Range hood

Abstract

The utility model discloses a range hood. The range hood comprises a range hood main body, a telescopic panel assembly and a movable baffle, the range hood body is provided with a top plate and a telescopic inner cavity located above the top plate, and an air suction opening is formed in the top plate. The telescopic panel assembly is connected into the telescopic inner cavity in a sliding mode. The movable baffle is slidably connected below the top plate and used for opening or closing the air suction opening. When the range hood is started, the telescopic panel assembly and the movable baffle synchronously move forwards, and the movement speed of the telescopic panel assembly is larger than that of the movable baffle, so that the displacement of the telescopic panel assembly is larger than that of the movable baffle within the same movement duration, and the telescopic panel assembly and the movable baffle can move forwards after moving in place. The telescopic panel assembly completely extends out of the telescopic inner cavity and is provided with a part located at the front end of the movable baffle, and at the moment, functional devices of the telescopic panel assembly are located in front of the movable baffle, so that effective operation of the functional devices of the telescopic panel assembly is guaranteed.

Description

Technical Field

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

[0002] To reduce the space occupied by the kitchen, existing range hoods feature retractable panel assemblies for functional modules such as lighting and air curtain fans. The main body of the range hood is equipped with a retractable inner cavity to house the panel assembly. When the range hood is in use, a drive mechanism drives the panel assembly to extend out of the retractable cavity, allowing functional components such as the lighting and air curtain fans to extend out of the retractable cavity and function normally. When the range hood is turned off, the drive mechanism retracts the panel assembly into the retractable cavity, reducing the space occupied by the panel assembly when the range hood is idle. Existing technology also employs a movable baffle to open the air intake when the range hood is in operation and close it when the range hood is off. However, in existing technology, when the range hood is turned on, the movable baffle easily blocks the lower front surface of the retractable panel assembly, affecting its effective operation. Utility Model Content

[0003] The purpose of the present utility model is to provide a range hood that is used to solve the above technical problems.

[0004] The utility model provides a range hood, comprising a range hood body, a telescopic panel assembly, and a movable baffle; the range hood body comprises a top plate and a telescopic inner cavity located above the top plate, and an air suction port is provided on the top plate; the telescopic panel assembly is slidably connected to the telescopic inner cavity; the movable baffle is slidably connected to the bottom of the top plate, and is used to open or close the air suction port;

[0005] When the range hood is turned on, the telescopic panel assembly extends out of the telescopic inner cavity, and the movable baffle moves synchronously with the telescopic panel assembly and opens the air intake port. The moving speed of the telescopic panel assembly is greater than the moving speed of the movable baffle. When the movable baffle opens the air intake port into place, the telescopic panel assembly extends entirely out of the telescopic inner cavity and has a portion located at the front end of the movable baffle. When the range hood is turned off, the telescopic panel assembly retracts into the telescopic inner cavity, and the movable baffle moves synchronously with the telescopic panel assembly and closes the air intake port. When the movable baffle closes the air intake port into place, the telescopic panel assembly retracts entirely into the telescopic inner cavity.

[0006] According to one embodiment of the present invention, a lighting assembly and / or an air curtain assembly and / or an air quality detection module is provided in the installation cavity of the telescopic panel assembly, a wind curtain air inlet hole corresponding to the wind curtain assembly and / or a detection hole corresponding to the air quality detection module is provided on the top plate of the telescopic panel assembly, and a wind curtain air outlet hole corresponding to the wind curtain assembly and / or a lighting window corresponding to the lighting assembly is provided on the bottom plate of the telescopic panel assembly; when the telescopic panel assembly is fully extended out of the telescopic inner cavity, the wind curtain air inlet hole and / or the detection hole on the top plate of the telescopic panel assembly moves out of the telescopic inner cavity, and the part of the bottom plate of the telescopic panel assembly where the wind curtain air outlet hole and / or the lighting window is provided is located at the front end of the movable baffle.

[0007] According to one embodiment of the present invention, the range hood also includes a drive assembly, which is arranged on the top plate and has a first output end and a second output end. The first output end is connected to the telescopic panel assembly, and the second output end is connected to the movable baffle. The first output end and the second output end have different output speeds so that the telescopic panel assembly and the movable baffle have different moving speeds.

[0008] According to one embodiment of the present utility model, the driving assembly includes a reduction motor, a first gear, a second gear, a first rack and a second rack. The output end of the reduction motor is connected to the first gear and the second gear at the same time. The wheel diameter of the first gear is larger than the wheel diameter of the second gear. The first gear is engaged with the first rack. The first rack forms the first output end of the driving assembly. The second gear is engaged with the second rack. The second rack forms the second output end of the driving assembly. The first rack is connected to the telescopic panel assembly, and the second rack is connected to the movable baffle.

[0009] According to one embodiment of the present invention, the displacement of the telescopic panel assembly when it is fully extended or retracted into the telescopic inner cavity is L1, and the displacement when the movable baffle opens the air intake port into place is L2. The wheel diameter of the first gear is R, and the wheel diameter of the second gear is r, R:r=L1:L2.

[0010] According to one embodiment of the present invention, a first guide member and a second guide member are further provided in the telescopic inner cavity. The first guide member and the second guide member are slidably connected in the telescopic inner cavity. The first rack is connected to the first guide member, and the second rack is connected to the second guide member.

[0011] According to one embodiment of the present invention, a baffle bracket is connected to the second guide member, and the baffle bracket is connected to the movable baffle.

[0012] According to one embodiment of the present invention, a avoidance groove corresponding to the baffle bracket is provided on the top plate, and the baffle bracket is slidably connected to the avoidance groove.

[0013] According to one embodiment of the present invention, the range hood body further includes a smoke collecting chamber provided above the top plate, and the air intake is connected to the smoke collecting chamber.

[0014] According to one embodiment of the present invention, the range hood further comprises an oil cup, an oil leakage hole is provided on the top plate, the oil leakage hole is connected to the smoke collecting chamber, the oil cup is connected to the top plate, and the opening of its accommodating chamber is aligned with the oil leakage hole.

[0015] Compared with the prior art, the range hood of this utility model has the following advantages:

[0016] When the range hood of the present invention is turned on, the telescopic panel assembly and the movable baffle move forward synchronously. Since the moving speed of the telescopic panel assembly is greater than the moving speed of the movable baffle, the displacement of the telescopic panel assembly will be greater than the displacement of the movable baffle within the same movement duration. Therefore, when the telescopic panel assembly and the movable baffle are moved into place, the telescopic panel assembly is completely extended out of the telescopic inner cavity and has a part located at the front end of the movable baffle. At this time, the functional components of the telescopic panel assembly are located in front of the movable baffle, thereby preventing the movable baffle from blocking the lower surface of the functional components of the telescopic panel assembly, so as to ensure the effective operation of the functional components of the telescopic panel assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of the range hood of the present utility model;

[0018] Figure 2 This is a schematic structural diagram of the range hood of the present invention from another direction;

[0019] Figure 3 This is a structural diagram of the range hood of the present invention from another direction;

[0020] Figure 4 It is a projection diagram of the cigarette lighter of the present invention in the closed state;

[0021] Figure 5 Schematic diagram of the movement process of the telescopic panel assembly and the movable baffle in the present invention;

[0022] Figure 6 This is a schematic diagram of the telescopic panel assembly and the movable baffle in the present invention after being moved into position;

[0023] Figure 7 It is a cross-sectional schematic diagram of the range hood of the present utility model;

[0024] Figure 8 This is a schematic diagram of the structure of the drive assembly in the present utility model;

[0025] Figure 9 for Figure 8 A partial enlarged view of point A in the middle;

[0026] Figure 10 This is a schematic structural diagram of the drive assembly in another direction of the present invention;

[0027] Figure 11 This is a structural diagram of the range hood body of the present invention after removing the movable baffle.

[0028] In the figure: a. telescopic inner cavity, b. smoke collection cavity, 1. range hood body, 11. top plate, 111. air inlet, 112. avoidance groove, 113. oil leakage hole, 2. telescopic panel assembly, 22. air inlet hole of air curtain, 23. detection hole, 24. air outlet hole of air curtain, 25. lighting window, 3. movable baffle, 4. drive assembly, 41. reduction motor, 42. first gear, 43. second gear, 44. first rack, 45. second rack, 46. first guide, 47. second guide, 48. baffle bracket, 5. oil cup.

[0029] The realization of the functions and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] The following diagrams illustrate various embodiments of the present invention. For clarity, many practical details will be included in the following description. However, it should be understood that these practical details are not intended to limit the present invention. In other words, in some embodiments of the present invention, these practical details are not essential. Furthermore, to simplify the drawings, some commonly used structures and components are depicted in simplified schematic form.

[0031] 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.

[0032] In addition, in the present invention, descriptions such as "first" and "second" are only used for descriptive purposes and do not specifically refer to the order or sequence, nor are they used to limit the present invention. 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 such feature. 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 invention.

[0033] 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:

[0034] This utility model discloses a range hood. Figures 1 to 7 , comprising a range hood body 1, a telescopic panel assembly 2 and a movable baffle 3; the range hood body 1 has a top plate 11 and a telescopic inner cavity a located above the top plate 11, with an air intake 111 provided on the top plate 11; the telescopic panel assembly 2 is slidably connected to the telescopic inner cavity a; the movable baffle 3 is slidably connected to the bottom of the top plate 11 for opening or closing the air intake 111;

[0035] When the range hood is turned on, the telescopic panel assembly 2 extends out of the telescopic inner cavity a, and the movable baffle 3 moves synchronously with the telescopic panel assembly 2 and opens the air intake port 111. The moving speed of the telescopic panel assembly 2 is greater than the moving speed of the movable baffle 3. When the movable baffle 3 opens the air intake port 111 into place, the telescopic panel assembly 2 fully extends out of the telescopic inner cavity a and has a part located at the front end of the movable baffle 3; when the range hood is turned off, the telescopic panel assembly 2 retracts into the telescopic inner cavity a, and the movable baffle 3 moves synchronously with the telescopic panel assembly 2 and closes the air intake port 111. When the movable baffle 3 closes the air intake port 111 into place, the telescopic panel assembly 2 fully retracts into the telescopic inner cavity a.

[0036] In this embodiment, the air intake 111 is located at the rear end of the top panel 11, relatively close to the wall, and vertically diagonally above the stovetop's gas outlet. The range hood body 1 also includes an air collection box assembly, which includes a smoke collection chamber b, which communicates with the air intake 111. A smoke exhaust fan is installed within the smoke collection chamber b. When the exhaust fan is in operation, it creates a negative pressure at the air intake 111. Cooking fumes are drawn into the smoke collection chamber b through the air intake 111 and ultimately exhausted by the exhaust fan.

[0037] In the smoke machine of the present invention, Figures 1 to 6 As shown, the range hood also includes an oil cup 5. An oil leak hole 113 is provided on the top plate 11. Oil leak hole 113 communicates with the smoke collection chamber b. The oil cup 5 is attached to the top plate 11, with the opening of its receiving chamber aligned with the oil leak hole 113. The oil cup 5 can be installed below the range hood body 1, specifically below the oil leak hole 113. During the exhaust process, the oil and water mixture in the smoke accumulates in the air collection chamber and on the volute of the exhaust fan, ultimately flowing through the oil leak hole 113 to the oil cup 5 for collection.

[0038] When the range hood of the present invention is turned on, the telescopic panel assembly 2 moves forward and extends out of the telescopic inner cavity a, and the functional components such as the air curtain and the lighting device on the telescopic panel assembly 2 extend out from the telescopic inner cavity a and can be used normally, the movable baffle 3 moves forward and opens the air suction port 111, and then the smoke exhaust fan runs, and the external oil smoke enters the smoke collecting chamber b of the range hood through the air suction port 111 and is discharged from the smoke collecting chamber b by the smoke exhaust fan. In the process of the oil smoke flowing through the smoke collecting chamber b, the oil liquid formed by the mixture of oil and water in the oil smoke will adhere to the air suction port 111, the inner wall surface of the smoke collecting chamber b and the volute of the smoke exhaust fan, and the inner wall surface of the smoke collecting chamber b will be discharged. The oil and the oil on the volute will gather at the bottom of the smoke collecting chamber b, and drip into the oil cup 5 through the oil leakage hole 113 connected to the smoke collecting chamber b and be collected by the oil cup 5. After the smoke machine is turned off, the telescopic panel assembly 2 retracts the telescopic inner cavity a, and the movable baffle 3 moves backward and closes the air intake port 111. The downward projection of the rear edge of the movable baffle 3 falls into the opening of the accommodating cavity of the oil cup 5. There is no negative pressure at the air intake port 111. The weight of the oil at the air intake port 111 overcomes its adhesion to the air intake port 111 and will drip downward and be caught by the movable baffle 3. The oil gathered on the movable baffle 3 flows into the oil cup 5 and is caught by the oil cup 5.

[0039] In the range hood of the present invention, the movable baffle 3 is movable relative to the top plate 11, that is, relative to the air intake port 111 on the top plate 11. The movable baffle 3 can slide to open or close the air intake port 111. When the range hood is started, the movable baffle 3 opens the air intake port 111 to allow the oil smoke to be normally drawn into the smoke collecting chamber b. As the oil smoke flows through the air intake port 111 into the smoke collecting chamber b, a mixture of oil and water in the oil smoke forms an oily liquid that adheres to the air intake port 111. When the range hood is in operation, the smoke exhaust fan creates a negative pressure in the smoke collecting chamber b, and the oily liquid adhering to the air intake port 111 does not drip downward. When the range hood is turned off, the exhaust fan stops running, and the movable baffle 3 closes the air inlet 111. The oil adhering to the air inlet 111 drips from the air inlet 111 after its gravity overcomes the adhesive force. The oil drips from the air inlet 111 and is caught by the movable baffle 3, preventing the oil from dripping onto the stovetop or the user's cookware. This prevents the oil from dripping out of the air inlet 111 and onto the stovetop, thereby affecting the user experience. Furthermore, closing the air inlet 111 by the movable baffle 3 when the range hood is turned off prevents foreign matter such as insects from entering the range hood and affecting the stability of its internal components. Furthermore, closing the air inlet 111 by the movable baffle 3 when the range hood is turned off also improves the range hood's aesthetics.

[0040] In the range hood of the present invention, the telescopic panel assembly 2 has a mounting cavity, and a functional device is installed in the mounting cavity. When the range hood is started, the functional device extends out of the telescopic inner cavity a along with the telescopic panel assembly 2. After the functional device is in operation, it can play an auxiliary role in the range hood's fume suction process, such as lighting, generating an air curtain, etc. When the range hood is turned off, the functional device stops running and retracts into the telescopic inner cavity a along with the telescopic panel assembly 2, so as to reduce the occupation of the kitchen space by the functional device when it is idle, and to provide a hidden protection effect for the functional device. The functional device is set according to the auxiliary function of the range hood, for example, it can be a lighting device, so that the distance moved by the telescopic panel assembly 2 when it extends out of the telescopic inner cavity a is greater than the distance moved forward when the movable baffle 3 opens the air intake port 111. After the range hood is turned on, the telescopic panel assembly 2 has a functional part located in front of the front edge of the movable baffle 3, and the functional device will not be blocked by the movable baffle 3, which can meet the requirements of setting functional devices for the range hood.

[0041] Please refer to Figure 2 and Figure 3 , a lighting assembly and / or an air curtain assembly and / or an air quality detection module is provided in the installation cavity of the telescopic panel assembly 2, a wind curtain air inlet hole 22 corresponding to the wind curtain assembly and / or a detection hole 23 corresponding to the air quality detection module is provided on the top plate 11 of the telescopic panel assembly 2, and a wind curtain air outlet hole 24 corresponding to the wind curtain assembly and / or a lighting window 25 corresponding to the lighting assembly is provided on the bottom plate of the telescopic panel assembly 2; when the telescopic panel assembly 2 is fully extended from the telescopic inner cavity a, the wind curtain air inlet hole 22 and / or the detection hole 23 on the top plate 11 of the telescopic panel assembly 2 moves out of the telescopic inner cavity a, and the part of the bottom plate of the telescopic panel assembly 2 with the wind curtain air outlet hole 24 and / or the lighting window 25 is located at the front end of the movable baffle 3.

[0042] The functional components of the retractable panel assembly 2 correspond to the portion of the base plate of the retractable panel assembly 2 where the air curtain outlet holes 24 and lighting window 25 are located. When the range hood is activated, the lighting assembly, air curtain assembly, and air quality detection module operate according to the settings or user selections, and the functional components enable the air curtain module and lighting module to function. When the air curtain assembly is activated, air above the retractable panel assembly 2 enters through the air curtain inlet holes 22 and is discharged by the air curtain assembly through the air curtain outlet holes 24, forming an air curtain below the base plate of the retractable panel assembly 2. The air curtain is located between the user and the stove, acting as a barrier to cooking fumes and preventing them from escaping. When the lighting assembly is in operation, light emitted by the lighting assembly shines downward through the lighting window 25, providing a brightly lit environment for the user. When the air quality detection module is started, the air above the telescopic panel assembly 2 enters the air quality detection module through the detection hole 23 and is detected by the air quality detection module. The air quality detected by the air quality detection module represents the air quality of the kitchen. When the range hood is running, the air quality detection module is started to detect the range hood's suction effect on oil smoke. When the range hood is turned off, the air quality detection module is started to play a patrol role to detect whether there is oil smoke backflow in the kitchen.

[0043] In the range hood of the present invention, the movable baffle 3 and the telescopic panel assembly 2 are started synchronously when the range hood is turned on and off. Since the telescopic panel assembly 2 needs to have a functional part located in front of the movable baffle 3 when the range hood is turned on, the moving speed of the telescopic panel assembly 2 needs to be greater than the moving speed of the movable baffle 3; correspondingly, when the range hood is turned off, the moving speed of the telescopic panel assembly 2 needs to be greater than the moving speed of the movable baffle 3. Only when the movable baffle 3 completely closes the air intake port 111 can the telescopic panel assembly 2 be completely retracted into the telescopic inner cavity a.

[0044] After the range hood is turned on, the telescopic panel assembly 2 and the movable baffle 3 move forward synchronously. Since the moving speed of the telescopic panel assembly 2 is greater than the moving speed of the movable baffle 3, the displacement of the telescopic panel assembly 2 will be greater than the displacement of the movable baffle 3 within the same movement duration. When the telescopic panel assembly 2 is fully extended from the telescopic inner cavity a, the distance D1 between the front end of the telescopic panel assembly 2 and the top plate 11 is greater than the distance D2 between the front edge of the movable baffle 3 and the top plate 11. At this time, the functional components of the telescopic panel assembly 2 are located in front of the movable baffle 3, thereby preventing the movable baffle 3 from blocking the lower surface of the functional components of the telescopic panel assembly 2 to ensure the effective operation of the functional components of the telescopic panel assembly 2.

[0045] After the cigarette smoke machine is turned off, the telescopic panel assembly 2 and the movable baffle 3 move backward synchronously. Since the moving speed of the telescopic panel assembly 2 is greater than the moving speed of the movable baffle 3, the displacement of the telescopic panel assembly 2 will be greater than the displacement of the movable baffle 3 within the same movement duration. The extra displacement of the telescopic panel assembly 2 compared to the movable baffle 3 will make up for the difference between D1 and D2 in the above-mentioned power-on state, so that when the telescopic panel assembly 2 is just completely retracted into the telescopic inner cavity a, the movable baffle 3 can just completely close the air intake port 111.

[0046] In the range hood of the present invention, the range hood further includes a drive assembly 4, which is disposed on the top plate 11 and has a first output end and a second output end. The first output end is connected to the telescopic panel assembly 2, and the second output end is connected to the movable baffle 3. The first output end and the second output end have different output speeds, so that the telescopic panel assembly 2 and the movable baffle 3 have different moving speeds. The first output end and the second output end output power through the same drive assembly 4, so that the telescopic panel assembly 2 and the movable baffle 3 can be driven by the same drive assembly 4 to achieve synchronous movement at different speeds, thereby simplifying the driving method of the telescopic panel assembly 2 and the movable baffle 3, and making the internal structure of the range hood body 1 simpler and more compact.

[0047] In the smoke machine of the present invention, Figures 8 to 11 As shown, the drive assembly 4 includes a reduction motor 41, a first gear 42, a second gear 43, a first rack 44 and a second rack 45. The output end of the reduction motor 41 is connected to the first gear 42 and the second gear 43 at the same time. The wheel diameter of the first gear 42 is larger than the wheel diameter of the second gear 43. The first gear 42 is engaged with the first rack 44. The first rack 44 forms the first output end of the drive assembly 4. The second gear 43 is engaged with the second rack 45. The second rack 45 forms the second output end of the drive assembly 4. The first rack 44 is connected to the telescopic panel assembly 2, and the second rack 45 is connected to the movable baffle 3.

[0048] The reduction motor 41 is an integrated unit of a reducer and an electric motor. The output speed of the reduction motor 41 can be adjusted according to actual needs. By controlling the output speed of the reduction motor 41, the movement speed of the telescopic panel assembly 2 and the movable baffle 3 can be controlled. The first gear 42 and the second gear 43 can rotate with the output end of the reduction motor 41. The first gear 42 is engaged with the first rack 44, and can convert the rotation of the output end of the reduction motor 41 into the linear motion of the first rack 44, so that the first rack 44 drives the telescopic panel assembly 2 to move linearly. The second gear 43 is engaged with the second rack 45, and can convert the rotation of the output end of the reduction motor 41 into the linear motion of the second rack 45, so that the second rack 45 drives the movable baffle 3 to move linearly.

[0049] Since the wheel diameter of the first gear 42 is larger than the wheel diameter of the second gear 43, at the same rotation speed, the linear speed of the first gear 42 is greater than the linear speed of the second gear 43, so that the movement speed of the first rack 44 engaged with the first gear 42 will also be greater than the movement speed of the second rack 45 engaged with the second gear 43, so that the movement speed of the telescopic panel assembly 2 is greater than the movement speed of the movable baffle 3.

[0050] When the driving assembly 4 is started, the reduction motor 41 drives the first gear 42 and the second gear 43 to rotate, and utilizes the meshing connection relationship to drive the first rack 44 and the second rack 45 to move. Since the telescopic panel assembly 2 is connected to the first rack 44, when the first rack 44 is driven and moved by the first gear 42, the first rack 44 also drives the telescopic panel assembly 2 connected thereto to move, and the telescopic panel assembly 2 extends or retracts from the telescopic inner cavity a. At the same time, it is connected to the movable baffle 3 by the second rack 45, and the second gear 43 rotates synchronously with the first gear 42. The second gear 43 simultaneously drives the second rack 45 to move, and the second rack 45 drives the movable baffle 3 to move. When the wheel diameter of the first gear 42 is larger than the wheel diameter of the second gear 43, the movement speed of the first rack 44 meshed with the first gear 42 will also be greater than the movement speed of the second rack 45 meshed with the second gear 43, so that the movement speed of the movable baffle 3 is less than the movement speed of the telescopic panel assembly 2.

[0051] In the range hood of the present invention, the displacement of the telescopic panel assembly 2 when it is fully extended or retracted into the telescopic inner cavity a is L1, and the displacement when the movable baffle 3 opens the air inlet 111 into place is L2. The wheel diameter of the first gear 42 is R, and the wheel diameter of the second gear 43 is r, R:r=L1:L2.

[0052] The displacement L1 when the telescopic panel assembly 2 is fully extended or retracted into the telescopic inner cavity a is the displacement of the first rack 44 each time it moves forward or backward. The displacement L2 when the movable baffle 3 opens or closes the air inlet 111 is the displacement of the second rack 45 each time it moves forward or backward. Under the same movement time, L1 = V1*t, L2 = V2*t, so L1:L2 = V1:V2, V1 is the movement speed of the first rack 44, and V2 is the movement speed of the second rack 45. The linear motion speed of the first rack 44 is equal to the linear speed of the first gear 42, and the linear motion speed of the second rack 45 is equal to the linear speed of the second gear 43. The linear speed of the first gear 42 is V1 = R*w1, and the linear speed of the second gear 43 is V2 = r*w2. w1 is the angular speed of the first gear 42, and w2 is the angular speed of the second gear 43. Therefore, L1:L2=R*w1:r*w2. Since the first gear 42 and the second gear 43 rotate coaxially, w1 and w2 are equal, that is, L1:L2=R:r.

[0053] In the smoke machine of the present invention, Figures 8 to 11 As shown, the telescopic inner cavity a is further provided with a first guide member 46 and a second guide member 47. The first guide member 46 and the second guide member 47 are slidably connected in the telescopic inner cavity a. The first rack 44 is connected to the first guide member 46, and the second rack 45 is connected to the second guide member 47. The telescopic inner cavity a is provided with a first guide groove and a second guide groove extending in the front-to-back direction. The first guide member 46 slides in cooperation with the first guide groove, and the second guide member 47 slides in cooperation with the second guide groove, thereby guiding the movement process of the first guide member 46 and the second guide member 47, preventing the sliding trajectory of the first guide member 46 and the second guide member 47 from deviating, thereby preventing the movement trajectory of the telescopic panel assembly 2 and the movable baffle 3 from deviating, and ensuring the movement stability of the telescopic panel assembly 2 and the movable baffle 3.

[0054] In the smoke machine of the present invention, Figures 8 to 11 As shown, a baffle bracket 48 is connected to the second guide member 47, and the baffle bracket 48 is connected to the movable baffle 3. A clearance groove 112 corresponding to the baffle bracket 48 is provided on the top plate 11, and the baffle bracket 48 is slidably connected within the clearance groove 112. The lower side of the baffle bracket 48 passes through the clearance groove 112 and is fixedly connected to the movable baffle 3. The second guide member 47 drives the movable baffle 3 to move synchronously through the baffle bracket 48.

[0055] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements or improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A range hood, characterized in that: include: A range hood body (1) comprises a top plate (11) and a telescopic inner cavity (a) located above the top plate (11); an air inlet (111) is provided on the top plate (11); a telescopic panel assembly (2) slidably connected within the telescopic inner cavity (a); A movable baffle (3) is slidably connected to the bottom of the top plate (11) and is used to open or close the air suction port (111); When the range hood is turned on, the telescopic panel assembly (2) extends out of the telescopic inner cavity (a), the movable baffle (3) moves synchronously with the telescopic panel assembly (2) and opens the air inlet (111), the moving speed of the telescopic panel assembly (2) is greater than the moving speed of the movable baffle (3), and when the movable baffle (3) opens the air inlet (111) to the right position, the telescopic panel assembly (2) fully extends out of the telescopic inner cavity (a) and has a portion located at the front end of the movable baffle (3); when the range hood is turned off, the telescopic panel assembly (2) retracts into the telescopic inner cavity (a), the movable baffle (3) moves synchronously with the telescopic panel assembly (2) and closes the air inlet (111), and when the movable baffle (3) closes the air inlet (111) to the right position, the telescopic panel assembly (2) fully retracts into the telescopic inner cavity.

2. The range hood according to claim 1, characterized in that: The installation cavity of the telescopic panel assembly (2) is provided with a lighting assembly and / or an air curtain assembly and / or an air quality detection module; the top plate of the telescopic panel assembly (2) is provided with an air curtain air inlet hole (22) corresponding to the air curtain assembly and / or a detection hole (23) corresponding to the air quality detection module; the bottom plate of the telescopic panel assembly (2) is provided with an air curtain air outlet hole (24) corresponding to the air curtain assembly and / or a lighting window (25) corresponding to the lighting assembly; when the telescopic panel assembly (2) is fully extended out of the telescopic inner cavity (a), the air curtain air inlet hole (22) and / or the detection hole (23) on the top plate of the telescopic panel assembly (2) moves out of the telescopic inner cavity (a), and the portion of the bottom plate of the telescopic panel assembly (2) provided with the air curtain air outlet hole (24) and / or the lighting window (25) is located at the front end of the movable baffle (3).

3. The range hood according to claim 1, characterized in that: The invention also includes a driving component (4), which is arranged on the top plate (11) and has a first output end and a second output end, wherein the first output end is connected to the telescopic panel component (2), and the second output end is connected to the movable baffle (3), and the first output end and the second output end have different output speeds, so that the telescopic panel component (2) and the movable baffle (3) have different moving speeds.

4. The range hood according to claim 3, characterized in that: The driving assembly (4) comprises a reduction motor (41), a first gear (42), a second gear (43), a first rack (44) and a second rack (45); the output end of the reduction motor (41) is connected to the first gear (42) and the second gear (43) at the same time; the wheel diameter of the first gear (42) is larger than the wheel diameter of the second gear (43); the first gear (42) is meshed with the first rack (44); the first rack (44) forms the first output end of the driving assembly (4); the second gear (43) is meshed with the second rack (45); the second rack (45) forms the second output end of the driving assembly (4); the first rack (44) is connected to the telescopic panel assembly (2); and the second rack (45) is connected to the movable baffle (3).

5. The range hood according to claim 4, characterized in that: The displacement of the telescopic panel assembly (2) when it is fully extended or retracted into the telescopic inner cavity (a) is L1, the displacement of the movable baffle (3) when it opens the air inlet (111) to its proper position is L2, the wheel diameter of the first gear (42) is R, the wheel diameter of the second gear (43) is r, and R:r=L1:L2.

6. The range hood according to claim 4, characterized in that: The telescopic inner cavity (a) is further provided with a first guide member (46) and a second guide member (47). The first guide member (46) and the second guide member (47) are slidably connected in the telescopic inner cavity (a). The first rack (44) is connected to the first guide member (46), and the second rack (45) is connected to the second guide member (47).

7. The range hood according to claim 6, characterized in that: A baffle bracket (48) is connected to the second guide member (47), and the baffle bracket (48) is connected to the movable baffle (3).

8. The range hood according to claim 7, characterized in that: The top plate (11) is provided with an avoidance groove (112) corresponding to the baffle bracket (48), and the baffle bracket (48) is slidably connected in the avoidance groove (112).

9. The range hood according to claim 1, characterized in that: The range hood body (1) further comprises a smoke collecting chamber (b) provided above the top plate (11), and the air inlet (111) is connected to the smoke collecting chamber (b).

10. The range hood according to claim 9, characterized in that: It also includes an oil cup (5), an oil leakage hole (113) is provided on the top plate (11), the oil leakage hole (113) is connected to the smoke collecting chamber (b), and the oil cup (5) is connected to the top plate (11), and the opening of its accommodating cavity is aligned with the oil leakage hole (113).

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