Integrated cooker and control method thereof

Abstract

The application discloses an integrated cooker and a control method thereof. The application comprises an air suction port, a containing cavity, a dust particle detection device and a baffle. The baffle has a first state of unfolding to form a baffle surface and a second state of being stored in the containing cavity. When the dust particle detection device detects that the oil fume concentration reaches more than the concentration threshold, the driving device controls the baffle to unfold to the first state, and the air suction port is matched to shield the oil fume to prevent the oil fume from escaping. When the oil fume concentration does not reach more than the concentration threshold, the baffle is stored in the second state, the occupied space is reduced, and the aesthetic appearance is improved.

Description

Technical Field

[0001] This invention relates to the field of integrated stove technology, specifically to an integrated stove and its control method. Background Technology

[0002] An integrated cooktop is a kitchen appliance that combines multiple functions such as a range hood, gas stove, disinfection cabinet, and storage cabinet. It is also known in the industry as an eco-friendly cooktop or integrated eco-friendly cooktop. It boasts advantages such as space saving, excellent fume extraction, energy efficiency, and environmental friendliness. Typical integrated cooktops achieve a 95% fume extraction rate; the higher the extraction rate, the better the quality. Some brands even achieve an extreme 99.95% extraction rate. Most existing integrated cooktops utilize baffles to block fumes, along with smoke inlets to prevent their escape. However, the baffles on the top of most existing integrated cooktops are fixed with screws, making them inconvenient to disassemble or store when not in use, taking up space and affecting aesthetics. Summary of the Invention

[0003] The purpose of this section is to outline some aspects of the embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0004] In view of the problems existing in the above and / or the existing integrated stove and its control method, the present invention is proposed.

[0005] Therefore, the purpose of this invention is to provide an integrated stove and its control method, including an air intake, a accommodating cavity, a dust particle detection device, and a baffle. The baffle has a first state of being unfolded to form a baffle surface and a second state of being retracted into the accommodating cavity. When the dust particle detection device detects that the oil fume concentration reaches a concentration threshold, the driving device controls the baffle to unfold to the first state, which works with the air intake to block the oil fume and prevent it from escaping. When the oil fume concentration does not reach a concentration threshold, the baffle is retracted to the second state, reducing the space occupied and improving the aesthetics.

[0006] To address the aforementioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0007] An integrated cooktop includes a cooktop for cooking and an air duct with an exhaust fan installed under the cooktop. The exhaust duct includes an air intake connected to the air duct section, a negative pressure area is formed outside the air intake, and a baffle is retractably provided within the negative pressure area. The cooktop also includes an air quality detection device electrically connected to a main controller. A driving device is used to drive the baffle to form a windproof surface. The baffle has a first state in which it forms a windproof surface, and the first state has a maximum area value.

[0008] As a preferred embodiment of the integrated stove described in this invention, in the first state, i.e. there is a shield, the size of which is matched with the rotation speed. When the area increases, especially when it reaches the maximum value, the airflow speed at the boundary of the shield surface will increase, thereby preventing overflow on the one hand, and creating negative pressure to draw the surrounding air into the air intake on the other hand.

[0009] In a preferred embodiment of the integrated stove described in this invention, the baffle has a second state in which it is received into the accommodating cavity of the stove platform. In the second state, the exhaust fan has a first rotational speed. In the first state, the exhaust fan has a second rotational speed, and the second rotational speed is greater than the first rotational speed.

[0010] In a preferred embodiment of the integrated stove described in this invention, the air intake is a long and narrow air intake, horizontally arranged, with its length covering the center of the stove head, and the length being 1.2-1.8 times the center-to-center distance. The baffle has a second state in which it is received into the accommodating cavity of the stove. In the second state, the air intake velocity of the air intake is 3-9 meters per second. In the first state, the air intake velocity of the air intake is 8-16 meters per second. The air velocity in the first state is greater than the air velocity in the second state.

[0011] In a preferred embodiment of the integrated stove described in this invention, the baffle includes multiple stacked baffle pieces and an opening / closing door located at the opening of the accommodating cavity. The baffle pieces are multiple and interconnected, with the outermost baffle piece being the largest and connected to the inner wall of the accommodating cavity, and the innermost baffle piece being the smallest and connected to the opening / closing door. Each baffle piece has a guide limiting groove on its outer wall, and each baffle piece has a guide limiting block installed symmetrically to the guide limiting groove on its inner wall. The guide limiting blocks on the inner walls of the outer baffle pieces extend into the guide limiting grooves on the outer walls of the inner baffle pieces.

[0012] In a preferred embodiment of the integrated stove described in this invention, the driving device includes a fixed plate mounted on the inner wall of the accommodating cavity, a motor mounted on the bottom of the fixed plate, a main gear located on the top of the fixed plate and connected to the output end of the motor, a through hole opened on the top of the fixed plate, a bearing mounted on the top of the fixed plate, a driven gear mounted on the top of the bearing, a threaded hole opened on the top of the driven gear, and a threaded rod rotatably passing through the threaded hole. The bearing, the threaded hole, and the through hole are located on the same axis. The driven gear meshes with the main gear. The threaded rod passes through the through hole and rotatably passes through the threaded hole. The top end of the threaded rod is connected to the bottom of the innermost baffle plate.

[0013] In a preferred embodiment of the integrated stove described in this invention, the air quality detection device is a dust particle detection device. When the dust particle concentration is detected to be outside the range, the drive device is controlled to drive the baffle to form the first state of the baffle surface.

[0014] In a preferred embodiment of the integrated stove described in this invention, the dust particle detection device is installed on the front side of the top plate of the integrated stove; a downward-component air curtain is formed, creating an angle. The angle range corresponding to the first state is 85-120 degrees; the angle range corresponding to the second state is 60-90 degrees. The PM detection point of the dust particle detection device is located outside the integrated stove where the downward-component air curtain is located. When it detects pollutants, it increases the wind speed of the air curtain, extending it downward by 90 degrees and inward by 85 degrees.

[0015] A baffle control method, comprising:

[0016] It has a vertically adjustable baffle that can be extended and fully opened. When the dust particle detection device's sensor probe detects a certain amount of PM2.5 concentration, the power supply sends a signal to the drive device to open the baffle to the corresponding position.

[0017] As a preferred embodiment of the baffle control method of the present invention, it includes:

[0018] Step 1: The dust particle detection device receives particulate matter concentration information; compares the particulate matter concentration represented by the particulate matter concentration information with a preset particulate matter concentration; if the particulate matter concentration represented by the particulate matter concentration information is greater than the preset particulate matter concentration, it is determined that the oil fume concentration has reached the concentration threshold; if the particulate matter concentration represented by the particulate matter concentration information is not greater than the preset particulate matter concentration, it is determined that the oil fume concentration has not reached the concentration threshold.

[0019] Step 2: When the oil fume concentration does not reach the concentration threshold, determine the current state of the baffle; if the current position of the baffle is the first state, control the driving device to adjust the baffle to the second state.

[0020] The drive device starts the motor to drive the main gear to rotate, the main gear meshes with the driven gear to rotate, and pushes the threaded rod downward through the screw structure. When the threaded rod moves downward, it pulls the innermost baffle plate, causing the opening and closing door to move downward and move the baffle to the second state. At this time, the motor stops driving the main gear to stop rotating, and the baffle is kept in the second state.

[0021] Step 3: The dust particle detection device receives PM2.5 information and particulate matter concentration information; compares the particulate matter concentration represented by the particulate matter concentration information with a preset particulate matter concentration; if the particulate matter concentration represented by the particulate matter concentration information is greater than the preset particulate matter concentration, it determines that the oil fume concentration has reached the concentration threshold.

[0022] Step 4: When the oil fume concentration reaches a level greater than the concentration threshold, determine the current state of the baffle; if the current position of the baffle is the second state, control the driving device to adjust the baffle to move to the first state;

[0023] The driving device starts the motor to drive the main gear to rotate in the opposite direction. The main gear meshes with the driven gear and drives it to rotate in the opposite direction. The screw structure pushes the threaded rod upward, which in turn pushes the innermost baffle to move the opening and closing door upward. The innermost baffle causes the guide limiting block to slide inside the guide limiting groove. When the guide limiting block slides to abut against the top of the guide limiting groove, the inner baffle pulls the outer baffle upward until multiple baffles move upward and unfold, so that the baffle moves to the first state. At this time, the motor stops driving the main gear to stop rotating, so that the baffle remains in the first state.

[0024] Compared with the prior art, the present invention includes an air intake, a receiving cavity, a dust particle detection device, and a baffle. The baffle has a first state of being unfolded to form a baffle surface and a second state of being stored inside the receiving cavity. When the dust particle detection device detects that the oil fume concentration reaches a concentration threshold, the driving device controls the baffle to unfold to the first state, which works with the air intake to block the oil fume and prevent it from escaping. When the oil fume concentration does not reach a concentration threshold, the baffle is stored to the second state, which reduces the space occupied and improves the aesthetics. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0026] Figure 1 This is an overall structural diagram of an integrated stove and its control method according to the present invention;

[0027] Figure 2 This is a partial structural diagram of an integrated stove and its control method according to the present invention;

[0028] Figure 3This is a cross-sectional structural diagram of an integrated stove and its control method according to the present invention;

[0029] Figure 4 This is a structural diagram of the drive device for an integrated stove and its control method according to the present invention;

[0030] Figure 5 This is a diagram of the baffle structure of an integrated stove and its control method according to the present invention;

[0031] Figure 6 This is an overall structural diagram of a second embodiment of an integrated stove and its control method according to the present invention;

[0032] Figure 7 This is a cross-sectional view of a second embodiment of an integrated stove and its control method according to the present invention;

[0033] Figure 8 This is an overall structural diagram of a third embodiment of an integrated stove and its control method according to the present invention;

[0034] Figure 9 This is a cross-sectional structural diagram of a third embodiment of an integrated stove and its control method according to the present invention. Detailed Implementation

[0035] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0036] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0037] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0038] This invention provides an integrated stove and its control method, including an air intake, a accommodating cavity, a dust particle detection device, and a baffle. The baffle has a first state of being unfolded to form a baffle surface and a second state of being retracted into the accommodating cavity. When the dust particle detection device detects that the oil fume concentration reaches a concentration threshold, the driving device controls the baffle to unfold to the first state, which works with the air intake to block the oil fume and prevent it from escaping. When the oil fume concentration does not reach a concentration threshold, the baffle retracts to the second state, reducing space occupation and improving aesthetics.

[0039] Figure 1-5 The diagram shown is a structural schematic of a first embodiment of an integrated stove and its control method according to the present invention. Please refer to [link / reference]. Figures 1-5 An integrated stove and its control method according to this embodiment include an air intake 100, a accommodating cavity 200, a baffle 300, a driving device 400, and a top plate 500.

[0040] The integrated cooktop includes a cooktop for cooking and an air duct with an exhaust fan installed under the cooktop. The air intake 100 is a horizontal and narrow air intake 100, which is set on the vertical plate of the integrated cooktop. The air intake 100 is close to the cooktop, and the height of the air intake 100 from the cooktop is 10-48% of the height of the vertical plate. Another way to set the air intake 100 is to place it close to the top of the vertical plate, and the height of the air intake 100 from the top plate 500 is 10-48% of the height of the vertical plate. A negative pressure area is formed outside the air intake 100, which is used to work with the baffle 300 to continue to draw in the oil fumes and prevent the oil fumes from escaping. The receiving cavity 200 is opened at both ends of the cooktop near the edge, and is used to store the baffle 300.

[0041] The baffle 300 includes multiple stacked baffle plates 310 and an opening / closing door 320 located at the opening of the accommodating cavity 200. The baffle plates 310 are multiple and interlocked. The outermost baffle plate 310 is the largest and connects to the inner wall of the accommodating cavity 200, while the innermost baffle plate 310 is the smallest and connects to the opening / closing door 320. Each baffle plate 310 has a guide limiting groove 330 on its outer wall. A guide limiting block 340 is installed symmetrically on the inner wall of each baffle plate 310 and the guide limiting groove 330. The guide limiting block 340 on the inner wall of the outer baffle plate 310 extends into the guide limiting groove 330 on the outer wall of the inner baffle plate 310. The baffle 300 has a first state forming a windproof surface, which has a very large area. In this first state, there is obstruction. The area size is related to the rotational speed. As the area increases, especially the largest area... When the value is reached, the airflow velocity at the boundary of the shielding surface increases, thereby preventing overflow and creating negative pressure to draw surrounding air into the air intake 100. This results in a second state where the exhaust fan has a first rotational speed in the second state and a second rotational speed in the first state, with the second speed being greater than the first. An intermediate state is also included, where the area is smaller than the maximum area, such as 35%, 50%, or 75% of the maximum area. This satisfies the need for airflow organization. Furthermore, during this process, a gap is formed between the baffle and the inner wall of the stove. Air flowing out from this gap, along with air flowing from the non-maximum area (taking 50% of the maximum area as an example), allows the airflow from the baffle edge to be closer to the contaminants, facilitating the removal of less heavily polluted areas with lower energy efficiency and less pollution. Another technical advantage is that using the non-maximum area significantly reduces the contaminated area of ​​the baffle, thereby reducing dirt and grime and minimizing user maintenance.

[0042] The drive unit 400 includes a fixed plate 410 mounted on the inner wall of the accommodating cavity 200, a motor 420 mounted on the bottom of the fixed plate 410, a main gear 430 located on the top of the fixed plate 410 and connected to the output end of the motor 420, a through hole 440 opened on the top of the fixed plate 410, a bearing 450 mounted on the top of the fixed plate 410, a driven gear 460 mounted on the top of the bearing 450, a threaded hole 470 opened on the top of the driven gear 460, and a threaded rod 480 that rotates through the threaded hole 470. The bearing 450, the threaded hole 470, and the through hole 440 are located on the same axis. The driven gear 460 meshes with the main gear 430. The threaded rod 480 passes through the through hole 440 and rotates through the threaded hole 470. The top end of the threaded rod 480 is connected to the bottom of the innermost baffle plate 310. A lug is vertically provided on the side end of the fixed plate 410. A screw hole is opened on the side wall of the lug for easy fixing of the fixed plate 410 to the accommodating cavity 200 by screws passing through the screw hole. Inside the 00, the main gear 430 is rotated by the starter motor 420. The main gear 430 drives the driven gear 460 to rotate using its teeth. Because the top of the threaded rod 480 is fixedly connected to the bottom of the innermost baffle plate 310, the rotation angle of the threaded rod 480 is fixed. When the driven gear 460 rotates, the threaded hole 470 and the threaded rod 480 rotate and engage. The screw structure can push the innermost baffle plate 310 to move up and down. When the innermost baffle plate 310 moves upward, the guide limiting block 340 of the inner baffle plate 310 slides inside the guide limiting groove 330 on the inner wall of the outer baffle plate 310. When the guide limiting block 340 moves upward and abuts against the top of the guide limiting groove 330, the inner baffle plate 310 drives the outer baffle plate 310 to move upward. This process drives multiple baffle plates 310 to move upward until the baffle 300 unfolds to form the first state, which, together with the air intake 100, prevents the oil fumes from escaping.

[0043] Combination Figures 1-5 This embodiment of an integrated stove and its control method receives particulate matter concentration information through a dust particle detection device 510; compares the particulate matter concentration represented by the particulate matter concentration information with a preset particulate matter concentration; if the particulate matter concentration represented by the particulate matter concentration information is greater than the preset particulate matter concentration, it is determined that the oil fume concentration has reached a concentration threshold; if the particulate matter concentration represented by the particulate matter concentration information is not greater than the preset particulate matter concentration, it is determined that the oil fume concentration has not reached the concentration threshold. When the oil fume concentration has not reached the concentration threshold, the drive device 400 is adjusted to drive the baffle 300 to be stored inside the accommodating cavity 200 to form a second state, reducing the area occupied on the top of the stove and improving aesthetics. When the oil fume concentration reaches a concentration threshold, the drive device 400 pushes the baffle 300 to unfold to form a first state. The baffle 300 forms a baffle surface, which, together with the air curtain, blocks and guides the oil fume. The air intake 100 adsorbs the oil fume and discharges it from the exhaust fan duct.

[0044] Figure 6-7 The diagram shown is a structural schematic of a second embodiment of an integrated stove and its control method according to the present invention. Please refer to [link / reference]. Figures 6-7 Unlike the above embodiments, this embodiment of an integrated stove includes a stove for cooking, an air duct with an exhaust fan installed under the stove, and a vertical plate installed on the top of the stove. The accommodating cavity 200 is opened on the side wall of the vertical plate near the two ends. The baffle 300 is formed by multiple baffle pieces 310 stacked horizontally. The baffle 300 is horizontally unfolded to form a first state, and the driving device 400 and the baffle 300 are housed inside the accommodating cavity 200 to form a second state.

[0045] Figure 8-9 The diagram shown is a structural schematic of a third embodiment of an integrated stove and its control method according to the present invention. Please refer to [link / reference]. Figures 8-9 Unlike the above embodiments, this embodiment of an integrated stove includes a stovetop for cooking, an air duct with an exhaust fan installed under the stovetop, and a vertical plate installed on the top of the stovetop. The accommodating cavity 200 is opened on the side wall of the vertical plate near the two ends. The baffle 300 is a multi-panel fan-shaped structure. When rotated to the first state with the driving device 400 as the center, the multi-panel fan-shaped structure unfolds in a sealed manner to form a baffle surface. The baffle surface is vertical in the same direction as the vertical plate and the fan-shaped angle is 30-120 degrees. When the baffle 300 is folded and stored inside the accommodating cavity 200, it forms the second state.

[0046] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, as long as there is no structural conflict, the features in the disclosed embodiments can be combined with each other in any manner. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An integrated kitchen comprising a cooking hob and an air duct in which an exhaust fan is arranged below the hob, characterized in that: The application relates to a smoke exhaust fan, which comprises a smoke suction port (100) connected with the smoke duct section, a baffle (300) arranged in the negative pressure area formed outside the smoke suction port (100) and capable of stretching and contracting, an air quality detection device electrically connected with a main controller, a driving device (400) for driving the baffle (300) to form a wind shielding surface, the baffle (300) has a first state of forming the wind shielding surface, the first state has a maximum area value, in the first state, the area size is matched with the rotating speed, when the area increases, the airflow speed at the boundary of the shielding surface increases, the baffle has a second state of being accommodated into a containing cavity (200) of the cooking bench, in the second state, the smoke exhaust fan has a first rotating speed, in the first state, the smoke exhaust fan has a second rotating speed, the second rotating speed is greater than the first rotating speed, the baffle (300) comprises a plurality of stacked baffle pieces (310) and an opening and closing door (320) located at the opening of the containing cavity (200), the baffle pieces (310) are mutually sleeved, the outermost baffle piece (310) has the maximum size and is connected with the inner wall of the containing cavity (200), the innermost baffle piece (310) has the minimum size and is connected with the opening and closing door (320), the outer wall of each baffle piece (310) is provided with a guide limiting groove (330), the inner wall of each baffle piece (310) is provided with a guide limiting block (340) at a position symmetrical to the guide limiting groove (330), the guide limiting block (340) of the inner wall of the baffle piece (310) located at the outer circle extends into the guide limiting groove (330) of the outer wall of the baffle piece (310) located at the inner circle, the containing cavity (200) is arranged at the position close to the edge of the cooking bench at both ends, and is used for accommodating the baffle (300).

2. The integrated cooker of claim 1, wherein, The smoke suction port (100) is a long and narrow smoke suction port (100) arranged horizontally, the length of the smoke suction port (100) covers the center of the cooking bench, the length is 1.2-1.8 times the center distance, the baffle has a second state of being accommodated into the containing cavity (200) of the cooking bench, in the second state, the smoke suction speed of the smoke suction port (100) is 3-9 meters per second, in the first state, the smoke suction speed of the smoke suction port (100) is 8-16 meters per second, the wind speed in the first state is greater than that in the second state.

3. The integrated cooker of claim 2, wherein, The driving device (400) comprises a fixed plate (410) mounted on the inner wall of the accommodating cavity (200), a motor (420) mounted on the bottom of the fixed plate (410), a main gear (430) located on the top of the fixed plate (410) and connected with the output end of the motor (420), a through hole (440) opened on the top of the fixed plate (410), a bearing (450) mounted on the top of the fixed plate (410), a slave gear (460) mounted on the top of the bearing (450), a threaded hole (470) opened on the top of the slave gear (460) and a threaded rod (480) rotatingly penetrating the threaded hole (470), the bearing (450), the threaded hole (470) and the through hole (440) are located on the same axis, the slave gear (460) is meshingly connected with the main gear (430), the threaded rod (480) penetrates the through hole (440) and rotatingly penetrates the threaded hole (470), and the top end of the threaded rod (480) is connected with the bottom of the innermost baffle piece (310).

4. The integrated cooker of any one of claims 1-3, wherein, The air quality detection device is a dust particle detection device (510), and when the dust particle concentration exceeds the range, the control driving device drives the baffle to form the first state of the baffle surface.

5. The integrated cooktop of claim 4, wherein, The dust particle detection device (510) is arranged on the front side of the top plate (500) of the integrated cooker; a wind curtain with a downward component is formed, an included angle is formed, the angle range corresponding to the first state is 85-120 degrees; the angle range corresponding to the second state is 60-90 degrees, and the PM detection point of the dust particle detection device (510) is located outside the integrated cooker in the downward formed wind curtain; when the dust particle detection device (510) detects pollutants, the wind speed of the wind curtain is increased, and the wind curtain is downward by 90 degrees and inward by 85 degrees. 6.A control method of an integrated kitchen, characterized by, The control method is applied to the integrated cooker in any one of claims 1-5, the integrated cooker has a vertically liftable baffle (300), the baffle (300) can be completely opened in an extended state, when the dust particle detection device (510) senses a certain amount of PM2.5 concentration, the power supply transmits a signal to the driving device (400) to open the baffle (300) to the corresponding position. 7.A control method of an integrated kitchen, characterized by, The control method is applied to the integrated cooker in claim 3, and the air quality detection device is a dust particle detection device (510), which comprises: Step 1, the dust particle detection device (510) receives particle concentration information; compares the particle concentration represented by the particle concentration information with a preset particle concentration; if the particle concentration represented by the particle concentration information is greater than the preset particle concentration, it is determined that the oil smoke concentration reaches the concentration threshold; if the particle concentration represented by the particle concentration information is not greater than the preset particle concentration, it is determined that the oil smoke concentration does not reach the concentration threshold. Step 2, when the oil fume concentration does not reach the concentration threshold, determine the current state of the baffle (300); if the current position of the baffle (300) is the first state, control the driving device (400) to adjust the baffle (300) to move to the second state; The driving device (400) drives the main gear (430) to rotate by starting the motor (420), the main gear (430) engages to drive the slave gear (460) to rotate, and the threaded rod (480) is pushed downward by the screw structure, when the threaded rod (480) moves downward, the innermost baffle piece (310) is pulled to drive the opening and closing door (320) to move downward, so that the baffle (300) moves to the second state, at this time the motor (420) stops driving the main gear (430) to stop rotating, so that the baffle (300) remains in the second state; Step 3, the dust particle detection device (510) receives PM2.5 information and particulate matter concentration information; compare the particulate matter concentration represented by the particulate matter concentration information with the preset particulate matter concentration; if the particulate matter concentration represented by the particulate matter concentration information is greater than the preset particulate matter concentration, it is determined that the oil fume concentration reaches the concentration threshold; Step 4, when the oil fume concentration reaches greater than the concentration threshold, determine the current state of the baffle (300); if the current position of the baffle (300) is the second state, control the driving device (400) to adjust the baffle (300) to move to the first state; The driving device (400) drives the main gear (430) to rotate reversely by starting the motor (420), the main gear (430) engages to drive the slave gear (460) to rotate reversely, and the threaded rod (480) is pushed upward by the screw structure, the innermost baffle piece (310) is pushed to drive the opening and closing door (320) to move upward, the innermost baffle piece (310) drives the guide limiting block (340) to slide in the guide limiting groove (330), when the guide limiting block (340) slides to abut with the top of the guide limiting groove (330), the inner baffle piece (310) pulls the outer baffle piece (310) to move upward, until the plurality of baffle pieces (310) move upward and expand, so that the baffle (300) moves to the first state, at this time the motor (420) stops driving the main gear (430) to stop rotating, so that the baffle (300) remains in the first state.

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