CN110894966B

CN110894966B - Fume exhaust fan

Info

Publication number: CN110894966B
Application number: CN201911082110.6A
Authority: CN
Inventors: 王潭; 茅忠群; 施旭娜
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2019-11-07
Filing date: 2019-11-07
Publication date: 2021-07-23
Anticipated expiration: 2039-11-07
Also published as: CN110894966A

Abstract

The invention discloses a range hood, which comprises a smoke collecting hood and a smoke isolating screen assembly, wherein the smoke isolating screen assembly comprises a first smoke isolating screen and a second smoke isolating screen which are respectively arranged at the left side and the right side of the smoke collecting hood and can overturn relative to the smoke collecting hood, the smoke isolating screen assembly also comprises a turnover mechanism for driving the first smoke isolating screen and the second smoke isolating screen to overturn, a lifting mechanism for driving the first smoke isolating screen and the second smoke isolating screen to lift, a first lifting plate rotationally connected with the first smoke isolating screen, and a second lifting plate rotationally connected with the second smoke isolating screen; the turnover mechanism comprises a first turnover mechanism and a second turnover mechanism, the first turnover mechanism comprises a first liftable slide bar, the second turnover mechanism comprises a second liftable slide bar, the second liftable turnover mechanism comprises a second liftable slide bar, the first slide bar and the first smoke barrier are connected through a first connecting rod mechanism, and the second slide bar and the second smoke barrier are connected through a second connecting rod mechanism; the lifting mechanism comprises a third lifting slide bar which can be lifted, and the third slide bar is respectively connected with the first lifting plate and the second lifting plate.

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 indispensable kitchen appliances in modern families, utilizes the fluid dynamics principle to work, inhales and exhausts oil smoke through a centrifugal fan arranged in the range hood, and uses a filter screen to filter partial grease particles. 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.

Most range hoods on the market at present have a relatively high negative pressure region due to the relatively long distance between the range hood and the cookware, and the oil smoke easily escapes to the periphery when rising, so that the phenomenon of incomplete smoke discharge exists. Therefore, a range hood with a function of lifting a smoke baffle plate appears in the prior art, for example, chinese patent application No. 201610185858.9 discloses a range hood, which comprises a fan housing and a smoke collecting hood, wherein movable smoke baffle plates are mounted on the left and right sides of the smoke collecting hood, the movable smoke baffle plates are arc-shaped with concave surfaces facing downwards, and the movable smoke baffle plates are driven by a driving mechanism to retract into the smoke collecting hood along an arc-shaped track upwards or extend out of the smoke collecting hood downwards. The range hood has the advantages that the negative pressure region of the range hood can be moved downwards under the extending state of the smoke baffle plate, the oil smoke absorption effect is improved, the oil smoke is not easy to escape from the two sides of the smoke collecting hood, but the smoke baffle plate is hidden in the smoke collecting hood under the retracting state, the size of the smoke baffle plate is limited, the smoke baffle plate is not suitable for large-size smoke baffle plates, and the hidden smoke baffle plate smoke collecting hood is also huge in size.

Therefore, the applicant improves the above and applies for a patent, for example, a range hood disclosed in chinese patent application No. 201611246681.5, which includes a smoke collecting hood and smoke blocking plates disposed on the left and right sides of the smoke collecting hood and capable of ascending and descending relative to the smoke collecting hood, wherein the smoke blocking plates include a first smoke blocking plate capable of ascending and descending relative to the smoke collecting hood and a second smoke blocking plate disposed below the first smoke blocking plate, and the second smoke blocking plate is capable of rotating relative to the first smoke blocking plate when the first smoke blocking plate ascends and descends relative to the smoke collecting hood.

The range hood with the structure has the advantages that the size of the smoke baffle plate can be larger, and the height of the negative pressure area can be reduced to a greater extent, so that the oil smoke is gathered below the range hood earlier. Under the state that range hood is not used, keep off the cigarette board and can the rebound and fold in collection petticoat pipe below, occupy small, do not influence range hood's whole outward appearance. However, the turning angle of the second smoke baffle plate is limited by the lifting height of the first smoke baffle plate, the turning of the smoke baffle plate is realized by adopting belt transmission or chain transmission, and the turning motion is ineffective and the motion reliability is poor due to the fact that the belt transmission is easy to slip and the chain transmission is easy to wear and drop.

Disclosure of Invention

The first technical problem to be solved by the invention is to provide a range hood aiming at the defects of the prior art, and the smoke gathering effect is improved.

The second technical problem to be solved by the invention is to provide a range hood which is stable and reliable in movement and ensures normal use, aiming at the defects of the prior art.

The technical scheme adopted by the invention for solving the first technical problem is as follows: the utility model provides a range hood, includes collection petticoat pipe and smoke screen subassembly, smoke screen subassembly separates the smoke screen including setting up respectively in the collection petticoat pipe left and right sides, the first smoke screen that separates that can collect the petticoat pipe upset relatively and second, first smoke screen that separates extends its characterized in that around the axis of rotation that smoke screen and second separated the smoke screen:

the smoke barrier assembly also comprises a turnover mechanism for driving the first smoke barrier and the second smoke barrier to turn over, a lifting mechanism for driving the first smoke barrier and the second smoke barrier to lift, a first lifting plate rotationally connected with the first smoke barrier, and a second lifting plate rotationally connected with the second smoke barrier;

the turnover mechanism comprises a first turnover mechanism and a second turnover mechanism, the first turnover mechanism comprises a first linear driving module and a first sliding rod driven by the first linear driving module to lift, the second turnover mechanism comprises a second linear driving module and a second sliding rod driven by the second linear driving module to lift, the first sliding rod and the first smoke barrier are connected through a first connecting rod mechanism, and the second sliding rod and the second smoke barrier are connected through a second connecting rod mechanism;

the lifting mechanism comprises a third linear driving module and a third sliding rod driven by the third linear driving module to lift, and the third sliding rod is connected with the first lifting plate and the second lifting plate respectively.

The technical scheme adopted by the invention for solving the second technical problem is as follows: the first linear driving module comprises a first screw rod extending longitudinally, the first sliding rod extends transversely, one end of the first sliding rod is in threaded connection with the first screw rod, and the end part, far away from the first screw rod, of the first sliding rod is connected with the first connecting rod mechanism; the second linear driving module comprises a second screw rod extending longitudinally, the second sliding rod extends transversely, one end of the second sliding rod is in threaded connection with the second screw rod, and the end part, far away from the second screw rod, of the second sliding rod is connected with the second connecting rod mechanism; the third linear driving module comprises a lifting motor and a third screw driven to rotate by the lifting motor, and the third sliding rod is in threaded connection with the third screw.

According to one aspect of the invention, each turnover mechanism and each lifting mechanism are controlled by independent driving mechanisms, the first linear driving module further comprises a first motor, the second linear driving module further comprises a second motor, the first linear driving module is arranged on the first lifting plate, and the second linear driving module is arranged on the second lifting plate.

Preferably, first link mechanism includes first connecting rod, the second connecting rod of being connected with first slide bar rotation, second link mechanism includes third connecting rod, the fourth connecting rod of being connected with second slide bar rotation, the one end of second connecting rod and the one end rotation connection, the other end and the first smoke screen connection of keeping away from first slide bar of first connecting rod, the one end of fourth connecting rod and the one end rotation connection, the other end and the second smoke screen connection of keeping away from the second slide bar of third connecting rod.

According to another aspect of the invention, each turnover mechanism and each lifting mechanism are controlled by a common driving mechanism, each lifting mechanism further comprises a first bevel gear which is connected with a lifting motor and has a rotating shaft extending longitudinally, each first turnover mechanism further comprises a second bevel gear, a third bevel gear and a first synchronizing rod, each second turnover mechanism further comprises a fourth bevel gear, a fifth bevel gear and a second synchronizing rod, each first synchronizing rod extends transversely from left to right, each second bevel gear and each third bevel gear are respectively arranged at two ends of each first synchronizing rod, and each second bevel gear is meshed with each first bevel gear; the second synchronizing rod extends transversely left and right, a fourth bevel gear and a fifth bevel gear are respectively arranged at two ends of the second synchronizing rod, and the fourth bevel gear is meshed with the first bevel gear; the first turnover mechanism further comprises a sixth bevel gear meshed with the third bevel gear, and a first electromagnetic clutch arranged between the first screw and a shaft of the sixth bevel gear, and the second turnover mechanism further comprises a seventh bevel gear meshed with the fifth bevel gear, and a second electromagnetic clutch arranged between the second screw and a shaft of the seventh bevel gear; the elevating mechanism further includes a third electromagnetic clutch disposed between the third screw and the shaft of the first bevel gear.

In order to ensure that the two smoke screens can be turned over at 180 degrees between the horizontal inward direction and the horizontal outward direction, the hinge formed by the first sliding rod and the first connecting rod is provided with a first center, the hinge formed by the second connecting rod and the first smoke screen is provided with a second center, the hinge formed by the first smoke screen and the first lifting plate is provided with a third center, the horizontal distance between the first center and the third center is AD, the distance between the first center and the second center is AB, the distance between the second center and the third center is BC, and BC + AD is less than or equal to AB.

Preferably, the first sliding rod is in threaded connection with the first screw rod through the first nut sliding block, the second sliding rod is in threaded connection with the second screw rod through the second nut sliding block, and the third sliding rod is in threaded connection with the third screw rod through the third nut sliding block.

Compared with the prior art, the invention has the advantages that: by arranging the two smoke barriers which can independently operate in lifting and turning, the opening angle of the smoke barrier is not influenced by the lifting distance, and under the same descending distance, the rotation angle of the smoke barrier can be adjusted, namely the opening angles of the smoke barriers at two sides can be adjusted along with the diffusion degree of the oil smoke to two sides, so that the smoke collecting effect is better; by adopting the lifting fit of the screw rod and the sliding rod, the turnover mechanism and the lifting mechanism can stably run, are not easy to slip, have good mechanism stability and can ensure the normal use of the whole smoke barrier assembly; through setting up the clutch, only need a actuating mechanism just can realize separating the cigarette screen and can inwards overturn, can outwards overturn again, motion realizes simply, and spare part is less, can realize both sides separating the mutual independence of cigarette screen upset motion under an actuating mechanism's drive moreover, and mechanism motion stationarity is good.

Drawings

FIG. 1 is a schematic view of a range hood according to a first embodiment of the present invention in an initial state (with the smoke barrier horizontally inward);

FIG. 2 is a schematic view of a smoke barrier assembly of the range hood in accordance with the first embodiment of the present invention;

fig. 3 is a schematic view of the range hood according to the first embodiment of the present invention in an initial state (the smoke barrier is turned over by a certain angle);

FIG. 4 shows an initial state of the range hood according to the first embodiment of the present invention (smoke barrier horizontally outward);

FIG. 5 is a schematic view of the smoke barrier assembly of the first embodiment of the range hood of the present invention lowered to a certain position;

FIG. 6 is a schematic view of a second embodiment of the range hood according to the present invention in an initial state (the smoke barrier is turned over by a certain angle);

FIG. 7 is a schematic view of a smoke barrier assembly of a second embodiment of the range hood of the present invention;

FIG. 8 is a schematic view of a range hood according to a second embodiment of the present invention in an initial state (with the smoke barrier horizontally inward);

FIG. 9 is a schematic view of a range hood according to a second embodiment of the present invention in an initial state (with the smoke barrier horizontally outward);

fig. 10 is a schematic view of the range hood according to the second embodiment of the present invention with the smoke barrier assembly lowered to a certain position.

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 and 2, a range hood comprises a fume collecting hood 1, a fan frame 2 arranged above the fume collecting hood 1, and a fume isolating screen assembly.

The smoke screen assembly comprises a first smoke screen 31, a second smoke screen 32, a first turnover mechanism 33, a second turnover mechanism 34 and a lifting mechanism 35. The first smoke barrier 31 and the second smoke barrier 32 are respectively located at the left and right sides of the smoke collecting hood 1, and preferably, the first smoke barrier 31 and the second smoke barrier 32 are respectively the same as the smoke collecting hood 1 in height and depth in the front-back direction. In order to facilitate understanding of the present embodiment, the first housing 3313 of the first flipping mechanism 33 and the second housing 3413 of the second flipping mechanism 34 are hidden in fig. 2.

The first turnover mechanism 33 and the second turnover mechanism 34 are identical in structure and are symmetrically arranged. The first turnover mechanism 33 includes a first linear driving module 331 and a first sliding rod 332, the first linear driving module 331 includes a first motor 3311 disposed on the left side of the fan frame 2, a first screw 3312 driven by the first motor 3311 to rotate, and a first housing 3313, the first motor 3311 is fixed on the upper end of the first housing 3313, the first screw 3312 extends in the longitudinal direction and rotates around the longitudinal axis thereof, the lower end of the first screw 3312 is rotatably connected with the first housing 3313, and the upper end of the first screw 3312 can be connected with the first motor 3311. When the output shaft of the first motor 3311 extends transversely, it can be connected to the first screw 3312 through a commonly used transmission mechanism (vertical rotation), such as a worm gear structure, a bevel gear structure, etc., or the output shaft of the first motor 3311 can extend longitudinally, so that the output shaft of the first motor 3311 is directly connected to the first screw 3312. The first slide rod 332 extends in the lateral direction, and one end is screwed to the first screw 3312 via the first nut block 3321 and extends from the joint in a direction away from the blower housing 2. Therefore, when the first linear driving module 331 operates, the first sliding rod 332 can be driven to move up and down. The end (left end) of the first slide rod 332 far away from the first screw 3312 is rotatably connected with a first link 333, one end of the first link 333 far away from the first slide rod 332 is rotatably connected with a second link 334, and one end of the second link 334 far away from the first link 333 is connected to the first smoke barrier 31. The first link 333 and the second link 334 constitute a first link mechanism, and the first link mechanism may have more than two links.

When the first turnover mechanism 33 is operated, if the first smoke barrier 31 needs to be opened, the first slide rod 332 is driven to ascend, so that the first slide rod 332 drives the first connecting rod 333 to ascend, the second connecting rod 334 is enabled to turn over outwards at the joint with the first connecting rod 333, and the first smoke barrier 31 is driven to turn over outwards through the second connecting rod 334 to be opened.

The second turning mechanism 34 includes a second linear driving module 341 and a second sliding rod 342, the second linear driving module 341 includes a second motor 3411 disposed at the right side of the wind turbine frame 2, a second screw 341 driven by the second motor 3411 to rotate, and a second housing 3413, the second motor 3411 is fixed to the upper end of the second housing 3413, the second screw 3412 extends in the longitudinal direction and rotates around its longitudinal axis, the lower end of the second screw 3412 is rotatably connected to the first housing 3413, and the upper end of the second screw 3412 can be connected to the second motor 3411. When the output shaft of the second motor 3411 extends transversely, the output shaft can be connected to the second screw 3412 through a commonly used transmission mechanism (vertical steering), such as a worm gear structure, a bevel gear structure, or the like, or the output shaft of the second motor 3411 extends longitudinally, so that the output shaft of the second motor 3411 is directly connected to the second screw 3412. The second slide bar 342 extends in the lateral direction, and one end is screwed to the second screw 3412 through the second nut block 3421, and extends from the joint in a direction away from the blower housing 2. Therefore, when the second linear driving module 341 operates, the second sliding rod 342 can be driven to move up and down. A third link 343 is rotatably connected to an end (right end) of the second slide bar 342 far from the second screw 3412, a fourth link 344 is rotatably connected to an end of the third link 343 far from the second slide bar 342, and an end of the fourth link 344 far from the third link 343 is connected to the second smoke barrier 32. The third link 343 and the fourth link 344 constitute a second link mechanism, and the second link mechanism may have more than two links.

The lifting mechanism 35 includes a third linear driving module 351 and a third sliding rod 352, the third linear driving module 351 includes a lifting motor 3511, a third screw 3512 driven by the lifting motor 3511 to rotate, and a third housing 3513, the lifting motor 3511 is fixed at the upper end of the third housing 3513, the third screw 3512 extends in the longitudinal direction and rotates around its longitudinal axis, the lower end of the third screw 3512 is rotatably connected with the third housing 3513, and the upper end of the third screw 3512 can be connected with the lifting motor 3511. When the output shaft of the lifting motor 3511 extends transversely, the output shaft can be connected with the third screw 3512 through a commonly used transmission mechanism (vertical steering), such as a worm gear structure, an umbrella tooth structure and the like, or the output shaft of the lifting motor 3511 can extend longitudinally, so that the output shaft of the lifting motor 3511 can be directly connected with the third screw 3512. The third slide bar 352 extends in the lateral direction and is threadedly coupled to the third screw 3512 through a third nut runner 3521. Therefore, when the third linear driving module 351 is operated, the third slide bar 352 can be driven to move up and down.

The smoke barrier assembly further comprises a first lifting plate 36 and a second lifting plate 37, the first lifting plate 36 comprises a first baffle 361 extending longitudinally and close to the left side of the smoke collecting hood 1, a second baffle 362 extending transversely from the top end of the first baffle 361 to the direction close to the fan frame 2, and a third baffle 363 extending upwardly from the end of the second baffle 362 far from the first baffle 361, the bottom end of the first baffle 361 and the top end of the first smoke barrier 31 are rotatably connected through a first rotating shaft 38, and the first rotating shaft 38 extends in the front-back direction. The third baffle 363 is disposed on the left side of the fan frame 2. The first housing 3313 is provided on the third shield 363.

The second lifting plate 37 includes a fourth baffle 371 extending longitudinally near the right side of the smoke collecting hood 1, a fifth baffle 372 extending laterally at the top end of the fourth baffle 371 in the direction near the blower frame 2, and a sixth baffle 373 extending upwardly at the end of the fifth baffle 372 remote from the fourth baffle 371, the bottom end of the fourth baffle 371 and the top end of the second smoke barrier 32 being rotatably connected by a second rotating shaft 39, the second rotating shaft 39 extending in the front-rear direction. The sixth smoke barrier 373 is disposed on the right side of the blower frame 2. The second housing 3413 is disposed on the sixth baffle 373.

The left and right ends of the third sliding rod 352 are respectively connected and fixed with the third baffle 363 and the sixth baffle 373, so that the lifting motion of the third sliding rod 352 can drive the first lifting plate 36 and the second lifting plate 37 to lift. The first linear driving module 331, the first slide rod 332, the first connecting rod 333, the second connecting rod 334, the first lifting plate 36 and the first smoke barrier 31 form a slider-rocker mechanism, and similarly, the second linear driving module 341, the second slide rod 342, the third connecting rod 343, the fourth connecting rod 344, the second lifting plate 37 and the second smoke barrier 32 also form a slider-rocker mechanism.

When the range hood is closed, the first baffle 361 of the first lifting plate 36 can be positioned on the left side of the smoke collecting hood 1, the fourth baffle 371 of the second lifting plate 37 is positioned on the right side of the smoke collecting hood 1, the first smoke isolating screen 31 is positioned at a position which is turned inwards and horizontally positioned below the inside of the smoke collecting hood 1, and the second smoke isolating screen 32 is positioned at a position which is turned inwards and horizontally positioned below the inside of the smoke collecting hood 1, referring to fig. 1, so that the space can be saved.

When the range hood is started, the first turnover mechanism 33 and/or the second turnover mechanism 34 can be operated to drive the first smoke barrier 31 and/or the second smoke barrier 32 to turn outwards and open a certain angle, see fig. 3, and the range hood can be opened to a horizontal state, see fig. 4. When the oil smoke is large, the smoke gathering area can be enlarged by enlarging the turning angle of the smoke separating screens at the two sides, so that the oil smoke cannot escape from the two sides. The first smoke barrier 31 and the second smoke barrier 32 can be turned by 180 degrees between the horizontal inward direction and the horizontal outward direction, so that the size of the smoke gathering area can be controlled.

Because first tilting mechanism 33, second tilting mechanism 34 and elevating system 35 are independent, consequently, when first tilting mechanism 33, second tilting mechanism 34 moved, also can be through the operation of elevating system 35, make first lifter plate 36 and second lifter plate 37 descend, thereby make first separate smoke screen 31 and second separate smoke screen 32 descend, the distance of descending is controllable, see figure 5, thereby control the oil smoke to the diffusion degree of both sides in the lift process, the position that the smoke screen of both sides was located is lower, the oil smoke diffusion degree is less.

When only a single-side cooker is used, the smoke barrier far away from one side of the cooker can be vertical (in a non-working state), and the smoke barrier close to one side of the cooker is in a turning state, so that oil smoke can be prevented from escaping and energy can be saved; when the cookers on the two sides are used, the smoke-separating screens on the two sides can be controlled to turn over simultaneously, so that the oil smoke is prevented from escaping. Meanwhile, the first smoke barrier 31 and the second smoke barrier 32 can also play a role in guiding smoke.

Because the turnover mechanism and the lifting mechanism are independent, the first smoke barrier 31 and the second smoke barrier 32 can be controlled to turn over at any angle at any height and within an allowable range (180 degrees between the inward horizontal position and the outward horizontal position in the embodiment).

Example two

Referring to fig. 6 and 7, in the present embodiment, the difference from the first embodiment is that neither the first turnover mechanism 33 nor the second turnover mechanism 34 has a corresponding motor, but the lifting motor 3511 of the lifting mechanism 35 is shared. The first linear driving module 331 of the first turnover mechanism 33, the second linear driving module 341 of the second turnover mechanism 34, and the third linear driving module 351 of the lifting mechanism 35 are all disposed at the front side of the wind turbine frame 2, and the three linear driving modules are arranged in parallel and at intervals, and the third linear driving module 351 is located between the first linear driving module 331 and the second linear driving module 341.

The first lifting plate 36 and the second lifting plate 37 are both vertical single-plate structures, the bottom ends of the first lifting plate and the second lifting plate are respectively rotatably connected with the corresponding smoke barrier, and the top ends of the first lifting plate and the second lifting plate are respectively connected to two ends of the third sliding rod 352. The third slide bar 352 is now U-shaped.

An output shaft of a lifting motor 3511 of the lifting mechanism 35 extends longitudinally, and is provided with a first bevel gear 353, the first turnover mechanism 33 further comprises a second bevel gear 335, a third bevel gear 336 and a first synchronizing rod 337, and the second turnover mechanism 34 further comprises a fourth bevel gear 345, a fifth bevel gear 346 and a second synchronizing rod 347. The first synchronizing rod 337 extends laterally left and right, and the second bevel gear 335 and the third bevel gear 336 are respectively arranged at two ends of the first synchronizing rod 337; the second synchronizing bar 347 extends laterally left and right, and the fourth bevel gear 335 and the fifth bevel gear 346 are provided at both ends of the second synchronizing bar 347, respectively. The second bevel gear 335 meshes with the first bevel gear 353, and the fourth bevel gear 335 meshes with the first bevel gear 353.

The first turnover mechanism 33 further includes a sixth bevel gear 338 engaged with the third bevel gear 336, a first electromagnetic clutch 339 disposed between the shafts of the first screw 3312 and the sixth bevel gear 338, and the second turnover mechanism 34 further includes a seventh bevel gear 348 engaged with the fifth bevel gear 346, and a second electromagnetic clutch 349 disposed between the shafts of the second screw 3412 and the seventh bevel gear 348; the elevating mechanism 35 further includes a third electromagnetic clutch 354 disposed between the third screw 3512 and the shaft of the first bevel gear 353.

When the three electromagnetic clutches are closed, each screw can be connected with the shaft of the corresponding bevel gear in an attracting way, at the moment, the first sliding rod 332, the second sliding rod 342 and the third sliding rod 352 move upwards or downwards at the same speed, and the smoke screens at two sides and the lifting plate move upwards or downwards simultaneously; when the smoke barriers at two sides and the corresponding lifting plates descend to a required position, the third electromagnetic clutch 354 is disconnected at the moment, so that the shaft of the first bevel gear 353 and the third screw 3512 are not connected, namely the third screw 3512 stops rotating, and meanwhile, the first smoke barrier 31 or the second smoke barrier 32 can be controlled to turn over simultaneously (the first electromagnetic clutch 339 and the second electromagnetic clutch 349) or independently (the first electromagnetic clutch 339 and the second electromagnetic clutch 349) by controlling the opening and closing of the first electromagnetic clutch 339 and the second electromagnetic clutch 349.

The hinge formed by the first sliding rod 332 and the first connecting rod 333 has a first center a, the hinge formed by the second connecting rod 334 and the first smoke barrier 31 has a second center B, the hinge formed by the first smoke barrier 31 and the first lifting plate 36 has a third center C, the horizontal distance between the first center a and the third center C is AD, the distance between the first center a and the second center B is AB, and the distance between the second center B and the third center C is BC, so that when BC + AD is less than or equal to AB, the rotation angle of the first smoke barrier 31 can be changed from 0 ° to 180 °. The slider rocker mechanism on the right side is the same. The above conditions are also satisfied in the first embodiment.

In the initial state, the first lifting plate 36 and the second lifting plate 37 are respectively located at the left and right sides of the smoke collecting hood 1, and at this time, only the first turnover mechanism 33 and the second turnover mechanism 34 may be operated, so that the first smoke barrier 31 and the second smoke barrier 32 are in a state of being horizontally turned inwards (fig. 8), being turned outwards by a certain angle (fig. 6), or being turned outwards to be extremely horizontally turned outwards (fig. 9). When the smoke barrier assembly needs to be lowered, the third clutch 354 can be closed, so that the first lifting plate 36 and the second lifting plate 37 are driven to be lowered and can stay at a certain height (fig. 10). When the first smoke barrier 31 and the second smoke barrier 32 are lifted to different heights, the first smoke barrier 31 and the second smoke barrier 32 can be in different overturning states as shown in figures 6, 7 and 8.

Claims

1. The utility model provides a range hood, includes collection petticoat pipe (1) and separates the cigarette screen subassembly, it separates cigarette screen (32) including first separating cigarette screen (31) and the second that sets up respectively in collection petticoat pipe (1) left and right sides, collection petticoat pipe (1) upset relatively to separate the cigarette screen (32), first separating cigarette screen (31) and second and extending its characterized in that around the axis of rotation that separates cigarette screen (32):

the smoke screen assembly further comprises a turnover mechanism for driving the first smoke screen (31) and the second smoke screen (32) to turn over, a lifting mechanism (35) for driving the first smoke screen (31) and the second smoke screen (32) to lift, a first lifting plate (36) rotatably connected with the first smoke screen (31), and a second lifting plate (37) rotatably connected with the second smoke screen (32);

the turnover mechanism comprises a first turnover mechanism (33) and a second turnover mechanism (34), the first turnover mechanism (33) comprises a first linear driving module (331) and a first sliding rod (332) driven by the first linear driving module (331) to lift, the second turnover mechanism (34) comprises a second linear driving module (341) and a second sliding rod (342) driven by the second linear driving module (341) to lift, the first sliding rod (332) is connected with the first smoke screen (31) through a first connecting rod mechanism, and the second sliding rod (342) is connected with the second smoke screen (32) through a second connecting rod mechanism;

the lifting mechanism (35) comprises a third linear driving module (351) and a third sliding rod (352) driven by the third linear driving module (351) to lift, and the third sliding rod (352) is connected with the first lifting plate (36) and the second lifting plate (37) respectively.

2. The range hood of claim 1, wherein: the first linear driving module (331) comprises a first screw rod (3312) extending longitudinally, the first slide rod (332) extends transversely, one end of the first slide rod is in threaded connection with the first screw rod (3312), and the end, away from the first screw rod (3312), of the first slide rod (332) is connected with the first link mechanism; the second linear driving module (341) comprises a second screw (3412) extending longitudinally, the second sliding rod (342) extends transversely, one end of the second sliding rod is in threaded connection with the second screw (3412), and the end, away from the second screw (3412), of the second sliding rod (342) is connected with the second link mechanism; the third linear driving module (351) comprises a lifting motor (3511) and a third screw (3512) driven by the lifting motor (3511) to rotate, and the third sliding rod (352) is in threaded connection with the third screw (3512).

3. The range hood of claim 2, wherein: the first linear driving module (331) further comprises a first motor (3311), the second linear driving module (341) further comprises a second motor (3411), the first linear driving module (331) is arranged on the first lifting plate (36), and the second linear driving module (341) is arranged on the second lifting plate (37).

4. The range hood of claim 3, wherein: the first connecting rod mechanism comprises a first connecting rod (333) and a second connecting rod (334) which are rotatably connected with a first sliding rod (332), the second connecting rod mechanism comprises a third connecting rod (343) and a fourth connecting rod (344) which are rotatably connected with a second sliding rod (342), one end of the second connecting rod (334) is rotatably connected with one end, far away from the first sliding rod (332), of the first connecting rod (333), the other end of the second connecting rod is connected with a first smoke screen (31), one end of the fourth connecting rod (344) is rotatably connected with one end, far away from the second sliding rod (342), of the third connecting rod (343), and the other end of the fourth connecting rod is connected with a second smoke screen (32).

5. The range hood of claim 2, wherein: the lifting mechanism (35) further comprises a first bevel gear (353) which is connected with a lifting motor (3511) and has a rotating shaft extending longitudinally, the first turnover mechanism (33) further comprises a second bevel gear (335), a third bevel gear (336) and a first synchronizing rod (337), the second turnover mechanism (34) further comprises a fourth bevel gear (345), a fifth bevel gear (346) and a second synchronizing rod (347), the first synchronizing rod (337) extends transversely from left to right, the second bevel gear (335) and the third bevel gear (336) are respectively arranged at two ends of the first synchronizing rod (337), and the second bevel gear (335) is meshed with the first bevel gear (353); the second synchronizing rod (347) transversely extends left and right, a fourth bevel gear (345) and a fifth bevel gear (346) are respectively arranged at two ends of the second synchronizing rod (347), and the fourth bevel gear (345) is meshed with the first bevel gear (353); the first turnover mechanism (33) further comprises a sixth bevel gear (338) meshed with the third bevel gear (336), a first electromagnetic clutch (339) arranged between shafts of the first screw rod (3312) and the sixth bevel gear (338), the second turnover mechanism (34) further comprises a seventh bevel gear (348) meshed with the fifth bevel gear (346), and a second electromagnetic clutch (349) arranged between shafts of the second screw rod (3412) and the seventh bevel gear (348); the elevating mechanism (35) further includes a third electromagnetic clutch (354) provided between the third screw (3512) and the shaft of the first bevel gear (353).

6. The range hood of claim 5, wherein: the first connecting rod mechanism comprises a first connecting rod (333) and a second connecting rod (334) which are rotatably connected with a first sliding rod (332), the second connecting rod mechanism comprises a third connecting rod (343) and a fourth connecting rod (344) which are rotatably connected with a second sliding rod (342), one end of the second connecting rod (334) is rotatably connected with one end, far away from the first sliding rod (332), of the first connecting rod (333), the other end of the second connecting rod is connected with a first smoke screen (31), one end of the fourth connecting rod (344) is rotatably connected with one end, far away from the second sliding rod (342), of the third connecting rod (343), and the other end of the fourth connecting rod is connected with a second smoke screen (32).

7. The range hood of claim 4 or 6, wherein: the hinge formed by the first sliding rod (332) and the first connecting rod (333) is provided with a first center (A), the hinge formed by the second connecting rod (334) and the first smoke screen (31) is provided with a second center (B), the hinge formed by the first smoke screen (31) and the first lifting plate (36) is provided with a third center (C), the horizontal distance between the first center (A) and the third center (C) is AD, the distance between the first center (A) and the second center (B) is AB, the distance between the second center (B) and the third center (C) is BC, and BC + AD is less than or equal to AB.

8. The range hood of claim 2, wherein: the first sliding rod (332) is in threaded connection with the first screw rod (3312) through a first nut sliding block (3321), the second sliding rod (342) is in threaded connection with the second screw rod (3412) through a second nut sliding block (3421), and the third sliding rod (352) is in threaded connection with the third screw rod (3512) through a third nut sliding block (3521).