Range hood

Abstract

The range hood comprises a shell, and an air inlet is formed in the front side of the shell; the range hood further comprises a smoke barrier for manually opening and closing the air inlet and a rotating shaft assembly for rotationally connecting the smoke barrier with 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 rotationally connected with the guide rail plate and fixed to the smoke barrier, and a sliding block capable of being locked or unlocked with the rotating connecting plate is arranged on the supporting plate. The sliding block keeps the trend of penetrating through the supporting plate and facing one side of the guide rail plate. Compared with the prior art, the range hood has the advantages that by arranging the smoke barrier which is manually operated and the rotating shaft assembly which provides rotating support for opening and closing of the smoke barrier, 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 can also ensure the appearance consistency of the whole range hood.

Description

Technical Field

[0001] The invention relates to an oil fume purification device, in particular to a range hood. Background Art

[0002] Range hoods have become one of the indispensable kitchen appliances in modern families. Usually, range hoods include top suction type and side suction type. Side suction range hoods use the principle of vortex wind pressure to absorb most of the oil smoke close to the stove in an arc form, which can reduce the adverse effects on human health. In addition, the power source is close to the stove, which basically does not reduce the suction effect of the power source.

[0003] In order to achieve a better smoke-collecting effect, a smoke baffle is usually installed at the air inlet of the side-suction range hood. The rotating shaft is locked with screws and is always in an open state. This method firstly affects the appearance of the whole machine. The smoke baffle is often open and will always occupy a part of the space. Secondly, the smoke baffle cannot be closed, forming a passage between the range hood and the outside. This passage will cause temperature loss, odor intrusion and other problems.

[0004] Another way is to set a reversible smoke damper. When the range hood is working, the smoke damper is opened, and when the range hood is turned off, the smoke damper is closed. The commonly used driving mechanism of the smoke damper is an electric push rod or a motor. The movement of the motor drive mechanism is triggered by a button to automatically open or close the smoke damper. As disclosed in Chinese patents with application numbers 202220032380.7 and 202110661318.4. This method of using a motor drive mechanism to automatically open or close the smoke damper is complex in structure and involves electronic control. The overall cost of the product is higher, and the product maintenance rate will also increase. According to statistics, the push rod maintenance rate accounts for 15% of the total maintenance rate; in addition, European and American users prefer the mechanical feel, and the product experience of the motor drive mechanism automatically opening or closing the smoke damper is poor. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a range hood in view of the deficiencies in the above-mentioned prior art.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: a range hood, comprising a shell, wherein an air inlet is provided on the front side of the shell; the characteristics are:

[0007] The range hood also includes 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 includes a guide plate, a rotating connecting plate and a support plate, the guide plate and the support plate are fixed in the shell, the rotating connecting plate is partially located between the guide plate and the support plate, the rotating connecting plate is rotatably connected to the guide plate and fixed to the smoke baffle, and a slider that can be locked or unlocked with the rotating connecting plate is provided on the support plate, and the slider maintains a tendency to pass through the support plate toward one side of the guide plate.

[0008] By providing a manually operated smoke shield and a shaft assembly that rotatably connects the smoke shield and the shell, the shaft assembly provides rotational support for the opening and closing of the smoke shield. Manual operation can not only enhance the user experience of users who like a mechanical feel, but also reduce the product maintenance rate and cost, while ensuring the consistency of the overall appearance of the machine.

[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, the slider is inserted into the slot, and the portion of the first support portion corresponding to the slot is provided with a through hole for the slider to pass through, thereby facilitating the setting of the slider and avoiding the overall thickness of the support plate being too large.

[0010] Furthermore, in order to maintain the movement tendency of the slider, the shaft assembly further comprises an elastic member, which is arranged between the slider and the wall of the slot away from the first support portion, so that the slider maintains the tendency to pass through the through hole.

[0011] Furthermore, a boss is provided on one side of the first support portion facing the guide rail plate, so that a certain distance can be provided between the first support portion and the guide rail plate, thereby 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, and with the rotation center O as the center of the circle, the rotating connecting plate is provided with a first positioning hole and a second positioning hole on the same circumference, the first positioning hole is a smoke shield closing position hole, and the second positioning hole is an smoke shield opening position hole, and the bottom surface of the sliding block facing the rotating connecting plate is provided with an in-position reminder point and a position locking area that cooperate with the first positioning hole and the second positioning hole, thereby locking the smoke shield when the smoke shield is opened and closed in place.

[0013] Furthermore, the bottom surface of the slider facing the rotating connecting plate side is divided from bottom to top into a smoke barrier closing buffer zone and a smoke barrier opening buffer zone, the in-place reminder point and the position locking zone are located between the smoke barrier closing buffer zone and the smoke barrier 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 barrier closing buffer zone when closed, and the second contact buffer zone contacts the smoke barrier opening buffer zone when opened, thereby providing a gain buffer function when the smoke barrier is opened and closed, further improving the user experience.

[0014] Furthermore, the smoke barrier closing buffer zone and the smoke barrier opening buffer zone are inclined surfaces, and the smoke barrier closing buffer zone gradually inclines from bottom to top in the direction of the rotating connecting plate, and the smoke barrier opening buffer zone gradually inclines from bottom to top in the direction away from the rotating connecting plate. Different resistance changes can be obtained through the inclined surface angles, which bring different force experiences to users.

[0015] Preferably, the in-place reminder point and the position locking area are spherical.

[0016] Furthermore, the rotating shaft assembly also includes a fixed plate fixed in the housing, the fixed plate is arranged on the side of the guide plate away from the support plate, the fixed plate is provided with a first guide groove, the guide plate is provided with a second guide groove, and the rotating connecting plate is provided with a pin shaft that cooperates with the first guide groove and the second guide groove. The rotating connecting plate can drive the pin shaft to rotate in each guide groove, and the cooperation between the pin shaft and the guide groove prevents the rotating connecting plate from swinging left and right, thereby ensuring the stability of the rotation, and the guide groove also plays a role of limiting.

[0017] Furthermore, a handle is provided on the smoke baffle, and the handle can provide a fulcrum for manually opening or closing the smoke baffle.

[0018] Compared with the prior art, the advantages of the present invention are: by providing a manually operated smoke shield and a shaft assembly that rotatably connects the smoke shield and the shell, the shaft assembly provides rotational support for the opening and closing of the smoke shield, and manual operation can not only enhance the user experience of users who like a mechanical feel, but also reduce the product maintenance rate and cost, and ensure the consistency of the overall appearance of the machine; by providing a buffer zone, a gain buffer function is provided when the smoke shield is opened and closed, and when the smoke shield is rotated to the closed or working position, a sudden change in force and a "click" sound are used to provide a reminder function of when the smoke shield is in place. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 2 Schematic diagram of the range hood in the open state according to an embodiment of the present invention (with Figure 1 different perspectives);

[0021] Figure 3 It is a schematic diagram of a range hood in an open state with a portion of the housing hidden;

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

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

[0024] Figure 6 Schematic diagram of the rotating shaft assembly of the range hood according to an embodiment of the present invention (with Figure 5 different perspectives);

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

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

[0027] Fig. 9 Schematic diagram of the exploded structure of the rotating shaft assembly of the range hood according to the embodiment of the present invention (with Figure 8 different perspectives);

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

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

[0030] Fig.12 Schematic diagram of the rotating connecting plate of the rotating shaft assembly of the range hood according to the embodiment of the present invention (with Fig.11 different perspectives);

[0031] Fig.13 It is a schematic diagram of the cooperation between the rotating connecting plate and the sliding block of the rotating shaft assembly of the range hood according to the embodiment of the present invention;

[0032] Fig.14 A partial cross-sectional view of the range hood in an intermediate state from an open state to a closed state according to an embodiment of the present invention;

[0033] Fig.15 A partial cross-sectional view of a range hood in a closed state according to an embodiment of the present invention;

[0034] Fig.16 A schematic diagram of the forces acting when the smoke baffle of a range hood according to an embodiment of the present invention is closed;

[0035] Fig.17 and Fig.18 It is a schematic diagram of force variation when the smoke baffle of the range hood according to the embodiment of the present invention is rotated into place. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below with reference to the accompanying drawings.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present invention can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0038] See also Figure 1 to Figure 4 A range hood is a side suction range hood, comprising a housing 1 and a fan 2, wherein the fan 2 can be partially or completely placed in the housing 1. A panel 5 is provided at the front side of the housing 1, and an air inlet 51 is provided on the panel 5. A smoke baffle 3 is provided at the air inlet 11, and the smoke baffle 3 can be turned relative to the housing 1 to open and close the air inlet 11. The range hood further comprises an oil guide plate 6, which is provided at the front side of the fan 2 and has 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 shell 1 and is used as a fulcrum for manually opening or closing the smoke baffle 3.

[0040] The range hood further includes two sets of shaft assemblies 4, which are respectively arranged on the left and right sides of the smoke baffle 3, so as to connect the smoke baffle 3 and the housing 1. The shaft assembly 4 provides three functions for the smoke baffle 3: rotation support, gain buffering for closing and opening, and reminder of the closing and opening positions. The left and right sets of shaft assemblies 4 are symmetrical structures. The following takes the left set of shaft assemblies 4 as an example to describe its structure in detail.

[0041] See also Figures 5 to 10The shaft assembly 4 includes a fixed plate 41, a guide plate 42, a rotating connecting plate 43, a supporting plate 44, a slider 45 and an elastic member 46. The fixed plate 41 is fixed in the housing 1 by screws, such as being fixed to the oil guide plate 6. The guide plate 42 is welded and fixed to the fixed plate 41, and the two are arranged in parallel. The fixed plate 41 is provided with an arc-shaped first guide groove 411, and the guide plate 42 is provided with an arc-shaped second guide groove 421. At least one of the guide grooves is a through groove, which penetrates the corresponding plate along the thickness direction of the plate. In this embodiment, both guide grooves are through grooves.

[0042] The rotating connecting member 43 is arranged on the side of the guide plate 42 away from the fixed plate 41, and can be movably riveted with the guide plate 42, so that the rotating connecting member 43 can rotate around the riveted part close to the guide plate 42, and the rotation axis extends in the left and right direction. A pin 47 is arranged on the rotating connecting member 43, and the pin 47 passes through the guide grooves on the guide plate 42 and the fixed plate 41. Therefore, when the rotating connecting member 43 rotates relative to the guide plate 42, the pin 47 can be driven to rotate in each guide groove. The cooperation between the pin 47 and the guide groove prevents the rotating connecting plate 43 from swinging left and right, ensuring the stability of the rotation, and the guide groove also plays a role of limiting. The end of the rotating connecting plate 42 away from the guide plate 42 can be connected and fixed to the smoke baffle 3 by screws, so when the rotating connecting plate 43 rotates, the smoke baffle 3 is driven to rotate together.

[0043] The rotation center of the rotating connecting plate 43 (the center of the riveted joint with the guide plate 42) is O. With the rotation center O as the center of the circle, a first positioning hole 431 and a second positioning hole 432 are opened on the same circumference, wherein the first positioning hole 431 is a closed position hole of the smoke baffle 3, and the second positioning hole 432 is an open position hole of the smoke baffle 3. The rotating connecting plate 43 is also provided with a first contact buffer 433 adjacent to the first positioning hole 431, and a second contact buffer 434 adjacent to the second positioning hole 432. The first contact buffer 433 corresponds to the closed buffer, and the second contact buffer 434 corresponds to the open buffer. The extension lines of the profiles of the first contact buffer 433 and the second contact buffer 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 in an L-shape, wherein the first support portion 441, the guide plate 42 and the fixed plate 41 can extend in the same direction, and in this embodiment, they all extend in the vertical direction, and the second support portion 442 extends from the bottom of the first support portion 441 in a direction away from the guide plate 42, the support plate 44 is fixed to the guide plate 42, and the part of the rotating connecting plate 43 is located between the support plate 44 and the guide plate 42. Among them, the first support portion 441 can be fixed to the guide plate 42 by two screws, and the second support portion 442 can be fixed to the oil guide plate 6 by one screw. A boss 443 is provided on the side of the first support portion 441 facing the guide plate 42, so that a certain distance can be provided between the first support portion 441 and the guide plate 42, so as to ensure that the rotating connecting plate 43 can rotate freely between the support plate 44 and the guide plate 42. Optionally, there can be three bosses 443.

[0045] The second support part 442 is provided with a slot 444, into which the slider 45 and the elastic member 46 can be inserted, and a through hole 445 is provided at a portion of the first support part 441 corresponding to the slot 444, through which a portion of the slider 45 can pass, and the elastic member 46 is disposed between the slider 45 and the wall of the slot 444 away from the first support part 441. The elastic member 46 is preferably a spring, so that the slider 45 keeps the tendency to pass through the through hole 445. The rotating connecting member 43 can cooperate with the slider 45, and when the rotating connecting plate 43 rotates to the slider 45, a squeezing force is applied to the slider 45, and the slider 45 moves along the slot 444 under the action of the force, away from or close to the guide plate 42.

[0046] The slider 45 is substantially in the shape of an arc, that is, as shown in FIG. 8 , it is a circular arc convex toward the rear. Fig.10 As shown, it is a downward convex arc, the center of which 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: the smoke baffle closing buffer area A1 ( Fig.10 The grid lines in the middle are only used to clearly indicate the area range, and are not in the actual structure), the in-place reminder point and the position locking area A3 and the smoke baffle opening buffer area A2 ( Fig.10The oblique lines in the middle are only used to clearly show the area range, and there is no oblique line in the actual structure). Among them, the middle in-place reminder point and position locking area A3 are preferably spherical. The smoke barrier closing buffer area A1 can extend to the lower end close to the slider 45, and the smoke barrier opening buffer area A2 can extend to the upper end close to the slider 45. The smoke barrier closing buffer area A1 and the smoke barrier opening buffer area A2 are inclined surfaces. The smoke barrier closing buffer area A1 gradually tilts from bottom to top toward the direction of the rotating connecting plate 43, and the smoke barrier opening buffer area A2 gradually tilts from bottom to top away from the rotating connecting plate 43, the purpose of which is to obtain gain buffering.

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

[0048] When the smoke baffle 3 is closed, the smoke baffle 3 drives the rotating connecting plate 43 to rotate counterclockwise under the action of gravity and human thrust. Fig.14 and Fig.15 , wherein arrow 14 indicates the rotation direction of the rotating connection member 43. When the smoke shield 3 rotates to make the first contact buffer 433 of the rotating connection plate 43 contact the smoke shield closing buffer A1 of the slider 45, under the elastic force of the elastic member 46, the smoke shield 3 starts to decelerate and buffer, preventing the smoke shield 3 from impacting the metal frame of the panel 5. When the in-place reminder point and the position locking area A3 are inserted into the first positioning hole 431, the smoke shield 3 is closed in place with a "click" sound reminder, and the smoke shield 3 is locked in the current position under the elastic force of the elastic member 46. Fig.15 shown.

[0049] In the above process, see Fig.13 and Fig.16 , the gravity and thrust of the smoke baffle 3 overcome the friction force Fu applied by the elastic member 46, and the resistance Fu increases linearly with the change of the rotation angle, and the formula is as follows:

[0050] Ft=k*Δx

[0051]

[0052]

[0053] Wherein, Ft is the elastic force of the elastic member 46, K is the elastic coefficient of the elastic member 46, θ is the angle between the smoke baffle closing buffer zone A1 of the slider 45 and the rotating plane, μ is the friction coefficient between the rotating connecting plate 43 and the guide plate 42, R is the circumferential radius of each positioning hole of the rotating connecting plate 43, It is the rotation angle of the connecting plate 43 from the time when it starts to contact the smoke baffle closing buffer zone A1.

[0054] This design is also to remind the user that the smoke shield 3 is about to close in place and the speed needs to be slowed down, so as to obtain a comfortable smoke shield closing experience. When the smoke shield 3 is in the closed state, the user needs to manually apply a pulling force to open the smoke shield 3, and pull the first positioning hole 431 out of the slider 45 to the in-place reminder point and the position locking area A3.

[0055] When the smoke damper 3 is opened, the smoke damper 3 drives the rotating connecting plate 43 to rotate in the opposite direction (clockwise) under the pulling force of the person. When the second contact buffer zone 434 of the rotating connecting plate 43 contacts the smoke damper opening buffer zone A2 of the slider 45, the rotation resistance of the smoke damper 3 begins to increase, reminding the user that the smoke damper 3 is about to be in place, and utilizing the gain buffering effect to prevent the user from damaging the shaft assembly by excessive force. When the in-place reminder point and position locking zone A3 of the slider 45 are buffered to the in-place reminder point and the position locking zone A3 are inserted into the second positioning hole 432, the smoke damper 43 is opened in place, and the smoke damper 3 is locked in the current working position under the elastic force of the elastic member 46. The inclination angles of the smoke damper closing buffer zone A1 and the smoke damper opening buffer zone A2 of the slider 45 are inconsistent, so the resistance change with the rotation angle when the smoke damper 3 is closed and opened is also inconsistent. It can be adjusted according to actual user needs.

[0056] In the present invention, buffer zones are provided on the slider 45 and the rotating connecting plate 43, so that the elastic force of the elastic member 46 is converted into friction between the rotating connecting plate 43 and the guide plate 43 and the slider 45, and the friction is sinusoidally related to the rotation angle. The main function is to provide a gain buffer before the smoke shield 3 is about to reach the working position or the closed position, which can serve as a reminder that the smoke shield 3 is about to be in place, and can protect the smoke shield 3 from impact.

[0057] In addition, when the smoke baffle 3 rotates to the closed or open (working) position, a sudden change in force (the elastic force of the elastic member 46 changes from resistance to driving force) and a "click" sound provide a reminder function of the position being in place, that is, when the lowest point of the ball contacts the rotating connecting plate 43, the elastic force Ft is the largest at this time, so the friction force Fu also reaches the maximum, see Fig.17 Under the continuous thrust of the person, the ball enters the hole on the rotating connecting plate 43. At this time, the elastic force of the elastic member 46 is converted into a 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 thrust of the person is required, the movement stops, and the smoke baffle 3 is opened or closed 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 further comprises 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) comprises a guide plate (42), a rotating connecting plate (43) and a supporting plate (44); the guide plate (42) and the supporting plate (44) are fixed in the housing (1); the rotating connecting plate (43) is partially located between the guide plate (42) and the supporting plate (44); the rotating connecting plate (43) is rotatably connected to the guide plate (42) and fixed to the smoke baffle (3); the supporting plate (44) is provided with a slider (45) capable of being locked or unlocked with the rotating connecting plate (43); the slider (45) maintains a tendency to pass through the supporting plate (44) toward one side of the guide plate (42).

2. The range hood according to claim 1, characterized in that: The support plate (44) comprises a first support portion (441) and a second support portion (442) arranged at an angle, the first support portion (441) and the guide rail plate (42) being arranged in parallel, a slot (444) being provided on the second support portion (442), the slider (45) being inserted into the slot (444), and a through hole (445) for the slider (45) to pass through is provided at a portion of the first support portion (441) corresponding to the slot (444).

3. The range hood according to claim 2, characterized in that: The rotating shaft assembly (4) further comprises an elastic member (46), wherein the elastic member (46) is arranged between the slider (45) and a wall surface of the slot (444) away from the first supporting portion (441), so that the slider (45) maintains a tendency to pass through the through hole (445).

4. The range hood according to claim 2, characterized in that: A boss (443) is provided on one side of the first supporting portion (441) 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 of the circle, the rotating connecting plate (43) is provided with a first positioning hole (431) and a second positioning hole (432) on the same circumference. The first positioning hole (431) is a closed position hole of the smoke baffle (3), and the second positioning hole (432) is an open position hole of the smoke baffle (3). The bottom surface of the sliding block (45) facing the rotating connecting plate (43) is provided with an in-position reminder point and a position locking area (A3) 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 from bottom to top into a smoke barrier closing buffer zone (A1) and a smoke barrier opening buffer zone (A2); the in-position reminder point and the position locking zone (A3) are located between the smoke barrier closing buffer zone (A1) and the smoke barrier opening buffer zone (A2); the rotating connecting plate (43) is further 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 barrier closing buffer zone (A1) when closed, and the second contact buffer zone (434) contacts the smoke barrier opening buffer zone (A2) when opened.

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

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

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

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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