Range hood

Abstract

The application discloses a range hood. The range hood has a front side and a rear side opposite to the front side in a first direction. The range hood comprises a frame, a hood assembly and an air outlet device. The hood assembly is mounted on the frame, the frame and the hood assembly are arranged in a second direction, the hood assembly has a hood opening for sucking smoke, and the first direction and the second direction intersect. The air outlet device is mounted on the front side of the hood assembly, and the air outlet device has an air outlet opening. The air outlet device has a first air outlet state and a second air outlet state, and the air outlet device can be switched to the first air outlet state or the second air outlet state according to different working conditions of the range hood during work. The air outlet directions and / or air outlet volumes of the first air outlet state and the second air outlet state are different. Through the above manner, the smoke suction effect of the range hood can be optimized.

Description

Technical Field

[0001] This application relates to the field of kitchen appliance technology, and in particular to range hoods. Background Technology

[0002] In modern kitchens, range hoods effectively remove cooking fumes, ensuring a clean and healthy environment. With the continuous development of range hood technology, higher demands are being placed on their performance. The smoke extraction efficiency is a key performance indicator, and improving this efficiency requires ongoing research and innovation. Utility Model Content

[0003] The embodiments of this application provide a range hood that can improve the smoke extraction effect of the range hood.

[0004] This application provides a range hood. The range hood has a front side and a rear side opposite to it in a first direction. The range hood includes a frame, a smoke collection assembly, and an air outlet device. The smoke collection assembly is mounted on the frame, and the frame and the smoke collection assembly are arranged in a second direction. The smoke collection assembly has a smoke collection port for drawing in smoke, and the first and second directions intersect. The air outlet device is mounted on the front side of the smoke collection assembly and has an air outlet. The air outlet device has a first air outlet state and a second air outlet state. The air outlet device can switch to the first air outlet state or the second air outlet state according to different operating conditions of the range hood. The air outlet direction and / or air volume are different in the first air outlet state and the second air outlet state.

[0005] Optionally, the air volume of the air outlet device in the first air outlet state is less than or equal to the air volume of the air outlet device in the second air outlet state.

[0006] Optionally, in the first air outlet state, the air outlet direction at the air outlet has a component toward the rear and a component toward the smoke collection port; in the second air outlet state, the air outlet direction at the air outlet has a component toward the rear and a component away from the smoke collection port.

[0007] Optionally, the range hood also has a third direction, which is perpendicular to the first and second directions. When the air outlet is in the first air outlet state, the air outlet direction has a rearward component in the first direction and a component towards the smoke collection port in the third direction. When the air outlet is in the second air outlet state, the air outlet direction has a rearward component in the first direction and a component away from the smoke collection port in the third direction.

[0008] Optionally, when the air outlet device is in the first air outlet state, the air outlet direction at the air outlet does not have a component in the third direction that is away from the smoke collection port.

[0009] Optionally, when the air outlet device is in the second air outlet state, the air outlet direction at the air outlet does not have a component in the third direction that is close to the smoke collection port.

[0010] Optionally, when the air outlet device is in the first air outlet state, the angle between the air outlet direction and the first direction on the bottom surface of the smoke collection assembly is less than or equal to 20 degrees.

[0011] Optionally, when the air outlet device is in the second air outlet state, the angle between the air outlet direction and the first direction on the bottom surface of the smoke collection assembly is less than or equal to 30 degrees.

[0012] Optionally, the air outlet direction has a component away from the frame in the second direction, and the angle between the air outlet direction and the horizontal plane is less than or equal to 45 degrees.

[0013] When the air outlet is in the first air outlet state, the angle between the air outlet direction and the horizontal plane is smaller than the angle between the air outlet direction and the horizontal plane when the air outlet is in the second air outlet state.

[0014] Optionally, the air outlet device is movably equipped with an air guide plate, which is correspondingly arranged with the air outlet. The air guide plate has a first position and a second position. When the air guide plate is in the first position, the rear end of the air guide plate in the first direction is closer to the smoke collection port than the front end. When the air guide plate is in the second position, the rear end of the air guide plate in the first direction is farther away from the smoke collection port than the front end. When the air guide plate is in the first position, the air outlet device is in the first air outlet state. When the air guide plate is in the second position, the air outlet device is in the second air outlet state.

[0015] Optionally, the air outlet device has a first air outlet channel and a second air outlet channel. The air outlet includes a first air outlet corresponding to the first air outlet channel and a second air outlet corresponding to the second air outlet channel. The normal of the first air outlet has a rearward component in a first direction and a component towards the frame in a third direction. The normal of the second air outlet has a rearward component in the first direction and a component away from the frame in a third direction. When the air outlet device is in the first air outlet state, air is discharged through the first air outlet channel. When the air outlet device is in the second air outlet state, air is discharged through the second air outlet channel.

[0016] Optionally, the smoke hood includes a centrifugal fan installed in the frame, wherein the speed of the centrifugal fan is less when the air outlet device is in the first air outlet state than when the air outlet device is in the second air outlet state.

[0017] The beneficial effects of this application are as follows: Unlike the prior art, the above method enables the air outlet device to have different first air outlet states and second air outlet states. The different first air outlet states and second air outlet states can correspond to different working conditions of the range hood, thereby allowing the air outlet strategy to be flexibly adjusted according to the actual cooking situation, and thus optimizing the smoke extraction effect. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of an embodiment of the smoke machine of this application;

[0019] Figure 2 yes Figure 1 The diagram shows the structure of the range hood from another angle.

[0020] Figure 3 yes Figure 1 The diagram shows the structure of the range hood from another angle.

[0021] Figure 4 This is a schematic diagram of the air outlet device in the first air outlet state of the smoke hood embodiment of this application;

[0022] Figure 5 This is a schematic diagram of the air outlet device in the second air outlet state of the smoke machine embodiment of this application. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0024] Combination Figure 1 and Figure 2 This application provides a smoke hood 1. The smoke hood 1 includes a frame 10 and a smoke collection assembly 20, with a smoke collection port 211 provided on the smoke collection assembly 20. The smoke collection assembly 20 is mounted on the frame 10, and the smoke hood 1 can be mounted on a wall or other installation location via the frame 10. The smoke hood 1 has a mounting surface; for example, if the smoke hood 1 is mounted on a wall, the surface of the smoke hood 1 that abuts against the wall is the mounting surface of the smoke hood 1. The frame 10 is provided with an exhaust port (not shown), which can be connected to an external flue via a pipe. A volute (not shown) is also provided inside the frame 10, and a centrifugal impeller (not shown) is provided inside the volute. The volute can communicate with the interior of the smoke collection assembly 20, and the convection generated by the rotation of the centrifugal impeller can drive the gas inside the smoke collection assembly 20 to the exhaust port for discharge. The smoke collection assembly 20 is mounted on the frame 10, and the smoke collection assembly 20 can gather and collect the smoke, which is then discharged through the frame 10.

[0025] It should be noted that, for ease of description, this application uses a first direction (illustrated by X in the figures), a second direction (illustrated by Y in the figures), and a third direction (illustrated by Z in the figures) to exemplarily describe the relative positional relationships of the components. Specifically, the range hood 1 has a front side closer to the user and a rear side opposite to it in the first direction. In a kitchen setting, the front side faces the user, and the rear side faces the wall. The second direction is the arrangement direction of the frame 10 and the smoke collection assembly 20. The third direction is perpendicular to the first and second directions. In some embodiments, the first direction is a front-to-back direction, the second direction is a vertical direction, and the third direction is a left-to-right direction from the user's perspective. The first and second directions intersect. Optionally, the first, second, and third directions are perpendicular to each other.

[0026] In some embodiments, the smoke hood 1 includes a front plate 23 and a rear plate spaced apart in a first direction, and side plates spaced apart in a third direction. The smoke hood 1 also includes a base plate 21, with the front plate 23, rear plate, and side plates surrounding the circumference of the base plate 21, and a smoke collection port 211 formed on the base plate 21. In a second direction, the end of the base plate 21 near the front is further away from the frame 10 than the end of the base plate 21 near the rear. In other words, in the smoke hood 1 provided in this application, the base plate 21 is inverted with a lower front and a higher rear. By inverting the base plate 21 with a lower front and a higher rear, the pressure radiation direction of the smoke hood 1 can be optimized, the negative pressure area can be increased, and the smoke extraction effect can be improved. Optionally, the distance between the base plate 21 and the frame 10 gradually decreases in the direction from the front to the rear.

[0027] In some embodiments, combined with Figure 2 The smoke collection assembly 20 also includes a front plate 23 connected to the front side of the top plate and the bottom plate 21, a rear plate connected to the rear side of the top plate and the bottom plate 21, and two side plates (not labeled) arranged opposite to each other, which are respectively connected to the front plate 23 and the rear plate.

[0028] In some embodiments, the distance between the front side of the frame 10 and the front side of the front panel 23 in the first direction is less than or equal to 15 mm. In this way, the front side of the smoke collection assembly 20 protrudes less from the frame 10, making it easier to align the front side of the range hood 1 flush with the front side of the cabinet, or to directly embed the range hood 1 within the cabinet without exposing its front side to the user's view. Through these technical means, the range hood 1 can be installed concealed at all times, which is beneficial to the aesthetics of the kitchen.

[0029] In some embodiments, the distance between the front panel 23 and the rear panel is less than or equal to 370 mm and greater than or equal to 300 mm. In this way, the smoke collection assembly 20 can have a smaller size, so that when the smoke collection assembly 20 is fitted with the wall on the rear side, the front side protrudes less from the cabinet, which is beneficial for achieving a flush installation of the front side of the range hood 1 with the cabinet or a fully concealed installation.

[0030] Combination Figures 3 to 5 The smoke hood 1 provided in this embodiment includes a frame 10, a smoke collection assembly 20, and an air outlet 24. The air outlet 24 is installed on the front side of the smoke collection assembly 20 and has an air outlet 241. The air outlet 24 can drive the airflow below the smoke hood 1 to move towards the rear, thereby allowing the smoke to move rearward and improving the smoke extraction effect of the smoke hood 1. The air outlet 24 has a first air outlet state (in conjunction with...). Figure 4 ) and second air outlet state (combined) Figure 5 The air outlet device 24 can switch to a first air outlet state or a second air outlet state according to different operating conditions of the range hood 1. The air outlet direction and / or air volume are different in the first air outlet state and the second air outlet state. When the user uses different cooking methods, or at different stages of a cooking method, the amount of smoke produced is different. In order to effectively interfere with the exhaust of smoke under different smoke production conditions, the air outlet device 24 can be set to a first air outlet state and a second air outlet state. Different first air outlet states and second air outlet states can correspond to different operating conditions of the range hood, thereby flexibly adjusting the air outlet strategy according to the actual cooking situation, and thus optimizing the smoke extraction effect. Among them, the first air outlet state and the second air outlet state can have the same air volume but different air outlet directions. The first air outlet state and the second air outlet state can have different air volume but the same air outlet direction. The first air outlet state and the second air outlet state can have different air volume and different air outlet directions.

[0031] In some embodiments, in the first air outlet state, the air outlet 24 has a rearward component and a component towards the smoke collection port 211 in the air outlet direction. In other words, in the first air outlet state, the air outlet 24 blows air rearward while simultaneously blowing air towards the inside of the range hood 1 (third-sided upward). Optionally, the air outlet 24 is disposed on at least one side of the smoke collection port 211 in the third-sided upward direction. In the first air outlet state, the air outlet 24 blows air rearward and towards the smoke collection port 211. In the second air outlet state, the air outlet 24 has a rearward component and a component away from the smoke collection port 211 in the air outlet direction. In other words, in the second air outlet state, the air outlet 24 blows air rearward while simultaneously blowing air towards the outside of the range hood 1 (third-sided upward). Optionally, the air outlet device 24 is disposed on at least one side of the smoke collection port 211 in a third direction. In the second air outlet state, the air outlet device 24 faces rearward and exits away from the smoke collection port 211. Through this method, the air outlet device 24 can have two different air outlet states, which can correspond to different operating conditions of the range hood 1, thus allowing for flexible adjustment of the air outlet strategy according to the actual cooking situation. In the first air outlet state, the component of the air outlet direction facing rearward can move the smoke backward, while the component facing the smoke collection port can exert a thrust on the smoke, converging it towards the center of the range hood 1 (or the smoke collection port 211), thereby improving the smoke exhaust efficiency. In the second air outlet state, the component of the air outlet direction facing the rear can drive the flue gas backward. The component away from the smoke collection port and the component facing the rear work together to enable the air outlet device 24 to generate a stronger force to drive the flue gas backward with a larger air volume, while reducing the impact on the flue gas at the smoke collection port 211 and reducing the situation where the air outlet device 24 blows away the flue gas.

[0032] In some embodiments, the range hood 1 includes a centrifugal fan disposed within the frame 10. When the air outlet device 24 is in a first air outlet state, the rotational speed of the centrifugal fan is lower than when the air outlet device 24 is in a second air outlet state. Specifically, the first air outlet state corresponds to a lower speed setting of the range hood 1, while the second air outlet state corresponds to a higher speed setting. The speed setting of the range hood 1 is directly reflected in the rotational speed of the centrifugal fan. By setting the first air outlet state to correspond to a low centrifugal fan speed and the second air outlet state to correspond to a high centrifugal fan speed, the smoke extraction effect of the range hood 1 can be improved.

[0033] Specifically, the amount of smoke produced by a user during cooking is not uniform, but varies in intensity. When the smoke produced during cooking is relatively light, the range hood 1 operates at a lower speed (the centrifugal fan operates at a lower speed). At this time, the suction force on the smoke is weaker, and the smoke experiences less suction that draws it towards the center of the range hood 1. In this situation, by setting the air outlet 24 to have a component pointing towards the smoke collection port 211, the force that draws the smoke towards the center of the range hood 1 can be supplemented. Simultaneously, because the range hood 1 operates at a low speed and produces less smoke, the component of the air outlet 24 pointing towards the smoke collection port 211 has a limited impact on the smoke and will not disperse it.

[0034] When the smoke generated during cooking is heavy, the range hood 1 operates at a higher speed (the centrifugal fan rotates at a higher speed). The range hood 1 can provide enough force to gather the smoke towards the center of the range hood 1. At this time, by setting the component of the air outlet direction of the air outlet device 24 to be directed away from the smoke collection port 211, the air outlet device 24 can provide a stronger backward airflow effect while reducing the impact of the air outlet on the smoke and reducing the situation where the air outlet device 24 blows away the smoke.

[0035] Switching between the first and second air outlet states can be done manually by the user. Alternatively, switching can be based on the intensity of smoke detected by various sensors, such as those used in conjunction with the cooktop and range hood, a camera, temperature sensors, and smoke detectors. The switching can also be synchronized with the speed setting of the centrifugal fan in the range hood 1. For example, when the centrifugal fan is below a preset speed, the air outlet device 24 switches to the first air outlet state. When the centrifugal fan is above the preset speed, the air outlet device 24 switches to the second air outlet state.

[0036] In some embodiments, in the first air outlet state, the air outlet direction at the air outlet 241 has a rearward component in the first direction and a component towards the smoke collection port 211 in the third direction. In the second air outlet state, the air outlet direction at the air outlet 241 has a rearward component in the first direction and a component away from the smoke collection port 211 in the third direction. Based on the above embodiments, the limitation of the air outlet direction of the air outlet 24 in this application is a limitation of the projection of the air outlet direction onto the plane formed by the first direction and the third direction. In this embodiment, the component of the air outlet direction of the air outlet 24 in the second direction is not specifically limited.

[0037] Furthermore, in some embodiments, when the air outlet device 24 is in the first air outlet state, the air outlet direction at the air outlet 241 does not have a component in the third direction that is away from the smoke collection port 211. If the air outlet device 24 has a component in the third direction that is away from the smoke collection port 211 (i.e., an outward component) in the first air outlet state, it will affect the air outlet device 24's blowing towards the center and towards the rear, making it difficult to form a stable air curtain to achieve airflow diversion.

[0038] Furthermore, in some embodiments, when the air outlet device 24 is in the second air outlet state, the air outlet direction at the air outlet 241 does not have a component in the third upward direction that is close to the smoke collection port 211. If the air outlet device 24 has a component in the third upward direction that is close to the smoke collection port 211 when it is in the second air outlet state, the air outlet of the air outlet device 24 will affect the gathering of the smoke hood 1, and may easily cause the smoke structure to be blown away.

[0039] In some embodiments, when the air outlet device 24 is in the first air outlet state, the angle between the air outlet direction at the air outlet 241 and the first direction on the bottom surface of the smoke collection assembly 20 is less than or equal to 20 degrees. If the angle between the air outlet direction at the air outlet 241 and the first direction on the bottom surface of the smoke collection assembly 20 is greater than 20 degrees when the air outlet device 24 is in the first air outlet state, it will cause excessive interference to the smoke structure, easily dispersing the smoke structure. In cases where the angle is larger, it may even create an air curtain, causing smoke to be blocked from entering below the smoke collection port 211. Here, the angle refers to the angle between the projection of the air outlet direction of the air outlet 241 onto the horizontal plane and the first direction.

[0040] In some embodiments, when the air outlet device 24 is in the second air outlet state, the angle between the air outlet direction at the air outlet 241 and the first direction on the bottom surface of the smoke collection assembly 20 is less than or equal to 30 degrees. If, in the second air outlet state, the angle between the air outlet direction at the air outlet 241 and the first direction on the bottom surface of the smoke collection assembly 20 is greater than 30 degrees, the rearward component of the air outlet direction at the air outlet 241 will decrease, thus weakening the smoke-guiding effect of the air outlet device 24. In cases where the angle is larger, it may even lead to smoke being drawn outwards, causing smoke to escape. Here, the angle refers to the angle between the projection of the air outlet direction of the air outlet 241 onto the horizontal plane and the first direction.

[0041] In some embodiments, the air volume of the air outlet device 24 in the first air outlet state is less than or equal to the air volume of the air outlet device 24 in the second air outlet state. In the first air outlet state, the impact of the air outlet device 24 on the flue gas structure needs to be considered. By setting the air outlet device 24 to have a smaller air volume in the first air outlet state, the impact of the air outlet device 24 on the flue gas structure can be reduced. In the second air outlet state, by setting the air outlet device 24 to have a larger air volume, the diversion effect of the air outlet device 24 on the flue gas can be enhanced, further promoting the backward movement of the flue gas.

[0042] In some embodiments, the air outlet direction at the air outlet 241 has a component in the second direction that is away from the frame 10, and the angle between the air outlet direction at the air outlet 241 and the horizontal plane is less than or equal to 45 degrees. By setting the air outlet direction to have a downward component, the air outlet device 24 can form an air curtain on both sides of the range hood 1, thereby reducing the amount of supplementary air entering the middle of the range hood 1 from both sides when the range hood 1 is working. With the suction power of the range hood 1 remaining constant, the reduction of supplementary air on both sides of the range hood 1 increases the amount of supplementary air at the front of the smoke, thereby further promoting the backward movement of the smoke.

[0043] In some embodiments, when the air outlet device 24 is in the first air outlet state, the angle between the air outlet 241 and the horizontal plane is smaller than the angle between the air outlet 241 and the horizontal plane when the air outlet device 24 is in the second air outlet state. Based on the above embodiments, the first air outlet state corresponds to the case of lighter smoke, and the second air outlet state corresponds to the case of heavier smoke. When the smoke is lighter, the smaller angle between the air outlet 241 and the horizontal plane allows the air outlet device 24 to provide appropriate assistance in concentrating the smoke. Otherwise, the air outlet device 24's air outlet might guide the smoke downwards, resulting in the smoke not being effectively discharged. When the smoke is heavier, the larger angle between the air outlet 241 and the horizontal plane allows the air outlet device 24's air outlet to form an air curtain to block the supplementary air on both sides of the smoke, thereby achieving the aforementioned technical effect of promoting the backward movement of smoke.

[0044] In some embodiments, the air outlet device 24 is movably provided with an air guide plate, which is correspondingly disposed with the air outlet 241. The air guide plate has a first position and a second position. When the air guide plate is in the first position, the rear end of the air guide plate in a first direction is closer to the smoke collection port 211 than the front end. When the air guide plate is in the second position, the rear end of the air guide plate in the first direction is farther away from the smoke collection port 211 than the front end. In the first position, the air guide plate extends obliquely towards the smoke collection port 211 in a direction from the front to the rear. In the second position, the air guide plate extends obliquely away from the smoke collection port 211 in a direction from the front to the rear. By providing the air guide plate, the air outlet device 24 can be directed in a rearward and inward direction when in the first position, and the air outlet device 24 can be directed in a rearward and inward direction when in the second position. In other words, when the air guide plate is in the first position, the air outlet device 24 is in the first air outlet state, and when the air guide plate is in the second position, the air outlet device 24 is in the second air outlet state.

[0045] In some embodiments, the air outlet device 24 has a first air outlet channel and a second air outlet channel. The air outlet 241 includes a first air outlet corresponding to the first air outlet channel and a second air outlet corresponding to the second air outlet channel. The normal of the first air outlet has a rearward component in a first direction and a component towards the smoke collection port 211 in a third direction. The normal of the second air outlet has a rearward component in the first direction and a component away from the smoke collection port 211 in a third direction. When the air outlet device 24 is in the first air outlet state, air is discharged through the first air outlet channel; when the air outlet device 24 is in the second air outlet state, air is discharged through the second air outlet channel. The first air outlet channel and the second air outlet channel may correspond to a first fan and a second fan, respectively. In the first air outlet state, the first fan starts and the second fan stops; in the second air outlet state, the second fan starts and the first fan stops. Optionally, the fan is movably configured, having a third position and a fourth position. In the third position, the fan discharges air towards the first air outlet channel, and in the fourth position, the fan discharges air towards the second air outlet channel.

[0046] Based on the above embodiments, the air outlet direction of the air outlet 241 can be referenced by the normal direction of the plane where the air outlet 241 is located.

[0047] The above are merely embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A range hood, characterized in that, The range hood has a front side and an opposite rear side in a first direction, including: frame; A smoke collection assembly is mounted on the frame, the frame and the smoke collection assembly are arranged in a second direction, the smoke collection assembly has a smoke collection port for drawing in smoke, and the first direction and the second direction intersect. An air outlet device is installed on the front side of the smoke collection assembly, and the air outlet device has an air outlet; The air outlet device has a first air outlet state and a second air outlet state. The air outlet device can switch to the first air outlet state or the second air outlet state according to different working conditions of the range hood. The air outlet direction and / or air outlet volume are different in the first air outlet state and the second air outlet state.

2. The range hood according to claim 1, characterized in that: In the first air outlet state, the air outlet direction has a component toward the rear and a component toward the smoke collection port; in the second air outlet state, the air outlet direction has a component toward the rear and a component away from the smoke collection port.

3. The range hood according to claim 1, characterized in that: The air volume of the air outlet device in the first air outlet state is less than or equal to the air volume of the air outlet device in the second air outlet state.

4. The range hood according to claim 1, characterized in that: The range hood also has a third direction, which is perpendicular to the first direction and the second direction. When the air outlet is in the first air outlet state, the air outlet direction at the air outlet has a component toward the rear side in the first direction and a component toward the smoke collection port in the third direction. When the air outlet device is in the second air outlet state, the air outlet direction at the air outlet has a component toward the rear side in the first direction, and a component away from the smoke collection port in the third direction.

5. The range hood according to claim 4, characterized in that: When the air outlet is in the first air outlet state, the air outlet direction at the air outlet does not have a component away from the direction of the smoke collection port in the third direction.

6. The range hood according to claim 4, characterized in that: When the air outlet device is in the second air outlet state, the air outlet direction at the air outlet does not have a component close to the direction of the smoke collection port in the third direction.

7. The range hood according to claim 1, characterized in that: When the air outlet is in the first air outlet state, the angle between the air outlet direction and the first direction on the bottom surface of the smoke collection assembly is less than or equal to 20 degrees.

8. The range hood according to claim 1, characterized in that: When the air outlet is in the second air outlet state, the angle between the air outlet direction and the first direction on the bottom surface of the smoke collection assembly is less than or equal to 30 degrees.

9. The range hood according to claim 1, characterized in that: The air outlet has a component in the second direction that moves away from the frame, and the angle between the air outlet and the horizontal plane is less than or equal to 45 degrees. When the air outlet device is in the first air outlet state, the angle between the air outlet direction and the horizontal plane is smaller than the angle between the air outlet direction and the horizontal plane when the air outlet device is in the second air outlet state.

10. The range hood according to claim 1, characterized in that: The air outlet device is movably equipped with an air guide plate, which is correspondingly arranged with the air outlet. The air guide plate has a first position and a second position. When the air guide plate is in the first position, the rear end of the air guide plate in the first direction is closer to the smoke collection port than the front end. When the air guide plate is in the second position, the rear end of the air guide plate in the first direction is farther away from the smoke collection port than the front end. When the air guide plate is in the first position, the air outlet device is in the first air outlet state. When the air guide plate is in the second position, the air outlet device is in the second air outlet state.

11. The range hood according to claim 4, characterized in that: The air outlet device has a first air outlet channel and a second air outlet channel. The air outlet includes a first air outlet corresponding to the first air outlet channel and a second air outlet corresponding to the second air outlet channel. The normal of the first air outlet has a component toward the rear side in the first direction and a component toward the smoke collection port in the third direction. The normal of the second air outlet has a component toward the rear side in the first direction and a component away from the smoke collection port in the third direction. When the air outlet device is in the first air outlet state, it outlets air through the first air outlet channel; when the air outlet device is in the second air outlet state, it outlets air through the second air outlet channel.

12. The range hood according to claim 1, characterized in that: The smoke hood includes a centrifugal fan installed in the frame. When the air outlet device is in the first air outlet state, the rotational speed of the centrifugal fan is less than the rotational speed of the centrifugal fan when the air outlet device is in the second air outlet state.

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