Telescopic panel assembly and range hood with same

Abstract

The utility model discloses a telescopic panel assembly and a range hood with the telescopic panel assembly. The telescopic panel assembly comprises a telescopic inner cavity and a telescopic outer cavity, the telescopic panel is slidably connected into the telescopic inner cavity, and racks are connected to the two sides of the telescopic panel; each driving assembly comprises a gear motor and a gear, the output end of the gear motor is connected with the gear, and the gear of each driving assembly is meshed with the rack on the corresponding side; the gear motors of the two driving assemblies are synchronously started to synchronously drive the gears connected with the output ends of the gear motors to rotate, and the gears rotate and drive the racks on the corresponding sides to drive the telescopic panels to slide along the telescopic inner cavities. Compared with the prior art, according to the telescopic panel assembly, the two sets of driving assemblies which are started at the same time are adopted to drive the telescopic panel to move, it is guaranteed that the two sides of the telescopic panel move synchronously, the Hall sensor and the radial magnetic ring monitor the moving distance of the rack driven by the gear, and it is guaranteed that the moving distances of the two sides of the telescopic panel are the same; and clamping stagnation of the telescopic panel in the moving process is avoided.

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] In order to save kitchen space, the existing range hood is provided with a telescopic panel, which extends out of the telescopic inner cavity of the range hood body when the range hood is started, and retracts into the telescopic inner cavity of the range hood body after the range hood is turned off. A driving mechanism is usually provided, which is used to drive the telescopic panel to extend or retract into the telescopic inner cavity. Commonly used driving mechanisms include a push rod mechanism, which pushes the telescopic panel to slide in the telescopic inner cavity. However, when the push rod pushes the telescopic mechanism from the middle of the telescopic panel, the two sides of the telescopic panel may not start synchronously, or the telescopic panel is not installed in parallel in the telescopic inner cavity due to the installation accuracy. When such a telescopic panel slides in the telescopic inner cavity, the telescopic panel will tilt, get stuck, generate noise, and make the gap between the two sides of the telescopic panel and the two sides of the telescopic inner cavity unbalanced. 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] A telescopic panel assembly, used for a range hood, comprising:

[0005] Telescopic inner cavity;

[0006] A telescopic panel is slidably connected in the telescopic inner cavity, and racks are connected on both sides of the panel;

[0007] Two sets of drive assemblies, each set of drive assemblies includes a reduction motor and a gear, the output end of the reduction motor is connected to the gear, and the gear of each set of drive assemblies is meshed with the rack on the corresponding side;

[0008] The reduction motors of the two drive components are started synchronously to synchronously drive the gears connected to their output ends to rotate. The gears rotate and drive the racks on the corresponding sides to drive the telescopic panels to slide along the telescopic inner cavity.

[0009] According to one embodiment of the utility model, a radial magnetic ring is installed at the end of the motor shaft of the reduction motor, and a Hall sensor is installed next to the radial magnetic ring. The Hall sensor is used to measure the speed of the reduction motor. The Hall sensors on the two reduction motors measure the speed of the reduction motors. The rotation angle of the output end of the corresponding reduction motor within the startup time can be detected, and then the moving distance of the telescopic panel driven by the rack in the telescopic inner cavity can be known when the gear drives the rack to move.

[0010] According to one embodiment of the utility model, it also includes a guide component, which is arranged on both side walls of the telescopic inner cavity, including a slide seat and a slide bar, the slide seat is fixedly connected to the both side walls of the telescopic inner cavity, the slide bar is slidably connected in the slide seat, the slide bar is connected to the telescopic panel, the slide bar is provided with a rack section, and the rack section is provided with a rack.

[0011] According to an embodiment of the utility model, a plurality of sliding blocks are evenly distributed on the upper and lower edges of the sliding bar, and the sliding blocks are slidably connected to the upper and lower walls of the sliding seat.

[0012] According to an embodiment of the utility model, rack segments are provided on the oppositely disposed surfaces of the slide bars on both sides, and the rotating shaft of the gear is vertically disposed and meshes with the rack on the rack segment on the corresponding side.

[0013] According to an embodiment of the present invention, the rack segment on each side protrudes toward the rack segment on the other side and extends out of the slide seat.

[0014] According to one embodiment of the utility model, connecting parts are extended backward on both sides of the telescopic panel, the connecting parts are connected to the slide bar, and avoidance holes are provided on the connecting parts, and the rack segments extend out of the avoidance holes.

[0015] A range hood adopts the above-mentioned telescopic panel assembly, comprising a range hood body, the range hood body having a telescopic inner cavity, and a driving assembly driving the telescopic panel to extend or retract into the telescopic inner cavity.

[0016] According to one embodiment of the utility model, a bellows bracket is provided in the telescopic inner cavity, the air collecting box of the range hood is provided on the bellows bracket, two motor brackets are connected to the bellows bracket, and the reduction motors on the corresponding sides are respectively fixedly connected to the motor brackets on the corresponding sides.

[0017] According to one embodiment of the utility model, a wind curtain assembly and / or a PM2.5 detection module and / or a lighting assembly is provided in the installation cavity of the telescopic panel, and a wind curtain air intake and a wind curtain air outlet corresponding to the wind 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 inner cavity, the wind curtain air intake and the wind curtain air outlet of the wind curtain assembly are moved out of the telescopic inner cavity; or / and the detection air hole of the PM2.5 detection module is moved out of the telescopic inner cavity; or / and the lighting window is moved out of the telescopic inner cavity.

[0018] Compared with the prior art, the telescopic panel assembly of the utility model has the following advantages:

[0019] The telescopic panel assembly of the utility model has racks on both sides of the telescopic panel, and the gears are driven to rotate by the synchronously started reduction motors, and force is applied to the telescopic panel by the gear-driven racks. As long as the two reduction motors are started synchronously, the arc lengths of the two gears rotating within the same time can be ensured to be the same, and the linear distances of the racks driven by the gears are also the same, so that the moving direction of the telescopic panel in the telescopic inner cavity is parallel to the center line along the front-to-back direction of the telescopic inner cavity, and the telescopic panel will not tilt in the telescopic inner cavity, so that the telescopic panel can move smoothly without getting stuck. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the telescopic panel assembly of the utility model;

[0021] Figure 2 It is a cross-sectional view of the telescopic panel assembly of the utility model;

[0022] Figure 3 for Figure 2 A magnified view of middle;

[0023] Figure 4 It is a cross-sectional view of the telescopic panel assembly of the utility model in another direction;

[0024] Figure 5 It is a schematic structural diagram of a range hood having a telescopic panel assembly of the utility model when the telescopic panel is retracted into the telescopic inner cavity;

[0025] Figure 6 It is a structural schematic diagram of a range hood having a telescopic panel assembly of the utility model when the telescopic panel extends out of the telescopic inner cavity;

[0026] Figure 7 It is a structural schematic diagram of another direction when the telescopic panel of the range hood having the telescopic panel assembly of the utility model extends out of the telescopic inner cavity;

[0027] In the figure: a. telescopic inner cavity, 1. telescopic panel, 11. connecting part, 12. air curtain suction port, 13. air curtain outlet, 14. detection air hole, 15. lighting window, 2. driving assembly, 21. reduction motor, 22. gear, 23. motor bracket, 3. guide assembly, 31. slide seat, 32. slide bar, 321. rack segment, 322. slider, 4. range hood body, 41. bellows bracket

[0028] The realization of the functions and advantages of the utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] The following will disclose multiple embodiments of the present invention with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not necessary. In addition, in order to simplify the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0030] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, in the present utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present utility model. They are 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 number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0032] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:

[0033] The utility model discloses a telescopic panel assembly for a range hood, see Figures 1 to 4The telescopic panel assembly includes a telescopic inner cavity a, a telescopic panel 1 and two groups of driving assemblies 2; the telescopic panel 1 is slidably connected in the telescopic inner cavity a, and racks are connected on both sides thereof; each group of driving assemblies 2 includes a reduction motor 21 and a gear 22, the output end of the reduction motor 21 is connected to the gear 22, and the gear 22 of each group of driving assemblies 2 is meshed with the rack on the corresponding side; the reduction motors 21 of the two groups of driving assemblies 2 are started synchronously to synchronously drive the gear 22 connected to the output end thereof to rotate, and the gear 22 rotates and drives the rack on the corresponding side to drive the telescopic panel 1 to slide along the telescopic inner cavity a. The telescopic panel assembly of the utility model, when applied to the range hood, the telescopic inner cavity a is arranged on the range hood body, when the range hood is started, the two groups of driving assemblies 2 are started synchronously, the reduction motors 21 of the two groups of driving assemblies are started synchronously and drive the gears 22 connected to the driving ends thereof to rotate, the gears 22 rotate and drive the racks on the corresponding sides to slide in the telescopic inner cavity a, the two sides of the telescopic panel 1 are subjected to force, the telescopic panel 1 begins to slide along the telescopic inner cavity a and extends out of the telescopic inner cavity a, after the telescopic panel 1 is fully extended out of the telescopic inner cavity, the two reduction motors 21 stop moving; after the range hood is turned off, the two groups of driving assemblies 2 are started again, the two reduction motors 21 are started, and drive the gears 22 connected to the driving ends thereof to rotate, the gears 22 rotate and apply a force to the racks to move into the telescopic inner cavity a, the two sides of the telescopic panel 1 are subjected to force and begin to slide into the telescopic inner cavity a, after the telescopic panel 1 is fully retracted into the telescopic inner cavity a, the reduction motors 21 stop moving.

[0034] The telescopic panel assembly of the utility model has racks on both sides of the telescopic panel 1, and the gear 22 is driven to rotate by the synchronously started reduction motor 21, and the gear 22 drives the rack to apply force to the telescopic panel 1. As long as the two reduction motors 21 are started synchronously, the arc lengths of the two gears 22 rotating within the same time can be ensured to be the same, and the linear distances of the racks driven by the gear 22 are also the same, which can ensure that the moving direction of the telescopic panel 1 in the telescopic inner cavity a is parallel to the center line along the front-to-back direction of the telescopic inner cavity a, and the telescopic panel 1 will not tilt in the telescopic inner cavity a, which can ensure that the telescopic panel 1 moves smoothly without getting stuck.

[0035] In the telescopic panel assembly of the utility model, a radial magnetic ring is installed at the end of the motor shaft of the reduction motor 21, and a Hall sensor is installed next to the radial magnetic ring. The Hall sensor is used to measure the speed of the reduction motor 21. The Hall sensors on the two reduction motors 21 measure the speed of the reduction motor 21, and can detect the rotation angle of the output end of the corresponding reduction motor 21 within the startup time, and then know the moving distance of the telescopic panel 1 driven by the rack when the gear 22 drives the rack to move in the telescopic inner cavity a. When the reduction motor 21 is started, the magnetic field generated by the radial magnetic ring changes continuously. The Hall sensor detects the arc length of the motor shaft rotation according to the change of the magnetic field, and then calculates the arc length of the gear 22 driven by the reduction motor 21. According to the arc length of the gear 22, the distance that the rack drives the telescopic panel 1 to move can be calculated when the gear 22 drives the rack. The length of the telescopic panel 1 can be detected in real time when the two sides are driven by the gear 22 to ensure that the moving lengths of the two sides of the telescopic panel 1 are consistent, and due to the interaction between the Hall sensor and the radial magnetic ring, the Hall sensor can also monitor whether the two reduction motors 21 are started synchronously.

[0036] See also Figures 1 to 4 The telescopic panel assembly of the utility model also includes a guide assembly 3, which is arranged on the two side walls of the telescopic inner cavity a, including a slide 31 and a slide bar 32. The slide 31 is fixedly connected to the two side walls of the telescopic inner cavity a, and the slide bar 32 is slidably connected in the slide 31. The slide bar 32 is connected to the telescopic panel 1, and a rack section 321 is provided on the slide 32, and a rack is provided on the rack section 321. When the reduction motor 21 is started, the gear 22 is started, and the gear 22 applies a force toward or away from the telescopic inner cavity a to the rack. Under this force, the slide bar 32 moves toward the telescopic inner cavity a or extends out of the telescopic inner cavity a along the slide 31, thereby driving the telescopic panel 1 to retract or extend out of the telescopic inner cavity. And under the guiding action of the guide assembly 3, the friction between the telescopic panel 1 and the telescopic inner cavity a becomes smaller, and the telescopic panel 1 moves more smoothly when extending or retracting the telescopic inner cavity a.

[0037] See also Figure 2 In the telescopic panel assembly of the utility model, a plurality of sliders 322 are evenly distributed on the upper and lower edges of the slide bar 32, and the sliders 322 are slidably connected with the upper and lower walls of the slide seat 31. When the slide bar 32 slides along the slide seat 31, the sliders 322 contact the upper and lower walls of the slide seat 31, which can reduce the friction between the slide bar 32 and the slide seat 31, and the slide bar 32 slides more smoothly.

[0038] See also Figure 2In the telescopic panel assembly of the utility model, rack segments 321 are provided on the oppositely disposed surfaces of the slide bars 32 on both sides, and the rotating shaft of the gear 22 is vertically disposed and meshes with the rack on the rack segment 321 on the corresponding side. The rack segments 321 are disposed on the two oppositely disposed surfaces of the slide bar 32, so that the gear shaft of the gear 22 can be disposed vertically, which is convenient for the installation of the gear 22, and when the drive assembly 2 needs to be repaired, the connection end of the gear shaft in the telescopic inner cavity a is loosened, and the gear 22 is moved upward, so that the gear 22 can be separated from the rack; when the gear 22 needs to be connected to the rack, the gear 22 is moved vertically downward to mesh with the rack, which is convenient for assembly.

[0039] See also Figure 2 and Figure 3 In the telescopic panel assembly of the utility model, the rack segment 321 on each side protrudes toward the rack segment 321 on the other side and extends out of the slide 31. The rack segment 321 protrudes outward from the inside of the slide 31, and the rack on the rack segment 321 is located outside the slide 31. When the gear 22 is engaged with the rack, the remaining part of the rack engaged is located outside the slide 31, which will not affect the assembly or disengagement of the gear 32 and the rack.

[0040] See also Figures 1 to 4 In the telescopic panel assembly of the utility model, the two sides of the telescopic panel 1 are extended backward with connecting parts 11, the connecting parts 11 are connected to the slide bar 32, the connecting parts 11 are provided with an avoidance hole, and the rack segment 321 extends from the avoidance hole. When the reduction motor 21 is started, the gear 22 is started, and the gear 22 exerts a force on the rack toward or away from the telescopic inner cavity a. Under this force, the slide bar 32 moves toward or extends out of the telescopic inner cavity a along the slide seat 31, and the connecting part 11 moves with the slide bar 32 on the corresponding side, moves toward or extends out of the telescopic inner cavity a, and then drives the telescopic panel 1 to retract or extend out of the telescopic inner cavity.

[0041] The telescopic panel assembly of the utility model adopts two sets of driving assemblies 2 that are started simultaneously to drive the telescopic panel 1 to move, which can ensure that the two sides of the telescopic panel 1 move synchronously, and the distance that the rack moves driven by the Hall sensor and the radial magnetic ring monitoring gear 22 can ensure that the moving distance of the two sides of the telescopic panel 1 is the same, so that the telescopic panel 1 will not tilt when moving in the telescopic inner cavity a, and the telescopic panel 1 will avoid getting stuck during the movement process.

[0042] See also Figures 5 to 7The utility model also discloses a range hood. The range hood disclosed in the utility model adopts the above-mentioned telescopic panel assembly, including a range hood body 4. The range hood body 4 has a telescopic inner cavity a. The driving assembly 2 drives the telescopic panel 1 to extend or retract the telescopic inner cavity a. The range hood of the utility model, when the range hood is started, the two drive components 2 are started synchronously, the reduction motors 21 of the two drive components are started synchronously and drive the gears 22 connected to the drive ends thereof to rotate, the gears 22 rotate and drive the racks on the corresponding sides to slide in the telescopic inner cavity a, the two sides of the telescopic panel 1 are subjected to force, the telescopic panel 1 begins to slide along the telescopic inner cavity a and extends out of the telescopic inner cavity a, after the telescopic panel 1 is fully extended out of the telescopic inner cavity a, the two reduction motors 21 stop moving; after the range hood is turned off, the two drive components 2 are started again, the two reduction motors 21 are started, and drive the gears 22 connected to the drive ends thereof to rotate, the gears 22 rotate and apply force to the racks to move into the telescopic inner cavity a, the two sides of the telescopic panel 1 are subjected to force and begin to slide into the telescopic inner cavity a, after the telescopic panel 1 is fully retracted into the telescopic inner cavity a, the reduction motors 21 stop moving. When the reduction motor 21 is started, the Hall sensor monitors the rotation arc length of the gear 22 driven by the reduction motor 21 through the magnetic field changes of the radial magnetic ring, and then can calculate the moving distance of the telescopic panel 1 driven by the gear 22 through the rack, and detect whether the moving distances on both sides of the telescopic panel 1 are equal, which can avoid the telescopic panel 1 from being stuck when moving in the telescopic inner cavity a.

[0043] See also Figure 1 In the range hood of the present invention, a bellows bracket 41 is provided in the telescopic inner cavity a, and the air collecting box of the range hood is provided on the bellows bracket 41. Two motor brackets 23 are connected to the bellows bracket 41, and the reduction motors 21 on the corresponding sides are fixedly connected to the motor brackets 23 on the corresponding sides. The bellows bracket 41 divides the telescopic inner cavity a into a front part and a rear part, and the telescopic panel 1 is slidably connected to the front part of the telescopic inner cavity a. The motor bracket 23 is provided on the rear side of the bellows bracket 41, so that the reduction motor 21 can be fixed and the reduction motor 21 can be prevented from affecting the retraction of the telescopic panel 1 into the telescopic inner cavity a. The installation of the air collecting box in the range hood body 4 is not affected.

[0044] See also Figure 6 and Figure 7In the range hood of the utility model, a wind curtain assembly and / or a PM2.5 detection module and / or a lighting assembly is arranged in the installation cavity of the telescopic panel 1, and a wind curtain air intake port 12 and a wind curtain air outlet 13 corresponding to the wind 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 inner cavity a, the wind curtain air intake port 12 and the wind curtain air outlet 13 of the wind curtain assembly are moved out of the telescopic inner cavity a; or / and the detection air hole 14 of the PM2.5 detection module is moved out of the telescopic inner cavity a; or / and the lighting window 15 is moved out of the telescopic inner cavity a.

[0045] exist Figure 7 In the illustrated embodiment, a wind curtain assembly, a PM2.5 detection module and a lighting assembly are provided in the installation cavity of the telescopic panel 1. A wind curtain suction port 12 and a wind curtain outlet 13 corresponding to the wind curtain assembly, a detection air hole 14 corresponding to the PM2.5 detection module and a lighting window 15 corresponding to the lighting assembly are provided on the telescopic panel 1. When the telescopic panel 1 extends out of the telescopic inner cavity a, the wind curtain suction port 12 and the wind curtain outlet 13 of the wind curtain assembly are moved out of the telescopic inner cavity a, the detection air hole 14 of the PM2.5 detection module is moved out of the telescopic inner cavity a and the lighting window 15 is moved out of the telescopic inner cavity a. The wind curtain assembly is started, the wind curtain assembly draws air through the wind curtain suction port 12, and exhausts air downward through the wind curtain outlet 13 to form a wind curtain. The PM2.5 detection module draws air through the detection air hole 14 to detect the PM2.5 concentration in the air to feedback the purification effect of the range hood on the oil fume when it is working. The lighting assembly transmits light downward through the lighting window 15, which is convenient for users to observe the ingredients being cooked. After the user completes the cooking operation, the air curtain assembly is closed, the PM2.5 detection module is turned off, the lighting assembly is turned off, and the drive assembly 2 drives the telescopic panel 1 to retract into the telescopic inner cavity a. After the telescopic panel 1 is completely retracted into the telescopic inner cavity a, the drive assembly 2 stops moving.

[0046] In the range hood of the present invention, the detection air hole 14 is arranged on the upper surface of the telescopic panel 1, and the air entering the detection air hole 14 is the air above the telescopic panel 1. When the air curtain assembly is started and the smoke exhaust fan of the range hood is started, the air quality above the telescopic panel 1 represents the purification of the oil fume by the range hood and the escape of the oil fume. When the result detected by the PM2.5 detection module meets the standard, it indicates that there is no oil fume escape; when the result detected by the PM2.5 detection module does not meet the standard, it indicates that there is oil fume escape.

[0047] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

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 to the telescopic inner cavity (a), and racks are connected to both sides of the panel; Two groups of drive assemblies (2), each group of the drive assemblies (2) comprises a reduction motor (21) and a gear (22), the output end of the reduction motor (21) is connected to the gear (22), and the gear (22) of each group of the drive assemblies (2) is meshed with a rack on a corresponding side; The reduction motors (21) of the two groups of driving assemblies (2) are started synchronously to synchronously drive the gears (22) connected to their output ends to rotate. The gears (22) rotate and drive the racks on the corresponding sides to drive the telescopic panels (1) to slide along the telescopic inner cavity (a).

2. The telescopic panel assembly according to claim 1, characterized in that: The end of the motor shaft of the reduction motor (21) is provided with a radial magnetic ring, and a Hall sensor is provided next to the radial magnetic ring. The Hall sensor is used to measure the speed of the reduction motor (21). The two Hall sensors on the reduction motor (21) measure the speed of the reduction motor (21) and can detect the rotation angle of the output end of the corresponding reduction motor (21) within the start-up time, thereby knowing the moving distance of the telescopic panel (1) driven by the gear (22) in the telescopic inner cavity (a).

3. The telescopic panel assembly according to claim 1, characterized in that: The invention also comprises a guide assembly (3), wherein the guide assembly (3) is arranged on the two side walls of the telescopic inner cavity (a), and comprises a slide seat (31) and a slide bar (32), wherein the slide seat (31) is fixedly connected to the two side walls of the telescopic inner cavity (a), and the slide bar (32) is slidably connected in the slide seat (31), and the slide bar (32) is connected to the telescopic panel (1), and a rack section (321) is arranged on the slide bar (32), and the rack section (321) is arranged on the rack.

4. The telescopic panel assembly according to claim 3, characterized in that: A plurality of sliding blocks (322) are evenly distributed on the upper and lower edges of the sliding bar (32), and the sliding blocks (322) are slidably connected to the upper and lower wall surfaces of the sliding seat (31).

5. The telescopic panel assembly according to claim 3, characterized in that: The rack segments (321) are provided on the oppositely arranged surfaces of the slide bars (32) on both sides, and the rotating shaft of the gear (22) is vertically arranged and meshes with the rack on the rack segment (321) on the corresponding side.

6. The telescopic panel assembly according to claim 5, characterized in that: The rack segment (321) on each side protrudes toward the rack segment (321) on the other side and extends out of the slide seat (31).

7. The telescopic panel assembly according to claim 6, characterized in that: Connecting parts (11) are extended backwards on both sides of the telescopic panel (1), the connecting parts (11) are connected to the sliding bar (32), and avoidance holes are provided on the connecting parts (11), and the rack segments (321) extend out of the avoidance holes.

8. A range hood, using the telescopic panel assembly according to any one of claims 1 to 7, characterized in that: It comprises a range hood body (4), the range hood body (4) having the telescopic inner cavity (a), and the driving component (2) driving the telescopic panel (1) to extend or retract into the telescopic inner cavity (a).

9. The range hood according to claim 8, characterized in that: A bellows bracket (41) is provided in the telescopic inner cavity (a), and the air collecting box of the range hood is provided on the bellows bracket (41). Two motor brackets (23) are connected to the bellows bracket (41), and the reduction motors (21) on the corresponding sides are respectively fixedly connected to the motor brackets (23) on the corresponding sides.

10. The range hood according to claim 8, characterized in that: The installation cavity of the telescopic panel (1) is provided with a wind curtain assembly and / or a PM2.5 detection module and / or a lighting assembly. The telescopic panel (1) is provided with a wind curtain air intake port (12) and a wind curtain air outlet port (13) corresponding to the wind 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. 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 assembly are moved out of the telescopic inner cavity (a); or / and the detection air hole (14) of the PM2.5 detection module is moved out of the telescopic inner cavity (a); or / and the lighting window (15) is moved out of the telescopic inner cavity (a).

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