CN217952413U - Fume exhauster - Google Patents

Abstract

The utility model relates to a kitchen appliance technical field discloses a range hood, including turning over the board and mending the wind fan. The turning plate is rotatably arranged on the front side of the shell of the range hood, is of a hollow structure, and defines a first air channel and a second air channel therein. The air supply fan can suck the outside fresh air of the range hood into the second air channel through the first air channel, and blow the fresh air to the smoke suction cavity through the air supply outlet, so that the air supply of the range hood is realized, the air inlet resistance of the range hood is reduced, and the smoke suction and discharge effects of the range hood are improved. Because the air supply outlet of the second air duct faces the smoke suction cavity, in the air supply process, the air blown out of the air supply outlet can guide the oil smoke to flow into the smoke suction cavity so as to generate an injection effect on the oil smoke, prevent the oil smoke from escaping and improve the smoke discharge effect. The escaping oil smoke at the front end of the turning plate can be sucked into the first air channel again by the air supplementing fan and is introduced into the smoke suction cavity through the air supplementing outlet of the second air channel to be discharged, namely, the design of the first air channel in the turning plate enlarges the smoke gathering range, and the oil smoke can be further prevented from escaping.

Description

Fume exhauster

Technical Field

The utility model relates to a kitchen appliance technical field especially relates to a range hood.

Background

The range hood is a kitchen appliance for purifying the kitchen environment, can quickly pump away waste burned by a stove and oil smoke harmful to human bodies generated in the cooking process, discharge the oil smoke out of a room, condense and collect the oil smoke, reduce pollution and purify air.

Current lampblack absorber only has the oil absorption cigarette function usually, under the condition that kitchen door and window closed, can make the air inlet resistance increase of lampblack absorber, and the fan can only promote power and increase the rotational speed and overcome air inlet resistance this moment, has produced bigger noise, and the power promotion of fan is limited, and when power reached the upper limit, the amount of wind can't continue the increase again, leads to the smoke exhaust effect of lampblack absorber not to reach the best.

Among the prior art, for promoting lampblack absorber smoke exhaust effect, some lampblack absorbers mend wind through setting up external inlet line on the furred ceiling, nevertheless because its mend wind mouth sets up inside the cupboard, do not combine with the cigarette machine, mend wind and can disturb the oil smoke on the contrary, lead to the oil smoke can't be absorbed by effective absorption. Although the front end of the existing European-style range hood is provided with the turning plate for gathering the smoke, the turning plate can only block the smoke passively, and part of the smoke with larger kinetic energy can escape.

SUMMERY OF THE UTILITY MODEL

Based on above problem, the utility model aims to provide a lampblack absorber, the integrated level is high, can the active absorption oil smoke, improves smoking, the smoke exhaust effect of lampblack absorber, prevents that the oil smoke from escaping.

In order to achieve the purpose, the utility model adopts the following technical proposal:

a range hood, comprising:

the turning plate is rotatably arranged on the front side of the shell of the range hood and can be rotatably unfolded or rotatably accommodated to the bottom of the range hood;

the turning plate is of a hollow structure, a first air channel and a second air channel are defined in the turning plate, the first air channel is communicated with the outside, one end of the second air channel is an air supplementing outlet, and the air supplementing outlet faces to a smoke suction cavity of the range hood;

and the air supplementing fan is arranged in the second air channel, an air inlet of the air supplementing fan is communicated with the first air channel, and an air outlet of the air supplementing fan is communicated with the air supplementing outlet.

As the utility model discloses a preferred scheme of lampblack absorber, turn over the board including the casing and set up in baffle in the casing, the baffle is in divide in the casing first wind channel with the second wind channel.

As the utility model discloses a preferred scheme of lampblack absorber, be provided with the mounting panel on the baffle, the mounting panel is in separate holding chamber and benefit wind passageway in the second wind channel, it is located to mend the wind fan the holding intracavity, and with mounting panel fixed connection, mend the wind fan the air outlet with it communicates to mend the wind passageway.

As the utility model discloses a preferred scheme of lampblack absorber, be provided with the board of wind equalizing in the tonifying wind passageway, be provided with a plurality of first ventilation holes on the board of wind equalizing, the wind that the tonifying wind fan blew off is via a plurality of first ventilation hole blow to the export of tonifying wind.

As the utility model discloses a preferred scheme of lampblack absorber, be provided with the through-hole on the baffle, the air intake of tonifying wind fan passes through the through-hole with first wind channel intercommunication.

As the utility model discloses a preferred scheme of lampblack absorber, the lampblack absorber still includes driving piece and transmission link mechanism, transmission link mechanism's one end with the output of driving piece is connected, the other end with turn over the board and connect, the driving piece is configured to pass through the drive of transmission link mechanism turns over the board and rotates.

As the utility model discloses a preferred scheme of lampblack absorber, transmission link mechanism includes the telescopic link and looks articulated first pole and second pole, first pole with the telescopic link rotates to be connected, turn over and be provided with the pivot on the board, the second pole with pivot fixed connection, the driving piece passes through the drive the telescopic link is flexible, so that first pole with the second pole drives turn over the board and rotate.

As the utility model discloses a preferred scheme of lampblack absorber, the air intake department in first wind channel is provided with the air inlet plate, be provided with a plurality of second ventholes on the air inlet plate, outside air is via a plurality of the second venthole lets in first wind channel.

As the utility model discloses a preferred scheme of lampblack absorber, the lampblack absorber still includes baffle and filter screen, the baffle set up in the smoking intracavity, and can with turn over the board and shelter from jointly the smoking chamber, the filter screen set up in on the baffle, and be located the baffle orientation one side in smoking chamber.

As the utility model discloses a preferred scheme of lampblack absorber, the lampblack absorber still including set up in smoke exhaust fan in the shell of lampblack absorber, smoke exhaust fan's air intake with smoking chamber intercommunication, smoke exhaust fan's air outlet with the pipe intercommunication of discharging fume of lampblack absorber.

The beneficial effects of the utility model are that:

the utility model provides a range hood when turning over the board and outwards expanding, can play and hold together the cigarette effect, does benefit to the smoking of range hood, discharges fume. When the lampblack absorber does not use, can rotate the bottom (smoking intracavity) of accomodating to the lampblack absorber with turning over the board again, save and take up an area of the space, can guarantee that the kitchen is neat and artistic. Through set up the air supply fan in the second wind channel that turns over the board, can inhale the second wind channel via first wind channel with the outside new air of lampblack absorber, blow the new air to smoking chamber via the outlet of air supply simultaneously for the lampblack absorber air supply reduces the air inlet resistance of lampblack absorber to promote the smoking of lampblack absorber, smoke exhaust effect. Because the air supplement outlet of the second air duct faces the smoke suction cavity, in the air supplement process, air blown out of the air supplement outlet can guide oil smoke to flow into the smoke suction cavity, so that the rising oil smoke is injected, all the oil smoke is injected and sucked into the cavity of the range hood, active smoke suction is realized, the oil smoke is prevented from escaping, and the smoke discharge effect is further improved. In the process that outside air is sucked into the interior of the turning plate through the first air channel, escaping oil smoke at the front end of the turning plate can be sucked into the first air channel again through the air supplementing fan and is discharged by being introduced into the smoke suction cavity through the air supplementing outlet of the second air channel, namely, the design of the first air channel in the turning plate enlarges the smoke gathering range, and the oil smoke can be further prevented from escaping. In addition, this lampblack absorber need not to set up the intake stack, and the integrated level is high, has avoided taking too big space in kitchen.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

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

fig. 2 is a second schematic structural diagram of the range hood according to the embodiment of the present invention;

fig. 3 is a schematic structural view of the range hood according to the embodiment of the present invention after the turning plate is stored;

fig. 4 is a schematic structural diagram of the range hood provided by the specific embodiment of the present invention after the turning plate is unfolded;

fig. 5 is a schematic view of an internal structure of a range hood according to an embodiment of the present invention;

fig. 6 is an exploded schematic view of a turning plate of a range hood according to an embodiment of the present invention;

FIG. 7 is an enlarged view of a portion of FIG. 6 at A;

fig. 8 is a schematic cross-sectional view of a turning plate of a range hood according to an embodiment of the present invention;

fig. 9 is a schematic view of the flow of air inside the flap according to the embodiment of the present invention;

fig. 10 is a schematic view of the oil smoke and the fresh air flowing of the range hood provided by the embodiment of the present invention.

In the figure:

1, turning a plate; 2-a housing; 3-air supplement fan; 4-a drive member; 5-a transmission linkage mechanism; 6-a baffle plate; 7-filtration

A net; 8-smoke exhaust fan;

11-a housing; 12-a separator; 13-a first air duct; 14-a second air duct; 15-a rotating shaft; 16-an air inlet plate;

121-a mounting plate; 122-air equalizing plate; 1221-a first vent; 123-through holes;

141-an accommodating cavity; 142-air supplement channel; 1421-outlet for air supplement;

161-second vent hole;

21-smoking cavity;

51-a telescopic rod; 52-a first lever; 53-second lever.

Detailed Description

In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 5, the present embodiment provides a range hood, which includes a turning plate 1 and an air supply fan 3.

Referring to fig. 1 and 2, the turning plate 1 is rotatably disposed on the front side of the housing 2 of the range hood and can be rotatably unfolded or rotatably accommodated at the bottom of the range hood. When a user cooks and uses the range hood, the turning plate 1 rotates and expands to realize smoke collection. After the range hood is used, the turning plate 1 rotates to be accommodated at the bottom of the range hood shell 2, and therefore occupied space is saved (as shown in figure 3). Further, referring to fig. 3, 4 and 8, the turning plate 1 is a hollow structure, a first air duct 13 and a second air duct 14 are defined in the turning plate 1, the first air duct 13 is communicated with the outside, one end of the second air duct 14 is an air supplement outlet 1421, and the air supplement outlet 1421 faces the smoke suction cavity 21 of the range hood. Air supplement fan 3 sets up in second wind channel 14, and air intake and first wind channel 13 intercommunication of air supplement fan 3, air supplement fan 3's air outlet and air supplement export 1421 intercommunication, and air supplement fan 3 can let in the smoking chamber 21 with outside air via first wind channel 13, second wind channel 14, air supplement export 1421 in proper order for the lampblack absorber air supplement.

The lampblack absorber that this embodiment provided, when turning over board 1 and outwards expanding, can play and gather together the cigarette effect, do benefit to the smoking of lampblack absorber, discharge fume. When the range hood is not used, the turning plate 1 can be rotated to be stored at the bottom of the range hood (in the smoke suction cavity 21), the occupied space is saved, and the kitchen is enabled to be neat and attractive. Through set up air supply fan 3 in turning over board 1's second wind channel 14, can inhale second wind channel 14 with the outside new air of lampblack absorber via first wind channel 13, blow to smoking chamber 21 with the new air via air supply export 1421 simultaneously, for the lampblack absorber air supply, reduce the air inlet resistance of lampblack absorber to promote the smoking of lampblack absorber, smoke exhaust effect. Because the air supplement outlet 1421 of the second air duct 14 faces the smoke suction cavity 21, in the air supplement process, air blown out from the air supplement outlet 1421 can guide the oil smoke to flow into the smoke suction cavity 21, so that an injection effect is generated on the rising oil smoke, all the oil smoke is injected into the cavity of the range hood, active smoke suction is realized, the oil smoke is prevented from escaping, and the smoke discharge effect is further improved.

In the process that external air is sucked into the turning plate 1 through the first air duct 13, escaping oil smoke at the front end of the turning plate 1 can be sucked into the first air duct 13 again by the air supplementing fan 3 and is introduced into the smoke suction cavity 21 through the air supplementing outlet 1421 of the second air duct 14 to be discharged, namely, the design of the first air duct 13 in the turning plate 1 enlarges the smoke collecting range, and can further prevent the oil smoke from escaping. In addition, this lampblack absorber need not to set up the intake stack, and the integrated level is high, has avoided taking too big space in kitchen.

Preferably, the air supply fan 3 is a thin fan, occupies a small space, can avoid the overall thickness of the turnover plate 2, and does not influence the design attractiveness of the range hood.

Optionally, referring to fig. 3, fig. 4 and fig. 5, the range hood further includes a driving part 4 and a transmission link mechanism 5, one end of the transmission link mechanism 5 is connected to an output end of the driving part 4, and the other end of the transmission link mechanism 5 is connected to the turning plate 1, and the driving part 4 is configured to be able to drive the turning plate 1 to rotate through the transmission link mechanism 5 to adjust a rotation angle of the turning plate 1, so as to adjust a blowing direction of the air supplement outlet 1421, and prevent the supplemented fresh air from interfering with absorption of the oil smoke. The setting of driving piece 4 and transmission link mechanism 5 makes to turn over board 1 and can expand to different angles according to the culinary art demand to effectively improve the smoking effect of lampblack absorber, and when the lampblack absorber did not use, can drive to turn over board 1 and rotate and accomodate to smoking chamber 21 in, convenient to use does not occupy the kitchen space, and the user uses to experience and feels good.

Optionally, referring to fig. 3 and 4, the transmission link mechanism 5 includes an expansion link 51, and a first rod 52 and a second rod 53 hinged to each other, the first rod 52 is rotatably connected to the expansion link 51, the turning plate 1 is provided with a rotating shaft 15, the second rod 53 is fixedly connected to the rotating shaft 15, and the driving member 4 extends and retracts by driving the expansion link 51, so that the first rod 52 and the second rod 53 drive the turning plate 1 to rotate. In this embodiment, the two ends of the turning plate 1 are both provided with a rotating shaft 15, the rotating shaft 15 is rotatably connected with the inner wall of the smoke ventilator housing 2, and the second rod 53 is fixedly connected with the rotating shaft 15 at one end of the turning plate 1. In an initial state, as shown in fig. 3, the flap 1 is housed in the smoking chamber 21 of the range hood. When the turning plate 1 needs to be unfolded, the driving part 4 drives the telescopic rod 51 to retract, and simultaneously drives the first rod 52 to move backwards, the first rod 52 pulls the second rod 53 to rotate, so that the turning plate 1 is driven by the rotating shaft 15 to rotate relative to the shell 2 of the range hood in the unfolding direction, and the state shown in fig. 4 is the state after the turning plate 1 is completely unfolded. Preferably, the first lever 52 is a curved lever, enabling a better control of the deployment angle of the flap 1.

In this embodiment, as shown in fig. 5, the driving member 4 is mounted on the rear sidewall of the range hood housing 2 through a fixing seat. The driving member 4 is preferably an electric motor, and an output shaft of the electric motor and the telescopic rod 51 may be connected through a gear box and a lead screw nut mechanism to achieve the extension and retraction of the telescopic rod 51, or may also be connected through a turbine worm transmission mechanism and a lead screw nut mechanism to achieve the extension and retraction of the telescopic rod 51. In other embodiments, the telescopic rod 51 can be extended and retracted directly through an air cylinder or a hydraulic cylinder mechanism, as long as the turnover plate 1 can be driven to rotate.

Alternatively, referring to fig. 6 and 8, the flap 1 includes a housing 11 and a partition 12 disposed in the housing 11, and the partition 12 divides a first air duct 13 and a second air duct 14 in the housing 11. Through setting up baffle 12 will turn over the inside first wind channel 13 and the second wind channel 14 that separate formation mutual independence of board 1 for turn over the inside air inlet of board 1 and the mutual noninterference of air-out, thereby can mend the wind for the lampblack absorber smoothly. In this embodiment, the partition 12 is an L-shaped plate, and the first air duct 13 and the second air duct 14 partitioned by the partition are both L-shaped channels.

Optionally, referring to fig. 6 and fig. 8, a mounting plate 121 is disposed on the partition 12, the mounting plate 121 divides an accommodating cavity 141 and an air supply channel 142 in the second air duct 14, the air supply fan 3 is located in the accommodating cavity 141 and is fixedly connected to the mounting plate 121, and an air outlet of the air supply fan 3 is communicated with the air supply channel 142. The setting of mounting panel 121 makes in the new trend that air supplement fan 3 inhales can concentrate the income air supplement passageway 142, reduces the waste of the amount of wind to effectively mend the wind for the lampblack absorber. In this embodiment, a gap is formed at a joint of the mounting plate 121 and the volute of the air supply fan 3, and the air outlet of the air supply fan 3 is communicated with the air supply channel 142 through the gap. The external air sucked from the first air duct 13 by the air supply fan 3 is introduced into the air supply channel 142 through the air outlet thereof, and is blown to the smoke suction cavity 21 through the air supply outlet 1421 to realize air supply, and the flow direction of the air in the flap 1 is shown as the arrow direction in fig. 9.

Optionally, referring to fig. 6 and 7, an air equalizing plate 122 is disposed in the air compensating channel 142, a plurality of first vent holes 1221 are disposed on the air equalizing plate 122, and the air blown by the air compensating fan 3 is blown to the air compensating outlet 1421 through the plurality of first vent holes 1221. The transverse uniformity of airflow at the air supply outlet 1421 is improved by arranging the air equalizing plate 122, and the injection area of air blown out from the air supply outlet 1421 to rising oil smoke is enlarged, so that the smoke exhaust effect of the range hood is effectively improved. In this embodiment, the plurality of first ventilation holes 1221 are evenly distributed on the air equalizing plate 122, so that the air blown out from the air supply outlet 1421 can be ensured to be more even.

Optionally, referring to fig. 6 and 8, a through hole 123 is provided on the partition 12, and an air inlet of the air supply fan 3 is communicated with the first air duct 13 through the through hole 123. Specifically, the volute of the air supplement fan 3 is hermetically connected with the partition plate 12, the air inlet on the volute is opposite to the through hole 123, and when the air supplement fan 3 is started, negative pressure is generated in the volute, so that air outside the range hood is sucked into the first air duct 13 and blown to the smoke suction cavity 21 through the air supplement outlet 1421 of the second air duct 14. In the air supply process, when part of oil smoke escapes from the front end of the turning plate 1, the escaped oil smoke is sucked into the first air duct 13 due to the negative pressure in the first air duct 13. Namely, the arrangement of the air supply fan 3 in the turning plate 1 can capture the oil smoke escaping from the front end of the turning plate 1 while supplying air, thereby effectively improving the smoking and smoke exhaust effects of the range hood.

In this embodiment, preferably, two air supply fans 3 are provided to ensure sufficient air supply amount. Correspondingly, two through holes 123 are provided on the partition board 12, and the two air supply fans 3 are respectively installed corresponding to the two through holes 123.

Alternatively, referring to fig. 1, 6 and 7, an air inlet plate 16 is disposed at an air inlet of the first air duct 13, a plurality of second air holes 161 are disposed on the air inlet plate 16, and the external air is introduced into the first air duct 13 through the plurality of second air holes 161. The air inlet plate 16 is arranged to facilitate the air at the front end of the turning plate 1 to flow into the first air duct 13, and to enable the air at the front end of the turning plate 1 to flow in uniformly. Meanwhile, the air inlet plate 16 can prevent impurities from entering the first air duct 13, and air duct blockage is avoided. Preferably, a plurality of second ventilation holes 161 evenly distributed is on air inlet plate 16, and second ventilation holes 161 is the vertical bar hole that sets up, is favorable to increasing the air inlet area to guarantee that the air inlet is more even.

In this embodiment, referring to fig. 4 and fig. 10, the fresh air blown out from the air supply outlet 1421 always faces the smoke suction cavity 21, and only performs an injection effect on the rising oil smoke, but does not blow away the oil smoke, thereby effectively improving the smoke discharge capacity of the range hood. The flow direction of the fresh air and the flow direction of the oil smoke are shown as the arrow directions in fig. 10, wherein the solid arrow indicates the flow direction of the fresh air, and the dotted arrow indicates the flow direction of the oil smoke. Preferably, when the flap 1 is unfolded to the maximum (as shown in fig. 10), the air blown from the air supply outlet 1421 is ejected in the maximum range, and the range of the limit angle closest to the smoke suction cavity 21 mainly ejects rising smoke, so that the smoke exhaust effect is good.

Optionally, referring to fig. 3, fig. 4 and fig. 5, the range hood further includes a smoke exhaust fan 8 disposed in the housing 2 of the range hood, an air inlet of the smoke exhaust fan 8 is communicated with the smoke exhaust cavity 21, and an air outlet of the smoke exhaust fan 8 is communicated with a smoke exhaust pipe of the range hood. The smoke exhaust pipe can be connected with a common flue, and after the smoke exhaust fan 8 is started, negative pressure is generated in the volute, so that oil smoke generated by cooking is continuously sucked in and exhausted out of a kitchen through the smoke exhaust pipe.

Optionally, referring to fig. 2 and 5, the range hood further includes a baffle 6 and a filter screen 7, the baffle 6 is disposed in the smoke suction cavity 21 and can shield the smoke suction cavity 21 together with the turning plate 1, and the filter screen 7 is disposed on the baffle 6 and is located on one side of the baffle 6 facing the smoke suction cavity 21. The baffle 6 is mainly used for guiding oil smoke and condensing oil smoke so that the oil smoke is rapidly discharged by the smoke exhaust fan 8, and meanwhile, the situation of smoke return can be avoided, and the air quality of a kitchen is improved. Turn over board 1 and fold and accomodate back and 6 docks with baffle, can shelter from smoking chamber 21 jointly, avoid the oil stain drippage in the smoking chamber 21, improved the user and used experience and feel. The filter screen 7 can filter large particle impurities carried in the oil smoke, and prevents the smoke exhaust fan 8 from sucking in a blockage to cause the blockage of the smoke exhaust pipe. Simultaneously can condense partial oil stain on the filter screen 7 to reduce the volume of condensing of oil stain in the exhaust fan 8, make things convenient for the later stage to clear up.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims (10)

1. A range hood, comprising:

the turning plate (1) is rotatably arranged on the front side of the shell (2) of the range hood, and can be rotatably unfolded or rotatably accommodated to the bottom of the range hood;

the turnover plate (1) is of a hollow structure, a first air channel (13) and a second air channel (14) are defined in the turnover plate, the first air channel (13) is communicated with the outside, one end of the second air channel (14) is an air supplementing outlet (1421), and the air supplementing outlet (1421) faces to a smoking cavity (21) of the range hood;

and the air supplementing fan (3) is arranged in the second air channel (14), an air inlet of the air supplementing fan (3) is communicated with the first air channel (13), and an air outlet of the air supplementing fan (3) is communicated with the air supplementing outlet (1421).

2. A range hood as claimed in claim 1, characterized in that the flap (1) comprises a housing (11) and a partition (12) arranged in the housing (11), the partition (12) separating the first air duct (13) and the second air duct (14) inside the housing (11).

3. A range hood as claimed in claim 2, wherein a mounting plate (121) is arranged on the partition plate (12), the mounting plate (121) is arranged in the second air duct (14) to separate an accommodating cavity (141) and an air supplementing channel (142), the air supplementing fan (3) is arranged in the accommodating cavity (141) and is fixedly connected with the mounting plate (121), and an air outlet of the air supplementing fan (3) is communicated with the air supplementing channel (142).

4. A range hood as claimed in claim 3, wherein an air-equalizing plate (122) is arranged in the air-supplementing channel (142), a plurality of first ventilation holes (1221) are arranged on the air-equalizing plate (122), and the air blown out by the air-supplementing fan (3) is blown to the air-supplementing outlet (1421) through the plurality of first ventilation holes (1221).

5. The range hood according to claim 2, wherein a through hole (123) is formed in the partition plate (12), and an air inlet of the air supplementing fan (3) is communicated with the first air duct (13) through the through hole (123).

6. A range hood as claimed in claim 1, characterized in that the range hood further comprises a driving part (4) and a transmission linkage (5), one end of the transmission linkage (5) is connected with the output end of the driving part (4), the other end is connected with the turning plate (1), and the driving part (4) is configured to drive the turning plate (1) to rotate through the transmission linkage (5).

7. A range hood as claimed in claim 6, characterized in that the transmission linkage mechanism (5) comprises a telescopic rod (51) and a first rod (52) and a second rod (53) which are hinged to each other, the first rod (52) is rotatably connected with the telescopic rod (51), a rotating shaft (15) is arranged on the turning plate (1), the second rod (53) is fixedly connected with the rotating shaft (15), and the driving member (4) is telescopic by driving the telescopic rod (51) so that the first rod (52) and the second rod (53) drive the turning plate (1) to rotate.

8. A range hood as claimed in any of claims 1 to 7, characterized in that an air inlet plate (16) is arranged at the air inlet of the first air duct (13), a plurality of second ventilation holes (161) are arranged on the air inlet plate (16), and the external air is introduced into the first air duct (13) through the plurality of second ventilation holes (161).

9. A range hood according to any one of claims 1-7, further comprising a baffle (6) and a filter screen (7), wherein the baffle (6) is disposed in the smoke suction chamber (21) and can shield the smoke suction chamber (21) together with the turning plate (1), and the filter screen (7) is disposed on the baffle (6) and is located on one side of the baffle (6) facing the smoke suction chamber (21).

10. A range hood according to any of claims 1-7, further comprising a smoke exhaust fan (8) disposed in the housing (2) of the range hood, wherein an air inlet of the smoke exhaust fan (8) is communicated with the smoke exhaust cavity (21), and an air outlet of the smoke exhaust fan (8) is communicated with a smoke exhaust pipe of the range hood.

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