Smoke suction plate, side suction type range hood and control method of side suction type range hood

Abstract

The invention discloses a smoke suction plate, a side suction type range hood and a control method of the side suction type range hood. The smoke suction plate is of a hollow cavity structure, a flow guide structure is arranged in the hollow cavity structure and comprises a flow guide piece and an adjusting piece, an auxiliary air inlet is formed in a bottom plate of the hollow cavity structure, and the opening and closing angles of the flow guide piece and the auxiliary air inlet are adjusted by controlling the adjusting piece. Oil fume flows into the flow guide structure through the auxiliary air inlet under the action of the main fan, so that the oil fume suction plate can be unfolded under the light oil fume working conditions of steaming, boiling and the like, the oil fume suction port effectively extends to the position close to an oil fume generation source, efficient interception and absorption are carried out at the initial stage of oil fume diffusion, and finally the purpose of improving the oil fume suction efficiency is achieved on the premise of not changing the mounting mode. The suction rate is obviously improved; and the purpose of intelligent control is achieved.

Description

Technical Field

[0001] This invention relates to the field of intelligent range hood technology, and in particular to a smoke extraction plate, a side-suction range hood, and a control method thereof. Background Technology

[0002] A side-draft range hood is a machine that uses side-intake air and oil fume separation technology to effectively separate oil and achieve a clean oil fume extraction effect. The air inlet of a side-draft range hood is closer to the source of oil fumes, which can lock in the generated oil fumes immediately and effectively shorten the distance that oil fumes travel to rise, resulting in a more ideal smoke extraction effect.

[0003] Currently, the position and angle of the suction inlet of traditional side-draft range hoods are fixed. The suction inlet is typically located on the side of the cooktop, far from the pot. When steaming or boiling, which involve light cooking methods with minimal oil fumes, the amount of fumes produced is small and their diffusion speed is slow. The distance of the suction inlet makes it difficult to effectively capture the fumes before they spread, causing them to diffuse in all directions. Furthermore, the fixed angle of the suction inlet in traditional side-draft range hoods cannot be dynamically adjusted according to the cooking method and the path of the fumes. When steaming or boiling, which involve light cooking methods with minimal oil fumes, the fumes spread over a large area and in various directions. The fixed angle of the suction inlet cannot cover all diffusion paths, causing some fumes to escape. Therefore, there is still room for improvement in the suction efficiency. Summary of the Invention

[0004] This invention provides a smoke extraction plate, a side-suction range hood, and a control method thereof to solve the problems of traditional side-suction range hoods where the smoke is far from the cookware and spreads in all directions, and where the fixed angle of the smoke extraction port makes it difficult to cover all diffusion paths.

[0005] According to one aspect of the present invention, a smoke extraction plate is provided. The smoke extraction plate adopts a hollow cavity structure. A flow guiding structure is provided inside the hollow cavity structure. The flow guiding structure includes a flow guiding plate and an adjusting component. An auxiliary air inlet is provided on the bottom plate of the hollow cavity structure. By controlling the adjusting component, the opening and closing angle of the flow guiding plate and the auxiliary air inlet is adjusted so that the oil fume gas flows into the flow guiding structure through the auxiliary air inlet under the action of the main fan.

[0006] The technical solution of this invention provides an automatically retractable smoke extraction plate located below the main air inlet of a side-suction range hood. The smoke extraction angle of the smoke extraction plate is adjustable, which allows for automatic adjustment of the opening and closing angle of the guide vanes and auxiliary air inlet in the smoke extraction plate according to the concentration of cooking fumes, thus meeting the needs of different cooking scenarios.

[0007] Optionally, one end of the adjusting component is fixed to the top plate of the hollow cavity structure, the other end is fixed to the top of the guide vane, and the bottom of the guide vane is fixed to the bottom plate of the hollow cavity structure.

[0008] Optionally, the bottom of the guide vane is fixed to the bottom plate of the hollow cavity structure via a pivot hinge.

[0009] The technical solution of this invention uses a pivot hinge to control the opening and closing angle of the guide vane and the auxiliary air inlet, so as to ensure that the component is stable and smooth when rotating by bearing bending moment and torque.

[0010] Optionally, the adjusting element includes an elastic element and a heating element covered by the elastic element; The heating element is heated to increase its temperature, and the elastic element contracts when heated, increasing the opening angle between the guide vane and the auxiliary air inlet. The heating element stops heating, and the elastic element returns to its normal state.

[0011] The technical solution of this invention controls the state of the adjusting component and changes the opening and closing angle of the guide vane and the auxiliary air inlet to adapt to the smoke extraction needs required in different cooking scenarios.

[0012] Optionally, the auxiliary air inlet has multiple rows of holes arranged in an array, with the spacing between the holes in each row ranging from 22mm to 25mm and the spacing between holes in adjacent rows ranging from 24mm to 26mm.

[0013] The technical solution of this invention, through the arrangement of the aforementioned holes, can effectively balance the smoking effect and the noise level.

[0014] Optionally, the auxiliary air inlet is located on the bottom plate of the hollow cavity structure facing the cooktop with an angle ranging from 15 degrees to 30 degrees.

[0015] The technical solution of this invention uses an inclined air inlet, which can effectively prevent oil droplets from falling directly and guide them into the oil cup below along the inclined slope.

[0016] Optionally, the smoke extraction plate may also include a gas sensor, which is located at the air outlet of the airflow guide structure.

[0017] The technical solution of this invention collects the oil fume concentration in real time to further adjust the opening angle of the guide vane and the auxiliary air inlet, so that the oil fume gas flows into the guide structure through the auxiliary air inlet under the action of the main fan.

[0018] According to another aspect of the present invention, a side-suction range hood is provided, which includes the smoke extraction plate of any embodiment of the present invention.

[0019] According to another aspect of the present invention, a control method for a side-draft range hood is provided, applicable to a side-draft range hood in any embodiment of the present invention. The control method for the side-draft range hood includes: After the side-suction range hood is turned on, obtain the current oil fume concentration; Based on the current state of the oil fume concentration control and adjustment components, the opening and closing angles of the guide vanes and the auxiliary air inlet are adjusted so that the oil fume gas flows into the guide structure through the auxiliary air inlet under the action of the main fan.

[0020] The technical solution of this invention, after the side-suction range hood is turned on, controls the smoke extraction plate to be in working state and obtains the current oil fume concentration entering the smoke extraction plate, so that the automatically retractable auxiliary smoke extraction plate can be effectively extended to a position close to the source of oil fume generation in the early stage of oil fume diffusion, and efficiently intercepted and absorbed; furthermore, according to the current oil fume concentration, the state of the control adjustment component is adjusted to adjust the opening angle of the guide vane and the auxiliary air inlet, so that the oil fume gas flows into the guide structure through the auxiliary air inlet under the action of the main fan, so as to achieve dynamic optimization of the smoke extraction range and significantly improve the smoke extraction rate without changing the installation method of the side-suction range hood.

[0021] Optionally, the opening and closing angles of the guide vanes and auxiliary air inlet can be adjusted according to the current state of the oil fume concentration control and regulating component, including: The current operating mode of the side-suction range hood is determined based on the current oil fume concentration, and the state of the adjustment components is controlled according to the current operating mode to adjust the opening and closing angle of the guide vane and the auxiliary air inlet.

[0022] The technical solution of this invention determines the current operating mode based on the current oil fume concentration, and adjusts the opening and closing angles to correspond to different current operating modes to adapt to the oil fume absorption requirements of the corresponding current operating mode, ensuring that the oil fumes do not escape.

[0023] Optionally, the current operating mode of the side-suction range hood can be determined based on the current oil fume concentration, including: If the current oil fume concentration is less than or equal to the first oil fume concentration threshold, then the current operating mode of the side-suction range hood is determined to be the light oil fume operating mode. If the current oil fume concentration is greater than the first oil fume concentration threshold and less than the second oil fume concentration threshold, then the current operating mode of the side-suction range hood is determined to be the medium oil fume operating mode. If the current oil fume concentration is greater than or equal to the second oil fume concentration threshold, then the current operating mode of the side-suction range hood is determined to be the heavy oil fume operating mode.

[0024] The technical solution of this invention determines different current operating modes based on the current oil fume concentration, determines the appropriate opening and closing angles of the guide vanes and auxiliary air inlets, meets the oil fume absorption requirements of the corresponding current operating mode, and ensures that the oil fume does not escape.

[0025] Optionally, the current operating mode is either light oil fume operating mode, medium oil fume operating mode, or heavy oil fume operating mode. The control adjuster is positioned according to the current operating condition to adjust the opening angle of the guide vanes and auxiliary air inlet, including: If the current operating mode is the light oil fume operating mode, the control adjustment component is in the normal state; If the current operating mode is medium oil fume operating mode, the control adjustment component is in a retracted state, increasing the opening and closing angle between the guide vane and the auxiliary air inlet; If the current operating mode is the heavy oil fume operating mode, the control adjustment component will be in a retracted state, increasing the opening angle between the guide vane and the auxiliary air inlet, and controlling the main air inlet of the side-suction range hood to be in an open state.

[0026] Optionally, the feature is that, after adjusting the opening and closing angle of the guide vane and the auxiliary air inlet, it further includes: If the current operating mode is light oil fume operating mode, then control the main fan to run at the first speed; If the current operating mode is medium oil fume operating mode, then control the main fan to run at the second speed; If the current operating mode is heavy oil fume operating mode, then control the main fan to run at the third speed; The first rotational speed is less than the second rotational speed, and the second rotational speed is less than the third rotational speed.

[0027] The technical solution of this invention matches different main fan speeds under different operating conditions, significantly improving the suction efficiency.

[0028] Optionally, after adjusting the opening angle of the guide vane and the auxiliary air inlet, the following features are also included: Obtain the real-time concentration of oil fumes entering the smoke extraction plate; Based on the real-time oil fume concentration, the side-suction range hood will switch from the current operating mode to the target operating mode, which can be a light oil fume mode, a medium oil fume mode, or a heavy oil fume mode.

[0029] The technical solution of this invention continuously monitors the oil fume concentration and dynamically switches the operating mode according to the changes in oil fume concentration. The entire process continues to cycle until the side-suction range hood is manually or automatically turned off, realizing intelligent operation of the side-suction range hood and improving the oil fume extraction efficiency.

[0030] Optionally, the control methods for side-draft range hoods also include: When switching a side-suction range hood from heavy smoke mode to light smoke mode or medium smoke mode, if the real-time smoke concentration is detected to be lower than the third smoke concentration threshold within the first duration, the side-suction range hood will be controlled to switch to light smoke mode or medium smoke mode. When switching the side-suction range hood from medium oil fume mode to light oil fume mode, if the real-time oil fume concentration is detected to be lower than the fourth oil fume concentration threshold during the second duration, the side-suction range hood will be controlled to switch to light oil fume mode. Among them, the third oil fume concentration threshold is lower than the second oil fume concentration threshold, and the fourth oil fume concentration threshold is lower than the first oil fume concentration threshold.

[0031] Optionally, the control methods for side-draft range hoods also include: Upon receiving the shutdown command from the side-suction range hood, the main fan is controlled to run for an extended period of time before shutting down, and the smoke extraction plate is adjusted from the working state back to the retracted state.

[0032] The technical solution of this invention, through post-processing of the shutdown command, ensures that the side-suction range hood can further absorb oil fumes, improving the efficiency and stability of the next startup.

[0033] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying 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.

[0035] Figure 1 This is a structural schematic diagram of a side-suction range hood according to an embodiment of the present invention; Figure 2 This is a structural schematic diagram of a side-suction range hood according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the flow guiding structure in the smoking plate according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the flow guiding structure in the smoking plate according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the adjusting member provided in an embodiment of the present invention; Figure 6 This is a top view of the smoking board provided according to an embodiment of the present invention; Figure 7 This is a side view structural diagram of a side-suction range hood according to an embodiment of the present invention; Figure 8This is a flowchart illustrating a control method for a side-suction range hood according to an embodiment of the present invention; Figure 9 This is a flowchart illustrating a control method for a side-suction range hood according to an embodiment of the present invention; Figure 10 This is a flowchart illustrating a control method for a side-suction range hood according to an embodiment of the present invention; In the picture: 100 - Smoke extraction plate, 200 - Main air inlet of side-suction range hood, 300 - Oil cup; 110-Flow guiding structure, 111-Flow guiding vane, 112-Adjusting component, 113-Rotating shaft, 120-Auxiliary air inlet, 130-Gas sensor; 1121 - Elastic element, 1122 - Heating element. Detailed Implementation

[0036] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0037] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0038] Figure 1 and Figure 2 This invention provides a schematic diagram of a side-suction range hood, applicable to situations where a side-suction range hood with an adjustable smoke extraction angle dynamically optimizes the smoke extraction range during light-smoke cooking methods such as steaming and boiling. Figure 1 and Figure 2As shown, the adjustable smoke angle side-suction range hood includes an automatically retractable smoke plate 100, that is, the smoke plate 100 is extended when it is in working state and retracted when it is not in working state. It can be seen that the structure of the smoke plate 100 is simple and can dynamically optimize the smoke range of the side-suction range hood without changing the installation method of the whole machine.

[0039] In this embodiment, Figure 1 With the central smoke extraction plate 100 in the working state (i.e., in the unfolded state), and the main air inlet 200 of the side-suction range hood in the open state, it can be seen that the main air inlet 200 can also extract cooking fumes at this time, working in conjunction with the smoke extraction plate 100. Figure 2 When the central smoke extraction plate 100 is in working condition, that is, when the smoke extraction plate 100 is in the unfolded state, the main air inlet 200 of the side-suction range hood is in the closed state. It can be seen that at this time, the main air inlet 200 does not extract oil fumes, and the smoke extraction plate 100 can extract oil fumes independently.

[0040] See also Figure 1 and Figure 2 The smoke extraction plate 100 shown is located below the main air inlet 200. The smoke extraction plate 100 is a long strip-shaped three-dimensional structure. The smoke extraction plate 100 can be made of aluminum alloy profile or stainless steel stamping to ensure lightweight and high strength.

[0041] Furthermore, the smoke extraction plate 100 adopts a hollow cavity structure, which can serve as an auxiliary air duct, such as... Figures 1 to 4 As shown, a flow guiding structure 110 is provided inside the hollow cavity structure. The flow guiding structure 110 includes a flow guiding plate 111 and an adjusting component 112. An auxiliary air inlet 120 is provided on the bottom plate of the hollow cavity structure. By controlling the adjusting component 112, the opening and closing angle of the flow guiding plate 111 and the auxiliary air inlet 120 is adjusted so that the oil fume gas flows into the flow guiding structure through the auxiliary air inlet 120 under the action of the main fan.

[0042] It is known that the airflow entering the airflow structure 110 can be guided by the guide vane 111 in the airflow structure 110, which forms a synergistic effect with the airflow of the main air inlet 200, improving the overall negative pressure efficiency and oil fume capture capability, and reducing the vortex at the air inlet of the smoke plate 100, thus reducing noise.

[0043] like Figure 3 and Figure 4 The flow guiding structure 110 shown has an adjusting member 112, one end of which is fixed to the top plate of the hollow cavity structure, and the other end of which is fixed to the top of the flow guiding plate 111. The bottom of the flow guiding plate 111 is fixed to the bottom plate of the hollow cavity structure. Further details can be found in the following sections. Figure 3In the shown airflow guiding structure 110, the adjusting element 112 is in its normal state, and the opening and closing angle between the airflow guide vane 111 and the auxiliary air inlet 120 is small, which can achieve a faster smoke collection effect and accelerate smoke extraction; see continue to see Figure 4 In the flow guiding structure 110 shown, the regulating element 112 is in a contracted state when heated, and the opening and closing angle between the flow guiding plate 111 and the auxiliary air inlet 120 is large, which is conducive to absorbing a wide range of dispersed oil fumes.

[0044] It is understandable that multiple adjusting members 112 can be arranged side by side, as long as they can pull the guide vane 111. This embodiment does not impose any special restrictions on the specific number of adjusting members 112.

[0045] Based on the above, please continue to refer to Figure 3 and Figure 4 As shown, the bottom of the guide vane 111 is fixed to the bottom plate of the hollow cavity structure by a pivot hinge. Optionally, the guide vane 111 is fixed by a hinge of the pivot shaft 113 to achieve a small range of rotation.

[0046] Based on the above embodiments, see below. Figure 5 As shown, the adjusting member 112 includes an elastic element 1121 and a heating element 1122 covered by the elastic element 1121; when the heating element 1122 is heated, the elastic element 1121 is in a contracted state due to the heat, which increases the opening angle between the guide vane 111 and the auxiliary air inlet 120; when the heating element 1122 is stopped, the elastic element 1121 is stretched back to its normal state, thereby reducing the opening angle between the guide vane 111 and the auxiliary air inlet 120.

[0047] Specifically, when heating element 1122 is stopped (i.e., when heating element 1122 is not heating), elastic element 1121 is in its normal state, meaning it is in its natural, free state without external force. At this time, the opening angle between the guide vane 111 and the auxiliary air inlet 120 is relatively small. If heating element 1122 heats up, elastic element 1121 contracts due to heat, and the opening angle between the guide vane 111 and the auxiliary air inlet 120 is larger, which is beneficial for absorbing widely dispersed fumes. Furthermore, if heating element 1122 cools down naturally, elastic element 1121 is stretched by guide vane 111 to its normal state, and the opening angle between guide vane 111 and the auxiliary air inlet 120 is controlled to be smaller, increasing the negative pressure and more quickly removing fumes.

[0048] For example, the airflow guiding structure in the smoke extraction plate is an adaptive structure. For instance, the airflow guiding plate 111 can be an airflow guiding fin, the elastic element 1121 can be a shape memory alloy spring, and the heating element 1122 is a heating film covered by the shape memory alloy spring. One end of the shape memory alloy spring is fixed to the smoke extraction plate, and the other end is fixed above the airflow guiding fin. The airflow guiding fin can be rotated by the stretching and contracting action, thereby controlling the opening and closing angle between the airflow guiding fin and the auxiliary air inlet 120.

[0049] Based on the above embodiments, see below. Figure 6 As shown, the auxiliary air inlet 120 has multiple rows of holes arranged in an array. The spacing between the holes in each row is 22mm to 25mm, and the spacing between the holes in adjacent rows is 24mm to 26mm.

[0050] As can be seen, the auxiliary air inlet 120 is opened on the bottom plate of the inclined hollow cavity structure of the smoke plate 100 facing the stove. It is designed as three rows of multiple arrayed holes with a diameter D1 of 18mm±1mm. The spacing L3 between each row of parallel holes is about 22mm to 25mm, and the spacing L4 between adjacent rows of holes is about 24mm to 26mm. This hole size can better balance the smoke extraction effect and the noise level.

[0051] Based on the above embodiments, see below. Figure 7 As shown, the auxiliary air inlet 120 is located on the bottom plate of the hollow cavity structure facing the stove with an inclined angle ranging from 15 degrees to 30 degrees.

[0052] As is known, please continue to refer to Figure 1 , Figure 2 and Figure 7 As shown, the width of the smoke extraction plate 100 is smaller than the width of the main unit of the side-draft range hood. The thickness L1 of the smoke extraction plate 100 is between 30mm and 60mm, and the length L2 is between 70mm and 100mm to ensure sufficient extension distance and negative pressure area. Furthermore, the tilt angle of the smoke extraction plate 100 relative to the angle of the horizontal cooktop is within a certain range. Between 15 and 30 degrees, the oil droplets are prevented from falling directly while being guided along the inclined slope into the lower oil cup 300.

[0053] Based on the above embodiments, see below. Figure 1 , Figure 2 and Figure 7 As shown, the smoke extraction plate 100 also includes a gas sensor 130, which is located at the air outlet of the airflow guiding structure 110.

[0054] Specifically, the gas sensor 130 is installed inside the smoke extraction plate 100. The gas sensor 130 is used to detect the concentration of oil fumes inside the smoke extraction plate 100 in real time. Then, based on different oil fume concentrations, the control adjustment component is adjusted to adjust the opening angle of the guide vane and the auxiliary air inlet so that the oil fume gas flows into the guide structure through the auxiliary air inlet under the action of the main fan.

[0055] Based on the above embodiments, see below. Figure 1 and Figure 2 As shown, this embodiment also provides a side-suction range hood, which includes the smoke extraction plate of any embodiment of the present invention.

[0056] The side-suction range hood of this invention includes an automatically retractable smoke extraction plate. The smoke extraction plate adopts a hollow cavity structure, and a flow guiding structure is set inside the hollow cavity structure. The flow guiding structure includes a flow guiding plate and an adjusting component. An auxiliary air inlet is opened on the bottom plate of the hollow cavity structure. By controlling the adjusting component, the opening angle of the flow guiding plate and the auxiliary air inlet is adjusted so that the oil fume gas flows into the flow guiding structure through the auxiliary air inlet under the action of the main fan. In the case of light oil fume conditions such as steaming and cooking, the smoke extraction plate can be deployed to effectively extend the smoke extraction port to a position close to the source of oil fume generation, thereby efficiently intercepting and absorbing oil fume in the early stage of oil fume diffusion. Ultimately, it achieves the purpose of significantly improving the absorption rate and realizing intelligent control without changing the installation method.

[0057] Based on the same inventive concept Figure 8 This is a flowchart illustrating a control method for a side-suction range hood provided in an embodiment of the present invention, applicable to any side-suction range hood of the present invention. For example... Figure 8 As shown, the control method of this side-suction range hood includes: S110. After the side-suction range hood is turned on, obtain the current oil fume concentration.

[0058] As those skilled in the art will know, when a side-suction range hood is not in operation, its main air inlet is located at... Figure 2 In the closed state shown, the smoke extraction plate is retracted and fits snugly against the main body of the side-draft range hood, maintaining a clean and simple appearance without altering the overall installation method. Therefore, after the side-draft range hood is turned on, the smoke extraction plate can be controlled to extend to... Figure 1 and Figure 2 The working status shown is for subsequent smoking control.

[0059] In this embodiment, in order to achieve efficient interception and absorption of oil fumes in the early stage of oil fume diffusion, after the side-suction range hood is turned on, the smoke extraction plate is controlled to be in working state under light oil fume conditions such as steaming and boiling, so as to effectively extend the smoke extraction port to a position close to the source of oil fume generation, thereby improving the absorption rate.

[0060] The current oil fume concentration is the oil fume concentration detected in real time by the gas-sensitive sensor installed at the air outlet of the air guide structure. The current oil fume concentration is the oil fume concentration obtained in real time after the side-suction range hood is turned on and the smoke extraction plate is in working state.

[0061] S120. Based on the current state of the oil fume concentration control and adjustment component, adjust the opening and closing angle of the guide vane and the auxiliary air inlet so that the oil fume gas flows into the guide structure through the auxiliary air inlet under the action of the main fan.

[0062] Based on the above, the current operating mode of the side-suction range hood is determined according to the current oil fume concentration. The current operating mode can be divided into light oil fume mode, medium oil fume mode, or heavy oil fume mode. The light oil fume mode can be considered as the working mode with less oil fume, such as the working mode corresponding to steaming, boiling, or soup making. The medium oil fume mode can be considered as the working mode corresponding to a moderate level of oil fume, such as the working mode corresponding to quick stir-frying or light frying. The heavy oil fume mode can be considered as the working mode with more oil fume, such as the working mode corresponding to stir-frying or deep-frying.

[0063] It is known that if the current oil fume concentration is less than or equal to the first oil fume concentration threshold, the current oil fume concentration inside the smoke extraction plate is low, and the cooktop under the side-draft range hood may be performing steaming, boiling, or soup-making operations at this time. Therefore, the current operating mode of the side-draft range hood is determined to be the light oil fume operating mode. If the current oil fume concentration is greater than the first oil fume concentration threshold and less than the second oil fume concentration threshold, the current oil fume concentration inside the smoke extraction plate is moderate, and the cooktop under the side-draft range hood may be performing stir-frying, light frying, or other operations at this time. Therefore, the current operating mode of the side-draft range hood is determined to be the medium oil fume operating mode. If the current oil fume concentration is greater than or equal to the second oil fume concentration threshold, the current oil fume concentration inside the smoke extraction plate is high, and the cooktop under the side-draft range hood may be performing stir-frying, deep-frying, or other operations at this time. Therefore, the current operating mode of the side-draft range hood is determined to be the heavy oil fume operating mode.

[0064] The first oil fume concentration threshold is the oil fume concentration threshold used to determine whether the side-suction range hood has entered the light oil fume working mode. The first oil fume concentration threshold can be selected and set according to the determination requirements of the light oil fume working mode. The second oil fume concentration threshold is the oil fume concentration threshold used to distinguish whether the side-suction range hood has entered the medium oil fume working mode or the heavy oil fume working mode. The second oil fume concentration threshold can be selected and set according to the determination requirements of the medium oil fume working mode or the heavy oil fume working mode. In this embodiment, there are no special restrictions on the specific values ​​of the first oil fume concentration threshold and the second oil fume concentration threshold.

[0065] In one embodiment, if the current operating mode is a light oil fume operating mode and the control adjustment component is in a normal state, it is known that the opening and closing angle of the guide vane and the auxiliary air inlet is between 30 degrees and 45 degrees. This opening and closing angle can significantly increase the air flow rate and negative pressure in this area, achieving precise and strong suction. At the same time, the main fan is controlled to run at the first speed.

[0066] Understandably, in the current operating mode, which is the light oil fume mode, the smoke extraction plate is only in the extended state, and the adjustment components are in a natural, original free state without any external force, which can meet the current oil fume extraction needs without any other operation.

[0067] Furthermore, when the side-suction range hood is in the light smoke mode, the real-time smoke concentration entering the smoke extraction plate is obtained. Based on the real-time smoke concentration, the side-suction range hood is switched from the light smoke mode to the target mode. If the target mode is the light smoke mode, that is, the real-time smoke concentration is still less than or equal to the first smoke concentration threshold, the side-suction range hood remains in the light smoke mode. If the target mode is the medium smoke mode, that is, the real-time smoke concentration is greater than the first smoke concentration threshold and less than the second smoke concentration threshold, then the mode can be switched from the light smoke mode to the medium smoke mode. If the target mode is the heavy smoke mode, that is, the real-time smoke concentration is greater than the second smoke concentration threshold, then the mode can be switched from the light smoke mode to the heavy smoke mode.

[0068] In another embodiment, if the current operating mode is the medium oil fume operating mode, the control adjustment component is in a retracted state, increasing the opening angle between the guide vane and the auxiliary air inlet. It can be known that the angle range of the increased opening angle between the guide vane and the auxiliary air inlet is between 60 degrees and 75 degrees. This opening angle can expand the smoke extraction range and effectively capture a small amount of water vapor and oil fumes that are dispersed but rise slowly. At the same time, the main fan is controlled to run at the second speed.

[0069] Furthermore, when the side-suction range hood is in the medium fume mode, the real-time fume concentration entering the suction plate is obtained. Based on the real-time fume concentration, the side-suction range hood is switched from the medium fume mode to the target mode. If the target mode is the light fume mode, i.e., the real-time fume concentration is less than or equal to the first fume concentration threshold, then the mode can be switched from medium fume mode to light fume mode. If the target mode is the medium fume mode, i.e., the real-time fume concentration is greater than the first fume concentration threshold and less than the second fume concentration threshold, the side-suction range hood remains in the medium fume mode. If the target mode is the heavy fume mode, i.e., the real-time fume concentration is greater than the second fume concentration threshold, then the mode can be switched from medium fume mode to heavy fume mode.

[0070] In another embodiment, if the current operating mode is the heavy oil fume operating mode, the control adjustment component is in a retracted state, increasing the opening angle between the guide vane and the auxiliary air inlet. It can be known that the angle range of the increased opening angle between the guide vane and the auxiliary air inlet is between 60 degrees and 75 degrees. This opening angle can expand the smoke extraction range and effectively capture a small amount of water vapor and oil fumes that are dispersed but rise slowly. That is, this opening angle can be the same as the opening angle corresponding to the medium oil fume operating mode. In other words, the opening angle can remain unchanged in both modes. However, in the heavy oil fume operating mode, the main air inlet of the side-suction range hood is controlled to be in an open state so that the main air inlet and the auxiliary air inlet can simultaneously extract oil fumes. At the same time, the main fan is controlled to run at the third speed.

[0071] Furthermore, when the side-suction range hood is in heavy smoke mode, the real-time smoke concentration entering the smoke extraction plate is obtained. Based on the real-time smoke concentration, the side-suction range hood is switched from heavy smoke mode to target mode. If the target mode is light smoke mode, i.e., the real-time smoke concentration is less than or equal to the first smoke concentration threshold, then the mode can be switched from heavy smoke mode to light smoke mode. If the target mode is medium smoke mode, i.e., the real-time smoke concentration is greater than the first smoke concentration threshold and less than the second smoke concentration threshold, then the mode can be switched from heavy smoke mode to medium smoke mode. If the target mode is heavy smoke mode, i.e., the real-time smoke concentration is greater than the second smoke concentration threshold, the side-suction range hood remains in heavy smoke mode.

[0072] The first speed can be a low to medium speed, meaning the main fan operates at the first speed, which is sufficient to handle the amount of oil fumes in the light oil fume mode while maintaining low noise. The second speed can be a medium to high speed, meaning the main fan operates at the second speed, which is sufficient to handle the amount of oil fumes in the medium oil fume mode. The third speed can be the highest speed, meaning the main fan operates at the third speed, which is sufficient to handle the amount of oil fumes in the heavy oil fume mode. The first speed is lower than the second speed, and the second speed is lower than the third speed. The first, second, and third speeds can be selected and set according to different oil fume requirements. This embodiment does not impose special restrictions on the specific values ​​of the first, second, and third speeds.

[0073] Additionally, it should be noted that when switching a side-draft range hood from heavy smoke mode to light smoke mode or medium smoke mode, if the real-time smoke concentration is detected to be lower than the third smoke concentration threshold within the first duration, the range hood will be controlled to switch to light smoke mode or medium smoke mode. When switching a side-draft range hood from medium smoke mode to light smoke mode, if the real-time smoke concentration is detected to be lower than the fourth smoke concentration threshold within the second duration, the range hood will be controlled to switch to light smoke mode. The third smoke concentration threshold is lower than the second smoke concentration threshold, and the fourth smoke concentration threshold is lower than the first smoke concentration threshold.

[0074] Based on the above embodiments, when the side-suction range hood is in any operating mode, if a shutdown command is received for the side-suction range hood, the main fan is controlled to extend its operation for a set time to continue removing residual smoke and odors. The set time can be selected and set according to the required amount of residual smoke and odors. This embodiment does not limit the specific value of the set time; optionally, the set time can be from 1 minute to 3 minutes.

[0075] It should be noted that during the extended operation period of the main fan, the main air inlet of the side-suction range hood is closed, and the smoke extraction plate remains in the deployed state, or the angle of the guide vanes is intelligently selected based on the last measured concentration to achieve the highest efficiency for post-exhaust. Furthermore, after the extended operation period of the main fan ends, the smoke extraction plate automatically adjusts from the working state back to the retracted state, and the side-suction range hood enters standby mode.

[0076] The technical solution of this invention, after the side-suction range hood is turned on, obtains the current oil fume concentration, so that in the early stage of oil fume diffusion, the automatically retractable auxiliary smoke extraction plate can be effectively extended to a position close to the source of oil fume generation for efficient interception and absorption; furthermore, according to the current state of the oil fume concentration control adjustment component, the opening and closing angle of the guide vane and the auxiliary air inlet is adjusted so that the oil fume gas flows into the guide structure through the auxiliary air inlet under the action of the main fan, so that the side-suction range hood can be dynamically optimized without changing its installation method, and the smoke extraction rate can be significantly improved.

[0077] Based on the same inventive concept Figure 9 This is a flowchart illustrating a control method for a side-draft range hood provided by an embodiment of the present invention. Based on the previous embodiments, this embodiment determines the current operating mode of the side-draft range hood according to the current oil fume concentration. Based on the current operating mode, it adjusts the opening angle of the guide vanes and auxiliary air inlet accordingly, and controls the main fan to adjust to the corresponding wind speed, dynamically optimizing the smoke extraction range and improving the oil fume capture capability, until the side-draft range hood is manually or automatically shut down, providing an optional implementation method. Figure 9 As shown, the control method of this side-suction range hood includes: S210. After the side-suction range hood is turned on, obtain the current oil fume concentration.

[0078] S220. If the current oil fume concentration is less than or equal to the first oil fume concentration threshold, then the current operating mode of the side-suction range hood is determined to be the light oil fume operating mode.

[0079] S221. If the current operating mode is light oil fume operating mode, the control adjustment component is in normal state, and the main fan is controlled to run at the first speed so that the oil fume gas flows into the guide structure through the auxiliary air inlet under the action of the main fan.

[0080] For example, the airflow guiding structure in the smoke extraction plate is an adaptive structure. The airflow guide can be a guide fin, the elastic element can be a shape memory alloy spring, and the heating element is a heating film covered by the shape memory alloy spring. In the current operating mode, which is a light oil fume mode, the smoke extraction plate remains in the extended state. Power to the heating film is cut off, and the shape memory alloy spring is stretched under the weight of the guide fin, causing the guide fin to rotate. This reduces the opening angle between the guide fin and the auxiliary air inlet, restoring it to the normal opening angle corresponding to the guide fin and auxiliary air inlet. This opening angle significantly increases the airflow velocity and negative pressure in the area, achieving precise and strong suction. Simultaneously, taking a low to medium speed as an example, the main fan operates at a low to medium speed, sufficient to handle the amount of oil fume at this time, while maintaining low noise. This achieves efficient interception of oil fume in the initial stage of diffusion through a close-range, wide-angle, and quiet approach.

[0081] S230. If the current oil fume concentration is greater than the first oil fume concentration threshold and less than the second oil fume concentration threshold, then the current operating mode of the side-suction range hood is determined to be the medium oil fume operating mode.

[0082] S231. If the current operating mode is medium oil fume operating mode, the control adjustment component is in a retracted state, increasing the opening angle between the guide vane and the auxiliary air inlet, and controlling the main fan to run at the second speed, so that the oil fume gas flows into the guide structure through the auxiliary air inlet under the action of the main fan.

[0083] Based on the above, the current operating mode is the medium-fume operating mode. The smoke extraction plate remains in the deployed state, and the heating film of the adaptive airflow guiding structure is energized and heated, causing the shape memory alloy spring to contract due to heat. That is, the control adjustment component is in a contracted state. Furthermore, the airflow guiding fins are pulled to a larger opening angle with the auxiliary air inlet, that is, the opening angle between the airflow guiding fins and the auxiliary air inlet is increased. This opening angle can expand the smoke extraction range and effectively capture the small amount of dispersed but slowly rising water vapor and oil fumes. At the same time, the main fan speed is switched from the first speed to the second speed, and the main fan speed is increased to a medium-high speed. Thus, during the period of rising oil fume intensity, effective control is achieved through a combination of wide-angle capture and increased air volume, and preparation is made for the possible arrival of heavy oil fume.

[0084] S240. If the current oil fume concentration is greater than or equal to the second oil fume concentration threshold, then the current operating mode of the side-suction range hood is determined to be the heavy oil fume operating mode.

[0085] S241. If the current operating mode is heavy oil fume operating mode, the control adjustment component is in a retracted state, increasing the opening angle between the guide vane and the auxiliary air inlet, and controlling the main air inlet of the side-suction range hood to be in an open state, and controlling the main fan to run at the third speed, so that the oil fume gas flows into the guide structure through the auxiliary air inlet under the action of the main fan.

[0086] Based on the above, the current operating mode is the heavy oil fume mode. The guide fins are usually kept at a large angle, consistent with the opening and closing angle of the medium oil fume mode. That is, the control adjustment component is in a retracted state, increasing the opening and closing angle between the guide fins and the auxiliary air inlet. This is because although the oil fume has increased, it has not yet reached the level that requires extreme negative pressure. Maintaining a large angle can maintain a large coverage area while increasing the air volume, preventing side escape. In the heavy oil fume mode, the main fan speed is increased first. The main fan automatically switches to the highest speed or intelligent boost mode. At the same time, the main air inlet of the side-suction range hood is kept open, working in conjunction with the smoke extraction plate to create a strong negative pressure field. This powerfully captures the large amount of oil fume generated instantly, thus dealing with the oil fume explosion period and ensuring that the oil fume does not escape with strong negative pressure and high wind speed.

[0087] Additionally, it should be noted that after adjusting the opening angle of the guide vane and the auxiliary air inlet, considering that the oil fume concentration is not constant and the operating mode can be adjusted in real time according to the oil fume concentration, the oil fume concentration is continuously monitored, and the operating mode is dynamically switched according to the oil fume concentration. That is, the real-time oil fume concentration entering the smoke extraction plate is obtained, and further, the side-suction range hood is switched from the current operating mode to the target operating mode according to the real-time oil fume concentration. The target operating mode is a light oil fume operating mode, a medium oil fume operating mode, or a heavy oil fume operating mode.

[0088] In this embodiment, when switching the side-draft range hood from a heavy smoke mode to a light smoke mode or a medium smoke mode, if the real-time smoke concentration is detected to be lower than a third smoke concentration threshold within a first duration, the side-draft range hood is controlled to switch to a light smoke mode or a medium smoke mode. When switching the side-draft range hood from a medium smoke mode to a light smoke mode, if the real-time smoke concentration is detected to be lower than a fourth smoke concentration threshold within a second duration, the side-draft range hood is controlled to switch to a light smoke mode. The third smoke concentration threshold is less than the second smoke concentration threshold, and the fourth smoke concentration threshold is less than the first smoke concentration threshold.

[0089] S250: Upon receiving the shutdown command of the side-suction range hood, the main fan is controlled to run for an extended set time before shutting down, and the smoke extraction plate is adjusted from the working state back to the retracted state.

[0090] The technical solution of this invention embodiment allows the side-suction range hood to achieve closed-loop, real-time feedback automatic adjustment, continuously detect the oil fume concentration, and dynamically switch between three levels according to the changes in oil fume concentration. The entire process continues to cycle until the range hood is manually or automatically turned off. At the same time, it can realize the linkage between the high-power mode and the deployment of the auxiliary smoke extraction plate to ensure the processing capacity under high load.

[0091] Based on the same inventive concept Figure 10 This is a flowchart illustrating a control method for a side-suction range hood according to an embodiment of the present invention. Based on the previous embodiments, this embodiment adjusts the opening angle of the guide vanes and auxiliary air inlet according to the current fume concentration, and controls the main fan to adjust to the corresponding wind speed, dynamically optimizing the fume extraction range and improving the fume capture capability. Furthermore, it continuously monitors the fume concentration and dynamically switches the operating mode according to changes in fume concentration until the side-suction range hood is manually or automatically shut down, providing an optional implementation method. Figure 10 As shown, the control method of this side-suction range hood includes: S310. After the side-suction range hood is turned on, obtain the current oil fume concentration.

[0092] S320. If the current oil fume concentration is less than or equal to the first oil fume concentration threshold, then the current operating mode of the side-suction range hood is determined to be the light oil fume operating mode.

[0093] S321. If the current operating mode is light oil fume operating mode, the control adjustment component is in normal state, and the main fan is controlled to run at the first speed so that the oil fume gas flows into the guide structure through the auxiliary air inlet under the action of the main fan.

[0094] S322. Obtain the real-time concentration of oil fumes entering the smoke extraction plate.

[0095] S323. Based on the real-time oil fume concentration, switch the side-suction range hood from the light oil fume mode to the target mode. The target mode is either the light oil fume mode, the medium oil fume mode, or the heavy oil fume mode.

[0096] Specifically, when the side-draft range hood is in the light smoke mode, the real-time smoke concentration entering the smoke extraction plate is obtained. Based on the real-time smoke concentration, the side-draft range hood is switched from the light smoke mode to the target mode. If the target mode is the light smoke mode (i.e., the real-time smoke concentration is still less than or equal to the first smoke concentration threshold), the side-draft range hood remains in the light smoke mode, and step S321 continues. If the target mode is the medium smoke mode (i.e., the real-time smoke concentration is greater than the first smoke concentration threshold and less than the second smoke concentration threshold), the range hood can be switched from the light smoke mode to the medium smoke mode, and step S331 continues. If the target mode is the heavy smoke mode (i.e., the real-time smoke concentration is greater than the second smoke concentration threshold), the range hood can be switched from the light smoke mode to the heavy smoke mode, and step S341 continues.

[0097] S330. If the current oil fume concentration is greater than the first oil fume concentration threshold and less than the second oil fume concentration threshold, then the current operating mode of the side-suction range hood is determined to be the medium oil fume operating mode.

[0098] S331. If the current operating mode is medium oil fume operating mode, the control adjustment component is in a retracted state, increasing the opening angle between the guide vane and the auxiliary air inlet, and controlling the main fan to run at the second speed, so that the oil fume gas flows into the guide structure through the auxiliary air inlet under the action of the main fan.

[0099] S332. Obtain the real-time concentration of oil fumes entering the smoke extraction plate.

[0100] S333. Based on the real-time oil fume concentration, switch the side-suction range hood from the medium oil fume mode to the target mode. The target mode is either the light oil fume mode, the medium oil fume mode, or the heavy oil fume mode.

[0101] Specifically, when the side-draft range hood is in the medium fume mode, the real-time fume concentration entering the suction plate is obtained. Based on the real-time fume concentration, the side-draft range hood is switched from the medium fume mode to the target mode. If the target mode is the light fume mode (i.e., the real-time fume concentration is less than or equal to the first fume concentration threshold), then the mode can be switched from medium to light fume mode, and step S321 continues. If the target mode is the medium fume mode (i.e., the real-time fume concentration is greater than the first fume concentration threshold and less than the second fume concentration threshold), the side-draft range hood remains in the medium fume mode, and step S331 continues. If the target mode is the heavy fume mode (i.e., the real-time fume concentration is greater than the second fume concentration threshold), then the mode can be switched from medium to heavy fume mode, and step S341 continues.

[0102] In this embodiment, when the side-suction range hood is switched from medium oil fume mode to light oil fume mode, it is detected that the real-time oil fume concentration is lower than the fourth oil fume concentration threshold during the second duration. After stabilizing for a period of time, the main fan speed will decrease linearly, and then the side-suction range hood will be controlled to switch to light oil fume mode.

[0103] The second duration can be selected and set according to the needs of fume extraction. In this embodiment, the specific value of the second duration is not limited. Optionally, the second duration can be 15 seconds to 30 seconds.

[0104] The fourth oil fume concentration threshold is lower than the first oil fume concentration threshold. The fourth oil fume concentration threshold is the oil fume concentration threshold for determining whether the side-suction range hood has entered the light oil fume working mode. The fourth oil fume concentration threshold can be selected and set according to the determination requirements of the light oil fume working mode. In this embodiment, the specific value of the fourth oil fume concentration threshold is not specially limited.

[0105] S340. If the current oil fume concentration is greater than or equal to the second oil fume concentration threshold, then the current operating mode of the side-suction range hood is determined to be the heavy oil fume operating mode.

[0106] S341. If the current operating mode is heavy oil fume operating mode, the control adjustment component is in a retracted state, increasing the opening angle between the guide vane and the auxiliary air inlet, and controlling the main air inlet of the side-suction range hood to be in an open state, and controlling the main fan to run at the third speed, so that the oil fume gas flows into the guide structure through the auxiliary air inlet under the action of the main fan.

[0107] S342. Obtain the real-time concentration of oil fumes entering the smoke extraction plate.

[0108] S343. Based on the real-time oil fume concentration, switch the side-suction range hood from the heavy oil fume mode to the target mode. The target mode is either the light oil fume mode, the medium oil fume mode, or the heavy oil fume mode.

[0109] Specifically, when the side-suction range hood is in heavy smoke mode, the real-time smoke concentration entering the smoke extraction plate is obtained. Based on the real-time smoke concentration, the side-suction range hood is switched from heavy smoke mode to target mode. If the target mode is light smoke mode, i.e., the real-time smoke concentration is less than or equal to the first smoke concentration threshold, then the mode can be switched from heavy smoke mode to light smoke mode, and step S321 continues. If the target mode is medium smoke mode, i.e., the real-time smoke concentration is greater than the first smoke concentration threshold and less than the second smoke concentration threshold, then the mode can be switched from heavy smoke mode to medium smoke mode, and step S331 continues. If the target mode is heavy smoke mode, i.e., the real-time smoke concentration is greater than the second smoke concentration threshold, the side-suction range hood remains in heavy smoke mode, and step S341 continues.

[0110] In this embodiment, when switching the side-suction range hood from heavy smoke mode to light smoke mode or medium smoke mode, the range hood waits for the smoke concentration to remain below a certain threshold for a period of time. If the real-time smoke concentration is detected to be below a certain threshold within the first duration, the range hood is then switched to light smoke mode or medium smoke mode.

[0111] The first duration can be selected and set according to the needs of fume extraction. In this embodiment, the specific value of the first duration is not limited. Optionally, the first duration can be 15 seconds to 30 seconds.

[0112] The third oil fume concentration threshold is lower than the second oil fume concentration threshold. The third oil fume concentration threshold is the oil fume concentration threshold used to determine whether the side-suction range hood has entered a light oil fume working mode or a medium oil fume working mode. The third oil fume concentration threshold can be selected and set according to the determination requirements of the light oil fume working mode or the medium oil fume working mode. In this embodiment, the specific value of the third oil fume concentration threshold is not specially limited.

[0113] S350: Upon receiving the shutdown command of the side-suction range hood, the main fan is controlled to run for an extended set time before shutting down, and the smoke extraction plate is adjusted from the working state back to the retracted state.

[0114] Based on the above, after executing steps S321, S331 and S341, if a shutdown command for the side-suction range hood is received, the main fan is controlled to run for an extended set time before shutting down, and the smoke extraction plate is adjusted from the working state back to the retracted state.

[0115] The technical solution of this invention continuously monitors the concentration of cooking fumes and dynamically switches the operating mode according to the changes in the concentration of cooking fumes until the side-suction range hood is manually or automatically turned off. This improves the negative pressure capture efficiency under heavy cooking fume conditions, reduces noise and oil droplet splashing, while also ensuring low-noise shut-off under light cooking fume conditions. This significantly optimizes the range hood's adaptive purification capability for different cooking scenarios and enhances the user experience.

[0116] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0117] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A smoking board, characterized in that, The smoke extraction plate adopts a hollow cavity structure, and a flow guiding structure is provided inside the hollow cavity structure. The flow guiding structure includes a flow guiding plate and an adjusting component. An auxiliary air inlet is provided on the bottom plate of the hollow cavity structure. By controlling the adjusting component, the opening and closing angle between the flow guiding plate and the auxiliary air inlet is adjusted so that the oil fume gas flows into the flow guiding structure through the auxiliary air inlet under the action of the main fan.

2. The smoking board according to claim 1, characterized in that, One end of the adjusting component is fixed to the top plate of the hollow cavity structure, the other end is fixed to the top of the guide vane, and the bottom of the guide vane is fixed to the bottom plate of the hollow cavity structure.

3. The smoking board according to claim 1, characterized in that, The bottom of the guide vane is fixed to the bottom plate of the hollow cavity structure via a pivot hinge.

4. The smoking board according to claim 1, characterized in that, The adjusting element includes an elastic element and a heating element covered by the elastic element; The heating element is controlled to heat up, and the elastic element contracts when heated, increasing the opening angle between the guide vane and the auxiliary air inlet; When heating of the heating element is stopped, the elastic element returns to its normal state.

5. The smoking board according to claim 1, characterized in that, The auxiliary air inlet has multiple rows of holes arranged in an array. The spacing between the holes in each row is 22mm to 25mm, and the spacing between the holes in adjacent rows is 24mm to 26mm.

6. The smoking board according to claim 1, characterized in that, The auxiliary air inlet is located on the bottom plate of the hollow cavity structure facing the stove and has an inclined angle ranging from 15 degrees to 30 degrees.

7. The smoking board according to claim 1, characterized in that, The smoke extraction plate also includes a gas sensor, which is located at the air outlet of the airflow guiding structure.

8. A side-suction range hood, characterized in that, The side-suction range hood includes the smoke extraction plate as described in any one of claims 1-7.

9. A control method for a side-suction range hood, characterized in that, Applied to the side-suction range hood as described in claim 8, the control method of the side-suction range hood includes: After the side-suction range hood is turned on, obtain the current oil fume concentration; Based on the current state of the oil fume concentration control and adjustment component, the opening and closing angle of the guide vane and the auxiliary air inlet is adjusted so that the oil fume gas flows into the guide structure through the auxiliary air inlet under the action of the main fan.

10. The control method for a side-suction range hood according to claim 9, characterized in that, Based on the current state of the oil fume concentration control and adjustment component, the opening and closing angles of the guide vane and the auxiliary air inlet are adjusted, including: The current operating mode of the side-suction range hood is determined based on the current oil fume concentration, and the state of the adjusting component is controlled according to the current operating mode to adjust the opening and closing angle of the guide vane and the auxiliary air inlet.

11. The control method for a side-suction range hood according to claim 10, characterized in that, Determining the current operating mode of the side-suction range hood based on the current oil fume concentration includes: If the current oil fume concentration is less than or equal to the first oil fume concentration threshold, then the current operating mode of the side-suction range hood is determined to be the light oil fume operating mode. If the current oil fume concentration is greater than the first oil fume concentration threshold and the current oil fume concentration is less than the second oil fume concentration threshold, then the current operating mode of the side-suction range hood is determined to be the medium oil fume operating mode. If the current oil fume concentration is greater than or equal to the second oil fume concentration threshold, then the current operating mode of the side-suction range hood is determined to be the heavy oil fume operating mode.

12. The control method for a side-suction range hood according to claim 10, characterized in that, The current operating mode is either a light oil fume operating mode, a medium oil fume operating mode, or a heavy oil fume operating mode; The control adjuster is positioned according to the current operating mode to adjust the opening angle of the guide vane and the auxiliary air inlet, including: If the current operating mode is the light oil fume operating mode, then the regulating component is controlled to be in the normal state; If the current operating mode is the medium oil fume operating mode, then the adjusting component is controlled to be in a retracted state, increasing the opening angle between the guide vane and the auxiliary air inlet; If the current operating mode is the heavy oil fume operating mode, then the adjusting component is controlled to be in a retracted state, the opening and closing angle between the guide vane and the auxiliary air inlet is increased, and the main air inlet of the side-suction range hood is controlled to be in an open state.

13. The control method for a side-suction range hood according to any one of claims 11 or 12, characterized in that, After adjusting the opening angle of the air guide vanes and the auxiliary air inlet, the following steps are also included: If the current operating mode is the light oil fume operating mode, then control the main fan to run at the first speed; If the current operating mode is the medium oil fume operating mode, then control the main fan to run at the second speed; If the current operating mode is the heavy oil fume operating mode, then control the main fan to run at the third speed; Wherein, the first rotational speed is less than the second rotational speed, and the second rotational speed is less than the third rotational speed.

14. The control method for a side-suction range hood according to any one of claims 11 or 12, characterized in that, After adjusting the opening angle of the air guide vanes and the auxiliary air inlet, the following steps are also included: Obtain the real-time concentration of oil fumes entering the smoke-absorbing plate; Based on the real-time oil fume concentration, the side-suction range hood is switched from the current operating mode to the target operating mode, where the target operating mode is the light oil fume operating mode, the medium oil fume operating mode, or the heavy oil fume operating mode.

15. The control method for a side-suction range hood according to claim 14, characterized in that, The control method for the side-suction range hood also includes: When switching the side-suction range hood from the heavy oil fume mode to the light oil fume mode or the medium oil fume mode, if the real-time oil fume concentration is detected to be lower than the third oil fume concentration threshold within the first duration, then the side-suction range hood is controlled to switch to the light oil fume mode or the medium oil fume mode. When switching the side-suction range hood from the medium oil fume mode to the light oil fume mode, if the real-time oil fume concentration is detected to be lower than the fourth oil fume concentration threshold within the second duration, then the side-suction range hood is controlled to switch to the light oil fume mode. Wherein, the third oil fume concentration threshold is less than the second oil fume concentration threshold, and the fourth oil fume concentration threshold is less than the first oil fume concentration threshold.

16. The control method for a side-suction range hood according to claim 9, characterized in that, The control method for the side-suction range hood also includes: Upon receiving the shutdown command from the side-suction range hood, the system controls the main fan to run for an extended set time before shutting it off, and adjusts the smoke extraction plate from the working state back to the retracted state.

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