CN110925846A

CN110925846A - Smoke guide plate assembly and range hood with smoke guide plate assembly

Info

Publication number: CN110925846A
Application number: CN201911390141.8A
Authority: CN
Inventors: 何勇; 王磊; 刘杰
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-03-27
Anticipated expiration: 2039-12-30
Also published as: CN110925846B

Abstract

The invention discloses a smoke guide plate assembly which comprises a main smoke guide plate, wherein at least one side surface of the main smoke guide plate is provided with a group of auxiliary smoke guide plates capable of overturning relative to the main smoke guide plate, each group of auxiliary smoke guide plates comprise a first auxiliary smoke guide plate and a second auxiliary smoke guide plate positioned below the first auxiliary smoke guide plate, the first auxiliary smoke guide plate is provided with first filter meshes, the second auxiliary smoke guide plate is provided with second filter meshes, when the first auxiliary smoke guide plate and the second auxiliary smoke guide plate are positioned at a first position, the first filter meshes and the second filter meshes are staggered, and when the first auxiliary smoke guide plate and the second auxiliary smoke guide plate are positioned at a second position, the first filter meshes and the second filter meshes are at least partially overlapped. A range hood that uses above fume deflector subassembly is still disclosed. Compared with the prior art, the invention has the advantages that: the relative position change of the filter mesh holes on the two auxiliary smoke guide plates is realized by turning to different positions, so that the switching of air inlet forms is realized, and the oil smoke absorption effect and the filtering effect are improved.

Description

Smoke guide plate assembly and range hood with smoke guide plate assembly

Technical Field

The invention relates to an oil fume purification device, in particular to a smoke guide plate assembly and a range hood applying the smoke guide plate assembly.

Background

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

The existing top suction type range hood is provided with a smoke guide plate and a filter screen below an air inlet in order to improve the oil smoke suction and filtering effects, and when a fan of the range hood is in an action state, the back of the smoke guide plate can form negative pressure, so that surrounding oil smoke enters the range hood to achieve a good oil smoke suction effect, and meanwhile, the filter screen plays a role in filtering.

The range hood disclosed in the chinese patent application No. 201720682454.0 comprises a smoke collection chamber, a filter assembly and a driving device, wherein the filter assembly is disposed in the smoke collection chamber, the filter assembly comprises two movable smoke guide plates and a plate member located between the two movable smoke guide plates, the two movable smoke guide plates are configured to move under the driving of the driving device, the filter assembly is configured to switch between a first mode and a second mode by moving the two movable smoke guide plates, when the filter assembly is in the first mode, the two movable smoke guide plates and the smoke collection cavity are respectively provided with an air inlet channel at intervals, when the filter assembly is in the second mode, the air inlet channel is at least partially sealed by the corresponding movable smoke guide plate, the smoke guide plate further comprises an upper side filter screen which is obliquely arranged from front to back, and when the filter assembly is in the second mode, the rear end of the upper side filter screen is connected with the front end of the filter assembly.

However, the existing range hood is often only in a single 'plate suction' mode, and the switching between the 'plate suction' mode and the 'net suction' mode cannot be performed according to the concentration of the oil smoke, so that the optimal oil smoke suction and filtering effects cannot be achieved.

Disclosure of Invention

The first technical problem to be solved by the present invention is to provide a smoke guide plate assembly, which can switch air intake modes and improve oil smoke absorption and filtering effects, in view of the above-mentioned deficiencies in the prior art.

The second technical problem to be solved by the invention is to provide a range hood with the smoke guide plate component.

The technical scheme adopted by the invention for solving the first technical problem is as follows: a smoke guide plate assembly comprises a main smoke guide plate and is characterized in that: at least one side of leading cigarette board is provided with the vice cigarette board of leading of a set of ability relative leading cigarette board upset, and the vice cigarette board of leading of every group includes that first pair leads the cigarette board and is located the vice cigarette board of leading of second that first pair leads the cigarette board below, first filter mesh has been seted up on the first pair leads the cigarette board, the second filters the mesh has been seted up on the vice cigarette board of leading of second, when first pair is led cigarette board and the vice cigarette board of leading of second and is in the primary importance, first filter mesh and second filter the mesh and stagger, and first pair is led cigarette board and vice cigarette board of leading of second and is in the second place, first filter mesh and second filter the mesh and overlap at least partially.

Make for vice turn over and relative displacement of leading cigarette board for filter mesh's relative position changes, and realize the switching of air inlet form, first vice cigarette board is led through first axis of rotation and leading cigarette board swing joint, thereby make first vice cigarette board of leading can rotate and reciprocate relatively leading cigarette board, the vice cigarette board of leading of second is led through second axis of rotation and is connected with leading cigarette board rotation.

Preferably, be provided with linking bridge on the leading cigarette board, the last mounting hole of having seted up of linking bridge, the mounting hole extends from top to bottom, first axis of rotation and second axis of rotation all penetrate in the mounting hole, first axis of rotation rotates with linking bridge to be connected and can reciprocate along the mounting hole, the second axis of rotation then rotates with linking bridge to be connected.

In order to realize the switching of air inlet forms for the convenience of overturning, the first filter meshes on the first pair of smoke guide plates and the second filter meshes on the second pair of smoke guide plates are all arranged in rows, each row of filter meshes is parallel to the rotating shaft on the corresponding pair of smoke guide plates, the row spacing between two adjacent rows of first filter meshes on the first pair of smoke guide plates is equal, the row spacing between two adjacent rows of second filter meshes on the second pair of smoke guide plates is equal, and the row spacing between the first filter meshes on the first pair of smoke guide plates and the row spacing between the second filter meshes on the second pair of smoke guide plates are equal.

According to one aspect of the present invention, the wall thickness of the second sub-smoke guide plate and the first sub-smoke guide plate at the contact position is δ, when the first sub-smoke guide plate and the second sub-smoke guide plate are turned over to the maximum angle θ, the straight line distance between the projection of the center of the first rotating shaft of the first sub-smoke guide plate and the projection of the center of the second rotating shaft of the second sub-smoke guide plate on the interface of the two sub-smoke guide plates is denoted as an offset distance L, and the first filter mesh hole and the second filter mesh hole are circular holes with a radius R, and the following relationships are satisfied: l is δ tan θ,

according to another aspect of the present invention, the wall thickness of the second sub-smoke guide plate at the contact position with the first sub-smoke guide plate is δ, when the first sub-smoke guide plate and the second sub-smoke guide plate are turned over to the maximum angle θ, the straight line distance between the projection of the center of the first rotating shaft of the first sub-smoke guide plate and the projection of the center of the second rotating shaft of the second sub-smoke guide plate on the interface of the two sub-smoke guide plates is denoted as an offset distance L, the first filter mesh holes and the second filter mesh holes are square holes or waist-shaped holes, the shortest distance between any two adjacent rows of first filter mesh holes on the first sub-smoke guide plate or any two adjacent rows of second filter mesh holes on the second sub-smoke guide plate is d, and the above parameters satisfy the following relations: l is δ tan θ,

in order to facilitate the action of automatically driving the auxiliary smoke guide plates, a driving mechanism for driving each group of auxiliary smoke guide plates to turn is fixedly arranged on the main smoke guide plate, and the output end of the driving mechanism penetrates through the first auxiliary smoke guide plate to be connected with the second auxiliary smoke guide plate.

The technical scheme adopted by the invention for solving the second technical problem is as follows: the utility model provides an be applied to and have said range hood of leading cigarette board subassembly, includes the collection petticoat pipe, collection petticoat pipe inboard forms the collection smoke chamber of upwards sunken, its characterized in that: the smoke guide plate component is arranged in the smoke collection cavity.

In order to guide the oil smoke to reduce escape, the left side and the right side of the main smoke guide plate are respectively provided with a group of auxiliary smoke guide plates.

Compared with the prior art, the invention has the advantages that: set up the vice smoke deflector group that can lead the smoke deflector upset relatively in the side of leading the smoke deflector, realize two vice smoke deflector and go up the relative position change of filter mesh through the upset to different positions to realize the switching of air inlet form, improve oil absorption cigarette effect and filter effect, can also reach energy-conserving purpose in addition.

Drawings

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

FIG. 2 is a schematic view of a range hood in a second state according to a first embodiment of the present invention;

FIG. 3 is a side view of a smoke guide assembly of the range hood of FIG. 1;

FIG. 4 is a top view of a smoke guide assembly of the range hood of FIG. 1;

FIG. 5 is a side view of a smoke guide assembly of the range hood of FIG. 2;

FIG. 6 is a top view of a smoke guide assembly of the range hood of FIG. 2;

FIG. 7 is a schematic view of a secondary smoke guide of the smoke guide assembly of FIG. 5;

FIG. 8 is an enlarged view of a portion I of FIG. 7;

fig. 9 is a side view of a smoke guide plate assembly of a second embodiment of the range hood of the present invention in a first state;

fig. 10 is a top view of a smoke guide plate assembly of a second embodiment of the range hood of the present invention in a first state;

fig. 11 is a side view of a smoke guide plate assembly of a second embodiment of the range hood of the present invention in a second state;

fig. 12 is a side view of a smoke guide plate assembly of a second embodiment of the range hood of the present invention in a second state;

fig. 13 is a side view of a third embodiment of a smoke guide plate assembly of a range hood of the present invention in a first state;

fig. 14 is a top view of a third embodiment of a smoke guide plate assembly of a range hood of the present invention in a first state;

fig. 15 is a side view of a third embodiment of a smoke guide plate assembly of a range hood of the present invention in a second state;

fig. 16 is a side view of a third embodiment of the extractor hood according to the present invention with the smoke guide plate assembly in the second 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 and 2, a range hood, which is a top-suction range hood, includes a fume collecting hood 1 and a fan frame 2 disposed above the fume collecting hood 1, a fume collecting chamber 11 recessed upwards is formed inside the fume collecting hood 1, and a fume guide plate assembly 3 is disposed in the fume collecting chamber 11.

Referring to fig. 3 to 6, the smoke guide plate assembly 3 includes a main smoke guide plate 31, a first auxiliary smoke guide plate 32 and a second auxiliary smoke guide plate 33, the first auxiliary smoke guide plate 32 and the second auxiliary smoke guide plate 33 form a set of auxiliary smoke guide plates, and a set of auxiliary smoke guide plates are respectively disposed on left and right sides of the main smoke guide plate 31. The first sub cigarette guiding plate 32 is rotatably connected to the side surface of the main cigarette guiding plate 31 by a first rotating shaft 321, the second sub cigarette guiding plate 33 is rotatably connected to the side surface of the main cigarette guiding plate 31 by a second rotating shaft 331, and the first rotating shaft 321 and the second rotating shaft 331 both extend in the front-rear direction. The main smoke guiding plate 31 plays a role of guiding the flow. The first pair of smoke guide plates 32 is located above the second pair of smoke guide plates 33, and preferably, the first pair of smoke guide plates 32 and the second pair of smoke guide plates 33 are both flat and parallel to each other. Any one of the left side and the right side of the main smoke guiding plate 31 and the front end and the rear end of the main smoke guiding plate are respectively provided with a connecting bracket 311, the connecting bracket 311 is provided with a mounting hole 312, and the mounting hole 312 is a waist-shaped hole extending up and down. The first and second rotating

shafts

321 and 331 are inserted into the mounting hole 312. The first rotation shaft 321 is rotatably connected to the connection bracket 311 and is movable up and down along the mounting hole 312, and the second rotation shaft 322 is rotatably connected to the connection bracket 311.

The main smoke guiding plate 31 is fixedly provided with a driving mechanism 34, and preferably, the driving mechanism 34 is arranged on the top surface of the main smoke guiding plate 31. In the present embodiment, the driving mechanism 34 is an electric push rod, and an output end thereof extends in the left-right direction. Alternatively, other linear drive modules may be used. The output end of the driving mechanism 34 passes through the first sub-smoke guide plate 32 and is connected with the second sub-smoke guide plate 33, so that the second sub-smoke guide plate 33 rotates relative to the main smoke guide plate 31 under the driving of the driving mechanism 34, and the rotation angle is set to be 0-60 degrees. When the second sub-cigarette guide plate 33 rotates, since the first sub-cigarette guide plate 32 and the second sub-cigarette guide plate 33 contact each other, the first sub-cigarette guide plate 32 is brought to rotate and move up and down at the same time.

The first pair of smoke guide plates 32 is provided with first filter mesh holes 322, and the second pair of smoke guide plates 33 is provided with second filter mesh holes 332. Can be through setting up oil smoke concentration sensor, real-time supervision oil smoke concentration, and then according to the size of oil smoke concentration, the operation of intelligent control actuating mechanism 34 to the logical of filter mesh is closed on realizing two vice smoke deflector, thereby can carry out the switching of air intake structural style according to the size of oil smoke concentration automatically. When turned upwards to a proper position (e.g., 60 ° relative to horizontal), the first filter mesh openings 322 of the first sub-smoke guide plate 32 and the second filter mesh openings 332 of the second sub-smoke guide plate 33 are at least partially aligned and in a "mesh sucking" state, and when turned downwards to a proper position (e.g., horizontal), the first filter mesh openings 322 of the first sub-smoke guide plate 32 and the second filter mesh openings 332 of the second sub-smoke guide plate 33 are completely staggered and in a "plate sucking" state. During the above movement, the centers of the first and second rotating

shafts

321 and 322 are always maintained on the same vertical line.

In order to make the switching of the air intake form by the rotation and the up-and-down movement of the sub-smoke guide plate, the arrangement of the first filtering meshes 322 on the first sub-smoke guide plate 32 and the second filtering meshes 332 on the second sub-smoke guide plate 33 needs to satisfy the following conditions. The filter mesh holes on each auxiliary smoke guide plate are arranged in rows, and each row of filter mesh holes is parallel to the rotating shaft on the corresponding auxiliary smoke guide plate. The distance between two adjacent rows of filter mesh holes just can satisfy that when two pairs of smoke guide plates overturn to a specified position (maximum angle), the first filter mesh holes 322 on the first pair of smoke guide plates 32 and the second filter mesh holes 332 on the second pair of smoke guide plates 33 are at least partially overlapped, preferably completely overlapped, at this time, the first filter mesh holes 322 on the first pair of smoke guide plates 32 and the second filter mesh holes 332 on the second pair of smoke guide plates 33 are at least partially communicated, preferably completely communicated, each group of pair of smoke guide plates are all in a net suction state, that is, when oil smoke flows through, the oil smoke sequentially passes through the second filter mesh holes 332 on the second pair of smoke guide plates 33 and the first filter mesh holes 322 on the first pair of smoke guide plates 32.

In this embodiment, the first filtering mesh holes 322 on the first sub-smoke guiding plate 32 and the second filtering mesh holes 332 on the second sub-smoke guiding plate 33 are both circular, the radius is preferably 2-10 mm, and the aperture ratio is preferably 50-90%. The distance between any two adjacent rows of the first filter meshes 322 on the first auxiliary smoke guide plate 32 is equal, the row distance between any two adjacent rows of the second filter meshes 332 on the second auxiliary smoke guide plate 33 is equal, the distance between the first filter meshes 322 on the first auxiliary smoke guide plate 32 and the row distance between the second filter meshes 332 on the second auxiliary smoke guide plate 33 are also equal, and the row distance between the first filter meshes 322 on the first auxiliary smoke guide plate 32 and the row distance between the second filter meshes 332 on the second auxiliary smoke guide plate 33 are equal. Referring to fig. 7 and 8, the wall thickness of the contact position of the second sub-smoke guide plate 33 and the first sub-smoke guide plate 32 is δ, when the first sub-smoke guide plate 32 and the second sub-smoke guide plate 33 are turned over to the maximum angle, the straight line distance between the projection of the center of the first rotating shaft 321 of the first sub-smoke guide plate 32 and the projection of the center of the second rotating shaft 332 of the second sub-smoke guide plate 33 on the two sub-smoke guide plate interfaces is denoted as an offset distance L, and the maximum rotating angle of the first sub-smoke guide plate 32 and the second sub-smoke guide plate 33 is θ, and the relationship between the three parameters is as follows:

L＝δtanθ

when the first and second filter mesh holes 322 and 332 are circular holes, the radius of each filter mesh hole is R, and

L＝4nR

n＝1,2,3…。

this can result in:

when the rotation angle θ of the first sub-smoke guide plate 32 and the second sub-smoke guide plate 33 is 0, the first filter mesh holes 322 on the first sub-smoke guide plate 32 and the second filter mesh holes 332 on the second sub-smoke guide plate 33 are completely staggered, and the offset distance L is 0.

When the rotation angle theta of the first auxiliary smoke guide plate 32 and the second auxiliary smoke guide plate 33 reaches the maximum value, optionally theta_maxThe offset distance L between the first sub-smoke guide plate 32 and the second sub-smoke guide plate 33 may be 40 to 60 degrees.

Specifically, when the concentration of the oil smoke is smaller than the preset value, the driving mechanism 34 drives the second sub-smoke guide plate 33 to turn upwards, so that each set of sub-smoke guide plates forms a certain angle, such as 60 °, with the main smoke guide plate 31, the first filter mesh holes 322 on the first sub-smoke guide plate 32 and the second filter mesh holes 332 on the second sub-smoke guide plate 33 are at least partially overlapped and communicated, so that the oil smoke sequentially flows through the filter mesh holes of the two communicated sub-smoke guide plates 32, so that the set of sub-smoke guide plates are in a "net suction" structure, and form a large smoke guide assembly with the middle main smoke guide plate, and the "net suction" structure ensures a good filtering effect of the smoke guide plate assembly 3, and the existence of the middle smoke guide plate 31 also ensures a smoke suction effect thereof, see fig. 5 and 6.

When the concentration of the oil smoke is greater than the preset value, the driving mechanism 34 drives the second sub-smoke guide plate 33 to turn downwards, so that each group of sub-smoke guide plates is in a horizontal state, the first filter mesh holes 322 on the first sub-smoke guide plate 32 and the second filter mesh holes 332 on the second sub-smoke guide plate 33 are completely staggered, the oil smoke flows to the outer side of the smoke guide plate assembly 3 along the lower surface of the second sub-smoke guide plate 33 (leftwards along the second sub-smoke guide plate 33 on the left side and rightwards along the second sub-smoke guide plate 33 on the right side), and flows upwards after reaching the end part of the second sub-smoke guide plate 33 far away from the main smoke guide plate 31, so that one group of sub-smoke guide plates becomes a plate suction structure, and forms a large smoke guide assembly with the middle main smoke guide plate 31, a certain negative pressure far away from the back of the oil smoke is reduced, and good oil. Therefore, the purpose of reducing the smoke leakage is achieved without increasing the rotating speed of the fan, and the energy is saved.

Example two

Referring to fig. 9 to 12, in this embodiment, the difference from the first embodiment is that the first filter mesh holes 322 on the first sub-smoke guiding plate 32 and the second filter mesh holes 332 on the second sub-smoke guiding plate 33 are both square, and the shortest distance d (row pitch) between any two adjacent rows of the first filter mesh holes 322 on the first sub-smoke guiding plate 32 or any two adjacent rows of the second filter mesh holes 332 on the second sub-smoke guiding plate 33 should satisfy the following relation:

EXAMPLE III

Referring to fig. 13 to fig. 16, in this embodiment, the difference from the first embodiment is that the first filter mesh holes 322 on the first sub-smoke guiding plate 32 and the second filter mesh holes 332 on the second sub-smoke guiding plate 33 are both waist-shaped holes, and the shortest distance d between any two adjacent rows of the first filter mesh holes 322 on the first sub-smoke guiding plate 32 or any two adjacent rows of the second filter mesh holes 332 on the second sub-smoke guiding plate 33 should satisfy the following relation:

the filter meshes with other shapes and the space between two adjacent rows need to satisfy the relationship.

Claims

1. A smoke guide plate assembly comprising a main smoke guide plate (31), characterized in that: at least one side of leading cigarette board (31) is provided with the vice cigarette board of leading of a set of ability relative leading cigarette board (31) upset, and the vice cigarette board of leading of every group includes that first pair leads cigarette board (32) and is located the vice cigarette board (33) of leading of second of first pair cigarette board (32) below, first filtration mesh (322) have been seted up on first pair cigarette board (32), second filtration mesh (332) have been seted up on the vice cigarette board (33) of leading of second, first pair is led cigarette board (32) and second and is vice when leading cigarette board (33) in the first position, first filtration mesh (322) and second filtration mesh (332) stagger, and first pair is led cigarette board (32) and second and is vice when leading cigarette board (33) in the second position, first filtration mesh (322) and second filtration mesh (332) at least partially overlap.

2. The smoke guide plate assembly of claim 1, wherein: the first auxiliary smoke guide plate (32) is movably connected with the main smoke guide plate (31) through a first rotating shaft (321), so that the first auxiliary smoke guide plate (32) can rotate and move up and down relative to the main smoke guide plate (31), and the second auxiliary smoke guide plate (33) is rotatably connected with the main smoke guide plate (31) through a second rotating shaft (332).

3. The smoke guide plate assembly of claim 2, wherein: be provided with linking bridge (311) on leading cigarette board (31), mounting hole (312) have been seted up on linking bridge (311), mounting hole (312) extend from top to bottom, first axis of rotation (321) and second axis of rotation (331) all penetrate in mounting hole (312), first axis of rotation (321) rotate with linking bridge (311) and be connected and can reciprocate along mounting hole (312), second axis of rotation (331) then rotate with linking bridge (311) and be connected.

4. A smoke guide plate assembly according to claim 2 or 3, wherein: the first filter meshes (322) on the first pair of smoke guide plates (32) and the second filter meshes (332) on the second pair of smoke guide plates (33) are all arranged in rows, each row of filter meshes is parallel to the rotating shaft on the corresponding pair of smoke guide plates, the row spacing between two adjacent rows of first filter meshes (322) on the first pair of smoke guide plates (32) is equal, the row spacing between two adjacent rows of second filter meshes (332) on the second pair of smoke guide plates (33) is equal, and the row spacing of the first filter meshes (322) on the first pair of smoke guide plates (32) is equal to the row spacing of the second filter meshes (332) on the second pair of smoke guide plates (33).

5. The smoke guide plate assembly of claim 4, wherein: the wall thickness of the second pair of smoke guide plates (33) and the contact position of the first pair of smoke guide plates (32) is delta, when the first pair of smoke guide plates (32) and the second pair of smoke guide plates (33) turn over to the maximum angle theta, the straight line distance between the projection of the center of the first rotating shaft (321) of the first pair of smoke guide plates (32) and the projection of the center of the second rotating shaft (332) of the second pair of smoke guide plates (33) on the interface of the two pair of smoke guide plates is recorded as the offset distance L, the first filter mesh holes (322) and the second filter mesh holes (332) are circular holes with the radius R, and the parameters meet the following relations: l is δ tan θ,

6. according to claim 4The smoke guide plate component is characterized in that: the wall thickness of the contact position of the second auxiliary smoke guide plate (33) and the first auxiliary smoke guide plate (32) is delta, when the first auxiliary smoke guide plate (32) and the second auxiliary smoke guide plate (33) are turned to a maximum angle theta, the straight line distance between the projection of the center of the first rotating shaft (321) of the first auxiliary smoke guide plate (32) and the projection of the center of the second rotating shaft (332) of the second auxiliary smoke guide plate (33) on the interface of the two auxiliary smoke guide plates is recorded as an offset distance L, the first filter mesh holes (322) and the second filter mesh holes (332) are square holes or waist-shaped holes, the shortest distance between any two adjacent rows of first filter mesh holes (322) on the first auxiliary smoke guide plate (32) or any two adjacent rows of second filter mesh holes (332) on the second auxiliary smoke guide plate (33) is d, and the parameters meet the following relations: l is δ tan θ,

7. the smoke guide plate assembly of claim 1, wherein: the main cigarette guiding plate (31) is fixedly provided with a driving mechanism (34) used for driving each group of auxiliary cigarette guiding plates to overturn, and the output end of the driving mechanism (34) penetrates through the first auxiliary cigarette guiding plate (32) to be connected with the second auxiliary cigarette guiding plate (33).

8. A range hood applying the smoke guide plate assembly as claimed in any one of claims 1 to 7, comprising a smoke collecting hood (1), wherein a smoke collecting cavity (11) which is concave upwards is formed inside the smoke collecting hood (1), and the range hood is characterized in that: the smoke guide plate component is arranged in the smoke collection cavity (11).

9. The range hood of claim 8, wherein: the left side and the right side of the main smoke guide plate (31) are respectively provided with a group of auxiliary smoke guide plates.