CN216079977U

CN216079977U - Fume exhaust fan

Info

Publication number: CN216079977U
Application number: CN202122112524.8U
Authority: CN
Inventors: 杨伟刚; 李斌; 黄友根
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2022-03-18
Anticipated expiration: 2031-08-31

Abstract

The utility model relates to a range hood, comprising: the shell is provided with a first air inlet positioned on the left side of the bottom and a second air inlet positioned on the right side of the bottom; the air curtain device is arranged on the casing, is provided with an air outlet which is positioned at the bottom of the casing and is arranged between the first air inlet and the second air inlet, and the air outlet can downwards spray air flow so as to form an air curtain for isolating oil smoke between the first air inlet and the second air inlet. When carrying out single-stove culinary art operation, above-mentioned air curtain air current can block the oil smoke that this culinary art side produced and escape to the opposite side, has improved oil absorption cigarette effect. Meanwhile, the problem that grease is accumulated on bottom parts of the range hood due to the fact that oil smoke escapes to the side part, the cleaning difficulty is high is solved, and the use experience of a user is effectively improved.

Description

Fume exhaust fan

Technical Field

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

Background

The range hood is a kitchen appliance for purifying the kitchen environment. Common range hoods in the market include top suction type, side suction type and diving type. The top-suction type range hood adopts the oil smoke rising principle, generates a negative pressure area right above a cooking bench, and sucks and exhausts naturally rising oil smoke generated during cooking. The side-draft range hood power source is close to the cooking bench, and most of the oil smoke close to the cooking bench is absorbed in an arc form. The suction inlet of the submerged range hood is closer to a cooking bench, the negative pressure area is close to a smoke source, the path of the movement of the oil smoke is reduced, and compared with other two forms, the range hood has a better oil smoke absorption effect, but the range hood has the following problems that the oil smoke is easy to escape to the periphery under the large oil smoke state such as stir-frying and the like, the negative pressure area is not concentrated when the gas stove cooks in a single pot, the oil smoke absorption effect is poor, and the submerged range hood is disclosed in the range hood which can collect the oil smoke and is disclosed in the application number CN 201821202552.0.

Therefore, the application No. CN201910686470.0 (invention publication No. CN110397970A) discloses a range hood, which includes a smoke collecting hood and a box body disposed above the smoke collecting hood, wherein the bottom of the smoke collecting hood and the bottom of the box body are disposed on the front side of the smoke collecting hood, and are both provided with air inlets, and each air inlet is provided with a smoke baffle plate capable of opening or closing the corresponding air inlet. The smoke baffle comprises a first smoke baffle matched with the first air inlet, a second smoke baffle matched with the second air inlet and a third smoke baffle matched with the third air inlet. An oil cup is arranged below the space between the first air inlet and the second air inlet, the oil cup is connected with the smoke collecting hood, the first air inlet is gradually inclined downwards from the left end to the middle part close to the oil cup, and the second air inlet is gradually inclined downwards from the right end to the middle part close to the oil cup. The range hood can fully utilize the advantages of low-suction, side-suction and top-suction range hoods by arranging the plurality of air inlets, and has better oil smoke suction effect under the cooking states of small oil smoke amount and large oil smoke amount.

However, the range hood has certain disadvantages in the use process, when single-stove cooking operation is performed, for example, when cooking is performed on the left side, although the smoke baffle on the left side can be turned over and opened leftwards to increase the smoke collecting area, the oil smoke generated in the cooking process on the left side still can cross over the bottom of the range hood to escape to the right area of the range hood, and the use experience of a user is influenced; on the other hand, after long-time use, grease can also be accumulated on the bottom part of the range hood (such as a frequently-arranged illuminating lamp), and the cleaning difficulty is high.

Therefore, the existing range hood needs to be further improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a range hood which can effectively prevent oil smoke generated in the cooking process of a single stove from escaping to the other side of the range hood aiming at the current situation of the prior art.

The technical scheme adopted by the utility model for solving the technical problems is as follows: a range hood, comprising:

the shell is provided with a first air inlet positioned on the left side of the bottom and a second air inlet positioned on the right side of the bottom;

the air curtain device is arranged on the casing, is provided with an air outlet which is positioned at the bottom of the casing and is arranged between the first air inlet and the second air inlet, and the air outlet can downwards spray air flow so as to form an air curtain for isolating oil smoke between the first air inlet and the second air inlet.

In order to guarantee the isolation effect of oil smoke and simplify the structural consideration of the air curtain device, the air curtain device comprises an auxiliary fan and an air flow distribution box, the air flow distribution box is provided with an air flow inlet and air outlet holes which are arranged along the front and back directions of the range hood at intervals, each air outlet hole of the air flow distribution box forms an air outlet of the air curtain device, and the outlet of the auxiliary fan is connected with the air flow inlet of the air flow distribution box.

The air curtain device has one (one row) of air outlets, but under some conditions, the first air inlet and the second air inlet are relatively far away from each other in the left-right direction, only one air outlet is arranged to be difficult to effectively adapt to the two air inlets, the oil smoke isolation effect is achieved, and the area between the two air inlets on the shell is easily polluted by smoke, the number of the air flow distribution boxes is two, namely, the first air flow distribution box and the second air flow distribution box which are arranged in the left-right direction of the range hood at intervals, the air outlet of the first air flow distribution box is arranged adjacent to the first air inlet, the air outlet of the second air flow distribution box is arranged adjacent to the second air inlet, the number of the auxiliary fans is two, namely, the first auxiliary fan and the second auxiliary fan, the outlet of the first auxiliary fan is connected with the air inlet of the first air flow distribution box, the inlet of the first auxiliary fan is communicated with the second airflow distribution box, the outlet of the second auxiliary fan is connected with the airflow inlet of the second airflow distribution box, and the inlet of the second auxiliary fan is communicated with the first airflow distribution box.

In order to ensure the isolation effect of the formed air curtain airflow, the airflow distribution box is also provided with nozzles which are arranged at intervals in sequence along the front-back direction and have downward nozzles, the nozzles of the nozzles are flat and extend along the front-back direction of the range hood, and the nozzles of the nozzles form the air outlet holes of the airflow distribution box.

In order to realize that the opening state of the air curtain device is matched with the cooking state of the range hood (corresponding to the opening state of the smoke baffle), the range hood further comprises a smoke baffle assembly, wherein the smoke baffle assembly comprises a first smoke baffle for opening or closing the first air inlet and a second smoke baffle for opening or closing the second air inlet;

the state recognition device is used for detecting whether the first smoke baffle plate opens the first air inlet or not and whether the second smoke baffle plate opens the second air inlet or not, and the state recognition device is electrically connected with the control system, so that the range hood at least has a first state, a second state and a third state;

in the first state, the first smoke baffle opens the first air inlet, the second smoke baffle closes the second air inlet, the second auxiliary fan is closed, the first auxiliary fan of the air curtain device is started, air flow is sucked in through the air outlet holes of the second air flow distribution box, and the air flow is sprayed downwards through the air outlet holes of the first air flow distribution box to form an air curtain;

in the second state, the first smoke baffle closes the first air inlet, the second smoke baffle opens the second air inlet, the first auxiliary fan of the air curtain device is closed, the second auxiliary fan is opened, air flow is sucked through the air outlet of the first air flow distribution box, and the air flow is sprayed downwards through the air outlet of the second air flow distribution box to form an air curtain;

and in the third state, the first smoke baffle plate opens the first air inlet, the second smoke baffle plate opens the second air inlet, and the first auxiliary fan and the second auxiliary fan of the air curtain device are both closed.

The state recognition device can adopt various prior art such as a distance sensor and a microswitch, but in order to guarantee the accuracy of detection of the opening state of the smoke baffle plate, the side edge of the first smoke baffle plate is hinged with the left side position of the first air inlet and is driven by the first electric turnover movement mechanism, the side edge of the second smoke baffle plate is hinged with the right side position of the second air inlet and is driven by the second electric turnover movement mechanism, and the state recognition device comprises a current detection device for current information of the first electric turnover movement mechanism and the second electric turnover movement mechanism.

In order to further improve the oil smoke absorption effect, the first air inlet is downwards inclined from left to right, and the second air inlet is downwards inclined from right to left.

In order to improve the lighting effect and collect the oil falling from the casing, the bottom of the casing is provided with a lighting lamp and an oil cup in the area between the first air inlet and the second air inlet, and the oil cup is positioned at the rear side of the lighting lamp.

In order to improve the oil fume absorption effect and conveniently wash and consider fan system and casing inner wall, still include fan system, this fan system is located the lower part of casing, the front side of the lower part of casing has uncovered and can open or close this open upset panel, the import of fan system is just right the front side of casing is uncovered, and is equipped with first oil filter screen.

In order to filter the flue gas, a second filtering screen is arranged at the first air inlet and the second air inlet.

Compared with the prior art, the utility model has the advantages that: be provided with the air curtain device that can jet the air current downwards and form the air curtain between the first air intake and the second air intake of casing, when carrying out single-stove culinary art operation, above-mentioned air curtain air current can block the oil smoke that this culinary art side produced and escape to the opposite side, has improved the oil absorption cigarette effect. Meanwhile, the problem that grease is accumulated on bottom parts of the range hood due to the fact that oil smoke escapes to the side part, the cleaning difficulty is high is solved, and the use experience of a user is effectively improved.

Drawings

Fig. 1 is a schematic perspective view of a range hood according to an embodiment of the present invention (a first smoke barrier and a second smoke barrier are in an open state);

fig. 2 is a schematic perspective view of a range hood according to an embodiment of the present invention (the first smoke barrier and the second smoke barrier are in a closed state, and the flip panel is in an open state);

FIG. 3 is a front view of FIG. 2;

fig. 4 is a schematic bottom view of a range hood according to an embodiment of the present invention (without a flip panel and a lighting lamp);

fig. 5 is a schematic top view of a range hood according to an embodiment of the present invention (omitting a fan system, a flip panel, and a top portion of a housing);

fig. 6 is a vertical sectional view of the extractor hood according to the embodiment of the present invention in the left-right direction;

fig. 7 is a schematic perspective view of an air curtain device of a range hood according to an embodiment of the present invention;

fig. 8 is a schematic perspective view of an air curtain device of a range hood according to another embodiment of the present invention;

fig. 9 is a schematic back perspective view of a range hood according to an embodiment of the present invention.

Detailed Description

The utility model is described in further detail below with reference to the accompanying examples.

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. 1-9, a range hood includes a housing 10, a smoke barrier assembly, a fan system 20, and an air curtain device 40.

Fig. 1 shows a schematic perspective view of the range hood of the present embodiment, wherein the first smoke barrier 31 and the second smoke barrier 32 are in an open state, and the flip panel 16 is in a closed state; fig. 2 is a schematic perspective view illustrating another state of the range hood of the present embodiment, in which the first smoke barrier 31 and the second smoke barrier 32 are in a closed state, and the flip panel 16 is in an open state. Referring to fig. 1 and 2, it can be seen that the casing 10 has an inverted trapezoidal structure with a wide top and a narrow bottom, and the fan system 20 is disposed in the casing 10. The two sides of the bottom of the casing 10 are respectively provided with a first air inlet 11 and a second air inlet 12, specifically, the first air inlet 11 is located at the left side of the bottom of the casing 10 and is inclined downwards from left to right, and the second air inlet 12 is located at the right side of the bottom of the casing 10 and is inclined downwards from left to right. The first air inlet 11 and the second air inlet 12 are both provided with a second filtering screen 13.

With reference to fig. 1, the bottom of the casing 10 is provided with an illuminating lamp 14 and an oil cup 15 in the areas of the first air inlet 11 and the second air inlet 12, wherein the illuminating lamp 14 is in a strip shape and is arranged along the front-back direction of the range hood. The oil cup 15 is located at the rear side of the illumination lamp 14 and arranged along the left and right direction of the range hood to receive oil dripping from the inner wall of the casing 10 or the fan system 20.

With continued reference to fig. 2, the lower front side of the casing 10 is provided with an opening 17, the opening 17 is provided with a flip panel 16 capable of flipping, the left side edge of the flip panel 16 is hinged on the casing 10, and the front opening 17 of the casing 10 can be opened or closed. The fan system 20 is located at the lower portion of the cabinet 10, and the inlet of the fan system 20 faces the front opening 17 of the cabinet 10. The design of the turning panel 16 facilitates the user to clean the fan system 20 and the inner wall of the casing 10.

With continued reference to fig. 2, the inlet of the fan system 20 is further provided with a first filtering screen 21, and the first filtering screen 21 is preferably a honeycomb network, so as to improve the separation degree of grease, prevent oil from accumulating on the surface of the impeller of the fan system 20, and reduce the cleaning difficulty.

Fig. 3 is a front view of the range hood of the present embodiment, in which the flip panel 16 is omitted. Referring to fig. 1, it can be seen that a first smoke barrier 31 and a second smoke barrier 32 are further disposed on the housing 10, wherein the first smoke barrier 31 is hinged to the left side of the first air inlet 11 and can open or close the first air inlet 11, and the shape of the first smoke barrier 31 matches the shape of the first air inlet 11. The second smoke baffle 32 is hinged at the right side of the second air inlet 12 and can open or close the second air inlet 12, and the shape of the second smoke baffle 32 is matched with that of the second air inlet 12.

Fig. 4 is a schematic bottom perspective view of the range hood of the present embodiment, wherein the flip panel 16 and the illumination lamp 14 are omitted. As can be seen from fig. 4, a first electric turnover movement mechanism 33 and a second electric turnover movement mechanism 34 are further disposed on the left and right side walls inside the casing 10, wherein the first electric turnover movement mechanism 33 is connected to the first smoke baffle 31 to drive the first smoke baffle 31 to turn over, the second electric turnover movement mechanism 34 is connected to the second smoke baffle 32 to drive the second smoke baffle 32 to turn over, the first electric turnover movement mechanism 33 and the second electric turnover movement mechanism 34 may adopt various prior arts such as a movement mechanism formed by combining a motor and a connecting rod assembly, a movement mechanism formed by combining a motor and a crankshaft assembly, and the like, and are not described herein.

Fig. 5 is a schematic top perspective view of the range hood of the present embodiment, and the air curtain device 40 is clearly shown, and the fan system 20, the flip panel 16 and a part of the top structure of the housing 10 are omitted. The air curtain device 40 includes an auxiliary blower and two air distribution boxes, specifically, a first air distribution box 41 and a second air distribution box 42. The first airflow distribution box 41 and the second airflow distribution box 42 are both strip-shaped, and are arranged at intervals in the left-right direction of the range hood and extend along the front-back direction of the range hood. The first airflow distribution box 41 and the second airflow distribution box 42 each have an airflow inlet and an air outlet spaced apart from each other in the front-rear direction of the range hood. The air outlet of the first air distribution box 41 is disposed adjacent to the first air inlet 11, and the air outlet of the second air distribution box 42 is disposed adjacent to the second air inlet 12. Correspondingly, there are two auxiliary blowers, namely a first auxiliary blower 43 and a second auxiliary blower 44. The outlet of the first auxiliary blower 43 is connected to the airflow inlet of the first airflow distribution box 41, and the inlet of the first auxiliary blower 43 is communicated with the second airflow distribution box 42. The outlet of the second auxiliary blower 44 is connected to the airflow inlet of the second airflow distribution box 42, and the inlet of the second auxiliary blower 44 is communicated with the first airflow distribution box 41. The air outlets of the first air distribution box 41 and the second air distribution box 42 constitute air outlets of the air curtain device 40.

Fig. 7 and fig. 8 are schematic perspective views of two angular states of the air curtain device 40 of the range hood of the present embodiment. As can be seen from fig. 7 and 8, the first airflow distribution box 41 and the second airflow distribution box 42 are further provided with nozzles 411,421 which are sequentially arranged at intervals in the front-back direction and have

downward nozzles

4110,4210, wherein the

nozzles

4110,4210 of the nozzles 411,421 are flat and extend in the front-back direction of the range hood, and the

nozzles

4110,4210 of the nozzles 411,421 form air outlets of the airflow distribution boxes, that is, the air outlets 400 of the air curtain device. Wherein, the nozzles 411,421 adopt the structure of

elbow nozzles

411, 421.

The arrangement of the

nozzles

411 and 421 can primarily filter the water vapor in the air in the kitchen, and ensure that the air entering the air curtain system is cleaner. The

nozzles

411 and 421 are preferably uniformly distributed at equal intervals in the front-back direction of the casing 10 to ensure the uniformity of the outlet air, the outlet air speed can be greater than 8m/s, and the speed of the outlet air speed is far greater than the oil smoke suction speed, so that the oil smoke can be effectively prevented from escaping. Moreover, because the area of the

nozzles

411 and 421 forming the air curtain is small, the risk of oil and water hanging is small, and the use experience of a user is improved.

Fig. 6 is a vertical cross-sectional view of the range hood according to the embodiment of the present invention in the left-right direction, and as can be seen from fig. 6, the

nozzles

4110,4210 of the nozzles 411,421 on the airflow distribution box of the air curtain device 40 are disposed downward, and when the auxiliary blower is operated, the nozzles 411,421 can spray the airflow downward to form an air curtain for isolating the oil smoke between the first air inlet 11 and the second air inlet 12.

With continued reference to fig. 6, the range hood further includes a state identification device, which is configured to detect whether the first smoke barrier 31 opens the first air inlet 11 and whether the second smoke barrier 32 opens the second air inlet 12. The state recognition device is electrically connected with the control system, so that the range hood at least has a first state, a second state and a third state.

In the first state, the first smoke barrier 31 turns leftwards to open the first air inlet 11, and the second smoke barrier 32 closes the second air inlet 12. The second auxiliary fan 44 of the air curtain device 40 is turned off, and the first auxiliary fan 43 is turned on, so that the air flow is sucked into the right side of the bottom of the range hood through the air outlet holes of the second air flow distribution box 42, and is downwardly sprayed through the air outlet holes of the first air flow distribution box 41 to form an air curtain, the air curtain can isolate the smoke generated in the cooking area on the left side and avoid escaping to the right side, wherein the path of the air curtain air flow can be seen in dotted lines and arrows in fig. 6, and the arrow is realized as the rising track of the smoke generated on the left side. In addition, in this state, the first smoke barrier 31 turned open on the left side also increases the smoke collection area relatively to the left, and reduces the escape of the smoke at the edge of the left side. The first state is adapted to the working condition of cooking processing on the left side of the bottom of the range hood.

In the second state, the first smoke barrier 31 closes the first air inlet 11, and the second smoke barrier 32 deflects to the right to open the second air inlet 12. The first auxiliary fan 43 of the air curtain device 40 is turned off, the second auxiliary fan 44 is turned on, and the air flow is sucked in the left region of the range hood through the air outlet holes of the first air flow distribution box 41 and is sprayed downward through the air outlet holes of the second air flow distribution box 42 to form an air curtain. The air curtain airflow can isolate smoke generated in the right cooking area and avoid escaping to the right side. The second state is adapted to the working condition of cooking processing at the right side of the bottom of the range hood.

In the third state, the first smoke baffle 31 turns left to open the first air inlet 11, the second smoke baffle 32 turns right to open the second air inlet 12, and the first auxiliary fan 43 and the second auxiliary fan 44 of the air curtain device 40 are both turned off, i.e., in this state, the air curtain device 40 does not need to be started, and this third state is adapted to the working condition of cooking processing performed on the left and right sides of the bottom of the range hood.

The state recognition means of the present embodiment includes current detection means (not shown) for current information to the first electric tumbling motion mechanism 33 and the second electric tumbling motion mechanism 34. When the range hood starts to work, under the condition that only the first electric turnover movement mechanism 33 acts, only the second electric turnover movement mechanism 34 acts and both the first electric turnover movement mechanism 33 and the second electric turnover movement mechanism 34 act, the current detection device detects that the currents in the circuits are different, and therefore whether the corresponding smoke baffle is in an opening state or not can be identified. The detection process and the operation principle of the current detection device are the prior art and are not described herein. It is conceivable that the state recognition device of the present embodiment may employ various conventional technologies such as a distance sensor, a micro switch, and the like, in addition to the above-described current detection device.

Fig. 9 is a schematic back perspective view of the range hood of this embodiment, and it can be seen that the turning panel 16 at the front of the casing 10 is square, and the casing 10 is overall in an inverted trapezoid structure, wherein the corner regions at two sides of the bottom of the turning panel 16 are exposed out of the bottom of the casing 10. It is contemplated that the flip panel 16 may also be configured to conform to the front wall of the cabinet 10. In addition, a decorative cover 50 extending upward is further disposed above the front side of the casing 10 to improve the aesthetic property of the range hood.

The range hood of the embodiment has the advantages that:

1. an air curtain device 40 capable of downwardly spraying air flow to form an air curtain is arranged between the first air inlet 11 and the second air inlet 12 of the casing 10, and when single-stove cooking operation is carried out, the air curtain air flow can prevent oil smoke generated at the cooking side from escaping to the other side, so that the oil smoke absorption effect is improved; meanwhile, the problem that grease is accumulated on bottom parts of the range hood due to the fact that oil smoke escapes to the side part, the cleaning difficulty is high is solved, and the use experience of a user is effectively improved.

2. The negative pressure of the air inlet with the left and right cool parts of the shell 10 can be automatically distributed, and the effective air quantity of a single air suction opening is 7.5-8m in the cooking state of a single stove³The oil smoke absorption effect can be guaranteed in min, the rotating speed of the whole fan system 20 is low, the noise is low, the sound experience is good, the air inlet negative pressure effectively covers the upper portion of the smoke source, and the oil smoke is efficiently locked.

3. The fan system 20 is designed to be arranged below the casing 10, the resistance of the whole air channel is small, the distance between the inlet of the fan system 20 and a smoke source is short, the air speed of the inlet of a range hood is high under the condition of the same rotating speed, the smoke suction effect is good, the material consumption of the whole machine is low, and the cost is low.

4. The flip panel 16 on the front side of the enclosure 10 can be flipped open to facilitate the user to clean the blower system 20 and the inner wall of the enclosure 10.

Claims

1. A range hood, comprising:

the air conditioner comprises a shell (10) and a fan, wherein the shell is provided with a first air inlet (11) positioned on the left side of the bottom and a second air inlet (12) positioned on the right side of the bottom;

it is characterized by also comprising:

the air curtain device (40) is arranged on the machine shell (10), the air curtain device is provided with an air outlet (400) which is positioned at the bottom of the machine shell (10) and arranged between the first air inlet (11) and the second air inlet (12), and the air outlet (400) can downwards spray air flow so as to form an air curtain for isolating oil smoke between the first air inlet (11) and the second air inlet (12).

2. The range hood of claim 1, wherein: the air curtain device (40) comprises auxiliary fans (43,44) and air flow distribution boxes (41,42), the air flow distribution boxes (41,42) are provided with air flow inlets and air outlet holes which are arranged at intervals along the front and rear directions of the range hood, the air outlet holes of the air flow distribution boxes (41,42) form an air outlet (400) of the air curtain device (40), and outlets of the auxiliary fans (43,44) are connected with the air flow inlets of the air flow distribution boxes (41, 42).

3. The range hood of claim 2, wherein: the two airflow distribution boxes are respectively a first airflow distribution box (41) and a second airflow distribution box (42), the first airflow distribution box (41) and the second airflow distribution box (42) are arranged at intervals in the left-right direction of the range hood, the air outlet hole of the first airflow distribution box (41) is arranged adjacent to the first air inlet (11), the air outlet hole of the second airflow distribution box (42) is arranged adjacent to the second air inlet (12), the two auxiliary fans are respectively a first auxiliary fan (43) and a second auxiliary fan (44), the outlet of the first auxiliary fan (43) is connected with the airflow inlet of the first airflow distribution box (41), the inlet of the first auxiliary fan (43) is communicated with the second airflow distribution box (42), and the outlet of the second auxiliary fan (44) is connected with the airflow inlet of the second airflow distribution box (42), the inlet of the second auxiliary blower (44) communicates with the first air flow distribution box (41).

4. The range hood of claim 2, wherein: the air flow distribution boxes (41,42) are also provided with nozzles (411,421) which are sequentially arranged at intervals along the front-back direction and have downward nozzles (4110,4210), the nozzles (4110,4210) of the nozzles (411,421) are flat and extend along the front-back direction of the range hood, and the nozzles (4110,4210) of each nozzle (411,421) form each air outlet of the air flow distribution boxes (41, 42).

5. The range hood of claim 3, wherein: further comprising:

the smoke baffle assembly comprises a first smoke baffle (31) used for opening or closing the first air inlet (11) and a second smoke baffle (32) used for opening or closing the second air inlet (12);

the state recognition device is used for detecting whether the first smoke baffle (31) opens the first air inlet (11) or not and whether the second smoke baffle (32) opens the second air inlet (12) or not, and the state recognition device is electrically connected with the control system, so that the range hood at least has a first state, a second state and a third state;

in the first state, the first smoke baffle (31) opens the first air inlet (11), the second smoke baffle (32) closes the second air inlet (12), the second auxiliary fan (44) of the air curtain device (40) is closed, the first auxiliary fan (43) is started, air flow is sucked in through the air outlet holes of the second air flow distribution box (42), and the air flow is sprayed downwards through the air outlet holes of the first air flow distribution box (41) to form an air curtain;

in the second state, the first smoke baffle (31) closes the first air inlet (11), the second smoke baffle (32) opens the second air inlet (12), the first auxiliary fan (43) of the air curtain device (40) is closed, the second auxiliary fan (44) is opened, the air flow is sucked through the air outlet of the first air flow distribution box (41), and the air flow is sprayed downwards through the air outlet of the second air flow distribution box (42) to form an air curtain;

in the third state, the first smoke baffle (31) opens the first air inlet (11), the second smoke baffle (32) opens the second air inlet (12), and both the first auxiliary fan (43) and the second auxiliary fan (44) of the air curtain device (40) are closed.

6. The range hood of claim 5, wherein: the side of first cigarette board (31) with the left side position of first air intake (11) is articulated to drive by first electronic upset motion (33), the side of second cigarette board (32) with the right side position of second air intake (12) is articulated, and drives by electronic upset motion (34) of second, state recognition device is including the current detection device who is used for the current information to first electronic upset motion (33) and the electronic upset motion (34) of second.

7. The range hood of any one of claims 1-6, wherein: the first air inlet (11) inclines downwards from left to right, and the second air inlet (12) inclines downwards from right to left.

8. The range hood of claim 6, wherein: the bottom of the machine shell (10) is further provided with a lighting lamp (14) and an oil cup (15) in the area between the first air inlet (11) and the second air inlet (12), and the oil cup (15) is located on the rear side of the lighting lamp (14).

9. The range hood of any one of claims 1-6, wherein: the oil filter is characterized by further comprising a fan system (20), wherein the fan system (20) is located on the lower portion of the machine shell (10), an opening (17) and a turnover panel (16) capable of opening or closing the opening (17) are formed in the front side of the lower portion of the machine shell (10), an inlet of the fan system (20) is opposite to the opening (17) in the front side of the machine shell (10), and a first oil filter screen (21) is arranged.

10. The range hood of any one of claims 1-6, wherein: and second filtering screens (13) are arranged at the first air inlet (11) and the second air inlet (12).