CN110906396A

CN110906396A - Fume exhaust fan

Info

Publication number: CN110906396A
Application number: CN201911083008.8A
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: 2020-03-24
Anticipated expiration: 2039-11-07
Also published as: CN110906396B

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, rotating shafts of the first smoke isolating screen and the second smoke isolating screen extend forwards and backwards, 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 fall, 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 slide bar, a first connecting rod mechanism connected between the first slide bar and the first smoke barrier, and a second connecting rod mechanism connected between the first slide bar and the second smoke barrier; the lifting mechanism comprises a second slide bar and a linear driving module capable of driving the first slide bar and the second slide bar to lift, and the second slide bar is connected with the first lifting plate and the second lifting plate respectively.

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 smoke baffles on the two sides of the scheme are independently driven, when the resistance on one side is large, the lifting or turning motion of the two sides is asynchronous, and particularly, when the motion of the two sides is seriously asynchronous, the function of the smoke baffle screen is ineffective, namely, the function of collecting smoke cannot be realized; the turnover of the smoke baffle plate is realized by adopting belt transmission or chain transmission, and the belt transmission is easy to slip, the chain transmission is easy to wear and drop, so that the turnover movement is ineffective, and the movement reliability is poor.

Disclosure of Invention

The technical problem to be solved by the invention is to provide the range hood aiming at the defects of the prior art, so that the smoke collecting effect is improved, the movement is stable and reliable, and the normal use is ensured.

The technical scheme adopted by the invention for solving the technical problems 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 fall, 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 slide bar, a first connecting rod mechanism connected between the first slide bar and the first smoke barrier, and a second connecting rod mechanism connected between the first slide bar and the second smoke barrier;

the lifting mechanism comprises a second slide bar and a linear driving module capable of driving the first slide bar and the second slide bar to lift, and the second slide bar is connected with the first lifting plate and the second lifting plate respectively.

In order to stabilize the movement mechanism and prevent slipping, the linear driving module comprises a driving motor and a screw driven to rotate by the driving motor, the screw extends in the longitudinal direction, and the first sliding rod and the second sliding rod are respectively in threaded connection with the screw. Any other known mechanism that can be driven linearly may be used.

In order to facilitate the simultaneous driving of the two sliding rods to perform different lifting, the screw is of a double-section screw structure, the screw comprises a first screw section located below and a second screw section located above, the first sliding rod is matched with the first screw section, and the second sliding rod is matched with the second screw section.

Further, the first screw section and the second screw section have the same rotating direction and different screw pitches.

In order to ensure that the turning speed of the smoke screen is higher than that of the second slide bar during ascending/descending, the screw pitch of the first screw section is P1, the screw pitch of the second screw section is P2, and P1 > P2 are satisfied.

In order to ensure that the smoke barriers at the left side and the right side are just turned to the vertical position when the second sliding rod is lowered to the lowest position; when the second slide bar rises to the highest position, the smoke barriers at the left side and the right side just turn over to the horizontal position, the maximum displacement of the turning slide bar and the second slide bar is respectively recorded as S1 and S2, and P1 is more than P2, and P1/P2 is S1/S2.

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

Preferably, first link mechanism includes and rotates first connecting rod, the second connecting rod of being connected with first slide bar one end, second link mechanism includes and rotates third connecting rod, the fourth connecting rod of being connected with the first slide bar other end, the one end of second connecting rod and the one end that first slide bar was kept away from to first connecting rod rotate to be connected, the other end is connected with first smoke screen, the one end of fourth connecting rod and the one end that first slide bar was kept away from to the third connecting rod rotate to be connected, the other end is connected with second smoke screen.

Compared with the prior art, the invention has the advantages that: the synchronous lifting and turning motion of the smoke barriers at the two sides can not cause the motion delay of one side relative to the other side, and the synchronous lifting and turning motion is always kept, so that the effect of collecting the smoke is realized; 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; the linkage of lifting and turning motion can be realized by adopting a screw rod with two sections of different screw pitches and only one driving motor, and the linkage has the advantages of few parts, low cost and stable and reliable motion.

Drawings

FIG. 1 is a schematic view of a range hood according to an embodiment of the present invention;

FIG. 2 is a schematic view of a smoke barrier assembly of the range hood according to the embodiment of the present invention;

fig. 3 is a schematic diagram of a turning state of the range hood according to the embodiment of the 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 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 turnover mechanism 33 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.

The turnover mechanism 33 includes a first slide bar 332, a first link mechanism and a second link mechanism, the first link mechanism includes a first link 333 and a second link 334, wherein one end of the first link 333 is rotatably connected to the first slide bar 332, one end of the first link 333 away from the first slide bar 332 is rotatably connected to the second link 334, and one end of the second link 334 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. The second link mechanism comprises a third link 343 and a fourth link 344, one end of the third link 343 is rotatably connected with the first slide bar 332, one end of the third link 343, which is far away from the first slide bar 332, is rotatably connected with the fourth link 344, and one end of the fourth link 344, which is far away 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.

In the present embodiment, the first link mechanism is disposed on the left side, the second link mechanism is disposed on the right side, the first link 333 is connected to the left end portion of the first slide bar 332, and the second link 343 is connected to the right end portion of the first slide bar 332.

When the turnover mechanism 33 is operated, if the first smoke barrier 31 and the second smoke barrier 32 need 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 outwards overturn at the joint of the first connecting rod 333, and the first smoke barrier 31 is driven to outwards overturn through the second connecting rod 334 to be opened. Similarly, the first sliding rod 332 simultaneously drives the second smoke barrier 32 to turn over and open through the second link mechanism.

The lifting mechanism 35 comprises a linear driving module 351 and a second sliding rod 352, the linear driving module 351 comprises a driving motor 3511, a screw rod 3512 driven by the driving motor 3511 to rotate, and a machine shell 3513, the driving motor 3511 is fixed at the upper end of the machine shell 3513, the screw rod 3512 extends in the longitudinal direction and rotates around the longitudinal axis of the screw rod, the lower end of the screw rod 3512 is rotatably connected with the machine shell 3513, and the upper end of the screw rod 3512 can be connected with the driving motor 3511. When the output shaft of the driving motor 3511 extends transversely, the output shaft can be connected with the 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 driving motor 3511 can extend longitudinally, so that the output shaft of the driving motor 3511 is directly connected with the screw 3512. The first slide 332 is screw-coupled at the middle thereof with the screw 3512 through a first nut block 3321, the second slide 352 extends in the lateral direction, and is screw-coupled at the middle thereof with the screw 3512 through a second nut block 3521. Therefore, when the linear driving module 351 is operated, the second sliding rod 352 can be driven to move up and down.

The smoke screen assembly further comprises a first lifting plate 36 and a second lifting plate 37, 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 36 and the second lifting plate 37 are respectively rotatably connected with the corresponding smoke screens, and the top ends of the first lifting plate and the second lifting plate are respectively connected to two ends of the second sliding rod 352. The second slide bar 352 is now in the shape of a downwardly opening U. The bottom end of the first lifting plate 36 is rotatably connected with the first smoke barrier 31 through a first rotating shaft 38, the bottom end of the second lifting plate 37 is rotatably connected with the second smoke barrier 32 through a second rotating shaft 39, and the first rotating shaft 38 and the second rotating shaft 39 extend in the front-rear direction.

In order to realize that the smoke barrier can rotate in the lifting process, the screw 3512 is a double-section screw structure, the double-section screw structure is provided with an upper screw section and a lower screw section which have the same rotating direction and different screw pitches, and the double-section screw structure comprises a first screw section 3514 positioned below and a second screw section 3515 positioned above, wherein the first sliding rod 332 is matched with the first screw section 3514, and the second sliding rod 354 is matched with the second screw section 3515. Assuming that the pitch of the first screw section 3514 is P1, the pitch of the second screw section 3515 is P2, and the displacements of the first slide bar 332 and the second slide bar 352, which pass through the first smoke barrier 31 and the second smoke barrier 32 from the horizontal state to the vertical state, are respectively denoted as S1 and S2, P1 and P2 should satisfy P1 > P2 and P1/P2 is denoted as S1/S2.

The reason why the distance between the first nut slider 3321 and the second nut slider 3521 is greater than the distance between the first nut slider 3326 and the second nut slider 2 is P1 & gt P2, so that the smoke barrier on the left side and the right side can rotate from the horizontal position to the vertical position only when the first nut slider 3321 moves downwards relative to the second nut slider 3521 in the descending process; during the lifting process, the first nut block 3321 moves upward relative to the second nut block 3521, and the left/right smoke barrier can rotate from the vertical position to the horizontal position.

The reason why P1/P2 is S1/S2 is to ensure that when the second nut slider 3521 is lowered to the lowest position, the smoke barriers on the left side and the right side are just turned to the vertical position; when the second nut sliding block 3521 rises to the highest position, the smoke barriers on the left side and the right side are just turned to the horizontal position.

This link gear, when the oil smoke is great, can increase through the upset angle that enlarges the cigarette screen that separates of both sides and hold together the cigarette region for the oil smoke can't escape from both sides. The maximum turnover angle of the smoke barrier at the left side and the right side is 90 degrees, namely from horizontal to vertical or from vertical to horizontal.

In an initial state, referring to fig. 3, the first smoke barrier 31 and the second smoke barrier 32 are in a horizontal state, when a cigarette needs to be gathered, the linear driving module 351 is started, the second slide bar 352 descends, the first lifting plate 36 and the second lifting plate 37 descend, meanwhile, the first slide bar 332 drives the first connecting rod 333 and the third connecting rod 343 to descend, the second connecting rod 334 turns inwards at the joint with the first connecting rod 333, the fourth connecting rod 344 turns inwards with the third connecting rod 343, the first smoke barrier 31 is driven to turn inwards through the second connecting rod 334 until the first smoke barrier 31 is vertical, and the second smoke barrier 32 is driven to turn inwards through the fourth connecting rod 344 until the second smoke barrier 32 is vertical, referring to fig. 1.

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 (33) 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 (33) comprises a first slide bar (332), a first link mechanism connected between the first slide bar (332) and the first smoke screen (31), and a second link mechanism connected between the first slide bar (332) and the second smoke screen (32);

the lifting mechanism (35) comprises a second sliding rod (352) and a linear driving module (351) capable of driving the first sliding rod (332) and the second sliding rod (352) to lift, and the second 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 linear driving module (351) comprises a driving motor (3511), a screw rod (3512) driven by the driving motor (3511) to rotate, the screw rod (3512) extends in the longitudinal direction, and the first sliding rod (332) and the second sliding rod (352) are respectively in threaded connection with the screw rod (3512).

3. The range hood of claim 2, wherein: the screw rod (3512) is two sections screw rod structure, screw rod (3512) are including the first screw rod section (3514) that are located the below and the second screw rod section (3515) that are located the top, first slide bar (332) and first screw rod section (3514) cooperation, second slide bar (352) and second screw rod section (3515) cooperation.

4. The range hood of claim 3, wherein: the first screw section (3514) and the second screw section (3515) have the same rotation direction and different screw pitches.

5. The range hood of claim 4, wherein: the pitch of the first screw section (3514) is P1, the pitch of the second screw section (3515) is P2, and P1 > P2 are satisfied.

6. The range hood of claim 5, wherein: the maximum displacement of the first slide bar (332) and the second slide bar (352) is respectively recorded as S1 and S2, and P1 > P2 and P1/P2 are S1/S2.

7. The range hood of claim 2, wherein: the first sliding rod (332) is in threaded connection with the screw rod (3512) through a first nut slider (3321), and the second sliding rod (352) is in threaded connection with the screw rod (3512) through a second nut slider (3521).

8. The range hood according to any one of claims 1 to 7, wherein: the first connecting rod mechanism comprises a first connecting rod (333) and a second connecting rod (334) which are rotatably connected with one end of a first sliding rod (332), the second connecting rod mechanism comprises a third connecting rod (343) and a fourth connecting rod (334) which are rotatably connected with the other end of the first sliding rod (332), 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 first sliding rod (332), of the third connecting rod (343), and the other end of the fourth connecting rod is connected with a second smoke screen (32).