Range hood

Abstract

The present application relates to a range hood, comprising a housing and a smoke shield. The housing defines an air inlet, the smoke shield is provided with a rotating shaft, and the smoke shield includes a first smoke shield portion and a second smoke shield portion, respectively located on either side of the rotating shaft. The smoke shield is rotatably mounted on the air inlet about the rotating shaft. When the smoke shield rotates to a closed position, the air inlet is closed. When the smoke shield rotates to a balanced position, the air inlet is opened. The first smoke shield portion is spaced apart from and encloses one side edge of the air inlet to form a first inlet, and the second smoke shield portion is spaced apart from and encloses another side edge of the air inlet to form a second inlet. The smoke shield is tilted relative to a height direction X of the range hood, and the height of the second smoke shield portion is greater than that of the first smoke shield portion. As the smoke shield switches from the closed position to the balanced position, the degree of inclination of the smoke shield relative to the height direction X of the range hood gradually increases. The range hood provided by the present application can prevent the smoke shield from blocking the user's view and can reduce the escape of oil smoke.

Description

[0001] Related applications

[0002] This application claims priority to Chinese patent application number 2024109359795, filed on July 12, 2024, entitled “Range Hood”, the contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the technical field of range hoods, and in particular to a range hood. Background Art

[0004] The side-suction range hoods commonly seen on the market have a common fan placement method in which the fan smoke inlet is parallel to the wall on which the range hood is placed, and the front and rear sides of the fan can achieve double-sided air intake. In order to better match the front and rear double-sided air intake method of the fan, a feasible method is to set two front and rear air inlets on the lower side smoke collection hood, and a rotatable smoke baffle to block the air inlet when the range hood is turned off. The conventional smoke baffle setting method is to set the rotating shaft at the outermost side of the air inlet, such as Chinese patent CN218583239U. When the range hood is working, the smoke baffle flips open to the outside. A problem with this is that the flipped open smoke baffle easily blocks the user's line of sight and interferes with the user's operation during cooking, causing great inconvenience to the user. However, if no smoke baffle is set here, on the one hand, the air inlet is not blocked when the range hood is turned off, and the aesthetics is poor. On the other hand, the oil smoke here is very easy to escape when the range hood is working. Summary of the Invention

[0005] Based on this, it is necessary to provide a range hood that can facilitate opening or closing the air inlet while preventing the smoke shield from blocking the user's vision or interfering with the user's cooking experience, and can reduce the escape of oil smoke.

[0006] The smoke shield is provided with a first smoke shield portion and a second smoke shield portion respectively located on both sides of the rotating shaft. The smoke shield is rotatably installed around the rotating shaft to the air inlet, and the smoke shield has a closed position and a balanced position. When the smoke shield is rotated to the closed position, the air inlet is closed; when the smoke shield is rotated to the balanced position, the air inlet is opened, and the first smoke shield portion is flipped toward the inside of the shell relative to the air inlet to be spaced apart from and surrounded by an edge of one side of the air inlet to form a first inlet, and the second smoke shield portion is flipped toward the outside of the shell relative to the air inlet to be spaced apart from and surrounded by an edge of the other side of the air inlet to form a second inlet; the smoke shield is tilted relative to a height direction X of the range hood, and the height of the second smoke shield portion is greater than that of the first smoke shield portion. As the smoke shield switches from the closed position to the balanced position, the inclination of the smoke shield relative to the height direction X of the range hood gradually increases.

[0007] In one embodiment, the housing is provided with an air deflector extending from an edge of the air inlet near the second smoke shield toward the exterior of the housing and expanding outward relative to the air inlet. The air deflector is configured to guide cooking fumes into the second inlet. It is understood that this configuration can help gather cooking fumes toward the second inlet.

[0008] In one embodiment, the housing further includes an extension plate that is slidably connected to the air deflector along the extension direction of the air deflector, and the extension plate has a retracted position and an extended position. When the extension plate is in the retracted position, the extension plate is located on the surface of the air deflector; when the extension plate is in the extended position, the extension plate can extend beyond the end of the air deflector away from the air inlet. It will be understood that with this arrangement, when the extension plate is in the extended position, the extension plate can function to extend the air deflector.

[0009] In one embodiment, when the extension plate is in the maximum extended position, the extension plate and the air guide plate are connected seamlessly. It is understood that such a configuration can prevent oil smoke from escaping through the gap between the extension plate and the air guide plate, thereby affecting the oil smoke absorption effect.

[0010] In one embodiment, the range hood further includes a connecting structure connecting the second smoke shield and the extension plate; wherein, as the smoke shield rotates about the rotation axis, the second smoke shield can drive the extension plate to slide relative to the air guide plate via the connecting structure. It will be appreciated that this arrangement enables the second smoke shield to be linked to the extension plate, eliminating the need for a separate drive mechanism to drive the extension plate to slide relative to the air guide plate.

[0011] In one embodiment, the connecting structure includes a connecting rod and a slider, one end of the connecting rod is hinged to the second smoke barrier, and the other end is hinged to the extension plate; the slider is fixedly mounted on the extension plate, the air guide plate is provided with a guide rail, and the slider is slidably connected to the guide rail.

[0012] In one embodiment, the air deflector has a through hole. The guide rail is located on the side of the air deflector facing away from the extension plate and has a chute. The chute is connected to the through hole through its opening, and a stop step is provided at the opening of the chute. One end of the slider slides within the chute and stops on the stop step, while the other end extends out of the through hole and is fixedly connected to the extension plate. It is understood that with this arrangement, the stop step prevents the slider from escaping from the chute through the opening. The hinged seat and the slider are respectively connected to opposite sides of the extension plate.

[0013] In one embodiment, when the smoke shield is rotated to the equilibrium position, the second smoke shield portion does not extend beyond the air guide plate along the thickness direction Y of the range hood. It is understood that with this arrangement, the air guide plate can also prevent oil smoke inside the housing from escaping from the second inlet to the outside of the housing.

[0014] In one embodiment, the range hood further comprises a fan, which is installed inside the housing. The surface area of ​​the first smoke barrier portion is larger than the surface area of ​​the second smoke barrier portion, and the center of gravity of the smoke barrier is located at the first smoke barrier portion. When the smoke barrier is in a closed position and the fan provides a suction force toward the interior of the housing, the smoke barrier can rotate about the rotation axis to a balanced position and stop rotating at the balanced position to keep the air inlet open. When the suction force disappears, the smoke barrier can fall back to the closed position under the action of its own gravity. It can be understood that with such an arrangement, the smoke barrier can automatically open or close the air inlet by utilizing the suction force provided by the fan without the need for an additional drive device, which is relatively low in cost.

[0015] In one embodiment, a first stop plate and a second stop plate are respectively provided at opposite ends of the air inlet. When the smoke shield is in the closed position, along the range hood's height direction X, the first stop plate abuts below the first smoke shield, and the second stop plate abuts above the second smoke shield. It will be appreciated that this arrangement allows the smoke shield to remain in the closed position and prevent it from rotating about the axis under its own weight.

[0016] Compared to related structures in which the smoke shield flips around one side edge toward the outside of the housing, the range hood provided by the present application rotates from a closed position to a balanced position, with the first smoke shield flipping around the rotation axis toward the inside of the housing, and the second smoke shield flipping around the rotation axis toward the outside of the housing. That is, only the second smoke shield extends out of the air inlet, making the volume of the smoke shield extending out of the air inlet relatively small, thereby helping to prevent the extended smoke shield from blocking the user's view or interfering with the user's cooking. Furthermore, along the height direction X of the range hood, as oil smoke rises from the bottom to the outer surface of the smoke shield, it is split into two paths along the outer surface of the smoke shield, one path of oil smoke entering the interior of the housing through the first inlet, and the other path of oil smoke entering the interior of the housing through the second inlet. That is, the smoke shield has a rectifying and buffering effect, thereby helping to improve the oil smoke extraction effect. Furthermore, as the smoke deflector switches from the closed position to the balanced position, the inclination of the smoke deflector relative to the height direction X of the range hood gradually increases, that is, as the smoke deflector switches from the closed position to the balanced position, the slope of the smoke deflector becomes smaller and becomes more gentle. This will weaken the wall-attachment diversion effect of the smoke deflector on the oil smoke entering the shell from the first inlet, making it difficult for this part of the oil smoke to flow upward along the smoke deflector and escape from the second inlet to the outside of the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 An axonometric view of the range hood provided for this application;

[0019] Figure 2 A front view of the range hood provided for this application;

[0020] Figure 3 for Figure 2 A cross-sectional view of the range hood shown at AA when the smoke baffle is in the closed position;

[0021] Figure 4 for Figure 2 A cross-sectional view of the range hood shown at AA when the smoke baffle is in the open position;

[0022] Figure 5 for Figure 4 A partial schematic diagram from another perspective;

[0023] Figure 6 for Figure 4 A partial schematic diagram from another perspective.

[0024] 1. The range hood is provided with a first cover, a second cover, and a second cover. 2. The range hood is provided with a first cover, a second cover, and a second cover. 3. The range hood is provided with a first cover, a second cover, and a second cover. 4. The range hood is provided with a first cover, a second cover, and a second cover. 5. The range hood is provided with a first cover, a second cover, and a second cover. 6. The range hood is provided with a first cover, a second cover, and a second cover. 7. The range hood is provided with a first cover, a second cover, and a second cover. 8. The range hood is provided with a first cover, a second cover, and a second cover. 9. The range hood is provided with a first cover, a second cover, and a second cover. 10. The range hood is provided with a first cover, a second cover, and a second cover. 11. The range hood is provided with a first cover, a second cover, and a second cover. DETAILED DESCRIPTION

[0025] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0026] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0028] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the relevant listed items.

[0030] See also Figures 1 to 4The present application provides a range hood 100, which includes a housing 10 and a smoke shield 20. The housing 10 is provided with an air inlet 11. The smoke shield 20 is provided with a rotating shaft 30 and includes a first smoke shield portion 21 and a second smoke shield portion 22 located on either side of the rotating shaft 30. The smoke shield 20 is rotatably mounted on the air inlet 11 around the rotating shaft 30. The smoke shield 20 has a closed position and a balanced position. When the smoke shield 20 is rotated to the closed position, the air inlet 11 is closed. When the smoke shield 20 is rotated to the balanced position, the air inlet 11 is opened. The first smoke shield portion 21 is rotated toward the inside of the housing 10 relative to the air inlet 11 to be spaced apart from and enclosed by one side edge of the air inlet 11 to form a first inlet 113. The second smoke shield portion 22 is rotated toward the outside of the housing 10 relative to the air inlet 11 to be spaced apart from and enclosed by the other side edge of the air inlet 11 to form a second inlet 114. The smoke shield 20 is tilted relative to the height direction X of the range hood 100, and the height of the second smoke shield portion 22 is greater than the height of the first smoke shield portion 21. As the smoke shield 20 switches from the closed position to the balanced position, the degree of inclination of the smoke shield 20 relative to the height direction X of the range hood 100 gradually increases.

[0031] It can be understood that, compared to the related structure in which the smoke shield 20 rotates around its own side edge toward the outside of the housing 10, the range hood 100 provided in the present application rotates from the closed position to the balanced position. The first smoke shield portion 21 rotates around the rotation axis 30 toward the inside of the housing 10, while the second smoke shield portion 22 rotates around the rotation axis 30 toward the outside of the housing 10. In other words, only the second smoke shield portion 22 extends out of the air inlet 11, making the smoke shield 20 relatively small when it extends out of the air inlet 11. This helps prevent the smoke shield 20 from obstructing the user's view or interfering with cooking operations. Furthermore, along the height direction X of the range hood, as oil smoke rises from the bottom to the outer surface of the smoke shield 20, it is split into two paths along the outer surface of the smoke shield 20: one path of oil smoke enters the interior of the housing 10 through the first inlet 113, and the other path of oil smoke enters the interior of the housing 10 through the second inlet 114. In other words, the smoke shield 20 acts as a rectifier and buffer, thereby improving the oil smoke extraction effect. Furthermore, as the smoke baffle 20 switches from the closed position to the balanced position, the inclination of the smoke baffle 20 relative to the height direction X of the range hood 100 gradually increases, that is, as the smoke baffle 20 switches from the closed position to the balanced position, the slope of the smoke baffle 20 becomes smaller and becomes more gentle. This will weaken the wall-attachment diversion effect of the smoke baffle 20 on the oil smoke entering the interior of the shell 10 from the first inlet 113, making it difficult for this part of the oil smoke to flow upward along the smoke baffle 20 and escape from the second inlet 114 to the outside of the shell 10.

[0032] like Figure 3As shown, the housing 10 is provided with an air deflector 12. The air deflector 12 extends from an edge of the air inlet 11 near the second smoke shield 22 toward the exterior of the housing 10 and expands outward relative to the air inlet 11. Preferably, the air deflector 12 is arranged at an obtuse angle, such as 135 degrees, to the surface where the air inlet 11 is located. The air deflector 12 is used to guide the oil smoke into the second inlet 114. That is, the air deflector 12 can have the effect of gathering the oil smoke toward the second inlet 114.

[0033] Among them, such as Figure 4 As shown, when the smoke shield 20 is rotated to the balanced position, the second smoke shield portion 22 does not extend beyond the air guide plate 12 along the thickness direction Y of the range hood. Considering that the air guide plate 12 extends from an edge of the air inlet 11 near the second smoke shield portion 22 toward the exterior of the housing 10 and expands outward relative to the air inlet 11, it can be seen that the air guide plate 12 can also prevent oil smoke inside the housing 10 from escaping from the second inlet 114 to the exterior of the housing 10.

[0034] Furthermore, if Figure 3 and Figure 4 As shown, the housing 10 further includes an extension plate 13, which is slidably connected to the air guide plate 12 along the extension direction of the air guide plate 12. The extension plate 13 has a retracted position and an extended position. When the extension plate 13 is in the retracted position, the extension plate 13 is located on the surface of the air guide plate 12; when the extension plate 13 is in the extended position, the extension plate 13 can extend beyond the end of the air guide plate 12 away from the air inlet 11. When the extension plate 13 is in the maximum extended position, the extension plate 13 is seamlessly connected to the air guide plate 12. That is, the extension plate 13 is seamlessly spliced ​​with the air guide plate 12 along the extension direction of the air guide plate 12, thereby preventing oil smoke from escaping through the gap between the extension plate 13 and the air guide plate 12 and affecting the oil smoke extraction effect. It can be understood that when the extension plate 13 is in the extended position, the extension plate 13 can play the role of extending the air guide plate 12, thereby improving the effect of gathering oil smoke toward the second inlet 114, and can further prevent the oil smoke inside the shell 10 from escaping from the second inlet 114 to the outside of the shell 10.

[0035] See also Figures 3 to 5 The range hood further includes a connecting structure 40 that connects the second smoke barrier 22 to the extension plate 13. As the smoke barrier 20 rotates about the rotation axis 30, the second smoke barrier 22 can drive the extension plate 13 to slide relative to the air guide plate 12 via the connecting structure 40. The connecting structure 40 enables the second smoke barrier 22 to operate in conjunction with the extension plate 13, eliminating the need for a separate drive mechanism to drive the extension plate 13 to slide relative to the air guide plate 12.

[0036] Specifically, when the smoke shield 20 is in the closed position, the extension plate 13 is in the retracted position; when the smoke shield 20 is in the balanced position, the extension plate 13 is in the extended position. Thus, when the second inlet 114 is open, the extension plate 13 extends; when the second inlet 114 is closed, the extension plate 13 is hidden under the air guide plate 12.

[0037] The connecting structure 40 includes a connecting rod 41 and a slider 42. One end of the connecting rod 41 is hinged to the second smoke barrier 22, and the other end is hinged to the extension plate 13; the slider 42 is fixedly installed on the extension plate 13, and the air guide plate 12 is provided with a guide rail 131. The slider 42 is slidably connected to the guide rail 131.

[0038] A hinge seat 43 is respectively provided on the second smoke shield 22 and the extension plate 13 , and both ends of the connecting rod 41 are hinged to the corresponding two hinge seats 43 .

[0039] Furthermore, if Figure 6 As shown, the air deflector 12 has a through hole 121. A guide rail 131 is located on the side of the air deflector 12 facing away from the extension plate 13 and has a slide groove 132. The slide groove 132 communicates with the through hole 121 through its opening 133, and a stop step 134 is provided at the opening 133 of the slide groove 132. One end of the slider 42 slides within the slide groove 132 and stops at the stop step 134. The other end extends out of the through hole 121 and is fixedly connected to the extension plate 13. The stop step 134 prevents the slider 42 from escaping from the slide groove 132 through the opening 133. The hinge seat 43 and the slider 42 are respectively connected to the opposite sides of the extension plate 13.

[0040] Alternatively, as Figure 6 As shown, along the height direction X of the range hood, the extension plate 13 and the air guide plate 12 are spaced apart and enclosed to form a small assembly gap 14. In other words, the extension plate 13 and the air guide plate 12 do not contact each other, thereby avoiding frictional resistance between the extension plate 13 and the air guide plate 12.

[0041] like Figure 3 and Figure 4 As shown, the range hood 100 also includes a fan 50, which is installed inside the shell 10, the surface area of ​​the first smoke barrier 21 is larger than the surface area of ​​the second smoke barrier 22, and the center of gravity of the smoke barrier 20 is located at the first smoke barrier 21; when the smoke barrier 20 is in the closed position and the fan 50 provides suction wind force toward the inside of the shell 10, the smoke barrier 20 can rotate around the rotating shaft 30 to a balanced position and stop rotating at the balanced position to keep the air inlet 11 open. When the suction wind force disappears, the smoke barrier 20 can fall back to the closed position under the action of its own gravity.

[0042] It is understood that when the smoke barrier 20 is in the closed position and the fan 50 is providing suction force toward the interior of the housing 10, the pressure inside the smoke barrier 20 is lower than the pressure outside, resulting in both the first smoke barrier 21 and the second smoke barrier 22 being subjected to pressure directed toward the interior of the housing 10. Because the surface area of ​​the first smoke barrier 21 is larger than that of the second smoke barrier 22, the pressure F1 applied to the first smoke barrier 21 is greater than the pressure F2 applied to the second smoke barrier 22. Due to the pressure difference between the first and second smoke barriers 21, 22, the smoke barrier 20 rotates about the rotation axis 30, thereby opening the air inlet 11. Specifically, the first smoke barrier 21 rotates about the rotation axis 30 toward the interior of the housing 10, while the second smoke barrier 22 rotates about the rotation axis 30 toward the exterior of the housing 10. Until the smoke shield 20 rotates to the equilibrium position, the torques of the first smoke shield 21, the second smoke shield 22, and the weight G of the smoke shield 20 are balanced, allowing the smoke shield 20 to stop rotating at the equilibrium position and keep the air inlet 11 open. When the suction wind force disappears, the smoke shield 20 falls back to the closed position under its own weight, closing the air inlet again. In this way, the smoke shield 20 can automatically open or close the air inlet 11 by using the suction wind force provided by the fan, without the need for an additional drive device, which is relatively cost-effective.

[0043] The housing 10 includes a fan frame 101 and a smoke collecting hood 102 . The fan is installed on the fan frame 101 . The air inlet 11 is opened in the smoke collecting hood 102 . The air guide plate 12 is provided in the smoke collecting hood 102 .

[0044] Furthermore, a first limiting plate 111 and a second limiting plate 112 are respectively provided at opposite ends of the air inlet 11. When the smoke barrier 20 is in the closed position, along the range hood's height direction X, the first limiting plate 111 stops below the first smoke barrier 21, and the second limiting plate 112 stops above the second smoke barrier 22. The first limiting plate 111 limits the first smoke barrier 21, and the second limiting plate 112 limits the second smoke barrier 22, allowing the smoke barrier 20 to remain in the closed position and prevent rotation about the rotation axis 30 under its own weight. Thus, when the smoke barrier 20 is in a balanced position, a first inlet 113 is formed between the first smoke barrier 21 and the first limiting plate 111, and a second inlet 114 is formed between the second smoke barrier 22 and the second limiting plate 112.

[0045] Furthermore, if Figure 6 As shown, the second limiting plate 112 is provided with an avoidance groove 112 a , and the avoidance groove 112 a is used to avoid the connecting rod 41 to avoid interference between the second limiting plate 112 and the connecting rod 41 .

[0046] See also Figure 1 and Figure 5The shell 10 has a mating surface 15 arranged toward the first smoke barrier 21. The mating surface 15 is spaced apart from the first smoke barrier 21 and is used to enclose the first smoke barrier 21 to form a first air inlet channel 16; as the smoke barrier 20 switches between the closed position and the equilibrium position, the air inlet cross-sectional area of ​​the first air inlet channel 16 remains unchanged.

[0047] It is understandable that without the mating surface 15, when the suction force provided by the fan is increased, the first smoke shield 21 rotates further toward the interior of the fume hood 102, further increasing the opening of the first inlet 113. However, since the cross-sectional area of ​​the flow increases after the oil smoke enters the fume hood 102, the wind speed may decrease. In other words, although the suction force provided by the fan is increased, the wind speed and air flow rate at the first inlet 113 may not increase as expected due to the influence of the cross-sectional area of ​​the flow. However, by providing the mating surface 15, the cross-sectional area of ​​the air flow of the first air inlet channel 16 remains unchanged. When the suction force provided by the fan is increased, the first smoke shield 21 rotates further toward the interior of the fume hood 102, further increasing the opening of the first inlet 113. Moreover, the cross-sectional area of ​​the air flow of the first air inlet channel 16 remains unchanged. Therefore, the wind speed and air flow rate at the air inlet 11 can be increased as expected. In other words, by providing the mating surface 15, it is possible to prevent changes in the cross-sectional area from interfering with the wind speed. Furthermore, the mating surface 15 can also guide the oil smoke entering the smoke hood 102 , facilitating the oil smoke to be quickly sucked out by the fan. Specifically, the mating surface 15 is configured as an arc surface, and the mating surface 15 is parallel to the rotation trajectory of the first smoke shield 21 .

[0048] The first smoke barrier 21 is equipped with a smoke sensor 60 for detecting the oil fume concentration within the first air inlet duct 16. Furthermore, the fan is configured to increase the suction force provided by the fan when the smoke sensor 60 detects that the oil fume concentration within the first air inlet duct 16 exceeds a target value. This allows the fan's suction force to be adjusted based on the oil fume concentration within the first air inlet duct 16 detected by the smoke sensor 60, thereby aligning the range hood 100's oil fume extraction capacity with the oil fume concentration.

[0049] Furthermore, a reflective groove 151 is provided on the mating surface 15 corresponding to the smoke sensor probe 60. The extending direction of the reflective groove 151 is arranged parallel to the rotation trajectory of the smoke sensor probe 60. In this way, the smoke sensor probe 60 can detect the oil fume concentration within the reflective groove 151. It is understandable that because the flow rate of oil fume entering the fume hood 102 is relatively fast, it is easy to form turbulent flow. By providing the reflective groove 151, the reflective groove 151 can guide the oil fume, thereby making the oil fume flowing along the reflective groove 151 more stable. Therefore, the smoke sensor probe 60 can detect the oil fume concentration within the reflective groove 151 more accurately.

[0050] Furthermore, the mating surface 15 is provided with a protrusion 152, and the reflective groove 151 is formed on the protrusion 152. A notch 153 is formed at the bottom of the protrusion 152, connecting to the reflective groove 151, along the direction of gravity. The notch 153 is used to allow oil droplets to flow out of the reflective groove 151 under the action of gravity. In this way, the protrusion 152 can prevent oil droplets formed in the first air inlet channel 16 from entering the reflective groove 151. Moreover, the notch 153 allows oil droplets formed in the reflective groove 151 to be discharged under their own gravity, thereby preventing oil droplets from accumulating in the reflective groove 151 and interfering with the smoke sensor 60's detection of the oil smoke concentration in the reflective groove 151.

[0051] The range hood 100 also includes a damping rod 70 located within the housing 10. One end of the damping rod 70 is connected to the first smoke barrier 21, and the other end is connected to the inner wall of the housing 10. The damping rod 70 absorbs the impact of the smoke barrier 20 during opening and closing, thereby reducing its wobbling and maintaining stability in its equilibrium position. Specifically, one end of the damping rod 70 is hingedly connected to the first smoke barrier 21, and the other end is hingedly connected to the inner wall of the housing 10. Multiple damping rods 70 may be provided.

[0052] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of patent protection for the present application shall be determined by the appended claims.

Claims

1. A range hood, characterized in that: The range hood (100) comprises: A housing (10), wherein the housing (10) is provided with an air inlet (11); A smoke shield (20) is provided on the smoke shield (20), and the smoke shield (20) includes a first smoke shield portion (21) and a second smoke shield portion (22) respectively located on both sides of the rotation shaft (30), the smoke shield (20) is rotatably mounted on the air inlet (11) around the rotation shaft (30), and the smoke shield (20) has a closed position and a balanced position, wherein when the smoke shield (20) is rotated to the closed position, the air inlet (11) is closed; when the smoke shield (20) is rotated to the closed position, the air inlet (11) is closed; When the plate (20) rotates to the equilibrium position, the air inlet (11) is opened, and the first smoke shield (21) is turned relative to the air inlet (11) toward the inside of the shell (10) to be spaced apart from and surrounded by an edge of one side of the air inlet (11) to form a first inlet (113), and the second smoke shield (22) is turned relative to the air inlet (11) toward the outside of the shell (10) to be spaced apart from and surrounded by an edge of the other side of the air inlet (11) to form a second inlet (114); The smoke shield (20) is arranged to be inclined relative to the height direction X of the range hood (100), and the height of the second smoke shield portion (22) is greater than the height of the first smoke shield portion (21). As the smoke shield (20) switches from the closed position to the balanced position, the degree of inclination of the smoke shield (20) relative to the height direction X of the range hood (100) gradually increases.

2. The range hood according to claim 1, characterized in that: The shell (10) is provided with an air guide plate (12), which extends from a side edge of the air inlet (11) close to the second smoke shield (22) toward the outside of the shell (10) and is outwardly expanded relative to the air inlet (11). The air guide plate (12) is used to guide oil smoke into the second inlet (114).

3. The range hood according to claim 2, characterized in that: The housing (10) further comprises an extension plate (13), wherein the extension plate (13) is slidably connected to the air guide plate (12) along an extension direction of the air guide plate (12), and the extension plate (13) has a retracted position and an extended position; When the extension plate (13) is in a retracted position, the extension plate (13) is located on the surface of the air guide plate (12); when the extension plate (13) is in an extended position, the extension plate (13) can extend out of the end of the air guide plate (12) away from the air inlet (11).

4. The range hood according to claim 3, characterized in that: When the extension plate (13) is in the maximum extended position, the extension plate (13) and the wind guide plate (12) are seamlessly connected.

5. The range hood according to claim 3, characterized in that: The range hood further comprises a connecting structure (40), wherein the connecting structure (40) connects the second smoke shielding portion (22) and the extension plate (13); Wherein, as the smoke shield (20) rotates around the rotating shaft (30), the second smoke shield portion (22) can drive the extension plate (13) to slide relative to the wind guide plate (12) through the connecting structure (40).

6. The range hood according to claim 5, characterized in that: The connecting structure (40) comprises a connecting rod (41) and a sliding block (42); one end of the connecting rod (41) is hinged to the second smoke barrier (22), and the other end is hinged to the extension plate (13); The slider (42) is fixedly mounted on the extension plate (13); the wind guide plate (12) is provided with a guide rail (131); and the slider (42) is slidably connected to the guide rail (131).

7. The range hood according to claim 6, characterized in that: The air guide plate (12) is provided with a through hole (121), the guide rail (131) is located on a side of the air guide plate (12) away from the extension plate (13), and is provided with a slide groove (132), the slide groove (132) is connected to the through hole (121) through its own opening (133), and a limiting step (134) is provided at the opening (133) of the slide groove (132); One end of the slider (42) is slidably mounted in the slide groove (132) and is stopped at the limiting step (134), and the other end extends out of the through hole (121) and is fixedly connected to the extension plate (13).

8. The range hood according to claim 2, characterized in that: When the smoke shield (20) is rotated to a balanced position, the second smoke shield portion (22) is arranged so as not to extend beyond the air guide plate (12) along the thickness direction Y of the range hood.

9. The range hood according to any one of claims 1 to 8, characterized in that: The range hood further comprises a fan (50), the fan (50) being installed inside the housing (10), the surface area of ​​the first smoke barrier (21) being larger than the surface area of ​​the second smoke barrier (22), and the center of gravity of the smoke barrier (20) being located at the first smoke barrier (21); When the smoke shield (20) is in the closed position and the fan (50) provides suction wind force toward the interior of the shell (10), the smoke shield (20) can rotate around the rotating shaft (30) to a balanced position and stop rotating at the balanced position to keep the air inlet (11) open. When the suction wind force disappears, the smoke shield (20) can fall back to the closed position under the action of its own gravity.

10. The range hood according to claim 9, characterized in that: A first limiting plate (111) and a second limiting plate (112) are respectively provided at opposite ends of the air inlet (11); when the smoke shield (20) is in a closed position, along the height direction X of the range hood, the first limiting plate (111) stops below the first smoke shield (21), and the second limiting plate (112) stops above the second smoke shield (22).

Images