CN111536568B

CN111536568B - Fume exhaust fan

Info

Publication number: CN111536568B
Application number: CN202010479376.0A
Authority: CN
Inventors: 徐梦玲; 孙斌; 朱学江
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2022-01-14
Anticipated expiration: 2040-05-29
Also published as: CN111536568A

Abstract

The invention discloses a range hood, which comprises a shell, wherein the shell comprises side plates, a top plate and a rear plate, the top plate is connected between the top ends of the two side plates and the top end of the rear plate, the rear plate is connected between the rear ends of the two side plates and the top plate, and the range hood is characterized in that: the range hood further comprises at least two of a supporting structure, a first damping structure and a second damping structure: the left side and the right side in the shell are provided with rotating shaft seats which are respectively fixedly connected with the front sides of the side plates and the top plate, so that the rotating shaft seats form the supporting structure; the first shock absorption structure is arranged on the top plate and formed by sinking the surface of the top plate facing the outside of the shell into the shell, and the first shock absorption structure extends between the edges of the top plate; the second shock-absorbing structure is arranged on the side plate and formed by the fact that the surface, facing the outside of the shell, of the side plate is sunken in the shell, and the second shock-absorbing structure is annular.

Description

Fume exhaust fan

Technical Field

The invention relates to an oil fume purification device, in particular to a range hood.

Background

The range hood has become one of the indispensable kitchen household electrical appliances in modern families. The range hood works by utilizing the fluid dynamics principle, sucks and exhausts oil smoke through a centrifugal fan arranged in the range hood, and filters partial grease particles by using a filter screen. The centrifugal fan comprises a volute, an impeller arranged in the volute and a motor driving the impeller to rotate. When the impeller rotates, negative pressure suction is generated in the center of the fan, oil smoke below the range hood is sucked into the fan, accelerated by the fan and then collected and guided by the volute to be discharged out of a room.

The existing side-draft range hood, such as the lower air intake range hood disclosed in chinese patent with application number 201811378513.0, includes a casing, a fan, an air outlet, an oil screen, an oil receiving cup, an upper glass panel and a lower glass panel, the casing includes a top plate, a bottom plate, side plates, a back plate and a front inclined panel, the front inclined panel is provided with an oil smoke collecting hole; the air outlet is arranged on the top plate of the machine shell, and the oil receiving cup is detachably matched with the bottom plate of the machine shell; the oil screen is matched with the oil smoke collecting hole; the upper glass plate is fixedly connected with the upper part of the front inclined panel, and the lower glass panel is movably matched with the lower part of the front inclined panel; in a static state, the lower glass panel is attached to the lower part of the front inclined panel, and the upper end of the lower glass panel is opposite to the lower end of the upper glass panel; in the working state, the middle upper part of the lower glass panel is opposite to the upper glass panel, and the lower glass panel is in clearance with the upper glass panel. The supporting seat comprises a fixed seat plate and a supporting seat plate, and the fixed seat plate is vertical to the supporting seat plate; the supporting seat is arranged in a bilateral symmetry mode, the fixed seat plates are respectively fixedly connected with a back plate of the shell, and a speed reducer of the motor is fixed on the supporting seat plate of the supporting seat on the left side.

Because any object has certain mass and elasticity, under certain excitation conditions, when the mass of the object deviates from the balance position, the object can reciprocate around the balance position under the alternating action of the elastic restoring force and the velocity inertia force. At present, the box body, the side plate and the panel are commonly connected to support the overall structural strength of the range hood, so that overall resonance abnormal sound is easily generated, auditory noise is poor in perception, and overall vibration is caused.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a range hood aiming at the defects in the prior art, which can improve the structural strength of the range hood shell and reduce the resonance abnormal sound.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a range hood, includes the casing, the casing includes curb plate, roof and back plate, the roof is connected between the top of two curb plates, back plate, the back plate is connected between the rear end of two curb plates, roof, its characterized in that: the range hood further comprises at least two of a supporting structure, a first damping structure and a second damping structure:

the left side and the right side in the shell are provided with rotating shaft seats which are respectively fixedly connected with the front sides of the side plates and the top plate, so that the rotating shaft seats form the supporting structure;

the first shock absorption structure is arranged on the top plate and formed by sinking the surface of the top plate facing the outside of the shell into the shell, and the first shock absorption structure extends between the edges of the top plate;

the second shock-absorbing structure is arranged on the side plate and formed by the fact that the surface, facing the outside of the shell, of the side plate is sunken in the shell, and the second shock-absorbing structure is annular.

For the convenience of fixing the rotating shaft seat, the rotating shaft seat comprises a seat plate, a first fixing plate and a second fixing plate, the first fixing plate is arranged at the top end of the seat plate, the second fixing plate is arranged at the front end of the seat plate, the first fixing plate is fixedly connected with the top plate, and the second fixing plate is fixedly connected with the side plate.

Preferably, the pivot seat is as the motion of keeping off the cigarette board partly, range hood is still including setting up the panel in the casing front side and setting up the fender cigarette board subassembly on the panel, the air intake has been seted up on the panel, the fender cigarette board subassembly is including the fender cigarette board that can open or close the air intake, range hood is still including the motion that is used for driving the upset of keeping off the cigarette board, the motion includes the pivot seat, be connected with the pivot between the front end of bedplate and the fender cigarette board, pivot seat and pivot junction are the rotation center of keeping off the cigarette board.

In order to facilitate the arrangement of the rotating center, the rotating center is higher than the first fixing plate, the front end of the top plate is provided with a position avoiding groove for the rotating center to penetrate upwards, and a connecting part of the top end of the panel and the top plate is provided with a rotating shaft accommodating groove which is sunken upwards.

Preferably, the motion includes the drive end and the driven end that set up respectively in the casing left and right sides, the drive end is including the actuating mechanism and one of them pivot seat that can drive the turning of cigarette board, the driven end includes another pivot seat, actuating mechanism fixes on corresponding pivot seat, the top of pivot is connected with the bedplate rotation of pivot seat to the pivot is connected fixedly with cigarette board.

Receive wearing and tearing or by range hood internal environment influence for avoiding the pencil, keep off the cigarette board subassembly still including setting up the switch module that keeps off cigarette board one side in the casing, switch module includes switch backplate, circuit board and pencil protection axle sleeve, switch backplate and fender cigarette board fixed connection, the circuit board sets up between fender cigarette board and switch backplate, pencil protection axle sleeve rotates with switch backplate towards one side in the casing and is connected and the axis of rotation extends in the direction of controlling, pencil protection axle sleeve passes from the panel and gets into in the casing.

Preferably, to better strengthen the structure and avoid resonance, the first shock-absorbing structure comprises a first end portion facing the connection between the side plate and the top plate or the supporting structure, and a second end portion facing the connection between the top plate, the rear plate and the side plate, wherein the first end portion is positioned in front of the second end portion.

Preferably, the first shock absorption structure comprises a first shock absorption arc component arranged on the left side of the top plate and a second shock absorption arc component arranged on the right side of the top plate, the first shock absorption arc component comprises at least two arc-shaped first shock absorption arcs which are arranged at intervals, each first shock absorption arc protrudes towards the middle, and two ends of each first shock absorption arc are respectively used as a first end part and a second end part; the second shock absorption arc assembly comprises at least two arc-shaped second shock absorption arcs arranged at intervals, each second shock absorption arc protrudes towards the middle, and two ends of each second shock absorption arc are respectively used as a first end part and a second end part.

Preferably, in order to better change the vibration frequency, the distance between the first shock absorption arcs is 15-25 mm, the diameter of each first shock absorption arc is gradually and orderly increased from the left side to the middle, the diameter range is 100-300 m, and the depth of each first shock absorption arc recess is 1 mm; the distance between every two second shock absorption arcs is 15-25 mm, the diameter of every two second shock absorption arcs is gradually and orderly increased from the left side to the middle, the diameter range is 100-300 m, and the depth of every two second shock absorption arc is 1 mm.

Preferably, the second damping structure is a triangular annular structure with the shape consistent with that of the side plate, and three edge transition positions of the second damping structure are all arc transition positions.

Preferably, for better changing the vibration frequency, the depth of the recess of the second shock absorption structure is 1mm, the width of the recess is 15-35 mm, the distance between the outer edge of each side of the second shock absorption structure and the corresponding periphery of the side plate is not more than 35mm, and the radius of each circular arc is 10-20 mm.

Compared with the prior art, the invention has the advantages that: the double-triangular supporting structure is arranged at the joint of the top plate and the side plate, the first damping structure is arranged on the top plate, and the second damping structure is arranged on the side plate, so that the resonance abnormal sound of the whole machine can be effectively reduced, the structural strength of the whole machine is good, and the noise is low; the first damping structure is selected as a bidirectional arc-extinguishing structure, the 'double-triangular' supporting structure is used as an end point, and the 'horn-type' structure is unfolded, so that the top plate mode is changed into 116 Hz, the excitation of nearly 100Hz is avoided, and the structure noise of the whole machine is weakened; the annular second damping structure enables the side plate mode to be 141 Hz, the excitation of nearly 100Hz is avoided, and the noise of the whole structure is weakened; the double-triangular supporting structure, the first damping structure and the second damping structure can be combined in pairs, so that the inherent frequency of the whole machine system is high, the rigidity of the whole machine is enhanced, the structural stability is ensured, and the generation of resonance abnormal sound is avoided.

Drawings

Fig. 1 is a schematic view of a range hood according to an embodiment of the present invention in a closed state;

fig. 2 is a schematic view of an open state of the range hood according to the embodiment of the present invention;

FIG. 3 is a cross-sectional view of FIG. 2;

FIG. 4 is a partial schematic view of FIG. 2;

fig. 5 is a schematic view of a rotating shaft seat of a moving mechanism of a smoke baffle of the range hood according to the embodiment of the invention;

FIG. 6 is a schematic front view of the hidden smoke barrier of FIG. 4;

FIG. 7 is a schematic view of a panel of a range hood according to an embodiment of the present invention;

FIG. 8 is a schematic view of a top plate and a back plate of a range hood according to an embodiment of the present invention;

fig. 9 is a schematic view of a side plate of the range hood according to the embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar functions.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and to simplify the description, but are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and that the directional terms are used for purposes of illustration and are not to be construed as limiting, for example, because the disclosed embodiments of the present invention may be oriented in different directions, "lower" is not necessarily limited to a direction opposite to or coincident with the direction of gravity. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

Referring to fig. 1 to 3, a range hood is a side-draft range hood, and includes a housing 1, a panel 2 disposed on a front side of the housing 1, and a fan system 3 disposed in the housing 1, wherein an air inlet 21 is disposed on the panel 2, a filter screen 4 is disposed at the air inlet 21, the air inlet 21 is rectangular, and a length direction thereof extends along left and right directions. The filter screen 4 can be detachably connected with the periphery of the air inlet 21 through a magnet. Still be provided with on the panel 2 and open or close the cigarette board subassembly 6 that keeps off of air intake 21, keep off cigarette board subassembly 6 including keeping off cigarette board 61, air intake 21 is located the upper portion of panel 2, and the center of rotation that keeps off cigarette board 61 is located the top of panel 2, constitutes two segmentation panel structures (keep off cigarette board 61 for one section, panel 2 is located the air intake 21 below for one section).

Referring to fig. 9, the housing 1 includes side plates 11 at left and right sides, a bent portion 12 bent toward the middle is provided at a front side of the side plates 11, the housing 1 further includes a top plate 14 and a rear plate 15, and the top plate 14 and the rear plate 15 may be connected separately or integrally formed. The top plate 15 is connected between the top ends of the two side plates 11 and the rear plate 15, and the rear plate 15 is connected between the rear ends of the two side plates 11 and the top plate 14. The front side of the side plate 11 is inclined from top to bottom gradually to be inclined backward, so that the side plate 11 is triangular.

Referring to fig. 2, 4 and 6, the left and right sides of the smoke baffle 61 are respectively provided with a baffle 8, so that the smoke baffle 6 and the baffle 8 form a smoke gathering mechanism for preventing smoke from escaping, and a smoke gathering cavity is formed in the smoke gathering mechanism. Each baffle 8 is in a wing shape with a small upper part and a big lower part, the top end of the front side of the baffle 81 is preferably flush with the top end of the smoke baffle 6, and the front side of the baffle 81 is attached to the surface of the smoke baffle 6 facing the inside of the shell 1.

The smoke barrier assembly 6 further comprises a smoke barrier support 62 and a switch assembly 63. The smoke barrier support 62 is used for connecting with a motion mechanism for driving the smoke barrier 61 to turn. Switch module 63 sets up in the one side of keeping off cigarette board 61 in towards casing 1, including switch backplate 631, circuit board 632 and pencil protection axle sleeve 633, switch backplate 631 and keeping off cigarette board 61 fixed connection, circuit board 632 sets up between keeping off cigarette board 61 and switch backplate 631, and pencil protection axle sleeve 633 rotates with switch backplate 631 one side in towards casing 1 to be connected, and its axis of rotation is left and right extended, can revolute the axis of rotation and carry out 180 rotations. The upper portion of the panel 2 is provided with a receiving chamber 22 corresponding to the switch assembly 63, and the receiving chamber 22 is formed by the front surface of the panel 2 being depressed backward. A through hole 221 is formed in the panel 2 at a position located in the accommodating cavity 22, the through hole 221 is preferably oval, a rubber ring 222 is embedded at the periphery, and the wire harness protective sleeve 633 penetrates through the middle of the rubber ring 222 and enters the housing 1. When the smoke barrier 61 moves, the switch assembly 63 moves in the accommodating cavity 22 along with the opening and closing of the smoke barrier 61, and the wire harness protection shaft sleeve 633 moves in the through hole 221 of the accommodating cavity 22 along with the opening and closing of the smoke barrier 61, so that the smooth closing is realized without interference.

Referring to fig. 4 and 5, in order to facilitate driving the smoke barrier 6 to turn, the range hood further includes a moving mechanism, which includes a driving end and a driven end, wherein the driving end includes a driving mechanism 91, a transmission mechanism 92 and a rotating shaft seat 93, the driven end is opposite to the driving end, the driving mechanism 91 is omitted, and a rotating shaft 923 (which will be described in detail below) and a rotating shaft seat 93 of the transmission mechanism 92 are reserved. The driving end and the driven end are respectively arranged at the left side and the right side of one side of the smoke baffle 6 facing the inside of the shell 1. By the above-described movement mechanism, the smoke barrier 61 is mounted to rotate at a fixed point with respect to the housing 1. The driving mechanism 91 is a motor in this embodiment, an output shaft of which extends left and right, the driving mechanism 91 is fixed on the rotating shaft seat 93, and the output shaft of the driving mechanism 91 passes through the rotating shaft seat 93 and can rotate relative to the rotating shaft seat 93. The transmission mechanism 92 includes a first link 921, a second link 922, and a rotation shaft 923. The one end of first connecting rod 921 is connected with actuating mechanism 91's output shaft, the other end rotates with second connecting rod 922 to be connected, and the front end of second connecting rod 922 rotates with the cigarette board support 62 that keeps off on the cigarette board 61 to be connected, and the top of pivot 923 rotates with the bedplate 931 of pivot seat 93 to pivot 923 is connected fixedly with cigarette board support 62.

Each of the rotary shaft mounts 93 includes a mount 931, a first fixing plate 932 provided at a tip end of the mount 931, and a second fixing plate 933 provided at a front end of the mount 931, the first fixing plate 932 being fixed to a front side of the top plate 14. The second fixing plate 933 is fixedly connected to the bent portion 12 (the front side of the side plate 11). Therefore, the two rotating shaft seats 93 form a double-triangular supporting structure, and the structural strength of the shell 1 can be effectively improved.

The front end of the seat plate 931 is higher than the first fixing plate 922, and the joint of the first fixing plate 922 and the rotating shaft 923 forms a rotating center 934 of the smoke baffle 61. Referring to fig. 7 and 8, a clearance groove 141 is formed at the front end of the top plate 14, and the rotation center 934 passes upward through the clearance groove 141. An upward concave rotating shaft accommodating groove 23 is formed at the joint of the top end of the panel 2 and the top plate 14 and used for accommodating a rotating center 934.

Any body has a mass and a resilience, and under certain excitation conditions, when the mass of the body deviates from its equilibrium position, it will reciprocate around the equilibrium position under the alternating action of its elastic restoring force and velocity inertial force. Mechanical vibration is a special form of movement in which a mechanical system reciprocates about its equilibrium position.

The mode is the vibration mode of the structure under the action of external excitation, is the inherent property of an object and is irrelevant to the working condition. Given a small excitation, the structure produces a vibratory response, and the weaker the structure is, the larger the vibration amplitude will be.

Due to the elastic action of the system, the mass of the system will exhibit a vibration behavior after deviating from the equilibrium position, and when the external excitation is coupled with the inherent behavior of the system structure, the vibration will occur. Therefore, when the structure of the range hood is designed, the whole machine does not generate dynamic coupling, and the structural resonance is avoided.

For the range hood, the main frequency of the resonance abnormal sound is concentrated at 100HZ or 100HZ frequency doubling part, when the dynamic balance is not good, the frequency conversion b generates the phenomenon of 'modulation', the frequency is mainly n × 100 ± bHz (n is 0,1,2 …; b is frequency conversion), the main sources are structural noise, the machine body is not firm, unstable, and slackened and fluctuated, the weak vibration from the motor is the main vibration source for exciting the abnormal sound, but the vibration source is the original operation, is caused by bad power voltage waveform, and cannot be eliminated, and the motor (not marked) of the fan system 3 must vibrate when rotating; and the abnormal sound is not directly produced and sent from the motor body, is enlarged through the whole structure and is produced, and the range hood in operation is a whole full of vibration energy, and when any point or place in the overall structure of the range hood has the defects of infirm and the like, collision, friction, relaxation and shaking phenomena and vibration aggravation among parts can occur, so that the abnormal sound is sent. If the sounding body does not vibrate or the vibration quantity is small, abnormal sound cannot be generated, so that when the rigidity is designed, the structural rigidity is as high as possible, the inherent frequency of the system is high, additional load cannot occur, and the structural stability is ensured.

To improve the structural rigidity, it is first necessary to form a closed space structure, and for the same mass structure, frame structure, the support structure will be more rigid than the plate structure. Thus, the "double triangular" support structure described above, as an shelf structure, adds overall structural strength. Because the length of the casing 1 itself is about 900mm, and the main noise frequency of the whole structure is concentrated at 100HZ or 100HZ frequency doubling position, referring to fig. 8, besides the strength of the whole structure is enhanced by the double-triangular supporting structure, a first damping structure is arranged on the top plate 14 between the double-triangular supporting structure.

The first shock absorption structure is a bidirectional shock absorption arc structure, and comprises a first shock absorption arc component 71 and a second shock absorption arc component 72 which are arranged on the left side and the right side of the top plate 14. In this embodiment, the top plate 14 is provided with an air outlet 142, and the first arc-extinguishing member 71 and the second arc-extinguishing member 72 are respectively disposed on the left and right sides of the air outlet 142. The first shock absorbing arc assembly 71 includes at least two spaced first shock absorbing arcs 711 of an arc shape, each first shock absorbing arc 711 protruding toward the middle. The second shock absorbing arc assembly 72 includes at least two spaced apart second shock absorbing arcs 721 of an arc shape, each second shock absorbing arc 721 projecting toward the middle. The first and

second arcs

711 and 721 are each formed by the surface of the top plate 14 facing the outside of the housing 1 being recessed into the housing 1.

Preferably, the first damping arches 711 are equally spaced apart and the second damping arches 721 are equally spaced apart. The distance between the first shock absorbing arcs 711 is preferably 15 to 25mm, more preferably 15mm, the diameters of the first shock absorbing arcs gradually increase from the left side to the middle side in order, the preferred range of the diameters is 100 to 300m, more preferably the diameters increase to 295mm in order with the diameter of 150mm as a base number (the diameters are distributed in an arithmetic progression), and the preferred depth of the recess is 1 mm. The distance between the second shock absorbing arcs 721 is preferably 15 to 25mm, more preferably 15mm, the diameters of the second shock absorbing arcs gradually increase from the right side to the middle, the preferred range of the diameters is 100 to 300m, more preferably the diameters increase to 295mm in a base-to-base sequential manner with 150mm as a base (the diameters are distributed in an arithmetic progression), and the preferred depth of the recess is 1 mm. And the bidirectional shock absorption arc structure takes a double-triangular support structure as an end point, the horn-type structure is unfolded, and one end with a small horn mouth is positioned at the rear side. The mode of the top plate 14 is changed into 116 Hz, the excitation of nearly 100Hz is avoided, and the noise of the whole structure is weakened.

Referring to table 1, for the experimental results of whether the bi-directional arc extinguishing structure is set:

TABLE 1 relation table for bi-directional damping arc and noise

In this embodiment, the first and

second arcs

711 and 721 are both directed toward the triangular support structure (the junction of the side panel 11 and the top panel 14) at one end and toward the rear panel 15 at the other end. Alternatively, the other end may face the side plate 11. The first shock-absorbing structure comprises, where applicable, a first end towards the junction of the side panel 11 and the top panel 14 or the support structure, and a second end towards the junction of the top panel 14, the rear panel 15 and the side panel 11, said first end being located before the second end, both ends being close to the edge of the top panel 14.

Similarly, a second shock absorption structure 73 is arranged on the left side plate 11 and the right side plate 11 between the double-triangular support structures, the second shock absorption structure 73 is an annular shock absorption ring formed by the surface of the side plate 11 facing the outside of the shell 1 and sinking towards the inside of the shell 1, the shock absorption ring forms an annular runway structure, and the shape of the shock absorption ring is preferably triangular and is consistent with the shape of the side plate 11. The concave depth of each second damping structure 73 is preferably 1mm, the width is preferably 15-35 mm, and more preferably 25mm, the distance between the outer edge of each side and the corresponding periphery of the side plate 11 is not more than 35mm, preferably 30mm, the three edge transition positions of the triangle are all arc transition, the radius of each arc is 10-20 mm, the mode of the side plate 11 is changed into 141 Hz, excitation of nearly 100Hz is avoided, and the noise of the whole structure is reduced.

Referring to table 2, for the experimental result of whether the second shock absorbing structure is provided or not:

TABLE 2 relationship table of whether the second damping structure is arranged or not and the noise

When the range hood operates, the vibration of the maximum vibration surface of the top plate can be divided into two-way shock-absorbing arc structures, and the structure of the 'annular runway' can improve the structural strength of the whole machine and reduce the resonance abnormal sound of the whole machine. The double-triangle support structure, the bidirectional shock absorption arc structure and the annular runway structure can be only used, so that the inherent frequency of the whole machine system is high, the rigidity of the whole machine is enhanced, the structural stability is ensured, and the generation of resonance abnormal sound is avoided.

Claims

1. A range hood comprises a shell (1), wherein the shell (1) comprises side plates (11), a top plate (14) and a rear plate (15), the top plate (14) is connected between the top ends of the two side plates (11) and the rear plate (15), the rear plate (15) is connected between the rear ends of the two side plates (11) and the top plate (14), the range hood further comprises a panel (2) arranged on the front side of the shell (1) and a smoke baffle plate assembly (6) arranged on the panel (2), an air inlet (21) is formed in the panel (2), the smoke baffle plate assembly (6) comprises a smoke baffle plate (61) capable of opening or closing the air inlet (21), and the range hood further comprises a moving mechanism used for driving the smoke baffle plate (61) to overturn; the method is characterized in that: the range hood further comprises a supporting structure, a first damping structure and a second damping structure (73):

the movement mechanism comprises a rotating shaft (923) and rotating shaft seats (93) arranged on the left side and the right side in the shell (1), each rotating shaft seat (93) comprises a seat plate (931), the top end of the rotating shaft (923) is rotatably connected with the seat plate (931) of the corresponding rotating shaft seat (93), the rotating shaft (923) is fixedly connected with the smoke baffle plate (61), the connecting position of the rotating shaft seat (93) and the rotating shaft (923) is a rotating center (934) of the smoke baffle plate (61), and the rotating shaft seats (93) are fixedly connected with the front sides of the side plates (11) and the top plate (14) respectively, so that the rotating shaft seats (93) form the supporting structure;

the first shock absorption structure is arranged on the top plate (14) and formed by sinking the surface of the top plate (14) facing the outside of the shell (1) into the shell (1), and the first shock absorption structure extends between the edges of the top plate (14); the first shock absorption structure comprises a first end part facing the connection position of the side plate (11) and the top plate (14) or the supporting structure, and a second end part facing the connection position of the top plate (14), the rear plate (15) and the side plate (11), wherein the first end part is positioned in front of the second end part;

the second damping structure (73) is arranged on the side plate (11) and formed by the fact that the surface, facing the outside of the shell (1), of the side plate (11) is sunken in the shell (1), and the second damping structure (73) is annular.

2. The range hood of claim 1, wherein: the pivot seat (93) is including setting up first fixed plate (932) and the second fixed plate (933) of setting at bedplate (931) front end at bedplate (931) top, first fixed plate (932) are connected fixedly with roof (14), second fixed plate (933) are connected fixedly with curb plate (11).

3. The range hood of claim 1, wherein: rotation center (934) is higher than first fixed plate (932), offer on the front end of roof (14) and supply rotation center (934) to upwards pass keep away position groove (141), the top of panel (2), with roof (14) junction, be formed with pivot storage tank (23) of upwards sunken.

4. The range hood of claim 1, wherein: the movement mechanism comprises a driving end and a driven end, wherein the driving end and the driven end are respectively arranged at the left side and the right side in the shell (1), the driving end comprises a driving mechanism (91) capable of driving the smoke baffle (61) to turn and one of the rotating shaft seats (93), the driven end comprises the other rotating shaft seat (93), and the driving mechanism (91) is fixed on the corresponding rotating shaft seat (93).

5. The range hood of claim 1, wherein: keep off cigarette board subassembly (6) still including setting up switch module (63) of keeping off cigarette board (61) towards one side in casing (1), switch module (63) are including switch backplate (631), circuit board (632) and pencil protection axle sleeve (633), switch backplate (631) and keep off cigarette board (61) fixed connection, circuit board (632) set up between keep off cigarette board (61) and switch backplate (631), pencil protection axle sleeve (633) and switch backplate (631) rotate towards one side in casing (1) and be connected and the axis of rotation extends in the left and right directions, pencil protection axle sleeve (633) pass on panel (2) and get into in casing (1).

6. The range hood of claim 1, wherein: the first shock absorption structure comprises a first shock absorption arc component (71) arranged on the left side of the top plate (14) and a second shock absorption arc component (72) arranged on the right side of the top plate (14), the first shock absorption arc component (71) comprises at least two arc-shaped first shock absorption arcs (711) which are arranged at intervals, each first shock absorption arc (711) protrudes towards the middle, and two ends of each first shock absorption arc (711) are respectively used as a first end part and a second end part; the second shock absorption arc assembly (72) comprises at least two arc-shaped second shock absorption arcs (721) arranged at intervals, each second shock absorption arc (721) protrudes towards the middle, and two ends of each second shock absorption arc (721) are respectively used as a first end part and a second end part.

7. The range hood of claim 6, wherein: the distance between the first shock absorption arcs (711) is 15-25 mm, the diameters of the first shock absorption arcs (711) gradually and sequentially increase from the left side to the middle, the diameter range is 100-300 m, and the sunken depth of each first shock absorption arc (711) is 1 mm; the distance between every two second shock absorption arcs (721) is 15-25 mm, the diameters of every two second shock absorption arcs (721) are gradually and orderly increased from the left side to the middle, the diameter range is 100-300 m, and the sunken depth of every two second shock absorption arc (721) is 1 mm.

8. The range hood of claim 1, wherein: the second damping structure (73) is a triangular annular structure with the shape consistent with that of the side plate (11), and three edge transition positions of the second damping structure (73) are all in arc transition.

9. The range hood of claim 8, wherein: the sunken degree of depth of second shock-absorbing structure (73) is 1mm, and the width is 15 ~ 35mm, the distance of each side outer edge of second shock-absorbing structure (73) and curb plate (11) corresponding periphery is not more than 35mm, and each circular arc radius is between 10 ~ 20 mm.