Range hood

Abstract

When the range hood is turned off, a movable baffle plate closes an air suction opening and receives oil dripping from the movable baffle plate, so that the oil at the air suction opening can be prevented from dripping onto a stove body, and the user experience can be improved; in addition, the movable baffle closes the exhaust inlet when the range hood is turned off, so that foreign matters such as insects can be prevented from entering the range hood to influence the stability of internal functional devices of the range hood; in addition, the top plate of the range hood has a complete appearance surface, so that the attractiveness of the range hood can be improved. The oil cup can move back and forth, when the range hood is turned on, the oil cup moves backwards, the movable baffle moves forwards and opens the exhaust inlet, the oil cup does not affect the exhaust inlet, and when the range hood is turned off, the oil cup moves forwards, and the downward projection of the rear edge of the movable baffle falls into the opening of the containing cavity of the oil cup. When the oil liquid gathered on the movable baffle drops downwards through the rear edge of the movable baffle, the oil liquid can be received by the oil cup, and the oil liquid on the movable baffle does not drop onto the cooking bench, so that the user experience can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and in particular to a range hood. Background Art

[0002] In order to reduce the occupation of kitchen space, the existing range hoods are provided with panel components of functional modules such as lighting, air curtain fans, etc., which are arranged in a retractable form. The main body of the range hood is provided with a retractable inner cavity for accommodating the panel components. When the range hood is in use, the driving mechanism drives the panel components to extend out of the retractable inner cavity, so that the functional parts such as the lighting and air curtain fans extend out of the retractable inner cavity and are used normally. When the range hood is turned off, the driving mechanism drives the panel components to retract into the retractable inner cavity to reduce the occupation of kitchen space by the panel components when the range hood is in an idle state. In addition, the air intake of the top suction range hood is arranged on the top plate of the range hood main body. When the range hood is in operation, the oil smoke enters the smoke collecting cavity of the range hood through the air intake. The oil liquid formed by the mixture of oil and water in the oil smoke gathers at the edge of the air intake. When the range hood is in operation, under the action of the air flow in the popular air collecting box, the oil liquid at the air intake will not drip downwards. However, when the range hood is turned off, when the air flow at the air intake gathers to a certain amount, it will drip from the air intake, affecting the user experience. Summary of the invention

[0003] The purpose of the present invention is to provide a range hood for solving the above-mentioned technical problems.

[0004] The range hood includes a range hood body, which has a top plate and a telescopic inner cavity located above the top plate, and an air inlet and an oil dripping hole are provided on the top plate;

[0005] A telescopic panel assembly slidably connected to the telescopic inner cavity;

[0006] A movable baffle, which is slidably connected to the top plate and is used to open or close the air suction port;

[0007] An oil cup is slidably connected to the top plate, and the opening of its accommodating cavity is always aligned with the oil dripping hole;

[0008] Among them, when the range hood is turned on, the telescopic panel assembly moves forward and extends out of the telescopic inner cavity, the movable baffle moves forward and opens the air intake port, and the oil cup moves backward; when the range hood is turned off, the telescopic panel assembly moves backward and retracts into the telescopic inner cavity, the movable baffle moves backward and closes the air intake port, the oil cup moves forward and makes the downward projection of the rear edge of the movable baffle fall into the opening of its accommodating cavity.

[0009] According to one embodiment of the present invention, the distance moved by the telescopic panel assembly when extending out of the telescopic inner cavity is greater than the distance moved forward when the movable baffle opens the air intake port. After the range hood is turned on, the telescopic panel assembly has a functional part located in front of the movable baffle.

[0010] According to one embodiment of the present invention, a lighting assembly and / or a wind curtain assembly and / or an air quality detection module are 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 are 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 are provided on the bottom plate of the functional part of the telescopic panel assembly; when the functional part of the telescopic panel assembly extends out of the telescopic inner cavity, the lighting assembly and / or the wind curtain assembly and / or the air quality detection module extend out of the telescopic inner cavity along with the telescopic panel assembly.

[0011] According to one embodiment of the present invention, the length of the functional part is L1. When the range hood is started, after the functional part extends out of the telescopic inner cavity, the movable baffle begins to move a distance L2 with the telescopic panel assembly and opens the air intake port. When the range hood is turned off, after the movable baffle moves a distance L2 with the telescopic panel assembly, the movable baffle closes the air intake port and stops running, and the telescopic panel assembly continues to move a distance L1 and retracts into the telescopic inner cavity.

[0012] According to one embodiment of the present invention, the range hood further includes a driving component and a first linkage component, the driving component being used to drive the telescopic panel component, the first linkage component being used to drive the mobile baffle, the driving component having a linkage driving member, when the range hood is turned on, the driving component drives the telescopic panel component to extend out of the telescopic inner cavity to a length of L1, the linkage driving member then starts the first linkage component, the first linkage component drives the mobile baffle, when the range hood is turned off, the first linkage component drives the mobile baffle to move with the telescopic panel component a distance L2 and then disconnects from the linkage driving member, the telescopic panel component continues to move a distance L1 and retracts into the telescopic inner cavity.

[0013] According to one embodiment of the present invention, the driving assembly includes a driving motor, a driving gear, a driving rack and a first guide member. The driving motor is arranged above the top plate, and its output end is connected to the driving gear. The first guide member is slidably connected to the telescopic inner cavity, the driving rack is connected to the first guide member and meshes with the driving gear, the telescopic panel assembly is connected to the driving rack, the first linkage assembly includes a transmission gear, a transmission rack, a second guide member and a first linkage plate, the transmission gear is coaxially connected to the gear shaft of the driving gear, the second guide member is slidably connected to the top plate, the first linkage plate is connected to the second guide member, the transmission rack is connected to the first linkage plate, and the movable baffle is connected to the first linkage plate. When the range hood is started, after the first guide member moves a displacement of L1, the linkage driving member begins to act on the second guide member of the first linkage assembly, and drives the second guide member to move forward, and makes the transmission rack mesh with the transmission gear, and the first linkage assembly is linked with the driving assembly.

[0014] According to one embodiment of the present invention, the driving assembly includes a driving motor, a driving gear, a driving rack and a first guide member. The driving motor is arranged above the top plate, and its output end is connected to the driving gear. The first guide member is slidably connected to the telescopic inner cavity. The driving rack is connected to the first guide member and meshes with the driving gear. The telescopic panel assembly is connected to the driving rack. The linkage driving member is arranged on the telescopic panel assembly, and a sliding groove is provided on it. The first linkage assembly includes a connecting pin, a guide member and a sliding member. The guide member is arranged above the top plate, and the sliding member is slidably connected to the guide member. The movable baffle is connected to the sliding member, and a connecting pin is provided on the sliding member. The connecting pin is slidably connected to the sliding groove. The sliding groove has a first end close to the telescopic panel assembly and a second end away from the telescopic panel assembly. When the range hood is turned on, the connecting pin is located at the first end of the sliding groove. When the connecting pin slides relative to the sliding groove to the second end of the sliding groove, the linkage driving member drives the sliding member to move with the telescopic panel assembly.

[0015] According to one embodiment of the present invention, the range hood also includes a driving component and a first linkage component, the driving component is used to drive the telescopic panel component, the first linkage component is used to drive the mobile baffle, the driving component and the first linkage component synchronously drive the telescopic panel component and the mobile baffle to move, and the moving speed of the telescopic panel assembly is greater than the moving speed of the mobile baffle.

[0016] According to one embodiment of the present invention, the driving assembly includes a driving motor, a driving gear, a driving rack and a first guide member. The driving motor is arranged above the top plate, and its output end is connected to the driving gear. The first guide member is slidably connected to the telescopic inner cavity. The driving rack is connected to the first guide member and meshes with the driving gear. The telescopic panel assembly is connected to the driving rack. The first linkage assembly includes a transmission gear, a transmission rack, a second guide member and a first linkage plate. The transmission gear is coaxially connected to the gear shaft of the driving gear. The second guide member is slidably connected to the top plate, the first linkage plate is connected to the second guide member, the transmission rack is connected to the first linkage plate, and the movable baffle is connected to the first linkage plate. When the transmission rack meshes with the transmission gear, the first linkage plate drives the movable baffle to move. The wheel diameter R of the driving gear is greater than the wheel diameter r of the transmission gear, R:r=L3:L2, wherein L3 is the displacement of the telescopic panel assembly when it extends / retracts the telescopic inner cavity, and L2 is the displacement of the movable baffle when it opens / closes the air intake port.

[0017] According to one embodiment of the present invention, the range hood includes a second linkage assembly, the second linkage assembly includes a first follower rack, a second follower rack, a follower gear and a third guide member, the movable baffle has a first linkage plate, the first follower rack is arranged on the first linkage plate, the third guide member is slidably connected to the top plate, the second follower rack is connected to the third guide member, the follower gear is rotatably connected to the top plate and is located between the first follower rack and the second follower rack, the follower gear is meshed with the first follower rack and the second follower rack at the same time, and the oil cup is connected to the third guide member.

[0018] Compared with the prior art, the range hood of the present invention has the following advantages:

[0019] 1. For the range hood of the present invention, when the range hood is turned off, the movable baffle closes the air intake port and receives the oil dripping from the movable baffle, thereby preventing the oil at the air intake port from dripping onto the stove body, thereby improving the user experience; in addition, the movable baffle closes the air intake port when the range hood is turned off, thereby preventing foreign objects such as insects from entering the range hood and affecting the stability of the internal functional components of the range hood; in addition, the top plate of the range hood has a complete appearance surface, thereby improving the aesthetics of the range hood.

[0020] 2. The oil cup of the range hood of the present invention can move forward and backward. When the range hood is turned on, the oil cup moves backward, and the movable baffle moves forward to open the air intake port. The oil cup will not affect the air intake port. When the range hood is turned off, the oil cup moves forward and makes the downward projection of the rear edge of the movable baffle fall into the opening of its accommodating cavity. The oil gathered on the movable baffle can be caught by the oil cup when dripping downward through the rear edge of the movable baffle, and the oil on the movable baffle will not drip onto the stove top, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is an axonometric view of the range hood of the present invention when the air inlet is closed;

[0022] Figure 2 This is an axonometric view of the range hood of the present invention when the air intake port is open;

[0023] Figure 3 It is a partial structural diagram of the range hood of the present invention;

[0024] Figure 4 An axonometric view of a portion of the telescopic panel assembly of the range hood of the present invention extending out;

[0025] Figure 5 It is a schematic diagram of the range hood of the present invention in a shutdown state;

[0026] Figure 6 A side view of the range hood of the present invention in which a portion of the telescopic panel assembly is extended and the movable baffle has not yet opened the air intake port;

[0027] Figure 7 It is a schematic diagram of the range hood of the present invention in the powered-on state;

[0028] Figure 8 It is a cross-sectional view of the range hood of the present invention in a powered-on state;

[0029] Fig. 9 It is a first partial structural diagram of an embodiment of a range hood of the present invention;

[0030] Fig.10 for Fig. 9 The right part is an enlarged view of the local structure;

[0031] Fig.11 A second partial structural diagram of an embodiment of a range hood of the present invention;

[0032] Fig.12 for Fig.11 The right part is an enlarged view of the local structure;

[0033] Fig.13 It is a partial structural diagram of another embodiment of the range hood of the present invention;

[0034] Fig.14 for Fig.13 The right part is an enlarged view of the local structure;

[0035] Fig.15 It is a first partial structural diagram of another embodiment of the range hood of the present invention;

[0036] Fig.16 for Fig.15 The right part is an enlarged view of the local structure;

[0037] Fig.17 A second partial structural diagram of another embodiment of the range hood of the present invention;

[0038] Fig.18 for Fig.17 Enlarged view of the local structure on the right.

[0039] In the figure: a, telescopic inner cavity; 1, range hood body; 11, top plate; 111, air inlet; 112, oil drip hole; 113, first avoidance groove; 114, second avoidance groove; 2, telescopic panel assembly; 22, air inlet hole of wind curtain; 23, detection hole; 24, air outlet hole of wind curtain; 25, lighting window; 3, movable baffle; 4, oil cup; 5, driving assembly; 51, driving motor; 52, driving gear; 53, driving rack; 54, the first A guide member; 55, a linkage driving member; 551, a sliding groove; 6, a first linkage assembly; 61, a transmission gear; 62, a transmission rack; 63, a second guide member; 64, a first linkage plate; 65, a baffle bracket; 66, a connecting pin; 67, a guide member; 68, a sliding member; 7, a second linkage assembly; 71, a first follower rack; 72, a second follower rack; 73, a follower gear; 74, a third guide member; 75, an oil cup bracket.

[0040] 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

[0041] 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. That is, in some embodiments of the present invention, these practical details are not necessary. In addition, for the purpose of simplifying the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0042] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0043] In addition, in the present invention, 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 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 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 the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0044] 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:

[0045] The present invention discloses a smoke machine, please refer to Figures 1 to 18 , including a range hood body 1, a telescopic panel assembly 2, a movable baffle 3 and an oil cup 4. The range hood body 1 has a top plate 11 and a telescopic inner cavity a located above the top plate 11, and an air inlet 111 and an oil dripping hole 112 are 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 top plate 11, and is used to open or close the air inlet 111; the oil cup 4 is slidably connected to the top plate 11, and the opening of its accommodating cavity is always aligned with the oil dripping hole 112; wherein, when the range hood is turned on, the telescopic panel assembly 2 moves forward and extends out of the telescopic inner cavity a, the movable baffle 3 moves forward and opens the air inlet 111, and the oil cup 4 moves backward; when the range hood is turned off, the telescopic panel assembly 2 moves backward and retracts into the telescopic inner cavity a, the movable baffle 3 moves backward and closes the air inlet 111, and the oil cup 4 moves forward and causes the downward projection of the rear edge of the movable baffle 3 to fall into the opening of its accommodating cavity.

[0046] In this embodiment, the air inlet 111 is located at the rear end of the top plate 11 relatively close to the wall, and is located obliquely above the gas outlet of the stove in the vertical direction. The range hood body 1 also includes an air collecting box assembly, and the smoke collecting chamber of the air collecting box assembly is connected to the air inlet 111. A smoke exhaust fan is installed in the smoke collecting chamber, and when the smoke exhaust fan is in operation, the air inlet 111 can generate negative pressure, and the oil smoke generated by the user's cooking is sucked into the smoke collecting chamber through the air inlet 111, and finally discharged by the smoke exhaust fan.

[0047] 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 the oil cup 4 moves backward, and then the smoke exhaust fan runs, and the external oil smoke enters the smoke collecting chamber of the range hood through the air suction port 111 and is discharged from the smoke collecting chamber by the smoke exhaust fan. In the process of the oil smoke flowing through the smoke collecting chamber, 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 and the volute of the smoke exhaust fan, and the inner wall surface of the smoke collecting chamber The oil and the oil on the volute will gather at the bottom of the smoke collecting chamber, and drip into the oil cup 4 through the oil drip hole 112 connected to the smoke collecting chamber and be collected by the oil cup 4. After the smoke machine is turned off, the telescopic panel assembly 2 retracts into the telescopic inner cavity a, the movable baffle 3 moves backward and closes the air intake port 111, the oil cup 4 moves forward and makes the downward projection of the rear edge of the movable baffle 3 fall into the opening of its accommodating cavity. 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 then drips downward and is received by the movable baffle 3. The oil gathered on the movable baffle 3 flows into the oil cup 4 and is received by the oil cup 4.

[0048] In the range hood of the present invention, the movable baffle 3 can move relative to the top plate 11, that is, it can move relative to the air inlet 111 on the top plate 11, and the movable baffle 3 can open or close the air inlet 111 by sliding. When the range hood is started, the movable baffle 3 opens the air inlet 111 so that the oil smoke can be normally sucked into the smoke collecting chamber. In the process of the oil smoke flowing into the smoke collecting chamber through the air inlet 111, the oil liquid formed by the mixture of oil and water in the oil smoke will adhere to the air inlet 111. When the range hood is running, the smoke exhaust fan forms a negative pressure in the smoke collecting chamber, and the oil liquid adhered to the air inlet 111 will not drip downward. When the range hood is turned off, the smoke exhaust fan stops running, and the movable baffle 3 closes the air inlet 111. After the gravity of the oil liquid adhered to the air inlet 111 overcomes the adhesion force, it drips from the air inlet 111 and is received by the movable baffle 3, so as to prevent the oil liquid at the air inlet 111 from dripping onto the stove or the user's cooking utensils, affecting the user experience. In addition, by closing the air intake port 111 by moving the baffle plate 3 when the range hood is turned off, foreign objects such as insects can be prevented from entering the range hood and affecting the stability of the internal functional components of the range hood. At the same time, by closing the air intake port 111 by moving the baffle plate 3 when the range hood is turned off, the appearance of the range hood can be improved.

[0049] In the range hood of the present invention, the oil cup 4 can be installed below the range hood body 1, that is, below the oil dripping hole 112. When the range hood is exhausting oil fumes, the oil liquid formed by the mixture of oil and water in the oil fumes will accumulate in the air collecting chamber and on the volute of the smoke exhaust fan, and the oil liquid will eventually flow to the oil cup 4 through the oil dripping hole 112 to realize the collection of the oil liquid.

[0050] In the range hood of the present invention, when the range hood is turned off, the movable baffle 3 moves backward to close the air inlet 111, and the oil cup 4 moves forward so that the downward projection of the rear edge of the movable baffle 3 falls into the opening of its accommodating cavity, so that the oil droplets dripping on the movable baffle 3 can flow along the upper surface of the movable baffle 3 to the rear edge of the movable baffle 3, and finally flow into the oil cup 4 from the rear edge of the movable baffle 3. In order to allow the oil on the movable baffle 3 to flow along the movable baffle 3 into the oil cup 4, the upper surface of the movable baffle 3 can be set as an inclined surface that tilts downward from front to back. When the range hood is turned on, the movable baffle 3 moves forward to open the air inlet 111, and the oil cup 4 moves backward to fully expose the air inlet 111, so as to prevent the oil cup 4 from affecting the air intake of the air inlet 111. It can be understood that no matter whether the range hood is in the on or off state, the opening of the accommodating cavity of the oil cup 4 is always aligned with the oil dripping hole 112 and is located directly below the oil dripping hole 112, which can ensure that the oil accumulated in the range hood body 1 drips from the oil dripping hole 112 to the oil cup 4, completing unified collection and facilitating subsequent cleaning.

[0051] In the range hood of the present invention, the distance that the telescopic panel assembly 2 moves when it extends out of the telescopic inner cavity a is greater than the distance that the moving baffle 3 moves forward when opening the air inlet 111. After the range hood is turned on, the telescopic panel assembly 2 has a functional part located in front of the moving baffle 3. The functional part is located between the front end plate of the telescopic panel assembly 2 and the front edge of the moving baffle 3. The functional part is set according to the auxiliary function of the range hood. For example, when the range hood has a lighting device, the functional part is the part of the telescopic panel assembly 2 provided with the lighting device, so that the distance that the telescopic panel assembly 2 moves when it extends out of the telescopic inner cavity a is greater than the distance that the moving baffle 3 moves forward when opening the air inlet 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 moving baffle 3. The functional part will not be blocked by the moving baffle 3, and the function can meet the requirements of setting functional devices for the range hood.

[0052] In the range hood of the present invention, a lighting assembly and / or an air curtain assembly and / or an air quality detection module are 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 are provided on the top plate 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 are provided on the bottom plate of the functional part of the telescopic panel assembly 2; when the functional part of the telescopic panel assembly 2 extends out of the telescopic inner cavity a, the lighting assembly and / or the air curtain assembly and / or the air quality detection module extend out of the telescopic inner cavity a along with the telescopic panel assembly 2.

[0053] Please refer to Figure 2 and Figure 4 In this embodiment, the installation cavity of the telescopic panel assembly 2 is provided with a lighting assembly, an air curtain assembly and 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 a detection hole 23 corresponding to the air quality detection module, and 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 an illumination window 25 corresponding to the lighting assembly; when the telescopic panel assembly 2 extends out of the telescopic inner cavity a, the lighting assembly, the air curtain assembly and the air quality detection module extend out of the telescopic inner cavity a along with the telescopic panel assembly 2. The functional part of the telescopic panel assembly 2 is the part on the bottom plate of the telescopic panel assembly 2 where the air curtain air outlet hole 24 and the illumination window 25 are provided. When the range hood is started, the lighting assembly, the air curtain assembly and the air quality detection module operate according to the settings or user selections, and the functional part enables the air curtain module and the lighting module to function. When the wind curtain assembly is started, the air above the telescopic panel assembly 2 enters through the wind curtain air inlet hole 22 and is discharged by the wind curtain assembly through the wind curtain air outlet hole 24, forming a wind curtain under the bottom plate of the telescopic panel assembly 2. The wind curtain is located between the user and the stove, which can block the oil smoke and prevent the oil smoke from escaping. When the lighting assembly is running, the light emitted by the lighting assembly shines downward through the lighting window 25 to provide a lighting 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 extraction effect of the range hood on the 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.

[0054] As the above-mentioned specific usage mode, when the front end of the telescopic panel assembly 2 is extended relative to the movable baffle 3, that is, the front end lower surface of the telescopic panel assembly 2 is exposed relative to the movable baffle 3, so as to ensure the full display and use of the above-mentioned functional part.

[0055] Please refer to Figures 1 to 8As the first embodiment of the present invention, when the range hood is started, the telescopic panel assembly 2 and the movable baffle 3 move asynchronously, and the telescopic panel assembly 2 moves before the movable baffle 3. After the functional part on the telescopic panel assembly 2 extends out of the telescopic inner cavity a, the movable baffle 3 starts to move the telescopic panel assembly 2 and opens the air inlet 111. After the air inlet 111 is opened, the functional part of the telescopic panel assembly 2 located in front of the movable baffle 3 will not be blocked by the movable baffle 3, and the functional device can function normally. In this embodiment, the length of the functional part is L1. When the range hood is started, after the functional part extends out of the telescopic inner cavity a, the movable baffle 3 starts to move a distance L2 with the telescopic panel assembly 2 and opens the air inlet 111. When the range hood is turned off, after the movable baffle 3 moves a distance L2 with the telescopic panel assembly 2, the movable baffle 3 closes the air inlet 111 and stops running, and the telescopic panel assembly 2 continues to move a distance L1 and retracts into the telescopic inner cavity a.

[0056] In the above embodiment, when the range hood is started, when the telescopic panel assembly 2 extends out of the telescopic inner cavity a to a length of L1, the part of the telescopic panel assembly 2 provided with the functional part extends out of the telescopic inner cavity a, and then the telescopic panel assembly 2 continues to extend from the telescopic inner cavity a, at which time the movable baffle 3 moves with the telescopic panel assembly 2, and when the movable baffle 3 moves with the telescopic panel assembly 2, the telescopic panel assembly 2 moves synchronously with the movable baffle 3, and the two remain in a relatively static state, and when the telescopic panel assembly 2 extends out of the telescopic inner cavity a to a length of L2, the telescopic panel assembly 2 is completely extended out of the telescopic inner cavity a, and the movable baffle 3 opens the air suction port 111. When the range hood is turned off, the telescopic panel assembly 2 and the movable baffle 3 first move synchronously to a length of L2, and at this time the telescopic panel assembly 2 and the movable baffle 3 remain in a relatively static state, and when the movable baffle 3 closes the air suction port, the movable baffle 3 stops moving, and the telescopic panel assembly 2 continues to move, and is completely retracted into the telescopic inner cavity a after moving a distance of L2.

[0057] Please refer to Fig.13 and Fig.18In this embodiment, the range hood further includes a driving component 5 and a first linkage component 6. The driving component 5 is used to drive the telescopic panel component 2. The first linkage component 6 is used to drive the movable baffle 3. The driving component 5 has a linkage driving member 55. When the range hood is turned on, the driving component 5 drives the telescopic panel component 2 to extend out of the telescopic inner cavity a to a length of L1. The linkage driving member 55 starts the first linkage component 6. The first linkage component 6 drives the movable baffle 3. When the range hood is turned off, the first linkage component 6 drives the movable baffle 3 to move a distance L2 with the telescopic panel component 2 and then disconnects from the linkage driving member 55. The telescopic panel component 2 continues to move a distance L1 and retracts into the telescopic inner cavity a. When the range hood is started, the drive component 5 is started, and the drive component 5 first drives the telescopic panel component 2 to move. After the telescopic panel component 2 extends out of the telescopic inner cavity a to a length of L1, the functional part of the telescopic panel component 2 extends out of the telescopic inner cavity a, and then the linkage drive component 55 starts the first linkage component 6. The first linkage component 6 starts and drives the movable baffle 3 to move synchronously with the telescopic panel component 2, and the two remain in a relatively static state. When the telescopic panel component 2 extends out of the telescopic inner cavity a to a length of L2 again, the drive component 5 stops driving, and the telescopic panel component 2, the linkage drive component 55 and the movable baffle 3 also stop moving. At this time, the telescopic panel assembly 2 is completely extended out of the telescopic inner cavity a, and the movable baffle 3 opens the air intake port 111. When the smoke exhaust fan is running, the range hood can perform normal oil fume extraction work. When the cigarette smoke machine is turned off, the driving component 5 drives the telescopic panel 2 to move backward, and the first linkage component 6 drives the movable baffle 3 to move backward synchronously. After the movable baffle 3 moves a distance L2 with the telescopic panel component 2, the first linkage component 6 is disconnected from the linkage driving member 55. At this time, the movable baffle 3 stops moving and closes the air intake port 111. The driving component 5 continues to drive the telescopic panel component 2 to move backward until the telescopic panel component 2 continues to move a distance L1 and is completely retracted into the telescopic inner cavity a.

[0058] Please refer to Figures 15 to 18As a specific solution of the first embodiment of the present invention, the driving assembly 5 includes a driving motor 51, a driving gear 52, a driving rack 53 and a first guide member 54. The driving motor 51 is arranged above the top plate 11, and its output end is connected to the driving gear 52. The first guide member 54 is slidably connected to the telescopic inner cavity a. The driving rack 53 is connected to the first guide member 54 and meshes with the driving gear 52. The telescopic panel assembly 2 is connected to the driving rack 53. The first linkage assembly 6 includes a transmission gear 61, a transmission rack 62, a second guide member 63 and a first linkage plate 64. The transmission gear 6 1 is coaxially connected to the gear shaft of the driving gear 52, the second guide member 63 is slidably connected to the top plate 11, the first linkage plate 64 is connected to the second guide member 63, the transmission rack 62 is connected to the first linkage plate 64, and the movable baffle 3 is connected to the first linkage plate 64. When the range hood is started, after the first guide member 54 moves by a displacement of L1, the linkage driving member 55 starts to act on the second guide member 63 of the first linkage assembly 6, and drives the second guide member 63 to move forward, and makes the transmission rack 62 mesh with the transmission gear 61, and the first linkage assembly 6 is linked with the driving assembly 5.

[0059] When the range hood is turned on and the drive assembly 5 is started, the drive motor 51 drives the drive gear 52 to rotate, and utilizes the meshing connection relationship to drive the drive rack 53 to move. Since the telescopic panel assembly 2 and the first guide member 54 are both connected to the drive rack 53, when the drive rack 53 is driven and moved by the drive gear 52, the drive rack 53 simultaneously drives the telescopic panel assembly 2 and the first guide member 54 connected thereto to move. The first guide member 54 slides in the telescopic inner cavity a to guide the telescopic panel assembly 2, and the telescopic panel assembly 2 extends out from the telescopic inner cavity a. The linkage drive member 55 is arranged on the first guide member 54 and moves with the first guide member 54. When the length of the telescopic panel assembly 2 extending out of the telescopic inner cavity a is L1, the first guide member 54 moves to a position where the linkage drive member 55 abuts against the end of the second guide member 63. During the subsequent movement of the first guide member 54, the linkage drive member 55 drives the second guide member 63 to slide forward, and the first linkage plate 64 and the transmission rack 62 move forward with the second guide member 63. The transmission rack 62 meshes with the transmission gear 61. Since the transmission gear 61 is connected to the drive gear On the gear shaft of the wheel 52, the transmission gear 61 rotates synchronously with the driving gear 52, the transmission gear 61 starts to drive the transmission rack 62 to move, the transmission rack 62 starts to actively drive the second guide member 63 to move forward, the first linkage plate 64 moves with the second guide member 63 and drives the movable baffle 3 to move, when the output speed of the transmission gear 61 and the driving gear 52 is the same, the movable baffle 3 moves synchronously with the telescopic panel assembly 2 until the movable baffle 3 fully opens the air intake port 111, at this time the moving distance of the movable baffle 3 and the telescopic panel assembly 2 is L2. When the cigarette smoke machine is turned off and the drive assembly 5 is started, the drive motor 51 drives the drive gear 52 to rotate in the opposite direction. At this time, since the transmission gear 61 and the transmission rack 62 are still in a meshing state, the drive motor 51 drives the drive gear 52 to rotate while the transmission gear 61 rotates with the drive gear 52, and the telescopic panel assembly 2 and the movable baffle 3 begin to retreat synchronously. When the movable baffle 3 completely closes the air intake port 111, the moving distance of the movable baffle 3 and the telescopic panel assembly 2 is L2. At this time, the rear end of the transmission rack 62 is meshed with the transmission gear 61. In the subsequent movement process, the transmission rack 62 is disconnected from the transmission gear 61, and the movable baffle 3 no longer moves with the telescopic panel assembly 2. The telescopic panel assembly 2 continues to move backward a distance L1 and then completely retracts into the telescopic inner cavity a, and then the drive assembly 5 stops running.

[0060] Please refer to Fig.13 and Fig.14As a second embodiment of the present invention, the driving assembly 5 includes a driving motor 51, a driving gear 52, a driving rack 53 and a first guide member 54. The driving motor 51 is arranged above the top plate 11, and its output end is connected to the driving gear 52. The first guide member 54 is slidably connected to the telescopic inner cavity a. The driving rack 53 is connected to the first guide member 54 and meshes with the driving gear 52. The telescopic panel assembly 2 is connected to the driving rack 53. The linkage driving member 55 is arranged on the telescopic panel assembly 2 and is provided with a sliding groove 551. The first linkage assembly 6 includes a connecting pin 66, a guide member 67 and a sliding member 6 8. The guide member 67 is arranged above the top plate 11, the sliding member 68 is slidably connected to the guide member 67, the movable baffle 3 is connected to the sliding member 68, and the sliding member 68 is provided with a connecting pin 66. The connecting pin 66 is slidably connected to the sliding groove 551, and the sliding groove 551 has a first end close to the telescopic panel assembly 2 and a second end away from the telescopic panel assembly 2. When the range hood is turned on, the connecting pin 66 is located at the first end of the sliding groove 551. When the connecting pin 66 slides relative to the sliding groove 551 to the second end of the sliding groove 551, the linkage driving member 55 drives the sliding member 68 to move with the telescopic panel assembly 2. When the range hood is turned on, the drive assembly 5 is started, and the drive motor 51 drives the drive gear 52 to rotate, so as to utilize the meshing connection relationship to drive the drive rack 53 to move. Since the telescopic panel assembly 2 and the first guide member 54 are both connected to the drive rack 53, when the drive rack 53 is driven and moved by the drive gear 52, the drive rack 53 simultaneously drives the telescopic panel assembly 2 and the first guide member 54 connected thereto to move. The first guide member 54 slides in the telescopic inner cavity a to guide the telescopic panel assembly 2, and the telescopic panel assembly 2 extends out of the telescopic inner cavity a. The linkage drive member 55 is arranged on the telescopic panel assembly 2. When the telescopic panel assembly 2 moves forward and extends out of the telescopic inner cavity a, the linkage drive member 55 As the telescopic panel assembly 2 moves forward, the sliding slot 551 moves forward, and the second end of the sliding slot 551 approaches the connecting pin 66. When the telescopic panel assembly 2 moves a distance of L1, the second end of the sliding slot 551 abuts against the connecting pin 66. When the telescopic panel assembly 2 drives the linkage driving member 55 to continue to move forward, the linkage driving plate 55 drives the sliding member 68 to move through the connecting pin 66. The sliding member 68 slides along the guide member 67 and drives the movable baffle 3 to move. At this time, the movable baffle 3 moves synchronously with the telescopic panel assembly 2. When the movable baffle 3 fully opens the air inlet 111, the movable baffle 3 moves forward a distance of L2, and then the driving assembly 5 is closed, and the range hood can start to suck the oil fume.When the cigarette lighter is turned off and the drive assembly 5 is started, the drive motor 51 drives the drive gear 52 to rotate in the opposite direction. At this time, since the first end of the sliding groove 551 is not in contact with the connecting pin 66, when the drive motor 51 drives the drive gear 52 to rotate and the drive rack 53 drives the telescopic panel assembly 2 to retreat, the linkage drive member 55 retreats with the telescopic panel assembly 2, and the second end of the sliding groove 551 approaches the connecting pin 66. The movable baffle 3 is in a stationary state. When the telescopic panel assembly 2 moves a distance of L1, the first end of the sliding groove 551 is in contact with the connecting pin 66. When the telescopic panel assembly 2 continues to retreat, the linkage drive member 55 will act on the connecting pin 66 through the first end of its sliding groove 551, and the linkage drive plate 55 will drive the sliding member 68 to move through the connecting pin 66. The sliding member 68 slides along the guide member 67 and drives the movable baffle 3 to move. At this time, the movable baffle 3 moves synchronously with the telescopic panel assembly 2. When the movable baffle 3 completely closes the air intake port 111, the movable baffle 3 moves backwards a distance L2, and the telescopic panel assembly 2 is completely retracted into the telescopic inner cavity a. Then the drive assembly 5 is closed, and the range hood enters the shutdown state.

[0061] In an embodiment of the present invention, the linkage driving member 55 is a long strip plate-like structure with its length direction along the horizontal opening direction of the telescopic inner cavity a (i.e., the direction in which the telescopic panel assembly 2 moves); the length direction of the sliding groove 551 extends along the length direction of the linkage driving member 55, and it can be a strip groove or a rectangular groove.

[0062] The connecting pin 66 can be a cylindrical pin, a bolt, etc., and its outer diameter is equal to the groove width of the sliding groove 551, so as to form a limit for the connecting pin 66 through the inner wall of the groove width direction of the sliding groove 551, so that the connected movable baffle 3 will only move along the horizontal opening direction of the telescopic inner cavity a.

[0063] In this embodiment, the sliding groove 551 is shown as a strip groove, and the connecting pin 66 is shown as a cylindrical pin. The sliding groove 551 has a first end close to the telescopic panel assembly 2, which is specifically reflected in the arc-shaped inner wall of the sliding groove 551 close to the telescopic panel assembly 2; the sliding groove 551 has a second end away from the telescopic panel assembly 2, which is specifically reflected in the other arc-shaped inner wall of the sliding groove 551 away from the telescopic panel assembly 2. And the outer diameter of the cylindrical pin is equal to the diameter of the two arc-shaped inner walls of the sliding groove 551, so as to prevent the connecting pin 66 from getting stuck when it abuts against the two arc-shaped inner walls of the sliding groove 551.

[0064] When the connecting pin 66 slides relatively in the sliding groove 551, the connecting pin 66 slides between the two arc-shaped inner walls of the sliding groove 551 shown as a strip groove. When the telescopic panel assembly 2 moves and the first end or the second end of the sliding groove 551 applies force to the connecting pin 66, the side surface of the connecting pin 66 abuts against one of the arc-shaped inner walls of the sliding groove 551 shown as a strip groove.

[0065] When the connecting pin 66 is located at the first end of the sliding groove 551, if the telescopic panel assembly 2 moves in the direction of extending out of the telescopic inner cavity a, the movable baffle 3 will maintain a relative movement state with the telescopic panel assembly 2 until the second end of the sliding groove 551 moves to the connecting pin 66. At this time, if the telescopic panel assembly 2 continues to move in the direction of extending out of the telescopic inner cavity a, the linkage driving member 55 will drive the sliding member 68 to move through the connecting pin 66. Since the movable baffle 3 is connected to the sliding member 68, the movable baffle 3 moves with the telescopic panel assembly 2 and maintains a relatively static state relative to the telescopic panel assembly 2; when the connecting pin 66 is located at the second end of the sliding groove 551, if the telescopic panel assembly 2 moves in the direction of retracting the telescopic inner cavity a, the movable baffle 3 will maintain a relative movement state with the telescopic panel assembly 2 until the first end of the sliding groove 551 moves to the connecting pin 66. At this time, if the telescopic panel assembly 2 continues to move in the direction of retracting the telescopic inner cavity a, the movable baffle 3 moves with the telescopic panel assembly 2 and maintains a relatively static state relative to the telescopic panel assembly 2.

[0066] The distance between the first end and the second end of the sliding groove 551 is the maximum distance that the telescopic panel assembly 2 moves before the movable baffle 3. The telescopic panel assembly 2 and the movable baffle 3 move relative to each other. When this distance is reached, the connecting pin 66 abuts against the second end from the first end, or abuts against the first end from the second end. If the telescopic panel assembly 2 continues to move, the telescopic panel assembly 2 and the movable baffle 3 move synchronously, and the two remain relatively still.

[0067] When the connecting pin 66 is located at the first end of the sliding groove 551, when the telescopic panel assembly 2 moves in the direction of extending out of the telescopic inner cavity a, the linkage driving member 55 does not apply force to the connecting pin 66. At this time, the connecting pin 66 slides relative to the sliding groove 551, and the second end of the sliding groove 551 approaches the connecting pin 66. After the second end of the sliding groove 551 moves to the connecting pin 66, the telescopic panel assembly 2 continues to move in the direction of extending out of the telescopic inner cavity a. The linkage driving member 55 will apply force to the connecting pin 66. The linkage driving member 55 indirectly drives the movable baffle 3 to move through the connecting pin 66, so that the movable baffle 3 and the telescopic panel assembly 2 remain relatively still.

[0068] When the telescopic panel assembly 2 is fully extended out of the telescopic inner cavity a and the movable baffle 3 opens the air intake port 111, the connecting pin 66 is located at the second end of the sliding groove 551. After shutting down, the telescopic panel assembly 2 begins to move in the direction of retracting the telescopic inner cavity a. At this time, the first end of the sliding groove 551 moves toward the connecting pin 66, and the connecting pin 66 slides relatively in the sliding groove 551. The movable baffle 3 and the telescopic panel assembly 2 move relative to each other. When the first end of the sliding groove 551 moves to the connecting pin 66, the telescopic panel assembly 2 continues to slide into the telescopic inner cavity a, and the linkage drive member 55 will apply force to the connecting pin 66 to drive the movable baffle 3 to move, so that the movable baffle 3 and the telescopic panel assembly 2 remain in a relatively static state.

[0069] According to the third embodiment of the present invention, please refer to Figures 5 to 12 In the third embodiment, the range hood further comprises a driving assembly 5 and a first linkage assembly 6. The driving assembly 5 is used to drive the telescopic panel assembly 2. The first linkage assembly 6 is used to drive the mobile baffle 3. The driving assembly 5 and the first linkage assembly 6 synchronously drive the telescopic panel assembly 2 and the mobile baffle 3 to move. The moving speed of the telescopic panel assembly 2 is greater than the moving speed of the mobile baffle 3. When the range hood is turned on and off, the mobile baffle 3 and the telescopic panel assembly 2 are started synchronously. Since the telescopic panel assembly 2 needs to have a functional part located in front of the mobile baffle 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 mobile 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 mobile baffle 3. When the mobile baffle 3 completely closes the air inlet 111, the telescopic panel assembly 2 can be fully retracted into the telescopic inner cavity a.

[0070] After the range hood is turned on, the driving component 5 drives the telescopic panel component 2 to extend from the telescopic inner cavity a. At this time, the first linkage component 6 synchronously drives the movable baffle 3 to move, and the movable baffle 3 moves with the telescopic panel component 2. When the movable baffle 3 moves with the telescopic panel component 2, since the moving speed of the telescopic panel component 2 is greater than the moving speed of the movable baffle 3, within the same movement duration, the displacement of the telescopic panel component 2 will be greater than the displacement of the movable baffle 3. When the telescopic panel component 2 extends out of the telescopic inner cavity a to a length of L2, the telescopic panel component 2 is completely extended out of the telescopic inner cavity a, and the movable baffle 3 opens the air intake port 111. At this time, the driving component 5 stops driving, and the telescopic panel component 2 and the movable baffle 3 stop moving at the same time, and the range hood can perform normal fume extraction work. Since the displacement of the telescopic panel assembly 2 is greater than the displacement of the movable baffle 3, 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 part of the telescopic panel assembly 2 is located in front of the movable baffle 3, thereby preventing the movable baffle 3 from blocking the lower surface of the functional part of the telescopic panel assembly 2, so as to ensure the effective operation of the functional part of the telescopic panel assembly 2.

[0071] Similarly, when the cigarette smoker is turned off, the driving assembly 5 and the first linkage assembly 6 synchronously drive the telescopic panel assembly 2 and the movable baffle 3 to move. 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 original 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. Therefore, after experiencing the same movement duration, the extra displacement of the telescopic panel assembly 2 than the movable baffle 3 can just make up for the difference between D1 and D2, so that when the telescopic panel assembly 2 is fully retracted into the telescopic inner cavity a, the movable baffle 3 just completely closes the air intake port 111.

[0072] In this embodiment, the driving assembly 5 includes a driving motor 51, a driving gear 52, a driving rack 53 and a first guide member 54. The driving motor 51 is arranged above the top plate 11, and its output end is connected to the driving gear 52. The first guide member 54 is slidably connected to the telescopic inner cavity a, and the driving rack 53 is connected to the first guide member 54 and meshes with the driving gear 52. The telescopic panel assembly 2 is connected to the driving rack 53. The first linkage assembly 6 includes a transmission gear 61, a transmission rack 62, a second guide member 63 and a first linkage plate 64. The transmission gear 61 is coaxially connected to the gear shaft of the driving gear 52. The second guide member 63 is slidably connected to the top plate 11, the first linkage plate 64 is connected to the second guide member 63, the transmission rack 62 is connected to the first linkage plate 64, the movable baffle 3 is connected to the first linkage plate 64, when the transmission rack 62 is engaged with the transmission gear 61, the first linkage plate 64 drives the movable baffle 3 to move, and the wheel diameter R of the driving gear 52 is greater than the wheel diameter r of the transmission gear 61, R:r=L3:L2, wherein L3 is the displacement of the telescopic panel assembly 2 when it extends / retracts the telescopic inner cavity a, and L2 is the displacement of the movable baffle 3 when it opens / closes the air intake port 111.

[0073] When the driving assembly 5 is started, the driving motor 51 drives the driving gear 52 to rotate, so as to drive the driving rack 53 to move by utilizing the meshing connection relationship. Since the telescopic panel assembly 2 and the first guide member 54 are both connected to the driving rack 53, when the driving rack 53 is driven and moved by the driving gear 52, the driving rack 53 simultaneously drives the telescopic panel assembly 2 and the first guide member 54 connected thereto to move. The first guide member 54 slides in the telescopic inner cavity a to guide the telescopic panel assembly 2, and the telescopic panel assembly 2 extends or retracts from the telescopic inner cavity a. At the same time, since the transmission gear 61 is connected to the gear shaft of the driving gear 52, the transmission gear 61 rotates synchronously with the driving gear 52, and the transmission gear 61 simultaneously drives the transmission rack 62 to move, and the transmission rack 62 drives the second guide member 63 to move, and the first linkage plate 64 moves with the second guide member 63 and drives the movable baffle 3 to move. When the output speeds of the transmission gear 61 and the driving gear 52 are different and the output speed of the driving gear 52 is greater than the output speed of the transmission gear 61, the moving speed of the movable baffle 3 is less than the moving speed of the telescopic panel assembly 2.

[0074] In specific applications, the wheel diameter R of the driving gear 52 is greater than the wheel diameter r of the transmission gear 61, and R:r=L3:L2. Therefore, after the same movement time, the displacement L3 of the telescopic panel assembly 2 will be greater than the displacement L2 of the moving baffle 3. When the telescopic panel assembly 2 is fully extended out of the telescopic inner cavity a, the moving baffle 3 fully opens the air inlet 111, and the functional part of the telescopic panel assembly 2 is located at the front end of the moving baffle 3. Similarly, when the cigarette lighter is turned off, when the telescopic panel assembly 2 is fully retracted into the telescopic inner cavity a, the moving baffle 3 just completely closes the air inlet 111.

[0075] Please refer to Fig.13 and Fig.14 , Fig.17 and Fig.18 On the basis of any of the above embodiments, the range hood of the present invention further comprises a second linkage assembly 7, the second linkage assembly 7 comprises a first follower rack 71, a second follower rack 72, a follower gear 73 and a third guide member 74, the movable baffle 3 comprises a first linkage plate 64, the first follower rack 71 is arranged on the first linkage plate 64, the third guide member 74 is slidably connected to the top plate 11, the second follower rack 72 is connected to the third guide member 74, the follower gear 73 is rotatably connected to the top plate 11 and is located between the first follower rack 71 and the second follower rack 72, the follower gear 73 is meshed with the first follower rack 71 and the second follower rack 72 at the same time, and the oil cup 4 is connected to the third guide member 74. When the first linkage plate 64 moves, the first follower rack 71 moves with the first linkage plate 64, the first follower rack 71 will drive the follower gear 73 to rotate, the follower gear 73 will synchronously drive the second follower rack 72 to move, and the second follower rack 72 drives the oil cup 4 to move.

[0076] Since the follower gear 73 is arranged between the first follower rack 71 and the second follower rack 72, when the range hood is turned on, when the first follower rack 71 moves forward with the first linkage plate 64, the first follower rack 71 will drive the follower gear 73 to rotate counterclockwise, and the follower gear 73 will drive the second follower rack 72 to move backward, and the third guide member 74 will move backward with the second follower rack 72 and drive the oil cup 4 to move backward. The moving direction of the oil cup 4 is opposite to the moving direction of the movable baffle 3, so as to prevent the oil cup 4 from blocking the air inlet 111. When shutting down, when the first follower rack 71 moves backward with the first linkage plate 64, the first follower rack 71 will drive the follower gear 73 to rotate clockwise, and the follower gear 73 will drive the second follower rack 72 to move forward. The third guide member 74 moves forward with the second follower rack 72 and drives the oil cup 4 to move forward. The moving direction of the oil cup 4 is opposite to the moving direction of the moving baffle 3, and finally the downward projection of the rear edge of the moving baffle 3 falls into the opening of the accommodating chamber of the oil cup 4, and the oil on the moving baffle 3 can be received by the oil cup 4.

[0077] In actual use, a U-shaped oil baffle portion can be provided on the upper surface of the movable baffle 3, and an avoidance groove adapted to the U-shaped oil baffle portion can be provided on the lower surface of the top plate 11, the opening of the U-shaped oil baffle portion faces backward, and the two side edges of the U-shaped oil baffle portion extend to the rear edge of the movable baffle 3, and the oil falling from the air suction port 111 enters the part surrounded by the U-shaped oil baffle portion, and flows out from the opening of the U-shaped oil baffle portion and drips into the oil cup 4, thereby preventing the oil from dripping from both sides of the movable baffle 3.

[0078] Please refer to Figure 3 , Fig.17 as well as Fig.18 In the range hood of the present invention, the movable baffle 3 is connected to the first linkage assembly 6 through the baffle bracket 65, the oil cup 4 is connected to the second linkage assembly 7 through the oil cup hanger 75, and a first avoidance groove 113 for avoiding the baffle bracket 65 and a second avoidance groove 114 for avoiding the oil cup hanger 75 are provided on the top plate 11. The baffle bracket 65 is slidably connected to the first avoidance groove 113, and the oil cup hanger 75 is slidably connected to the second avoidance groove 114.

[0079] In this embodiment, the baffle bracket 65 is arranged on the lower side of the first linkage plate 64, and its lower side passes through the first avoidance groove 113 and is fixedly connected to the movable baffle 3, and the upper side is fixedly connected to the first linkage plate 64, so that during the movement of the movable baffle 3, the first linkage plate 64 is driven to move synchronously through the baffle bracket 65.

[0080] The upper end of the oil cup bracket 75 is fixedly connected to one end of the third guide member 74 by a bolt (not shown in the figure), and the lower end passes through the second avoidance groove 114 and is fixedly connected to the oil cup 4, so that during the movement of the movable baffle 3, the oil cup 4 is driven by the oil cup bracket 75 to move in the opposite direction synchronously.

[0081] 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 range hood, characterized in that: include: A range hood body (1) comprising a top plate (11) and a telescopic inner cavity (a) located above the top plate (11); the top plate (11) is provided with an air inlet (111) and an oil dripping hole (112); A telescopic panel assembly (2) slidably connected to the telescopic inner cavity (a); A movable baffle (3) slidably connected to the top plate (11) and used for opening or closing the air suction port (111); An oil cup (4) is slidably connected to the top plate (11), and the opening of its accommodating cavity is always aligned with the oil dripping hole (112); When the range hood is turned on, the telescopic panel assembly (2) moves forward and extends out of the telescopic inner cavity (a), the movable baffle (3) moves forward and opens the air inlet (111), and the oil cup (4) moves backward; when the range hood is turned off, the telescopic panel assembly (2) moves backward and retracts into the telescopic inner cavity (a), the movable baffle (3) moves backward and closes the air inlet (111), and the oil cup (4) moves forward and causes the downward projection of the rear edge of the movable baffle (3) to fall into the opening of its accommodating cavity.

2. The range hood according to claim 1, characterized in that: The distance that the telescopic panel assembly (2) moves when extending out of the telescopic inner cavity (a) is greater than the distance that the movable baffle (3) moves forward when opening the air inlet (111); after the range hood is turned on, the telescopic panel assembly (2) has a functional part located in front of the movable baffle (3).

3. The range hood according to claim 2, characterized in that: A lighting component and / or an air curtain component and / or an air quality detection module are arranged 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 are arranged on the top plate of the telescopic panel assembly (2); a wind curtain air outlet hole (24) corresponding to the wind curtain assembly and / or a lighting window (25) corresponding to the lighting component are arranged on the bottom plate of the functional part of the telescopic panel assembly (2); when the functional part of the telescopic panel assembly (2) extends out of the telescopic inner cavity (a), the lighting component and / or the air curtain component and / or the air quality detection module extend out of the telescopic inner cavity (a) along with the telescopic panel assembly (2).

4. The range hood according to claim 2, characterized in that: The length of the functional part is L1. When the range hood is started, after the functional part extends out of the telescopic inner cavity (a), the movable baffle (3) begins to move a distance L2 along with the telescopic panel assembly (2) and opens the air inlet (111). When the range hood is turned off, after the movable baffle (3) moves a distance L2 along with the telescopic panel assembly (2), the movable baffle (3) closes the air inlet (111) and stops running, and the telescopic panel assembly (2) continues to move a distance L1 and retracts into the telescopic inner cavity (a).

5. The range hood according to claim 4, characterized in that: The range hood further comprises a driving component (5) and a first linkage component (6), wherein the driving component (5) is used to drive the telescopic panel component (2), and the first linkage component (6) is used to drive the movable baffle (3). The driving component (5) has a linkage driving member (55). When the range hood is turned on, the driving component (5) drives the telescopic panel component (2) to extend out of the telescopic inner cavity (a) to a length of L1, and then the linkage driving member (55) starts the first linkage component (6), and the first linkage component (6) drives the movable baffle (3). When the range hood is turned off, the first linkage component (6) drives the movable baffle (3) to move a distance L2 with the telescopic panel component (2) and then disconnect from the linkage driving member (55), and the telescopic panel component (2) continues to move a distance L1 and retracts into the telescopic inner cavity (a).

6. The range hood according to claim 5, characterized in that: The driving assembly (5) comprises a driving motor (51), a driving gear (52), a driving rack (53) and a first guide member (54); the driving motor (51) is arranged above the top plate (11); an output end of the driving motor (51) is connected to the driving gear (52); the first guide member (54) is slidably connected to the telescopic inner cavity (a); the driving rack (53) is connected to the first guide member (54) and meshes with the driving gear (52); the telescopic panel assembly (2) is connected to the driving rack (53); the first linkage assembly (6) comprises a transmission gear (61), a transmission rack (62), a second guide member (63) and a first linkage plate (64); the transmission gear (61) is coaxially connected to the driving rack (61) and the second guide member (63) is connected to the first linkage plate (64); On the gear shaft of the gear (52), the second guide member (63) is slidably connected to the top plate (11), the first linkage plate (64) is connected to the second guide member (63), the transmission rack (62) is connected to the first linkage plate (64), and the movable baffle (3) is connected to the first linkage plate (64). When the range hood is started, after the first guide member (54) moves a displacement L1, the linkage drive member (55) begins to act on the second guide member (63) of the first linkage component (6), and drives the second guide member (63) to move forward, and makes the transmission rack (62) mesh with the transmission gear (61), and the first linkage component (6) is linked with the drive component (5).

7. The range hood according to claim 5, characterized in that: The driving assembly (5) comprises a driving motor (51), a driving gear (52), a driving rack (53) and a first guide member (54). The driving motor (51) is arranged above the top plate (11), and its output end is connected to the driving gear (52). The first guide member (54) is slidably connected to the telescopic inner cavity (a). The driving rack (53) is connected to the first guide member (54) and meshes with the driving gear (52). The telescopic panel assembly (2) is connected to the driving rack (53). The linkage driving member (55) is arranged on the telescopic panel assembly (2) and is provided with a sliding groove (551). The first linkage assembly (6) comprises a connecting pin (66), a guide member (67) and a sliding member (68). The guide member (67) is arranged on Above the top plate (11), the sliding member (68) is slidably connected to the guide member (67), the movable baffle (3) is connected to the sliding member (68), the sliding member (68) is provided with the connecting pin (66), the connecting pin (66) is slidably connected to the sliding groove (551), the sliding groove (551) has a first end close to the telescopic panel assembly (2) and a second end away from the telescopic panel assembly (2), when the range hood is turned on, the connecting pin (66) is located at the first end of the sliding groove (551), when the connecting pin (66) slides relative to the sliding groove (551) to the second end of the sliding groove (551), the linkage driving member (55) drives the sliding member (68) to move with the telescopic panel assembly (2).

8. The range hood according to claim 2, characterized in that: The range hood further comprises a driving component (5) and a first linkage component (6), wherein the driving component (5) is used to drive the telescopic panel component (2), and the first linkage component (6) is used to drive the movable baffle (3), and the driving component (5) and the first linkage component (6) synchronously drive the telescopic panel component (2) and the movable baffle (3) to move, and the moving speed of the telescopic panel component (2) is greater than the moving speed of the movable baffle (3).

9. The range hood according to claim 8, characterized in that: The driving assembly (5) comprises a driving motor (51), a driving gear (52), a driving rack (53) and a first guide member (54); the driving motor (51) is arranged above the top plate (11), and its output end is connected to the driving gear (52); the first guide member (54) is slidably connected to the telescopic inner cavity (a); the driving rack (53) is connected to the first guide member (54) and meshes with the driving gear (52); the telescopic panel assembly (2) is connected to the driving rack (53); the first linkage assembly (6) comprises a transmission gear (61), a transmission rack (62), a second guide member (63) and a first linkage plate (64); the transmission gear (61) is coaxially connected to the gear shaft of the driving gear (52); the second The guide member (63) is slidably connected to the top plate (11), the first linkage plate (64) is connected to the second guide member (63), the transmission rack (62) is connected to the first linkage plate (64), the movable baffle (3) is connected to the first linkage plate (64), when the transmission rack (62) is meshed with the transmission gear (61), the first linkage plate (64) drives the movable baffle (3) to move, the wheel diameter R of the driving gear (52) is greater than the wheel diameter r of the transmission gear (61), R:r = L3:L2, wherein L3 is the displacement of the telescopic panel assembly (2) when it extends / retracts the telescopic inner cavity (a), and L2 is the displacement of the movable baffle (3) when it opens / closes the air inlet (111).

10. The range hood according to claim 1, characterized in that: The range hood comprises a second linkage assembly (7), wherein the second linkage assembly (7) comprises a first follower rack (71), a second follower rack (72), a follower gear (73) and a third guide member (74); the movable baffle (3) comprises a first linkage plate (64); the first follower rack (71) is arranged on the first linkage plate (64); the third guide member (74) is slidably connected to the top plate (11); the second follower rack (72) is connected to the third guide member (74); the follower gear (73) is rotationally connected to the top plate (11) and is located between the first follower rack (71) and the second follower rack (72); the follower gear (73) is meshed with the first follower rack (71) and the second follower rack (72) at the same time; and the oil cup (4) is connected to the third guide member (74).

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