopic panel 1 to retract into the telescopic cavity a. By making the driving assembly 2 drive the moving assembly 11 to move, and making the moving assembly 11 accelerate to the maximum speed within the first moving distance and decelerate from the maximum speed to zero speed within the second moving distance, in this way, the telescopic panel assembly can perform a variable-speed movement every time it retracts, and the waiting time required for the telescopic panel assembly to fully retract can be effectively shortened.

[0051] Please refer to Figures 5 to 6, for the range hood of the present utility model, when the range hood is started and the telescopic panel 1 extends out of the telescopic inner cavity a, the air curtain suction port 12 and the air curtain outlet 13 of the air curtain assembly move out of the telescopic inner cavity a, the detection air hole 14 of the PM2.5 detection module moves out of the telescopic inner cavity a, and the lighting window 15 moves out of the telescopic inner cavity a. The air curtain assembly is started, and the air curtain assembly sucks air through the air curtain suction port 12 and discharges air downward through the air curtain outlet 13 to form an air curtain. The PM2.5 detection module sucks air through the detection air hole 14 to detect the PM2.5 concentration in the air, so as to feedback the purification effect of the range hood on lampblack during operation. The lighting assembly transmits light downward through the lighting window 15 to facilitate the user to observe the ingredients during cooking. After the user completes the cooking operation, the air curtain assembly is turned off, the PM2.5 detection module is turned off, the lighting assembly is turned off, and the driving assembly 2 drives the telescopic panel 1 to retract into the telescopic inner cavity a. After the telescopic panel 1 completely retracts into the telescopic inner cavity a, the driving assembly 2 stops operating.

[0052] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modification, equivalent replacement or improvement made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A telescopic panel assembly for a range hood, characterized in that: include: Telescopic inner cavity (a); A telescopic panel (1) is slidably connected in the telescopic inner cavity (a), and a moving component (11) is provided on the telescopic panel. The moving component (11) has a first state in which the telescopic panel (1) is extended out of the telescopic inner cavity (a) and a second state in which the telescopic panel (1) is retracted into the telescopic inner cavity (a). In the second state, the moving component (11) has a first moving distance and a second moving distance. Within the first moving distance, the moving component (11) is accelerated to a maximum speed. Within the second moving distance, the moving component (11) is reduced from the maximum speed to a speed of zero. A driving component (2) is disposed in the telescopic inner cavity (a) and is used to drive the moving component (11) to move in the telescopic inner cavity (a).

2. The telescopic panel assembly according to claim 1, characterized in that: The driving assembly (2) comprises a driving member (21) and a transmission assembly (22); the driving member (21) is a motor; the transmission assembly (22) comprises a first connecting rod (221), a second connecting rod (222), a first gear (223) and a second gear (224); the first end of the first connecting rod (221) is connected to the output end of the driving member (21); the second end of the first connecting rod (221) is connected to the first end of the second connecting rod (222); the second end of the second connecting rod (222) is rotationally connected to the first gear (223); the second gear (224) is meshed with the first gear (223); the central axis of the first gear (223) is rotationally connected to the telescopic inner cavity (a); and the second gear (224) is transmission-connected to the moving assembly (11).

3. The telescopic panel assembly according to claim 2, characterized in that: The first connecting rod (221) has a first extreme position and a second extreme position. In the first extreme position, the first end of the first connecting rod (221) is located between the first end and the second end of the second connecting rod (222); in the second extreme position, the second end of the first connecting rod (221) is located between the first end of the first connecting rod (221) and the second end of the second connecting rod (222). Each time the motor drives the first connecting rod (221) to rotate half a circle, the first connecting rod (221) completes one rotation from the first extreme position / second extreme position to the second extreme position / first extreme position. When the first connecting rod (221) moves from the first extreme position to the second extreme position, it drives the second connecting rod (222) to rotate in a first direction. When the first connecting rod (221) rotates from the second extreme position to the first extreme position, the second connecting rod (222) rotates in a second direction. The first direction and the second direction are opposite.

4. The telescopic panel assembly according to claim 3, characterized in that: After the second connecting rod (222) rotates to the first extreme position / the second extreme position, the telescopic panel (1) extends out of / retracts into the telescopic inner cavity (a), and the driving member (21) stops starting. When the driving member (21) starts again, the rotation direction of the first connecting rod (221) remains unchanged, the second connecting rod (222) swings in the opposite direction, and drives the second gear (224) to rotate in the opposite direction. The second gear (224) drives the moving component (11) to move in the opposite direction and causes the telescopic panel (1) to retract / extend into the telescopic inner cavity.

5. The telescopic panel assembly according to claim 3, characterized in that: The direction of rotation of the first connecting rod (221) driven by the motor remains unchanged; when the first connecting rod (221) rotates from the first extreme position to the second extreme position and then from the second extreme position to the first extreme position, the direction of rotation remains the same and a circular motion with the first connecting rod (221) as the radius is completed.

6. The telescopic panel assembly according to claim 5, characterized in that: In the first extreme position / the second extreme position, the second end of the second connecting rod (222) is located below the center of the second gear (224).

7. The telescopic panel assembly according to claim 6, characterized in that: The torque M of the second connecting rod (222) is FR2sinθ; F is the force applied by the first connecting rod (221) to the second end of the second connecting rod (222); θ is the angle between the first connecting rod (221) and the second connecting rod (222); when the first connecting rod (221) is at the second extreme position, the angle between the first connecting rod (221) and the second connecting rod (222) is 180°; when the first connecting rod (221) moves from the second extreme position to the first extreme position, the angle between the first connecting rod (221) and the second connecting rod (222) gradually decreases; the second connecting rod (222) drives the second gear (224) to first accelerate and then decelerate.

8. The telescopic panel assembly according to claim 7, characterized in that: When the angle θ between the first connecting rod (221) and the second connecting rod (222) reaches 90°, the motor stops for a time t1 and then continues to drive the first connecting rod (221) to move to the second extreme position.

9. The telescopic panel assembly according to claim 2, characterized in that: The moving assembly (11) comprises a wheel axle (111) rotatably connected to the telescopic panel (1) and a follower wheel (112) disposed on the wheel axle (111); the wheel axle (111) is connected to an output end of the transmission assembly (22); a guide rack (a1) is disposed in the telescopic inner cavity (a); and the follower wheel (112) is meshed with the guide rack (a1).

10. A range hood, using the telescopic panel assembly according to any one of claims 1 to 9, characterized in that: The invention comprises a range hood body (3), wherein the range hood body (3) has the telescopic inner cavity (a), and the driving component (2) drives the telescopic panel (1) to extend or retract into the telescopic inner cavity (a); a wind curtain component and / or a PM2.5 detection module and / or a lighting component are arranged in the installation cavity of the telescopic panel (1); a wind curtain air intake port (12) and a wind curtain air outlet port (13) corresponding to the wind curtain component, and / or a detection air hole (14) corresponding to the PM2.5 detection module, and / or a lighting window (15) corresponding to the lighting component are arranged on the telescopic panel (1); when the telescopic panel (1) extends out of the telescopic inner cavity (a), the wind curtain air intake port (12) and the wind curtain air outlet port (13) of the wind curtain component move out of the telescopic inner cavity (a); or / and the detection air hole (14) of the PM2.5 detection module move out of the telescopic inner cavity (a); or / and the lighting window (15) move out of the telescopic inner cavity (a).

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