CN111006285B - Fume exhaust fan - Google Patents

Abstract

The invention discloses a range hood, which comprises a shell and a panel, wherein the front side of the shell is open, the panel is arranged at the opening of the shell, an air inlet is formed in the panel, and a smoke baffle plate capable of turning over relative to the panel so as to open or close the air inlet is arranged on the panel, and is characterized in that: the panel slides longitudinally relative to the shell so as to be capable of being located at a first position or a second position, and the position of the air inlet when the panel is located at the first position is higher than the position of the air inlet when the panel is located at the second position. Compared with the prior art, the invention has the advantages that: through setting up the gliding panel of relative casing for the position of air intake can be adjusted along with the oil smoke size, can improve the oil absorption cigarette effect, still makes the user can select between well inhaling and low inhaling in addition.

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.

Generally, the range hood comprises a top suction type range hood and a side suction type range hood, in the cooking process, in order to better absorb oil smoke, an air inlet is close to a smoke source, namely the side suction type range hood, the side suction type range hood absorbs most of oil smoke close to a cooking bench in an arc-shaped mode by using a vortex air pressure principle, adverse effects on human health can be reduced, and a power source is close to the cooking bench and basically cannot reduce the suction effect of the power source.

In order to improve the smoking capability of the existing side-draft range hood, the following two methods are mainly adopted: 1. the air intake is put down, but in order to avoid keeping off the cigarette board and make a pot risk, and will keep off the cigarette board and do little or cancel, like the low smoke absorption formula smoke ventilator that chinese patent publication of application number 201120406258.3, open the collection petticoat pipe that has the smoking mouth including the bottom, still be provided with the filter assembly of adjustable air inlet position on the smoking mouth, filter assembly includes that left and right both sides all are provided with the filter screen of a set of air inlet, and the horizontal slip is provided with the baffle that can shelter from the air inlet on the filter screen. Although the air inlet of the range hood is close to the smoke source, the smoke absorbing capacity is improved, and the mode of making the smoke baffle small or canceling the smoke baffle plate ensures that the oil smoke escapes when the oil smoke is large. 2. The air intake adopts and puts, chinese patent as application number 201610166266.2 discloses a side suction formula lampblack absorber, including collection petticoat pipe and movable mounting at the preceding front panel of collection petticoat pipe, the collection petticoat pipe is equipped with into the mouth, and the front panel can move in order to switch between opening, closed state relatively collection petticoat pipe, still includes: the smoke guide plate is movably arranged and can move to an extending state when the front panel is in an opening state, and at least one part of the smoke guide plate forms an eaves part in front of the front panel in the extending state so as to guide oil smoke to enter the smoke inlet. In order to prevent the oil smoke from escaping, the air volume and the back pressure of the fan system need to be increased, and compared with the oil smoke absorption effect of the same low range hood, the cost is greatly increased.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a range hood, which can adjust the position of an air inlet along with the size of oil smoke and improve the oil smoke absorption effect, aiming at the problems in the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a range hood, includes casing and panel, the front side opening of casing, the panel sets up the opening part at the casing, the air intake has been seted up on the panel, thereby be provided with the cigarette board that keeps off that can open or close the air intake opposite the panel upset on the panel, its characterized in that: the panel slides longitudinally relative to the shell so as to be capable of being located at a first position or a second position, and the position of the air inlet when the panel is located at the first position is higher than the position of the air inlet when the panel is located at the second position.

Preferably, the panel is driven by the first driving device and the first transmission device to slide, and the smoke baffle is driven by the second driving device and the second transmission device to independently turn over relative to the panel or to turn over by the linkage of the second transmission device and the panel.

Preferably, for the convenience of driving the panel to slide relative to the casing, the first driving device is a linear driving module arranged on one side of the panel facing the casing, the first driving device comprises a first sliding block and a first sliding rail, a first sliding groove used for being in sliding fit with the first sliding block is formed in the first sliding rail, the first sliding block is fixedly arranged on one side of the panel facing the casing, and the first driving device and the first sliding rail are respectively fixedly connected with the casing.

Preferably, in order to fix the first driving device and the first slide rail conveniently, the housing includes side plates located at the left and right sides, a front end of each side plate extends into the housing to form a first fixing plate, a rear end of each side plate extends into the housing to form a second fixing plate, and the first fixing plate is located at one side of the panel facing the housing; the first driving device is fixedly connected with the second fixing plate at the rear end, the first sliding rail is fixedly connected with the first fixing plate at the front end, and the first sliding block penetrates through the first fixing plate and can be matched with the first sliding groove.

According to one aspect of the invention, the smoke baffle plate and the panel act independently, the second driving device is a linear driving module arranged on one side of the panel facing the shell, the second transmission device comprises a second sliding block driven by the second driving device to slide longitudinally, a first smoke baffle plate support, a second sliding rail matched with the second sliding block in a sliding manner, a connecting rod, a second smoke baffle plate support and a first fixed support fixed on one side of the panel facing the shell, the first smoke baffle plate support and the second smoke baffle plate support are fixedly arranged on the smoke baffle plate, the second smoke baffle plate support is positioned above the first smoke baffle plate support, the first smoke baffle plate support is rotatably connected with the second sliding block, two ends of the connecting rod are respectively rotatably connected with the second smoke baffle plate support and the first fixed support, and the second sliding rail is fixedly arranged on one side of the panel facing the shell.

According to another aspect of the invention, the smoke baffle is linked with the panel, the second transmission device comprises a second sliding block which slides in opposite directions relative to the panel, a first smoke baffle support, a second sliding rail which is in sliding fit with the second sliding block, a connecting rod, a second smoke baffle support and a first fixed support which is fixed on one side of the panel facing the shell, the first smoke baffle support and the second smoke baffle support are fixedly arranged on the smoke baffle, the second smoke baffle support is positioned above the first smoke baffle support, the first smoke baffle support is rotatably connected with the second sliding block, two ends of the connecting rod are respectively rotatably connected with the second smoke baffle support and the first fixed support, and the second sliding rail is fixedly arranged on one side of the panel facing the shell.

In order to facilitate the connection between the second sliding block and the casing, the second transmission device further comprises a connecting rod and a second fixed support fixed in the casing, wherein the connecting rod is respectively connected with the second sliding block and the second fixed support, so that the second sliding block is fixed in the casing and can reversely slide relative to the panel.

Preferably, in order to limit the turning direction of the cigarette blocking plate, the first cigarette blocking plate support is rotatably connected with the second slide block through a first pin shaft, two ends of the connecting rod are respectively rotatably connected with the second cigarette blocking plate support and the first fixed support through a second pin shaft, and the second pin shaft and the first pin shaft extend left and right and are parallel to each other.

Form the clearance and lead to running the cigarette between the top of casing when avoiding the panel to be in the second position, the casing includes the baffle at the downward longitudinal extension of front end, when the panel is located the first position, the upper end of panel is located the front side of baffle, when the panel is located the second position, the upper end of panel and the lower extreme butt of baffle or the front side that is located the baffle.

In order to collect grease conveniently, the bottom of the shell is provided with an oil cup, and when the panel is located at the second position, the lower end of the panel is located in the oil cup.

Compared with the prior art, the invention has the advantages that: the panel which can slide relative to the shell is arranged, so that the position of the air inlet can be adjusted along with the size of oil smoke, the oil smoke absorption effect can be improved, the appearance can be changed, and a user can select between middle suction and low suction; the smoke baffle slides upwards to open, and the risk of beating the pot is avoided.

Drawings

Fig. 1 is a schematic view of a closed state of a central air inlet of a range hood according to a first embodiment of the present invention;

FIG. 2 is a partial schematic view of the range hood of FIG. 1;

FIG. 3 is an exploded view of FIG. 2;

fig. 4 is a schematic view illustrating an open state of the central air inlet of the range hood according to the first embodiment of the present invention;

FIG. 5 is a cross-sectional view of the range hood of FIG. 4;

FIG. 6 is a schematic view of a panel assembly of the range hood of FIG. 4 and a movement mechanism thereof;

fig. 7 is a schematic view of a lower-mounted closed state of an air inlet of the range hood according to the first embodiment of the present invention;

FIG. 8 is a schematic view of a panel assembly of the range hood of FIG. 7 and a movement mechanism thereof;

fig. 9 is a schematic view of a lower-mounted closed state of an air inlet of the range hood according to the first embodiment of the present invention;

fig. 10 is a cross-sectional view of the range hood of fig. 9;

fig. 11 is a schematic view of a panel assembly of the extractor hood of fig. 9 and a movement mechanism thereof;

fig. 12 is a partial schematic view of a range hood in a closed state according to a second embodiment of the present invention;

FIG. 13 is an exploded view of FIG. 12;

fig. 14 is a partial schematic view of the range hood according to the second embodiment of the present invention in an open state.

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.

Example one

Referring to fig. 1 to 5, a range hood is a side-draft range hood, and includes a housing 1, a fan frame 2 disposed above the housing 1, and a fan system 3 disposed in the fan frame 2. The housing 1 is open at the front side and is provided with a movable panel 4 at the opening. The front side of the shell 1 and the panel 4 are inclined and extended from top to bottom. The panel 4 is provided with an air inlet 41, the air inlet 41 is strip-shaped and transversely extends in the left-right direction, and the arrangement of the air inlet 41 is the same as that of the prior art. The air inlet 41 is provided with a smoke baffle 5 which is rotatably connected with the panel 4, so that the air inlet 41 can be opened or closed in a turnover way relative to the panel 4. An air outlet cover 6 is arranged above the fan frame 2, so that oil smoke enters the shell 1 from the air inlet 41 under the action of the fan system 3, upwards passes through the fan system 3 and then is discharged from the air outlet cover 6.

The casing 1 includes the curb plate 11 that is located left and right sides longitudinal extension, sets up baffle 12 between two curb plate 11 front side tops, and the front end of every curb plate 11 slopes backward gradually from top to bottom, and is unanimous with the incline direction of panel 4. An opening at the front side of the housing 1 is formed between the baffle plate 12 and the side plate 11. The upper end of the panel 4 is not lower than the lower end of the baffle plate 12 at least during the movement, i.e. the upper end of the panel 4 abuts against the lower end of the baffle plate 12 or is located at the front side of the baffle plate 12. An oil cup 7 is arranged at the bottom of the shell 1, and the upper end of the oil cup 7 is open and communicated with the inside of the shell 1.

The bottom of fan frame 2 is uncovered, communicate in with casing 1, from this the oil smoke can follow casing 1 and get into fan frame 2, still be provided with between two curb plates 11 and lead oiled-plate 13, lead oiled-plate 13 including be located the first oil portion 131 of leading of the horizontal extension of fan frame 2 below and lead the oil portion 132 by the rear end of first oil portion 131 downward longitudinal extension, first oil portion 131 can lead by the preceding downward sloping of backward direction for grease that drops in fan frame 2 leads oil portion 132 backward and along the second and flows downwards along first oil portion 131, until getting into in oil cup 7. The first oil guiding portion 131 may be in a grid shape, and may also filter oil smoke before entering the fan frame 2.

In order to adjust the position of the air inlet 41 according to different oil smoke sizes, in the present invention, the panel 4 is longitudinally slidably disposed relative to the housing 1, and the sliding direction is the same as the extending direction of the panel 4. For this purpose, a first driving device 81 and a first transmission device 82 are provided for driving the panel 4 to slide, the first driving device 81 is a linear driving module, in this embodiment, an electric push rod, and alternatively, an assembly of a motor and a lead screw, an assembly of a motor and a rack and pinion, an air pump, a hydraulic pump, and the like. First transmission 82 has two, sets up respectively in panel 4 towards the left and right sides of one side in the casing 1, and every first transmission 82 includes first slider 821 and first slide rail 822, has seted up first spout 823 on the first slide rail 822, and the extending direction of first spout 823 is unanimous with panel 4, inclines to extend from top to bottom gradually backward promptly, and is unanimous with panel 4's slip path. The first sliding blocks 821 are fixedly disposed on one side of the panel 4 facing the inside of the housing 1, and may be one or at least two, and when there are at least two, the first sliding blocks 821 are arranged at intervals in the extending direction of the first sliding groove 823. The first slider 821 is slidably engaged with the first sliding groove 823.

The first driving device 81 and the first sliding rail 822 are respectively fixedly connected with the housing 1, the first driving device 81 is disposed on one side of the first sliding rail 822 of one of the first transmission devices 82, which is far away from the panel 4, and the first sliding block 821 of the first transmission device 82 adjacent to the first driving device 81 passes through the first sliding groove 823 and is connected with an output end of the first driving device 81, where the output end is a portion of the linear driving module that outputs power, as long as the first sliding block 821 is connected with the portion that outputs power, and a specific connection position of the first sliding block 821 and the portion that outputs power is not limited.

In order to fix the first driving device 81 and the first sliding rail 822, in the present embodiment, a front end of each side plate 11 extends into the housing 1 (in a direction toward the other side plate 11) to form a first fixing plate 14, a rear end of each side plate 11 extends into the housing 1 (in a direction toward the other side plate 11) to form a second fixing plate 15, and the first fixing plate 14 is located on a side of the panel 4 facing into the housing 1. The first driving device 81 is fixedly connected to the second fixing plate 15 at the rear end, and the first slide rail 822 is fixedly connected to the first fixing plate 14 at the front end. A through groove 16 matched with the first sliding groove 823 is formed in the first fixing plate 14 at the front end, and the first sliding block 821 can penetrate through the through groove and can be matched with the first sliding groove 823.

Therefore, when the electric push rod extends, the first sliding block 821 and the first sliding rail 822 can slide relative to each other, and the first sliding block 821 drives the panel 4 to slide because the first sliding rail 822 is fixed.

In order to turn the smoke barrier 5 and thus open and close the air inlet 41, a second driving device 91 and a second transmission device 92 are provided for driving the smoke barrier 5 to turn, and the second driving device 91 is also a linear driving module which can adopt a scheme such as the first driving device 81. In the present embodiment, the second driving device 91 includes a motor 911 and a screw 912 connected to an output shaft of the motor 911. The motor 911 of the second driving device 91 is fixedly disposed at one side of the panel 4 facing the inside of the housing 1, and the extending direction of the screw 912 is the same as the extending direction of the panel 4 (gradually extends backwards from top to bottom), and is parallel to each other. The lead screw 912 is also parallel to the first runner 823.

The second transmission means 92 also has two, one of which is provided on the left side of the smoke barrier 5 and the face plate 4 facing the inside of the housing 1, and the other of which is provided on the right side of the smoke barrier 5 and the face plate 4 facing the inside of the housing 1. Every second transmission 92 establishes on lead screw 912 and with lead screw 912 threaded connection's second slider 920 including the cover, first cigarette board support 921 that keeps off, second slide rail 922, connecting rod 923 and second cigarette board support 924, wherein, first cigarette board support 921 that keeps off and second cigarette board support 924 are fixed to be set up on keeping off cigarette board 5, and second slide rail 922 is then fixed on panel 4, second cigarette board support 924 is located first cigarette board support 921 top that keeps off, as shown in this embodiment, first cigarette board support 921 that keeps off is close to the lower extreme that keeps off cigarette board 5, second cigarette board support 924 is close to the upper end that keeps off cigarette board 5.

The second driving device 91 is disposed near one of the second transmission devices 92, the first smoke barrier support 921 and the second slider 920 of the second transmission device 92 adjacent to the second driving device 91 are rotatably connected by a first pin 925, and the first pin 925 extends in the left-right direction. The second sliding rail 922 is arranged outside a part of the screw shaft 912, the second slider 920 slides in a part of the screw shaft 921 in the second sliding rail 922, and the motor 911 is arranged outside the second sliding rail 922 and fixed with the panel 4. The second sliding rail 922 is hollow to form a second sliding groove 926, the second sliding rail 922 is opened towards one side of the smoke baffle 5 (towards one side of the other second sliding rail 922), so that the second sliding groove 926 is communicated with the outside, and the extending direction of the second sliding groove 926 is consistent with that of the first sliding groove 823, and the second sliding groove 926 gradually inclines backwards and extends from top to bottom. The first smoke baffle support 921 is connected to the second slide block 920 through an opening on the second slide rail 922, and can move under the driving of the second slide block 920.

The second transmission 92 further comprises a first fixed support 927 disposed on the side of the panel 4 facing the inside of the housing 1, and the connecting rod 923 comprises a first rod portion 9231 and a second rod portion 9232 disposed at an angle to each other, e.g., at a right angle therebetween. The two rod parts are integrally formed and integrally protrude into the housing 1, i.e. the connecting positions of the two rod parts are far away from the panel 4. The one end that second pole portion 9232 was kept away from to first pole portion 9231 and between second cigarette board support 924, rotate through second round pin axle 928 between the one end that first pole portion 9231 was kept away from to second pole portion 9232 and the first fixed bolster 927 respectively and connect, and second round pin axle 928 is parallel with first round pin axle 925.

When motor 911 starts the operation, lead screw 912 rotates around its self axis, from this, second slider 920 is along lead screw 912 rectilinear movement, use the rectilinear motion that makes progress as an example, first cigarette board support 921 is driven upward movement by second slider 920, because the motion of first cigarette board support 921 and the rotation restriction of connecting rod 923, make second cigarette board support 924 outwards overturn, thereby make cigarette board 5 upwards slide (the lower extreme that keeps off cigarette board 5 upwards slides, the upper end outwards overturns and makes cigarette board 5 wholly outwards slide and turn up) open, can avoid beating a pot risk.

The range hood of the invention has the following working mode, and the position of the air inlet 41 can be set according to the habit of a user.

The first method is as follows: when the range hood is closed, the air inlet 41 is centrally positioned (the centrally positioned position in the present invention means that the air inlet 41 is positioned at a position approximately close to the middle of the front side opening of the housing 1, the panel 4 is positioned at the first position), the smoke barrier 5 closes the air inlet 41, and the smoke barrier is positioned at the closed third position, which is shown in fig. 1, and at this time, the upper end of the panel 4 is positioned at the front side of the baffle 12. After the range hood is started, the second driving device 91 is started, the smoke barrier 5 slides upwards through the second transmission device 92 to turn over to start the air inlet 41, and is located at the fourth opened position, which is shown in fig. 4 to 6; when the oil smoke increases (accessible oil smoke concentration sensor detects also can user owner's subjective judgement, when detecting with the sensor, can set for the oil smoke volume upper limit value, be greater than this upper limit value, judge promptly that the oil smoke volume is great, need adopt the underlying mode smoking), start first drive arrangement 81 this moment, drive panel 4 through second transmission 82 and slide downwards, because keep off cigarette board 5 and panel 4 and be connected, consequently, keep off cigarette board 5 and move downwards in step, thereby make air intake 41 underlying, be closer to the smoke source, improve the oil absorption cigarette ability, refer to fig. 9-11, the upper end of panel 4 and the lower extreme butt of baffle 12 this moment, the lower extreme of panel 4 then slides into in oil cup 7.

The second method comprises the following steps: when the range hood is closed, the air inlet 41 is disposed downward (the downward disposition of the present invention means that the air inlet 41 is located at a position approximately close to the lower portion of the front side opening of the housing 1, and the panel 4 is located at the second position), and the smoke barrier 5 closes the air inlet 41, as shown in fig. 7 and 8, at this time, the upper end of the panel 4 abuts against the lower end of the baffle 12. After the range hood is started, the second driving device 91 is started, the smoke barrier 5 slides upwards through the second transmission device 92 to turn over and open the air inlet 41, see fig. 9-11; when the oil smoke volume is not big (accessible oil smoke concentration sensor detects also can user owner subjective judgement, when detecting with the sensor, can set for oil smoke volume lower limit value, be less than this lower limit value, judge promptly that the oil smoke volume is not big, can adopt to put the mode smoking in, start first drive arrangement 81 this moment, drive panel 4 through second transmission 82 and upwards slide, owing to keep off cigarette board 5 and panel 4 and be connected, consequently, keep off cigarette board 5 synchronous upward movement, thereby make in the air intake 41, leave for the bigger operating space of user, see fig. 4-6, the upper end of panel 4 this moment is located the front side of baffle 12.

The one-key middle suction function and the one-key low suction function can be arranged on the control panel of the shell 1, when a user steams food, the one-key middle suction function can be started due to the fact that the space of the food steamer needs to be reserved, and the one-key low suction function can be started if the user wants to experience strong wind power.

Example two

Referring to fig. 12 to 14, in the present embodiment, the difference from the first embodiment described above is that the second driving device 91 is eliminated. One of the second actuators 92 further includes a connecting rod 930 fixedly connected to the second slider 920. A second fixed support 929 is arranged on one side of the baffle 12 facing the inside of the housing 1, the end of the connecting rod 930 exposed out of the second sliding rail 922 is rotatably connected with the second fixed support 929, and the connecting rod 930 can pass through the first fixed support 927.

In this embodiment, the range hood may be in a state where the air inlet 41 is disposed in the middle and the smoke barrier 5 is closed, or in a state where the air inlet 41 is disposed in the bottom and the smoke barrier 5 is opened. Specifically, the operating mode of the range hood is as follows: referring to fig. 12, the range hood is in a shutdown state, the air inlet 41 is disposed in the middle, and the smoke barrier 5 closes the air inlet 41. When a user starts the machine, referring to fig. 14, the first driving device 81 pulls the panel 4 to move downwards, and since the second slider 920 is fixed with the housing 1 and the second slide rail 922 is fixedly connected to the panel 4 to move downwards, the second slider 920 moves upwards relative to the second slide rail 922, so that the connecting rod 923 rotates around the second pin 928 of the first fixed support 927, the smoke barrier 5 is opened, the downward movement, the overturning and the opening in a linked manner are realized, and the machine start work is completed.

Claims (10)

1. The utility model provides a range hood, includes casing (1) and panel (4), the front side opening of casing (1), panel (4) set up the opening part at casing (1), air intake (41) have been seted up on panel (4), thereby be provided with on panel (4) and open or close cigarette board (5), its characterized in that of air intake (41) to panel (4) upset relatively: the panel (4) slides longitudinally relative to the shell (1) so as to be in a first position or a second position, and the position of the air inlet (41) when the panel (4) is located at the first position is higher than the position of the air inlet (41) when the panel (4) is located at the second position.

2. The range hood of claim 1, wherein: the panel (4) is driven by a first driving device (81) and a first transmission device (82) to slide, and the smoke baffle plate (5) is driven by a second driving device (91) and a second transmission device (92) to independently turn over relative to the panel (4) or to turn over by the linkage of the second transmission device (92) and the panel (4).

3. The range hood of claim 2, wherein: first drive arrangement (81) are for setting up at panel (4) towards the straight line drive module of casing (1) one side in, first drive arrangement (82) include first slider (821) and first slide rail (822), offer on first slide rail (822) and be used for with first slider (821) sliding fit's first spout (823), fixed setting of first slider (821) is towards one side in casing (1) in panel (4), first drive arrangement (81) and first slide rail (822) respectively with casing (1) fixed connection.

4. The range hood of claim 3, wherein: the shell (1) comprises side plates (11) positioned on the left side and the right side, the front end of each side plate (11) extends into the shell (1) to form a first fixing plate (14), the rear end of each side plate (11) extends into the shell (1) to form a second fixing plate (15), and the first fixing plate (14) is positioned on one side, facing the interior of the shell (1), of the panel (4); the first driving device (81) is fixedly connected with the second fixing plate (15) at the rear end, the first sliding rail (822) is fixedly connected with the first fixing plate (14) at the front end, and the first sliding block (821) penetrates through the first fixing plate (14) and can be matched with the first sliding groove (823).

5. The range hood of claim 2, wherein: the smoke baffle (5) and the panel (4) act independently, the second driving device (91) is a linear driving module which is arranged on one side of the panel (4) facing the shell (1), the second transmission device (92) comprises a second sliding block (920) driven by the second driving device (91) and sliding longitudinally, a first smoke baffle support (921), a second sliding rail (922) matched with the second sliding block (920) in a sliding manner, a connecting rod (923), a second smoke baffle support (924) and a first fixed support (927) fixed on one side of the panel (4) facing the shell (1), the first smoke baffle support (921) and the second smoke baffle support (924) are fixedly arranged on the smoke baffle (5), the second smoke baffle support (924) is positioned above the first smoke baffle support (921), the first smoke baffle support (921) is rotatably connected with the second sliding block (920), the both ends of connecting rod (923) rotate with second cigarette board support (924) and first fixing support (927) respectively and are connected, one side in panel (4) orientation casing (1) is fixed to second slide rail (922).

6. The range hood of claim 2, wherein: the smoke baffle (5) is linked with the panel (4), the second transmission device (92) comprises a second sliding block (920) which reversely slides relative to the panel (4), a first smoke baffle support (921), a second sliding rail (922) which is in sliding fit with the second sliding block (920), a connecting rod (923), a second smoke baffle support (924) and a first fixed support (927) which is fixed on one side of the panel (4) facing the inside of the shell (1), the first smoke baffle support (921) and the second smoke baffle support (924) are fixedly arranged on the smoke baffle (5), the second smoke baffle support (924) is positioned above the first smoke baffle support (921), the first smoke baffle plate support seat (921) is rotationally connected with the second sliding block (920), the two ends of the connecting rod (923) are respectively connected with the second smoke baffle support (924) and the first fixed support (927) in a rotating way, the second sliding rail (922) is fixedly arranged on one side, facing the inside of the shell (1), of the panel (4).

7. The range hood of claim 6, wherein: the second transmission device (92) further comprises a connecting rod (930) and a second fixed support (929) fixed in the shell (1), wherein the connecting rod (930) is respectively connected with the second sliding block (920) and the second fixed support (929), so that the second sliding block (920) is fixed in the shell (1) and can reversely slide relative to the panel (4).

8. The range hood according to any one of claims 5 to 7, wherein: first fender cigarette board support (921) rotates with second slider (920) through first round pin axle (925) and is connected, the both ends of connecting rod (923) are respectively through second round pin axle (928) and second fender cigarette board support (924) and first fixed bearing (927) rotation connection, second round pin axle (928) and first round pin axle (925) are controlled and are extended and be parallel to each other.

9. The range hood according to any one of claims 1 to 5, wherein: the shell (1) comprises a baffle plate (12) extending downwards and longitudinally at the front end, when the panel (4) is located at the first position, the upper end of the panel (4) is located at the front side of the baffle plate (12), and when the panel (4) is located at the second position, the upper end of the panel (4) is abutted to the lower end of the baffle plate (12) or located at the front side of the baffle plate (12).

10. The range hood of claim 9, wherein: an oil cup (7) is arranged at the bottom of the shell (1), and when the panel (4) is located at the second position, the lower end of the panel (4) is located in the oil cup (7).

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