CN216159110U

CN216159110U - Fume exhaust fan

Info

Publication number: CN216159110U
Application number: CN202121754249.3U
Authority: CN
Inventors: 罗家胜; 潘叶江
Original assignee: Vatti Co Ltd
Current assignee: Vatti Co Ltd
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2022-04-01
Anticipated expiration: 2031-07-30

Abstract

The utility model discloses a range hood, comprising: the air cabinet assembly comprises a box body and a fan with an air inlet; the smoke collecting cover is arranged at the bottom of the box body and communicated with the box body, and is provided with at least one smoke inlet through which smoke passes; the rectification subassembly, it set up in the box and be close to the air intake is arranged, the rectification subassembly includes cowling panel and guide plate, the cowling panel is located the below of air intake, and its relative both ends are connected respectively or the butt the left and right sides wall of box be equipped with a plurality of comb gas portions that supply the oil smoke to pass through on the cowling panel, the guide plate set up in the top of air intake is connected the cowling panel, the guide plate is used for with greasy dirt water conservancy diversion extremely on it the cowling panel. The range hood disclosed by the utility model can rectify airflow, reduce the generation of turbulent flow and improve the oil separation degree, and solves the problem that oil is easy to hang on the top of the box body.

Description

Fume exhaust fan

Technical Field

The utility model relates to the technical field of range hoods, in particular to a range hood.

Background

In order to improve the smoking effect of the household range hood, one of the currently used schemes is to perform partition control, and the range hood is changed into a double-cavity structure from a single cavity. The existing range hood with a double-cavity structure has the advantages that the movable turning plate is generally arranged outside the smoke collecting hood, the movable turning plate is controlled left and right, double cavities are double controlled, the size of a left air inlet and a right air inlet is generally set to be the same, the fan is not arranged in the middle of the box body in actual installation, so that the air volume and the noise of the left cavity and the right cavity are different, the smoking effect of the left cavity and the right cavity is inconsistent, and the smoking effect of one cavity is poor.

In addition, the oil circuit of the top plate of the box body can be ignored frequently, and the upper edge of the box body coaming connected with the top plate is easy to hang oil, so that the phenomenon that oil drips to a cooking bench exists after the range hood is used for a period of time.

Disclosure of Invention

The utility model aims to solve at least one of the problems in the prior art to a certain extent, and therefore the utility model provides the range hood which can rectify airflow, reduce the generation of turbulent flow and improve the oil separation degree and also solves the problem that oil is easy to hang on the top of a box body.

According to the range hood that provides above-mentioned, it realizes through following technical scheme:

a range hood, comprising: the air cabinet assembly comprises a box body and a fan with an air inlet; the smoke collecting cover is arranged at the bottom of the box body and communicated with the box body, and is provided with at least one smoke inlet through which smoke passes; the rectification subassembly, it set up in the box and be close to the air intake is arranged, the rectification subassembly includes cowling panel and guide plate, the cowling panel is located the below of air intake, and its relative both ends are connected respectively or the butt the left and right sides wall of box be equipped with a plurality of comb gas portions that supply the oil smoke to pass through on the cowling panel, the guide plate set up in the top of air intake is connected the cowling panel, the guide plate is used for with greasy dirt water conservancy diversion extremely on it the cowling panel.

In some embodiments, the rectifying plate is in a shape of a "V", a "U" with a gradually increasing caliber from bottom to top, or a lower arc with an upward opening, and a plurality of the air combing parts are respectively arranged on two opposite side surfaces of the rectifying plate; the guide plate is in an inverted V shape, an inverted U shape with the caliber gradually increasing from top to bottom or an upper arc shape with a downward opening.

In some embodiments, the comb gas part is an oil filter, or the comb gas part includes an oil filter and a sound-deadening hole.

In some embodiments, the baffle is provided with a plurality of noise reduction holes, and a noise reduction cavity is formed among the baffle, the top of the box body and the upper end of the side wall of the box body.

In some embodiments, the rectification assembly further comprises two side plates which are oppositely arranged, the two side plates are respectively abutted against or connected with the left side wall and the right side wall of the box body, and the two opposite ends of the guide plate are respectively connected with the rectification plate through the two side plates.

In some embodiments, the rectification subassembly still includes the backplate, the upper and lower both ends of backplate are connected respectively the guide plate with the cowling panel, and the backplate butt or connect the fan face to the one side of rectification subassembly, the backplate corresponds the position department of air intake is equipped with the through-hole that supplies the flue gas to pass through.

In some embodiments, the back plate is further provided with a flange surrounding the through hole and extending towards the direction of the fan, and the flange penetrates through the air inlet and extends into the fan.

In some embodiments, the oil guide assembly is connected to the bottom of the fairing plate at the upper end, and extends into the fume collecting hood at the lower end, and is used for guiding oil dirt flowing down from the fairing plate to the interior of the fume collecting hood.

In some embodiments, the oil guide assembly extends to a position below the bottom of the fan, an oil leakage hole is formed in the bottom of the fan and located above the oil guide assembly, and the oil guide assembly is further used for guiding fluid dropping from the oil leakage hole to the interior of the smoke collecting hood.

In some embodiments, the smoke-adjusting device further comprises an adjusting component and a driving component, wherein the adjusting component is movably arranged above or below the rectifying plate and used for adjusting the smoke inlet areas of the two opposite side surfaces of the rectifying plate, and the output end of the driving component is connected with the adjusting component.

In some embodiments, the adjusting assembly includes two turning plates, the two turning plates are respectively rotatably disposed above two opposite side surfaces of the rectifying plate, and each turning plate is connected with the output end of the driving assembly through a connecting rod assembly.

In some embodiments, the adjusting assembly includes a turning plate and a rotating shaft, the turning plate is disposed at a middle position of the top surface of the rectifying plate and divides the rectifying plate into a left part and a right part, and two opposite ends of the rotating shaft are respectively connected to the turning plate and the output end of the driving assembly.

In some embodiments, the driving assembly comprises two first drivers, the two first drivers are respectively arranged at the middle position of the top surface of the rectifying plate, and the output ends of the two first drivers are respectively connected with the two connecting rod assemblies; or the second driver is provided with double output ends, the second driver is arranged in the middle of the top surface of the rectifying plate, and the two output ends of the second driver are respectively connected with the two connecting rod assemblies.

Compared with the prior art, the utility model at least comprises the following beneficial effects:

according to the range hood, the rectifying plate with the plurality of gas combing parts is arranged below the air inlet, the two opposite ends of the rectifying plate are respectively connected with or abutted to the left side wall and the right side wall of the box body, and the guide plate connected with the rectifying plate is arranged above the air inlet, so that on one hand, the gas flow can be rectified, the generation of turbulent flow is reduced, the oil separation degree is improved, on the other hand, the guide plate can guide oil stains on the rectifying plate to the rectifying plate, the oil stains are prevented from directly dripping on a cooking bench below the range hood from the guide plate vertically downwards, the oil stains are prevented from escaping upwards to the top of the box body, and the phenomenon that oil is easily hung on the top of the box body is solved.

Drawings

Fig. 1 is a sectional view of a range hood according to embodiment 1 of the present invention, in which a ceiling plate of a smoke collecting hood is hidden;

FIG. 2 is an exploded view of a blower, a rectifying unit and an oil guide unit in example 1 of the present invention;

FIG. 3 is a sectional view of a fan, a flow straightener assembly and an oil guide assembly in example 1 of the present invention;

FIG. 4 is a schematic structural diagram of the rectifying assembly, the adjusting assembly, the driving assembly and the connecting rod assembly in embodiment 2 of the present invention;

FIG. 5 is an exploded view of the adjustment assembly, the drive assembly and the linkage assembly in embodiment 2 of the present invention;

fig. 6 is a schematic structural view of a rectifying assembly and a regulating assembly in embodiment 3 of the present invention.

In the figure: 11-a box body, 12-a fan, 121-an air inlet, 122-an oil leakage hole and 123-a U-shaped bracket;

2-a smoke collecting hood, 201-a smoke inlet;

3-an oil screen assembly;

4-rectifying component, 41-rectifying plate, 411-oil filtering hole, 412-silencing hole, 42-guide plate, 421-noise reducing hole, 43-side plate, 44-back plate, 441-through hole and 442-flanging;

5-a noise reduction cavity;

6-oil guide assembly, 61-connecting plate, 62-left inclined plate, 63-right inclined plate;

7-adjusting component, 71-turning plate, 72-first hinging plate, 73-second hinging plate, 74-mounting bracket, 741-flanging and 75-rotating shaft;

8-drive assembly, 81-first drive;

9-connecting rod assembly.

Detailed Description

The present invention is illustrated by the following examples, but the present invention is not limited to these examples. Modifications to the embodiments of the utility model or equivalent substitutions of parts of technical features without departing from the spirit of the utility model are intended to be covered by the scope of the claims of the utility model.

Example 1

Referring to fig. 1 to 3, the present embodiment provides a range hood, which includes a wind cabinet assembly, a smoke collecting hood 2, an oil screen assembly 3, and a rectification assembly 4, wherein the range hood includes a box 11 and a fan 12 having an air inlet 121, the fan 12 is installed inside the box 1, and the air inlet 121 faces to a front side or a back side of the box 1, and the present embodiment takes the air inlet 121 facing to the front side of the box 1 as an example. The smoke collecting hood 2 is arranged at the bottom of the box body 11 and communicated with the box body 11, the smoke collecting hood 2 is provided with at least one smoke inlet 201 for smoke to pass through, and the smoke collecting hood 2 is provided with two smoke inlets 201 which are arranged side by side at intervals left and right in the bottom of the smoke collecting hood 2. An oil screen assembly 3 is arranged at each smoke inlet 201 to realize preliminary filtration of oil smoke flowing through the oil screen assembly 3.

Rectification subassembly 4 sets up in box 11 and arranges near air intake 121, and rectification subassembly 4 includes cowling panel 41 and guide plate 42, and cowling panel 41 is located the below of air intake 121 to the left and right sides wall of box 11 is connected or butt respectively at the relative both ends of cowling panel 41, passes through between to avoid the flue gas from cowling panel 41 and the box 11 lateral wall. The rectifying plate 41 is provided with a plurality of air-combing portions (not shown) for allowing oil smoke to pass through, so that air flow is rectified by the rectifying plate 41, turbulence is reduced, and oil-fat separation is improved. The guide plate 42 is disposed above the air inlet 121 and connected to the rectifying plate 41, the guide plate 42 is used for guiding oil stains thereon to the rectifying plate 41, and at this time, the connected rectifying plate 41 and the guide plate 42 jointly surround the area in front of the air inlet 121. A smoke collecting area is formed among the front surface of the box body 11, the front surface of the fan 12, the rectifying plate 41 and the guide plate 42, the smoke collecting area is communicated with the area below the rectifying plate 41 through the air combing part and is communicated with the inside of the fan 12 through the air inlet 201, and therefore the oil smoke can be prevented from escaping upwards to the top of the box body 1.

Fan 12 of range hood starts during operation, and inside the oil smoke was inhaled the cigarette machine, carried out prefilter through oil net subassembly 3 earlier, combed gas through cowling panel 41 again, reduced the turbulent flow and produced, further improved the grease resolution, then from holding together cigarette region inhales fan 12 inside, discharge from the range hood oil extraction structure of intercommunication fan 12 air outlet at last. Before the oil smoke is inhaled fan 12 inside, because the suction that fan 12 work produced is not enough, partial oil smoke can upwards escape and collide guide plate 42, take place the condensation on guide plate 42, the greasy dirt after the condensation can be along guide plate 42 water conservancy diversion to cowling panel 41 downwards, at last from cowling panel 41 drippage to collection petticoat pipe 2 inside, because the existence of guide plate 42, prevented the oil smoke upwards to escape to the top of box 1 to the phenomenon of the easy string of oil in top of box 12 has been solved.

It can be seen that, in the range hood of the embodiment, the rectifying plate 41 having a plurality of air-combing portions is disposed below the air inlet 121, opposite ends of the rectifying plate 41 are respectively connected or abutted to left and right side walls of the box 11, and the guide plate 42 connected to the rectifying plate 41 is disposed above the air inlet 121, so as to form a smoke-collecting region between the front surface of the box 11, the front surface of the fan 12, and the rectifying plate 41 and the guide plate 42. On the one hand, the air flow can be rectified, the turbulence is reduced, the grease separation degree is improved, and on the other hand, the guide plate 42 can guide the oil stains on the guide plate to the rectifying plate 41. Not only prevents oil stains from directly dripping from the guide plate 42 vertically downwards onto a cooking bench below the range hood, but also prevents oil smoke from escaping upwards to the top of the box body 1, thereby solving the problem that the top of the box body 12 is easy to hang oil.

Referring to fig. 1-2, the rectifying plate 41 is in a shape of "V", a U "with a gradually increasing caliber from bottom to top, or a lower arc with an upward opening, and a plurality of air-combing portions are respectively disposed on two opposite side surfaces of the rectifying plate 41. In this embodiment, the rectifying plate 41 is in a U shape with a gradually increasing caliber from bottom to top, the rectifying plate 41 is composed of a middle connecting surface and left and right side surfaces, the left and right side surfaces are obliquely arranged in the vertical direction, one end of each side surface is abutted to or connected with the left side wall or the right side wall of the box body 1 close to the box body, the other end of each side surface is connected with the middle connecting surface, and a plurality of air combing portions are arranged on the left and right side surfaces of the rectifying plate 41. From this, through the left and right sides face that has a plurality of comb gas portions and slope and arrange, realized respectively to control the air current and carry out the rectification to reduce the turbulent flow and produce, improve the grease resolution, oil drops on the left and right sides face of cowling panel 41 simultaneously can converge to middle connection face department along the side that the slope was arranged, then from middle connection face drippage to collection petticoat pipe 2 inside, avoid the greasy dirt on the cowling panel 41 directly to drip on the top of a kitchen range of range below the range hood.

The gas combing portion of the present embodiment includes oil filtering holes 411 and noise elimination holes 412, wherein all the oil filtering holes 411 are staggered and arranged side by side on the whole side of the rectifying plate 41 to ensure that the side of the rectifying plate 41 has a large unit smoke inlet area, thereby improving the smoke inlet and gas combing effects. All the muffling holes 412 are divided into two parts, which are respectively arranged at the opposite ends of the side surface of the rectifying plate 41, so as to reduce the noise of the flue gas flowing through the muffling holes, thereby reducing the noise of the air flow. In other embodiments, the air-carding part may be only the oil filtering hole 411, i.e. the silencing hole 412 on the rectifying plate 41 is omitted.

Referring to fig. 1-2, the deflector 42 is in the shape of an inverted "V", an inverted "U" with a gradually increasing diameter from top to bottom, or an upper arc open downward. This embodiment uses guide plate 42 to be "V" font down as an example, like this, the oil smoke collides guide plate 42 and when its condensation forms the greasy dirt, the greasy dirt can be along two inclined planes from the top down flow to cowling panel 41 of guide plate 42 on to avoid the greasy dirt directly from colliding on guide plate 42 vertical downward drippage to the top of a kitchen range of range below of range hood, promote user's use and experience.

A plurality of noise reduction holes 421 are arranged on two inclined planes of the guide plate 42, and a noise reduction cavity 5 is formed between the guide plate 42, the top of the box body 11 and the upper end of the side wall of the box body 11. Therefore, through the matching of the noise reduction hole 421 and the noise reduction cavity 5, the reduction of the airflow noise is reduced, and the noise reduction effect is improved.

Referring to fig. 1-2, the rectifying assembly 4 further includes two side plates 43 disposed oppositely, the two side plates 43 respectively abut against or connect to the left and right side walls of the box 11, and the two opposite ends of the flow guide plate 42 are respectively connected to the two side surfaces of the rectifying plate 41 through the two side plates 43. Thus, by providing two side plates 43, it is more convenient to connect flow guide plate 42 and flow rectification plate 41, and the area of the region surrounded by flow rectification plate 41, two side plates 43, and flow guide plate 42 is increased.

The rectification assembly 4 further comprises a back plate 44, the upper and lower edges of the back plate 44 are respectively connected with the guide plate 42 and the rectification plate 41, and the left and right edges of the back plate 44 are respectively connected with the two side plates 43. The back plate 44 is abutted or connected with one surface of the fan 12 facing the rectifying component 4, and a through hole 441 for smoke to pass through is arranged at the position of the back plate 44 corresponding to the air inlet 121. In this embodiment, the back plate 44 may be designed to be fastened to the front surface of the fan 12, and the side plate 43 is designed to abut against the left or right side wall of the case 1 near thereto. Therefore, through the arrangement of the back plate 44, on one hand, the back plate 44 is convenient to be connected with the front side of the fan 12, so that the rectifying component 4 is integrated on the fan 12, the rectifying component 4 can be ensured to be mounted or dismounted together with the fan 12 for cleaning, and the quick dismounting is convenient; on the other hand, the front surface of the fan 12 is not needed, and the rectification component 4 and the front surface of the box body 1 can be enclosed to form a smoke gathering area.

Referring to fig. 2-3, the back plate 44 is further provided with a flange 442 surrounding the through hole 441 and extending toward the fan 12, and the flange 442 extends into the fan 12 through the air inlet 121. Therefore, the arrangement of the turned edge 442 not only wraps the air inlet 121, but also facilitates guiding the oil smoke into the fan 12.

Referring to fig. 1-3, the oil guide assembly 6 is further included, an upper end of the oil guide assembly 6 is connected to the bottom of the fairing plate 41, and a lower end of the oil guide assembly 6 extends into the fume collecting hood 2, and is used for guiding oil dirt flowing down from the fairing plate 41 to the interior of the fume collecting hood 2. Preferably, the oil guiding assembly 6 extends to the bottom of the fan 12, an oil leakage hole 122 is formed at the bottom of the fan 12 and located above the oil guiding assembly 6, and the oil guiding assembly 6 is further used for guiding the fluid dropping from the oil leakage hole 122 to the inside of the smoke collecting hood 2. Thus, the oil guide assembly 6 can guide not only oil droplets flowing down from the rectifying plate 41, but also fluid flowing down from the oil leakage hole 122 of the fan 12. The fluid in this embodiment may be oil or a mixture of water and oil.

In the present embodiment, the oil guide assembly 6 includes a connection plate 61, a left inclination plate 62 and a right inclination plate 63, the connection plate 61 is disposed at the middle connection surface of the current plate 41 and the bottom of the fan 12, and the front side of the connection plate 61 is fastened to the middle connection surface and the rear side is connected to or abutted against a U-shaped bracket disposed at the bottom of the fan 12, so that a distance is left between the oil leakage hole 122 and the connection plate 61. The upper end of the left inclined plate 62 and the upper end of the right inclined plate 63 are respectively connected with the left edge and the right edge of the connecting plate 61, the left inclined plate 62 is used for guiding oil stains dripped from the left side surface of the rectifying plate 41 and from the oil leakage hole 122 to the connecting plate 61 to the left side of the inside of the smoke collecting hood 1, and the right inclined plate 63 is used for guiding the oil stains dripped from the right side surface of the rectifying plate 41 and from the oil leakage hole 122 to the connecting plate 61 to the right side of the inside of the smoke collecting hood 1 and then flows into an oil cup of the range hood from the smoke collecting hood 2.

Example 2

Referring to fig. 4-5, the present embodiment is different from embodiment 1 in that the present embodiment further includes an adjusting assembly 7 and a driving assembly 8, the adjusting assembly 7 is movably disposed above or below the rectifying plate 41 for adjusting smoke inlet areas of two opposite sides of the rectifying plate 41, and an output end of the driving assembly 8 is connected to the adjusting assembly 7. Therefore, the smoke inlet area of the opposite two side surfaces of the rectifying plate 41 can be changed by driving the adjusting component 7 to move according to the smoke inlet condition of the left smoke inlet 201 and the right smoke inlet 201, so that the single-cavity opening smoking effect is improved, and the problem of poor single-side opening smoking effect is solved.

In the present embodiment, the adjusting assembly 7 includes two flaps 71, and the two flaps 71 are respectively rotatably disposed above two opposite side surfaces of the rectifying plate 41. The driving assembly 8 comprises two first drivers 81, the two first drivers 81 are respectively arranged at the middle position of the top surface of the rectifying plate 41, and the output end of each first driver 81 is connected with the corresponding turning plate 71 through the connecting rod assembly 9. Thus, by the cooperation of the two turning plates 71 and the two first drivers 81, the turning motion of the two turning plates 71 is controlled independently, so that the smoke inlet area of each side surface of the rectifying plate 41 is adjusted independently.

The adjustment assembly 7 further comprises two first hinge plates 72 and two second hinge plates 73, each flap 71 being connected on one side to the side plate 43 adjacent thereto by the first hinge plate 72 and on the other side to the corresponding link assembly 9 by the second hinge plate 73.

When single-cavity smoking is needed, the turning plate 71 on the left side or the right side is controlled to turn forwards according to the position generated by the oil smoke. Taking the right smoke inlet 201 needing to smoke as an example, the left first driver 81 is controlled to start to drive the left turning plate 71 to turn forward until the left turning plate 71 is in a horizontal state and completely shields the air combing part on the left side surface of the rectifying plate 41, meanwhile, the right first driver 81 does not work, so that the right turning plate 71 continues to be in a vertical arrangement state, and the right turning plate 71 is ensured not to influence the smoke inlet and air combing effect on the right side surface of the rectifying plate 41.

When the left smoke inlet 201 is switched from non-smoking to smoking, the left first driver 81 is controlled to be started to drive the left turning plate 71 to turn backwards until the left turning plate 71 is in a vertical arrangement state.

When dual-cavity smoking is needed, the turning plates 71 on the left side and the right side are controlled to be in a vertical arrangement state, so that the left turning plate 71 and the right turning plate 71 are prevented from blocking the air combing parts on the left side surface and the right side surface of the rectifying plate 41, and the integral air combing and smoke inlet effects of the rectifying plate 41 are ensured.

In other preferred embodiments, the adjusting assembly 7 further comprises a mounting bracket 74, the mounting bracket 74 has two flanges 741 extending upward and arranged oppositely, and the lower end of one side of each flap 71 near the flange 741 is rotatably connected to the flange 741, so that the connection point of the flap 71 and the first hinge plate 72 and the flange 741 serves as a hinge point for the turning motion of the flap 71, and the connection of the flap 71 is more reliable. The first drivers 81 are installed on the folding edges 741, the upper end of one side, close to the folding edges 741, of each turning plate 71 is connected with the corresponding first driver 81 through the second hinge plate 73 and the corresponding connecting rod assembly 9 in sequence, and at the moment, the connecting point of the turning plate 71 and the second hinge plate 73 serves as a power point for pushing the turning plate 71 to perform turning motion.

In other embodiments, the driving assembly 8 may be designed to include a second driver with double output ends, that is, the two first drivers 81 are replaced by the second driver with double output ends, and the two output ends of the second driver are respectively connected with the corresponding flanges 71 through the connecting rod assembly 9, compared to the two single output drivers, the two single output drivers are used as the power source, which is lower in cost.

Example 3

Referring to fig. 6, the present embodiment is different from embodiment 2 in that the structure of the adjustment assembly 7 is different, and the link assembly 9 is omitted. In this embodiment, the adjusting assembly 7 includes a turning plate 71 and a rotating shaft 75, the turning plate 71 is disposed at the middle position of the top surface of the rectifying plate 41, and divides the rectifying plate 41 into a left part and a right part, and two opposite ends of the rotating shaft 75 are respectively connected to the turning plate 71 and the output end of the driving assembly 8.

When single chamber smoking is required, the drive assembly 8 controls the turnover movement of the turning plate 71 according to the position generated by the oil smoke, and the air combing part on the left side surface or the right side surface of the rectifying plate 41 is shielded by the turning plate 71, so that the suction generated by the fan work is distributed to one side surface of the rectifying plate 41 which is not shielded by the turning plate 71, the single chamber opening smoking effect is improved, and the problem of poor single-side opening smoking effect is solved.

When double-cavity smoking is needed, the driving component 8 controls the turning plate 71 to turn to the middle position, even if the turning plate 71 is in a vertical arrangement state, the turning plate 71 is prevented from blocking the air combing parts on the left side surface and the right side surface of the rectifying plate 41, and the integral air combing and smoke inlet effects of the rectifying plate 41 are ensured.

What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the utility model.

Claims

1. A range hood, comprising:

the air cabinet assembly comprises a box body (11) and a fan (12) with an air inlet (121);

the smoke collecting cover (2) is arranged at the bottom of the box body (11) and communicated with the box body (11), and the smoke collecting cover (2) is provided with at least one smoke inlet (201) for smoke to pass through;

rectification subassembly (4), it set up in box (11) and near air intake (121) are arranged, rectification subassembly (4) include cowling panel (41) and guide plate (42), cowling panel (41) are located the below of air intake (121), and its relative both ends connect respectively or the butt the left and right sides wall of box (11) be equipped with a plurality of comb gas portions that supply the oil smoke to pass through on cowling panel (41), guide plate (42) set up in the top of air intake (121) is connected cowling panel (41), guide plate (42) are used for with greasy dirt water conservancy diversion on it extremely cowling panel (41).

2. The range hood according to claim 1, wherein the fairing plate (41) is in a shape of "V", a "U" with a gradually increasing caliber from bottom to top, or a lower arc with an upward opening, and a plurality of the air-combing portions are respectively arranged on two opposite side surfaces of the fairing plate (41);

the guide plate (42) is in any one of an inverted V shape, an inverted U shape with the caliber gradually increasing from top to bottom or an upper arc shape with a downward opening.

3. A range hood according to claim 2, wherein the oil filtering hole (411) is formed in the oil combing portion, or the oil filtering hole (411) and the noise eliminating hole (412) are formed in the oil combing portion.

4. The range hood according to claim 2, wherein a plurality of noise reduction holes (421) are formed on the guide plate (42), and a noise reduction cavity (5) is formed between the guide plate (42), the top of the box body (11) and the upper end of the side wall of the box body (11).

5. The range hood according to claim 1, wherein the flow guiding assembly (4) further comprises two side plates (43) arranged oppositely, the two side plates (43) are respectively abutted against or connected with the left side wall and the right side wall of the box body (11), and the two opposite ends of the flow guiding plate (42) are respectively connected with the flow guiding plate (41) through the two side plates (43).

6. The range hood according to any one of claims 1 to 5, wherein the flow rectification assembly (4) further comprises a back plate (44), the upper end and the lower end of the back plate (44) are respectively connected with the flow guide plate (42) and the flow rectification plate (41), the back plate (44) abuts against or is connected with one surface of the fan (12) facing the flow rectification assembly (4), and a through hole (441) for passing through smoke is formed in a position of the back plate (44) corresponding to the air inlet (121).

7. The range hood according to claim 6, wherein the back plate (44) is further provided with a flange (442) surrounding the through hole (441) and extending towards the fan (12), and the flange (442) penetrates through the air inlet (121) and extends into the fan (12).

8. The range hood according to claim 1, further comprising an oil guiding assembly (6), wherein an upper end of the oil guiding assembly (6) is connected to the bottom of the rectifying plate (41), and a lower end of the oil guiding assembly extends into the fume collecting hood (2) for guiding oil dirt flowing down from the rectifying plate (41) into the fume collecting hood (2).

9. A range hood according to claim 8, characterized in that the oil guide assembly (6) extends to below the bottom of the fan (12), an oil leakage hole (122) is provided at the bottom of the fan (12) above the oil guide assembly (6), and the oil guide assembly (6) is further used for guiding the fluid dropping from the oil leakage hole (122) to the inside of the smoke collecting hood (2).

10. The range hood according to any one of claims 1-5 or 8-9, further comprising an adjusting assembly (7) and a driving assembly (8), wherein the adjusting assembly (7) is movably disposed above or below the rectifying plate (41) for adjusting smoke inlet areas of two opposite sides of the rectifying plate (41), and an output end of the driving assembly (8) is connected to the adjusting assembly (7).

11. A range hood according to claim 10, wherein the adjusting assembly (7) comprises two turning plates (71), the two turning plates (71) are respectively rotatably arranged above two opposite side surfaces of the rectifying plate (41), and each turning plate (71) is connected with the output end of the driving assembly (8) through a connecting rod assembly (9).

12. The range hood according to claim 10, wherein the adjusting assembly (7) comprises a turning plate (71) and a rotating shaft (75), the turning plate (71) is disposed at a middle position of the top surface of the rectifying plate (41) and divides the rectifying plate (41) into a left part and a right part, and two opposite ends of the rotating shaft (75) are respectively connected to the turning plate (71) and the output end of the driving assembly (8).

13. The range hood according to claim 11, wherein the driving assembly (8) comprises two first drivers (81), the two first drivers (81) are respectively arranged at the middle position of the top surface of the rectifying plate (41), and the output ends of the two first drivers (81) are respectively connected with the two connecting rod assemblies (9);

or a second driver with double output ends, wherein the second driver is arranged in the middle position of the top surface of the rectifying plate (41), and the two output ends of the second driver are respectively connected with the two connecting rod assemblies (9).