Range hood

Abstract

This application relates to a range hood, which includes a fan, a housing, a smoke baffle, and a rotating shaft. The housing has an air inlet, and the smoke baffle is rotatably connected to the air inlet via the rotating shaft. The portions of the smoke baffle located on either side of the rotating shaft are defined as a first smoke baffle and a second smoke baffle, respectively. The surface area of ​​the first smoke baffle is larger than that of the second smoke baffle, and the center of gravity of the smoke baffle is located in the first smoke baffle. The smoke baffle has a closed position and a balanced position. When the fan provides suction force towards the interior of the housing, the smoke baffle can rotate around the rotating shaft to the balanced position and stop rotating at the balanced position, keeping the air inlet open. When the suction force disappears, the smoke baffle can fall back to the closed position under its own gravity, closing the air inlet. The range hood provided by this application does not require a drive mechanism to drive the smoke baffle, thus reducing cost and facilitating adjustment of the air inlet opening.

Description

[0001] Related applications

[0002] This application claims priority to Chinese patent application No. 2024109359795, filed on July 12, 2024, entitled “Range Hood”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of range hood technology, and in particular to a range hood. Background Technology

[0004] Most commercially available range hoods have a smoke baffle, which is used to open or close the air inlet. Typically, a drive mechanism is installed inside the range hood, such as a motor and connecting rod. The motor drives the connecting rod to move, which in turn opens or closes the smoke baffle. This method of using a drive mechanism is costly, and the mechanism is prone to failure over time, requiring repairs and causing inconvenience to users. Furthermore, the drive mechanism can only control the opening angle of the smoke baffle, limiting it to a fixed angle and failing to adjust the air inlet according to the amount of cooking fumes, thus affecting the smoke extraction efficiency. Summary of the Invention

[0005] Therefore, it is necessary to provide a range hood that is lower in cost and allows for easy adjustment of the air inlet opening, thereby improving the smoke extraction effect.

[0006] A range hood includes a fan, a housing, a smoke baffle, and a rotating shaft. The housing has an air inlet, and the smoke baffle is rotatably mounted at the air inlet via the rotating shaft. The smoke baffle includes a first smoke-blocking part and a second smoke-blocking part located on both sides of the rotating shaft. The surface area of ​​the first smoke-blocking part is larger than that of the second smoke-blocking part, and the center of gravity of the smoke baffle is located at the first smoke-blocking part. The smoke baffle has a closed position and a balanced position. When the fan provides suction force towards the housing, the smoke baffle can rotate around the rotating shaft to the balanced position and stop rotating at the balanced position to keep the air inlet open. When the suction force disappears, the smoke baffle can fall back to the closed position under its own gravity, and the air inlet closes.

[0007] In one embodiment, as the smoke baffle moves from the closed position to the equilibrium position, the first smoke baffle moves into the housing, thereby opening the first inlet; at the same time, the second smoke baffle moves away from the housing, thereby opening the second inlet.

[0008] In one embodiment, the housing has a mating surface facing the first smoke-blocking part. This mating surface is spaced apart from and encloses the first smoke-blocking part to form a first air inlet channel. As the smoke-blocking plate switches between a closed position and a balanced position, the cross-sectional area of ​​the first air inlet channel remains constant. This arrangement avoids interference with the wind speed caused by changes in the cross-sectional area. Furthermore, the mating surface also guides the fumes entering the smoke hood, facilitating their rapid extraction and discharge by the fan.

[0009] In one embodiment, the mating surface is configured as an arc surface, and the movement trajectory of the mating surface is parallel to the side end face of the first smoke-blocking part away from the rotating shaft.

[0010] In one embodiment, the first smoke-blocking section is equipped with a smoke-sensing probe to detect the concentration of cooking fumes in the first air intake channel. Furthermore, the fan is configured to increase its suction power when the smoke-sensing probe detects that the concentration of cooking fumes in the first air intake channel exceeds a target value. It is understood that this configuration allows the fan's suction power to be adjusted based on the concentration of cooking fumes detected by the smoke-sensing probe in the first air intake channel, thereby ensuring that the range hood's fume extraction capacity matches the concentration of cooking fumes.

[0011] In one embodiment, a reflective groove is provided on the mating surface corresponding to the smoke sensor probe, and the extending direction of the reflective groove is parallel to the rotation trajectory of the smoke sensor probe. It is understood that this arrangement allows the reflective groove to guide the oil fumes, thereby making the oil fumes flowing along the reflective groove more stable. Therefore, the smoke sensor probe can more accurately detect the concentration of oil fumes within the reflective groove.

[0012] In one embodiment, a protrusion is provided on the mating surface, and a reflective groove is formed on the protrusion. Along the direction of gravity, a notch is formed at the bottom of the protrusion, communicating with the reflective groove. The notch is used to allow oil droplets to flow out of the reflective groove under their own gravity. It can be understood that with this arrangement, the protrusion can prevent oil droplets formed in the first air inlet channel from entering the reflective groove, and by forming the notch, the oil droplets formed in the reflective groove can be discharged under their own gravity.

[0013] In one embodiment, a first limiting plate and a second limiting plate are respectively provided at opposite ends of the air inlet. When the smoke baffle is in the closed position, along the direction of gravity, the first limiting plate stops below the first smoke baffle, and the second limiting plate stops above the second smoke baffle. It can be understood that with this configuration, the first limiting plate limits the first smoke baffle, and the second limiting plate limits the second smoke baffle, so that the smoke baffle can remain in the closed position and will not continue to rotate around the axis under its own gravity.

[0014] In one embodiment, one end of the first limiting plate is connected to one side edge of the air inlet, and the other end extends toward the center of the air inlet; one end of the second limiting plate is connected to the opposite side edge of the air inlet, and the other end extends toward the center of the air inlet.

[0015] In one embodiment, the range hood further includes a damping rod located inside the housing, with one end connected to the first smoke-blocking part and the other end connected to the inner wall of the housing. It is understood that by providing the damping rod, the impact during the opening and closing of the smoke-blocking plate can be absorbed, thereby reducing the swaying of the smoke-blocking plate and ensuring its stability at the equilibrium position.

[0016] In one embodiment, the housing includes a fan frame and a smoke hood connected to it, with the fan mounted on the fan frame and the air inlet opened in the smoke hood.

[0017] Compared with the prior art, the range hood provided in this application, when the smoke baffle is in the closed position, provides suction force towards the inside of the housing via a fan. The pressure inside the smoke baffle is lower than the pressure on the outside, causing both the first and second smoke baffle parts to experience pressure directed inwards. Since the surface area of ​​the first smoke baffle is larger than that of the second smoke baffle, the pressure F1 on the first smoke baffle is greater than the pressure F2 on the second smoke baffle. Under the pressure difference between the first and second smoke baffle parts, the smoke baffle rotates around its axis, thereby opening the air inlet. Specifically, the first smoke baffle rotates towards the inside of the housing, and the second smoke baffle rotates towards the outside of the housing. This continues until the smoke baffle reaches its equilibrium position. At this point, the torques of the pressure F1 on the first smoke baffle, the pressure F2 on the second smoke baffle, and the weight G of the smoke baffle itself are balanced, allowing the smoke baffle to stop rotating at the equilibrium position and keeping the air inlet open. When the suction power disappears, the baffle returns to the closed position under its own weight, closing the air inlet again. In this way, the suction power provided by the fan allows the baffle to automatically open or close the air inlet without the need for an additional drive mechanism, resulting in lower costs and reduced maintenance due to drive mechanism failures. Furthermore, it is understood that the greater the suction power provided by the fan, the greater the angle the baffle rotates from the closed position to the equilibrium position, meaning a larger opening of the air inlet. Therefore, the range hood proposed in this solution can adjust the air inlet opening to the optimal size by adjusting the suction power provided by the fan according to actual cooking fume conditions, maintaining optimal fume extraction performance at all times. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a structural schematic diagram of the range hood provided in this application;

[0020] Figure 2 A front view of the range hood provided in this application;

[0021] Figure 3 When the smoke baffle provided in this application is in the closed position Figure 2 Sectional view at AA;

[0022] Figure 4 When the smoke baffle provided in this application is in a balanced position Figure 2 Sectional view at AA;

[0023] Figure 5 A cross-sectional view of the range hood provided in this application from another perspective.

[0024] Reference numerals: 100, Range hood; 10, Housing; 101, Fan frame; 102, Smoke hood; 11, Air inlet; 111, First limiting plate; 112, Second limiting plate; 113, First inlet; 114, Second inlet; 12, Mating surface; 121, Reflective groove; 122, Protrusion; 123, Notch; 13, First air inlet channel; 14, Air guide plate; 20, Smoke baffle; 21, First smoke baffle; 22, Second smoke baffle; 30, Rotating shaft; 40, Smoke sensor; 50, Damping rod; 60, Fan. Detailed Implementation

[0025] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this 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 "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0030] Please see Figures 1 to 4This application provides a range hood 100, which includes a fan 60, a housing 10, a smoke baffle 20, and a rotating shaft 30. The housing 10 has an air inlet 11. The smoke baffle 20 is rotatably mounted on the air inlet 11 via the rotating shaft 30. The smoke baffle 20 includes a first smoke baffle portion 21 and a second smoke baffle portion 22 located on both sides of the rotating shaft 30. The surface area of ​​the first smoke baffle portion 21 is larger than the surface area of ​​the second smoke baffle portion 22, and the center of gravity of the smoke baffle 20 is located at the first smoke baffle portion 21. The smoke baffle 20 has a closed position and a balanced position. When the smoke baffle 20 is in the closed position, the air inlet 11 is closed. When the fan provides suction force toward the housing 10, the smoke baffle 20 can rotate around the rotating shaft 30 to the balanced position and stop rotating at the balanced position, so that the air inlet 11 remains open. When the suction force disappears, the smoke baffle 20 can fall back to the closed position under its own gravity.

[0031] Understandably, when the smoke baffle 20 is in the closed position, the fan provides suction force towards the interior of the housing 10. The pressure inside the smoke baffle 20 is less than the pressure on the outside, causing both the first smoke baffle 21 and the second smoke baffle 22 to experience pressure directed towards the interior of the housing 10. Since the surface area of ​​the first smoke baffle 21 is greater than that of the second smoke baffle 22, the pressure F1 on the first smoke baffle 21 is greater than the pressure F2 on the second smoke baffle 22. Under the pressure difference between the first smoke baffle 21 and the second smoke baffle 22, the smoke baffle 20 rotates around the pivot 30, thereby opening the air inlet 11. Specifically, the first smoke-blocking part 21 moves towards the interior of the housing 10 around the rotating shaft 30, thereby opening the first inlet 113. Simultaneously, the second smoke-blocking part 22 moves away from the housing 10 around the rotating shaft 30, thereby opening the second inlet 114. This continues until the smoke-blocking plate 20 rotates to its equilibrium position. At this point, the torques of the pressure F1 on the first smoke-blocking part 21, the pressure F2 on the second smoke-blocking part 22, and the weight G of the smoke-blocking plate 20 are balanced, allowing the smoke-blocking plate 20 to stop rotating at its equilibrium position and keeping the air inlet 11 open. When the suction force disappears, the smoke-blocking plate 20 falls back to the closed position under its own weight, closing the air inlet again. Thus, the suction force provided by the fan allows the smoke-blocking plate 20 to automatically open or close the air inlet 11 without the need for an additional drive device, resulting in lower costs and reduced maintenance due to device malfunctions. Furthermore, it is understandable that the greater the suction force provided by the fan, the greater the angle of rotation of the baffle 20 from the closed position to the equilibrium position, that is, the greater the opening of the air inlet 11. Therefore, the range hood 100 proposed in this solution can adjust the opening of the air inlet 11 to the optimal size by adjusting the suction force provided by the fan 60 according to the actual oil fume conditions, so as to maintain the best oil fume extraction effect at all times.

[0032] Furthermore, if Figure 3 and Figure 4 As shown, the air inlet 11 has a first limiting plate 111 and a second limiting plate 112 at opposite ends. When the smoke baffle 20 is in the closed position, along the direction of gravity, the first limiting plate 111 stops below the first smoke baffle 21, and the second limiting plate 112 stops above the second smoke baffle 22. It can be understood that the first limiting plate 111 limits the first smoke baffle 21, and the second limiting plate 112 limits the second smoke baffle 22, so that the smoke baffle 20 can remain in the closed position and will not continue to rotate around the pivot 30 under its own gravity.

[0033] Specifically, one end of the first limiting plate 111 is connected to one side edge of the air inlet 11, and the other end extends towards the center of the air inlet 11. Similarly, one end of the second limiting plate 112 is connected to the opposite side edge of the air inlet 11, and the other end extends towards the center of the air inlet 11. This increases the contact area between the first limiting plate 111 and the first smoke-blocking part 21, as well as the contact area between the second limiting plate 112 and the second smoke-blocking part 22. Simultaneously, when the smoke-blocking plate 20 is in the closed position, the second limiting plate 112, the smoke-blocking plate 20, and the first limiting plate 111 form an oil passage, allowing oil stains on the front side of the housing 10 and the inside of the smoke-blocking plate 20 to smoothly pass through the first limiting plate 111 into the oil collection device, preventing dripping onto the stove surface.

[0034] Furthermore, when the smoke baffle 20 is in the equilibrium position, a first inlet 113 is formed between the first smoke baffle 21 and the first limiting plate 111, and a second inlet 114 is formed between the second smoke baffle 22 and the second limiting plate 112. The flow area of ​​the first inlet 113 is larger than the flow area of ​​the second inlet 114. Thus, the smoke baffle 20 in the equilibrium position can distribute airflow to the air inlet 11.

[0035] like Figure 3 and Figure 4 As shown, along the thickness direction of the range hood 100, the second inlet 114 is located in front of the first inlet 113, and the vertical height of the second inlet 114 is greater than the vertical height of the first inlet 113. Thus, the range hood 100 can achieve forward airflow through the second inlet 114 and rear airflow through the first inlet 113. Furthermore, because the vertical height of the second inlet 114 is greater than the vertical height of the first inlet 113, the outer wall of the baffle plate 20 has a guiding function, facilitating the guidance of cooking fumes into the first inlet 113.

[0036] The housing 10 is provided with an air guide plate 14, which is set at an angle to the second limiting plate 112 and is used to guide the oil fumes into the second inlet 114.

[0037] Further, see Figure 4 and Figure 5 The housing 10 has a mating surface 12 facing the first smoke baffle 21 inside. The mating surface 12 is used to form a first air inlet channel 13 by being spaced apart from and surrounding the first smoke baffle 21. As the smoke baffle 20 switches between the closed position and the balanced position, the air inlet cross-sectional area of ​​the first air inlet channel 13 remains unchanged.

[0038] Understandably, without the mating surface 12, when the suction force provided by the fan 60 is increased, the first smoke baffle 21 rotates further inward toward the smoke hood 102, and the opening of the first inlet 113 further increases. However, because the cross-sectional area of ​​the flow increases after the fumes enter the smoke hood 102, the wind speed may decrease. In other words, although the suction force provided by the fan 60 is increased, the wind speed and airflow of the first inlet 113 may not increase as expected due to the influence of the cross-sectional area. By setting the mating surface 12, the cross-sectional area of ​​the first air inlet channel 13 remains unchanged. When the suction force provided by the fan 60 is increased, the first smoke baffle 21 rotates further inward toward the smoke hood 102, the opening of the first inlet 113 further increases, and the cross-sectional area of ​​the first air inlet channel 13 remains unchanged. Therefore, the wind speed and airflow of the air inlet 11 can increase as expected. In other words, by setting the mating surface 12, the change in the cross-sectional area of ​​the flow can be avoided from interfering with the wind speed. Furthermore, the mating surface 12 can also guide the oil fumes entering the fume hood 102, which is conducive to the rapid extraction and discharge of the oil fumes by the fan.

[0039] Optionally, the mating surface 12 is configured as an arc surface, and the movement trajectory of the mating surface 12 is parallel to the side end face of the first smoke-blocking part 21 away from the rotating shaft 30.

[0040] The first smoke-blocking section 21 is equipped with a smoke-sensing probe 40, such as Figure 4 As shown, the smoke sensor 40 is used to detect the concentration of cooking fumes in the first air intake channel 13; and the fan is configured to increase the suction power provided by the fan when the smoke sensor 40 detects that the concentration of cooking fumes in the first air intake channel 13 is greater than a target value. In this way, the suction power of the fan 60 can be adjusted according to the concentration of cooking fumes detected by the smoke sensor 40 in the first air intake channel 13, thereby ensuring that the fume extraction capacity of the range hood 100 matches the concentration of cooking fumes.

[0041] Specifically, the smoke sensor 40 is detachably mounted on the end face of the first smoke-blocking part 21 away from the rotating shaft 30 and is positioned towards the first air inlet channel 13.

[0042] Further, please refer to Figure 1 , Figure 4 and Figure 5A reflective groove 121 is provided on the mating surface 12 corresponding to the smoke sensor 40. The extending direction of the reflective groove 121 is parallel to the rotation trajectory of the smoke sensor 40. In this way, the smoke sensor 40 can detect the concentration of oil fumes within the reflective groove 121. It can be understood that because the flow rate of oil fumes entering the fume hood 102 is relatively fast, turbulence is easily formed. By setting the reflective groove 121, the reflective groove 121 can guide the oil fumes, thereby making the oil fumes flowing along the reflective groove 121 more stable. Therefore, the smoke sensor 40 can more accurately detect the concentration of oil fumes within the reflective groove 121.

[0043] Furthermore, if Figure 5 A protrusion 122 is provided on the mating surface 12, protruding from the mating surface 12, and a reflective groove 121 is formed in the protrusion 122. Along the direction of gravity, a notch 123 is formed at the bottom of the protrusion 122, which communicates with the reflective groove 121. The notch 123 is used to allow oil droplets to flow out of the reflective groove 121 under their own gravity. The protrusion 122 can prevent oil droplets formed in the first air inlet channel 13 from entering the reflective groove 121. Furthermore, by providing the notch 123, the oil droplets formed in the reflective groove 121 can be discharged under their own gravity, thereby preventing oil droplets from accumulating in the reflective groove 121 and interfering with the smoke sensor 40's detection of the oil fume concentration in the reflective groove 121.

[0044] Of course, in other embodiments, the reflective groove 121 may also be formed on the mating surface 12 and recessed relative to the mating surface 12.

[0045] Please see Figures 3 to 5 The range hood 100 also includes a damping rod 50, which is located inside the housing 10. One end of the damping rod 50 is connected to the first smoke-blocking part 21, and the other end is connected to the inner wall of the housing 10. By setting the damping rod 50, the impact of the smoke-blocking plate 20 during the opening and closing process can be absorbed, thereby reducing the shaking of the smoke-blocking plate 20 and keeping the smoke-blocking plate 20 stable at the equilibrium position.

[0046] It should be noted that the damping rod 50 is a common mechanical device with wide applications in engineering and daily life. The principle of the damping rod is based on the physical effect of damping, which reduces the vibration amplitude by consuming vibration energy, thereby playing a role in shock absorption and stabilization. The damping rod 50 includes a damping device and a connecting rod. The damping device can adopt different forms such as liquid damping, gas damping, or friction damping. The specific structure of the damping rod 50 will not be described in detail here.

[0047] Among them, such as Figure 3 As shown, one end of the damping rod 50 is hinged to the first smoke baffle 21, and the other end is hinged to the inner wall of the housing 10.

[0048] Optionally, the number of damping rods 50 can also be configured to be multiple, with the multiple damping rods 50 distributed at intervals along the width direction of the first smoke-blocking part 21.

[0049] like Figure 1 As shown, the housing 10 includes a fan frame 101 and a smoke hood 102 connected to each other, the fan 60 is mounted on the fan frame 101, and the air inlet 11 is opened in the smoke hood 102.

[0050] Optionally, the first limiting plate 111 and the second limiting plate 112 are integrally bent and formed with the smoke hood 102.

[0051] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0052] The embodiments described above are merely illustrative of several implementation methods of this application, and 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 those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A range hood, characterized in that, The range hood includes a fan (60), a housing (10), a smoke baffle (20), and a rotating shaft (30). The housing (10) has an air inlet (11). The smoke baffle (20) is rotatably mounted on the air inlet (11) via the rotating shaft (30). The smoke baffle (20) includes a first smoke baffle (21) and a second smoke baffle (22) located on both sides of the rotating shaft (30). The surface area of ​​the first smoke baffle (21) is larger than the surface area of ​​the second smoke baffle (22), and the center of gravity of the smoke baffle (20) is located in the first smoke baffle (21). The smoke baffle (20) has a closed position and a balanced position. When the fan (60) provides suction force toward the interior of the housing (10), the smoke baffle (20) can rotate around the pivot (30) to the equilibrium position and stop rotating at the equilibrium position so that the air inlet (11) remains open. When the suction force disappears, the smoke baffle (20) can fall back to the closed position under its own gravity and the air inlet (11) closes. During the process of the smoke baffle (20) moving from the closed position to the equilibrium position, the first smoke baffle (21) moves into the housing (10), thereby opening the first inlet (113); at the same time, the second smoke baffle (22) moves away from the housing (10), thereby opening the second inlet (114). The housing (10) has a mating surface (12) facing the first smoke baffle (21) inside. The mating surface (12) is used to form a first air inlet channel (13) by being spaced apart from the first smoke baffle (21). As the smoke baffle (20) switches between the closed position and the balanced position, the air inlet cross-sectional area of ​​the first air inlet channel (13) remains unchanged.

2. The range hood according to claim 1, characterized in that, The mating surface (12) is configured as an arc surface, and the mating surface (12) is parallel to the movement trajectory of the side end face of the first smoke-blocking part (21) away from the rotating shaft (30).

3. The range hood according to claim 2, characterized in that, The first smoke-blocking part (21) is equipped with a smoke-sensing probe (40), which is used to detect the concentration of oil fumes in the first air intake channel (13); Furthermore, the fan (60) is configured to increase the suction force provided by the fan (60) when the smoke sensor (40) detects that the oil fume concentration in the first air intake channel (13) is greater than the target value.

4. The range hood according to claim 3, characterized in that, The mating surface (12) is provided with a reflective groove (121) corresponding to the smoke sensor probe (40), and the extension direction of the reflective groove (121) is set parallel to the rotation trajectory of the smoke sensor probe (40).

5. The range hood according to claim 4, characterized in that, The mating surface (12) is provided with a protrusion (122), and the reflective groove (121) is formed on the protrusion (122). Along the direction of gravity, the bottom of the protrusion (122) is provided with a notch (123) that connects to the reflective groove (121), and the notch (123) is used to allow oil droplets to flow out from the reflective groove (121) under their own gravity.

6. The range hood according to claim 1, characterized in that, The air inlet (11) is provided with a first limiting plate (111) and a second limiting plate (112) at opposite ends. When the smoke baffle (20) is in the closed position, along the direction of gravity, the first limiting plate (111) stops below the first smoke baffle (21), and the second limiting plate (112) stops above the second smoke baffle (22).

7. The range hood according to claim 6, characterized in that, One end of the first limiting plate (111) is connected to one side edge of the air inlet (11), and the other end extends toward the middle of the air inlet (11); One end of the second limiting plate (112) is connected to the opposite edge of the air inlet (11), and the other end extends toward the center of the air inlet (11).

8. The range hood according to claim 1, characterized in that, The range hood also includes a damping rod (50), which is located inside the housing (10), with one end of the damping rod (50) connected to the first smoke-blocking part (21) and the other end connected to the inner wall of the housing (10).

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