A range hood

Abstract

The application discloses an oil fume extractor, which comprises a shell, and an air inlet is arranged on the front side of the shell; the oil fume extractor further comprises a smoke baffle for manually opening and closing the air inlet, and a rotating shaft assembly for rotatably connecting the smoke baffle and the shell; the rotating shaft assembly comprises a guide rail plate, a rotating connecting plate and a supporting plate, the guide rail plate and the supporting plate are fixed in the shell, the rotating connecting plate is partially located between the guide rail plate and the supporting plate, the rotating connecting plate is rotatably connected with the guide rail plate and fixed with the smoke baffle, the supporting plate is provided with a sliding block capable of locking or unlocking the rotating connecting plate, and the sliding block keeps a tendency of passing through the supporting plate and facing the guide rail plate. Compared with the prior art, the oil fume extractor has the advantages that: by arranging the manually-operated smoke baffle and the rotating shaft assembly for providing rotating support for the opening and closing of the smoke baffle, the manual operation can not only improve the use experience of users who like mechanical feeling, but also reduce the product maintenance rate and cost, and meanwhile, the appearance consistency of the whole machine can be ensured.

Description

Technical Field

[0001] This invention relates to an oil fume purification device, and more particularly to an oil fume extractor. Background Technology

[0002] Range hoods have become an indispensable kitchen appliance in modern homes. Generally, range hoods include top-mounted and side-mounted types. Side-mounted range hoods utilize the principle of vortex air pressure to absorb most of the cooking fumes close to the stove in an arc, reducing adverse health effects. Furthermore, since the power source is closer to the stove, it doesn't significantly reduce the suction efficiency.

[0003] To achieve better smoke collection, a smoke baffle is usually installed at the air inlet of a side-suction range hood. Its shaft is locked with screws and is always in the open state. This method firstly affects the appearance of the whole machine, as the smoke baffle always occupies a part of the space. Secondly, the fact that the smoke baffle cannot be closed creates a channel between the range hood and the outside, which can lead to problems such as heat loss and odor intrusion.

[0004] Another approach is to use a flip-up smoke baffle. The baffle opens when the range hood is running and closes when the hood is turned off. Commonly used drive mechanisms for smoke baffles are electric push rods or motors, which are triggered by a button to automatically open or close the baffle. Examples include those disclosed in Chinese patents with application numbers 202220032380.7 and 202110661318.4. This method of automatically opening and closing the smoke baffle using a motor-driven mechanism is structurally complex and involves electronic control, resulting in higher overall product costs. It also increases the product's repair rate; according to statistics, push rod repairs account for 15% of total repairs. Furthermore, European and American users prefer a more mechanical feel, and products with motor-driven automatic smoke baffles offer a poorer user experience. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to address the shortcomings of the existing technology by providing a range hood.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: a range hood, comprising a housing, wherein an air inlet is provided on the front side of the housing; characterized in that:

[0007] The range hood also includes a smoke baffle that can be manually opened and closed at the air inlet, and a rotating shaft assembly that rotatably connects the smoke baffle and the housing. The rotating shaft assembly includes a guide rail plate, a rotating connecting plate, and a support plate. The guide rail plate and the support plate are fixed inside the housing. The rotating connecting plate is located between the guide rail plate and the support plate. The rotating connecting plate is rotatably connected to the guide rail plate and fixed to the smoke baffle. The support plate is provided with a slider that can be locked or unlocked with the rotating connecting plate. The slider tends to pass through the support plate and move towards the guide rail plate.

[0008] By setting a manually operated smoke baffle and a rotating shaft assembly that rotatably connects the smoke baffle and the housing, the rotating shaft assembly provides rotational support for opening and closing the smoke baffle. Manual operation not only enhances the user experience for users who prefer a mechanical feel, but also reduces product maintenance rate and costs, while ensuring the consistency of the overall appearance.

[0009] Furthermore, the support plate has a first support portion and a second support portion arranged at an angle. The first support portion and the guide rail plate are arranged side by side. The second support portion is provided with a slot, and the slider is inserted into the slot. The part of the first support portion corresponding to the slot is provided with a through hole for the slider to pass through, which facilitates the setting of the slider and avoids the overall thickness of the support plate being too large.

[0010] Furthermore, to maintain the movement trend of the slider, the rotating shaft assembly also includes an elastic element disposed between the slider and the wall of the slot away from the first support, thereby keeping the slider tending to pass through the through hole.

[0011] Furthermore, the first support portion is provided with a boss on the side facing the guide rail plate, thereby allowing a certain distance between the first support portion and the guide rail plate, ensuring that the rotating connecting plate can rotate freely between the support plate and the guide rail plate.

[0012] Furthermore, the rotation center of the rotating connecting plate is O. With the rotation center O as the center, the rotating connecting plate has a first positioning hole and a second positioning hole on the same circumference. The first positioning hole is the closed position hole of the smoke baffle, and the second positioning hole is the open position hole of the smoke baffle. The bottom surface of the slider facing the rotating connecting plate has a positioning reminder point and a position locking area that cooperate with the first positioning hole and the second positioning hole, so that the smoke baffle can be locked when it is opened and closed.

[0013] Furthermore, the bottom surface of the slider facing the rotating connecting plate is divided into a smoke baffle closing buffer zone and a smoke baffle opening buffer zone from bottom to top. The positioning reminder point and position locking area are located between the smoke baffle closing buffer zone and the smoke baffle opening buffer zone. The rotating connecting plate is also provided with a first contact buffer zone adjacent to the first positioning hole and a second contact buffer zone adjacent to the second positioning hole. The first contact buffer zone contacts the smoke baffle closing buffer zone when closed, and the second contact buffer zone contacts the smoke baffle opening buffer zone when open. This provides a gain buffer function when the smoke baffle is opened and closed, further improving the user experience.

[0014] Furthermore, the smoke baffle closing buffer and the smoke baffle opening buffer are inclined planes. The smoke baffle closing buffer gradually tilts from bottom to top towards the rotating connecting plate, and the smoke baffle opening buffer gradually tilts from bottom to top away from the rotating connecting plate. Different resistance changes can be obtained by adjusting the angle of the inclined plane, giving users different force experiences.

[0015] Preferably, the arrival reminder point and the location locking area are spherical.

[0016] Furthermore, the rotating shaft assembly also includes a fixing plate fixed inside the housing. The fixing plate is located on the side of the guide rail plate away from the support plate. The fixing plate has a first guide groove, and the guide rail plate has a second guide groove. The rotating connecting plate is provided with a pin that mates with the first and second guide grooves. The rotating connecting plate can drive the pin to rotate within each guide groove. The engagement of the pin and the guide groove prevents the rotating connecting plate from swaying left and right, ensuring rotational stability, and the guide grooves also serve as a limiting mechanism.

[0017] Furthermore, the smoke baffle is provided with a handle, which provides a point of leverage for manually opening or closing the smoke baffle.

[0018] Compared with the prior art, the advantages of the present invention are as follows: by setting a manually operated smoke baffle and a rotating shaft assembly that rotatably connects the smoke baffle and the housing, the rotating shaft assembly provides rotational support for the opening and closing of the smoke baffle. Manual operation not only improves the user experience for users who like the feel of machinery, but also reduces product maintenance rate and cost, and ensures the consistency of the overall appearance; by setting a buffer zone, a gain buffer function is provided when the smoke baffle is opened and closed, and a positioning reminder function is provided by a sudden change in force and a "click" sound when the smoke baffle rotates to the closed or working position. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the range hood in the open state according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the range hood in the open state according to an embodiment of the present invention (and...). Figure 1 (Different perspectives);

[0021] Figure 3 This is a schematic diagram of the hidden portion of the housing of the range hood in the open state according to an embodiment of the present invention;

[0022] Figure 4 This is a partial cross-sectional view of the range hood in the open state according to an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the rotating shaft assembly of a range hood according to an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the rotating shaft assembly of the range hood according to an embodiment of the present invention (and...). Figure 5 (Different perspectives);

[0025] Figure 7 This is a top view of the rotating shaft assembly of the range hood according to an embodiment of the present invention;

[0026] Figure 8 This is an exploded structural diagram of the rotating shaft assembly of the range hood according to an embodiment of the present invention;

[0027] Figure 9 This is an exploded structural diagram of the rotating shaft assembly of the range hood according to an embodiment of the present invention (and...). Figure 8 (Different perspectives);

[0028] Figure 10 This is a schematic diagram of the slider of the rotating shaft assembly of the range hood according to an embodiment of the present invention;

[0029] Figure 11 This is a schematic diagram of the rotating connecting plate of the rotating shaft assembly of the range hood according to an embodiment of the present invention;

[0030] Figure 12 This is a schematic diagram of the rotating connecting plate of the rotating shaft assembly of the range hood according to an embodiment of the present invention (and...). Figure 11 (Different perspectives);

[0031] Figure 13 This is a schematic diagram showing the cooperation between the rotating connecting plate and the slider of the rotating shaft assembly of the range hood according to an embodiment of the present invention;

[0032] Figure 14 This is a partial cross-sectional view of the range hood in an embodiment of the present invention, showing the intermediate state between the open and closed states.

[0033] Figure 15 This is a partial cross-sectional view of the range hood in the off state according to an embodiment of the present invention;

[0034] Figure 16 This is a schematic diagram of the force exerted when the smoke baffle of the range hood is closed according to an embodiment of the present invention;

[0035] Figure 17 and Figure 18 This is a schematic diagram showing the force change when the smoke baffle of the range hood rotates into position according to an embodiment of the present invention. Detailed Implementation

[0036] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0037] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Since the embodiments disclosed in this invention can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0038] See Figures 1-4 A range hood, specifically a side-draft range hood, includes a housing 1 and a fan 2, the fan 2 being partially or entirely housed within the housing 1. A panel 5 is located on the front side of the housing 1, with an air inlet 51 on the panel 5. A smoke baffle 3 is located at the air inlet 51, and the smoke baffle 3 can rotate relative to the housing 1 to open and close the air inlet 51. The range hood also includes an oil guide plate 6, located on the front side of the fan 2, and having a portion extending to the upper edge of the air inlet 51.

[0039] The smoke baffle 3 of the present invention is manually operated. To facilitate manual operation of the smoke baffle 3, a handle 31 can be provided on the smoke baffle 3. In the closed state, the handle 31 is located on the side of the smoke baffle 3 facing the outside of the housing 1, and is used as the force point for manually opening or closing the smoke baffle 3.

[0040] The range hood also includes two sets of rotating shaft assemblies 4, which are respectively set on the left and right sides of the smoke baffle 3, thereby connecting the smoke baffle 3 and the housing 1. The rotating shaft assembly 4 provides three main functions for the smoke baffle 3: rotational support, gain buffering when closed and open, and indication of the closed and open positions. The left and right sets of rotating shaft assemblies 4 have a symmetrical structure. The following description details the structure of the left set of rotating shaft assemblies 4 as an example.

[0041] See Figures 5-10The rotating shaft assembly 4 includes a fixed plate 41, a guide rail plate 42, a rotating connecting plate 43, a support plate 44, a slider 45, and an elastic element 46. The fixed plate 41 is fixed inside the housing 1 by screws, such as to the oil guide plate 6. The guide rail plate 42 is welded to the fixed plate 41 and fixed thereto, and the two are arranged side by side. The fixed plate 41 has an arc-shaped first guide groove 411, and the guide rail plate 42 has an arc-shaped second guide groove 421. At least one of the guide grooves is a through groove, penetrating the plate along the thickness direction of the corresponding plate. In this embodiment, both guide grooves are through grooves.

[0042] A rotating connector 43 is located on the side of the guide rail plate 42 away from the fixed plate 41. It can be movably riveted to the guide rail plate 42, allowing the rotating connector 43 to rotate around the riveted joint, closely adhering to the guide rail plate 42. The axis of rotation extends in the left-right direction. A pin 47 is provided on the rotating connector 43, passing through guide grooves on the guide rail plate 42 and the fixed plate 41. Therefore, when the rotating connector 43 rotates relative to the guide rail plate 42, it drives the pin 47 to rotate within each guide groove. The cooperation between the pin 47 and the guide grooves prevents the rotating connector 43 from swaying left and right, ensuring rotational stability, and the guide grooves also serve as limiters. The end of the rotating connector 42 away from the guide rail plate 42 can be connected and fixed to the smoke baffle 3 with screws, so when the rotating connector 43 rotates, it drives the smoke baffle 3 to rotate as well.

[0043] The rotation center of the rotating connecting plate 43 (the center of the riveting point with the guide rail plate 42) is O. A first positioning hole 431 and a second positioning hole 432 are formed on the same circumference with this rotation center O as the center. The first positioning hole 431 is the closed position hole for the smoke baffle 3, and the second positioning hole 432 is the open position hole for the smoke baffle 3. The rotating connecting plate 43 also has a first contact buffer zone 433 adjacent to the first positioning hole 431 and a second contact buffer zone 434 adjacent to the second positioning hole 432. The first contact buffer zone 433 corresponds to the closed buffer, and the second contact buffer zone 434 corresponds to the open buffer. The extension lines of the profiles of the first contact buffer zone 433 and the second contact buffer zone 434 intersect at the rotation center O.

[0044] The support plate 44 has a first support portion 441 and a second support portion 442 arranged at an angle, preferably L-shaped. The first support portion 441, the guide rail plate 42, and the fixing plate 41 can extend in the same direction, which in this embodiment is vertical. The second support portion 442 extends away from the bottom of the first support portion 441. The support plate 44 is fixed to the guide rail plate 42, and the rotating connecting plate 43 is located between the support plate 44 and the guide rail plate 42. The first support portion 441 can be fixed to the guide rail plate 42 with two screws, and the second support portion 442 can be fixed to the oil guide plate 6 with one screw. A boss 443 is provided on the side of the first support portion 441 facing the guide rail plate 42, so that there is a certain gap between the first support portion 441 and the guide rail plate 42, ensuring that the rotating connecting plate 43 can rotate freely between the support plate 44 and the guide rail plate 42. Optionally, there can be three bosses 443.

[0045] The second support portion 442 is provided with a slot 444, into which the slider 45 and the elastic member 46 can be inserted. The portion of the first support portion 441 corresponding to the slot 444 has a through hole 445, through which part of the slider 45 can pass. The elastic member 46 is disposed between the slider 45 and the wall of the slot 444 away from the first support portion 441. The elastic member 46 is preferably a spring, which keeps the slider 45 tending to pass through the through hole 445. The rotating connecting member 43 can cooperate with the slider 45. When the rotating connecting member 43 rotates to the slider 45, it applies a compressive force to the slider 45. Under the action of the force, the slider 45 moves along the slot 444, away from or towards the guide plate 42.

[0046] The slider 45 is basically arc-shaped, that is, as shown in 8, it is a backward-convex arc, as... Figure 10 As shown, the arc is convex downwards, and its center coincides with the rotation center O of the rotating connecting plate 43 (located on the same horizontal line). The bottom surface of the slider 45 facing the rotating connecting plate 43 is divided into three areas, from bottom to top: smoke baffle closing buffer zone A1 (… Figure 10 The grid lines in the middle section are only for clearly indicating the area range and do not exist in the actual structure), the positioning reminder point and the position locking area A3, and the smoke baffle opening buffer zone A2 ( Figure 10The diagonal lines in the middle section are only for clearly indicating the area and are not actually present in the structure. The central positioning indicator and locking area A3 are preferably spherical. The smoke baffle closing buffer zone A1 can extend to near the lower end of the slider 45, and the smoke baffle opening buffer zone A2 can extend to near the upper end of the slider 45. Both the smoke baffle closing buffer zone A1 and the smoke baffle opening buffer zone A2 are inclined surfaces. The smoke baffle closing buffer zone A1 gradually slopes upwards towards the rotating connecting plate 43, while the smoke baffle opening buffer zone A2 gradually slopes upwards away from the rotating connecting plate 43. This is to achieve a gain buffer.

[0047] The working principle of the range hood of the present invention is as follows:

[0048] When the smoke baffle 3 is closed, under the action of gravity and the pushing force of the person, the smoke baffle 3 drives the rotating connecting plate 43 to rotate counterclockwise. See Figure 14 and Figure 15 Arrow 14 indicates the rotation direction of the rotating connector 43. When the smoke baffle 3 rotates to the point where the first contact buffer zone 433 of the rotating connector 43 contacts the smoke baffle closing buffer zone A1 of the slider 45, the smoke baffle 3 begins to decelerate and buffer under the elastic force of the elastic element 46 to prevent the smoke baffle 3 from impacting the metal frame of the panel 5. When the positioning reminder point and the position locking area A3 are engaged in the first positioning hole 431, the smoke baffle 3 closes in place accompanied by a "click" sound, and the smoke baffle 3 is locked in the current position under the elastic force of the elastic element 46. Figure 15 As shown.

[0049] In the above process, see Figure 13 and Figure 16 The weight and thrust of the smoke baffle 3 overcome the frictional force Fu applied by the elastic element 46. As the rotation angle changes, the resistance Fu increases linearly, as shown in the following formula:

[0050] Ft=k*Δx

[0051]

[0052]

[0053] Where Ft is the elastic force of the elastic element 46, K is the elastic coefficient of the elastic element 46, θ is the angle between the smoke baffle closing buffer zone A1 of the slider 45 and the rotation plane, μ is the friction coefficient between the rotating connecting plate 43 and the guide rail plate 42, and R is the circumference radius of each positioning hole of the rotating connecting plate 43. The rotation angle of the rotating connecting plate 43 from the moment it begins to contact the smoke baffle and close the buffer zone A1.

[0054] This design also serves to remind users that the smoke baffle 3 is about to close completely, and the closing speed needs to be slowed down to ensure a comfortable smoke baffle closing experience. When the smoke baffle 3 is in the closed state, opening the smoke baffle 3 requires the user to manually apply pulling force to pull the first positioning hole 431 out of the slider 45 to the positioning reminder point and position locking area A3.

[0055] When the smoke baffle 3 is opened, it drives the rotating connecting plate 43 to rotate counterclockwise (clockwise) under the pulling force of the user. When the second contact buffer zone 434 of the rotating connecting plate 43 contacts the smoke baffle opening buffer zone A2 of the slider 45, the rotational resistance of the smoke baffle 3 begins to increase, reminding the user that the smoke baffle 3 is about to be in position, and using the gain buffering effect to prevent the user from damaging the rotating shaft assembly by applying excessive force. When the buffering reaches the position reminder point of the slider 45 and the position locking area A3 is engaged with the second positioning hole 432, the smoke baffle 43 opens to the position, and under the elastic force of the elastic element 46, the smoke baffle 3 is locked in the current working position. The tilt angles of the smoke baffle closing buffer zone A1 and the smoke baffle opening buffer zone A2 of the slider 45 are not the same, so the resistance change with the rotation angle when the smoke baffle 3 is closed and opened is also different. It can be adjusted according to the actual user needs.

[0056] In this invention, by setting buffer zones on the slider 45 and the rotating connecting plate 43, the elastic force of the elastic element 46 is converted into frictional force between the rotating connecting plate 43 and the guide rail plate 43 and the slider 45. The frictional force is sinusoidal with the rotation angle. Its main function is to provide a buffer before the smoke baffle 3 is about to reach the working position or the closed position. First, it reminds the smoke baffle 3 that it is about to be in place. Second, it can protect the smoke baffle 3 from impact.

[0057] Furthermore, when the smoke baffle 3 rotates to the closed or open (working) position, a sudden change in force (the elastic force of the elastic element 46 abruptly changes from resistance to driving force) and a "click" sound provide a positioning reminder function. That is, when the lowest point of the ball contacts the rotating connecting plate 43, the elastic force Ft is at its maximum, so the frictional force Fu also reaches its maximum. See [reference needed]. Figure 17 Under the continuous pushing force of the person, the ball enters the hole on the rotating connecting plate 43. At this time, the elastic force of the elastic element 46 is converted into the force Fd that pushes the rotating connecting plate 43. Under the action of Fd, the ball enters the hole completely. At this time, no additional pushing force from the person is required. The movement stops and the smoke baffle 3 opens or closes in place.

Claims

1. A range hood, comprising a housing (1), wherein an air inlet (51) is provided on the front side of the housing (1); characterized in that: The range hood also includes a smoke baffle (3) for manually opening and closing the air inlet (51) and a rotating shaft assembly (4) for rotatably connecting the smoke baffle (3) and the housing (1); the rotating shaft assembly (4) includes a guide rail plate (42), a rotating connecting plate (43) and a support plate (44), the guide rail plate (42) and the support plate (44) are fixed inside the housing (1), the rotating connecting plate (43) is partially located between the guide rail plate (42) and the support plate (44), the rotating connecting plate (43) is rotatably connected to the guide rail plate (42) and fixed to the smoke baffle (3), and the support plate (44) is provided with a slider (45) that can be locked or unlocked with the rotating connecting plate (43), the slider (45) tends to pass through the support plate (44) and move towards the guide rail plate (42).

2. The range hood according to claim 1, characterized in that: The support plate (44) has a first support part (441) and a second support part (442) arranged at an angle. The first support part (441) and the guide plate (42) are arranged side by side. The second support part (442) is provided with a slot (444). The slider (45) is inserted into the slot (444). The part of the first support part (441) corresponding to the slot (444) is provided with a through hole (445) for the slider (45) to pass through.

3. The range hood according to claim 2, characterized in that: The rotating shaft assembly (4) also includes an elastic element (46) disposed between the slider (45) and the wall of the slot (444) away from the first support (441), thereby causing the slider (45) to maintain the tendency to pass through the through hole (445).

4. The range hood according to claim 2, characterized in that: The first support (441) has a boss (443) on the side facing the guide rail plate (42).

5. The range hood according to claim 1, characterized in that: The rotation center of the rotating connecting plate (43) is O. With the rotation center O as the center, the rotating connecting plate (43) has a first positioning hole (431) and a second positioning hole (432) on the same circumference. The first positioning hole (431) is the closed position hole of the smoke baffle (3), and the second positioning hole (432) is the open position hole of the smoke baffle (3). The slider (45) has a positioning reminder point and a position locking area (A3) on the bottom surface of the rotating connecting plate (43) that cooperate with the first positioning hole (431) and the second positioning hole (432).

6. The range hood according to claim 5, characterized in that: The bottom surface of the slider (45) facing the rotating connecting plate (43) is divided into a smoke baffle closing buffer zone (A1) and a smoke baffle opening buffer zone (A2) from bottom to top. The positioning reminder point and position locking area (A3) is located between the smoke baffle closing buffer zone (A1) and the smoke baffle opening buffer zone (A2). The rotating connecting plate (43) is also provided with a first contact buffer zone (433) adjacent to the first positioning hole (431) and a second contact buffer zone (434) adjacent to the second positioning hole (432). The first contact buffer zone (433) contacts the smoke baffle closing buffer zone (A1) when closed, and the second contact buffer zone (434) contacts the smoke baffle opening buffer zone (A2) when open.

7. The range hood according to claim 6, characterized in that: The smoke baffle closing buffer zone (A1) and the smoke baffle opening buffer zone (A2) are inclined planes. The smoke baffle closing buffer zone (A1) gradually tilts from bottom to top towards the rotating connecting plate (43), and the smoke baffle opening buffer zone (A2) gradually tilts from bottom to top away from the rotating connecting plate (43).

8. The range hood according to claim 5, characterized in that: The arrival reminder point and location locking area (A3) are spherical.

9. The range hood according to claim 1, characterized in that: The rotating shaft assembly (4) also includes a fixing plate (41) fixed inside the housing (1). The fixing plate (41) is located on the side of the guide rail plate (42) away from the support plate (44). The fixing plate (41) has a first guide groove (411) and the guide rail plate (42) has a second guide groove (421). The rotating connecting plate (43) is provided with a pin (47) that cooperates with the first guide groove (411) and the second guide groove (421).

10. The range hood according to claim 1, characterized in that: The smoke baffle (3) is provided with a handle (31).

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